Gtk.Widget

Subclasses:Gtk.Calendar, Gtk.CellView, Gtk.Container, Gtk.DrawingArea, Gtk.Entry, Gtk.GLArea, Gtk.HSV, Gtk.Invisible, Gtk.LevelBar, Gtk.Misc, Gtk.ProgressBar, Gtk.Range, Gtk.Separator, Gtk.Spinner, Gtk.Switch

Methods

Inherited:GObject.Object (40), Gtk.Buildable (10) Structs:Gtk.WidgetClass (12), GObject.ObjectClass (5)

class	bind_template_callback_full (callback_name, callback_symbol)
class	bind_template_child_full (name, internal_child, struct_offset)
class	find_style_property (property_name)
class	get_css_name ()
class	get_default_direction ()
class	get_default_style ()
class	install_style_property (pspec)
class	list_style_properties ()
class	pop_composite_child ()
class	push_composite_child ()
class	set_accessible_role (role)
class	set_accessible_type (type)
class	set_connect_func (connect_func, *connect_data)
class	set_css_name (name)
class	set_default_direction (dir)
class	set_template (template_bytes)
class	set_template_from_resource (resource_name)
	activate ()
	add_accelerator (accel_signal, accel_group, accel_key, accel_mods, accel_flags)
	add_device_events (device, events)
	add_events (events)
	add_mnemonic_label (label)
	add_tick_callback (callback, *user_data)
	can_activate_accel (signal_id)
	child_focus (direction)
	child_notify (child_property)
	class_path ()
	compute_expand (orientation)
	create_pango_context ()
	create_pango_layout (text)
	destroy ()
	destroyed (widget_pointer)
	device_is_shadowed (device)
	drag_begin (targets, actions, button, event)
	drag_begin_with_coordinates (targets, actions, button, event, x, y)
	drag_check_threshold (start_x, start_y, current_x, current_y)
	drag_dest_add_image_targets ()
	drag_dest_add_text_targets ()
	drag_dest_add_uri_targets ()
	drag_dest_find_target (context, target_list)
	drag_dest_get_target_list ()
	drag_dest_get_track_motion ()
	drag_dest_set (flags, targets, actions)
	drag_dest_set_proxy (proxy_window, protocol, use_coordinates)
	drag_dest_set_target_list (target_list)
	drag_dest_set_track_motion (track_motion)
	drag_dest_unset ()
	drag_get_data (context, target, time_)
	drag_highlight ()
	drag_source_add_image_targets ()
	drag_source_add_text_targets ()
	drag_source_add_uri_targets ()
	drag_source_get_target_list ()
	drag_source_set (start_button_mask, targets, actions)
	drag_source_set_icon_gicon (icon)
	drag_source_set_icon_name (icon_name)
	drag_source_set_icon_pixbuf (pixbuf)
	drag_source_set_icon_stock (stock_id)
	drag_source_set_target_list (target_list)
	drag_source_unset ()
	drag_unhighlight ()
	draw (cr)
	ensure_style ()
	error_bell ()
	event (event)
	freeze_child_notify ()
	get_accessible ()
	get_action_group (prefix)
	get_allocated_baseline ()
	get_allocated_height ()
	get_allocated_size ()
	get_allocated_width ()
	get_allocation ()
	get_ancestor (widget_type)
	get_app_paintable ()
	get_can_default ()
	get_can_focus ()
	get_child_requisition ()
	get_child_visible ()
	get_clip ()
	get_clipboard (selection)
	get_composite_name ()
	get_device_enabled (device)
	get_device_events (device)
	get_direction ()
	get_display ()
	get_double_buffered ()
	get_events ()
	get_focus_on_click ()
	get_font_map ()
	get_font_options ()
	get_frame_clock ()
	get_halign ()
	get_has_tooltip ()
	get_has_window ()
	get_hexpand ()
	get_hexpand_set ()
	get_mapped ()
	get_margin_bottom ()
	get_margin_end ()
	get_margin_left ()
	get_margin_right ()
	get_margin_start ()
	get_margin_top ()
	get_modifier_mask (intent)
	get_modifier_style ()
	get_name ()
	get_no_show_all ()
	get_opacity ()
	get_pango_context ()
	get_parent ()
	get_parent_window ()
	get_path ()
	get_pointer ()
	get_preferred_height ()
	get_preferred_height_and_baseline_for_width (width)
	get_preferred_height_for_width (width)
	get_preferred_size ()
	get_preferred_width ()
	get_preferred_width_for_height (height)
	get_realized ()
	get_receives_default ()
	get_request_mode ()
	get_requisition ()
	get_root_window ()
	get_scale_factor ()
	get_screen ()
	get_sensitive ()
	get_settings ()
	get_size_request ()
	get_state ()
	get_state_flags ()
	get_style ()
	get_style_context ()
	get_support_multidevice ()
	get_template_child (widget_type, name)
	get_tooltip_markup ()
	get_tooltip_text ()
	get_tooltip_window ()
	get_toplevel ()
	get_valign ()
	get_valign_with_baseline ()
	get_vexpand ()
	get_vexpand_set ()
	get_visible ()
	get_visual ()
	get_window ()
	grab_add ()
	grab_default ()
	grab_focus ()
	grab_remove ()
	has_default ()
	has_focus ()
	has_grab ()
	has_rc_style ()
	has_screen ()
	has_visible_focus ()
	hide ()
	hide_on_delete ()
	in_destruction ()
	init_template ()
	input_shape_combine_region (region)
	insert_action_group (name, group)
	intersect (area)
	is_ancestor (ancestor)
	is_composited ()
	is_drawable ()
	is_focus ()
	is_sensitive ()
	is_toplevel ()
	is_visible ()
	keynav_failed (direction)
	list_accel_closures ()
	list_action_prefixes ()
	list_mnemonic_labels ()
	map ()
	mnemonic_activate (group_cycling)
	modify_base (state, color)
	modify_bg (state, color)
	modify_cursor (primary, secondary)
	modify_fg (state, color)
	modify_font (font_desc)
	modify_style (style)
	modify_text (state, color)
	override_background_color (state, color)
	override_color (state, color)
	override_cursor (cursor, secondary_cursor)
	override_font (font_desc)
	override_symbolic_color (name, color)
	path ()
	queue_allocate ()
	queue_compute_expand ()
	queue_draw ()
	queue_draw_area (x, y, width, height)
	queue_draw_region (region)
	queue_resize ()
	queue_resize_no_redraw ()
	realize ()
	region_intersect (region)
	register_window (window)
	remove_accelerator (accel_group, accel_key, accel_mods)
	remove_mnemonic_label (label)
	remove_tick_callback (id)
	render_icon (stock_id, size, detail)
	render_icon_pixbuf (stock_id, size)
	reparent (new_parent)
	reset_rc_styles ()
	reset_style ()
	send_expose (event)
	send_focus_change (event)
	set_accel_path (accel_path, accel_group)
	set_allocation (allocation)
	set_app_paintable (app_paintable)
	set_can_default (can_default)
	set_can_focus (can_focus)
	set_child_visible (is_visible)
	set_clip (clip)
	set_composite_name (name)
	set_device_enabled (device, enabled)
	set_device_events (device, events)
	set_direction (dir)
	set_double_buffered (double_buffered)
	set_events (events)
	set_focus_on_click (focus_on_click)
	set_font_map (font_map)
	set_font_options (options)
	set_halign (align)
	set_has_tooltip (has_tooltip)
	set_has_window (has_window)
	set_hexpand (expand)
	set_hexpand_set (set)
	set_mapped (mapped)
	set_margin_bottom (margin)
	set_margin_end (margin)
	set_margin_left (margin)
	set_margin_right (margin)
	set_margin_start (margin)
	set_margin_top (margin)
	set_name (name)
	set_no_show_all (no_show_all)
	set_opacity (opacity)
	set_parent (parent)
	set_parent_window (parent_window)
	set_realized (realized)
	set_receives_default (receives_default)
	set_redraw_on_allocate (redraw_on_allocate)
	set_sensitive (sensitive)
	set_size_request (width, height)
	set_state (state)
	set_state_flags (flags, clear)
	set_style (style)
	set_support_multidevice (support_multidevice)
	set_tooltip_markup (markup)
	set_tooltip_text (text)
	set_tooltip_window (custom_window)
	set_valign (align)
	set_vexpand (expand)
	set_vexpand_set (set)
	set_visible (visible)
	set_visual (visual)
	set_window (window)
	shape_combine_region (region)
	show ()
	show_all ()
	show_now ()
	size_allocate (allocation)
	size_allocate_with_baseline (allocation, baseline)
	size_request ()
	style_attach ()
	style_get_property (property_name, value=None)
	thaw_child_notify ()
	translate_coordinates (dest_widget, src_x, src_y)
	trigger_tooltip_query ()
	unmap ()
	unparent ()
	unrealize ()
	unregister_window (window)
	unset_state_flags (flags)

Virtual Methods

Inherited:GObject.Object (7), Gtk.Buildable (10)

	do_adjust_baseline_allocation (baseline)
	do_adjust_baseline_request (minimum_baseline, natural_baseline)
	do_adjust_size_allocation (orientation, minimum_size, natural_size, allocated_pos, allocated_size)
	do_adjust_size_request (orientation, minimum_size, natural_size)
	do_button_press_event (event)
	do_button_release_event (event)
	do_can_activate_accel (signal_id)
	do_child_notify (child_property)
	do_composited_changed ()
	do_compute_expand (hexpand_p, vexpand_p)
	do_configure_event (event)
	do_damage_event (event)
	do_delete_event (event)
	do_destroy ()
	do_destroy_event (event)
	do_direction_changed (previous_direction)
	do_dispatch_child_properties_changed (n_pspecs, pspecs)
	do_drag_begin (context)
	do_drag_data_delete (context)
	do_drag_data_get (context, selection_data, info, time_)
	do_drag_data_received (context, x, y, selection_data, info, time_)
	do_drag_drop (context, x, y, time_)
	do_drag_end (context)
	do_drag_failed (context, result)
	do_drag_leave (context, time_)
	do_drag_motion (context, x, y, time_)
	do_draw (cr)
	do_enter_notify_event (event)
	do_event (event)
	do_focus (direction)
	do_focus_in_event (event)
	do_focus_out_event (event)
	do_get_accessible ()
	do_get_preferred_height ()
	do_get_preferred_height_and_baseline_for_width (width)
	do_get_preferred_height_for_width (width)
	do_get_preferred_width ()
	do_get_preferred_width_for_height (height)
	do_get_request_mode ()
	do_grab_broken_event (event)
	do_grab_focus ()
	do_grab_notify (was_grabbed)
	do_hide ()
	do_hierarchy_changed (previous_toplevel)
	do_key_press_event (event)
	do_key_release_event (event)
	do_keynav_failed (direction)
	do_leave_notify_event (event)
	do_map ()
	do_map_event (event)
	do_mnemonic_activate (group_cycling)
	do_motion_notify_event (event)
	do_move_focus (direction)
	do_parent_set (previous_parent)
	do_popup_menu ()
	do_property_notify_event (event)
	do_proximity_in_event (event)
	do_proximity_out_event (event)
	do_query_tooltip (x, y, keyboard_tooltip, tooltip)
	do_queue_draw_region (region)
	do_realize ()
	do_screen_changed (previous_screen)
	do_scroll_event (event)
	do_selection_clear_event (event)
	do_selection_get (selection_data, info, time_)
	do_selection_notify_event (event)
	do_selection_received (selection_data, time_)
	do_selection_request_event (event)
	do_show ()
	do_show_all ()
	do_show_help (help_type)
	do_size_allocate (allocation)
	do_state_changed (previous_state)
	do_state_flags_changed (previous_state_flags)
	do_style_set (previous_style)
	do_style_updated ()
	do_touch_event (event)
	do_unmap ()
	do_unmap_event (event)
	do_unrealize ()
	do_visibility_notify_event (event)
	do_window_state_event (event)

Properties

Name	Type	Flags	Short Description
app-paintable	bool	r/w/en	Whether the application will paint directly on the widget
can-default	bool	r/w/en	Whether the widget can be the default widget
can-focus	bool	r/w/en	Whether the widget can accept the input focus
composite-child	bool	r	Whether the widget is part of a composite widget
double-buffered	bool	d/r/w/en	Whether the widget is double buffered deprecated
events	Gdk.EventMask	r/w/en	The event mask that decides what kind of GdkEvents this widget gets
expand	bool	r/w	Whether widget wants to expand in both directions
focus-on-click	bool	r/w/en	Whether the widget should grab focus when it is clicked with the mouse
halign	Gtk.Align	r/w/en	How to position in extra horizontal space
has-default	bool	r/w/en	Whether the widget is the default widget
has-focus	bool	r/w/en	Whether the widget has the input focus
has-tooltip	bool	r/w/en	Whether this widget has a tooltip
height-request	int	r/w/en	Override for height request of the widget, or -1 if natural request should be used
hexpand	bool	r/w/en	Whether widget wants more horizontal space
hexpand-set	bool	r/w/en	Whether to use the hexpand property
is-focus	bool	r/w	Whether the widget is the focus widget within the toplevel
margin	int	r/w	Pixels of extra space on all four sides
margin-bottom	int	r/w/en	Pixels of extra space on the bottom side
margin-end	int	r/w/en	Pixels of extra space on the end
margin-left	int	d/r/w/en	Pixels of extra space on the left side deprecated
margin-right	int	d/r/w/en	Pixels of extra space on the right side deprecated
margin-start	int	r/w/en	Pixels of extra space on the start
margin-top	int	r/w/en	Pixels of extra space on the top side
name	str	r/w	The name of the widget
no-show-all	bool	r/w/en	Whether Gtk.Widget.show_all() should not affect this widget
opacity	float	r/w/en	The opacity of the widget, from 0 to 1
parent	Gtk.Container	r/w	The parent widget of this widget. Must be a Container widget
receives-default	bool	r/w/en	If True, the widget will receive the default action when it is focused
scale-factor	int	r	The scaling factor of the window
sensitive	bool	r/w/en	Whether the widget responds to input
style	Gtk.Style	d/r/w	The style of the widget, which contains information about how it will look (colors etc) deprecated
tooltip-markup	str	r/w	The contents of the tooltip for this widget
tooltip-text	str	r/w	The contents of the tooltip for this widget
valign	Gtk.Align	r/w/en	How to position in extra vertical space
vexpand	bool	r/w/en	Whether widget wants more vertical space
vexpand-set	bool	r/w/en	Whether to use the vexpand property
visible	bool	r/w/en	Whether the widget is visible
width-request	int	r/w/en	Override for width request of the widget, or -1 if natural request should be used
window	Gdk.Window	r	The widget’s window if it is realized

Style Properties

Name	Type	Default	Flags	Short Description
cursor-aspect-ratio	float	0.03999999910593033	r	Aspect ratio with which to draw insertion cursor
cursor-color	Gdk.Color	None	d/r	Color with which to draw insertion cursor deprecated
focus-line-pattern	str	'\x01\x01'	d/r	Dash pattern used to draw the focus indicator. The character values are interpreted as pixel widths of alternating on and off segments of the line. deprecated
focus-line-width	int	1	d/r	Width, in pixels, of the focus indicator line deprecated
focus-padding	int	1	d/r	Width, in pixels, between focus indicator and the widget ‘box’ deprecated
interior-focus	bool	True	d/r	Whether to draw the focus indicator inside widgets deprecated
link-color	Gdk.Color	None	d/r	Color of unvisited links deprecated
scroll-arrow-hlength	int	16	r	The length of horizontal scroll arrows
scroll-arrow-vlength	int	16	r	The length of vertical scroll arrows
secondary-cursor-color	Gdk.Color	None	d/r	Color with which to draw the secondary insertion cursor when editing mixed right-to-left and left-to-right text deprecated
separator-height	int	0	d/r	The height of separators if “wide-separators” is True deprecated
separator-width	int	0	d/r	The width of separators if wide-separators is True deprecated
text-handle-height	int	20	r	Height of text selection handles
text-handle-width	int	16	r	Width of text selection handles
visited-link-color	Gdk.Color	None	d/r	Color of visited links deprecated
wide-separators	bool	False	d/r	Whether separators have configurable width and should be drawn using a box instead of a line deprecated
window-dragging	bool	False	r	Whether windows can be dragged and maximized by clicking on empty areas

Signals

Inherited:GObject.Object (1)

Name	Short Description
accel-closures-changed
button-press-event	The ::button-press-event signal will be emitted when a button (typically from a mouse) is pressed.
button-release-event	The ::button-release-event signal will be emitted when a button (typically from a mouse) is released.
can-activate-accel	Determines whether an accelerator that activates the signal identified by signal_id can currently be activated.
child-notify	The ::child-notify signal is emitted for each ‘child property [child-properties]’ that has changed on an object.
composited-changed	The ::composited-changed signal is emitted when the composited status of widgets screen changes. deprecated
configure-event	The ::configure-event signal will be emitted when the size, position or stacking of the widget‘s window has changed.
damage-event	Emitted when a redirected window belonging to widget gets drawn into.
delete-event	The ::delete-event signal is emitted if a user requests that a toplevel window is closed.
destroy	Signals that all holders of a reference to the widget should release the reference that they hold.
destroy-event	The ::destroy-event signal is emitted when a Gdk.Window is destroyed.
direction-changed	The ::direction-changed signal is emitted when the text direction of a widget changes.
drag-begin	The ::drag-begin signal is emitted on the drag source when a drag is started.
drag-data-delete	The ::drag-data-delete signal is emitted on the drag source when a drag with the action Gdk.DragAction.MOVE is successfully completed.
drag-data-get	The ::drag-data-get signal is emitted on the drag source when the drop site requests the data which is dragged.
drag-data-received	The ::drag-data-received signal is emitted on the drop site when the dragged data has been received.
drag-drop	The ::drag-drop signal is emitted on the drop site when the user drops the data onto the widget.
drag-end	The ::drag-end signal is emitted on the drag source when a drag is finished.
drag-failed	The ::drag-failed signal is emitted on the drag source when a drag has failed.
drag-leave	The ::drag-leave signal is emitted on the drop site when the cursor leaves the widget.
drag-motion	The ::drag-motion signal is emitted on the drop site when the user moves the cursor over the widget during a drag.
draw	This signal is emitted when a widget is supposed to render itself.
enter-notify-event	The ::enter-notify-event will be emitted when the pointer enters the widget‘s window.
event	The GTK+ main loop will emit three signals for each GDK event delivered to a widget: one generic ::event signal, another, more specific, signal that matches the type of event delivered (e.g.
event-after	After the emission of the Gtk.Widget ::event signal and (optionally) the second more specific signal, ::event-after will be emitted regardless of the previous two signals handlers return values.
focus
focus-in-event	The ::focus-in-event signal will be emitted when the keyboard focus enters the widget‘s window.
focus-out-event	The ::focus-out-event signal will be emitted when the keyboard focus leaves the widget‘s window.
grab-broken-event	Emitted when a pointer or keyboard grab on a window belonging to widget gets broken.
grab-focus
grab-notify	The ::grab-notify signal is emitted when a widget becomes shadowed by a GTK+ grab (not a pointer or keyboard grab) on another widget, or when it becomes unshadowed due to a grab being removed.
hide	The ::hide signal is emitted when widget is hidden, for example with Gtk.Widget.hide().
hierarchy-changed	The ::hierarchy-changed signal is emitted when the anchored state of a widget changes.
key-press-event	The ::key-press-event signal is emitted when a key is pressed.
key-release-event	The ::key-release-event signal is emitted when a key is released.
keynav-failed	Gets emitted if keyboard navigation fails.
leave-notify-event	The ::leave-notify-event will be emitted when the pointer leaves the widget‘s window.
map	The ::map signal is emitted when widget is going to be mapped, that is when the widget is visible (which is controlled with Gtk.Widget.set_visible()) and all its parents up to the toplevel widget are also visible.
map-event	The ::map-event signal will be emitted when the widget‘s window is mapped.
mnemonic-activate	The default handler for this signal activates widget if group_cycling is False, or just makes widget grab focus if group_cycling is True.
motion-notify-event	The ::motion-notify-event signal is emitted when the pointer moves over the widget’s Gdk.Window.
move-focus
parent-set	The ::parent-set signal is emitted when a new parent has been set on a widget.
popup-menu	This signal gets emitted whenever a widget should pop up a context menu.
property-notify-event	The ::property-notify-event signal will be emitted when a property on the widget‘s window has been changed or deleted.
proximity-in-event	To receive this signal the Gdk.Window associated to the widget needs to enable the Gdk.EventMask.PROXIMITY_IN_MASK mask.
proximity-out-event	To receive this signal the Gdk.Window associated to the widget needs to enable the Gdk.EventMask.PROXIMITY_OUT_MASK mask.
query-tooltip	Emitted when Gtk.Widget :has-tooltip is True and the hover timeout has expired with the cursor hovering “above” widget; or emitted when widget got focus in keyboard mode.
realize	The ::realize signal is emitted when widget is associated with a Gdk.Window, which means that Gtk.Widget.realize() has been called or the widget has been mapped (that is, it is going to be drawn).
screen-changed	The ::screen-changed signal gets emitted when the screen of a widget has changed.
scroll-event	The ::scroll-event signal is emitted when a button in the 4 to 7 range is pressed.
selection-clear-event	The ::selection-clear-event signal will be emitted when the the widget‘s window has lost ownership of a selection.
selection-get
selection-notify-event
selection-received
selection-request-event	The ::selection-request-event signal will be emitted when another client requests ownership of the selection owned by the widget‘s window.
show	The ::show signal is emitted when widget is shown, for example with Gtk.Widget.show().
show-help
size-allocate
state-changed	The ::state-changed signal is emitted when the widget state changes. deprecated
state-flags-changed	The ::state-flags-changed signal is emitted when the widget state changes, see Gtk.Widget.get_state_flags().
style-set	The ::style-set signal is emitted when a new style has been set on a widget. deprecated
style-updated	The ::style-updated signal is a convenience signal that is emitted when the Gtk.StyleContext ::changed signal is emitted on the widget‘s associated Gtk.StyleContext as returned by Gtk.Widget.get_style_context().
touch-event
unmap	The ::unmap signal is emitted when widget is going to be unmapped, which means that either it or any of its parents up to the toplevel widget have been set as hidden.
unmap-event	The ::unmap-event signal will be emitted when the widget‘s window is unmapped.
unrealize	The ::unrealize signal is emitted when the Gdk.Window associated with widget is destroyed, which means that Gtk.Widget.unrealize() has been called or the widget has been unmapped (that is, it is going to be hidden).
visibility-notify-event	The ::visibility-notify-event will be emitted when the widget‘s window is obscured or unobscured. deprecated
window-state-event	The ::window-state-event will be emitted when the state of the toplevel window associated to the widget changes.

Fields

Inherited:GObject.Object (1)

Name	Type	Access	Description
parent_instance	GObject.InitiallyUnowned	r

Class Details

class Gtk.Widget(**kwargs)

Bases:GObject.InitiallyUnowned, Atk.ImplementorIface, Gtk.Buildable Abstract:Yes Structure:Gtk.WidgetClass

Gtk.Widget is the base class all widgets in GTK+ derive from. It manages the widget lifecycle, states and style.

Height-for-width Geometry Management

GTK+ uses a height-for-width (and width-for-height) geometry management system. Height-for-width means that a widget can change how much vertical space it needs, depending on the amount of horizontal space that it is given (and similar for width-for-height). The most common example is a label that reflows to fill up the available width, wraps to fewer lines, and therefore needs less height.

Height-for-width geometry management is implemented in GTK+ by way of five virtual methods:

• Gtk.Widget.do_get_request_mode()
• Gtk.Widget.do_get_preferred_width()
• Gtk.Widget.do_get_preferred_height()
• Gtk.Widget.do_get_preferred_height_for_width()
• Gtk.Widget.do_get_preferred_width_for_height()
• Gtk.Widget.do_get_preferred_height_and_baseline_for_width()

There are some important things to keep in mind when implementing height-for-width and when using it in container implementations.

The geometry management system will query a widget hierarchy in only one orientation at a time. When widgets are initially queried for their minimum sizes it is generally done in two initial passes in the Gtk.SizeRequestMode chosen by the toplevel.

For example, when queried in the normal Gtk.SizeRequestMode.HEIGHT_FOR_WIDTH mode: First, the default minimum and natural width for each widget in the interface will be computed using Gtk.Widget.get_preferred_width(). Because the preferred widths for each container depend on the preferred widths of their children, this information propagates up the hierarchy, and finally a minimum and natural width is determined for the entire toplevel. Next, the toplevel will use the minimum width to query for the minimum height contextual to that width using Gtk.Widget.get_preferred_height_for_width(), which will also be a highly recursive operation. The minimum height for the minimum width is normally used to set the minimum size constraint on the toplevel (unless Gtk.Window.set_geometry_hints() is explicitly used instead).

After the toplevel window has initially requested its size in both dimensions it can go on to allocate itself a reasonable size (or a size previously specified with Gtk.Window.set_default_size()). During the recursive allocation process it’s important to note that request cycles will be recursively executed while container widgets allocate their children. Each container widget, once allocated a size, will go on to first share the space in one orientation among its children and then request each child’s height for its target allocated width or its width for allocated height, depending. In this way a Gtk.Widget will typically be requested its size a number of times before actually being allocated a size. The size a widget is finally allocated can of course differ from the size it has requested. For this reason, Gtk.Widget caches a small number of results to avoid re-querying for the same sizes in one allocation cycle.

See ‘GtkContainer’s geometry management section [container-geometry-management]’ to learn more about how height-for-width allocations are performed by container widgets.

If a widget does move content around to intelligently use up the allocated size then it must support the request in both Gtk.SizeRequestModes even if the widget in question only trades sizes in a single orientation.

For instance, a Gtk.Label that does height-for-width word wrapping will not expect to have Gtk.Widget.do_get_preferred_height() called because that call is specific to a width-for-height request. In this case the label must return the height required for its own minimum possible width. By following this rule any widget that handles height-for-width or width-for-height requests will always be allocated at least enough space to fit its own content.

Here are some examples of how a Gtk.SizeRequestMode.HEIGHT_FOR_WIDTH widget generally deals with width-for-height requests, for Gtk.Widget.do_get_preferred_height() it will do:

static void
foo_widget_get_preferred_height (GtkWidget *widget,
                                 gint *min_height,
                                 gint *nat_height)
{
   if (i_am_in_height_for_width_mode)
     {
       gint min_width, nat_width;

       GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget,
                                                           &min_width,
                                                           &nat_width);
       GTK_WIDGET_GET_CLASS (widget)->get_preferred_height_for_width
                                                          (widget,
                                                           min_width,
                                                           min_height,
                                                           nat_height);
     }
   else
     {
        ... some widgets do both. For instance, if a GtkLabel is
        rotated to 90 degrees it will return the minimum and
        natural height for the rotated label here.
     }
}

And in Gtk.Widget.do_get_preferred_width_for_height() it will simply return the minimum and natural width:

static void
foo_widget_get_preferred_width_for_height (GtkWidget *widget,
                                           gint for_height,
                                           gint *min_width,
                                           gint *nat_width)
{
   if (i_am_in_height_for_width_mode)
     {
       GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget,
                                                           min_width,
                                                           nat_width);
     }
   else
     {
        ... again if a widget is sometimes operating in
        width-for-height mode (like a rotated GtkLabel) it can go
        ahead and do its real width for height calculation here.
     }
}

Often a widget needs to get its own request during size request or allocation. For example, when computing height it may need to also compute width. Or when deciding how to use an allocation, the widget may need to know its natural size. In these cases, the widget should be careful to call its virtual methods directly, like this:

GTK_WIDGET_GET_CLASS(widget)->get_preferred_width (widget,
&min,
&natural);

It will not work to use the wrapper functions, such as Gtk.Widget.get_preferred_width() inside your own size request implementation. These return a request adjusted by Gtk.SizeGroup and by the Gtk.Widget.do_adjust_size_request() virtual method. If a widget used the wrappers inside its virtual method implementations, then the adjustments (such as widget margins) would be applied twice. GTK+ therefore does not allow this and will warn if you try to do it.

Of course if you are getting the size request for another widget, such as a child of a container, you must use the wrapper APIs. Otherwise, you would not properly consider widget margins, Gtk.SizeGroup, and so forth.

Since 3.10 GTK+ also supports baseline vertical alignment of widgets. This means that widgets are positioned such that the typographical baseline of widgets in the same row are aligned. This happens if a widget supports baselines, has a vertical alignment of Gtk.Align.BASELINE, and is inside a container that supports baselines and has a natural “row” that it aligns to the baseline, or a baseline assigned to it by the grandparent.

Baseline alignment support for a widget is done by the Gtk.Widget.do_get_preferred_height_and_baseline_for_width() virtual function. It allows you to report a baseline in combination with the minimum and natural height. If there is no baseline you can return -1 to indicate this. The default implementation of this virtual function calls into the Gtk.Widget.do_get_preferred_height() and Gtk.Widget.do_get_preferred_height_for_width(), so if baselines are not supported it doesn’t need to be implemented.

If a widget ends up baseline aligned it will be allocated all the space in the parent as if it was Gtk.Align.FILL, but the selected baseline can be found via Gtk.Widget.get_allocated_baseline(). If this has a value other than -1 you need to align the widget such that the baseline appears at the position.

Style Properties

Gtk.Widget introduces “style properties” - these are basically object properties that are stored not on the object, but in the style object associated to the widget. Style properties are set in resource files. This mechanism is used for configuring such things as the location of the scrollbar arrows through the theme, giving theme authors more control over the look of applications without the need to write a theme engine in C.

Use Gtk.WidgetClass.install_style_property() to install style properties for a widget class, Gtk.WidgetClass.find_style_property() or Gtk.WidgetClass.list_style_properties() to get information about existing style properties and Gtk.Widget.style_get_property(), gtk_widget_style_get() or gtk_widget_style_get_valist() to obtain the value of a style property.

Gtk.Widget as Gtk.Buildable

The Gtk.Widget implementation of the Gtk.Buildable interface supports a custom <accelerator> element, which has attributes named ”key”, ”modifiers” and ”signal” and allows to specify accelerators.

An example of a UI definition fragment specifying an accelerator:

<object class="GtkButton">
  <accelerator key="q" modifiers="GDK_CONTROL_MASK" signal="clicked" />
</object>

In addition to accelerators, Gtk.Widget also support a custom <accessible> element, which supports actions and relations. Properties on the accessible implementation of an object can be set by accessing the internal child “accessible” of a Gtk.Widget.

An example of a UI definition fragment specifying an accessible:

<object class="GtkButton" id="label1" />
  <property name="label">I am a Label for a Button</property>
</object>
<object class="GtkButton" id="button1">
  <accessibility>
    <action action_name="click" translatable="yes">Click the button.</action>
    <relation target="label1" type="labelled-by" />
  </accessibility>
  <child internal-child="accessible">
    <object class="AtkObject" id="a11y-button1">
      <property name="accessible-name">Clickable Button</property>
    </object>
  </child>
</object>

Finally, Gtk.Widget allows style information such as style classes to be associated with widgets, using the custom <style> element:

<object class="GtkButton" id="button1">
  <style>
    <class name="my-special-button-class" />
    <class name="dark-button" />
  </style>
</object>

Building composite widgets from template XML

Gtk.Widget exposes some facilities to automate the procedure of creating composite widgets using Gtk.Builder interface description language.

To create composite widgets with Gtk.Builder XML, one must associate the interface description with the widget class at class initialization time using Gtk.WidgetClass.set_template().

The interface description semantics expected in composite template descriptions is slightly different from regular Gtk.Builder XML.

Unlike regular interface descriptions, Gtk.WidgetClass.set_template() will expect a <template> tag as a direct child of the toplevel tag. The <template> tag must specify the “class” attribute which must be the type name of the widget. Optionally, the “parent” attribute may be specified to specify the direct parent type of the widget type, this is ignored by the Gtk.Builder but required for Glade to introspect what kind of properties and internal children exist for a given type when the actual type does not exist.

The XML which is contained inside the <template> tag behaves as if it were added to the <object> tag defining widget itself. You may set properties on widget by inserting tags into the <template> tag, and also add <child> tags to add children and extend widget in the normal way you would with <object> tags.

Additionally, <object> tags can also be added before and after the initial <template> tag in the normal way, allowing one to define auxiliary objects which might be referenced by other widgets declared as children of the <template> tag.

An example of a Gtk.Builder Template Definition:

<interface>
  <template class="FooWidget" parent="GtkBox">
    <property name="orientation">GTK_ORIENTATION_HORIZONTAL</property>
    <property name="spacing">4</property>
    <child>
      <object class="GtkButton" id="hello_button">
        <property name="label">Hello World</property>
        <signal name="clicked" handler="hello_button_clicked" object="FooWidget" swapped="yes" />
      </object>
    </child>
    <child>
      <object class="GtkButton" id="goodbye_button">
        <property name="label">Goodbye World</property>
      </object>
    </child>
  </template>
</interface>

Typically, you’ll place the template fragment into a file that is bundled with your project, using Gio.Resource. In order to load the template, you need to call Gtk.WidgetClass.set_template_from_resource() from the class initialization of your Gtk.Widget type:

static void
foo_widget_class_init (FooWidgetClass *klass)
{
  // ...

  gtk_widget_class_set_template_from_resource (GTK_WIDGET_CLASS (klass),
                                               "/com/example/ui/foowidget.ui");
}

You will also need to call Gtk.Widget.init_template() from the instance initialization function:

static void
foo_widget_init (FooWidget *self)
{
  // ...
  gtk_widget_init_template (GTK_WIDGET (self));
}

You can access widgets defined in the template using the Gtk.Widget.get_template_child() function, but you will typically declare a pointer in the instance private data structure of your type using the same name as the widget in the template definition, and call gtk_widget_class_bind_template_child_private() with that name, e.g.

typedef struct {
  GtkWidget *hello_button;
  GtkWidget *goodbye_button;
} FooWidgetPrivate;

G_DEFINE_TYPE_WITH_PRIVATE (FooWidget, foo_widget, GTK_TYPE_BOX)

static void
foo_widget_class_init (FooWidgetClass *klass)
{
  // ...
  gtk_widget_class_set_template_from_resource (GTK_WIDGET_CLASS (klass),
                                               "/com/example/ui/foowidget.ui");
  gtk_widget_class_bind_template_child_private (GTK_WIDGET_CLASS (klass),
                                                FooWidget, hello_button);
  gtk_widget_class_bind_template_child_private (GTK_WIDGET_CLASS (klass),
                                                FooWidget, goodbye_button);
}

You can also use gtk_widget_class_bind_template_callback() to connect a signal callback defined in the template with a function visible in the scope of the class, e.g.

// the signal handler has the instance and user data swapped
// because of the swapped="yes" attribute in the template XML
static void
hello_button_clicked (FooWidget *self,
                      GtkButton *button)
{
  g_print ("Hello, world!\n");
}

static void
foo_widget_class_init (FooWidgetClass *klass)
{
  // ...
  gtk_widget_class_set_template_from_resource (GTK_WIDGET_CLASS (klass),
                                               "/com/example/ui/foowidget.ui");
  gtk_widget_class_bind_template_callback (GTK_WIDGET_CLASS (klass), hello_button_clicked);
}

classmethod bind_template_callback_full(callback_name, callback_symbol)

Parameters:

• callback_name (str) – The name of the callback as expected in the template XML
• callback_symbol (GObject.Callback) – The callback symbol

Declares a callback_symbol to handle callback_name from the template XML defined for widget_type. See Gtk.Builder.add_callback_symbol().

Note that this must be called from a composite widget classes class initializer after calling Gtk.WidgetClass.set_template().

New in version 3.10.

classmethod bind_template_child_full(name, internal_child, struct_offset)

Parameters:

• name (str) – The “id” of the child defined in the template XML
• internal_child (bool) – Whether the child should be accessible as an “internal-child” when this class is used in Gtk.Builder XML
• struct_offset (int) – The structure offset into the composite widget’s instance public or private structure where the automated child pointer should be set, or 0 to not assign the pointer.

Automatically assign an object declared in the class template XML to be set to a location on a freshly built instance’s private data, or alternatively accessible via Gtk.Widget.get_template_child().

The struct can point either into the public instance, then you should use G_STRUCT_OFFSET(WidgetType, member) for struct_offset, or in the private struct, then you should use G_PRIVATE_OFFSET(WidgetType, member).

An explicit strong reference will be held automatically for the duration of your instance’s life cycle, it will be released automatically when GObject.Object.do_dispose() runs on your instance and if a struct_offset that is != 0 is specified, then the automatic location in your instance public or private data will be set to None. You can however access an automated child pointer the first time your classes GObject.Object.do_dispose() runs, or alternatively in Gtk.Widget.do_destroy().

If internal_child is specified, Gtk.Buildable.do_get_internal_child() will be automatically implemented by the Gtk.Widget class so there is no need to implement it manually.

The wrapper macros gtk_widget_class_bind_template_child(), gtk_widget_class_bind_template_child_internal(), gtk_widget_class_bind_template_child_private() and gtk_widget_class_bind_template_child_internal_private() might be more convenient to use.

Note that this must be called from a composite widget classes class initializer after calling Gtk.WidgetClass.set_template().

New in version 3.10.

classmethod find_style_property(property_name)

Parameters:property_name (str) – the name of the style property to find Returns:the GObject.ParamSpec of the style property or None if class has no style property with that name. Return type:GObject.ParamSpec

Finds a style property of a widget class by name.

New in version 2.2.

classmethod get_css_name()

Returns:the CSS name of the given class Return type:str

Gets the name used by this class for matching in CSS code. See Gtk.WidgetClass.set_css_name() for details.

New in version 3.20.

classmethod get_default_direction()

Returns:the current default direction. Return type:Gtk.TextDirection

Obtains the current default reading direction. See Gtk.Widget.set_default_direction().

classmethod get_default_style()

Returns:the default style. This Gtk.Style object is owned by GTK+ and should not be modified or freed. Return type:Gtk.Style

Returns the default style used by all widgets initially.

Deprecated since version 3.0: Use Gtk.StyleContext instead, and Gtk.CssProvider.get_default() to obtain a Gtk.StyleProvider with the default widget style information.

classmethod install_style_property(pspec)

Parameters:pspec (GObject.ParamSpec) – the GObject.ParamSpec for the property

Installs a style property on a widget class. The parser for the style property is determined by the value type of pspec.

classmethod list_style_properties()

Returns:a newly allocated array of GObject.ParamSpec. The array must be freed with GLib.free(). Return type:[GObject.ParamSpec]

Returns all style properties of a widget class.

New in version 2.2.

classmethod pop_composite_child()

Cancels the effect of a previous call to Gtk.Widget.push_composite_child().

Deprecated since version 3.10: Use Gtk.WidgetClass.set_template(), or don’t use this API at all.

classmethod push_composite_child()

Makes all newly-created widgets as composite children until the corresponding Gtk.Widget.pop_composite_child() call.

A composite child is a child that’s an implementation detail of the container it’s inside and should not be visible to people using the container. Composite children aren’t treated differently by GTK+ (but see Gtk.Container.foreach() vs. Gtk.Container.forall()), but e.g. GUI builders might want to treat them in a different way.

Deprecated since version 3.10: This API never really worked well and was mostly unused, now we have a more complete mechanism for composite children, see Gtk.WidgetClass.set_template().

classmethod set_accessible_role(role)

Parameters:role (Atk.Role) – The role to use for accessibles created for self

Sets the default Atk.Role to be set on accessibles created for widgets of self. Accessibles may decide to not honor this setting if their role reporting is more refined. Calls to Gtk.WidgetClass.set_accessible_type() will reset this value.

In cases where you want more fine-grained control over the role of accessibles created for self, you should provide your own accessible type and use Gtk.WidgetClass.set_accessible_type() instead.

If role is Atk.Role.INVALID, the default role will not be changed and the accessible’s default role will be used instead.

This function should only be called from class init functions of widgets.

New in version 3.2.

classmethod set_accessible_type(type)

Parameters:type (GObject.GType) – The object type that implements the accessible for self

Sets the type to be used for creating accessibles for widgets of self. The given type must be a subtype of the type used for accessibles of the parent class.

This function should only be called from class init functions of widgets.

New in version 3.2.

classmethod set_connect_func(connect_func, *connect_data)

Parameters:

• connect_func (Gtk.BuilderConnectFunc) – The Gtk.BuilderConnectFunc to use when connecting signals in the class template
• connect_data (object or None) – The data to pass to connect_func

For use in language bindings, this will override the default Gtk.BuilderConnectFunc to be used when parsing Gtk.Builder XML from this class’s template data.

Note that this must be called from a composite widget classes class initializer after calling Gtk.WidgetClass.set_template().

New in version 3.10.

classmethod set_css_name(name)

Parameters:name (str) – name to use

Sets the name to be used for CSS matching of widgets.

If this function is not called for a given class, the name of the parent class is used.

New in version 3.20.

classmethod set_default_direction(dir)

Parameters:dir (Gtk.TextDirection) – the new default direction. This cannot be Gtk.TextDirection.NONE.

Sets the default reading direction for widgets where the direction has not been explicitly set by Gtk.Widget.set_direction().

classmethod set_template(template_bytes)

Parameters:template_bytes (GLib.Bytes) – A GLib.Bytes holding the Gtk.Builder XML

This should be called at class initialization time to specify the Gtk.Builder XML to be used to extend a widget.

For convenience, Gtk.WidgetClass.set_template_from_resource() is also provided.

Note that any class that installs templates must call Gtk.Widget.init_template() in the widget’s instance initializer.

New in version 3.10.

classmethod set_template_from_resource(resource_name)

Parameters:resource_name (str) – The name of the resource to load the template from

A convenience function to call Gtk.WidgetClass.set_template().

Note that any class that installs templates must call Gtk.Widget.init_template() in the widget’s instance initializer.

New in version 3.10.

activate()

Returns:True if the widget was activatable Return type:bool

For widgets that can be “activated” (buttons, menu items, etc.) this function activates them. Activation is what happens when you press Enter on a widget during key navigation. If self isn’t activatable, the function returns False.

add_accelerator(accel_signal, accel_group, accel_key, accel_mods, accel_flags)

Parameters:

• accel_signal (str) – widget signal to emit on accelerator activation
• accel_group (Gtk.AccelGroup) – accel group for this widget, added to its toplevel
• accel_key (int) – GDK keyval of the accelerator
• accel_mods (Gdk.ModifierType) – modifier key combination of the accelerator
• accel_flags (Gtk.AccelFlags) – flag accelerators, e.g. Gtk.AccelFlags.VISIBLE

Installs an accelerator for this self in accel_group that causes accel_signal to be emitted if the accelerator is activated. The accel_group needs to be added to the widget’s toplevel via Gtk.Window.add_accel_group(), and the signal must be of type GObject.SignalFlags.ACTION. Accelerators added through this function are not user changeable during runtime. If you want to support accelerators that can be changed by the user, use Gtk.AccelMap.add_entry() and Gtk.Widget.set_accel_path() or Gtk.MenuItem.set_accel_path() instead.

add_device_events(device, events)

Parameters:

• device (Gdk.Device) – a Gdk.Device
• events (Gdk.EventMask) – an event mask, see Gdk.EventMask

Adds the device events in the bitfield events to the event mask for self. See Gtk.Widget.set_device_events() for details.

New in version 3.0.

add_events(events)

Parameters:events (int) – an event mask, see Gdk.EventMask

Adds the events in the bitfield events to the event mask for self. See Gtk.Widget.set_events() and the input handling overview for details.

add_mnemonic_label(label)

Parameters:label (Gtk.Widget) – a Gtk.Widget that acts as a mnemonic label for self

Adds a widget to the list of mnemonic labels for this widget. (See Gtk.Widget.list_mnemonic_labels()). Note the list of mnemonic labels for the widget is cleared when the widget is destroyed, so the caller must make sure to update its internal state at this point as well, by using a connection to the Gtk.Widget ::destroy signal or a weak notifier.

New in version 2.4.

add_tick_callback(callback, *user_data)

Parameters:

• callback (Gtk.TickCallback) – function to call for updating animations
• user_data (object or None) – data to pass to callback

Returns:

an id for the connection of this callback. Remove the callback by passing it to Gtk.Widget.remove_tick_callback()

Return type:

int

Queues an animation frame update and adds a callback to be called before each frame. Until the tick callback is removed, it will be called frequently (usually at the frame rate of the output device or as quickly as the application can be repainted, whichever is slower). For this reason, is most suitable for handling graphics that change every frame or every few frames. The tick callback does not automatically imply a relayout or repaint. If you want a repaint or relayout, and aren’t changing widget properties that would trigger that (for example, changing the text of a Gtk.Label), then you will have to call Gtk.Widget.queue_resize() or Gtk.Widget.queue_draw_area() yourself.

Gdk.FrameClock.get_frame_time() should generally be used for timing continuous animations and Gdk.FrameTimings.get_predicted_presentation_time() if you are trying to display isolated frames at particular times.

This is a more convenient alternative to connecting directly to the Gdk.FrameClock ::update signal of Gdk.FrameClock, since you don’t have to worry about when a Gdk.FrameClock is assigned to a widget.

New in version 3.8.

can_activate_accel(signal_id)

Parameters:signal_id (int) – the ID of a signal installed on self Returns:True if the accelerator can be activated. Return type:bool

Determines whether an accelerator that activates the signal identified by signal_id can currently be activated. This is done by emitting the Gtk.Widget ::can-activate-accel signal on self; if the signal isn’t overridden by a handler or in a derived widget, then the default check is that the widget must be sensitive, and the widget and all its ancestors mapped.

New in version 2.4.

child_focus(direction)

Parameters:direction (Gtk.DirectionType) – direction of focus movement Returns:True if focus ended up inside self Return type:bool

This function is used by custom widget implementations; if you’re writing an app, you’d use Gtk.Widget.grab_focus() to move the focus to a particular widget, and Gtk.Container.set_focus_chain() to change the focus tab order. So you may want to investigate those functions instead.

Gtk.Widget.child_focus() is called by containers as the user moves around the window using keyboard shortcuts. direction indicates what kind of motion is taking place (up, down, left, right, tab forward, tab backward). Gtk.Widget.child_focus() emits the Gtk.Widget ::focus signal; widgets override the default handler for this signal in order to implement appropriate focus behavior.

The default ::focus handler for a widget should return True if moving in direction left the focus on a focusable location inside that widget, and False if moving in direction moved the focus outside the widget. If returning True, widgets normally call Gtk.Widget.grab_focus() to place the focus accordingly; if returning False, they don’t modify the current focus location.

child_notify(child_property)

Parameters:child_property (str) – the name of a child property installed on the class of self’s parent

Emits a Gtk.Widget ::child-notify signal for the ‘child property [child-properties]’ child_property on self.

This is the analogue of GObject.Object.notify() for child properties.

Also see Gtk.Container.child_notify().

class_path()

Returns:

path_length:location to store the length of the class path, or None path:location to store the class path as an allocated string, or None path_reversed:location to store the reverse class path as an allocated string, or None

Return type:(path_length: int, path: str, path_reversed: str)

Same as Gtk.Widget.path(), but always uses the name of a widget’s type, never uses a custom name set with Gtk.Widget.set_name().

Deprecated since version 3.0: Use Gtk.Widget.get_path() instead

compute_expand(orientation)

Parameters:orientation (Gtk.Orientation) – expand direction Returns:whether widget tree rooted here should be expanded Return type:bool

Computes whether a container should give this widget extra space when possible. Containers should check this, rather than looking at Gtk.Widget.get_hexpand() or Gtk.Widget.get_vexpand().

This function already checks whether the widget is visible, so visibility does not need to be checked separately. Non-visible widgets are not expanded.

The computed expand value uses either the expand setting explicitly set on the widget itself, or, if none has been explicitly set, the widget may expand if some of its children do.

create_pango_context()

Returns:the new Pango.Context Return type:Pango.Context

Creates a new Pango.Context with the appropriate font map, font options, font description, and base direction for drawing text for this widget. See also Gtk.Widget.get_pango_context().

create_pango_layout(text)

Parameters:text (str or None) – text to set on the layout (can be None) Returns:the new Pango.Layout Return type:Pango.Layout

Creates a new Pango.Layout with the appropriate font map, font description, and base direction for drawing text for this widget.

If you keep a Pango.Layout created in this way around, you need to re-create it when the widget Pango.Context is replaced. This can be tracked by using the Gtk.Widget ::screen-changed signal on the widget.

destroy()

Destroys a widget.

When a widget is destroyed all references it holds on other objects will be released:

• if the widget is inside a container, it will be removed from its parent
• if the widget is a container, all its children will be destroyed, recursively
• if the widget is a top level, it will be removed from the list of top level widgets that GTK+ maintains internally

It’s expected that all references held on the widget will also be released; you should connect to the Gtk.Widget ::destroy signal if you hold a reference to self and you wish to remove it when this function is called. It is not necessary to do so if you are implementing a Gtk.Container, as you’ll be able to use the Gtk.Container.do_remove() virtual function for that.

It’s important to notice that Gtk.Widget.destroy() will only cause the self to be finalized if no additional references, acquired using GObject.Object.ref(), are held on it. In case additional references are in place, the self will be in an “inert” state after calling this function; self will still point to valid memory, allowing you to release the references you hold, but you may not query the widget’s own state.

You should typically call this function on top level widgets, and rarely on child widgets.

See also: Gtk.Container.remove()

destroyed(widget_pointer)

Parameters:widget_pointer (Gtk.Widget) – address of a variable that contains self Returns:address of a variable that contains self Return type:widget_pointer: Gtk.Widget

This function sets widget_pointer to None if widget_pointer != None. It’s intended to be used as a callback connected to the “destroy” signal of a widget. You connect Gtk.Widget.destroyed() as a signal handler, and pass the address of your widget variable as user data. Then when the widget is destroyed, the variable will be set to None. Useful for example to avoid multiple copies of the same dialog.

device_is_shadowed(device)

Parameters:device (Gdk.Device) – a Gdk.Device Returns:True if there is an ongoing grab on device by another Gtk.Widget than self. Return type:bool

Returns True if device has been shadowed by a GTK+ device grab on another widget, so it would stop sending events to self. This may be used in the Gtk.Widget ::grab-notify signal to check for specific devices. See Gtk.device_grab_add().

New in version 3.0.

drag_begin(targets, actions, button, event)

Parameters:

• targets (Gtk.TargetList) – The targets (data formats) in which the source can provide the data
• actions (Gdk.DragAction) – A bitmask of the allowed drag actions for this drag
• button (int) – The button the user clicked to start the drag
• event (Gdk.Event or None) – The event that triggered the start of the drag, or None if none can be obtained.

Returns:

the context for this drag

Return type:

Gdk.DragContext

This function is equivalent to Gtk.Widget.drag_begin_with_coordinates(), passing -1, -1 as coordinates.

Deprecated since version 3.10: Use Gtk.Widget.drag_begin_with_coordinates() instead

drag_begin_with_coordinates(targets, actions, button, event, x, y)

Parameters:

• targets (Gtk.TargetList) – The targets (data formats) in which the source can provide the data
• actions (Gdk.DragAction) – A bitmask of the allowed drag actions for this drag
• button (int) – The button the user clicked to start the drag
• event (Gdk.Event or None) – The event that triggered the start of the drag, or None if none can be obtained.
• x (int) – The initial x coordinate to start dragging from, in the coordinate space of self. If -1 is passed, the coordinates are retrieved from event or the current pointer position
• y (int) – The initial y coordinate to start dragging from, in the coordinate space of self. If -1 is passed, the coordinates are retrieved from event or the current pointer position

Returns:

the context for this drag

Return type:

Gdk.DragContext

Initiates a drag on the source side. The function only needs to be used when the application is starting drags itself, and is not needed when Gtk.Widget.drag_source_set() is used.

The event is used to retrieve the timestamp that will be used internally to grab the pointer. If event is None, then Gdk.CURRENT_TIME will be used. However, you should try to pass a real event in all cases, since that can be used to get information about the drag.

Generally there are three cases when you want to start a drag by hand by calling this function:

During a Gtk.Widget ::button-press-event handler, if you want to start a drag immediately when the user presses the mouse button. Pass the event that you have in your Gtk.Widget ::button-press-event handler.

During a Gtk.Widget ::motion-notify-event handler, if you want to start a drag when the mouse moves past a certain threshold distance after a button-press. Pass the event that you have in your Gtk.Widget ::motion-notify-event handler.

During a timeout handler, if you want to start a drag after the mouse button is held down for some time. Try to save the last event that you got from the mouse, using Gdk.Event.copy(), and pass it to this function (remember to free the event with Gdk.Event.free() when you are done). If you can really not pass a real event, pass None instead.

New in version 3.10.

drag_check_threshold(start_x, start_y, current_x, current_y)

Parameters:

• start_x (int) – X coordinate of start of drag
• start_y (int) – Y coordinate of start of drag
• current_x (int) – current X coordinate
• current_y (int) – current Y coordinate

Returns:

True if the drag threshold has been passed.

Return type:

bool

Checks to see if a mouse drag starting at (start_x, start_y) and ending at (current_x, current_y) has passed the GTK+ drag threshold, and thus should trigger the beginning of a drag-and-drop operation.

drag_dest_add_image_targets()

Add the image targets supported by Gtk.SelectionData to the target list of the drag destination. The targets are added with info = 0. If you need another value, use Gtk.TargetList.add_image_targets() and Gtk.Widget.drag_dest_set_target_list().

New in version 2.6.

drag_dest_add_text_targets()

Add the text targets supported by Gtk.SelectionData to the target list of the drag destination. The targets are added with info = 0. If you need another value, use Gtk.TargetList.add_text_targets() and Gtk.Widget.drag_dest_set_target_list().

New in version 2.6.

drag_dest_add_uri_targets()

Add the URI targets supported by Gtk.SelectionData to the target list of the drag destination. The targets are added with info = 0. If you need another value, use Gtk.TargetList.add_uri_targets() and Gtk.Widget.drag_dest_set_target_list().

New in version 2.6.

drag_dest_find_target(context, target_list)

Parameters:

• context (Gdk.DragContext) – drag context
• target_list (Gtk.TargetList or None) – list of droppable targets, or None to use Gtk.Widget.drag_dest_get_target_list (self).

Returns:

first target that the source offers and the dest can accept, or %GDK_NONE

Return type:

Gdk.Atom

Looks for a match between the supported targets of context and the dest_target_list, returning the first matching target, otherwise returning %GDK_NONE. dest_target_list should usually be the return value from Gtk.Widget.drag_dest_get_target_list(), but some widgets may have different valid targets for different parts of the widget; in that case, they will have to implement a drag_motion handler that passes the correct target list to this function.

drag_dest_get_target_list()

Returns:the Gtk.TargetList, or None if none Return type:Gtk.TargetList or None

Returns the list of targets this widget can accept from drag-and-drop.

drag_dest_get_track_motion()

Returns:True if the widget always emits Gtk.Widget ::drag-motion events Return type:bool

Returns whether the widget has been configured to always emit Gtk.Widget ::drag-motion signals.

New in version 2.10.

drag_dest_set(flags, targets, actions)

Parameters:

• flags (Gtk.DestDefaults) – which types of default drag behavior to use
• targets ([Gtk.TargetEntry] or None) – a pointer to an array of Gtk.TargetEntrys indicating the drop types that this self will accept, or None. Later you can access the list with Gtk.Widget.drag_dest_get_target_list() and Gtk.Widget.drag_dest_find_target().
• actions (Gdk.DragAction) – a bitmask of possible actions for a drop onto this self.

Sets a widget as a potential drop destination, and adds default behaviors.

The default behaviors listed in flags have an effect similar to installing default handlers for the widget’s drag-and-drop signals (Gtk.Widget ::drag-motion, Gtk.Widget ::drag-drop, ...). They all exist for convenience. When passing Gtk.DestDefaults.ALL for instance it is sufficient to connect to the widget’s Gtk.Widget ::drag-data-received signal to get primitive, but consistent drag-and-drop support.

Things become more complicated when you try to preview the dragged data, as described in the documentation for Gtk.Widget ::drag-motion. The default behaviors described by flags make some assumptions, that can conflict with your own signal handlers. For instance Gtk.DestDefaults.DROP causes invokations of Gdk.drag_status() in the context of Gtk.Widget ::drag-motion, and invokations of Gtk.drag_finish() in Gtk.Widget ::drag-data-received. Especially the later is dramatic, when your own Gtk.Widget ::drag-motion handler calls Gtk.Widget.drag_get_data() to inspect the dragged data.

There’s no way to set a default action here, you can use the Gtk.Widget ::drag-motion callback for that. Here’s an example which selects the action to use depending on whether the control key is pressed or not:

static void
drag_motion (GtkWidget *widget,
             GdkDragContext *context,
             gint x,
             gint y,
             guint time)
{
  GdkModifierType mask;

  gdk_window_get_pointer (gtk_widget_get_window (widget),
                          NULL, NULL, &mask);
  if (mask & GDK_CONTROL_MASK)
    gdk_drag_status (context, GDK_ACTION_COPY, time);
  else
    gdk_drag_status (context, GDK_ACTION_MOVE, time);
}

drag_dest_set_proxy(proxy_window, protocol, use_coordinates)

Parameters:

• proxy_window (Gdk.Window) – the window to which to forward drag events
• protocol (Gdk.DragProtocol) – the drag protocol which the proxy_window accepts (You can use gdk_drag_get_protocol() to determine this)
• use_coordinates (bool) – If True, send the same coordinates to the destination, because it is an embedded subwindow.

Sets this widget as a proxy for drops to another window.

Deprecated since version 3.22.

drag_dest_set_target_list(target_list)

Parameters:target_list (Gtk.TargetList or None) – list of droppable targets, or None for none

Sets the target types that this widget can accept from drag-and-drop. The widget must first be made into a drag destination with Gtk.Widget.drag_dest_set().

drag_dest_set_track_motion(track_motion)

Parameters:track_motion (bool) – whether to accept all targets

Tells the widget to emit Gtk.Widget ::drag-motion and Gtk.Widget ::drag-leave events regardless of the targets and the Gtk.DestDefaults.MOTION flag.

This may be used when a widget wants to do generic actions regardless of the targets that the source offers.

New in version 2.10.

drag_dest_unset()

Clears information about a drop destination set with Gtk.Widget.drag_dest_set(). The widget will no longer receive notification of drags.

drag_get_data(context, target, time_)

Parameters:

• context (Gdk.DragContext) – the drag context
• target (Gdk.Atom) – the target (form of the data) to retrieve
• time (int) – a timestamp for retrieving the data. This will generally be the time received in a Gtk.Widget ::drag-motion or Gtk.Widget ::drag-drop signal

Gets the data associated with a drag. When the data is received or the retrieval fails, GTK+ will emit a Gtk.Widget ::drag-data-received signal. Failure of the retrieval is indicated by the length field of the selection_data signal parameter being negative. However, when Gtk.Widget.drag_get_data() is called implicitely because the Gtk.DestDefaults.DROP was set, then the widget will not receive notification of failed drops.

drag_highlight()

Highlights a widget as a currently hovered drop target. To end the highlight, call Gtk.Widget.drag_unhighlight(). GTK+ calls this automatically if Gtk.DestDefaults.HIGHLIGHT is set.

drag_source_add_image_targets()

Add the writable image targets supported by Gtk.SelectionData to the target list of the drag source. The targets are added with info = 0. If you need another value, use Gtk.TargetList.add_image_targets() and Gtk.Widget.drag_source_set_target_list().

New in version 2.6.

drag_source_add_text_targets()

Add the text targets supported by Gtk.SelectionData to the target list of the drag source. The targets are added with info = 0. If you need another value, use Gtk.TargetList.add_text_targets() and Gtk.Widget.drag_source_set_target_list().

New in version 2.6.

drag_source_add_uri_targets()

Add the URI targets supported by Gtk.SelectionData to the target list of the drag source. The targets are added with info = 0. If you need another value, use Gtk.TargetList.add_uri_targets() and Gtk.Widget.drag_source_set_target_list().

New in version 2.6.

drag_source_get_target_list()

Returns:the Gtk.TargetList, or None if none Return type:Gtk.TargetList or None

Gets the list of targets this widget can provide for drag-and-drop.

New in version 2.4.

drag_source_set(start_button_mask, targets, actions)

Parameters:

• start_button_mask (Gdk.ModifierType) – the bitmask of buttons that can start the drag
• targets ([Gtk.TargetEntry] or None) – the table of targets that the drag will support, may be None
• actions (Gdk.DragAction) – the bitmask of possible actions for a drag from this widget

Sets up a widget so that GTK+ will start a drag operation when the user clicks and drags on the widget. The widget must have a window.

drag_source_set_icon_gicon(icon)

Parameters:icon (Gio.Icon) – A Gio.Icon

Sets the icon that will be used for drags from a particular source to icon. See the docs for Gtk.IconTheme for more details.

New in version 3.2.

drag_source_set_icon_name(icon_name)

Parameters:icon_name (str) – name of icon to use

Sets the icon that will be used for drags from a particular source to a themed icon. See the docs for Gtk.IconTheme for more details.

New in version 2.8.

drag_source_set_icon_pixbuf(pixbuf)

Parameters:pixbuf (GdkPixbuf.Pixbuf) – the GdkPixbuf.Pixbuf for the drag icon

Sets the icon that will be used for drags from a particular widget from a GdkPixbuf.Pixbuf. GTK+ retains a reference for pixbuf and will release it when it is no longer needed.

drag_source_set_icon_stock(stock_id)

Parameters:stock_id (str) – the ID of the stock icon to use

Sets the icon that will be used for drags from a particular source to a stock icon.

Deprecated since version 3.10: Use Gtk.Widget.drag_source_set_icon_name() instead.

drag_source_set_target_list(target_list)

Parameters:target_list (Gtk.TargetList or None) – list of draggable targets, or None for none

Changes the target types that this widget offers for drag-and-drop. The widget must first be made into a drag source with Gtk.Widget.drag_source_set().

New in version 2.4.

drag_source_unset()

Undoes the effects of Gtk.Widget.drag_source_set().

drag_unhighlight()

Removes a highlight set by Gtk.Widget.drag_highlight() from a widget.

draw(cr)

Parameters:cr (cairo.Context) – a cairo context to draw to

Draws self to cr. The top left corner of the widget will be drawn to the currently set origin point of cr.

You should pass a cairo context as cr argument that is in an original state. Otherwise the resulting drawing is undefined. For example changing the operator using cairo.Context.set_operator() or the line width using cairo.Context.set_line_width() might have unwanted side effects. You may however change the context’s transform matrix - like with cairo.Context.scale(), cairo.Context.translate() or cairo.Context.set_matrix() and clip region with cairo.Context.clip() prior to calling this function. Also, it is fine to modify the context with cairo.Context.save() and cairo.Context.push_group() prior to calling this function.

Note that special-purpose widgets may contain special code for rendering to the screen and might appear differently on screen and when rendered using Gtk.Widget.draw().

New in version 3.0.

ensure_style()

Ensures that self has a style (self->style).

Not a very useful function; most of the time, if you want the style, the widget is realized, and realized widgets are guaranteed to have a style already.

Deprecated since version 3.0: Use Gtk.StyleContext instead

error_bell()

Notifies the user about an input-related error on this widget. If the Gtk.Settings :gtk-error-bell setting is True, it calls Gdk.Window.beep(), otherwise it does nothing.

Note that the effect of Gdk.Window.beep() can be configured in many ways, depending on the windowing backend and the desktop environment or window manager that is used.

New in version 2.12.

event(event)

Parameters:event (Gdk.Event) – a Gdk.Event Returns:return from the event signal emission (True if the event was handled) Return type:bool

Rarely-used function. This function is used to emit the event signals on a widget (those signals should never be emitted without using this function to do so). If you want to synthesize an event though, don’t use this function; instead, use Gtk.main_do_event() so the event will behave as if it were in the event queue. Don’t synthesize expose events; instead, use Gdk.Window.invalidate_rect() to invalidate a region of the window.

freeze_child_notify()

Stops emission of Gtk.Widget ::child-notify signals on self. The signals are queued until Gtk.Widget.thaw_child_notify() is called on self.

This is the analogue of GObject.Object.freeze_notify() for child properties.

get_accessible()

Returns:the Atk.Object associated with self Return type:Atk.Object

Returns the accessible object that describes the widget to an assistive technology.

If accessibility support is not available, this Atk.Object instance may be a no-op. Likewise, if no class-specific Atk.Object implementation is available for the widget instance in question, it will inherit an Atk.Object implementation from the first ancestor class for which such an implementation is defined.

The documentation of the ATK library contains more information about accessible objects and their uses.

get_action_group(prefix)

Parameters:prefix (str) – The “prefix” of the action group. Returns:A Gio.ActionGroup or None. Return type:Gio.ActionGroup or None

Retrieves the Gio.ActionGroup that was registered using prefix. The resulting Gio.ActionGroup may have been registered to self or any Gtk.Widget in its ancestry.

If no action group was found matching prefix, then None is returned.

New in version 3.16.

get_allocated_baseline()

Returns:the baseline of the self, or -1 if none Return type:int

Returns the baseline that has currently been allocated to self. This function is intended to be used when implementing handlers for the Gtk.Widget ::draw function, and when allocating child widgets in #GtkWidget::size_allocate.

New in version 3.10.

get_allocated_height()

Returns:the height of the self Return type:int

Returns the height that has currently been allocated to self. This function is intended to be used when implementing handlers for the Gtk.Widget ::draw function.

get_allocated_size()

Returns:

allocation:a pointer to a #GtkAllocation to copy to baseline:a pointer to an integer to copy to

Return type:(allocation: Gdk.Rectangle, baseline: int)

Retrieves the widget’s allocated size.

This function returns the last values passed to Gtk.Widget.size_allocate_with_baseline(). The value differs from the size returned in Gtk.Widget.get_allocation() in that functions like Gtk.Widget.set_halign() can adjust the allocation, but not the value returned by this function.

If a widget is not visible, its allocated size is 0.

New in version 3.20.

get_allocated_width()

Returns:the width of the self Return type:int

Returns the width that has currently been allocated to self. This function is intended to be used when implementing handlers for the Gtk.Widget ::draw function.

get_allocation()

Returns:a pointer to a #GtkAllocation to copy to Return type:allocation: Gdk.Rectangle

Retrieves the widget’s allocation.

Note, when implementing a Gtk.Container: a widget’s allocation will be its “adjusted” allocation, that is, the widget’s parent container typically calls Gtk.Widget.size_allocate() with an allocation, and that allocation is then adjusted (to handle margin and alignment for example) before assignment to the widget. Gtk.Widget.get_allocation() returns the adjusted allocation that was actually assigned to the widget. The adjusted allocation is guaranteed to be completely contained within the Gtk.Widget.size_allocate() allocation, however. So a Gtk.Container is guaranteed that its children stay inside the assigned bounds, but not that they have exactly the bounds the container assigned. There is no way to get the original allocation assigned by Gtk.Widget.size_allocate(), since it isn’t stored; if a container implementation needs that information it will have to track it itself.

New in version 2.18.

get_ancestor(widget_type)

Parameters:widget_type (GObject.GType) – ancestor type Returns:the ancestor widget, or None if not found Return type:Gtk.Widget or None

Gets the first ancestor of self with type widget_type. For example, gtk_widget_get_ancestor (widget, GTK_TYPE_BOX) gets the first Gtk.Box that’s an ancestor of self. No reference will be added to the returned widget; it should not be unreferenced. See note about checking for a toplevel Gtk.Window in the docs for Gtk.Widget.get_toplevel().

Note that unlike Gtk.Widget.is_ancestor(), Gtk.Widget.get_ancestor() considers self to be an ancestor of itself.

get_app_paintable()

Returns:True if the widget is app paintable Return type:bool

Determines whether the application intends to draw on the widget in an Gtk.Widget ::draw handler.

See Gtk.Widget.set_app_paintable()

New in version 2.18.

get_can_default()

Returns:True if self can be a default widget, False otherwise Return type:bool

Determines whether self can be a default widget. See Gtk.Widget.set_can_default().

New in version 2.18.

get_can_focus()

Returns:True if self can own the input focus, False otherwise Return type:bool

Determines whether self can own the input focus. See Gtk.Widget.set_can_focus().

New in version 2.18.

get_child_requisition()

Returns:a Gtk.Requisition to be filled in Return type:requisition: Gtk.Requisition

This function is only for use in widget implementations. Obtains self->requisition, unless someone has forced a particular geometry on the widget (e.g. with Gtk.Widget.set_size_request()), in which case it returns that geometry instead of the widget’s requisition.

This function differs from Gtk.Widget.size_request() in that it retrieves the last size request value from self->requisition, while Gtk.Widget.size_request() actually calls the “size_request” method on self to compute the size request and fill in self->requisition, and only then returns self->requisition.

Because this function does not call the “size_request” method, it can only be used when you know that self->requisition is up-to-date, that is, Gtk.Widget.size_request() has been called since the last time a resize was queued. In general, only container implementations have this information; applications should use Gtk.Widget.size_request().

Deprecated since version 3.0: Use Gtk.Widget.get_preferred_size() instead.

get_child_visible()

Returns:True if the widget is mapped with the parent. Return type:bool

Gets the value set with Gtk.Widget.set_child_visible(). If you feel a need to use this function, your code probably needs reorganization.

This function is only useful for container implementations and never should be called by an application.

get_clip()

Returns:a pointer to a #GtkAllocation to copy to Return type:clip: Gdk.Rectangle

Retrieves the widget’s clip area.

The clip area is the area in which all of self‘s drawing will happen. Other toolkits call it the bounding box.

Historically, in GTK+ the clip area has been equal to the allocation retrieved via Gtk.Widget.get_allocation().

New in version 3.14.

get_clipboard(selection)

Parameters:selection (Gdk.Atom) – a Gdk.Atom which identifies the clipboard to use. %GDK_SELECTION_CLIPBOARD gives the default clipboard. Another common value is %GDK_SELECTION_PRIMARY, which gives the primary X selection. Returns:the appropriate clipboard object. If no clipboard already exists, a new one will be created. Once a clipboard object has been created, it is persistent for all time. Return type:Gtk.Clipboard

Returns the clipboard object for the given selection to be used with self. self must have a Gdk.Display associated with it, so must be attached to a toplevel window.

New in version 2.2.

get_composite_name()

Returns:the composite name of self, or None if self is not a composite child. The string should be freed when it is no longer needed. Return type:str

Obtains the composite name of a widget.

Deprecated since version 3.10: Use Gtk.WidgetClass.set_template(), or don’t use this API at all.

get_device_enabled(device)

Parameters:device (Gdk.Device) – a Gdk.Device Returns:True is device is enabled for self Return type:bool

Returns whether device can interact with self and its children. See Gtk.Widget.set_device_enabled().

New in version 3.0.

get_device_events(device)

Parameters:device (Gdk.Device) – a Gdk.Device Returns:device event mask for self Return type:Gdk.EventMask

Returns the events mask for the widget corresponding to an specific device. These are the events that the widget will receive when device operates on it.

New in version 3.0.

get_direction()

Returns:the reading direction for the widget. Return type:Gtk.TextDirection

Gets the reading direction for a particular widget. See Gtk.Widget.set_direction().

get_display()

Returns:the Gdk.Display for the toplevel for this widget. Return type:Gdk.Display

Get the Gdk.Display for the toplevel window associated with this widget. This function can only be called after the widget has been added to a widget hierarchy with a Gtk.Window at the top.

In general, you should only create display specific resources when a widget has been realized, and you should free those resources when the widget is unrealized.

New in version 2.2.

get_double_buffered()

Returns:True if the widget is double buffered Return type:bool

Determines whether the widget is double buffered.

See Gtk.Widget.set_double_buffered()

New in version 2.18.

get_events()

Returns:event mask for self Return type:int

Returns the event mask (see Gdk.EventMask) for the widget. These are the events that the widget will receive.

Note: Internally, the widget event mask will be the logical OR of the event mask set through Gtk.Widget.set_events() or Gtk.Widget.add_events(), and the event mask necessary to cater for every Gtk.EventController created for the widget.

get_focus_on_click()

Returns:True if the widget should grab focus when it is clicked with the mouse. Return type:bool

Returns whether the widget should grab focus when it is clicked with the mouse. See Gtk.Widget.set_focus_on_click().

New in version 3.20.

get_font_map()

Returns:A Pango.FontMap, or None Return type:Pango.FontMap or None

Gets the font map that has been set with Gtk.Widget.set_font_map().

New in version 3.18.

get_font_options()

Returns:the cairo.FontOptions or None if not set Return type:cairo.FontOptions or None

Returns the cairo.FontOptions used for Pango rendering. When not set, the defaults font options for the Gdk.Screen will be used.

New in version 3.18.

get_frame_clock()

Returns:a Gdk.FrameClock, or None if widget is unrealized Return type:Gdk.FrameClock or None

Obtains the frame clock for a widget. The frame clock is a global “ticker” that can be used to drive animations and repaints. The most common reason to get the frame clock is to call Gdk.FrameClock.get_frame_time(), in order to get a time to use for animating. For example you might record the start of the animation with an initial value from Gdk.FrameClock.get_frame_time(), and then update the animation by calling Gdk.FrameClock.get_frame_time() again during each repaint.

Gdk.FrameClock.request_phase() will result in a new frame on the clock, but won’t necessarily repaint any widgets. To repaint a widget, you have to use Gtk.Widget.queue_draw() which invalidates the widget (thus scheduling it to receive a draw on the next frame). Gtk.Widget.queue_draw() will also end up requesting a frame on the appropriate frame clock.

A widget’s frame clock will not change while the widget is mapped. Reparenting a widget (which implies a temporary unmap) can change the widget’s frame clock.

Unrealized widgets do not have a frame clock.

New in version 3.8.

get_halign()

Returns:the horizontal alignment of self Return type:Gtk.Align

Gets the value of the Gtk.Widget :halign property.

For backwards compatibility reasons this method will never return Gtk.Align.BASELINE, but instead it will convert it to Gtk.Align.FILL. Baselines are not supported for horizontal alignment.

get_has_tooltip()

Returns:current value of has-tooltip on self. Return type:bool

Returns the current value of the has-tooltip property. See Gtk.Widget :has-tooltip for more information.

New in version 2.12.

get_has_window()

Returns:True if self has a window, False otherwise Return type:bool

Determines whether self has a Gdk.Window of its own. See Gtk.Widget.set_has_window().

New in version 2.18.

get_hexpand()

Returns:whether hexpand flag is set Return type:bool

Gets whether the widget would like any available extra horizontal space. When a user resizes a Gtk.Window, widgets with expand=:obj:True generally receive the extra space. For example, a list or scrollable area or document in your window would often be set to expand.

Containers should use Gtk.Widget.compute_expand() rather than this function, to see whether a widget, or any of its children, has the expand flag set. If any child of a widget wants to expand, the parent may ask to expand also.

This function only looks at the widget’s own hexpand flag, rather than computing whether the entire widget tree rooted at this widget wants to expand.

get_hexpand_set()

Returns:whether hexpand has been explicitly set Return type:bool

Gets whether Gtk.Widget.set_hexpand() has been used to explicitly set the expand flag on this widget.

If hexpand is set, then it overrides any computed expand value based on child widgets. If hexpand is not set, then the expand value depends on whether any children of the widget would like to expand.

There are few reasons to use this function, but it’s here for completeness and consistency.

get_mapped()

Returns:True if the widget is mapped, False otherwise. Return type:bool

Whether the widget is mapped.

New in version 2.20.

get_margin_bottom()

Returns:The bottom margin of self Return type:int

Gets the value of the Gtk.Widget :margin-bottom property.

New in version 3.0.

get_margin_end()

Returns:The end margin of self Return type:int

Gets the value of the Gtk.Widget :margin-end property.

New in version 3.12.

get_margin_left()

Returns:The left margin of self Return type:int

Gets the value of the Gtk.Widget :margin-left property.

New in version 3.0.

Deprecated since version 3.12: Use Gtk.Widget.get_margin_start() instead.

get_margin_right()

Returns:The right margin of self Return type:int

Gets the value of the Gtk.Widget :margin-right property.

New in version 3.0.

Deprecated since version 3.12: Use Gtk.Widget.get_margin_end() instead.

get_margin_start()

Returns:The start margin of self Return type:int

Gets the value of the Gtk.Widget :margin-start property.

New in version 3.12.

get_margin_top()

Returns:The top margin of self Return type:int

Gets the value of the Gtk.Widget :margin-top property.

New in version 3.0.

get_modifier_mask(intent)

Parameters:intent (Gdk.ModifierIntent) – the use case for the modifier mask Returns:the modifier mask used for intent. Return type:Gdk.ModifierType

Returns the modifier mask the self’s windowing system backend uses for a particular purpose.

See Gdk.Keymap.get_modifier_mask().

New in version 3.4.

get_modifier_style()

Returns:the modifier style for the widget. This rc style is owned by the widget. If you want to keep a pointer to value this around, you must add a refcount using GObject.Object.ref(). Return type:Gtk.RcStyle

Returns the current modifier style for the widget. (As set by Gtk.Widget.modify_style().) If no style has previously set, a new Gtk.RcStyle will be created with all values unset, and set as the modifier style for the widget. If you make changes to this rc style, you must call Gtk.Widget.modify_style(), passing in the returned rc style, to make sure that your changes take effect.

Caution: passing the style back to Gtk.Widget.modify_style() will normally end up destroying it, because Gtk.Widget.modify_style() copies the passed-in style and sets the copy as the new modifier style, thus dropping any reference to the old modifier style. Add a reference to the modifier style if you want to keep it alive.

Deprecated since version 3.0: Use Gtk.StyleContext with a custom Gtk.StyleProvider instead

get_name()

Returns:name of the widget. This string is owned by GTK+ and should not be modified or freed Return type:str

Retrieves the name of a widget. See Gtk.Widget.set_name() for the significance of widget names.

get_no_show_all()

Returns:the current value of the “no-show-all” property. Return type:bool

Returns the current value of the Gtk.Widget :no-show-all property, which determines whether calls to Gtk.Widget.show_all() will affect this widget.

New in version 2.4.

get_opacity()

Returns:the requested opacity for this widget. Return type:float

Fetches the requested opacity for this widget. See Gtk.Widget.set_opacity().

New in version 3.8.

get_pango_context()

Returns:the Pango.Context for the widget. Return type:Pango.Context

Gets a Pango.Context with the appropriate font map, font description, and base direction for this widget. Unlike the context returned by Gtk.Widget.create_pango_context(), this context is owned by the widget (it can be used until the screen for the widget changes or the widget is removed from its toplevel), and will be updated to match any changes to the widget’s attributes. This can be tracked by using the Gtk.Widget ::screen-changed signal on the widget.

get_parent()

Returns:the parent container of self, or None Return type:Gtk.Widget or None

Returns the parent container of self.

get_parent_window()

Returns:the parent window of self, or None if it does not have a parent window. Return type:Gdk.Window or None

Gets self’s parent window, or None if it does not have one.

get_path()

Returns:The Gtk.WidgetPath representing self Return type:Gtk.WidgetPath

Returns the Gtk.WidgetPath representing self, if the widget is not connected to a toplevel widget, a partial path will be created.

get_pointer()

Returns:

x:return location for the X coordinate, or None y:return location for the Y coordinate, or None

Return type:(x: int, y: int)

Obtains the location of the mouse pointer in widget coordinates. Widget coordinates are a bit odd; for historical reasons, they are defined as self->window coordinates for widgets that return True for Gtk.Widget.get_has_window(); and are relative to self->allocation.x, self->allocation.y otherwise.

Deprecated since version 3.4: Use Gdk.Window.get_device_position() instead.

get_preferred_height()

Returns:

minimum_height:location to store the minimum height, or None natural_height:location to store the natural height, or None

Return type:(minimum_height: int, natural_height: int)

Retrieves a widget’s initial minimum and natural height.

This call is specific to width-for-height requests.

The returned request will be modified by the GtkWidgetClass::adjust_size_request virtual method and by any Gtk.SizeGroups that have been applied. That is, the returned request is the one that should be used for layout, not necessarily the one returned by the widget itself.

New in version 3.0.

get_preferred_height_and_baseline_for_width(width)

Parameters:width (int) – the width which is available for allocation, or -1 if none Returns:

minimum_height:location for storing the minimum height, or None natural_height:location for storing the natural height, or None minimum_baseline:  location for storing the baseline for the minimum height, or None natural_baseline:  location for storing the baseline for the natural height, or None

Return type:(minimum_height: int, natural_height: int, minimum_baseline: int, natural_baseline: int)

Retrieves a widget’s minimum and natural height and the corresponding baselines if it would be given the specified width, or the default height if width is -1. The baselines may be -1 which means that no baseline is requested for this widget.

The returned request will be modified by the GtkWidgetClass::adjust_size_request and GtkWidgetClass::adjust_baseline_request virtual methods and by any Gtk.SizeGroups that have been applied. That is, the returned request is the one that should be used for layout, not necessarily the one returned by the widget itself.

New in version 3.10.

get_preferred_height_for_width(width)

Parameters:width (int) – the width which is available for allocation Returns:

minimum_height:location for storing the minimum height, or None natural_height:location for storing the natural height, or None

Return type:(minimum_height: int, natural_height: int)

Retrieves a widget’s minimum and natural height if it would be given the specified width.

The returned request will be modified by the GtkWidgetClass::adjust_size_request virtual method and by any Gtk.SizeGroups that have been applied. That is, the returned request is the one that should be used for layout, not necessarily the one returned by the widget itself.

New in version 3.0.

get_preferred_size()

Returns:

minimum_size:location for storing the minimum size, or None natural_size:location for storing the natural size, or None

Return type:(minimum_size: Gtk.Requisition, natural_size: Gtk.Requisition)

Retrieves the minimum and natural size of a widget, taking into account the widget’s preference for height-for-width management.

This is used to retrieve a suitable size by container widgets which do not impose any restrictions on the child placement. It can be used to deduce toplevel window and menu sizes as well as child widgets in free-form containers such as Gtk.Layout.

Handle with care. Note that the natural height of a height-for-width widget will generally be a smaller size than the minimum height, since the required height for the natural width is generally smaller than the required height for the minimum width.

Use Gtk.Widget.get_preferred_height_and_baseline_for_width() if you want to support baseline alignment.

New in version 3.0.

get_preferred_width()

Returns:

minimum_width:location to store the minimum width, or None natural_width:location to store the natural width, or None

Return type:(minimum_width: int, natural_width: int)

Retrieves a widget’s initial minimum and natural width.

This call is specific to height-for-width requests.

The returned request will be modified by the GtkWidgetClass::adjust_size_request virtual method and by any Gtk.SizeGroups that have been applied. That is, the returned request is the one that should be used for layout, not necessarily the one returned by the widget itself.

New in version 3.0.

get_preferred_width_for_height(height)

Parameters:height (int) – the height which is available for allocation Returns:

minimum_width:location for storing the minimum width, or None natural_width:location for storing the natural width, or None

Return type:(minimum_width: int, natural_width: int)

Retrieves a widget’s minimum and natural width if it would be given the specified height.

The returned request will be modified by the GtkWidgetClass::adjust_size_request virtual method and by any Gtk.SizeGroups that have been applied. That is, the returned request is the one that should be used for layout, not necessarily the one returned by the widget itself.

New in version 3.0.

get_realized()

Returns:True if self is realized, False otherwise Return type:bool

Determines whether self is realized.

New in version 2.20.

get_receives_default()

Returns:True if self acts as the default widget when focused, False otherwise Return type:bool

Determines whether self is always treated as the default widget within its toplevel when it has the focus, even if another widget is the default.

See Gtk.Widget.set_receives_default().

New in version 2.18.

get_request_mode()

Returns:The Gtk.SizeRequestMode preferred by self. Return type:Gtk.SizeRequestMode

Gets whether the widget prefers a height-for-width layout or a width-for-height layout.

Gtk.Bin widgets generally propagate the preference of their child, container widgets need to request something either in context of their children or in context of their allocation capabilities.

New in version 3.0.

get_requisition()

Returns:a pointer to a Gtk.Requisition to copy to Return type:requisition: Gtk.Requisition

Retrieves the widget’s requisition.

This function should only be used by widget implementations in order to figure whether the widget’s requisition has actually changed after some internal state change (so that they can call Gtk.Widget.queue_resize() instead of Gtk.Widget.queue_draw()).

Normally, Gtk.Widget.size_request() should be used.

New in version 2.20.

Deprecated since version 3.0: The Gtk.Requisition cache on the widget was removed, If you need to cache sizes across requests and allocations, add an explicit cache to the widget in question instead.

get_root_window()

Returns:the Gdk.Window root window for the toplevel for this widget. Return type:Gdk.Window

Get the root window where this widget is located. This function can only be called after the widget has been added to a widget hierarchy with Gtk.Window at the top.

The root window is useful for such purposes as creating a popup Gdk.Window associated with the window. In general, you should only create display specific resources when a widget has been realized, and you should free those resources when the widget is unrealized.

New in version 2.2.

Deprecated since version 3.12: Use Gdk.Screen.get_root_window() instead

get_scale_factor()

Returns:the scale factor for self Return type:int

Retrieves the internal scale factor that maps from window coordinates to the actual device pixels. On traditional systems this is 1, on high density outputs, it can be a higher value (typically 2).

See Gdk.Window.get_scale_factor().

New in version 3.10.

get_screen()

Returns:the Gdk.Screen for the toplevel for this widget. Return type:Gdk.Screen

Get the Gdk.Screen from the toplevel window associated with this widget. This function can only be called after the widget has been added to a widget hierarchy with a Gtk.Window at the top.

In general, you should only create screen specific resources when a widget has been realized, and you should free those resources when the widget is unrealized.

New in version 2.2.

get_sensitive()

Returns:True if the widget is sensitive Return type:bool

Returns the widget’s sensitivity (in the sense of returning the value that has been set using Gtk.Widget.set_sensitive()).

The effective sensitivity of a widget is however determined by both its own and its parent widget’s sensitivity. See Gtk.Widget.is_sensitive().

New in version 2.18.

get_settings()

Returns:the relevant Gtk.Settings object Return type:Gtk.Settings

Gets the settings object holding the settings used for this widget.

Note that this function can only be called when the Gtk.Widget is attached to a toplevel, since the settings object is specific to a particular Gdk.Screen.

get_size_request()

Returns:

width:return location for width, or None height:return location for height, or None

Return type:(width: int, height: int)

Gets the size request that was explicitly set for the widget using Gtk.Widget.set_size_request(). A value of -1 stored in width or height indicates that that dimension has not been set explicitly and the natural requisition of the widget will be used instead. See Gtk.Widget.set_size_request(). To get the size a widget will actually request, call Gtk.Widget.get_preferred_size() instead of this function.

get_state()

Returns:the state of self. Return type:Gtk.StateType

Returns the widget’s state. See Gtk.Widget.set_state().

New in version 2.18.

Deprecated since version 3.0: Use Gtk.Widget.get_state_flags() instead.

get_state_flags()

Returns:The state flags for widget Return type:Gtk.StateFlags

Returns the widget state as a flag set. It is worth mentioning that the effective Gtk.StateFlags.INSENSITIVE state will be returned, that is, also based on parent insensitivity, even if self itself is sensitive.

Also note that if you are looking for a way to obtain the Gtk.StateFlags to pass to a Gtk.StyleContext method, you should look at Gtk.StyleContext.get_state().

New in version 3.0.

get_style()

Returns:the widget’s Gtk.Style Return type:Gtk.Style

Simply an accessor function that returns self->style.

Deprecated since version 3.0: Use Gtk.StyleContext instead

get_style_context()

Returns:a Gtk.StyleContext. This memory is owned by self and must not be freed. Return type:Gtk.StyleContext

Returns the style context associated to self. The returned object is guaranteed to be the same for the lifetime of self.

get_support_multidevice()

Returns:True if self is multidevice aware. Return type:bool

Returns True if self is multiple pointer aware. See Gtk.Widget.set_support_multidevice() for more information.

get_template_child(widget_type, name)

Parameters:

• widget_type (GObject.GType) – The GObject.GType to get a template child for
• name (str) – The “id” of the child defined in the template XML

Returns:

The object built in the template XML with the id name

Return type:

GObject.Object

Fetch an object build from the template XML for widget_type in this self instance.

This will only report children which were previously declared with Gtk.WidgetClass.bind_template_child_full() or one of its variants.

This function is only meant to be called for code which is private to the widget_type which declared the child and is meant for language bindings which cannot easily make use of the GObject.Object structure offsets.

get_tooltip_markup()

Returns:the tooltip text, or None. You should free the returned string with GLib.free() when done. Return type:str or None

Gets the contents of the tooltip for self.

New in version 2.12.

get_tooltip_text()

Returns:the tooltip text, or None. You should free the returned string with GLib.free() when done. Return type:str or None

Gets the contents of the tooltip for self.

New in version 2.12.

get_tooltip_window()

Returns:The Gtk.Window of the current tooltip. Return type:Gtk.Window

Returns the Gtk.Window of the current tooltip. This can be the Gtk.Window created by default, or the custom tooltip window set using Gtk.Widget.set_tooltip_window().

New in version 2.12.

get_toplevel()

Returns:the topmost ancestor of self, or self itself if there’s no ancestor. Return type:Gtk.Widget

This function returns the topmost widget in the container hierarchy self is a part of. If self has no parent widgets, it will be returned as the topmost widget. No reference will be added to the returned widget; it should not be unreferenced.

Note the difference in behavior vs. Gtk.Widget.get_ancestor(); gtk_widget_get_ancestor (widget, GTK_TYPE_WINDOW) would return None if self wasn’t inside a toplevel window, and if the window was inside a Gtk.Window-derived widget which was in turn inside the toplevel Gtk.Window. While the second case may seem unlikely, it actually happens when a Gtk.Plug is embedded inside a Gtk.Socket within the same application.

To reliably find the toplevel Gtk.Window, use Gtk.Widget.get_toplevel() and call Gtk.Widget.is_toplevel() on the result.

GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
if (gtk_widget_is_toplevel (toplevel))
  {
    // Perform action on toplevel.
  }

get_valign()

Returns:the vertical alignment of self, ignoring baseline alignment Return type:Gtk.Align

Gets the value of the Gtk.Widget :valign property.

For backwards compatibility reasons this method will never return Gtk.Align.BASELINE, but instead it will convert it to Gtk.Align.FILL. If your widget want to support baseline aligned children it must use Gtk.Widget.get_valign_with_baseline(), or g_object_get (widget, "valign", &value, NULL), which will also report the true value.

get_valign_with_baseline()

Returns:the vertical alignment of self Return type:Gtk.Align

Gets the value of the Gtk.Widget :valign property, including Gtk.Align.BASELINE.

New in version 3.10.

get_vexpand()

Returns:whether vexpand flag is set Return type:bool

Gets whether the widget would like any available extra vertical space.

See Gtk.Widget.get_hexpand() for more detail.

get_vexpand_set()

Returns:whether vexpand has been explicitly set Return type:bool

Gets whether Gtk.Widget.set_vexpand() has been used to explicitly set the expand flag on this widget.

See Gtk.Widget.get_hexpand_set() for more detail.

get_visible()

Returns:True if the widget is visible Return type:bool

Determines whether the widget is visible. If you want to take into account whether the widget’s parent is also marked as visible, use Gtk.Widget.is_visible() instead.

This function does not check if the widget is obscured in any way.

See Gtk.Widget.set_visible().

New in version 2.18.

get_visual()

Returns:the visual for self Return type:Gdk.Visual

Gets the visual that will be used to render self.

get_window()

Returns:self’s window. Return type:Gdk.Window or None

Returns the widget’s window if it is realized, None otherwise

New in version 2.14.

grab_add()

Makes self the current grabbed widget.

This means that interaction with other widgets in the same application is blocked and mouse as well as keyboard events are delivered to this widget.

If self is not sensitive, it is not set as the current grabbed widget and this function does nothing.

grab_default()

Causes self to become the default widget. self must be able to be a default widget; typically you would ensure this yourself by calling Gtk.Widget.set_can_default() with a True value. The default widget is activated when the user presses Enter in a window. Default widgets must be activatable, that is, Gtk.Widget.activate() should affect them. Note that Gtk.Entry widgets require the “activates-default” property set to True before they activate the default widget when Enter is pressed and the Gtk.Entry is focused.

grab_focus()

Causes self to have the keyboard focus for the Gtk.Window it’s inside. self must be a focusable widget, such as a Gtk.Entry; something like Gtk.Frame won’t work.

More precisely, it must have the %GTK_CAN_FOCUS flag set. Use Gtk.Widget.set_can_focus() to modify that flag.

The widget also needs to be realized and mapped. This is indicated by the related signals. Grabbing the focus immediately after creating the widget will likely fail and cause critical warnings.

grab_remove()

Removes the grab from the given widget.

You have to pair calls to Gtk.Widget.grab_add() and Gtk.Widget.grab_remove().

If self does not have the grab, this function does nothing.

has_default()

Returns:True if self is the current default widget within its toplevel, False otherwise Return type:bool

Determines whether self is the current default widget within its toplevel. See Gtk.Widget.set_can_default().

New in version 2.18.

has_focus()

Returns:True if the widget has the global input focus. Return type:bool

Determines if the widget has the global input focus. See Gtk.Widget.is_focus() for the difference between having the global input focus, and only having the focus within a toplevel.

New in version 2.18.

has_grab()

Returns:True if the widget is in the grab_widgets stack Return type:bool

Determines whether the widget is currently grabbing events, so it is the only widget receiving input events (keyboard and mouse).

See also Gtk.Widget.grab_add().

New in version 2.18.

has_rc_style()

Returns:True if the widget has been looked up through the rc mechanism, False otherwise. Return type:bool

Determines if the widget style has been looked up through the rc mechanism.

New in version 2.20.

Deprecated since version 3.0: Use Gtk.StyleContext instead

has_screen()

Returns:True if there is a Gdk.Screen associated with the widget. Return type:bool

Checks whether there is a Gdk.Screen is associated with this widget. All toplevel widgets have an associated screen, and all widgets added into a hierarchy with a toplevel window at the top.

New in version 2.2.

has_visible_focus()

Returns:True if the widget should display a “focus rectangle” Return type:bool

Determines if the widget should show a visible indication that it has the global input focus. This is a convenience function for use in ::draw handlers that takes into account whether focus indication should currently be shown in the toplevel window of self. See Gtk.Window.get_focus_visible() for more information about focus indication.

To find out if the widget has the global input focus, use Gtk.Widget.has_focus().

New in version 3.2.

hide()

Reverses the effects of Gtk.Widget.show(), causing the widget to be hidden (invisible to the user).

hide_on_delete()

Returns:True Return type:bool

Utility function; intended to be connected to the Gtk.Widget ::delete-event signal on a Gtk.Window. The function calls Gtk.Widget.hide() on its argument, then returns True. If connected to ::delete-event, the result is that clicking the close button for a window (on the window frame, top right corner usually) will hide but not destroy the window. By default, GTK+ destroys windows when ::delete-event is received.

in_destruction()

Returns:True if self is being destroyed Return type:bool

Returns whether the widget is currently being destroyed. This information can sometimes be used to avoid doing unnecessary work.

init_template()

Creates and initializes child widgets defined in templates. This function must be called in the instance initializer for any class which assigned itself a template using Gtk.WidgetClass.set_template()

It is important to call this function in the instance initializer of a Gtk.Widget subclass and not in GObject.Object.do_constructed() or GObject.Object.do_constructor() for two reasons.

One reason is that generally derived widgets will assume that parent class composite widgets have been created in their instance initializers.

Another reason is that when calling GObject.Object.new() on a widget with composite templates, it’s important to build the composite widgets before the construct properties are set. Properties passed to GObject.Object.new() should take precedence over properties set in the private template XML.

New in version 3.10.

input_shape_combine_region(region)

Parameters:region (cairo.Region or None) – shape to be added, or None to remove an existing shape

Sets an input shape for this widget’s GDK window. This allows for windows which react to mouse click in a nonrectangular region, see Gdk.Window.input_shape_combine_region() for more information.

New in version 3.0.

insert_action_group(name, group)

Parameters:

• name (str) – the prefix for actions in group
• group (Gio.ActionGroup or None) – a Gio.ActionGroup, or None

Inserts group into self. Children of self that implement Gtk.Actionable can then be associated with actions in group by setting their “action-name” to prefix.``action-name``.

If group is None, a previously inserted group for name is removed from self.

New in version 3.6.

intersect(area)

Parameters:area (Gdk.Rectangle) – a rectangle Returns:True if there was an intersection

intersection:rectangle to store intersection of self and area

Return type:(bool, intersection: Gdk.Rectangle)

Computes the intersection of a self’s area and area, storing the intersection in intersection, and returns True if there was an intersection. intersection may be None if you’re only interested in whether there was an intersection.

is_ancestor(ancestor)

Parameters:ancestor (Gtk.Widget) – another Gtk.Widget Returns:True if ancestor contains self as a child, grandchild, great grandchild, etc. Return type:bool

Determines whether self is somewhere inside ancestor, possibly with intermediate containers.

is_composited()

Returns:True if the widget can rely on its alpha channel being drawn correctly. Return type:bool

Whether self can rely on having its alpha channel drawn correctly. On X11 this function returns whether a compositing manager is running for self’s screen.

Please note that the semantics of this call will change in the future if used on a widget that has a composited window in its hierarchy (as set by Gdk.Window.set_composited()).

New in version 2.10.

Deprecated since version 3.22: Use Gdk.Screen.is_composited() instead.

is_drawable()

Returns:True if self is drawable, False otherwise Return type:bool

Determines whether self can be drawn to. A widget can be drawn to if it is mapped and visible.

New in version 2.18.

is_focus()

Returns:True if the widget is the focus widget. Return type:bool

Determines if the widget is the focus widget within its toplevel. (This does not mean that the Gtk.Widget :has-focus property is necessarily set; Gtk.Widget :has-focus will only be set if the toplevel widget additionally has the global input focus.)

is_sensitive()

Returns:True if the widget is effectively sensitive Return type:bool

Returns the widget’s effective sensitivity, which means it is sensitive itself and also its parent widget is sensitive

New in version 2.18.

is_toplevel()

Returns:True if self is a toplevel, False otherwise Return type:bool

Determines whether self is a toplevel widget.

Currently only Gtk.Window and Gtk.Invisible (and out-of-process Gtk.Plugs) are toplevel widgets. Toplevel widgets have no parent widget.

New in version 2.18.

is_visible()

Returns:True if the widget and all its parents are visible Return type:bool

Determines whether the widget and all its parents are marked as visible.

This function does not check if the widget is obscured in any way.

See also Gtk.Widget.get_visible() and Gtk.Widget.set_visible()

New in version 3.8.

keynav_failed(direction)

Parameters:direction (Gtk.DirectionType) – direction of focus movement Returns:True if stopping keyboard navigation is fine, False if the emitting widget should try to handle the keyboard navigation attempt in its parent container(s). Return type:bool

This function should be called whenever keyboard navigation within a single widget hits a boundary. The function emits the Gtk.Widget ::keynav-failed signal on the widget and its return value should be interpreted in a way similar to the return value of Gtk.Widget.child_focus():

When True is returned, stay in the widget, the failed keyboard navigation is OK and/or there is nowhere we can/should move the focus to.

When False is returned, the caller should continue with keyboard navigation outside the widget, e.g. by calling Gtk.Widget.child_focus() on the widget’s toplevel.

The default ::keynav-failed handler returns True for Gtk.DirectionType.TAB_FORWARD and Gtk.DirectionType.TAB_BACKWARD. For the other values of Gtk.DirectionType it returns False.

Whenever the default handler returns True, it also calls Gtk.Widget.error_bell() to notify the user of the failed keyboard navigation.

A use case for providing an own implementation of ::keynav-failed (either by connecting to it or by overriding it) would be a row of Gtk.Entry widgets where the user should be able to navigate the entire row with the cursor keys, as e.g. known from user interfaces that require entering license keys.

New in version 2.12.

list_accel_closures()

Returns:a newly allocated GLib.List of closures Return type:[GObject.Closure]

Lists the closures used by self for accelerator group connections with Gtk.AccelGroup.connect_by_path() or Gtk.AccelGroup.connect(). The closures can be used to monitor accelerator changes on self, by connecting to the GtkAccelGroup::accel-changed signal of the Gtk.AccelGroup of a closure which can be found out with Gtk.AccelGroup.from_accel_closure().

list_action_prefixes()

Returns:a None-terminated array of strings. Return type:[str]

Retrieves a None-terminated array of strings containing the prefixes of Gio.ActionGroup‘s available to self.

New in version 3.16.

list_mnemonic_labels()

Returns:the list of mnemonic labels; free this list with g_list_free() when you are done with it. Return type:[Gtk.Widget]

Returns a newly allocated list of the widgets, normally labels, for which this widget is the target of a mnemonic (see for example, Gtk.Label.set_mnemonic_widget()).

The widgets in the list are not individually referenced. If you want to iterate through the list and perform actions involving callbacks that might destroy the widgets, you must call g_list_foreach (result, (GFunc)g_object_ref, NULL) first, and then unref all the widgets afterwards.

New in version 2.4.

map()

This function is only for use in widget implementations. Causes a widget to be mapped if it isn’t already.

mnemonic_activate(group_cycling)

Parameters:group_cycling (bool) – True if there are other widgets with the same mnemonic Returns:True if the signal has been handled Return type:bool

Emits the Gtk.Widget ::mnemonic-activate signal.

modify_base(state, color)

Parameters:

• state (Gtk.StateType) – the state for which to set the base color
• color (Gdk.Color or None) – the color to assign (does not need to be allocated), or None to undo the effect of previous calls to of Gtk.Widget.modify_base().

Sets the base color for a widget in a particular state. All other style values are left untouched. The base color is the background color used along with the text color (see Gtk.Widget.modify_text()) for widgets such as Gtk.Entry and Gtk.TextView. See also Gtk.Widget.modify_style().

Note that “no window” widgets (which have the %GTK_NO_WINDOW flag set) draw on their parent container’s window and thus may not draw any background themselves. This is the case for e.g. Gtk.Label.

To modify the background of such widgets, you have to set the base color on their parent; if you want to set the background of a rectangular area around a label, try placing the label in a Gtk.EventBox widget and setting the base color on that.

Deprecated since version 3.0: Use Gtk.Widget.override_background_color() instead

modify_bg(state, color)

Parameters:

• state (Gtk.StateType) – the state for which to set the background color
• color (Gdk.Color or None) – the color to assign (does not need to be allocated), or None to undo the effect of previous calls to of Gtk.Widget.modify_bg().

Sets the background color for a widget in a particular state.

All other style values are left untouched. See also Gtk.Widget.modify_style().

Note that “no window” widgets (which have the %GTK_NO_WINDOW flag set) draw on their parent container’s window and thus may not draw any background themselves. This is the case for e.g. Gtk.Label.

To modify the background of such widgets, you have to set the background color on their parent; if you want to set the background of a rectangular area around a label, try placing the label in a Gtk.EventBox widget and setting the background color on that.

Deprecated since version 3.0: Use Gtk.Widget.override_background_color() instead

modify_cursor(primary, secondary)

Parameters:

• primary (Gdk.Color or None) – the color to use for primary cursor (does not need to be allocated), or None to undo the effect of previous calls to of Gtk.Widget.modify_cursor().
• secondary (Gdk.Color or None) – the color to use for secondary cursor (does not need to be allocated), or None to undo the effect of previous calls to of Gtk.Widget.modify_cursor().

Sets the cursor color to use in a widget, overriding the Gtk.Widget cursor-color and secondary-cursor-color style properties.

All other style values are left untouched. See also Gtk.Widget.modify_style().

New in version 2.12.

Deprecated since version 3.0: Use Gtk.Widget.override_cursor() instead.

modify_fg(state, color)

Parameters:

• state (Gtk.StateType) – the state for which to set the foreground color
• color (Gdk.Color or None) – the color to assign (does not need to be allocated), or None to undo the effect of previous calls to of Gtk.Widget.modify_fg().

Sets the foreground color for a widget in a particular state.

All other style values are left untouched. See also Gtk.Widget.modify_style().

Deprecated since version 3.0: Use Gtk.Widget.override_color() instead

modify_font(font_desc)

Parameters:font_desc (Pango.FontDescription or None) – the font description to use, or None to undo the effect of previous calls to Gtk.Widget.modify_font()

Sets the font to use for a widget.

All other style values are left untouched. See also Gtk.Widget.modify_style().

Deprecated since version 3.0: Use Gtk.Widget.override_font() instead

modify_style(style)

Parameters:style (Gtk.RcStyle) – the Gtk.RcStyle-struct holding the style modifications

Modifies style values on the widget.

Modifications made using this technique take precedence over style values set via an RC file, however, they will be overridden if a style is explicitly set on the widget using Gtk.Widget.set_style(). The Gtk.RcStyle-struct is designed so each field can either be set or unset, so it is possible, using this function, to modify some style values and leave the others unchanged.

Note that modifications made with this function are not cumulative with previous calls to Gtk.Widget.modify_style() or with such functions as Gtk.Widget.modify_fg(). If you wish to retain previous values, you must first call Gtk.Widget.get_modifier_style(), make your modifications to the returned style, then call Gtk.Widget.modify_style() with that style. On the other hand, if you first call Gtk.Widget.modify_style(), subsequent calls to such functions Gtk.Widget.modify_fg() will have a cumulative effect with the initial modifications.

Deprecated since version 3.0: Use Gtk.StyleContext with a custom Gtk.StyleProvider instead

modify_text(state, color)

Parameters:

• state (Gtk.StateType) – the state for which to set the text color
• color (Gdk.Color or None) – the color to assign (does not need to be allocated), or None to undo the effect of previous calls to of Gtk.Widget.modify_text().

Sets the text color for a widget in a particular state.

All other style values are left untouched. The text color is the foreground color used along with the base color (see Gtk.Widget.modify_base()) for widgets such as Gtk.Entry and Gtk.TextView. See also Gtk.Widget.modify_style().

Deprecated since version 3.0: Use Gtk.Widget.override_color() instead

override_background_color(state, color)

Parameters:

• state (Gtk.StateFlags) – the state for which to set the background color
• color (Gdk.RGBA or None) – the color to assign, or None to undo the effect of previous calls to Gtk.Widget.override_background_color()

Sets the background color to use for a widget.

All other style values are left untouched. See Gtk.Widget.override_color().

New in version 3.0.

Deprecated since version 3.16: This function is not useful in the context of CSS-based rendering. If you wish to change the way a widget renders its background you should use a custom CSS style, through an application-specific Gtk.StyleProvider and a CSS style class. You can also override the default drawing of a widget through the Gtk.Widget ::draw signal, and use Cairo to draw a specific color, regardless of the CSS style.

override_color(state, color)

Parameters:

• state (Gtk.StateFlags) – the state for which to set the color
• color (Gdk.RGBA or None) – the color to assign, or None to undo the effect of previous calls to Gtk.Widget.override_color()

Sets the color to use for a widget.

All other style values are left untouched.

This function does not act recursively. Setting the color of a container does not affect its children. Note that some widgets that you may not think of as containers, for instance Gtk.Buttons, are actually containers.

This API is mostly meant as a quick way for applications to change a widget appearance. If you are developing a widgets library and intend this change to be themeable, it is better done by setting meaningful CSS classes in your widget/container implementation through Gtk.StyleContext.add_class().

This way, your widget library can install a Gtk.CssProvider with the Gtk.STYLE_PROVIDER_PRIORITY_FALLBACK priority in order to provide a default styling for those widgets that need so, and this theming may fully overridden by the user’s theme.

Note that for complex widgets this may bring in undesired results (such as uniform background color everywhere), in these cases it is better to fully style such widgets through a Gtk.CssProvider with the Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION priority.

New in version 3.0.

Deprecated since version 3.16: Use a custom style provider and style classes instead

override_cursor(cursor, secondary_cursor)

Parameters:

• cursor (Gdk.RGBA or None) – the color to use for primary cursor (does not need to be allocated), or None to undo the effect of previous calls to of Gtk.Widget.override_cursor().
• secondary_cursor (Gdk.RGBA or None) – the color to use for secondary cursor (does not need to be allocated), or None to undo the effect of previous calls to of Gtk.Widget.override_cursor().

Sets the cursor color to use in a widget, overriding the cursor-color and secondary-cursor-color style properties. All other style values are left untouched. See also Gtk.Widget.modify_style().

Note that the underlying properties have the Gdk.Color type, so the alpha value in primary and secondary will be ignored.

New in version 3.0.

Deprecated since version 3.16: This function is not useful in the context of CSS-based rendering. If you wish to change the color used to render the primary and secondary cursors you should use a custom CSS style, through an application-specific Gtk.StyleProvider and a CSS style class.

override_font(font_desc)

Parameters:font_desc (Pango.FontDescription or None) – the font description to use, or None to undo the effect of previous calls to Gtk.Widget.override_font()

Sets the font to use for a widget. All other style values are left untouched. See Gtk.Widget.override_color().

New in version 3.0.

Deprecated since version 3.16: This function is not useful in the context of CSS-based rendering. If you wish to change the font a widget uses to render its text you should use a custom CSS style, through an application-specific Gtk.StyleProvider and a CSS style class.

override_symbolic_color(name, color)

Parameters:

• name (str) – the name of the symbolic color to modify
• color (Gdk.RGBA or None) – the color to assign (does not need to be allocated), or None to undo the effect of previous calls to Gtk.Widget.override_symbolic_color()

Sets a symbolic color for a widget.

All other style values are left untouched. See Gtk.Widget.override_color() for overriding the foreground or background color.

New in version 3.0.

Deprecated since version 3.16: This function is not useful in the context of CSS-based rendering. If you wish to change the color used to render symbolic icons you should use a custom CSS style, through an application-specific Gtk.StyleProvider and a CSS style class.

path()

Returns:

path_length:location to store length of the path, or None path:location to store allocated path string, or None path_reversed:location to store allocated reverse path string, or None

Return type:(path_length: int, path: str, path_reversed: str)

Obtains the full path to self. The path is simply the name of a widget and all its parents in the container hierarchy, separated by periods. The name of a widget comes from Gtk.Widget.get_name(). Paths are used to apply styles to a widget in gtkrc configuration files. Widget names are the type of the widget by default (e.g. “Gtk.Button”) or can be set to an application-specific value with Gtk.Widget.set_name(). By setting the name of a widget, you allow users or theme authors to apply styles to that specific widget in their gtkrc file. path_reversed_p fills in the path in reverse order, i.e. starting with self’s name instead of starting with the name of self’s outermost ancestor.

Deprecated since version 3.0: Use Gtk.Widget.get_path() instead

queue_allocate()

This function is only for use in widget implementations.

Flags the widget for a rerun of the GtkWidgetClass::size_allocate function. Use this function instead of Gtk.Widget.queue_resize() when the self‘s size request didn’t change but it wants to reposition its contents.

An example user of this function is Gtk.Widget.set_halign().

New in version 3.20.

queue_compute_expand()

Mark self as needing to recompute its expand flags. Call this function when setting legacy expand child properties on the child of a container.

See Gtk.Widget.compute_expand().

queue_draw()

Equivalent to calling Gtk.Widget.queue_draw_area() for the entire area of a widget.

queue_draw_area(x, y, width, height)

Parameters:

• x (int) – x coordinate of upper-left corner of rectangle to redraw
• y (int) – y coordinate of upper-left corner of rectangle to redraw
• width (int) – width of region to draw
• height (int) – height of region to draw

Convenience function that calls Gtk.Widget.queue_draw_region() on the region created from the given coordinates.

The region here is specified in widget coordinates. Widget coordinates are a bit odd; for historical reasons, they are defined as self->window coordinates for widgets that return True for Gtk.Widget.get_has_window(), and are relative to self->allocation.x, self->allocation.y otherwise.

width or height may be 0, in this case this function does nothing. Negative values for width and height are not allowed.

queue_draw_region(region)

Parameters:region (cairo.Region) – region to draw

Invalidates the area of self defined by region by calling Gdk.Window.invalidate_region() on the widget’s window and all its child windows. Once the main loop becomes idle (after the current batch of events has been processed, roughly), the window will receive expose events for the union of all regions that have been invalidated.

Normally you would only use this function in widget implementations. You might also use it to schedule a redraw of a Gtk.DrawingArea or some portion thereof.

New in version 3.0.

queue_resize()

This function is only for use in widget implementations. Flags a widget to have its size renegotiated; should be called when a widget for some reason has a new size request. For example, when you change the text in a Gtk.Label, Gtk.Label queues a resize to ensure there’s enough space for the new text.

Note that you cannot call Gtk.Widget.queue_resize() on a widget from inside its implementation of the GtkWidgetClass::size_allocate virtual method. Calls to Gtk.Widget.queue_resize() from inside GtkWidgetClass::size_allocate will be silently ignored.

queue_resize_no_redraw()

This function works like Gtk.Widget.queue_resize(), except that the widget is not invalidated.

New in version 2.4.

realize()

Creates the GDK (windowing system) resources associated with a widget. For example, self->window will be created when a widget is realized. Normally realization happens implicitly; if you show a widget and all its parent containers, then the widget will be realized and mapped automatically.

Realizing a widget requires all the widget’s parent widgets to be realized; calling Gtk.Widget.realize() realizes the widget’s parents in addition to self itself. If a widget is not yet inside a toplevel window when you realize it, bad things will happen.

This function is primarily used in widget implementations, and isn’t very useful otherwise. Many times when you think you might need it, a better approach is to connect to a signal that will be called after the widget is realized automatically, such as Gtk.Widget ::draw. Or simply g_signal_connect () to the Gtk.Widget ::realize signal.

region_intersect(region)

Parameters:region (cairo.Region) – a cairo.Region, in the same coordinate system as self->allocation. That is, relative to self->window for widgets which return False from Gtk.Widget.get_has_window(); relative to the parent window of self->window otherwise. Returns:A newly allocated region holding the intersection of self and region. Return type:cairo.Region

Computes the intersection of a self’s area and region, returning the intersection. The result may be empty, use cairo_region_is_empty() to check.

Deprecated since version 3.14: Use Gtk.Widget.get_allocation() and cairo_region_intersect_rectangle() to get the same behavior.

register_window(window)

Parameters:window (Gdk.Window) – a Gdk.Window

Registers a Gdk.Window with the widget and sets it up so that the widget receives events for it. Call Gtk.Widget.unregister_window() when destroying the window.

Before 3.8 you needed to call Gdk.Window.set_user_data() directly to set this up. This is now deprecated and you should use Gtk.Widget.register_window() instead. Old code will keep working as is, although some new features like transparency might not work perfectly.

New in version 3.8.

remove_accelerator(accel_group, accel_key, accel_mods)

Parameters:

• accel_group (Gtk.AccelGroup) – accel group for this widget
• accel_key (int) – GDK keyval of the accelerator
• accel_mods (Gdk.ModifierType) – modifier key combination of the accelerator

Returns:

whether an accelerator was installed and could be removed

Return type:

bool

Removes an accelerator from self, previously installed with Gtk.Widget.add_accelerator().

remove_mnemonic_label(label)

Parameters:label (Gtk.Widget) – a Gtk.Widget that was previously set as a mnemonic label for self with Gtk.Widget.add_mnemonic_label().

Removes a widget from the list of mnemonic labels for this widget. (See Gtk.Widget.list_mnemonic_labels()). The widget must have previously been added to the list with Gtk.Widget.add_mnemonic_label().

New in version 2.4.

remove_tick_callback(id)

Parameters:id (int) – an id returned by Gtk.Widget.add_tick_callback()

Removes a tick callback previously registered with Gtk.Widget.add_tick_callback().

New in version 3.8.

render_icon(stock_id, size, detail)

Parameters:

• stock_id (str) – a stock ID
• size (int) – a stock size (Gtk.IconSize). A size of (GtkIconSize)-1 means render at the size of the source and don’t scale (if there are multiple source sizes, GTK+ picks one of the available sizes).
• detail (str or None) – render detail to pass to theme engine

Returns:

a new pixbuf, or None if the stock ID wasn’t known

Return type:

GdkPixbuf.Pixbuf or None

A convenience function that uses the theme settings for self to look up stock_id and render it to a pixbuf. stock_id should be a stock icon ID such as Gtk.STOCK_OPEN or Gtk.STOCK_OK. size should be a size such as Gtk.IconSize.MENU. detail should be a string that identifies the widget or code doing the rendering, so that theme engines can special-case rendering for that widget or code.

The pixels in the returned GdkPixbuf.Pixbuf are shared with the rest of the application and should not be modified. The pixbuf should be freed after use with GObject.Object.unref().

Deprecated since version 3.0: Use Gtk.Widget.render_icon_pixbuf() instead.

render_icon_pixbuf(stock_id, size)

Parameters:

• stock_id (str) – a stock ID
• size (int) – a stock size (Gtk.IconSize). A size of (GtkIconSize)-1 means render at the size of the source and don’t scale (if there are multiple source sizes, GTK+ picks one of the available sizes).

Returns:

a new pixbuf, or None if the stock ID wasn’t known

Return type:

GdkPixbuf.Pixbuf or None

A convenience function that uses the theme engine and style settings for self to look up stock_id and render it to a pixbuf. stock_id should be a stock icon ID such as Gtk.STOCK_OPEN or Gtk.STOCK_OK. size should be a size such as Gtk.IconSize.MENU.

The pixels in the returned GdkPixbuf.Pixbuf are shared with the rest of the application and should not be modified. The pixbuf should be freed after use with GObject.Object.unref().

New in version 3.0.

Deprecated since version 3.10: Use Gtk.IconTheme.load_icon() instead.

reparent(new_parent)

Parameters:new_parent (Gtk.Widget) – a Gtk.Container to move the widget into

Moves a widget from one Gtk.Container to another, handling reference count issues to avoid destroying the widget.

Deprecated since version 3.14: Use Gtk.Container.remove() and Gtk.Container.add().

reset_rc_styles()

Reset the styles of self and all descendents, so when they are looked up again, they get the correct values for the currently loaded RC file settings.

This function is not useful for applications.

Deprecated since version 3.0: Use Gtk.StyleContext instead, and Gtk.Widget.reset_style()

reset_style()

Updates the style context of self and all descendants by updating its widget path. Gtk.Containers may want to use this on a child when reordering it in a way that a different style might apply to it. See also Gtk.Container.get_path_for_child().

New in version 3.0.

send_expose(event)

Parameters:event (Gdk.Event) – a expose Gdk.Event Returns:return from the event signal emission (True if the event was handled) Return type:int

Very rarely-used function. This function is used to emit an expose event on a widget. This function is not normally used directly. The only time it is used is when propagating an expose event to a windowless child widget (Gtk.Widget.get_has_window() is False), and that is normally done using Gtk.Container.propagate_draw().

If you want to force an area of a window to be redrawn, use Gdk.Window.invalidate_rect() or Gdk.Window.invalidate_region(). To cause the redraw to be done immediately, follow that call with a call to Gdk.Window.process_updates().

Deprecated since version 3.22: Application and widget code should not handle expose events directly; invalidation should use the Gtk.Widget API, and drawing should only happen inside Gtk.Widget ::draw implementations

send_focus_change(event)

Parameters:event (Gdk.Event) – a Gdk.Event of type Gdk.EventType.FOCUS_CHANGE Returns:the return value from the event signal emission: True if the event was handled, and False otherwise Return type:bool

Sends the focus change event to self

This function is not meant to be used by applications. The only time it should be used is when it is necessary for a Gtk.Widget to assign focus to a widget that is semantically owned by the first widget even though it’s not a direct child - for instance, a search entry in a floating window similar to the quick search in Gtk.TreeView.

An example of its usage is:

GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);

fevent->focus_change.type = GDK_FOCUS_CHANGE;
fevent->focus_change.in = TRUE;
fevent->focus_change.window = _gtk_widget_get_window (widget);
if (fevent->focus_change.window != NULL)
  g_object_ref (fevent->focus_change.window);

gtk_widget_send_focus_change (widget, fevent);

gdk_event_free (event);

New in version 2.20.

set_accel_path(accel_path, accel_group)

Parameters:

• accel_path (str or None) – path used to look up the accelerator
• accel_group (Gtk.AccelGroup or None) – a Gtk.AccelGroup.

Given an accelerator group, accel_group, and an accelerator path, accel_path, sets up an accelerator in accel_group so whenever the key binding that is defined for accel_path is pressed, self will be activated. This removes any accelerators (for any accelerator group) installed by previous calls to Gtk.Widget.set_accel_path(). Associating accelerators with paths allows them to be modified by the user and the modifications to be saved for future use. (See Gtk.AccelMap.save().)

This function is a low level function that would most likely be used by a menu creation system like Gtk.UIManager. If you use Gtk.UIManager, setting up accelerator paths will be done automatically.

Even when you you aren’t using Gtk.UIManager, if you only want to set up accelerators on menu items Gtk.MenuItem.set_accel_path() provides a somewhat more convenient interface.

Note that accel_path string will be stored in a #GQuark. Therefore, if you pass a static string, you can save some memory by interning it first with GLib.intern_static_string().

set_allocation(allocation)

Parameters:allocation (Gdk.Rectangle) – a pointer to a #GtkAllocation to copy from

Sets the widget’s allocation. This should not be used directly, but from within a widget’s size_allocate method.

The allocation set should be the “adjusted” or actual allocation. If you’re implementing a Gtk.Container, you want to use Gtk.Widget.size_allocate() instead of Gtk.Widget.set_allocation(). The GtkWidgetClass::adjust_size_allocation virtual method adjusts the allocation inside Gtk.Widget.size_allocate() to create an adjusted allocation.

New in version 2.18.

set_app_paintable(app_paintable)

Parameters:app_paintable (bool) – True if the application will paint on the widget

Sets whether the application intends to draw on the widget in an Gtk.Widget ::draw handler.

This is a hint to the widget and does not affect the behavior of the GTK+ core; many widgets ignore this flag entirely. For widgets that do pay attention to the flag, such as Gtk.EventBox and Gtk.Window, the effect is to suppress default themed drawing of the widget’s background. (Children of the widget will still be drawn.) The application is then entirely responsible for drawing the widget background.

Note that the background is still drawn when the widget is mapped.

set_can_default(can_default)

Parameters:can_default (bool) – whether or not self can be a default widget.

Specifies whether self can be a default widget. See Gtk.Widget.grab_default() for details about the meaning of “default”.

New in version 2.18.

set_can_focus(can_focus)

Parameters:can_focus (bool) – whether or not self can own the input focus.

Specifies whether self can own the input focus. See Gtk.Widget.grab_focus() for actually setting the input focus on a widget.

New in version 2.18.

set_child_visible(is_visible)

Parameters:is_visible (bool) – if True, self should be mapped along with its parent.

Sets whether self should be mapped along with its when its parent is mapped and self has been shown with Gtk.Widget.show().

The child visibility can be set for widget before it is added to a container with Gtk.Widget.set_parent(), to avoid mapping children unnecessary before immediately unmapping them. However it will be reset to its default state of True when the widget is removed from a container.

Note that changing the child visibility of a widget does not queue a resize on the widget. Most of the time, the size of a widget is computed from all visible children, whether or not they are mapped. If this is not the case, the container can queue a resize itself.

This function is only useful for container implementations and never should be called by an application.

set_clip(clip)

Parameters:clip (Gdk.Rectangle) – a pointer to a #GtkAllocation to copy from

Sets the widget’s clip. This must not be used directly, but from within a widget’s size_allocate method. It must be called after Gtk.Widget.set_allocation() (or after chaining up to the parent class), because that function resets the clip.

The clip set should be the area that self draws on. If self is a Gtk.Container, the area must contain all children’s clips.

If this function is not called by self during a ::size-allocate handler, the clip will be set to self‘s allocation.

New in version 3.14.

set_composite_name(name)

Parameters:name (str) – the name to set

Sets a widgets composite name. The widget must be a composite child of its parent; see Gtk.Widget.push_composite_child().

Deprecated since version 3.10: Use Gtk.WidgetClass.set_template(), or don’t use this API at all.

set_device_enabled(device, enabled)

Parameters:

• device (Gdk.Device) – a Gdk.Device
• enabled (bool) – whether to enable the device

Enables or disables a Gdk.Device to interact with self and all its children.

It does so by descending through the Gdk.Window hierarchy and enabling the same mask that is has for core events (i.e. the one that Gdk.Window.get_events() returns).

New in version 3.0.

set_device_events(device, events)

Parameters:

• device (Gdk.Device) – a Gdk.Device
• events (Gdk.EventMask) – event mask

Sets the device event mask (see Gdk.EventMask) for a widget. The event mask determines which events a widget will receive from device. Keep in mind that different widgets have different default event masks, and by changing the event mask you may disrupt a widget’s functionality, so be careful. This function must be called while a widget is unrealized. Consider Gtk.Widget.add_device_events() for widgets that are already realized, or if you want to preserve the existing event mask. This function can’t be used with windowless widgets (which return False from Gtk.Widget.get_has_window()); to get events on those widgets, place them inside a Gtk.EventBox and receive events on the event box.

New in version 3.0.

set_direction(dir)

Parameters:dir (Gtk.TextDirection) – the new direction

Sets the reading direction on a particular widget. This direction controls the primary direction for widgets containing text, and also the direction in which the children of a container are packed. The ability to set the direction is present in order so that correct localization into languages with right-to-left reading directions can be done. Generally, applications will let the default reading direction present, except for containers where the containers are arranged in an order that is explicitly visual rather than logical (such as buttons for text justification).

If the direction is set to Gtk.TextDirection.NONE, then the value set by Gtk.Widget.set_default_direction() will be used.

set_double_buffered(double_buffered)

Parameters:double_buffered (bool) – True to double-buffer a widget

Widgets are double buffered by default; you can use this function to turn off the buffering. “Double buffered” simply means that Gdk.Window.begin_draw_frame() and Gdk.Window.end_draw_frame() are called automatically around expose events sent to the widget. Gdk.Window.begin_draw_frame() diverts all drawing to a widget’s window to an offscreen buffer, and Gdk.Window.end_draw_frame() draws the buffer to the screen. The result is that users see the window update in one smooth step, and don’t see individual graphics primitives being rendered.

In very simple terms, double buffered widgets don’t flicker, so you would only use this function to turn off double buffering if you had special needs and really knew what you were doing.

Note: if you turn off double-buffering, you have to handle expose events, since even the clearing to the background color or pixmap will not happen automatically (as it is done in Gdk.Window.begin_draw_frame()).

In 3.10 GTK and GDK have been restructured for translucent drawing. Since then expose events for double-buffered widgets are culled into a single event to the toplevel GDK window. If you now unset double buffering, you will cause a separate rendering pass for every widget. This will likely cause rendering problems - in particular related to stacking - and usually increases rendering times significantly.

Deprecated since version 3.14: This function does not work under non-X11 backends or with non-native windows. It should not be used in newly written code.

set_events(events)

Parameters:events (int) – event mask

Sets the event mask (see Gdk.EventMask) for a widget. The event mask determines which events a widget will receive. Keep in mind that different widgets have different default event masks, and by changing the event mask you may disrupt a widget’s functionality, so be careful. This function must be called while a widget is unrealized. Consider Gtk.Widget.add_events() for widgets that are already realized, or if you want to preserve the existing event mask. This function can’t be used with widgets that have no window. (See Gtk.Widget.get_has_window()). To get events on those widgets, place them inside a Gtk.EventBox and receive events on the event box.

set_focus_on_click(focus_on_click)

Parameters:focus_on_click (bool) – whether the widget should grab focus when clicked with the mouse

Sets whether the widget should grab focus when it is clicked with the mouse. Making mouse clicks not grab focus is useful in places like toolbars where you don’t want the keyboard focus removed from the main area of the application.

New in version 3.20.

set_font_map(font_map)

Parameters:font_map (Pango.FontMap or None) – a Pango.FontMap, or None to unset any previously set font map

Sets the font map to use for Pango rendering. When not set, the widget will inherit the font map from its parent.

New in version 3.18.

set_font_options(options)

Parameters:options (cairo.FontOptions or None) – a cairo.FontOptions, or None to unset any previously set default font options.

Sets the cairo.FontOptions used for Pango rendering in this widget. When not set, the default font options for the Gdk.Screen will be used.

New in version 3.18.

set_halign(align)

Parameters:align (Gtk.Align) – the horizontal alignment

Sets the horizontal alignment of self. See the Gtk.Widget :halign property.

set_has_tooltip(has_tooltip)

Parameters:has_tooltip (bool) – whether or not self has a tooltip.

Sets the has-tooltip property on self to has_tooltip. See Gtk.Widget :has-tooltip for more information.

New in version 2.12.

set_has_window(has_window)

Parameters:has_window (bool) – whether or not self has a window.

Specifies whether self has a Gdk.Window of its own. Note that all realized widgets have a non-None “window” pointer (Gtk.Widget.get_window() never returns a None window when a widget is realized), but for many of them it’s actually the Gdk.Window of one of its parent widgets. Widgets that do not create a %window for themselves in Gtk.Widget ::realize must announce this by calling this function with has_window = False.

This function should only be called by widget implementations, and they should call it in their init() function.

New in version 2.18.

set_hexpand(expand)

Parameters:expand (bool) – whether to expand

Sets whether the widget would like any available extra horizontal space. When a user resizes a Gtk.Window, widgets with expand=:obj:True generally receive the extra space. For example, a list or scrollable area or document in your window would often be set to expand.

Call this function to set the expand flag if you would like your widget to become larger horizontally when the window has extra room.

By default, widgets automatically expand if any of their children want to expand. (To see if a widget will automatically expand given its current children and state, call Gtk.Widget.compute_expand(). A container can decide how the expandability of children affects the expansion of the container by overriding the compute_expand virtual method on Gtk.Widget.).

Setting hexpand explicitly with this function will override the automatic expand behavior.

This function forces the widget to expand or not to expand, regardless of children. The override occurs because Gtk.Widget.set_hexpand() sets the hexpand-set property (see Gtk.Widget.set_hexpand_set()) which causes the widget’s hexpand value to be used, rather than looking at children and widget state.

set_hexpand_set(set)

Parameters:set (bool) – value for hexpand-set property

Sets whether the hexpand flag (see Gtk.Widget.get_hexpand()) will be used.

The hexpand-set property will be set automatically when you call Gtk.Widget.set_hexpand() to set hexpand, so the most likely reason to use this function would be to unset an explicit expand flag.

If hexpand is set, then it overrides any computed expand value based on child widgets. If hexpand is not set, then the expand value depends on whether any children of the widget would like to expand.

There are few reasons to use this function, but it’s here for completeness and consistency.

set_mapped(mapped)

Parameters:mapped (bool) – True to mark the widget as mapped

Marks the widget as being realized.

This function should only ever be called in a derived widget’s “map” or “unmap” implementation.

New in version 2.20.

set_margin_bottom(margin)

Parameters:margin (int) – the bottom margin

Sets the bottom margin of self. See the Gtk.Widget :margin-bottom property.

New in version 3.0.

set_margin_end(margin)

Parameters:margin (int) – the end margin

Sets the end margin of self. See the Gtk.Widget :margin-end property.

New in version 3.12.

set_margin_left(margin)

Parameters:margin (int) – the left margin

Sets the left margin of self. See the Gtk.Widget :margin-left property.

New in version 3.0.

Deprecated since version 3.12: Use Gtk.Widget.set_margin_start() instead.

set_margin_right(margin)

Parameters:margin (int) – the right margin

Sets the right margin of self. See the Gtk.Widget :margin-right property.

New in version 3.0.

Deprecated since version 3.12: Use Gtk.Widget.set_margin_end() instead.

set_margin_start(margin)

Parameters:margin (int) – the start margin

Sets the start margin of self. See the Gtk.Widget :margin-start property.

New in version 3.12.

set_margin_top(margin)

Parameters:margin (int) – the top margin

Sets the top margin of self. See the Gtk.Widget :margin-top property.

New in version 3.0.

set_name(name)

Parameters:name (str) – name for the widget

Widgets can be named, which allows you to refer to them from a CSS file. You can apply a style to widgets with a particular name in the CSS file. See the documentation for the CSS syntax (on the same page as the docs for Gtk.StyleContext).

Note that the CSS syntax has certain special characters to delimit and represent elements in a selector (period, #, >, *...), so using these will make your widget impossible to match by name. Any combination of alphanumeric symbols, dashes and underscores will suffice.

set_no_show_all(no_show_all)

Parameters:no_show_all (bool) – the new value for the “no-show-all” property

Sets the Gtk.Widget :no-show-all property, which determines whether calls to Gtk.Widget.show_all() will affect this widget.

This is mostly for use in constructing widget hierarchies with externally controlled visibility, see Gtk.UIManager.

New in version 2.4.

set_opacity(opacity)

Parameters:opacity (float) – desired opacity, between 0 and 1

Request the self to be rendered partially transparent, with opacity 0 being fully transparent and 1 fully opaque. (Opacity values are clamped to the [0,1] range.). This works on both toplevel widget, and child widgets, although there are some limitations:

For toplevel widgets this depends on the capabilities of the windowing system. On X11 this has any effect only on X screens with a compositing manager running. See Gtk.Widget.is_composited(). On Windows it should work always, although setting a window’s opacity after the window has been shown causes it to flicker once on Windows.

For child widgets it doesn’t work if any affected widget has a native window, or disables double buffering.

New in version 3.8.

set_parent(parent)

Parameters:parent (Gtk.Widget) – parent container

This function is useful only when implementing subclasses of Gtk.Container. Sets the container as the parent of self, and takes care of some details such as updating the state and style of the child to reflect its new location. The opposite function is Gtk.Widget.unparent().

set_parent_window(parent_window)

Parameters:parent_window (Gdk.Window) – the new parent window.

Sets a non default parent window for self.

For Gtk.Window classes, setting a parent_window effects whether the window is a toplevel window or can be embedded into other widgets.

For Gtk.Window classes, this needs to be called before the window is realized.

set_realized(realized)

Parameters:realized (bool) – True to mark the widget as realized

Marks the widget as being realized. This function must only be called after all Gdk.Windows for the self have been created and registered.

This function should only ever be called in a derived widget’s “realize” or “unrealize” implementation.

New in version 2.20.

set_receives_default(receives_default)

Parameters:receives_default (bool) – whether or not self can be a default widget.

Specifies whether self will be treated as the default widget within its toplevel when it has the focus, even if another widget is the default.

See Gtk.Widget.grab_default() for details about the meaning of “default”.

New in version 2.18.

set_redraw_on_allocate(redraw_on_allocate)

Parameters:redraw_on_allocate (bool) – if True, the entire widget will be redrawn when it is allocated to a new size. Otherwise, only the new portion of the widget will be redrawn.

Sets whether the entire widget is queued for drawing when its size allocation changes. By default, this setting is True and the entire widget is redrawn on every size change. If your widget leaves the upper left unchanged when made bigger, turning this setting off will improve performance.

Note that for widgets where Gtk.Widget.get_has_window() is False setting this flag to False turns off all allocation on resizing: the widget will not even redraw if its position changes; this is to allow containers that don’t draw anything to avoid excess invalidations. If you set this flag on a widget with no window that does draw on self->window, you are responsible for invalidating both the old and new allocation of the widget when the widget is moved and responsible for invalidating regions newly when the widget increases size.

set_sensitive(sensitive)

Parameters:sensitive (bool) – True to make the widget sensitive

Sets the sensitivity of a widget. A widget is sensitive if the user can interact with it. Insensitive widgets are “grayed out” and the user can’t interact with them. Insensitive widgets are known as “inactive”, “disabled”, or “ghosted” in some other toolkits.

set_size_request(width, height)

Parameters:

• width (int) – width self should request, or -1 to unset
• height (int) – height self should request, or -1 to unset

Sets the minimum size of a widget; that is, the widget’s size request will be at least width by height. You can use this function to force a widget to be larger than it normally would be.

In most cases, Gtk.Window.set_default_size() is a better choice for toplevel windows than this function; setting the default size will still allow users to shrink the window. Setting the size request will force them to leave the window at least as large as the size request. When dealing with window sizes, Gtk.Window.set_geometry_hints() can be a useful function as well.

Note the inherent danger of setting any fixed size - themes, translations into other languages, different fonts, and user action can all change the appropriate size for a given widget. So, it’s basically impossible to hardcode a size that will always be correct.

The size request of a widget is the smallest size a widget can accept while still functioning well and drawing itself correctly. However in some strange cases a widget may be allocated less than its requested size, and in many cases a widget may be allocated more space than it requested.

If the size request in a given direction is -1 (unset), then the “natural” size request of the widget will be used instead.

The size request set here does not include any margin from the Gtk.Widget properties margin-left, margin-right, margin-top, and margin-bottom, but it does include pretty much all other padding or border properties set by any subclass of Gtk.Widget.

set_state(state)

Parameters:state (Gtk.StateType) – new state for self

This function is for use in widget implementations. Sets the state of a widget (insensitive, prelighted, etc.) Usually you should set the state using wrapper functions such as Gtk.Widget.set_sensitive().

Deprecated since version 3.0: Use Gtk.Widget.set_state_flags() instead.

set_state_flags(flags, clear)

Parameters:

• flags (Gtk.StateFlags) – State flags to turn on
• clear (bool) – Whether to clear state before turning on flags

This function is for use in widget implementations. Turns on flag values in the current widget state (insensitive, prelighted, etc.).

This function accepts the values Gtk.StateFlags.DIR_LTR and Gtk.StateFlags.DIR_RTL but ignores them. If you want to set the widget’s direction, use Gtk.Widget.set_direction().

It is worth mentioning that any other state than Gtk.StateFlags.INSENSITIVE, will be propagated down to all non-internal children if self is a Gtk.Container, while Gtk.StateFlags.INSENSITIVE itself will be propagated down to all Gtk.Container children by different means than turning on the state flag down the hierarchy, both Gtk.Widget.get_state_flags() and Gtk.Widget.is_sensitive() will make use of these.

New in version 3.0.

set_style(style)

Parameters:style (Gtk.Style or None) – a Gtk.Style, or None to remove the effect of a previous call to Gtk.Widget.set_style() and go back to the default style

Used to set the Gtk.Style for a widget (self->style). Since GTK 3, this function does nothing, the passed in style is ignored.

Deprecated since version 3.0: Use Gtk.StyleContext instead

set_support_multidevice(support_multidevice)

Parameters:support_multidevice (bool) – True to support input from multiple devices.

Enables or disables multiple pointer awareness. If this setting is True, self will start receiving multiple, per device enter/leave events. Note that if custom Gdk.Windows are created in Gtk.Widget ::realize, Gdk.Window.set_support_multidevice() will have to be called manually on them.

New in version 3.0.

set_tooltip_markup(markup)

Parameters:markup (str or None) – the contents of the tooltip for self, or None

Sets markup as the contents of the tooltip, which is marked up with the Pango text markup language.

This function will take care of setting Gtk.Widget :has-tooltip to True and of the default handler for the Gtk.Widget ::query-tooltip signal.

See also the Gtk.Widget :tooltip-markup property and Gtk.Tooltip.set_markup().

New in version 2.12.

set_tooltip_text(text)

Parameters:text (str or None) – the contents of the tooltip for self

Sets text as the contents of the tooltip. This function will take care of setting Gtk.Widget :has-tooltip to True and of the default handler for the Gtk.Widget ::query-tooltip signal.

See also the Gtk.Widget :tooltip-text property and Gtk.Tooltip.set_text().

New in version 2.12.

set_tooltip_window(custom_window)

Parameters:custom_window (Gtk.Window or None) – a Gtk.Window, or None

Replaces the default window used for displaying tooltips with custom_window. GTK+ will take care of showing and hiding custom_window at the right moment, to behave likewise as the default tooltip window. If custom_window is None, the default tooltip window will be used.

New in version 2.12.

set_valign(align)

Parameters:align (Gtk.Align) – the vertical alignment

Sets the vertical alignment of self. See the Gtk.Widget :valign property.

set_vexpand(expand)

Parameters:expand (bool) – whether to expand

Sets whether the widget would like any available extra vertical space.

See Gtk.Widget.set_hexpand() for more detail.

set_vexpand_set(set)

Parameters:set (bool) – value for vexpand-set property

Sets whether the vexpand flag (see Gtk.Widget.get_vexpand()) will be used.

See Gtk.Widget.set_hexpand_set() for more detail.

set_visible(visible)

Parameters:visible (bool) – whether the widget should be shown or not

Sets the visibility state of self. Note that setting this to True doesn’t mean the widget is actually viewable, see Gtk.Widget.get_visible().

This function simply calls Gtk.Widget.show() or Gtk.Widget.hide() but is nicer to use when the visibility of the widget depends on some condition.

New in version 2.18.

set_visual(visual)

Parameters:visual (Gdk.Visual or None) – visual to be used or None to unset a previous one

Sets the visual that should be used for by widget and its children for creating Gdk.Windows. The visual must be on the same Gdk.Screen as returned by Gtk.Widget.get_screen(), so handling the Gtk.Widget ::screen-changed signal is necessary.

Setting a new visual will not cause self to recreate its windows, so you should call this function before self is realized.

set_window(window)

Parameters:window (Gdk.Window) – a Gdk.Window

Sets a widget’s window. This function should only be used in a widget’s Gtk.Widget ::realize implementation. The %window passed is usually either new window created with Gdk.Window.new(), or the window of its parent widget as returned by Gtk.Widget.get_parent_window().

Widgets must indicate whether they will create their own Gdk.Window by calling Gtk.Widget.set_has_window(). This is usually done in the widget’s init() function.

Note that this function does not add any reference to window.

New in version 2.18.

shape_combine_region(region)

Parameters:region (cairo.Region or None) – shape to be added, or None to remove an existing shape

Sets a shape for this widget’s GDK window. This allows for transparent windows etc., see Gdk.Window.shape_combine_region() for more information.

New in version 3.0.

show()

Flags a widget to be displayed. Any widget that isn’t shown will not appear on the screen. If you want to show all the widgets in a container, it’s easier to call Gtk.Widget.show_all() on the container, instead of individually showing the widgets.

Remember that you have to show the containers containing a widget, in addition to the widget itself, before it will appear onscreen.

When a toplevel container is shown, it is immediately realized and mapped; other shown widgets are realized and mapped when their toplevel container is realized and mapped.

show_all()

Recursively shows a widget, and any child widgets (if the widget is a container).

show_now()

Shows a widget. If the widget is an unmapped toplevel widget (i.e. a Gtk.Window that has not yet been shown), enter the main loop and wait for the window to actually be mapped. Be careful; because the main loop is running, anything can happen during this function.

size_allocate(allocation)

Parameters:allocation (Gdk.Rectangle) – position and size to be allocated to self

This function is only used by Gtk.Container subclasses, to assign a size and position to their child widgets.

In this function, the allocation may be adjusted. It will be forced to a 1x1 minimum size, and the adjust_size_allocation virtual method on the child will be used to adjust the allocation. Standard adjustments include removing the widget’s margins, and applying the widget’s Gtk.Widget :halign and Gtk.Widget :valign properties.

For baseline support in containers you need to use Gtk.Widget.size_allocate_with_baseline() instead.

size_allocate_with_baseline(allocation, baseline)

Parameters:

• allocation (Gdk.Rectangle) – position and size to be allocated to self
• baseline (int) – The baseline of the child, or -1

This function is only used by Gtk.Container subclasses, to assign a size, position and (optionally) baseline to their child widgets.

In this function, the allocation and baseline may be adjusted. It will be forced to a 1x1 minimum size, and the adjust_size_allocation virtual and adjust_baseline_allocation methods on the child will be used to adjust the allocation and baseline. Standard adjustments include removing the widget’s margins, and applying the widget’s Gtk.Widget :halign and Gtk.Widget :valign properties.

If the child widget does not have a valign of Gtk.Align.BASELINE the baseline argument is ignored and -1 is used instead.

New in version 3.10.

size_request()

Returns:a Gtk.Requisition to be filled in Return type:requisition: Gtk.Requisition

This function is typically used when implementing a Gtk.Container subclass. Obtains the preferred size of a widget. The container uses this information to arrange its child widgets and decide what size allocations to give them with Gtk.Widget.size_allocate().

You can also call this function from an application, with some caveats. Most notably, getting a size request requires the widget to be associated with a screen, because font information may be needed. Multihead-aware applications should keep this in mind.

Also remember that the size request is not necessarily the size a widget will actually be allocated.

Deprecated since version 3.0: Use Gtk.Widget.get_preferred_size() instead.

style_attach()

This function attaches the widget’s Gtk.Style to the widget’s Gdk.Window. It is a replacement for

widget->style = gtk_style_attach (widget->style, widget->window);

and should only ever be called in a derived widget’s “realize” implementation which does not chain up to its parent class’ “realize” implementation, because one of the parent classes (finally Gtk.Widget) would attach the style itself.

New in version 2.20.

Deprecated since version 3.0: This step is unnecessary with Gtk.StyleContext.

style_get_property(property_name, value=None)

Parameters:

• property_name (str) – the name of a style property
• value (GObject.Value or None) – Either None or a correctly initialized GObject.Value

Returns:

The Python value of the style property

Gets the value of a style property of self.

thaw_child_notify()

Reverts the effect of a previous call to Gtk.Widget.freeze_child_notify(). This causes all queued Gtk.Widget ::child-notify signals on self to be emitted.

translate_coordinates(dest_widget, src_x, src_y)

Parameters:

• dest_widget (Gtk.Widget) – a Gtk.Widget
• src_x (int) – X position relative to self
• src_y (int) – Y position relative to self

Returns:

None if either widget was not realized, or there was no common ancestor. Otherwise a (dest_x, dest_y) tuple containing the X and Y position relative to dest_widget.

Return type:

(dest_x: int, dest_y: int) or None

Translate coordinates relative to self’s allocation to coordinates relative to dest_widget’s allocations. In order to perform this operation, both widgets must be realized, and must share a common toplevel.

trigger_tooltip_query()

Triggers a tooltip query on the display where the toplevel of self is located. See Gtk.Tooltip.trigger_tooltip_query() for more information.

New in version 2.12.

unmap()

This function is only for use in widget implementations. Causes a widget to be unmapped if it’s currently mapped.

unparent()

This function is only for use in widget implementations. Should be called by implementations of the remove method on Gtk.Container, to dissociate a child from the container.

unrealize()

This function is only useful in widget implementations. Causes a widget to be unrealized (frees all GDK resources associated with the widget, such as self->window).

unregister_window(window)

Parameters:window (Gdk.Window) – a Gdk.Window

Unregisters a Gdk.Window from the widget that was previously set up with Gtk.Widget.register_window(). You need to call this when the window is no longer used by the widget, such as when you destroy it.

New in version 3.8.

unset_state_flags(flags)

Parameters:flags (Gtk.StateFlags) – State flags to turn off

This function is for use in widget implementations. Turns off flag values for the current widget state (insensitive, prelighted, etc.). See Gtk.Widget.set_state_flags().

New in version 3.0.

do_adjust_baseline_allocation(baseline) virtual

Parameters:baseline (int) –

do_adjust_baseline_request(minimum_baseline, natural_baseline) virtual

Parameters:

• minimum_baseline (int) –
• natural_baseline (int) –

do_adjust_size_allocation(orientation, minimum_size, natural_size, allocated_pos, allocated_size) virtual

Parameters:

• orientation (Gtk.Orientation) –
• minimum_size (int) –
• natural_size (int) –
• allocated_pos (int) –
• allocated_size (int) –

do_adjust_size_request(orientation, minimum_size, natural_size) virtual

Parameters:

• orientation (Gtk.Orientation) –
• minimum_size (int) –
• natural_size (int) –

do_button_press_event(event) virtual

Parameters:event (Gdk.EventButton) – Return type:bool

do_button_release_event(event) virtual

Parameters:event (Gdk.EventButton) – Return type:bool

do_can_activate_accel(signal_id) virtual

Parameters:signal_id (int) – the ID of a signal installed on widget Returns:True if the accelerator can be activated. Return type:bool

Determines whether an accelerator that activates the signal identified by signal_id can currently be activated. This is done by emitting the Gtk.Widget ::can-activate-accel signal on widget; if the signal isn’t overridden by a handler or in a derived widget, then the default check is that the widget must be sensitive, and the widget and all its ancestors mapped.

New in version 2.4.

do_child_notify(child_property) virtual

Parameters:child_property (GObject.ParamSpec) – the name of a child property installed on the class of widget’s parent

Emits a Gtk.Widget ::child-notify signal for the ‘child property [child-properties]’ child_property on widget.

This is the analogue of GObject.Object.notify() for child properties.

Also see Gtk.Container.child_notify().

do_composited_changed() virtual

do_compute_expand(hexpand_p, vexpand_p) virtual

Parameters:

• hexpand_p (bool) –
• vexpand_p (bool) –

do_configure_event(event) virtual

Parameters:event (Gdk.EventConfigure) – Return type:bool

do_damage_event(event) virtual

Parameters:event (Gdk.EventExpose) – Return type:bool

do_delete_event(event) virtual

Parameters:event (Gdk.EventAny) – Return type:bool

do_destroy() virtual

Destroys a widget.

When a widget is destroyed all references it holds on other objects will be released:

• if the widget is inside a container, it will be removed from its parent
• if the widget is a container, all its children will be destroyed, recursively
• if the widget is a top level, it will be removed from the list of top level widgets that GTK+ maintains internally

It’s expected that all references held on the widget will also be released; you should connect to the Gtk.Widget ::destroy signal if you hold a reference to widget and you wish to remove it when this function is called. It is not necessary to do so if you are implementing a Gtk.Container, as you’ll be able to use the Gtk.Container.do_remove() virtual function for that.

It’s important to notice that Gtk.Widget.destroy() will only cause the widget to be finalized if no additional references, acquired using GObject.Object.ref(), are held on it. In case additional references are in place, the widget will be in an “inert” state after calling this function; widget will still point to valid memory, allowing you to release the references you hold, but you may not query the widget’s own state.

You should typically call this function on top level widgets, and rarely on child widgets.

See also: Gtk.Container.remove()

do_destroy_event(event) virtual

Parameters:event (Gdk.EventAny) – Return type:bool

do_direction_changed(previous_direction) virtual

Parameters:previous_direction (Gtk.TextDirection) –

do_dispatch_child_properties_changed(n_pspecs, pspecs) virtual

Parameters:

• n_pspecs (int) –
• pspecs (GObject.ParamSpec) –

do_drag_begin(context) virtual

Parameters:context (Gdk.DragContext) –

do_drag_data_delete(context) virtual

Parameters:context (Gdk.DragContext) –

do_drag_data_get(context, selection_data, info, time_) virtual

Parameters:

• context (Gdk.DragContext) –
• selection_data (Gtk.SelectionData) –
• info (int) –
• time (int) –

do_drag_data_received(context, x, y, selection_data, info, time_) virtual

Parameters:

• context (Gdk.DragContext) –
• x (int) –
• y (int) –
• selection_data (Gtk.SelectionData) –
• info (int) –
• time (int) –

do_drag_drop(context, x, y, time_) virtual

Parameters:

• context (Gdk.DragContext) –
• x (int) –
• y (int) –
• time (int) –

Return type:

bool

do_drag_end(context) virtual

Parameters:context (Gdk.DragContext) –

do_drag_failed(context, result) virtual

Parameters:

• context (Gdk.DragContext) –
• result (Gtk.DragResult) –

Return type:

bool

do_drag_leave(context, time_) virtual

Parameters:

• context (Gdk.DragContext) –
• time (int) –

do_drag_motion(context, x, y, time_) virtual

Parameters:

• context (Gdk.DragContext) –
• x (int) –
• y (int) –
• time (int) –

Return type:

bool

do_draw(cr) virtual

Parameters:cr (cairo.Context) – Return type:bool

do_enter_notify_event(event) virtual

Parameters:event (Gdk.EventCrossing) – Return type:bool

do_event(event) virtual

Parameters:event (Gdk.Event) – a Gdk.Event Returns:return from the event signal emission (True if the event was handled) Return type:bool

Rarely-used function. This function is used to emit the event signals on a widget (those signals should never be emitted without using this function to do so). If you want to synthesize an event though, don’t use this function; instead, use Gtk.main_do_event() so the event will behave as if it were in the event queue. Don’t synthesize expose events; instead, use Gdk.Window.invalidate_rect() to invalidate a region of the window.

do_focus(direction) virtual

Parameters:direction (Gtk.DirectionType) – Return type:bool

do_focus_in_event(event) virtual

Parameters:event (Gdk.EventFocus) – Return type:bool

do_focus_out_event(event) virtual

Parameters:event (Gdk.EventFocus) – Return type:bool

do_get_accessible() virtual

Returns:the Atk.Object associated with widget Return type:Atk.Object

Returns the accessible object that describes the widget to an assistive technology.

If accessibility support is not available, this Atk.Object instance may be a no-op. Likewise, if no class-specific Atk.Object implementation is available for the widget instance in question, it will inherit an Atk.Object implementation from the first ancestor class for which such an implementation is defined.

The documentation of the ATK library contains more information about accessible objects and their uses.

do_get_preferred_height() virtual

Returns:

minimum_height:location to store the minimum height, or None natural_height:location to store the natural height, or None

Return type:(minimum_height: int, natural_height: int)

Retrieves a widget’s initial minimum and natural height.

This call is specific to width-for-height requests.

The returned request will be modified by the GtkWidgetClass::adjust_size_request virtual method and by any Gtk.SizeGroups that have been applied. That is, the returned request is the one that should be used for layout, not necessarily the one returned by the widget itself.

New in version 3.0.

do_get_preferred_height_and_baseline_for_width(width) virtual

Parameters:width (int) – the width which is available for allocation, or -1 if none Returns:

minimum_height:location for storing the minimum height, or None natural_height:location for storing the natural height, or None minimum_baseline:  location for storing the baseline for the minimum height, or None natural_baseline:  location for storing the baseline for the natural height, or None

Return type:(minimum_height: int, natural_height: int, minimum_baseline: int, natural_baseline: int)

Retrieves a widget’s minimum and natural height and the corresponding baselines if it would be given the specified width, or the default height if width is -1. The baselines may be -1 which means that no baseline is requested for this widget.

The returned request will be modified by the GtkWidgetClass::adjust_size_request and GtkWidgetClass::adjust_baseline_request virtual methods and by any Gtk.SizeGroups that have been applied. That is, the returned request is the one that should be used for layout, not necessarily the one returned by the widget itself.

New in version 3.10.

do_get_preferred_height_for_width(width) virtual

Parameters:width (int) – the width which is available for allocation Returns:

minimum_height:location for storing the minimum height, or None natural_height:location for storing the natural height, or None

Return type:(minimum_height: int, natural_height: int)

Retrieves a widget’s minimum and natural height if it would be given the specified width.

The returned request will be modified by the GtkWidgetClass::adjust_size_request virtual method and by any Gtk.SizeGroups that have been applied. That is, the returned request is the one that should be used for layout, not necessarily the one returned by the widget itself.

New in version 3.0.

do_get_preferred_width() virtual

Returns:

minimum_width:location to store the minimum width, or None natural_width:location to store the natural width, or None

Return type:(minimum_width: int, natural_width: int)

Retrieves a widget’s initial minimum and natural width.

This call is specific to height-for-width requests.

The returned request will be modified by the GtkWidgetClass::adjust_size_request virtual method and by any Gtk.SizeGroups that have been applied. That is, the returned request is the one that should be used for layout, not necessarily the one returned by the widget itself.

New in version 3.0.

do_get_preferred_width_for_height(height) virtual

Parameters:height (int) – the height which is available for allocation Returns:

minimum_width:location for storing the minimum width, or None natural_width:location for storing the natural width, or None

Return type:(minimum_width: int, natural_width: int)

Retrieves a widget’s minimum and natural width if it would be given the specified height.

The returned request will be modified by the GtkWidgetClass::adjust_size_request virtual method and by any Gtk.SizeGroups that have been applied. That is, the returned request is the one that should be used for layout, not necessarily the one returned by the widget itself.

New in version 3.0.

do_get_request_mode() virtual

Returns:The Gtk.SizeRequestMode preferred by widget. Return type:Gtk.SizeRequestMode

Gets whether the widget prefers a height-for-width layout or a width-for-height layout.

Gtk.Bin widgets generally propagate the preference of their child, container widgets need to request something either in context of their children or in context of their allocation capabilities.

New in version 3.0.

do_grab_broken_event(event) virtual

Parameters:event (Gdk.EventGrabBroken) – Return type:bool

do_grab_focus() virtual

Causes widget to have the keyboard focus for the Gtk.Window it’s inside. widget must be a focusable widget, such as a Gtk.Entry; something like Gtk.Frame won’t work.

More precisely, it must have the %GTK_CAN_FOCUS flag set. Use Gtk.Widget.set_can_focus() to modify that flag.

The widget also needs to be realized and mapped. This is indicated by the related signals. Grabbing the focus immediately after creating the widget will likely fail and cause critical warnings.

do_grab_notify(was_grabbed) virtual

Parameters:was_grabbed (bool) –

do_hide() virtual

Reverses the effects of Gtk.Widget.show(), causing the widget to be hidden (invisible to the user).

do_hierarchy_changed(previous_toplevel) virtual

Parameters:previous_toplevel (Gtk.Widget) –

do_key_press_event(event) virtual

Parameters:event (Gdk.EventKey) – Return type:bool

do_key_release_event(event) virtual

Parameters:event (Gdk.EventKey) – Return type:bool

do_keynav_failed(direction) virtual

Parameters:direction (Gtk.DirectionType) – direction of focus movement Returns:True if stopping keyboard navigation is fine, False if the emitting widget should try to handle the keyboard navigation attempt in its parent container(s). Return type:bool

This function should be called whenever keyboard navigation within a single widget hits a boundary. The function emits the Gtk.Widget ::keynav-failed signal on the widget and its return value should be interpreted in a way similar to the return value of Gtk.Widget.child_focus():

When True is returned, stay in the widget, the failed keyboard navigation is OK and/or there is nowhere we can/should move the focus to.

When False is returned, the caller should continue with keyboard navigation outside the widget, e.g. by calling Gtk.Widget.child_focus() on the widget’s toplevel.

The default ::keynav-failed handler returns True for Gtk.DirectionType.TAB_FORWARD and Gtk.DirectionType.TAB_BACKWARD. For the other values of Gtk.DirectionType it returns False.

Whenever the default handler returns True, it also calls Gtk.Widget.error_bell() to notify the user of the failed keyboard navigation.

A use case for providing an own implementation of ::keynav-failed (either by connecting to it or by overriding it) would be a row of Gtk.Entry widgets where the user should be able to navigate the entire row with the cursor keys, as e.g. known from user interfaces that require entering license keys.

New in version 2.12.

do_leave_notify_event(event) virtual

Parameters:event (Gdk.EventCrossing) – Return type:bool

do_map() virtual

This function is only for use in widget implementations. Causes a widget to be mapped if it isn’t already.

do_map_event(event) virtual

Parameters:event (Gdk.EventAny) – Return type:bool

do_mnemonic_activate(group_cycling) virtual

Parameters:group_cycling (bool) – True if there are other widgets with the same mnemonic Returns:True if the signal has been handled Return type:bool

Emits the Gtk.Widget ::mnemonic-activate signal.

do_motion_notify_event(event) virtual

Parameters:event (Gdk.EventMotion) – Return type:bool

do_move_focus(direction) virtual

Parameters:direction (Gtk.DirectionType) –

do_parent_set(previous_parent) virtual

Parameters:previous_parent (Gtk.Widget) –

do_popup_menu() virtual

Return type:bool

do_property_notify_event(event) virtual

Parameters:event (Gdk.EventProperty) – Return type:bool

do_proximity_in_event(event) virtual

Parameters:event (Gdk.EventProximity) – Return type:bool

do_proximity_out_event(event) virtual

Parameters:event (Gdk.EventProximity) – Return type:bool

do_query_tooltip(x, y, keyboard_tooltip, tooltip) virtual

Parameters:

• x (int) –
• y (int) –
• keyboard_tooltip (bool) –
• tooltip (Gtk.Tooltip) –

Return type:

bool

do_queue_draw_region(region) virtual

Parameters:region (cairo.Region) – region to draw

Invalidates the area of widget defined by region by calling Gdk.Window.invalidate_region() on the widget’s window and all its child windows. Once the main loop becomes idle (after the current batch of events has been processed, roughly), the window will receive expose events for the union of all regions that have been invalidated.

Normally you would only use this function in widget implementations. You might also use it to schedule a redraw of a Gtk.DrawingArea or some portion thereof.

New in version 3.0.

do_realize() virtual

Creates the GDK (windowing system) resources associated with a widget. For example, widget->window will be created when a widget is realized. Normally realization happens implicitly; if you show a widget and all its parent containers, then the widget will be realized and mapped automatically.

Realizing a widget requires all the widget’s parent widgets to be realized; calling Gtk.Widget.realize() realizes the widget’s parents in addition to widget itself. If a widget is not yet inside a toplevel window when you realize it, bad things will happen.

This function is primarily used in widget implementations, and isn’t very useful otherwise. Many times when you think you might need it, a better approach is to connect to a signal that will be called after the widget is realized automatically, such as Gtk.Widget ::draw. Or simply g_signal_connect () to the Gtk.Widget ::realize signal.

do_screen_changed(previous_screen) virtual

Parameters:previous_screen (Gdk.Screen) –

do_scroll_event(event) virtual

Parameters:event (Gdk.EventScroll) – Return type:bool

do_selection_clear_event(event) virtual

Parameters:event (Gdk.EventSelection) – Return type:bool

do_selection_get(selection_data, info, time_) virtual

Parameters:

• selection_data (Gtk.SelectionData) –
• info (int) –
• time (int) –

do_selection_notify_event(event) virtual

Parameters:event (Gdk.EventSelection) – Return type:bool

do_selection_received(selection_data, time_) virtual

Parameters:

• selection_data (Gtk.SelectionData) –
• time (int) –

do_selection_request_event(event) virtual

Parameters:event (Gdk.EventSelection) – Return type:bool

do_show() virtual

Flags a widget to be displayed. Any widget that isn’t shown will not appear on the screen. If you want to show all the widgets in a container, it’s easier to call Gtk.Widget.show_all() on the container, instead of individually showing the widgets.

Remember that you have to show the containers containing a widget, in addition to the widget itself, before it will appear onscreen.

When a toplevel container is shown, it is immediately realized and mapped; other shown widgets are realized and mapped when their toplevel container is realized and mapped.

do_show_all() virtual

Recursively shows a widget, and any child widgets (if the widget is a container).

do_show_help(help_type) virtual

Parameters:help_type (Gtk.WidgetHelpType) – Return type:bool

do_size_allocate(allocation) virtual

Parameters:allocation (Gdk.Rectangle) – position and size to be allocated to widget

This function is only used by Gtk.Container subclasses, to assign a size and position to their child widgets.

In this function, the allocation may be adjusted. It will be forced to a 1x1 minimum size, and the adjust_size_allocation virtual method on the child will be used to adjust the allocation. Standard adjustments include removing the widget’s margins, and applying the widget’s Gtk.Widget :halign and Gtk.Widget :valign properties.

For baseline support in containers you need to use Gtk.Widget.size_allocate_with_baseline() instead.

do_state_changed(previous_state) virtual

Parameters:previous_state (Gtk.StateType) –

do_state_flags_changed(previous_state_flags) virtual

Parameters:previous_state_flags (Gtk.StateFlags) –

do_style_set(previous_style) virtual

Parameters:previous_style (Gtk.Style) –

do_style_updated() virtual

do_touch_event(event) virtual

Parameters:event (Gdk.EventTouch) – Return type:bool

do_unmap() virtual

This function is only for use in widget implementations. Causes a widget to be unmapped if it’s currently mapped.

do_unmap_event(event) virtual

Parameters:event (Gdk.EventAny) – Return type:bool

do_unrealize() virtual

This function is only useful in widget implementations. Causes a widget to be unrealized (frees all GDK resources associated with the widget, such as widget->window).

do_visibility_notify_event(event) virtual

Parameters:event (Gdk.EventVisibility) – Return type:bool

do_window_state_event(event) virtual

Parameters:event (Gdk.EventWindowState) – Return type:bool

Signal Details

Gtk.Widget.signals.accel_closures_changed(widget)

Signal Name:accel-closures-changed Flags: Parameters:widget (Gtk.Widget) – The object which received the signal

Gtk.Widget.signals.button_press_event(widget, event)

Signal Name:

button-press-event

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• event (Gdk.EventButton) – the Gdk.EventButton which triggered this signal.

Returns:

True to stop other handlers from being invoked for the event. False to propagate the event further.

Return type:

bool

The ::button-press-event signal will be emitted when a button (typically from a mouse) is pressed.

To receive this signal, the Gdk.Window associated to the widget needs to enable the Gdk.EventMask.BUTTON_PRESS_MASK mask.

This signal will be sent to the grab widget if there is one.

Gtk.Widget.signals.button_release_event(widget, event)

Signal Name:

button-release-event

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• event (Gdk.EventButton) – the Gdk.EventButton which triggered this signal.

Returns:

True to stop other handlers from being invoked for the event. False to propagate the event further.

Return type:

bool

The ::button-release-event signal will be emitted when a button (typically from a mouse) is released.

To receive this signal, the Gdk.Window associated to the widget needs to enable the Gdk.EventMask.BUTTON_RELEASE_MASK mask.

This signal will be sent to the grab widget if there is one.

Gtk.Widget.signals.can_activate_accel(widget, signal_id)

Signal Name:

can-activate-accel

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• signal_id (int) – the ID of a signal installed on self

Returns:

True if the signal can be activated.

Return type:

bool

Determines whether an accelerator that activates the signal identified by signal_id can currently be activated. This signal is present to allow applications and derived widgets to override the default Gtk.Widget handling for determining whether an accelerator can be activated.

Gtk.Widget.signals.child_notify(widget, child_property)

Signal Name:

child-notify

Flags:

RUN_FIRST, NO_RECURSE, DETAILED, NO_HOOKS

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• child_property (GObject.ParamSpec) – the GObject.ParamSpec of the changed child property

The ::child-notify signal is emitted for each ‘child property [child-properties]’ that has changed on an object. The signal’s detail holds the property name.

Gtk.Widget.signals.composited_changed(widget)

Signal Name:composited-changed Flags:RUN_LAST, ACTION, DEPRECATED Parameters:widget (Gtk.Widget) – The object which received the signal

The ::composited-changed signal is emitted when the composited status of widgets screen changes. See Gdk.Screen.is_composited().

Deprecated since version 3.22: Use Gdk.Screen ::composited-changed instead.

Gtk.Widget.signals.configure_event(widget, event)

Signal Name:

configure-event

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• event (Gdk.EventConfigure) – the Gdk.EventConfigure which triggered this signal.

Returns:

True to stop other handlers from being invoked for the event. False to propagate the event further.

Return type:

bool

The ::configure-event signal will be emitted when the size, position or stacking of the widget‘s window has changed.

To receive this signal, the Gdk.Window associated to the widget needs to enable the Gdk.EventMask.STRUCTURE_MASK mask. GDK will enable this mask automatically for all new windows.

Gtk.Widget.signals.damage_event(widget, event)

Signal Name:

damage-event

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• event (Gdk.EventExpose) – the Gdk.EventExpose event

Returns:

True to stop other handlers from being invoked for the event. False to propagate the event further.

Return type:

bool

Emitted when a redirected window belonging to widget gets drawn into. The region/area members of the event shows what area of the redirected drawable was drawn into.

New in version 2.14.

Gtk.Widget.signals.delete_event(widget, event)

Signal Name:

delete-event

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• event (Gdk.Event) – the event which triggered this signal

Returns:

True to stop other handlers from being invoked for the event. False to propagate the event further.

Return type:

bool

The ::delete-event signal is emitted if a user requests that a toplevel window is closed. The default handler for this signal destroys the window. Connecting Gtk.Widget.hide_on_delete() to this signal will cause the window to be hidden instead, so that it can later be shown again without reconstructing it.

Gtk.Widget.signals.destroy(widget)

Signal Name:destroy Flags:RUN_CLEANUP, NO_RECURSE, NO_HOOKS Parameters:widget (Gtk.Widget) – The object which received the signal

Signals that all holders of a reference to the widget should release the reference that they hold. May result in finalization of the widget if all references are released.

This signal is not suitable for saving widget state.

Gtk.Widget.signals.destroy_event(widget, event)

Signal Name:

destroy-event

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• event (Gdk.Event) – the event which triggered this signal

Returns:

True to stop other handlers from being invoked for the event. False to propagate the event further.

Return type:

bool

The ::destroy-event signal is emitted when a Gdk.Window is destroyed. You rarely get this signal, because most widgets disconnect themselves from their window before they destroy it, so no widget owns the window at destroy time.

To receive this signal, the Gdk.Window associated to the widget needs to enable the Gdk.EventMask.STRUCTURE_MASK mask. GDK will enable this mask automatically for all new windows.

Gtk.Widget.signals.direction_changed(widget, previous_direction)

Signal Name:

direction-changed

Flags:

RUN_FIRST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• previous_direction (Gtk.TextDirection) – the previous text direction of widget

The ::direction-changed signal is emitted when the text direction of a widget changes.

Gtk.Widget.signals.drag_begin(widget, context)

Signal Name:

drag-begin

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• context (Gdk.DragContext) – the drag context

The ::drag-begin signal is emitted on the drag source when a drag is started. A typical reason to connect to this signal is to set up a custom drag icon with e.g. Gtk.Widget.drag_source_set_icon_pixbuf().

Note that some widgets set up a drag icon in the default handler of this signal, so you may have to use g_signal_connect_after() to override what the default handler did.

Gtk.Widget.signals.drag_data_delete(widget, context)

Signal Name:

drag-data-delete

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• context (Gdk.DragContext) – the drag context

The ::drag-data-delete signal is emitted on the drag source when a drag with the action Gdk.DragAction.MOVE is successfully completed. The signal handler is responsible for deleting the data that has been dropped. What “delete” means depends on the context of the drag operation.

Gtk.Widget.signals.drag_data_get(widget, context, data, info, time)

Signal Name:

drag-data-get

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• context (Gdk.DragContext) – the drag context
• data (Gtk.SelectionData) – the Gtk.SelectionData to be filled with the dragged data
• info (int) – the info that has been registered with the target in the Gtk.TargetList
• time (int) – the timestamp at which the data was requested

The ::drag-data-get signal is emitted on the drag source when the drop site requests the data which is dragged. It is the responsibility of the signal handler to fill data with the data in the format which is indicated by info. See Gtk.SelectionData.set() and Gtk.SelectionData.set_text().

Gtk.Widget.signals.drag_data_received(widget, context, x, y, data, info, time)

Signal Name:

drag-data-received

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• context (Gdk.DragContext) – the drag context
• x (int) – where the drop happened
• y (int) – where the drop happened
• data (Gtk.SelectionData) – the received data
• info (int) – the info that has been registered with the target in the Gtk.TargetList
• time (int) – the timestamp at which the data was received

The ::drag-data-received signal is emitted on the drop site when the dragged data has been received. If the data was received in order to determine whether the drop will be accepted, the handler is expected to call Gdk.drag_status() and not finish the drag. If the data was received in response to a Gtk.Widget ::drag-drop signal (and this is the last target to be received), the handler for this signal is expected to process the received data and then call Gtk.drag_finish(), setting the success parameter depending on whether the data was processed successfully.

Applications must create some means to determine why the signal was emitted and therefore whether to call Gdk.drag_status() or Gtk.drag_finish().

The handler may inspect the selected action with Gdk.DragContext.get_selected_action() before calling Gtk.drag_finish(), e.g. to implement Gdk.DragAction.ASK as shown in the following example:

void
drag_data_received (GtkWidget          *widget,
                    GdkDragContext     *context,
                    gint                x,
                    gint                y,
                    GtkSelectionData   *data,
                    guint               info,
                    guint               time)
{
  if ((data->length >= 0) && (data->format == 8))
    {
      GdkDragAction action;

      // handle data here

      action = gdk_drag_context_get_selected_action (context);
      if (action == GDK_ACTION_ASK)
        {
          GtkWidget *dialog;
          gint response;

          dialog = gtk_message_dialog_new (NULL,
                                           GTK_DIALOG_MODAL |
                                           GTK_DIALOG_DESTROY_WITH_PARENT,
                                           GTK_MESSAGE_INFO,
                                           GTK_BUTTONS_YES_NO,
                                           "Move the data ?\n");
          response = gtk_dialog_run (GTK_DIALOG (dialog));
          gtk_widget_destroy (dialog);

          if (response == GTK_RESPONSE_YES)
            action = GDK_ACTION_MOVE;
          else
            action = GDK_ACTION_COPY;
         }

      gtk_drag_finish (context, TRUE, action == GDK_ACTION_MOVE, time);
    }
  else
    gtk_drag_finish (context, FALSE, FALSE, time);
 }

Gtk.Widget.signals.drag_drop(widget, context, x, y, time)

Signal Name:

drag-drop

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• context (Gdk.DragContext) – the drag context
• x (int) – the x coordinate of the current cursor position
• y (int) – the y coordinate of the current cursor position
• time (int) – the timestamp of the motion event

Returns:

whether the cursor position is in a drop zone

Return type:

bool

The ::drag-drop signal is emitted on the drop site when the user drops the data onto the widget. The signal handler must determine whether the cursor position is in a drop zone or not. If it is not in a drop zone, it returns False and no further processing is necessary. Otherwise, the handler returns True. In this case, the handler must ensure that Gtk.drag_finish() is called to let the source know that the drop is done. The call to Gtk.drag_finish() can be done either directly or in a Gtk.Widget ::drag-data-received handler which gets triggered by calling Gtk.Widget.drag_get_data() to receive the data for one or more of the supported targets.

Gtk.Widget.signals.drag_end(widget, context)

Signal Name:

drag-end

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• context (Gdk.DragContext) – the drag context

The ::drag-end signal is emitted on the drag source when a drag is finished. A typical reason to connect to this signal is to undo things done in Gtk.Widget ::drag-begin.

Gtk.Widget.signals.drag_failed(widget, context, result)

Signal Name:

drag-failed

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• context (Gdk.DragContext) – the drag context
• result (Gtk.DragResult) – the result of the drag operation

Returns:

True if the failed drag operation has been already handled.

Return type:

bool

The ::drag-failed signal is emitted on the drag source when a drag has failed. The signal handler may hook custom code to handle a failed DnD operation based on the type of error, it returns True is the failure has been already handled (not showing the default “drag operation failed” animation), otherwise it returns False.

New in version 2.12.

Gtk.Widget.signals.drag_leave(widget, context, time)

Signal Name:

drag-leave

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• context (Gdk.DragContext) – the drag context
• time (int) – the timestamp of the motion event

The ::drag-leave signal is emitted on the drop site when the cursor leaves the widget. A typical reason to connect to this signal is to undo things done in Gtk.Widget ::drag-motion, e.g. undo highlighting with Gtk.Widget.drag_unhighlight().

Likewise, the Gtk.Widget ::drag-leave signal is also emitted before the ::drag-drop signal, for instance to allow cleaning up of a preview item created in the Gtk.Widget ::drag-motion signal handler.

Gtk.Widget.signals.drag_motion(widget, context, x, y, time)

Signal Name:

drag-motion

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• context (Gdk.DragContext) – the drag context
• x (int) – the x coordinate of the current cursor position
• y (int) – the y coordinate of the current cursor position
• time (int) – the timestamp of the motion event

Returns:

whether the cursor position is in a drop zone

Return type:

bool

The ::drag-motion signal is emitted on the drop site when the user moves the cursor over the widget during a drag. The signal handler must determine whether the cursor position is in a drop zone or not. If it is not in a drop zone, it returns False and no further processing is necessary. Otherwise, the handler returns True. In this case, the handler is responsible for providing the necessary information for displaying feedback to the user, by calling Gdk.drag_status().

If the decision whether the drop will be accepted or rejected can’t be made based solely on the cursor position and the type of the data, the handler may inspect the dragged data by calling Gtk.Widget.drag_get_data() and defer the Gdk.drag_status() call to the Gtk.Widget ::drag-data-received handler. Note that you must pass Gtk.DestDefaults.DROP, Gtk.DestDefaults.MOTION or Gtk.DestDefaults.ALL to Gtk.Widget.drag_dest_set() when using the drag-motion signal that way.

Also note that there is no drag-enter signal. The drag receiver has to keep track of whether he has received any drag-motion signals since the last Gtk.Widget ::drag-leave and if not, treat the drag-motion signal as an “enter” signal. Upon an “enter”, the handler will typically highlight the drop site with Gtk.Widget.drag_highlight().

static void
drag_motion (GtkWidget      *widget,
             GdkDragContext *context,
             gint            x,
             gint            y,
             guint           time)
{
  GdkAtom target;

  PrivateData *private_data = GET_PRIVATE_DATA (widget);

  if (!private_data->drag_highlight)
   {
     private_data->drag_highlight = 1;
     gtk_drag_highlight (widget);
   }

  target = gtk_drag_dest_find_target (widget, context, NULL);
  if (target == GDK_NONE)
    gdk_drag_status (context, 0, time);
  else
   {
     private_data->pending_status
        = gdk_drag_context_get_suggested_action (context);
     gtk_drag_get_data (widget, context, target, time);
   }

  return TRUE;
}

static void
drag_data_received (GtkWidget        *widget,
                    GdkDragContext   *context,
                    gint              x,
                    gint              y,
                    GtkSelectionData *selection_data,
                    guint             info,
                    guint             time)
{
  PrivateData *private_data = GET_PRIVATE_DATA (widget);

  if (private_data->suggested_action)
   {
     private_data->suggested_action = 0;

     // We are getting this data due to a request in drag_motion,
     // rather than due to a request in drag_drop, so we are just
     // supposed to call gdk_drag_status(), not actually paste in
     // the data.

     str = gtk_selection_data_get_text (selection_data);
     if (!data_is_acceptable (str))
       gdk_drag_status (context, 0, time);
     else
       gdk_drag_status (context,
                        private_data->suggested_action,
                        time);
   }
  else
   {
     // accept the drop
   }
}

Gtk.Widget.signals.draw(widget, cr)

Signal Name:

draw

Flags:

RUN_LAST

Parameters:

• widget (Gtk.Widget) – The object which received the signal
• cr (cairo.Context) – the cairo context to draw to

Returns: