Gtk.PadController

Subclasses:

None

Methods

Inherited:

Gtk.EventController (13), GObject.Object (37)

Structs:

GObject.ObjectClass (5)

class	new (group, pad)
	set_action (type, index, mode, label, action_name)
	set_action_entries (entries)

Virtual Methods

Inherited:

GObject.Object (7)

Properties

Inherited:

Gtk.EventController (4)

Name	Type	Flags	Short Description
action-group	Gio.ActionGroup	r/w/co
pad	Gdk.Device	r/w/co

Signals

Inherited:

GObject.Object (1)

Fields

Inherited:

GObject.Object (1)

Class Details

class Gtk.PadController(**kwargs)

Bases:

Gtk.EventController

Abstract:

No

Structure:

Gtk.PadControllerClass

GtkPadController is an event controller for the pads found in drawing tablets.

Pads are the collection of buttons and tactile sensors often found around the stylus-sensitive area.

These buttons and sensors have no implicit meaning, and by default they perform no action. GtkPadController is provided to map those to [iface`Gio`.Action] objects, thus letting the application give them a more semantic meaning.

Buttons and sensors are not constrained to triggering a single action, some Gdk.InputSource.TABLET_PAD devices feature multiple “modes”. All these input elements have one current mode, which may determine the final action being triggered.

Pad devices often divide buttons and sensors into groups. All elements in a group share the same current mode, but different groups may have different modes. See [method`Gdk`.DevicePad.get_n_groups] and [method`Gdk`.DevicePad.get_group_n_modes].

Each of the actions that a given button/strip/ring performs for a given mode is defined by a [struct`Gtk`.PadActionEntry]. It contains an action name that will be looked up in the given [iface`Gio`.ActionGroup] and activated whenever the specified input element and mode are triggered.

A simple example of GtkPadController usage: Assigning button 1 in all modes and pad devices to an “invert-selection” action:

```c Gtk.PadActionEntry *pad_actions[] = { { Gtk.PadActionType.BUTTON, 1, -1, “Invert selection”, “pad-actions.invert-selection” }, … };

… action_group = Gio.SimpleActionGroup.new (); action = Gio.SimpleAction.new (“pad-actions.invert-selection”, None); g_signal_connect (action, “activate”, on_invert_selection_activated, None); Gio.ActionMap.add_action (G_ACTION_MAP (action_group), action); … pad_controller = Gtk.PadController.new (action_group, None); ```

The actions belonging to rings/strips will be activated with a parameter of type %G_VARIANT_TYPE_DOUBLE bearing the value of the given axis, it is required that those are made stateful and accepting this GVariantType.

classmethod new(group, pad)

Parameters:

• group (Gio.ActionGroup) – GActionGroup to trigger actions from

• pad (Gdk.Device or None) – A Gdk.InputSource.TABLET_PAD device, or None to handle all pads

Returns:

A newly created GtkPadController

Return type:

Gtk.PadController

Creates a new GtkPadController that will associate events from pad to actions.

A None pad may be provided so the controller manages all pad devices generically, it is discouraged to mix GtkPadController objects with None and non-None pad argument on the same toplevel window, as execution order is not guaranteed.

The GtkPadController is created with no mapped actions. In order to map pad events to actions, use [method`Gtk`.PadController.set_action_entries] or [method`Gtk`.PadController.set_action].

Be aware that pad events will only be delivered to ``GtkWindow``s, so adding a pad controller to any other type of widget will not have an effect.

set_action(type, index, mode, label, action_name)

Parameters:

• type (Gtk.PadActionType) – the type of pad feature that will trigger this action

• index (int) – the 0-indexed button/ring/strip number that will trigger this action

• mode (int) – the mode that will trigger this action, or -1 for all modes.

• label (str) – Human readable description of this action, this string should be deemed user-visible.

• action_name (str) – action name that will be activated in the GActionGroup

Adds an individual action to self.

This action will only be activated if the given button/ring/strip number in index is interacted while the current mode is mode. -1 may be used for simple cases, so the action is triggered on all modes.

The given label should be considered user-visible, so internationalization rules apply. Some windowing systems may be able to use those for user feedback.

set_action_entries(entries)

Parameters:

entries ([Gtk.PadActionEntry]) – the action entries to set on self

A convenience function to add a group of action entries on self.

See [struct`Gtk`.PadActionEntry] and [method`Gtk`.PadController.set_action].

Property Details

Gtk.PadController.props.action_group

Name:

action-group

Type:

Gio.ActionGroup

Default Value:

None

Flags:

READABLE, WRITABLE, CONSTRUCT_ONLY

Gtk.PadController.props.pad

Name:

pad

Type:

Gdk.Device

Default Value:

None

Flags:

READABLE, WRITABLE, CONSTRUCT_ONLY