Gtk.GestureZoom¶

Subclasses:: None

Methods¶

Inherited:: Gtk.Gesture (17), Gtk.EventController (13), GObject.Object (37)
Structs:: GObject.ObjectClass (5)

class	`new` ()
	`get_scale_delta` ()

Virtual Methods¶

Inherited:: GObject.Object (7)

Properties¶

Inherited:: Gtk.Gesture (1), Gtk.EventController (4)

Signals¶

Inherited:: Gtk.Gesture (5), GObject.Object (1)

Name	Short Description
`scale-changed`	Emitted whenever the distance between both tracked sequences changes.

Fields¶

Inherited:: Gtk.Gesture (5), GObject.Object (1)

Class Details¶

class Gtk.GestureZoom(**kwargs)¶

Bases:: Gtk.Gesture
Abstract:: No
Structure:: Gtk.GestureZoomClass

GtkGestureZoom is a GtkGesture for 2-finger pinch/zoom gestures.

Whenever the distance between both tracked sequences changes, the [signal`Gtk`.GestureZoom::scale-changed] signal is emitted to report the scale factor.

classmethod new()[source]¶

Returns:: a newly created GtkGestureZoom
Return type:: Gtk.Gesture

Returns a newly created GtkGesture that recognizes pinch/zoom gestures.

get_scale_delta()[source]¶

Returns:: the scale delta
Return type:: float

Gets the scale delta.

If self is active, this function returns the zooming difference since the gesture was recognized (hence the starting point is considered 1:1). If self is not active, 1 is returned.

Signal Details¶

Gtk.GestureZoom.signals.scale_changed(gesture_zoom, scale)¶

Signal Name:

scale-changed

Flags:

RUN_FIRST

Parameters:

gesture_zoom (Gtk.GestureZoom) – The object which received the signal
scale (float) – Scale delta, taking the initial state as 1:1

Emitted whenever the distance between both tracked sequences changes.