Gtk.GestureZoom¶

Subclasses:	None

Methods¶

Inherited:	Gtk.Gesture (19), Gtk.EventController (5), GObject.Object (37)
Structs:	GObject.ObjectClass (5)

class	`new` (widget)
	`get_scale_delta` ()

Virtual Methods¶

Inherited:	GObject.Object (7)

Properties¶

Inherited:	Gtk.Gesture (2), Gtk.EventController (2)

Signals¶

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

Name	Short Description
`scale-changed`	This signal is 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`

Gtk.GestureZoom is a Gtk.Gesture implementation able to recognize pinch/zoom gestures, whenever the distance between both tracked sequences changes, the Gtk.GestureZoom ::scale-changed signal is emitted to report the scale factor.

classmethod new(widget)[source]¶

Parameters:	widget (`Gtk.Widget`) – a `Gtk.Widget`
Returns:	a newly created `Gtk.GestureZoom`
Return type:	`Gtk.Gesture`

Returns a newly created Gtk.Gesture that recognizes zoom in/out gestures (usually known as pinch/zoom).

New in version 3.14.

get_scale_delta()[source]¶

Returns:	the scale delta
Return type:	`float`

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.

New in version 3.14.

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

This signal is emitted whenever the distance between both tracked sequences changes.

New in version 3.14.