GestureZoom

Object Hierarchy:

Gtk.GestureZoom Gtk.GestureZoom Gtk.GestureZoom Gtk.Gesture Gtk.Gesture Gtk.Gesture->Gtk.GestureZoom Gtk.EventController Gtk.EventController Gtk.EventController->Gtk.Gesture GLib.Object GLib.Object GLib.Object->Gtk.EventController

Description:

[ CCode ( type_id = "gtk_gesture_zoom_get_type ()" ) ]
public sealed class GestureZoom : Gesture

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


Namespace: Gtk
Package: gtk+-3.0

Content:

Creation methods:

  • public GestureZoom (Widget widget)
    Returns a newly created Gesture that recognizes zoom in/out gestures (usually known as pinch/zoom).

Methods:

  • public double get_scale_delta ()
    If this is active, this function returns the zooming difference since the gesture was recognized (hence the starting point is considered 1:1).

Signals:

  • public signal void scale_changed (double scale)
    This signal is emitted whenever the distance between both tracked sequences changes.

Inherited Members:

All known members inherited from class Gtk.Gesture
All known members inherited from class Gtk.EventController
All known members inherited from class GLib.Object