Class: Gtk::GestureZoom

Inherits:

Object

• Object
• Gtk::GestureZoom

Defined in:

(unknown)

Instance Method Summary

• #new(widget) ⇒ Gtk::Gesture

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

• #scale_delta ⇒ Float

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

Instance Method Details

#new(widget) ⇒ Gtk::Gesture

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

Parameters:

• widget (Gtk::Widget) —

  a Gtk::Widget

Returns:

• (Gtk::Gesture) —

  a newly created Gtk::GestureZoom

#scale_delta ⇒ Float

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

Returns:

• (Float) —

  the scale delta