Class: Gtk::GestureZoom

Inherits:
Gesture show all
Defined in:
(unknown)

Instance Method Summary collapse

Methods inherited from Gesture

#device, #get_bounding_box, #get_bounding_box_center, #get_last_event, #get_point, #get_sequence_state, #group, #handles_sequence, #is_active, #is_grouped_with, #is_recognized, #last_updated_sequence, #n_points, #n_points=, #sequences, #set_sequence_state, #state=, #ungroup

Methods inherited from EventController

#current_event, #current_event_device, #current_event_state, #current_event_time, #name, #name=, #propagation_limit, #propagation_limit=, #propagation_phase, #propagation_phase=, #reset, #static_name=, #widget, #widget=

Constructor Details

#initialize ⇒ Gtk::Gesture

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

Instance Method Details

#scale_delta ⇒ Float

Gets the scale delta.

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