Class

GtkGestureZoom

Description [src]

final class Gtk.GestureZoom : Gtk.Gesture
{
  /* No available fields */
}

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

Whenever the distance between both tracked sequences changes, the GtkGestureZoom::scale-changed signal is emitted to report the scale factor.

Hierarchy

hierarchy this GtkGestureZoom ancestor_0 GtkGesture ancestor_0--this ancestor_1 GtkEventController ancestor_1--ancestor_0 ancestor_2 GObject ancestor_2--ancestor_1

Constructors

gtk_gesture_zoom_new

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

Instance methods

gtk_gesture_zoom_get_scale_delta

Gets the scale delta.

Methods inherited from GtkGesture (17)
gtk_gesture_get_bounding_box

If there are touch sequences being currently handled by gesture, returns TRUE and fills in rect with the bounding box containing all active touches.

gtk_gesture_get_bounding_box_center

If there are touch sequences being currently handled by gesture, returns TRUE and fills in x and y with the center of the bounding box containing all active touches.

gtk_gesture_get_device

Returns the logical GdkDevice that is currently operating on gesture.

gtk_gesture_get_group

Returns all gestures in the group of gesture.

gtk_gesture_get_last_event

Returns the last event that was processed for sequence.

gtk_gesture_get_last_updated_sequence

Returns the GdkEventSequence that was last updated on gesture.

gtk_gesture_get_point

If sequence is currently being interpreted by gesture, returns TRUE and fills in x and y with the last coordinates stored for that event sequence.

gtk_gesture_get_sequence_state

Returns the sequence state, as seen by gesture.

gtk_gesture_get_sequences

Returns the list of GdkEventSequences currently being interpreted by gesture.

gtk_gesture_group

Adds gesture to the same group than group_gesture.

gtk_gesture_handles_sequence

Returns TRUE if gesture is currently handling events corresponding to sequence.

gtk_gesture_is_active

Returns TRUE if the gesture is currently active.

gtk_gesture_is_grouped_with

Returns TRUE if both gestures pertain to the same group.

gtk_gesture_is_recognized

Returns TRUE if the gesture is currently recognized.

gtk_gesture_set_sequence_state

Sets the state of sequence in gesture.

deprecated: 4.10. 

gtk_gesture_set_state

Sets the state of all sequences that gesture is currently interacting with.

gtk_gesture_ungroup

Separates gesture into an isolated group.

Methods inherited from GtkEventController (13)
gtk_event_controller_get_current_event

Returns the event that is currently being handled by the controller.

gtk_event_controller_get_current_event_device

Returns the device of the event that is currently being handled by the controller.

gtk_event_controller_get_current_event_state

Returns the modifier state of the event that is currently being handled by the controller.

gtk_event_controller_get_current_event_time

Returns the timestamp of the event that is currently being handled by the controller.

gtk_event_controller_get_name

Gets the name of controller.

gtk_event_controller_get_propagation_limit

Gets the propagation limit of the event controller.

gtk_event_controller_get_propagation_phase

Gets the propagation phase at which controller handles events.

gtk_event_controller_get_widget

Returns the GtkWidget this controller relates to.

gtk_event_controller_reset

Resets the controller to a clean state.

gtk_event_controller_set_name

Sets a name on the controller that can be used for debugging.

gtk_event_controller_set_propagation_limit

Sets the event propagation limit on the event controller.

gtk_event_controller_set_propagation_phase

Sets the propagation phase at which a controller handles events.

gtk_event_controller_set_static_name

Sets a name on the controller that can be used for debugging.

since: 4.8

Methods inherited from GObject (43)

Please see GObject for a full list of methods.

Properties

Properties inherited from GtkGesture (1)
Gtk.Gesture:n-points

The number of touch points that trigger recognition on this gesture.

Properties inherited from GtkEventController (4)
Gtk.EventController:name

The name for this controller, typically used for debugging purposes.

Gtk.EventController:propagation-limit

The limit for which events this controller will handle.

Gtk.EventController:propagation-phase

The propagation phase at which this controller will handle events.

Gtk.EventController:widget

The widget receiving the GdkEvents that the controller will handle.

Signals

Gtk.GestureZoom::scale-changed

Emitted whenever the distance between both tracked sequences changes.

Signals inherited from GtkGesture (5)
GtkGesture::begin

Emitted when the gesture is recognized.

GtkGesture::cancel

Emitted whenever a sequence is cancelled.

GtkGesture::end

Emitted when gesture either stopped recognizing the event sequences as something to be handled, or the number of touch sequences became higher or lower than GtkGesture:n-points.

GtkGesture::sequence-state-changed

Emitted whenever a sequence state changes.

GtkGesture::update

Emitted whenever an event is handled while the gesture is recognized.

Signals inherited from GObject (1)
GObject::notify

The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.

Class structure

struct GtkGestureZoomClass {
  /* no available fields */
}

No description available.