Class
ClutterZoomAction
Description [src]
class Clutter.ZoomAction : Clutter.GestureAction
{
/* No available fields */
}Action enabling zooming on actors
ClutterZoomAction is a sub-class of ClutterGestureAction that
implements all the necessary logic for zooming actors using a “pinch”
gesture between two touch points.
The simplest usage of ClutterZoomAction consists in adding it to
a ClutterActor and setting it as reactive; for instance, the following code:
clutter_actor_add_action (actor, clutter_zoom_action_new ());
clutter_actor_set_reactive (actor, TRUE);
will automatically result in the actor to be scale according to the distance between two touch points.
Instance methods
clutter_zoom_action_get_transformed_focal_point
Retrieves the focal point relative to the actor’s coordinates of the current zoom.
Methods inherited from ClutterGestureAction (16)
clutter_gesture_action_cancel
Cancel a ClutterGestureAction before it begins.
clutter_gesture_action_get_device
Retrieves the ClutterInputDevice of a touch point.
clutter_gesture_action_get_last_event
Retrieves a reference to the last ClutterEvent for a touch point. Call
clutter_event_copy() if you need to store the reference somewhere.
clutter_gesture_action_get_motion_coords
Retrieves the coordinates, in stage space, of the latest motion event during the dragging.
clutter_gesture_action_get_motion_delta
Retrieves the incremental delta since the last motion event during the dragging.
clutter_gesture_action_get_n_current_points
Retrieves the number of points currently active.
clutter_gesture_action_get_n_touch_points
Retrieves the number of requested points to trigger the gesture.
clutter_gesture_action_get_press_coords
Retrieves the coordinates, in stage space, of the press event that started the dragging for a specific touch point.
clutter_gesture_action_get_release_coords
Retrieves the coordinates, in stage space, where the touch point was last released.
clutter_gesture_action_get_sequence
Retrieves the ClutterEventSequence of a touch point.
clutter_gesture_action_get_threshold_trigger_distance
Retrieves the threshold trigger distance of the gesture action,
as set using clutter_gesture_action_set_threshold_trigger_distance().
clutter_gesture_action_get_threshold_trigger_edge
Retrieves the edge trigger of the gesture action, as set using
clutter_gesture_action_set_threshold_trigger_edge().
clutter_gesture_action_get_velocity
Retrieves the velocity, in stage pixels per millisecond, of the latest motion event during the dragging.
clutter_gesture_action_set_n_touch_points
Sets the number of points needed to trigger the gesture.
clutter_gesture_action_set_threshold_trigger_distance
Sets the threshold trigger distance for the gesture drag threshold, if any.
clutter_gesture_action_set_threshold_trigger_edge
Sets the edge trigger for the gesture drag threshold, if any.
Methods inherited from ClutterAction (1)
Methods inherited from ClutterActorMeta (5)
clutter_actor_meta_get_actor
Retrieves a pointer to the ClutterActor that owns meta.
clutter_actor_meta_get_enabled
Retrieves whether meta is enabled.
clutter_actor_meta_get_name
Retrieves the name set using clutter_actor_meta_set_name().
clutter_actor_meta_set_enabled
Sets whether meta should be enabled or not.
clutter_actor_meta_set_name
Sets the name of meta.
Properties
Properties inherited from ClutterGestureAction (4)
Clutter.GestureAction:n-touch-points
Number of touch points to trigger a gesture action.
Clutter.GestureAction:threshold-trigger-distance-x
The horizontal trigger distance to be used by the action to either
emit the ClutterGestureAction::gesture-begin signal or to emit
the ClutterGestureAction::gesture-cancel signal.
Clutter.GestureAction:threshold-trigger-distance-y
The vertical trigger distance to be used by the action to either
emit the ClutterGestureAction::gesture-begin signal or to emit
the ClutterGestureAction::gesture-cancel signal.
Clutter.GestureAction:threshold-trigger-edge
The trigger edge to be used by the action to either emit the
ClutterGestureAction::gesture-begin signal or to emit the
ClutterGestureAction::gesture-cancel signal.
Properties inherited from ClutterActorMeta (3)
Clutter.ActorMeta:actor
The ClutterActor attached to the ClutterActorMeta instance.
Clutter.ActorMeta:enabled
Whether or not the ClutterActorMeta is enabled.
Clutter.ActorMeta:name
The unique name to access the ClutterActorMeta.
Signals
Clutter.ZoomAction::zoom
The signal is emitted for each series of touch events that change the distance and focal point between the touch points.
Signals inherited from ClutterGestureAction (4)
ClutterGestureAction::gesture-begin
The signal is emitted when the ClutterActor to which
a ClutterGestureAction has been applied starts receiving a gesture.
ClutterGestureAction::gesture-cancel
The signal is emitted when the ongoing gesture gets
cancelled from the ClutterGestureAction::gesture-progress signal handler.
ClutterGestureAction::gesture-end
The signal is emitted at the end of the gesture gesture, when the pointer’s button is released.
ClutterGestureAction::gesture-progress
The signal is emitted for each motion event after
the ClutterGestureAction::gesture-begin signal has been emitted.
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.