Signal

ClutterZoomAction::zoom

Declaration

gboolean
zoom (
  ClutterZoomAction* self,
  ClutterActor* actor,
  const graphene_point_t* focal_point,
  gdouble factor,
  gpointer user_data
)

Description [src]

The signal is emitted for each series of touch events that change the distance and focal point between the touch points.

The default handler of the signal will call clutter_actor_set_scale() on actor using the ratio of the first distance between the touch points and the current distance. To override the default behaviour, connect to this signal and return FALSE.

Default handler:

The default handler is called after the handlers added via g_signal_connect().

Parameters

actor

Type: ClutterActor

The ClutterActor attached to the action.

The data is owned by the caller of the function.

focal_point

Type: graphene_point_t

The focal point of the zoom.

The data is owned by the caller of the function.

factor

Type: gdouble

The initial distance between the 2 touch points.

Return value

Type: gboolean

TRUE if the zoom should continue, and FALSE if the zoom should be cancelled.