/*
* _clutter_input_device_set_actor:
* @device: a #ClutterInputDevice
* @actor: a #ClutterActor
*
* Sets the actor under the pointer coordinates of @device
*
* This function is called by _clutter_input_device_update()
* and it will:
*
* - queue a %CLUTTER_LEAVE event on the previous pointer actor
* of @device, if any
* - set to %FALSE the :has-pointer property of the previous
* pointer actor of @device, if any
* - queue a %CLUTTER_ENTER event on the new pointer actor
* - set to %TRUE the :has-pointer property of the new pointer
* actor
*/
void
_clutter_input_device_set_actor (ClutterInputDevice *device,
ClutterActor *actor)
{
ClutterActor *old_actor;
ClutterEvent cev;
g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
if (actor == device->cursor_actor)
return;
old_actor = device->cursor_actor;
if (old_actor != NULL)
{
cev.crossing.type = CLUTTER_LEAVE;
cev.crossing.time = device->current_time;
cev.crossing.flags = 0;
cev.crossing.stage = device->stage;
cev.crossing.source = device->cursor_actor;
cev.crossing.x = device->current_x;
cev.crossing.y = device->current_y;
cev.crossing.device = device;
cev.crossing.related = actor;
/* we need to make sure that this event is processed before
* any other event we might have queued up until now, so we
* go on and synthesize the event emission
*/
_clutter_process_event (&cev);
_clutter_actor_set_has_pointer (device->cursor_actor, FALSE);
g_object_weak_unref (G_OBJECT (device->cursor_actor),
cursor_weak_unref,
device);
device->cursor_actor = NULL;
}
if (actor != NULL)
{
cev.crossing.type = CLUTTER_ENTER;
cev.crossing.time = device->current_time;
cev.crossing.flags = 0;
cev.crossing.stage = device->stage;
cev.crossing.x = device->current_x;
cev.crossing.y = device->current_y;
cev.crossing.device = device;
CLUTTER_NOTE (EVENT, "Device '%s' entering '%s' at %d, %d",
device->device_name,
clutter_actor_get_name (actor) != NULL
? clutter_actor_get_name (actor)
: G_OBJECT_TYPE_NAME (actor),
device->current_x,
device->current_y);
/* if there is an actor overlapping the Stage boundary and we
* don't do this check then we'll emit an ENTER event only on
* the actor instead of emitting it on the Stage *and* the
* actor
*/
if (old_actor == NULL && actor != CLUTTER_ACTOR (device->stage))
{
cev.crossing.source = CLUTTER_ACTOR (device->stage);
cev.crossing.related = NULL;
CLUTTER_NOTE (EVENT, "Adding Crossing[Enter] event for Stage");
_clutter_process_event (&cev);
cev.crossing.source = actor;
cev.crossing.related = CLUTTER_ACTOR (device->stage);
}
else
{
cev.crossing.source = actor;
cev.crossing.related = old_actor;
}
/* as above: we need to make sure that this event is processed
* before any other event we might have queued up until now, so
* we go on and synthesize the event emission
*/
_clutter_process_event (&cev);
}
device->cursor_actor = actor;
if (device->cursor_actor != NULL)
{
g_object_weak_ref (G_OBJECT (device->cursor_actor),
cursor_weak_unref,
device);
_clutter_actor_set_has_pointer (device->cursor_actor, TRUE);
}
}
/*< private >
* clutter_input_device_set_actor:
* @device: a #ClutterInputDevice
* @actor: a #ClutterActor
* @emit_crossing: %TRUE to emit crossing events
*
* Sets the actor under the pointer coordinates of @device
*
* This function is called by _clutter_input_device_update()
* and it will:
*
* - queue a %CLUTTER_LEAVE event on the previous pointer actor
* of @device, if any
* - set to %FALSE the :has-pointer property of the previous
* pointer actor of @device, if any
* - queue a %CLUTTER_ENTER event on the new pointer actor
* - set to %TRUE the :has-pointer property of the new pointer
* actor
*/
void
_clutter_input_device_set_actor (ClutterInputDevice *device,
ClutterActor *actor,
gboolean emit_crossing)
{
ClutterActor *old_actor;
if (device->cursor_actor == actor)
return;
old_actor = device->cursor_actor;
if (old_actor != NULL)
{
if (emit_crossing)
{
ClutterEvent *event;
event = clutter_event_new (CLUTTER_LEAVE);
event->crossing.time = device->current_time;
event->crossing.flags = 0;
event->crossing.stage = device->stage;
event->crossing.source = device->cursor_actor;
event->crossing.x = device->current_x;
event->crossing.y = device->current_y;
event->crossing.related = actor;
clutter_event_set_device (event, device);
/* we need to make sure that this event is processed
* before any other event we might have queued up until
* now, so we go on, and synthesize the event emission
* ourselves
*/
_clutter_process_event (event);
clutter_event_free (event);
}
/* processing the event might have destroyed the actor */
if (device->cursor_actor != NULL)
{
_clutter_actor_set_has_pointer (device->cursor_actor, FALSE);
g_object_weak_unref (G_OBJECT (device->cursor_actor),
cursor_weak_unref,
device);
device->cursor_actor = NULL;
}
}
if (actor != NULL)
{
if (emit_crossing)
{
ClutterEvent *event;
event = clutter_event_new (CLUTTER_ENTER);
event->crossing.time = device->current_time;
event->crossing.flags = 0;
event->crossing.stage = device->stage;
event->crossing.x = device->current_x;
event->crossing.y = device->current_y;
event->crossing.source = actor;
event->crossing.related = old_actor;
clutter_event_set_device (event, device);
/* see above */
_clutter_process_event (event);
clutter_event_free (event);
}
}
device->cursor_actor = actor;
if (device->cursor_actor != NULL)
{
g_object_weak_ref (G_OBJECT (device->cursor_actor),
cursor_weak_unref,
device);
_clutter_actor_set_has_pointer (device->cursor_actor, TRUE);
}
}
