/*
* _clutter_input_device_update:
* @device: a #ClutterInputDevice
*
* Updates the input @device by determining the #ClutterActor underneath the
* pointer's cursor
*
* This function calls _clutter_input_device_set_actor() if needed.
*
* This function only works for #ClutterInputDevice of type
* %CLUTTER_POINTER_DEVICE.
*
* Since: 1.2
*/
ClutterActor *
_clutter_input_device_update (ClutterInputDevice *device,
gboolean emit_crossing)
{
ClutterStage *stage;
ClutterActor *new_cursor_actor;
ClutterActor *old_cursor_actor;
gint x, y;
if (device->device_type == CLUTTER_KEYBOARD_DEVICE)
return NULL;
stage = device->stage;
if (G_UNLIKELY (stage == NULL))
{
CLUTTER_NOTE (EVENT, "No stage defined for device '%s'",
clutter_input_device_get_device_name (device));
return NULL;
}
clutter_input_device_get_device_coords (device, &x, &y);
old_cursor_actor = device->cursor_actor;
new_cursor_actor = _clutter_do_pick (stage, x, y, CLUTTER_PICK_REACTIVE);
/* if the pick could not find an actor then we do not update the
* input device, to avoid ghost enter/leave events; the pick should
* never fail, except for bugs in the glReadPixels() implementation
* in which case this is the safest course of action anyway
*/
if (new_cursor_actor == NULL)
return NULL;
CLUTTER_NOTE (EVENT,
"Actor under cursor (device %d, at %d, %d): %s",
clutter_input_device_get_device_id (device),
x, y,
clutter_actor_get_name (new_cursor_actor) != NULL
? clutter_actor_get_name (new_cursor_actor)
: G_OBJECT_TYPE_NAME (new_cursor_actor));
/* short-circuit here */
if (new_cursor_actor == old_cursor_actor)
return old_cursor_actor;
_clutter_input_device_set_actor (device, new_cursor_actor, emit_crossing);
return device->cursor_actor;
}
static void
get_pointer_and_view_coords (ClutterActor *self,
gint *mouse_x,
gint *mouse_y,
gfloat *box_x,
gfloat *box_y,
gfloat *width,
gfloat *height)
{
StScrollViewPrivate *priv = ST_SCROLL_VIEW (self)->priv;
clutter_input_device_get_device_coords (priv->mouse_pointer, mouse_x, mouse_y);
clutter_actor_get_transformed_position (self, box_x, box_y);
clutter_actor_get_transformed_size (self, width, height);
}
