/* Sort drop action targets */
static gint _xfdashboard_drag_action_sort_targets_callback(gconstpointer inLeft, gconstpointer inRight)
{
ClutterActor *actor1, *actor2;
gfloat depth1, depth2;
gfloat x1, y1, w1, h1;
gfloat x2, y2, w2, h2;
ClutterActorBox *box1, *box2;
gint numberPoint1, numberPoint2;
g_return_val_if_fail(XFDASHBOARD_IS_DROP_ACTION(inLeft) && XFDASHBOARD_IS_DROP_ACTION(inRight), 0);
actor1=clutter_actor_meta_get_actor(CLUTTER_ACTOR_META(inLeft));
actor2=clutter_actor_meta_get_actor(CLUTTER_ACTOR_META(inRight));
/* Return -1 if actor in inLeft should be inserted before actor in inRight
* and return 1 if otherwise. If both actors can be handled equal then
* return 0. But how to decide?
* The actor with higher z-depth should be inserted before. If both actors
* have equal z-depth then the actor with the most edge points within the
* other actor (overlap) should be inserted before. Edge points are:
* [left,top], [right,top], [left,bottom] and [right, bottom].
*/
depth1=clutter_actor_get_z_position(actor1);
depth2=clutter_actor_get_z_position(actor2);
if(depth1>depth2) return(-1);
else if(depth1<depth2) return(1);
clutter_actor_get_transformed_position(actor1, &x1, &y1);
clutter_actor_get_transformed_size(actor1, &w1, &h1);
box1=clutter_actor_box_new(x1, y1, x1+w1, y1+h1);
clutter_actor_get_transformed_position(actor2, &x2, &y2);
clutter_actor_get_transformed_size(actor2, &w2, &h2);
box2=clutter_actor_box_new(x2, y2, x2+w2, y2+h2);
numberPoint1 =(clutter_actor_box_contains(box1, x2, y2) ? 1 : 0);
numberPoint1+=(clutter_actor_box_contains(box1, x2+w2, y2) ? 1 : 0);
numberPoint1+=(clutter_actor_box_contains(box1, x2, y2+h2) ? 1 : 0);
numberPoint1+=(clutter_actor_box_contains(box1, x2+w2, y2+h2) ? 1 : 0);
numberPoint2 =(clutter_actor_box_contains(box2, x1, y1) ? 1 : 0);
numberPoint2+=(clutter_actor_box_contains(box2, x1+w1, y1) ? 1 : 0);
numberPoint2+=(clutter_actor_box_contains(box2, x1, y1+h1) ? 1 : 0);
numberPoint2+=(clutter_actor_box_contains(box2, x1+w1, y1+h1) ? 1 : 0);
clutter_actor_box_free(box1);
clutter_actor_box_free(box2);
/* Return result */
if(numberPoint1>numberPoint2) return(1);
else if(numberPoint2>numberPoint1) return(-1);
return(0);
}
/* Drag of an actor to this view as drop target begins */
static gboolean _xfdashboard_workspace_selector_on_drop_begin(XfdashboardLiveWorkspace *self,
XfdashboardDragAction *inDragAction,
gpointer inUserData)
{
ClutterActor *dragSource;
ClutterActor *draggedActor;
gboolean canHandle;
g_return_val_if_fail(XFDASHBOARD_IS_LIVE_WORKSPACE(self), FALSE);
g_return_val_if_fail(XFDASHBOARD_IS_DRAG_ACTION(inDragAction), FALSE);
g_return_val_if_fail(XFDASHBOARD_IS_DROP_ACTION(inUserData), FALSE);
canHandle=FALSE;
/* Get source where dragging started and actor being dragged */
dragSource=xfdashboard_drag_action_get_source(inDragAction);
draggedActor=xfdashboard_drag_action_get_actor(inDragAction);
/* Check if we can handle dragged actor from given source */
if(XFDASHBOARD_IS_WINDOWS_VIEW(dragSource) &&
XFDASHBOARD_IS_LIVE_WINDOW(draggedActor))
{
canHandle=TRUE;
}
if(XFDASHBOARD_IS_APPLICATION_BUTTON(draggedActor))
{
canHandle=TRUE;
}
/* Return TRUE if we can handle dragged actor in this drop target
* otherwise FALSE
*/
return(canHandle);
}
/* Register a new drop target */
static void _xfdashboard_drop_action_register_target(XfdashboardDropAction *self)
{
g_return_if_fail(XFDASHBOARD_IS_DROP_ACTION(self));
/* Check if target is already registered */
if(g_slist_find(_xfdashboard_drop_action_targets, self))
{
g_warning(_("Target %s is already registered"), G_OBJECT_TYPE_NAME(self));
return;
}
/* Add object to list of dropable targets */
_xfdashboard_drop_action_targets=g_slist_prepend(_xfdashboard_drop_action_targets, self);
}
/* Called when attaching and detaching a ClutterActorMeta instance to a ClutterActor */
static void _xfdashboard_drop_action_set_actor(ClutterActorMeta *inActorMeta, ClutterActor *inActor)
{
XfdashboardDropAction *self;
XfdashboardDropActionPrivate *priv;
g_return_if_fail(XFDASHBOARD_IS_DROP_ACTION(inActorMeta));
g_return_if_fail(inActor==NULL || CLUTTER_IS_ACTOR(inActor));
self=XFDASHBOARD_DROP_ACTION(inActorMeta);
priv=self->priv;
/* Unregister current drop target */
if(priv->actor)
{
/* Disconnect signals */
if(priv->destroySignalID) g_signal_handler_disconnect(priv->actor, priv->destroySignalID);
/* Unset style */
if(XFDASHBOARD_IS_ACTOR(priv->actor))
{
xfdashboard_stylable_remove_pseudo_class(XFDASHBOARD_STYLABLE(priv->actor), "drop-target");
}
/* Unregister drop target */
_xfdashboard_drop_action_unregister_target(self);
priv->destroySignalID=0;
priv->actor=NULL;
}
/* Register new drop target */
if(inActor)
{
priv->actor=inActor;
/* Register drop target */
_xfdashboard_drop_action_register_target(self);
/* Connect signals */
priv->destroySignalID=g_signal_connect_swapped(priv->actor,
"destroy",
G_CALLBACK(_xfdashboard_drop_action_on_target_actor_destroy),
self);
}
/* Call parent's class method */
CLUTTER_ACTOR_META_CLASS(xfdashboard_drop_action_parent_class)->set_actor(inActorMeta, inActor);
}
/* Default signal handler for "drag-leave" */
static void _xfdashboard_drop_action_class_real_drag_leave(XfdashboardDropAction *self,
XfdashboardDragAction *inDragAction)
{
XfdashboardDropActionPrivate *priv;
g_return_if_fail(XFDASHBOARD_IS_DROP_ACTION(self));
priv=self->priv;
/* Unset style */
if(priv->actor &&
XFDASHBOARD_IS_ACTOR(priv->actor))
{
xfdashboard_stylable_remove_pseudo_class(XFDASHBOARD_STYLABLE(priv->actor), "drop-target");
}
}
/* Unregister a drop target */
static void _xfdashboard_drop_action_unregister_target(XfdashboardDropAction *self)
{
XfdashboardDropActionPrivate *priv;
g_return_if_fail(XFDASHBOARD_IS_DROP_ACTION(self));
priv=self->priv;
/* Unset style */
if(priv->actor &&
XFDASHBOARD_IS_ACTOR(priv->actor))
{
xfdashboard_stylable_remove_pseudo_class(XFDASHBOARD_STYLABLE(priv->actor), "drop-target");
}
/* Remove target from list of dropable targets */
_xfdashboard_drop_action_targets=g_slist_remove(_xfdashboard_drop_action_targets, self);
}
/* Dragged actor was dropped on this drop target */
static void _xfdashboard_workspace_selector_on_drop_drop(XfdashboardLiveWorkspace *self,
XfdashboardDragAction *inDragAction,
gfloat inX,
gfloat inY,
gpointer inUserData)
{
ClutterActor *draggedActor;
g_return_if_fail(XFDASHBOARD_IS_LIVE_WORKSPACE(self));
g_return_if_fail(XFDASHBOARD_IS_DRAG_ACTION(inDragAction));
g_return_if_fail(XFDASHBOARD_IS_DROP_ACTION(inUserData));
/* Get dragged actor */
draggedActor=xfdashboard_drag_action_get_actor(inDragAction);
/* Check if dragged actor is a window so move window to workspace */
if(XFDASHBOARD_IS_LIVE_WINDOW(draggedActor))
{
XfdashboardWindowTrackerWindow *window;
/* Get window */
window=xfdashboard_live_window_get_window(XFDASHBOARD_LIVE_WINDOW(draggedActor));
g_return_if_fail(window);
/* Move window to workspace */
xfdashboard_window_tracker_window_move_to_workspace(window, xfdashboard_live_workspace_get_workspace(self));
}
/* Check if dragged actor is a application button so launch app at workspace */
if(XFDASHBOARD_IS_APPLICATION_BUTTON(draggedActor))
{
XfdashboardApplicationButton *button;
GAppLaunchContext *context;
/* Get application button */
button=XFDASHBOARD_APPLICATION_BUTTON(draggedActor);
/* Launch application at workspace where application button was dropped */
context=xfdashboard_create_app_context(xfdashboard_live_workspace_get_workspace(self));
xfdashboard_application_button_execute(button, context);
g_object_unref(context);
}
}
/* Transform stage coordinates to drop action's target actor coordinates */
static void _xfdashboard_drag_action_transform_stage_point(XfdashboardDropAction *inDropTarget,
gfloat inStageX,
gfloat inStageY,
gfloat *outActorX,
gfloat *outActorY)
{
ClutterActor *actor;
gfloat x, y;
g_return_if_fail(XFDASHBOARD_IS_DROP_ACTION(inDropTarget));
/* Get target actor of drop action and transform coordinates */
actor=clutter_actor_meta_get_actor(CLUTTER_ACTOR_META(inDropTarget));
clutter_actor_transform_stage_point(actor, inStageX, inStageY, &x, &y);
/* Set return values */
if(outActorX) *outActorX=x;
if(outActorY) *outActorY=y;
}
/* Default signal handler for "begin" */
static gboolean _xfdashboard_drop_action_class_real_begin(XfdashboardDropAction *self,
XfdashboardDragAction *inDragAction)
{
XfdashboardDropActionPrivate *priv;
ClutterActorMeta *actorMeta;
g_return_val_if_fail(XFDASHBOARD_IS_DROP_ACTION(self), FALSE);
g_return_val_if_fail(self->priv->actor, FALSE);
priv=self->priv;
actorMeta=CLUTTER_ACTOR_META(self);
/* Return TRUE means we can handle dragged actor on this drop target. This is only
* possible if drop target is active, visible and reactive. Otherwise we have to
* return FALSE to indicate that we cannot handle dragged actor.
*/
return(clutter_actor_meta_get_enabled(actorMeta) &&
CLUTTER_ACTOR_IS_VISIBLE(priv->actor) &&
CLUTTER_ACTOR_IS_REACTIVE(priv->actor));
}
/* Target actor will be destroyed */
static void _xfdashboard_drop_action_on_target_actor_destroy(XfdashboardDropAction *self, ClutterActor *inTarget)
{
XfdashboardDropActionPrivate *priv;
g_return_if_fail(XFDASHBOARD_IS_DROP_ACTION(self));
g_return_if_fail(CLUTTER_IS_ACTOR(inTarget));
priv=self->priv;
/* Check that destroyed actor matches drop action's target actor */
g_return_if_fail(inTarget==priv->actor);
/* Disconnect signals */
if(priv->destroySignalID) g_signal_handler_disconnect(priv->actor, priv->destroySignalID);
/* Unregister drop target */
_xfdashboard_drop_action_unregister_target(self);
priv->destroySignalID=0;
priv->actor=NULL;
}