public static int RemoveAllItems(DragDropTarget target)
{
var items = target.GetAllAttachedItems();
DragDropEventData eventData = new DragDropEventData();
eventData.Reset();
eventData.external = true;
eventData.target = target;
foreach (var item in items)
{
eventData.item = item;
target.OnItemDetach(eventData);
item.OnItemDetach(eventData);
target.OnItemExit(eventData);
item.OnItemExit(eventData);
item.OnSetFree(eventData);
}
return(items.Length);
}
void ReplaceDropTarget(DragDropTarget oldTarget, DragDropTarget newTarget)
{
if (oldTarget == newTarget)
{
return;
}
if (oldTarget)
{
oldTarget.OnItemExit(DragDropEventData.current);
OnItemExit(DragDropEventData.current);
}
DragDropEventData.current.target = newTarget;
if (newTarget)
{
newTarget.OnItemEnter(DragDropEventData.current);
OnItemEnter(DragDropEventData.current);
}
}
public static bool TryRemoveItem(DragDropItem item, DragDropTarget target)
{
if (item.attachedTarget == target && target.HasItemAttached(item))
{
DragDropEventData eventData = new DragDropEventData();
eventData.Reset();
eventData.external = true;
eventData.target = target;
eventData.item = item;
target.OnItemDetach(eventData);
item.OnItemDetach(eventData);
target.OnItemExit(eventData);
item.OnItemExit(eventData);
item.OnSetFree(eventData);
return(true);
}
else
{
return(false);
}
}
