public static bool TryAddItem(DragDropItem item, DragDropTarget target, bool sendCallback = true)
{
if (item == null || target == null)
{
return(false);
}
if (!(item.isActiveAndEnabled && target.isActiveAndEnabled))
{
return(false);
}
if (item.attachedTarget != null)
{
return(false);
}
if (!IsChannelMatch(target, item))
{
return(false);
}
DragDropEventData eventData = new DragDropEventData(!sendCallback);
eventData.Reset();
eventData.target = target;
eventData.item = item;
target.OnItemAttach(eventData);
item.OnItemAttach(eventData);
return(true);
}
public static bool TryAddItem(DragDropItem item, DragDropTarget target)
{
if (item.attachedTarget != null)
{
return(false);
}
if (!IsChannelMatch(target, item))
{
return(false);
}
if (target.currentItemCount >= target.maxItemCount)
{
return(false);
}
DragDropEventData eventData = new DragDropEventData();
eventData.Reset();
eventData.external = true;
eventData.target = target;
eventData.item = item;
target.OnItemEnter(eventData);
item.OnItemEnter(eventData);
target.OnItemAttach(eventData);
item.OnItemAttach(eventData);
return(true);
}
public void OnPointerDown(PointerEventData eventData)
{
currentEventData.Reset();
scrollRect = DragDropHelper.FindComponentUpward <ScrollRect>(transform);
currentEventData.item = this;
currentEventData.eligibleForClick = true;
if (attachedTarget)
{
lastTarget = attachedTarget;
lastParent = attachedTarget.targetParent;
}
else
{
lastParent = transform.parent;
}
if (delayDetach && !freeItem)
{
StartCoroutine(DelayHandleDragDropEvent());
}
}
public static int RemoveAllItems(DragDropTarget target, bool sendCallback = true)
{
var items = target.GetAllAttachedItems();
DragDropEventData eventData = new DragDropEventData(!sendCallback);
eventData.Reset();
eventData.target = target;
for (int count = items.Count, i = count - 1; i >= 0; --i)
{
DragDropItem item = items[i];
eventData.item = item;
target.OnItemDetach(eventData);
item.OnItemDetach(eventData);
item.OnSetFree(eventData);
}
return(items.Count);
}
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);
}
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);
}
}
public static bool TryRemoveItem(DragDropItem item, DragDropTarget target, bool sendCallback = true)
{
if (item == null || target == null)
{
return(false);
}
if (item.attachedTarget == target && target.HasItemAttached(item))
{
DragDropEventData eventData = new DragDropEventData(!sendCallback);
eventData.Reset();
eventData.target = target;
eventData.item = item;
target.OnItemDetach(eventData);
item.OnItemDetach(eventData);
item.OnSetFree(eventData);
return(true);
}
else
{
return(false);
}
}
