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 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); } }
public void OnPointerUp(PointerEventData eventData) { if (DragDropEventData.current.eligibleForClick) { OnClick(DragDropEventData.current); } if (!HandlingDragDropEvent()) { DragDropEventData.current.Reset(); return; } if (DragDropEventData.current.valid) { DragDropItem replacedItem = null; if (DragDropEventData.current.target.CheckCanAttachItem(DragDropEventData.current, out replacedItem)) { if (replacedItem) { // 旧item 离开 DragDropEventData.current.isReplaced = true; DragDropEventData.current.item = replacedItem; DragDropEventData.current.target.OnItemDetach(DragDropEventData.current); replacedItem.OnItemDetach(DragDropEventData.current); // 新item 附着 DragDropEventData.current.isReplaced = false; DragDropEventData.current.item = this; DragDropEventData.current.target.OnItemAttach(DragDropEventData.current); OnItemAttach(DragDropEventData.current); // 旧item 附着到新item原来的target 完成交换 DragDropEventData.current.isReplaced = true; DragDropEventData.current.item = replacedItem; DragDropEventData.current.target = lastTarget; if (DragDropEventData.current.valid) { lastTarget.OnItemAttach(DragDropEventData.current); replacedItem.OnItemAttach(DragDropEventData.current); } else { replacedItem.attachedTarget = null; replacedItem.OnSetFree(DragDropEventData.current); } } else { DragDropEventData.current.target.OnItemAttach(DragDropEventData.current); OnItemAttach(DragDropEventData.current); } } else { DragDropEventData.current.target.OnItemExit(DragDropEventData.current); OnItemExit(DragDropEventData.current); } } else { OnSetFree(DragDropEventData.current); } DragDropEventData.current.Reset(); }