/// <summary>
/// 拖拽结束，将要移动节点的预处理。返回值：是否取消拖拽
/// </summary>
/// <param name="srcNode"></param>
/// <param name="e"></param>
/// <returns></returns>
void ProcessDragDropedNode(BaseTreeNode srcNode, DragDropNodeEventArgs e)
{
BaseTreeNode putNode = e.DragDropResult.DropPutNode as BaseTreeNode;
SdsiteXmlDocument doc = Service.Sdsite.CurrentDocument;
SimpleExIndexXmlElement dragEle = ((ElementNode)srcNode).Element;
SimpleExIndexXmlElement targetEle = null;
if (e.DragDropResult.DropPutNode is DataNode)
{
targetEle = ((ElementNode)e.DragDropResult.DropPutNode).Element;
}
///将要拖放到此节点内
BaseTreeNode parentNode = null;
if (e.DragDropResult.DropResultType == DragDropResultType.Into)
{
parentNode = (BaseTreeNode)e.DragDropResult.DropPutNode;
}
else
{
parentNode = (BaseTreeNode)e.DragDropResult.DropPutNode.Parent;
}
///收藏夹的处理方式
if (parentNode.NodeType == TreeNodeType.Favorite)
{
doc.AddFavorite(dragEle);
}
///
else
{
///移动
if ((e.DrgEvent.Effect & DragDropEffects.Move) != 0)
{
///处理XmlElement
bool result = doc.MoveNode(dragEle, targetEle, e.DragDropResult.DropResultType);
if (result)
{
///处理树节点
srcNode.Parent.RemoveChildNodeTemp(srcNode);
switch (e.DragDropResult.DropResultType)
{
case DragDropResultType.Before:
putNode.Parent.AddChildNodeTemp(putNode.Index, srcNode);
break;
case DragDropResultType.After:
putNode.Parent.AddChildNodeTemp(putNode.Index + 1, srcNode);
break;
case DragDropResultType.Into:
putNode.AddChildNodeTemp(srcNode);
break;
default:
Debug.Assert(false);
break;
}
}
}
///拷贝
else if ((e.DrgEvent.Effect & DragDropEffects.Copy) != 0)
{
doc.CopyNode(dragEle.Id, ((ElementNode)parentNode).Element.Id);
}
}
}