protected virtual void PerformDragDropCore(DropPosition position, RadTreeNode targetNode, List <RadTreeNode> draggedNodes)
{
RadTreeNode parent = targetNode.Parent;
RadTreeNodeCollection collection = targetNode.TreeViewElement.Nodes;
if (parent != null)
{
collection = parent.Nodes;
}
bool dropAtTop = position == DropPosition.BeforeNode;
int index = collection.IndexOf(targetNode);
if (!dropAtTop && index + 1 <= collection.Count)
{
index++;
}
foreach (RadTreeNode node in draggedNodes)
{
if (!this.OnDragEnding(position, node, targetNode))
{
continue;
}
if (node.Parent == parent && node.TreeViewElement == targetNode.TreeViewElement)
{
int nodeIndex = collection.IndexOf(node);
if (nodeIndex < index)
{
index--;
}
}
node.Remove();
collection.Insert(index, node);
index++;
this.owner.OnDragEnded(new RadTreeViewDragEventArgs(node, targetNode));
}
}
protected virtual void PerformDragDropCore(
DropPosition position,
RadTreeNode targetNode,
List <RadTreeNode> draggedNodes)
{
RadTreeNode parent = targetNode.Parent;
RadTreeNodeCollection nodes = targetNode.TreeViewElement.Nodes;
if (parent != null)
{
nodes = parent.Nodes;
}
bool flag = position == DropPosition.BeforeNode;
int index1 = nodes.IndexOf(targetNode);
if (!flag && index1 + 1 <= nodes.Count)
{
++index1;
}
bool isCopyingNodes = this.IsCopyingNodes;
int index2 = 0;
while (index2 < draggedNodes.Count)
{
if (!this.OnDragEnding(position, draggedNodes[index2], targetNode))
{
draggedNodes.RemoveAt(index2);
}
else
{
++index2;
}
}
if (this.owner.bindingProvider.CanDrop || targetNode.treeView != null && targetNode.treeView.bindingProvider.CanDrop)
{
this.owner.bindingProvider.DropNodes(targetNode.Parent, draggedNodes);
foreach (RadTreeNode draggedNode in draggedNodes)
{
this.owner.OnDragEnded(new RadTreeViewDragEventArgs(draggedNode, targetNode));
}
}
else
{
foreach (RadTreeNode draggedNode in draggedNodes)
{
RadTreeNode radTreeNode = draggedNode;
if (radTreeNode.Parent == parent && radTreeNode.TreeViewElement == targetNode.TreeViewElement && nodes.IndexOf(radTreeNode) < index1)
{
--index1;
}
if (isCopyingNodes)
{
radTreeNode = this.CreateTreeNode(radTreeNode);
}
else
{
radTreeNode.Remove();
}
nodes.Insert(index1, radTreeNode);
++index1;
this.owner.OnDragEnded(new RadTreeViewDragEventArgs(radTreeNode, targetNode));
}
}
}