private void MailPage_DragDrop(object sender, DragEventArgs e)
{
System.Drawing.Point targetPoint = this.PointToClient(new System.Drawing.Point(e.X, e.Y));
ContentNode targetNode = this.GetNodeAt(targetPoint) as ContentNode;
if (null == targetNode)
{
return;
}
ContentNode draggedNode = (ContentNode)e.Data.GetData(typeof(ContentNode));
if (!draggedNode.Equals(targetNode) && !ContainsNode(draggedNode, targetNode))
{
if (e.Effect == DragDropEffects.Move)
{
int oldParent = draggedNode.Content.Parent;
draggedNode.Content.Parent = targetNode.Content.Id;
try
{
UpdateParent(draggedNode.Content);
draggedNode.Remove();
targetNode.Nodes.Add(draggedNode);
targetNode.Expand();
}
catch (Exception exception)
{
draggedNode.Content.Parent = oldParent;
Utils.ShowMsgBox(exception);
}
}
}
}