private void ft_DragOverNode(object sender, FastTreeNS.DragOverItemEventArgs e)
{
var draggedNodes = (e.Data.GetData(typeof(HashSet <object>)) as HashSet <object>).ToList().Cast <Node>();
var targetNode = e.Tag as Node;
//check if targetNode is child of draggedNodes
foreach (var n in draggedNodes)
{
if (targetNode.IsChildOf(n) || n == targetNode)
{
return;
}
}
//
e.Effect = e.AllowedEffect;
if (e.X > e.TextRect.Left + 50)
{
e.InsertEffect = FastTreeNS.InsertEffect.AddAsChild;
}
else
if (e.Y < e.TextRect.Top + 10)
{
e.InsertEffect = FastTreeNS.InsertEffect.InsertBefore;
}
else
{
e.InsertEffect = FastTreeNS.InsertEffect.InsertAfter;
}
}
private void ft_DropOverNode(object sender, FastTreeNS.DragOverItemEventArgs e)
{
var draggedNodes = (e.Data.GetData(typeof(HashSet <object>)) as HashSet <object>).ToList().Cast <Node>();
var targetNode = e.Tag as Node;
//
switch (e.InsertEffect)
{
case FastTreeNS.InsertEffect.AddAsChild: AddChild(draggedNodes, targetNode); break;
case FastTreeNS.InsertEffect.InsertBefore: InsertBefore(draggedNodes, targetNode); break;
case FastTreeNS.InsertEffect.InsertAfter: InsertAfter(draggedNodes, targetNode); break;
}
ft.Build(root);
}
