void IDropable.Drop(object data, DropLocation location)
{
var droppedElement = data as NodeItem;
if (droppedElement == null)
{
return;
}
if (object.ReferenceEquals(droppedElement, this))
{
//if dragged and dropped yourself, don't need to do anything
return;
}
var arg = new NodeDropRequest
{
DroppedNode = droppedElement.State.DataContext,
DropTarget = State.DataContext,
Location = location
};
var editor = this.FindParentOfType <TreeEditor>();
if (editor.DropCommand != null && editor.DropCommand.CanExecute(arg))
{
editor.DropCommand.Execute(arg);
}
if (location == DropLocation.InPlace)
{
IsExpanded = true;
}
}
public void ApplyDrop(NodeDropRequest request)
{
var droppedNode = new NodeWriteAccess(request.DroppedNode);
var dropTarget = new NodeWriteAccess(request.DropTarget);
if (request.DropTarget == myRoot)
{
ChangeParent(droppedNode, n => myRoot.Children.Add(n), myRoot);
}
else if (request.Location == DropLocation.Before || request.Location == DropLocation.After)
{
MoveNode(droppedNode, dropTarget, request.Location);
}
else
{
ChangeParent(droppedNode, n => dropTarget.Children.Add(n), dropTarget);
}
}
void IDropable.Drop(object data, DropLocation location)
{
var droppedElement = data as NodeItem;
if (droppedElement == null)
{
return;
}
var arg = new NodeDropRequest
{
DroppedNode = droppedElement.State.DataContext,
DropTarget = Root,
Location = location
};
if (DropCommand != null && DropCommand.CanExecute(arg))
{
DropCommand.Execute(arg);
}
}