private void SuperTypeTree_MouseMove(object sender, MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
Point currentPosition = e.GetPosition(SuperTypeTree);
// Note: This should be based on some accessibility number and not just 2 pixels
if ((Math.Abs(currentPosition.X - _lastMouseDown.X) > 2.0) ||
(Math.Abs(currentPosition.Y - _lastMouseDown.Y) > 2.0))
{
var selectedItem = (DmSuperTyp)SuperTypeTree.SelectedItem;
{
TreeViewItem container = GetContainerFromSuperType(selectedItem);
if (container != null)
{
DragDropEffects finalDropEffect = DragDrop.DoDragDrop(container, selectedItem, DragDropEffects.Move);
if ((finalDropEffect == DragDropEffects.Move) && (_targetSuperType != null))
{
// A Move drop was accepted
selectedItem.Move(_targetSuperType);
//selectedItem.Parent.Childs.Remove(selectedItem);
//_targetSuperType.Childs.Add(selectedItem);
_targetSuperType = null;
}
}
}
}
}
}
private TreeViewItem GetContainerFromSuperType(DmSuperTyp superType)
{
var _stack = new Stack <DmSuperTyp>();
_stack.Push(superType);
var parent = superType.Parent;
while (parent != null)
{
_stack.Push(parent);
parent = parent.Parent;
}
ItemsControl container = SuperTypeTree;
while ((_stack.Count > 0) && (container != null))
{
var top = _stack.Pop();
container = (ItemsControl)container.ItemContainerGenerator.ContainerFromItem(top);
}
return(container as TreeViewItem);
}
private void SuperTypeTree_Drop(object sender, DragEventArgs e)
{
e.Effects = DragDropEffects.None;
e.Handled = true;
// Verify that this is a valid drop and then store the drop target
TreeViewItem container = GetNearestContainer(e.OriginalSource as UIElement);
if (container != null)
{
var sourceSuperType = (DmSuperTyp)e.Data.GetData(typeof(DmSuperTyp));
var targetSuperType = (DmSuperTyp)container.Header;
if ((sourceSuperType != null) && (targetSuperType != null))
{
if (!targetSuperType.Childs.Contains(sourceSuperType))
{
_targetSuperType = targetSuperType;
e.Effects = DragDropEffects.Move;
}
}
}
}
