How to add a function to response the node drag event in DiagramSurface.

HI, Jason

I want to add a function to response the  node drag event in  DiagramSurface.

However, i can not find the drag Event  in DiagramSurface Class memeber  Online.



How can i do this.

Thank you!

Andrew

Hi Andrew,

This can be done by adding a handler to the DiagramSurface instance as follows (where ds is the DiagramSurface):

ds.AddHandler(Thumb.DragDeltaEvent, new DragDeltaEventHandler(OnThumbDragged));

This will be called by all Thumb controls, so in the handler you'll want check that it came from a MoveThumb - meaning that a node is being dragged:

private void OnThumbDragged(object sender, DragDeltaEventArgs e)
{
  if (e.OriginalSource is MoveThumb)
  {

  }
}

Let me know if that works for you.

-Jason Fauchelle