Customizing the Connection Manipulation Adorner

[Trevor]

I created a custom diagram shape style that has the content presenter above the shape. The shape looks great until I select it or attempt to create connections to it. I want the selection box only around the shape and not the text. The connectors are also not attached to the connection points on the shape. I have included some images of the issues I am seeing. I assume it has something to do with modifying the manipulation adorner to target the shape within the DiagramShape rather than the entire DiagramShape.

[Martin Ivanov]

Hello Trevor,

The reported behavior is expected. The shape bounds include everything in the shape's template regardless the position of its geometry. 

I can suggest couple of approaches for achieving your requirement. 

• The first one is to use two separated shapes - one for the shape's geometry (the rectangle) and another one for the label above. Then you can sync the Position of both the shapes and cancel the selection for the one with the label.
• The second approach is to manually update the boundaries of the manipulation adorner. You can do that via the AdornerService class. For example:
  

  private void radDiagram_SelectionChanged(object sender, SelectionChangedEventArgs e)
  {
      AdornerService adornerService = this.diagram.ServiceLocator.GetService<IAdornerService>() as AdornerService;
      adornerService.UpdateAdornerBounds(new Point(0, 10), 0, -10);
  }

  This will offset the manipulation adorner with 10 pixels on Y and reduce its height with 10px. Here you can use the size of the ContentPresenter that show the label in the shape and 

I hope this helps.

Regards,
Martin Ivanov
Progress Telerik