When thumbnails are rendered the background images are not visible

[kuenzign]

While the background images are visible on the InkCanvas, they are not visible 
when a thumbnail bitmap image is rendered.

The code that is actually executing this is currently located within the 
DPXGrader and DPXAnswers project, but should be moved into the DPXReader 
library once the problem has been resolved.

Original issue reported on code.google.com by jjhatf02 on 4 Aug 2010 at 5:01

[kuenzign]

After extensive research and testing, I still have no clue why the thumbnails 
do not have their children rendered.  DPXPreview properly generates an image 
using the same approach and the children and correctly displayed.  The 
underlying cause is related to the fact the children are not being displayed.  
Even when these UIElements, specific the Image, is explicitly rendered, nothing 
shows up!

Original comment by jjhatf02 on 4 Aug 2010 at 6:29

[kuenzign]

This issue was updated by revision r226.

The common  code to generate thumbnails has been moved into the DPXReader 
library.

Original comment by jjhatf02 on 4 Aug 2010 at 6:41