Recently I worked on CEImagesetEditor.
And I met a strange clipping issue.
Two methods can make it happen:
1.Use mouse wheel to zoom in the imageset you've created. When either elastic box is partially outside the display window,
drag the window in order to make the box to show up. You'll see the box been clipped by sth., like this:
zoom in

and drag right side of display window, box has been clipped...

2.Use scroll bar to make the box outside display window as method 1, also can reproduce it.
And sth.is even stranger that after the box been clipped, move the scroll bar, the box will become back to normal...

I tried to solve this problem but only find during the change the gui sheet rendering surface has not redrawn.
If this is true, is that the OpenGL renderer to be blamed?
Anyone can help?