<Swing Dev> [9] Review request for 8027639: JComboBox's popup leaves tracks after closing

[Alexandr Scherbatiy]

On 10/10/2016 12:55 PM, Semyon Sadetsky wrote:
> Hello,
>
> Please review fix for JDK9:
>
> bug: https://bugs.openjdk.java.net/browse/JDK-8027639
>
> webrev: http://cr.openjdk.java.net/~ssadetsky/8027639/webrev.00/
>
> When the Swing repaint manager paints Swing to a separate off-screen 
> buffer the root window is not painted. So in case of non-opaque root 
> window having transparent background the repainted buffer area 
> transparency is not restored and previously visible Swing components 
> can remain visible.
>
> The solution is to paint the root window's background to the repainted 
> area in case the root window is non-opaque.
   Should the previous composite be restored after the rect filling?

   Thanks,
   Alexandr.
>
> --Semyon
>