<AWT Dev> [8] Review Request: JDK-8024163 [macosx] NullPointerException at javax.swing.TransferHandler$DropHandler.handleDrag since jdk8b93, 7u40b28

[Petr Pchelko]

Hello, AWT Team.

Please review the updated version of this fix. 
It's available at: http://cr.openjdk.java.net/~pchelko/8024163/webrev.01/

I have changed the dragExit events generation a bit and added a couple of tests.

With best regards. Petr.

On Sep 24, 2013, at 6:30 PM, Petr Pchelko <petr.pchelko at oracle.com> wrote:

> Hello, AWT Team.
> 
> Please review the fix for the following issue:
> https://bugs.openjdk.java.net/browse/JDK-8024163
> The fix is available here:
> http://cr.openjdk.java.net/~pchelko/8024163/webrev.00/
> 
> The problem is with the DropTarget Enter/Exit events. For real heavyweights they are generated by native code. For lightweights - in shared code. But for AWT components they should be generated in CDropTargetContextPeer.
> Before the fix these events could be generated incorrectly: sometimes duplicated events were sent (this broke autoscrolling) and sometimes events were not sent at all - this caused NPEs in the shared code.
> The insideTarget boolean was replaced by a reference to DropTarget to handle nested components correctly.
> 
> Tested on Mac OS X (no shared code affected). 
> No new regression test failures.
> 
> With best regards. Petr.
> 
>