<AWT Dev> [9] Review request for 8163101: dual-screen issue with JMenu, JPopupMenu

Sergey Bylokhov Sergey.Bylokhov at oracle.com
Wed Sep 28 19:54:34 UTC 2016

On 23.09.16 21:39, Semyon Sadetsky wrote:
>> Just check what value will be returned if the system have two displays
>> and each will have own scale, the result will be downscaled based on
>> default config.
> Did you really try this? Because I did not see any Linux within the
> supported ones that allows this. Would be nice if you could share info
> how to get different scales for two monitors.

It is not necessary to check, it is obvious from the code. It is broken 
in this case.

>> We have two bugs:
>>  - This bug is about menu related code, it should care about bounds of
>> gc where these popup will be shown, it should not use the method which
>> return the bounds of the primary screen. In current fix the location
>> will be incorrect if Xinerama is disabled and menu will be shown on
>> non-primary screen, if this screen have different scale from main
>> display.
> If Xinerama is disabled the method will return the primary screen size
> which is your favorite one.

But the popup should use the bounds from the screen where they will be 
shown, which is not necessary the main.

>>  - The toolkit method should be reworked.
> It as an open question at least for 9. I can file a bug if you want.

Toolkit bug is unrelated to this so its up to you. But the fix is quite 

Best regards, Sergey.

More information about the awt-dev mailing list