On Fri, 12 Feb 2021 21:53:05 GMT, Olga Mikhaltsova <omikhaltc...@openjdk.org>
wrote:
>> src/java.desktop/unix/classes/sun/awt/X11/XDnDDropTargetProtocol.java line
>> 618:
>>
>>> 616: try {
>>> 617: for (int i = 0; i < gdslen; i++) {
>>> 618: long screenRoot = XlibWrapper.RootWindow(display,
>>> i);
>>
>> I am not sure this will work in the multi-monitors configuration when the
>> screen is split across a few monitors(when Xinerama is enabled for example).
>> In such a configuration, only one root window and only one X11 screen exist.
>> And the index of the GraphicsDevice is the index of the "virtual" monitor,
>> so you cannot pass this index to the "XlibWrapper.RootWindow".
>>
>> A few questions:
>> * Are you sure that to scale the x/y in the device space you need to find
>> where the pointer is located? And not where the x/y coordinates are located
>> themselves?
>> * Did you try to iterate over the devices->downscale the bounds of each GD
>> to the device scale and upscale the x/y using the selected device. Such
>> utility method can be added to the SunGraphicsEnvironment
>
> Sergey, thanks for the hint! Hope I understand you right. Please, review my
> changes!
>
> I decided to do necessary scaling in place and not to add an utility method
> to SunGraphicsEnvironment due to the following doubts:
> the methods from SunGraphicsEnvironment can be called from different OS and
> I'm going to use GraphicsConfig::getBounds() but I see that the Unix
> implementation includes downscaling (X11GraphicsConfig::getBounds(),
> src/java.desktop/unix/classes/sun/awt/X11GraphicsConfig.java) and the Windows
> one is not (Win32GraphicsConfig::getBounds(),
> src/java.desktop/windows/classes/sun/awt/Win32GraphicsConfig.java);
> so for Unix I need upscaling before checking the point position but for
> Windows it is not needed.
> Please, correct me if I'm wrong!
>
> Concerning my previous implementation based on the cursor position, would you
> be so kind to take a look at XMouseInfoPeer::fillPointWithCoords(..)
> (src/java.desktop/unix/classes/sun/awt/X11/XMouseInfoPeer.java) in order to
> check whether it should be also fixed?
Yes, I think the fillPointWithCoords is also broken.
I'll run the tests for this change.
-------------
PR: https://git.openjdk.java.net/jdk/pull/1907
