<AWT Dev>  Review request for 8169133: This time, on Windows: java/awt/Robot/SpuriousMouseEvents/SpuriousMouseEvents.java
Sergey.Bylokhov at oracle.com
Mon Nov 28 20:13:26 UTC 2016
On 25.11.16 17:08, Semyon Sadetsky wrote:
>>>> Then JDK-8013116 was fixed the request for specification update was
>>>> created: https://bugs.openjdk.java.net/browse/JDK-8033128
>>> Different coordinate system simply means different coordinate origins.
>>> This is the most natural behavior for the robot created for certain
>> And if both screens have the same coordinate system simply means that
>> they have same coordinate origins.
> They may share the same extended screen coordinates but have different
If the same coordinate system is shared by both screens, means that each
point passed to the robot will be related to the(0,0). It is not
necessary the (left/top) point of the screen because the screen itself
can be shifted from the (0,0)/
> If you switch off Xinerama on Linux, not sure that this is well
> supported by default desktop shell, anyway, then you can run an app on
> the second monitor using DISPLAY=:0.1.
> If this app creates robot for the current screen it acts in the 2nd
> screen coordinates according to the spec.
The whole application will use the coordinate system of the second
monitor, because this is separate standalone screen.
> The same app can be run on the usual extended desktop and then moved to
> the second screen. In this case, the robot created for the current
> screen should act in 2nd screen coordinates as well, otherwise behavior
> of the app would be different and depend on the native platform
The robot should always use the coordinate system of the screen, in the
same way as TopLevel windows use it.
>>> I didn't see a desktop within the OSes supported by JDK9 where multiple
>>> screens are treated as a separate displays rather then one extended
>> Such configurations exists, even if default configs supported by
>> Oracle have Xinerama does not mean that it was not supported in past,
>> and is not supported by OpenJDK in general.
>>> It seems JDK-8013116 should be reworked to correspond to the current
>>> state of multiscreen concept on the supported platforms.
Best regards, Sergey.
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