<AWT Dev> RFR: 8225126 Test SetBoundsPaintTest.html faild on Windows when desktop is scaled

Sergey Bylokhov Sergey.Bylokhov at oracle.com
Thu Feb 6 20:41:10 UTC 2020

On 2/6/20 12:24 pm, Alexey Ivanov wrote:
>> I am not sure that this constant is related to the primary monitor
>> only. The spec for SM_CYBORDER does not mention the primary monitor
>> like some others SM_CYMAXIMIZED/SM_CYSCREEN etc.
> It's stated here:
> https://docs.microsoft.com/en-us/windows/win32/gdi/multiple-monitor-system-metrics
> The GetSystemMetrics function returns values for the primary monitor, except for SM_CXMAXTRACK and SM_CYMAXTRACK, which refer to the entire desktop. …
Then we will need to find some alternatives to GetSystemMetrics which is used a lot.

>> We use this value as-is for all monitors, in java we scale value
>> and if passed back to native we convert it again by ScaleUpY like in
>> resetDropDownHeight().
> Does it mean ScaleDownY at line 233 is not required then?

The GetTotalHeight() is used at line 316 where the user's space coordinate are expected.

> Or the fact that we scale the value in Java means we have to scale the value obtained from the native, right?

All values which are obtained from native should be scaled before using, since
java operates in the user's space coordinates. But we still have lots of
places where this scaling is missing.

Best regards, Sergey.

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