On 06/07/2018 01:33, Krishna Addepalli wrote:
3. There are some scaling combinations, like (1.75 * 2.5) monitor scaling, and 
java uiScaling 1.25/1.5 which are failing.

But why it does not work in these combinations? Do we have some round errors in logic which converts pixels to units?


So, I have added back the uiScaling tests, and here is the new webrev: 
http://cr.openjdk.java.net/~kaddepalli/8176359/webrev03/

Thanks,
Krishna

-----Original Message-----
From: Sergey Bylokhov
Sent: Thursday, July 5, 2018 7:54 PM
To: Krishna Addepalli <krishna.addepa...@oracle.com>; swing-dev@openjdk.java.net
Subject: Re: <Swing Dev> [11] RFR:JDK-8176359: Frame#setMaximizedbounds not 
working properly in multi screen environments

On 05/07/2018 14:38, Krishna Addepalli wrote:
Hi Sergey,

1. If I add the scaling, the test will always fail, even though it passes for 
scale = 1, it will fail for other values (1.25, 1.5, 1.75).

What is the reason of the failure?

2. Yes, I have added code to get the current screen on which the point lies, 
and use the scale of that screen.
3. Thanks for pointing that out, fixed it in the new webrev.

Here is the new webrev:
http://cr.openjdk.java.net/~kaddepalli/8176359/webrev02/

Thanks,
Krishna

-----Original Message-----
From: Sergey Bylokhov
Sent: Saturday, June 30, 2018 1:40 AM
To: Krishna Addepalli <krishna.addepa...@oracle.com>;
swing-dev@openjdk.java.net
Subject: Re: <Swing Dev> [11] RFR:JDK-8176359:
Frame#setMaximizedbounds not working properly in multi screen
environments

Hi, Krishna.
Also, while running the testcase, I discovered that the
-Dsun.java2d.uiScale=1.25 will uniformly apply the scaling across all
the screens, whereas if the underlying monitor is not scaled, the
results will be different.

Hence I modified the test to remove the uiScale settings related tests.

I suggest to add it back. The case when the bug can be reproduced depends from 
the real screen resolution. If such resolution is set then the bug should not 
depend from the scales of the screens, because internally we will convert the 
scaled coordinates to the real pixels and it does not matter what scale is used 
in java.

There some questionable places in the fix:
    - 106 b = scaleBounds(b, currScaleX, currScaleY); Why the scale of the current screen 
is used? I guess we need to find on which screen this "b"
is located and then use its scale. Check implementation of
WWindowPeer.setBounds()

    - Is it intentional to assign to "b" a values from "primaryDevBounds", which was not 
scaled? So in some cases the "b" will have scaled values and in some cases not.
       125                 b.width = primaryDevBounds.width;
       130                 b.height = primaryDevBounds.height;
       134                 b.x = primaryDevBounds.x;
       138                 b.y = primaryDevBounds.y;


--
Best regards, Sergey.



--
Best regards, Sergey.



--
Best regards, Sergey.

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