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https://issues.apache.org/jira/browse/NETBEANS-2646?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eirik Bakke updated NETBEANS-2646:
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Attachment: BordersAfterPatch.png
> Improve border appearances with fractional HiDPI scaling factors
> ----------------------------------------------------------------
>
> Key: NETBEANS-2646
> URL: https://issues.apache.org/jira/browse/NETBEANS-2646
> Project: NetBeans
> Issue Type: Improvement
> Components: platform - Window System
> Affects Versions: 11.0
> Environment: Windows 10 with HiDPI monitor in fractional scaling mode
> (e.g. 150%), Java 9 and above
> Reporter: Eirik Bakke
> Assignee: Eirik Bakke
> Priority: Major
> Labels: HiDPI
> Attachments: BordersAfterPatch.png, BordersBeforePatch.png
>
>
> On Windows 10 systems with HiDPI monitors, it is possible to specify
> fractional DPI scaling factors, such as 150%. Some of the borders around
> components visible in the main NetBeans window end up looking ugly on this
> setting, because of rounding errors that cause a border 1 logical pixels wide
> to be painted as either 1 or 2 device pixels wide, depending on exactly where
> on the screen the border is drawn. This can be seen on Windows 10 with a 150%
> DPI scaling factor, by dragging the split pane between the "Projects" tab and
> the source code editor back and forth, and observing spurious changes in the
> surrounding borders. See the attached screenshot.
> I'll add a pull request to fix this in the most visible places, which is
> borders used in the NetBeans tab control. There are similar problems in other
> Swing components, e.g. JTextField, but that would have to be reported as a
> bug against the JDK's Windows LAF.
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