Eirik Bakke created NETBEANS-2646:
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Summary: 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
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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