Remove the need for “Disable HiDPI Scaling” on Windows

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Created by: benfry

As a temporary resolution for #226, 4.0 beta 3 includes an option in Preferences (on Windows) to disable HiDPI scaling. This makes the UI behave properly, but is a temporary workaround because it leaves things fuzzy and still requires users to find the option.

Unfortunately, detecting when it's necessary to select this option is extremely difficult, and it appears, cannot be done consistently. If this sticks around much longer, maybe we can add a dialog box that suggests using the option.

See also #231.

[processing-bot]

Created by: benfry

Based on further comments in #226, this seems to come down to the editor cursor position offset to the right with fractional Windows scaling. It's not a low- or high-res issue specifically, it's just that the metrics are a little funky when not using an even multiple like 200%.

Luckily, that's easier to detect, though JEditSyntax sure is killing us here. (But can't do a jump to RSyntaxArea without breaking all Modes from 3.x…)

It's also an issue with our custom components (EditorHeader and EditorFooter) which are stretched and pixelated when using strange fractions.

[processing-bot]

Created by: benfry

Reference links:

• JEP 263: HiDPI Graphics on Windows and Linux
  • http://openjdk.java.net/jeps/263
• Using sun.java2d.win.uiScale.enabled, sun.java2d.win.uiScaleX, and sun.java2d.win.uiScaleY
  • https://news.kynosarges.org/2019/03/24/swing-high-dpi-properties/
• IntelliJ dealing with the same issues
  • rollup of all IDEA issues: https://youtrack.jetbrains.com/issue/IDEA-180962
  • https://youtrack.jetbrains.com/issue/JBR-3757
  • https://github.com/JetBrains/intellij-community/blob/master/platform/util/ui/src/com/intellij/ui/scale/ScaleType.java
  • https://intellij-support.jetbrains.com/hc/en-us/articles/115001260010-Troubleshooting-IDE-scaling-DPI-issues-on-Windows
  • https://youtrack.jetbrains.com/issue/JBR-427

[processing-bot]

Created by: benfry

With the last three commits, I think we have the Windows scaling issue resolved for 4.0 beta 4.

[processing-bot]

Created by: benfry

More fixes for this coming in beta 5 if anyone runs into trouble…

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Created by: github-actions[bot]

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