JFormDesigner/FlatLaf 3.5.2 on GitHub

Change Log

Windows: Fixed repaint issues (ghosting) on some systems (probably depending
on graphics card/driver). This is done by setting Java system property
sun.java2d.d3d.onscreen to false (but only if sun.java2d.d3d.onscreen,
sun.java2d.d3d and sun.java2d.noddraw are not yet set), which disables
usage of Windows Direct3D (DirectX) onscreen surfaces. Component rendering
still uses Direct3D. (issue #887)
FlatLaf window decorations:
- Iconify/maximize/close buttons did not fill whole title bar height, if some
  custom component in menu bar increases title bar height. (issue #897)
- Windows: Fixed possible application freeze when using custom component that
  overrides Component.contains(int x, int y) and invokes
  SwingUtilities.convertPoint() (or similar) from the overridden method.
  (issue #878)
TextComponents: Fixed too fast scrolling in multi-line text components when
using touchpads (e.g. on macOS). (issue #892)
ToolBar: Fixed endless loop if button in Toolbar has focus and is made
invisible. (issue #884)

FlatLaf window decorations: Added client property JRootPane.titleBarHeight
to allow specifying a (larger) preferred height for the title bar. (issue #897)
Added system property flatlaf.useRoundedPopupBorder to allow disabling
native rounded popup borders on Windows 11 and macOS. On macOS 14.4+, where
rounded popup borders are disabled since FlatLaf 3.5 because of occasional
problems, you can use this to enable rounded popup borders (at your risk).