Popup menus that goes outside of parent window fail to open on platforms without compositing

[X547]

Tested on Netbeans 22.

java.lang.UnsupportedOperationException: PERPIXEL_TRANSLUCENT translucency is not supported
	at java.desktop/java.awt.Window.setBackground(Window.java:3897)
	at com.formdev.flatlaf.ui.FlatPopupFactory$DropShadowPopup.<init>(FlatPopupFactory.java:623)
	at com.formdev.flatlaf.ui.FlatPopupFactory.getPopup(FlatPopupFactory.java:119)
	at java.desktop/javax.swing.plaf.PopupMenuUI.getPopup(PopupMenuUI.java:71)
	at com.formdev.flatlaf.ui.FlatPopupMenuUI.getPopup(FlatPopupMenuUI.java:216)
	at java.desktop/javax.swing.JPopupMenu.showPopup(JPopupMenu.java:853)
	at java.desktop/javax.swing.JPopupMenu.setVisible(JPopupMenu.java:806)
	at java.desktop/javax.swing.JPopupMenu.show(JPopupMenu.java:980)
	at org.netbeans.editor.EditorUI.showPopupMenu(EditorUI.java:1813)
	at org.netbeans.editor.EditorUI$7.run(EditorUI.java:1725)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:771)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:722)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:716)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:741)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
[catch] at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

[DevCharly]

...fail to open on platforms without compositing

More details please.

Windows 10, 11, Linux or macOS?
And how to disable "compositing" on affected platform?

[X547]

Linux KDE: https://askubuntu.com/questions/758250/how-to-deactivate-all-the-desktop-effects-of-kde-permanently

Haiku OS currently do not support compositing.

Problem do not appear on older versions of FlatLaf (bundled with Netbeans 11).

The best would be automatically detect that composition is not supported and disable shadows. Adding option to disable shadows is also acceptable.

Netbeans on Haiku:

[DevCharly]

fixed in latest 3.5.1-SNAPSHOT: https://github.com/JFormDesigner/FlatLaf#snapshots