[NETBEANS-5723] Spurious "Set sun.java2d.noddraw=true to enable transparent windows" exception in IDE log

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 12.2
• Fix Version/s: Next
• Component/s: platform - Window System
• Labels: pull-request-available

Environment

Windows 10 on OpenJDK 11.0.11.

• Assignee: Eirik Bakke
• Reporter: Eirik Bakke
• Created: 27/May/21 16:02
• Updated: 31/May/21 18:34
• Resolved: 31/May/21 18:34

Description

On Windows, when dragging window system tags with the mouse, the following spurious error message may appear on the console running the NetBeans IDE or a NetBeans Platform application:

INFO [org.netbeans.core.nativeaccess.NativeWindowSystemImpl]
java.lang.UnsupportedOperationException: Set sun.java2d.noddraw=true to enable transparent windows
	at com.sun.jna.platform.WindowUtils$W32WindowUtils.setWindowAlpha(WindowUtils.java:796)
	at com.sun.jna.platform.WindowUtils.setWindowAlpha(WindowUtils.java:1940)
[catch] at org.netbeans.core.nativeaccess.NativeWindowSystemImpl.setWindowAlpha(NativeWindowSystemImpl.java:88)
	at org.netbeans.core.windows.view.dnd.DragAndDropFeedbackVisualizer.createDragWindow(DragAndDropFeedbackVisualizer.java:89)
	at org.netbeans.core.windows.view.dnd.DragAndDropFeedbackVisualizer.start(DragAndDropFeedbackVisualizer.java:110)
	at org.netbeans.core.windows.view.dnd.TopComponentDragSupport.doStartDrag(TopComponentDragSupport.java:402)
	at org.netbeans.core.windows.view.dnd.TopComponentDragSupport.eventDispatched(TopComponentDragSupport.java:327)
	at java.desktop/java.awt.Toolkit$SelectiveAWTEventListener.eventDispatched(Toolkit.java:2194)
	at java.desktop/java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java:2086)
	at java.desktop/java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java:2085)
	at java.desktop/java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java:2085)
	at java.desktop/java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java:2085)
	at java.desktop/java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java:2085)
	at java.desktop/java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java:2085)
	at java.desktop/java.awt.Toolkit.notifyAWTEventListeners(Toolkit.java:2042)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4917)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4843)
	at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918)
	at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4564)
	at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2772)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4843)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:772)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:743)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
	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)

The tab preview window that is shown next to the mouse cursor is actually transparent as intended.

Issue Links

• links to: GitHub Pull Request #2980