[Springframework-rcp-dev] [Spring-JIRA] Created: (RCP-482) VLDocking throws a NullPointerException, on closing a duplicate window

[Tobias V. (JIRA) <no...@at...>]

VLDocking throws a NullPointerException, on closing a duplicate window
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                 Key: RCP-482
                 URL: http://opensource.atlassian.com/projects/spring/browse/RCP-482
             Project: Spring Framework Rich Client Project
          Issue Type: Bug
          Components: Application Framework
         Environment: Windows XP SP2, Java 1.5, Spring-RCP 0.3.0-SNAPSHOT current SVN Head (Revision 1785)
            Reporter: Tobias Vogel


I integrated VLDocking into my application. So far it works pretty well, besides one thing:

- I open the application with one (or multiple) views (described in the context by VLDockingViewDescriptor") open
- I choose the "NewWindowCommand" from the window menu (already integrated in a vanilla rcp project)
- I then again try to close the window again which leads to the NullPointerException

The relevant line in the DockViewTitleBar (see stacktrace below) looks like this:
> tb.target.getDockKey().setNotification(false);

Seems like the dock keys don't get duplicated while duplicating the windows, as the original window doesn't show this behaviour.

Here's the stacktrace:
[ERROR,MessagesDialogExceptionHandler,AWT-EventQueue-0] Uncaught throwable handled
java.lang.NullPointerException
	at com.vlsolutions.swing.docking.DockViewTitleBar$FocusHighlighter.propertyChange(DockViewTitleBar.java:743)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:347)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
	at java.awt.KeyboardFocusManager.firePropertyChange(KeyboardFocusManager.java:1387)
	at java.awt.KeyboardFocusManager.setGlobalFocusOwner(KeyboardFocusManager.java:525)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:469)
	at java.awt.Component.dispatchEventImpl(Component.java:4282)
	at java.awt.Container.dispatchEventImpl(Container.java:2116)
	at java.awt.Component.dispatchEvent(Component.java:4240)
	at java.awt.KeyboardFocusManager.processCurrentLightweightRequests(KeyboardFocusManager.java:2590)
	at java.awt.KeyboardFocusManager.retargetFocusEvent(KeyboardFocusManager.java:2837)
	at java.awt.Component.dispatchEventImpl(Component.java:4275)
	at java.awt.Container.dispatchEventImpl(Container.java:2116)
	at java.awt.Window.dispatchEventImpl(Window.java:2429)
	at java.awt.Component.dispatchEvent(Component.java:4240)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
	at java.awt.SequencedEvent.dispatch(SequencedEvent.java:98)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:177)
	at java.awt.Dialog$1.run(Dialog.java:1039)
	at java.awt.Dialog$3.run(Dialog.java:1091)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.awt.Dialog.show(Dialog.java:1089)
	at javax.swing.JOptionPane.showOptionDialog(JOptionPane.java:853)
	at org.springframework.richclient.exceptionhandling.AbstractDialogExceptionHandler.notifyUserAboutException(AbstractDialogExceptionHandler.java:77)
	at org.springframework.richclient.exceptionhandling.AbstractLoggingExceptionHandler.uncaughtException(AbstractLoggingExceptionHandler.java:48)
	at org.springframework.richclient.exceptionhandling.delegation.AbstractExceptionHandlerDelegate.uncaughtExceptionPurged(AbstractExceptionHandlerDelegate.java:70)
	at org.springframework.richclient.exceptionhandling.delegation.AbstractExceptionHandlerDelegate.uncaughtException(AbstractExceptionHandlerDelegate.java:66)
	at org.springframework.richclient.exceptionhandling.delegation.DelegatingExceptionHandler.uncaughtException(DelegatingExceptionHandler.java:66)
	at org.springframework.richclient.exceptionhandling.AwtExceptionHandlerAdapterHack.handle(AwtExceptionHandlerAdapterHack.java:48)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at java.awt.EventDispatchThread.handleException(EventDispatchThread.java:389)
	at java.awt.EventDispatchThread.processException(EventDispatchThread.java:295)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:287)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

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