[vtkusers] VTKPanel +Swing - repainting issue

Markus Ott ott-markus at t-online.de
Tue Jun 22 08:05:51 EDT 2010 

What i do actually:

I override paintComponent of my infoPanel as follows:

public void paintComponent(Graphics g){
		
	repaint();
}

You will find a screenshot attached.
This is all it needs to gray out the vtkCanvas.

I get the following when i click on it and try to move with pressed
mouse button:

--------------------------------------------------------------------------
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at vtk.vtkPanel.UpdateLight(vtkPanel.java:211)
	at vtk.vtkCanvas.mouseDragged(vtkCanvas.java:230)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at vtk.vtkPanel.UpdateLight(vtkPanel.java:211)
	at vtk.vtkCanvas.mouseDragged(vtkCanvas.java:230)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at vtk.vtkPanel.UpdateLight(vtkPanel.java:211)
	at vtk.vtkCanvas.mouseDragged(vtkCanvas.java:230)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at vtk.vtkPanel.UpdateLight(vtkPanel.java:211)
	at vtk.vtkCanvas.mouseDragged(vtkCanvas.java:230)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at vtk.vtkPanel.UpdateLight(vtkPanel.java:211)
	at vtk.vtkCanvas.mouseDragged(vtkCanvas.java:230)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at vtk.vtkPanel.UpdateLight(vtkPanel.java:211)
	at vtk.vtkCanvas.mouseDragged(vtkCanvas.java:230)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at vtk.vtkPanel.UpdateLight(vtkPanel.java:211)
	at vtk.vtkCanvas.mouseDragged(vtkCanvas.java:230)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at vtk.vtkPanel.UpdateLight(vtkPanel.java:211)
	at vtk.vtkCanvas.mouseDragged(vtkCanvas.java:230)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at vtk.vtkPanel.UpdateLight(vtkPanel.java:211)
	at vtk.vtkCanvas.mouseDragged(vtkCanvas.java:230)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at vtk.vtkPanel.UpdateLight(vtkPanel.java:211)
	at vtk.vtkCanvas.mouseDragged(vtkCanvas.java:230)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at vtk.vtkPanel.UpdateLight(vtkPanel.java:211)
	at vtk.vtkCanvas.mouseDragged(vtkCanvas.java:230)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at vtk.vtkPanel.UpdateLight(vtkPanel.java:211)
	at vtk.vtkCanvas.mouseDragged(vtkCanvas.java:230)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at vtk.vtkPanel.UpdateLight(vtkPanel.java:211)
	at vtk.vtkCanvas.mouseDragged(vtkCanvas.java:230)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at vtk.vtkPanel.UpdateLight(vtkPanel.java:211)
	at vtk.vtkCanvas.mouseDragged(vtkCanvas.java:230)
	at java.awt.Component.processMouseMotionEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Jerome Robert schrieb:
> Do you call repaint from the EDT ?
> 
> Could you give the stack of you NullPointerException ?
> 
>> ----- Message d'origine -----
>> De : Markus Ott
>> Envoyés : 22.06.10 11:28
>> À : Jerome Robert
>> Objet : Re: [vtkusers] Re : VTKPanel +Swing - repainting issue
>>
>> Hi Jerome,
>>
>> thank you for your quick reply.
>> The application is running on a Windows Vista machine.
>>
>> I use a simple BorderLayout with vtkPanel at BorderLayout.CENTER and the
>> infoPanel at BorderLayout.LINE_START.
>>
>> Overriding removeNotify() as in http://www.vtk.org/Bug/view.php?id=7107
>> doesn't help here.
>>
>> Jerome Robert schrieb:
>>> On Windows, running your Java application with -Dsun.java2d.ddoffscreen=false -Dsun.java2d.gdiblit=false may help removing the flickering effect.
>>>
>>> I don't think it's a lightweight/heavyweight problem as one panel is not hidding an other. It could be related to http://www.vtk.org/Bug/view.php?id=7107
>>>
>>> Which layout do you use in your main JPanel ?
>>>
>>> Jerome
>>>
>>>> ----- Message d'origine -----
>>>> De : Markus Ott
>>>> Envoyés : 21.06.10 18:28
>>>> À : vtkusers at vtk.org
>>>> Objet : [vtkusers] VTKPanel +Swing - repainting issue
>>>>
>>>> Hello vtkusers!
>>>>
>>>> I'm using VTK within Java. I have a simple layout with a JPanel
>>>> containing another information panel on the left side and a vtkPanel on
>>>> the right side.
>>>>
>>>> When i'm trying to override paintComponent()-methods of my infoPanel and
>>>> call the repaint() method the whole program's visual representation
>>>> messes up. I.e. i have only black and grey representations of my gui
>>>> elements and vtkPanel isn't usable any more (if i click it i get a
>>>> nullPointerException).
>>>>
>>>> I think it has something to do with mixing lightweight and heavyweight
>>>> components within java.
>>>>
>>>> Also the vtkPanel is flickering while resizing the window or if other
>>>> programs are on top of it. I think this may be based upon the same problem.
>>>>
>>>> Has anybody an idea what to do?
>>>>
>>>> Regards,
>>>> Markus
>>> _______________________________________________
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>>>
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>>>
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> _______________________________________________
> Powered by www.kitware.com
> 
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
> 
> Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
> 
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers

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