[vtkusers] Swing Based vtkPanel

[anast.jm at pg.com]

Jeff,

WinNT4 sp6, vtk4 cvs from 2/27/2002 java sdk 1.3.1_02.

I compiled and ran SimpleVTK from the dos command line and get the error
below.....john


                                                                
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From: Jeff Lee <jeff at cdnorthamerica.com> on 03/05/2002 10:42 AM
                                                                                
                  Jeff Lee           To:   John Anast-JM/PGI at PGI                
 <jeff at cdnorthamerica.com>           Cc:   vtkusers at public.kitware.com          
                             Subject:      Re: [vtkusers] Swing Based vtkPanel  
                                                                                
       03/05/2002 10:42 AM                                                      
                                                                                
                                                                                




It works fine for me - on win2000, SunOS, linux.  I have never heard of
this problem before on win2k systems.  What are your details - os, vtk
version, etc...  I added the lock/unlock mechanism to allow native code
to call render/makeCurrent/other calls which affect the drawing surface.
-Jeff

anast.jm at pg.com wrote:

>Satheesh....I'm not even getting that far with SimpleVTK......the window and
>button display okay but even if I do nothing the app crashes in 1 sec...just
too
>new to figure this out on my own...john
>
>An unexpected exception has been detected in native code outside the VM.
>Unexpected Signal : EXCEPTION_ACCESS_VIOLATION occurred at PC=0x77f67616
>Function name=RtlLeaveCriticalSection
>Library=C:\WINNT\System32\ntdll.dll
>
>Current Java thread:
>        at vtkPanel.UnLock(Native Method)
>        at vtkPanel.Render(vtkpanel.java:82)
>        at vtkPanel.paint(vtkpanel.java:90)
>        at sun.awt.RepaintArea.paint(Unknown Source)
>        at sun.awt.windows.WComponentPeer.handleEvent(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.pumpOneEventForHierarchy(Unknown
Source)
>
>        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
>        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
>        at java.awt.EventDispatchThread.run(Unknown Source)
>
>
>
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> Received from host:      public.kitware.com
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>
>
>From: Satheesh Maheswaran <s.maheswaran at eastman.ucl.ac.uk>@public.kitware.com
on
>03/05/2002 03:23 PM GMT
>
>                                 Satheesh Maheswaran           To:
"Gopalakrishnan, Gowri"
> <s.maheswaran at eastman.ucl.ac.uk>@public.kitware.com
<Gowri.Gopalakrishnan at inteq.com>
>                                                               Cc:
"'da5y-ngmn at asahi-net.or.jp'"
>
<da5y-ngmn at asahi-net.or.jp>,
>         Sent by:  vtkusers-admin at public.kitware.com
vtkusers at public.kitware.com (bcc: John
>                                 03/05/2002 10:23 AM        Anast-JM/PGI)
>                                                       Subject:      Re:
[vtkusers] Swing Based vtkPanel
>
>
>
>
>
>
>hello users
>
>I am trying to get vtkPanel.java work with SimpleVTK.java given with VTK. Its
in
>vtk/wrapping/java
>
>All works, and the panel gets displayed with cone and an exit button.  Here awt
>and swing
>components are mixed, and the vtkPanel.java extends Canvas, which I think is
>awt.
>
>So when i run it and try to interact with it, all key events work and the exit
>button work,
>but when trying the mouse events. like zooming, it crashes :)
>
>has anyone come across the same problem !!! or may be even a solution for the
>problem !!
>
>satheesh
>
>"Gopalakrishnan, Gowri" wrote:
>
>>If you look in the sun's web site on JNI (java native interface) and the
>>native code for vtkPanel.java you will see that they are quite identical.
>>It used to be that you could grab drawing surface information and the window
>>handle only from canvas (it is a undocumented codes in jdk). But I have come
>>across something similar in Swing. In vtk 3.2 it is done using canvas, but
>>in vtk4.0 I do not know. You cannot use anything else other than canvas (now
>>a swing component - I forgot which )to get this information from sun's jdk.
>>
>>Also with your swing problem - even if you got it to work now you might end
>>up with strange behaviours in swing components when they are put on the awt
>>component. Event handling especially can be troublesome. If you have not
>>done too much dev. already it is a good/wise idea to change to completely
>>swing. Mixing awt and swing leads to frustration.
>>
>>Gowri
>>
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