[vtkusers] Swing Based vtkPanel

[Gopalakrishnan, Gowri]

i am using windows 2000, and vtk3.2. If you run the *.java from command line
everything is fine. But if you are using a windows IDE then it will be a
problem. I have seen a lot of posting on this issue In public user groups
(not connected with vtk, but related to JNI)
Since this runs from command prompt with out problem it is not a java/native
interface problem. It is some IDE problem. So I don't mind.... 

Gowri


-----Original Message-----
From: Jeff Lee [mailto:jeff at cdnorthamerica.com] 
Sent: 05 March 2002 15:42
To: anast.jm at pg.com
Cc: vtkusers at public.kitware.com
Subject: Re: [vtkusers] Swing Based vtkPanel

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                    
> [208.136.18.25]                                                
>                                                                
>
>
>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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