Re: [gl4java-usergroup] Destroying and Creating canvases in a single window ? ? ?

[Tobias L. G. <tg...@ul...>]

Florent,

I should have mentioned that you HAVE
to use the version of GL4Java that is on
SourceForge CVS.  Are you using this
version ? ? ?

If not you should go to this CVS and
do a check out and build GL4Java
from the sources.  Then calling
cvsDispose() BEFORE removing the
GLCanvas will work for you.

                  Peace, Love and Hair Grease,

                                      -TOBY

Florent Geffroy wrote:

>Oops, I sent my reply to Tobias directly, my mistake,
>so here is the mail :
>
>Hi !
>
>Actually, the "glgDestroy Failed" occured when I
>called cvsDispose ! I tried everything, but nothing
>seemed to work...
>As I'm using the GLEventListener way, I thought this
>is the reason, maybe a bug when removing the listener.
>But as I tried the subclassing way, I saw that it was
>the same... 
>Even if everything is properly closed (canvas stopped,
>listener removed, etc.), it occurs when I call
>cvsDispose... So, what happens ?
>
>And a little question : is the developpment of GL4Java
>stopped ? Or is Sven Goettel still working on it, and
>making a JFC/Swing implementations which works,
>because I don't like to mix Swing (JFrame) and AWT
>(GLCanvas and not GLJpanel) things together.
>
>Florent GEFFROY
>
> --- "Tobias L. George" <tg...@ul...> a
>écrit : > Florent,
>  
>
>>M'excuse, mais ma frances c'est plus mal que ton
>>anglais . . .
>>donc . . . I will be responding in english.  I think
>>that what
>>you may need to do to get rid of your problem is to
>>make
>>certain that you are calling cvsDispose() on the
>>GLCanvas
>>you are trying to get rid of PRIOR to the canvas
>>being
>>removed from the window, or its containing
>>component.
>>
>>After this, you will not have the "gljDestroy failed
>>. . ."
>>message anymore, but I think your app will still
>>slow down
>>after a while.  I am still working on finding this
>>problem.
>>
>>                                         Peace, Love
>>and Hair Grease,
>>
>>                                                   
>>-TOBY
>>
>>Florent Geffroy wrote:
>>
>>    
>>
>>>I have exactly the same problem ! When trying to
>>>destroy a Canvas, it tells me something like
>>>"gljDestroy failed"... 
>>>Actually, glj designate the GLContext, but I
>>>      
>>>
>>founded
>>    
>>
>>>that it is properly closed, so I can't explain why
>>>this error occurs...
>>>
>>>Florent GEFFROY
>>>
>>>--- "Tobias L. George" <tg...@ul...> a
>>>écrit : > Hello all,
>>> 
>>>
>>>      
>>>
>>>>I am wondering whether or not anyone else is
>>>>        
>>>>
>>having
>>    
>>
>>>>trouble
>>>>destroying and creating GLCanvases in a single
>>>>window.  I
>>>>have tried with both the binary release from
>>>>Jausoft, and the
>>>>CVS release that was on sourceforge as of March
>>>>        
>>>>
>>22,
>>    
>>
>>>>2003.
>>>>
>>>>I think that something is not being properly
>>>>disposed of when
>>>>a GLCanvas is destroyed.  I am able to create and
>>>>destroy
>>>>a few GLCanvases but after a while the GLCanvases
>>>>that are
>>>>created slow to a crawl when drawing.
>>>>
>>>>Try as I might, I have only been able
>>>>to find a single bug in GL4Java.  It is in the
>>>>GLCanvas code,
>>>>during the first paint, the canvas adds itself to
>>>>the top level
>>>>window as a listener.  The problem is, that it
>>>>        
>>>>
>>never
>>    
>>
>>>>removed
>>>>itself as a listener and so it would never get
>>>>finalized.  This
>>>>is not even a bug if you look at it from the point
>>>>of view of
>>>>always needing to destroy the top-level window in
>>>>order to
>>>>destroy a GLCanvas, although in practice you end
>>>>        
>>>>
>>up
>>    
>>
>>>>having
>>>>to exit the program.  Be that as it may, I am at a
>>>>loss for the
>>>>moment as to why this slow down is happening when
>>>>        
>>>>
>>I
>>    
>>
>>>>create
>>>>and destroy more than a few GLCanvases.  I am
>>>>looking
>>>>through the GL4Java code again now, and I will
>>>>        
>>>>
>>find
>>    
>>
>>>>out why
>>>>sooner or later by the grace of VisualC, but if
>>>>someone has a
>>>>clue, could you help a brotha out ? ? ?
>>>>
>>>>
>>>>                     Peace, Love, and Hair
>>>>        
>>>>
>>Grease,
>>    
>>
>>>>                                       -TOBY
>>>>
>>>>
>>>>
>>>>
>>>>   
>>>>
>>>>        
>>>>
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