RE: [gl4java-usergroup] how to make GLAnimCanvas release all reso urces?

[Combe, C. <C....@na...>]

thanks max - but unfortunately i still have the same problem. I should =
have
said before that the destroy method in the classes that inherit from
GLAnimCanvas call cvsDispose, sorry for this ommission. I changed the =
code
so that cvsDispose is called before I remove the canvas from the =
JPanel, but
it didn't help. I've also tried destroying the GLContext myself rather =
than
via cvsDispose but no luck there. The action performed method for the =
change
view button is now as follows (i think my desperation is apparent in =
the way
the switch statement has been written :-)=20

    void changeView_actionPerformed(ActionEvent e)
    {
        land.running =3D false;
        while (land.isAlive())
        {
            System.out.println("waiting");
            try {Thread.sleep(150);}
            catch (InterruptedException ex)
{System.err.println(ex.toString());}
        }
        land =3D null;
        switch (canvasType)
        {
            case 1: displayPanel.remove((Canvas2D) canvas);
                    canvasType =3D 2;
                    canvas =3D new Shaded3D (800, 600);
                    displayPanel.add((Shaded3D) canvas);
                    break;
            case 2: ((Shaded3D)canvas).stop();
                    ((Shaded3D)canvas).getGLContext().gljFree();
                    ((Shaded3D)canvas).getGLContext().gljDestroy();
                    ((Shaded3D) canvas).cvsDispose();
                    ((Shaded3D)canvas).setVisible(false);
                    ((Shaded3D)canvas).setEnabled(false);
                    displayPanel.remove((Shaded3D) canvas);
                    canvas =3D null;
                    canvasType =3D 3;
                    canvas =3D new Coloured3D (800, 600);
                    displayPanel.add((Coloured3D) canvas);
                    break;
            case 3: ((Coloured3D) canvas).stop();
                    ((Coloured3D)canvas).getGLContext().gljFree();
                    ((Coloured3D)canvas).getGLContext().gljDestroy();
                    ((Coloured3D) canvas).cvsDispose();
                    ((Coloured3D)canvas).setVisible(false);
                    ((Coloured3D)canvas).setEnabled(false);
                    displayPanel.remove((Coloured3D) canvas);
                    canvas =3D null;
                    canvasType =3D 1;
                    canvas =3D new Canvas2D ();
                    displayPanel.add((Canvas2D) canvas);
                    break;
        }
        land =3D new NormLand(canvas);
        canvas.setLand(land);
	  land.running =3D true;
        land.start();
    }

'land' is the thread that the model runs in, i know its not the this =
thread
that i'm not recovering resources from as the button that stops and =
restarts
the model works fine. Also, after chnaging the view a few times, the =
program
still runs at the normal speed when seen in the 2D display, its only =
the
GLCanvas's that are slowed down. I'm using java version 1.3.1_02.=20

cheers,
colin

-----Original Message-----
From: Max Gilead [mailto:gi...@li...]
Sent: 02 June 2002 19:31
To: gl4...@li...
Subject: Re: [gl4java-usergroup] how to make GLAnimCanvas release all
resources?


Combe, Colin wrote:

>any suggestions about what i'm doing wrong?
> =20
>
Most probably it's missing cvsDispose call (from GLCanvas Javadoc):

"IF you remove/release a GLCanvas, e.g. you want to close/dispose =
it=B4s=20
Window (which contains this GLCanvas), you HAVE TO call:

cvsDispose <cid:par...@li...>
=20

You should call this before releasing/dispose this Window ! Also you =
can=20
overwrite this class, to dispose your own elements, e.g. a Frame etc. - =

but be shure that you call cvsDispose implementation call this one !"

HTH,
Max