[gl4java-usergroup] Newbie GLJPanel and GLAnimJPanel

[Frank A N. <tn...@ju...>]

To All,
        I am just trying to how the GLJPanel and GLAnimJPanel works.  I
(like other posts, with no clear answer) am getting 
GLJPanel: problem in use() method message went executing a GL4Java
program using a GLJPanel.  Here is the complete source code.  All I did
is try to take Lesson 1 of the NeHe GL port lesson
(http://dev.knowledgeassociates.com/hodglim/nehe/nehe.shtml) and use a
GLJAnimJPanel with it.  I also tried it with a GLJPanel with the same
result.

Any help would be greatly appreciated.  

Thanks

Tony

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

import gl4java.GLContext;
import gl4java.awt.GLAnimCanvas;
import gl4java.swing.*;


public class Lesson1 extends Applet
{
    renderCanvas canvas = null;


 /**
     * void init()
     *
     * Initialise the applet.
     */
 public void init()
 {
        setLayout(new BorderLayout());

        canvas = new renderCanvas();
        add("Center", canvas);
 }


 /**
     * void start()
     *
     * Start the applet.
     */
 public void start()
    {
        canvas.start();
    }


 /**
     * void stop()
     *
     * Stop the applet.
     */
    public void stop()
    {
        canvas.stop();
    }


    /**
     * void destroy()
     *
     * Destroy the applet.
     */
    public void destroy()
    {
        canvas.stop();
        canvas.destroy();
    }



    private class renderCanvas extends GLAnimJPanel implements
KeyListener
    {
        /**
         * renderCanvas(int w, int h)
         *
         * Constructor.
         */
        public renderCanvas()
        {
            // super(w, h);
            super();

         addKeyListener(this);
        }


        /**
         * void preInit()
         *
         * Called just BEFORE the GL-Context is created.
         */
        public void preInit()
        {
            stereoView = false;
        }


        /**
         * void init()
         *
         * Called just AFTER the GL-Context is created.
         */
        public void init()
        {
           gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

           gl.glClearDepth(1.0);
           gl.glDepthFunc(GL_LESS);
           gl.glEnable(GL_DEPTH_TEST);

           gl.glShadeModel(GL_SMOOTH);
           gl.glMatrixMode(GL_PROJECTION);
           gl.glLoadIdentity();
           glu.gluPerspective(45.0f, (float)getSize().width /
(float)getSize().height, 0.1f, 100.0f);
          gl.glMatrixMode(GL_MODELVIEW);
        }


        /**
         * void destroy()
         *
         * Destroy the canvas.
         */
        public void destroy()
        {
           cvsDispose();
        }


  /**
   * void reshape(int width, int height)
   *
   * Called after the first paint command.
   */
        public void reshape(int width, int height)
        {
           gl.glViewport(0, 0, width, height);

           gl.glMatrixMode(GL_PROJECTION);
           gl.glLoadIdentity();
           glu.gluPerspective(45.0f, (float)getSize().width /
(float)getSize().height, 0.1f, 100.0f);
           gl.glMatrixMode(GL_MODELVIEW);
        }


        /**
         * void display()
         *
         * Draw to the canvas.
         */
        public void display()
        {
            if (glj.gljMakeCurrent() == false)
             return;

   gl.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
   gl.glLoadIdentity();

            glj.gljSwap();
        }


        /**
       * void keyTyped(KeyEvent e)
       *
       * Invoked when a key has been typed. This event occurs when a key
press is followed by a key release.
       */
     public void keyTyped(KeyEvent e)
  {
  }


   /**
     * void keyPressed(KeyEvent e)
     *
     * Invoked when a key has been pressed.
     */
   public void keyPressed(KeyEvent e)
  {
  }


  /**
    * void keyReleased(KeyEvent e)
    *
   * Invoked when a key has been released.
    */
  public void keyReleased(KeyEvent e)
  {
  }
    }
  private class WindowL extends WindowAdapter {
    public void windowClosing(WindowEvent we) {
      destroy();
      System.exit(0);
    }
  }
  public static void main(String[] args) {
    JFrame f = new JFrame("GL4Java Test");
    Lesson1 l = new Lesson1();
    f.getContentPane().add(l);
    f.addWindowListener(l.new WindowL());
    l.init();
    l.start();
    // f.add(l);
    f.setSize(400, 400);
    f.setVisible(true);

  }
} 
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