package bugs;

import java.awt.Font;
import java.awt.Frame;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCanvas;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.glu.GLU;

import com.sun.opengl.util.j2d.TextRenderer;

/**
 * shows a window containing the string "ARGH".
 * press space to toggle a redraw.
 * sometimes, the third letter will be distorted
 *  
 * 
 */
public class TextDistortion implements GLEventListener, KeyListener {

  GLAutoDrawable drawable;
  TextRenderer tr;
  static GLCanvas canvas;


  public TextDistortion(GLAutoDrawable drawable) {
    this.drawable = drawable;
    drawable.addGLEventListener(this);
  }


  /**
   * {@inheritDoc}
   * @see javax.media.opengl.GLEventListener#display(javax.media.opengl.GLAutoDrawable)
   */
  public void display(GLAutoDrawable arg0) {
    System.out.println("display");
    GL gl = arg0.getGL();
    gl.glClear(GL.GL_COLOR_BUFFER_BIT);

    tr.beginRendering(arg0.getWidth(), arg0.getHeight());
    tr.setColor(0.0f, 1, 0, 1f);
    tr.draw("ARGH", arg0.getWidth() / 2 - 2, arg0.getHeight() - 28);
    tr.endRendering();

    gl.glFlush();
  }


  /**
   * {@inheritDoc}
   * @see javax.media.opengl.GLEventListener#displayChanged(javax.media.opengl.GLAutoDrawable,
   *      boolean, boolean)
   */
  public void displayChanged(GLAutoDrawable arg0, boolean arg1, boolean arg2) {
  }


  /**
   * {@inheritDoc}
   * @see javax.media.opengl.GLEventListener#init(javax.media.opengl.GLAutoDrawable)
   */
  public void init(GLAutoDrawable arg0) {
    tr = new TextRenderer(new Font("Verdana", Font.PLAIN, 26));

  }


  /**
   * {@inheritDoc}
   * @see javax.media.opengl.GLEventListener#reshape(javax.media.opengl.GLAutoDrawable, int, int,
   *      int, int)
   */
  public void reshape(GLAutoDrawable arg0, int arg1, int arg2, int width, int height) {
    GL gl = arg0.getGL();
    GLU glu = new GLU();

    final float h = (float) width / (float) height;
    gl.glViewport(0, 0, width, height);
    gl.glMatrixMode(GL.GL_PROJECTION);
    gl.glLoadIdentity();
    glu.gluPerspective(45.0f, h, 0.1, 20.0);

    gl.glMatrixMode(GL.GL_MODELVIEW);
    gl.glLoadIdentity();

  }


  /**
   * @param args
   */
  public static void main(String[] args) {

    try {

      System.loadLibrary("jogl");
      System.out.println("Hello World! (The native libraries are installed.)");
      GLCapabilities caps = new GLCapabilities();

      canvas = new GLCanvas(caps, null, null, null);

      TextDistortion td = new TextDistortion(canvas);
      canvas.addKeyListener(td);

      final Frame frame = new Frame();

      frame.setBounds(100, 100, 600, 600);
      frame.add(canvas);
      frame.setVisible(true);
      canvas.requestFocus();
      canvas.requestFocusInWindow();

      frame.addWindowListener(new WindowAdapter() {

        public void windowClosing(WindowEvent e) {
          System.out.println("eek");
          frame.setVisible(false);
          System.exit(0);

        }

      });
      System.out.println("Hello JOGL! (The jar appears to be available.)" + caps);
    } catch (Exception e) {
      System.out.println(e);
    }
  }


  /**
   * {@inheritDoc}
   * @see java.awt.event.KeyListener#keyPressed(java.awt.event.KeyEvent)
   */
  @Override
  public void keyPressed(KeyEvent e) {
    if (e.getKeyChar() == ' ') {
      drawable.display();
    }
  }


  /**
   * {@inheritDoc}
   * @see java.awt.event.KeyListener#keyReleased(java.awt.event.KeyEvent)
   */
  @Override
  public void keyReleased(KeyEvent e) {
  }


  /**
   * {@inheritDoc}
   * @see java.awt.event.KeyListener#keyTyped(java.awt.event.KeyEvent)
   */
  @Override
  public void keyTyped(KeyEvent e) {
  }

}