Change to fullsreen and adjust DisplayMode

Example Code using the Fullscreen.java class :

public class JOGLframe extends Frame
  implements GLEventListener
{

  Fullscreen fullscreen = new Fullscreen();

  public JOGLframe()
    {
      super("JOGL in an AWT Frame");

      // Use all scrren for this frame
      // in case fullscreen does not work.
      width = fullscreen.getWidth();
      height = fullscreen.getHeight();
      setSize( width, height );
      fullscreen.init( this );
      setFocusable(true);

      setLayout(new BorderLayout());

      addWindowListener(new WindowAdapter() {
	  public void windowClosing(WindowEvent e) {
	    animator.stop();
	    fullscreen.exit();
	    System.exit( 0 );
	  } });

      initJOGL();

      setVisible(true);
      requestFocus();
    }

    ....
}


class Fullscreen 
{
  //////////////// Variables /////////////////////////

  boolean fullscreen = false;
  boolean displayChanged = false;

  GraphicsEnvironment ge=null;
  GraphicsDevice gd=null;
  GraphicsDevice myDevice;
  public DisplayMode dm, dm_old;

  ///////////////// Functions /////////////////////////

  public Fullscreen() 
      {
	ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
	gd = ge.getDefaultScreenDevice();
  
	// Save old displaymode and get new one to play with.
	dm_old = gd.getDisplayMode();
	dm = dm_old;
      }

  public boolean init( Frame frame )
    {
      frame.setUndecorated( true );
      if( gd.isFullScreenSupported() )
      {
	System.out.println("Fullscreen...");//ddd
	try {
	      gd.setFullScreenWindow( frame );
	      fullscreen = true; 
	    } catch( Exception e ) {
	      gd.setFullScreenWindow( null );
	      fullscreen = false; 
	    }
	// Once an application is in full-screen exclusive mode, 
	// it may be able to take advantage of actively setting the display mode.
	if( fullscreen &&
	    gd.isDisplayChangeSupported() ) 
	{
	  // Change displaymode here [..]
	  try {
	    myDevice.setDisplayMode( dm );
	    displayChanged = true;
	  } catch( Exception e ) {
	    myDevice.setDisplayMode( dm_old );
	    displayChanged = false;
	  }
	}
      }
      return fullscreen;
    }

  public void exit()
    {
      if (fullscreen) {
	GraphicsEnvironment ge=null;
	GraphicsDevice gd=null;
	ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
	gd = ge.getDefaultScreenDevice();
	if( gd.isFullScreenSupported() )
	{
	  gd.setFullScreenWindow(null);
	  System.out.println("Exit fullscreen done.");//ddd
	  if( displayChanged ) {
	    myDevice.setDisplayMode( dm_old ); 
	  }
	  fullscreen = false; 
	} 
      }
    }

  public int getHeight() 
    { 
      //System.out.println("dm.getHeight:"+dm.getHeight());//ddd
      return dm.getHeight(); 
    }
  
  public int getWidth() 
    { 
      //System.out.println("dm.getWidth:"+dm.getWidth());//ddd
      return dm.getWidth(); 
    }
}