import java.applet.Applet;
import java.awt.Graphics;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;

// must import jgl.GL....
import jgl.GL;
import jgl.GLU;
import jgl.GLAUX;

public class list extends Applet
		  implements ComponentListener {
    // must use GL to use jGL.....
    // and use GLU to use the glu functions....
    // remember to give GL to initialize GLU
    // and use GLAUX to use the aux functions.....
    // remember to give GL to initialize GLAUX
    GL myGL = new GL ();
    GLU myGLU = new GLU (myGL);
    GLAUX myAUX = new GLAUX (myGL);

    private int listName = 1;

    private void myinit () {
	myGL.glNewList (listName, GL.GL_COMPILE);
            myGL.glColor3f (1.0f, 0.0f, 0.0f);
            myGL.glBegin (GL.GL_TRIANGLES);
                myGL.glVertex2f (0.0f, 0.0f);
                myGL.glVertex2f (1.0f, 0.0f);
                myGL.glVertex2f (0.0f, 1.0f);
            myGL.glEnd ();
            myGL.glTranslatef (1.5f, 0.0f, 0.0f);
        myGL.glEndList ();
        myGL.glShadeModel (GL.GL_FLAT);
    }

    private void drawLine () {
    	myGL.glBegin (GL.GL_LINES);
	    myGL.glVertex2f ( 0.0f, 0.5f);
	    myGL.glVertex2f (15.0f, 0.5f);
	myGL.glEnd ();
    }

    private void display () {
    	int i;

	myGL.glClear (GL.GL_COLOR_BUFFER_BIT);
	myGL.glColor3f (1.0f, 0.0f, 0.0f);
	for (i = 0; i < 10; i++) {
	    myGL.glCallList (listName);
	}
	drawLine ();
	myGL.glFlush ();
    }

    public void componentMoved (ComponentEvent e) {}
    public void componentShown (ComponentEvent e) {}
    public void componentHidden (ComponentEvent e) {}

    public void componentResized (ComponentEvent e) {
        // get window width and height by myself
	myReshape (getSize ().width, getSize ().height);
        display ();
	repaint ();
    }

    private void myReshape (int w, int h) {
	myGL.glViewport (0, 0, w, h);
	myGL.glMatrixMode (GL.GL_PROJECTION);
	myGL.glLoadIdentity ();
	if (w <= h) {
	    myGLU.gluOrtho2D (0.0, 2.0, -0.5 * (float)h/(float)w, 1.5 * (float)h/(float)w);
	} else {
	    myGLU.gluOrtho2D (0.0, 2.0 * (float)w/(float)h, -0.5, 1.5);
	}
	myGL.glMatrixMode (GL.GL_MODELVIEW);
	myGL.glLoadIdentity ();
    }

    public void update (Graphics g) {
        // skip the clear screen command....
        paint (g);
    }
	
    public void paint (Graphics g) {
	myGL.glXSwapBuffers (g, this);
    }

    public void init () {
	myAUX.auxInitPosition (0, 0, 400, 50);
	myAUX.auxInitWindow (this);
	myinit ();

	// as call auxReshapeFunc()
        addComponentListener (this);
	myReshape (getSize ().width, getSize ().height);

        // call display as call auxMainLoop(display);
        display ();
    }

}