/** 
 * Toy plaything for me to learn JOGL/OpenGL
 */

import java.awt.*;
import java.awt.event.*; 
import javax.swing.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;



public class ToyFinal extends JFrame 
    implements GLEventListener, KeyListener 
{

    ShapeManager shapeManager;
    Animator animator;
    trackball ball = new trackball();
    int aWidth = 400;
    int aHeight = 400;
    JCheckBoxMenuItem wireframe;
    JCheckBoxMenuItem specular;
    JCheckBoxMenuItem smooth;
    JCheckBoxMenuItem backFaceCull;
    JCheckBoxMenuItem zBuffer;
    JCheckBoxMenuItem twoSided;
    JRadioButtonMenuItem[] levelItems;

    public static void main(String[] args){
	ToyFinal t = new ToyFinal();
	//exit if frame's close box is clicked
	t.addWindowListener( new WindowAdapter() {
		public void windowClosed(WindowEvent e){
		    System.exit(0);
		}
		public void windowClosing(WindowEvent e) {
		    windowClosed(e);
		}
	    }
			     );
    }


    int level;


    /* These functions are "callbacks" for events we are
       not interested in
    */

    public void keyTyped(KeyEvent evt){

    }

    public void keyReleased(KeyEvent evt){

    }

    public ToyFinal(){
	super("ToyFinal");
	
	GLCanvas glc = new GLCanvas();

	add("Center", glc);
	glc.setSize(aWidth,aHeight);

	JPopupMenu.setDefaultLightWeightPopupEnabled(false); //so menus appear above GLCanvas

	JMenuBar menubar = new JMenuBar();
	setJMenuBar(menubar);

	shapeManager = new ShapeManager();
	menubar.add(shapeManager.getMenu());

	JMenu options = new JMenu("Options");
	menubar.add(options);
	wireframe = new JCheckBoxMenuItem("Wireframe");
        options.add(wireframe);
	specular = new JCheckBoxMenuItem("Specular Lighting");
        options.add(specular);
	twoSided = new JCheckBoxMenuItem("Two-sided Lighting");
        options.add(twoSided);
	backFaceCull = new JCheckBoxMenuItem("Back-face Cull");
        options.add(backFaceCull);
	zBuffer = new JCheckBoxMenuItem("Use Z Buffer");
        options.add(zBuffer);
        zBuffer.setSelected(true);
	smooth = new JCheckBoxMenuItem("Smooth Shading");
        options.add(smooth);

	JMenu levels = new JMenu("Level");
	ButtonGroup bg = new ButtonGroup();
        levelItems = new JRadioButtonMenuItem[7];
        for (int i = 0; i < levelItems.length; i++){
	    levelItems[i] = new JRadioButtonMenuItem(i+"");
	    levels.add(levelItems[i]);
            bg.add(levelItems[i]);
	    levelItems[i].addActionListener(new ActionListener() {
		    public void actionPerformed(ActionEvent e) {
			level = Integer.parseInt(e.getActionCommand());
		    }
		});
	}
        level = 2;
        levelItems[level].setSelected(true);
	menubar.add(levels);

	ball.listen(glc);
	glc.addGLEventListener(this);
	glc.addKeyListener(this);
	addKeyListener(this);
        animator = new FPSAnimator(glc, 30); //animate at 30 fps
	animator.start();
	pack(); //work out sizes of all Components
	setVisible(true); 
    }

    
    public void init(GLAutoDrawable drawable){
	GL gl = drawable.getGL();
	gl.glClearColor(0.2f, 0.3f, 0.2f, 1.0f);
    }

    public void keyPressed(KeyEvent evt){
	if(evt.getKeyChar() == 'q') {
	    animator.stop();
	    System.exit(0);
	}
	if(evt.getKeyChar() == 's') specular.setSelected(!specular.isSelected()); //toggle
	if(evt.getKeyChar() == 'r') smooth.setSelected(!smooth.isSelected()); //toggle
	if(evt.getKeyChar() == 'l') twoSided.setSelected(!twoSided.isSelected()); //toggle

	if(evt.getKeyChar() == '+' && level < levelItems.length-1) levelItems[++level].setSelected(true);

	if(evt.getKeyChar() == '-' && level > 0) levelItems[--level].setSelected(true);
	
    }

    public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height){
	GL gl = drawable.getGL();
	gl.glViewport(x, y, width, height);
	gl.glMatrixMode(GL.GL_PROJECTION);
	gl.glLoadIdentity();
	gl.glOrtho(-2, 2, -2, 2, -5, 10);
	gl.glMatrixMode(GL.GL_MODELVIEW);
	gl.glLoadIdentity();
	gl.glEnable(GL.GL_AUTO_NORMAL);
	aWidth = width;
	aHeight = height;

    }

    public void display(GLAutoDrawable drawable){
	float[] teapotMat = {0.6f, 0.6f, 0.6f, 1.0f};
	float[] teapotSpec = {0.8f, 0.8f, 0.8f, 1.0f};
	float[] zero = {0.0f, 0.0f, 0.0f, 1.0f};

	GL gl = drawable.getGL();
	gl.glShadeModel(smooth.isSelected() ? GL.GL_SMOOTH : GL.GL_FLAT);
	gl.glLightModeli(GL.GL_LIGHT_MODEL_TWO_SIDE, twoSided.isSelected() ? 1 : 0);

	if (zBuffer.isSelected()) {
	    gl.glEnable(GL.GL_DEPTH_TEST);
	} else {
	    gl.glDisable(GL.GL_DEPTH_TEST);
	}	    
	if (backFaceCull.isSelected()) {
	    gl.glEnable(GL.GL_CULL_FACE);
	} else {
	    gl.glDisable(GL.GL_CULL_FACE);
	}	    

	gl.glClear(GL.GL_DEPTH_BUFFER_BIT|GL.GL_COLOR_BUFFER_BIT);
	// gl.glColor3f(1.0f, 1.0f, 1.0f);	
	float[] lightpos = {0.0f, 0.0f, 1.0f, 0.0f};
	gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, lightpos, 0);
	gl.glEnable(GL.GL_LIGHTING);
	gl.glEnable(GL.GL_LIGHT0);
	gl.glEnable(GL.GL_NORMALIZE); //scale normals to have length 1

	gl.glPushMatrix();
	gl.glTranslatef(0.0f, 0.0f, -5.0f);
	gl.glMultMatrixf(ball.getRotMatrix(), 0);
	gl.glMaterialfv(GL.GL_FRONT_AND_BACK, GL.GL_AMBIENT_AND_DIFFUSE, teapotMat, 0);
	if(specular.isSelected()){
	    gl.glMaterialfv(GL.GL_FRONT, GL.GL_SPECULAR, teapotSpec, 0);
	    gl.glMateriali(GL.GL_FRONT, GL.GL_SHININESS, 80);
	}
	else {
	    gl.glMaterialfv(GL.GL_FRONT, GL.GL_SPECULAR, zero, 0);
	    gl.glMateriali(GL.GL_FRONT, GL.GL_SHININESS, 0);
	}
	if (wireframe.isSelected()) {
	    gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_LINE);
	} else {
	    gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL);
	}	    

        shapeManager.display(gl,level,wireframe.isSelected());

	gl.glPopMatrix();
    }
    

    /** This method handles things if display depth changes */
    public void displayChanged(GLAutoDrawable drawable,
			       boolean modeChanged,
			       boolean deviceChanged){
    }
}