/*
 * Created by Nick on Jan 8, 2005
 *
 */
package jmslexamples;

import java.awt.*;
import java.util.*;

import javax.swing.*;

import com.softsynth.jmsl.*;

/**
 * An animation canvas is repainted 10 times a second. Each time, it renders the
 * current position of all its "characters". This is implemented as a MusicJob.
 * 
 * Its characters are moved around by MusicJobs called CharacterScripts, which
 * update the (x, y) positions of the characters in their repeat() methods
 * 
 * Note that the refresh rate of the Animation is constant and runs forever. The
 * character scripts can run at any rate they want to since they don't do any
 * actual drawing (they just update the location data of the characters)
 * 
 * Thanks to Daniel Howe for suggesting this example
 * 
 * @author Nick Didkovsky, (c) 2004 All rights reserved, Email:
 *         didkovn@mail.rockefeller.edu
 *  
 */
public class Animation extends MusicJob {

    // characters are just Points in this example.
    Vector characters = new Vector();
    JPanel canvas;

    public Animation() {
        setRepeats(Integer.MAX_VALUE);
        setRepeatPause(0.1);

        canvas = new JPanel() {
            // every time repaint() is called, render the position of each
            // character
            protected void paintComponent(Graphics g) {
                super.paintComponent(g);
                for (Enumeration e = characters.elements(); e.hasMoreElements();) {
                    Point p = (Point) e.nextElement();
                    g.draw3DRect(p.x, p.y, 10, 10, false);
                }
            }
        };
        canvas.setPreferredSize(new Dimension(200, 200));
    }

    public void addCharacter(Point p) {
        characters.addElement(p);
    }

    public void removeCharacter(Point p) {
        characters.removeElement(p);
    }

    public JPanel getCanvas() {
        return canvas;
    }

    public double repeat(double playTime) {
        canvas.repaint();
        return playTime;
    }

    public static void main(String[] args) {
        JFrame jFrame = new JFrame();
        Animation animation = new Animation();
        jFrame.getContentPane().add(animation.getCanvas());
        jFrame.pack();
        jFrame.setVisible(true);

        final Point character1 = new Point(100, 100);
        final Point character2 = new Point(130, 130);

        animation.addCharacter(character1);
        animation.addCharacter(character2);

        // a script to move character 1 around
        CharacterScript script1 = new CharacterScript(character1);
        script1.setRepeats(Integer.MAX_VALUE);
        script1.setRepeatPause(0.3);

        // a script to move character 2 around (note it's a different repeat
        // pause than character 1)
        CharacterScript script2 = new CharacterScript(character2);
        script2.setRepeats(Integer.MAX_VALUE);
        script2.setRepeatPause(0.15);

        ParallelCollection cartoon = new ParallelCollection();
        cartoon.add(animation);
        cartoon.add(script1);
        cartoon.add(script2);

        cartoon.launch(JMSL.now());
    }
}

class CharacterScript extends MusicJob {

    Point character;

    public CharacterScript(Point character) {
        this.character = character;
    }

    public double repeat(double playTime) {
        int xDelta = JMSLRandom.choose(-2, 3);
        int yDelta = JMSLRandom.choose(-2, 3);
        character.x += xDelta;
        character.y += yDelta;
        return playTime;
    }
}