awtcontrolpanel.java

用java3d做的一个粒子系统可以控制粒子运动

import java.awt.*;
import java.awt.event.*;

/*
   Hello. I'm not using Swing because of the interopability
   problems with Java3D.

 */


final class AWTControlPanel extends Panel {

    protected final Particles particles;

    public AWTControlPanel(Particles aparticles){

	this.particles = aparticles;

	CheckboxGroup cg = new CheckboxGroup();

	Panel modePanel = new Panel();

	Checkbox dots = new Checkbox("Points",cg,true);
	dots.addItemListener(new ItemListener(){
	    public void itemStateChanged(ItemEvent e){
		if(e.getStateChange()==ItemEvent.SELECTED)
		    particles.setRenderMode(Particles.MODE_DOTS);
	    }});

	modePanel.add(dots);
	
	Checkbox lines = new Checkbox("Lines",cg,false);
	lines.addItemListener(new ItemListener(){
	    public void itemStateChanged(ItemEvent e){
		if(e.getStateChange()==ItemEvent.SELECTED)
		    particles.setRenderMode(Particles.MODE_LINES);
	    }});
	
	modePanel.add(lines);
	add(modePanel);

	Button fewerp = new Button("Fewer");
	fewerp.addActionListener(new ActionListener(){
	    public void actionPerformed(ActionEvent e){
		particles.decreasePoints();
	    }});

	Button morep = new Button("More");
	morep.addActionListener(new ActionListener(){
	    public void actionPerformed(ActionEvent e){
		particles.increasePoints();
	    }});

	Panel amountPanel = new Panel();

	amountPanel.add(fewerp);
	amountPanel.add(morep);
	add(amountPanel);


	Panel speedPanel = new Panel();

	Button pause = new Button("Stop");
	pause.addActionListener(new ActionListener(){
	    public void actionPerformed(ActionEvent e){
		particles.pause();
	    }});

	Button slower = new Button("Slower");
	slower.addActionListener(new ActionListener(){
	    public void actionPerformed(ActionEvent e){
		particles.slower();
	    }});

	Button faster = new Button("Faster");
	faster.addActionListener(new ActionListener(){
	    public void actionPerformed(ActionEvent e){
		particles.faster();
	    }});

	speedPanel.add(pause);
	speedPanel.add(slower);
	speedPanel.add(faster);
	add(speedPanel);

	Panel panel = new Panel();

	Button backward = new Button("Backward");
	backward.addActionListener(new ActionListener(){
	    public void actionPerformed(ActionEvent e){
		particles.backward();
	    }});

	Button forward = new Button("Forward");
	forward.addActionListener(new ActionListener(){
	    public void actionPerformed(ActionEvent e){
		particles.forward();
	    }});

	panel.add(backward);
	panel.add(forward);
	add(panel);

	Panel pointSizePanel = new Panel();
	pointSizePanel.add(new Label("Point Size"));

	Choice pointSize = new Choice();
	for(int i=1;i<=8;i++){
	    pointSize.add(""+i);
	}
	pointSize.select("3");
	pointSize.addItemListener(new ItemListener(){
	    public void itemStateChanged(ItemEvent e){
		if(e.getStateChange()==ItemEvent.SELECTED) {
		    System.out.println(e.getItem());
		    particles.setPointSize(Integer.parseInt((String)e.getItem()));
		}
		
	    }});
	pointSizePanel.add(pointSize);
	add(pointSizePanel);


	Button quit = new Button("Quit");
	quit.addActionListener(new ActionListener(){
	    public void actionPerformed(ActionEvent e){
		System.exit(0);
	    }});
	add(quit); 

	setLayout(new GridLayout(getComponentCount(),1));

    }

}