crwood please come(every one can come too)

don't know how to use Event class to handle a event.Do you have any exsample?

Okay. Here are some ideas demonstrated in the app below. And some pointers to resources.

To learn more about events and handling events see [url=http://java.sun.com/docs/books/tutorial/uiswing/events/index.html]Lesson: Writing Event Listeners[/url].

The [url=http://java.sun.com/docs/books/tutorial/index.html]Java Tutorial[/url] has a lot of information and code examples on many different areas.

The section on making guis is here: [url=http://java.sun.com/docs/books/tutorial/uiswing/index.html]Trail: Creating a GUI with JFC/Swing[/url].

Other subjects you might enjoy:

1 ?[url=http://java.sun.com/docs/books/tutorial/uiswing/painting/index.html]Lesson: Performing Custom Painting[/url]. Includes more links.

2 ?[url=http://java.sun.com/docs/books/tutorial/uiswing/components/index.html]Lesson: Using Swing Components[/url]

3 ?[url=http://java.sun.com/docs/books/tutorial/uiswing/layout/index.html]Lesson: Laying Out Components Within a Container[/url]

4 ?Animation: [url=http://java.sun.com/docs/books/tutorial/uiswing/concurrency/index.html]Lesson: Concurrency in Swing[/url]. More advanced.

import java.awt.*;

import java.awt.event.*;

import java.awt.geom.Ellipse2D;

import java.awt.image.BufferedImage;

import javax.swing.*;

import javax.swing.event.*;

public class DS2 implements ActionListener {

DSGraphics graphicComponent;

DSController controller;

JPanel centerPanel;

public void actionPerformed(ActionEvent e) {

String ac = e.getActionCommand();

CardLayout cards = (CardLayout)centerPanel.getLayout();

cards.show(centerPanel, ac);

}

private JPanel getCenterPanel() {

graphicComponent = new DSGraphics();

controller = new DSController(graphicComponent);

CardLayout cards = new CardLayout();

centerPanel = new JPanel(cards);

centerPanel.add("Menu", getMenuPanel());

centerPanel.add("Game", graphicComponent);

return centerPanel;

}

private JPanel getMenuPanel() {

// Create components.

String[] gameMenulist = {"New Game","Abouts","how to play","Options","Exit"};

JList menulist= new JList(gameMenulist);

ListSelectionModel menulistModel = menulist.getSelectionModel();

//menulist setting

//menulist.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);

menulist.setLayoutOrientation(JList.HORIZONTAL_WRAP);

menulist.setVisibleRowCount(-1);

menulist.setBackground(Color.BLACK);

menulist.setForeground(Color.WHITE);

menulist.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

menulist.addListSelectionListener(new ListListener());

JPanel panel = new JPanel() {

Image bg = new ImageIcon(//"image/bgimg.jpg");

"images/Bird.gif").getImage();

protected void paintComponent(Graphics g) {

super.paintComponent(g);

g.drawImage(bg, 0, 0, this);

}

};

panel.setBackground(Color.white);

panel.setOpaque(true); // default value

panel.setLayout(new GridBagLayout());

GridBagConstraints a = new GridBagConstraints();

// The anchor constraint requires a non-zero weight

// constraint in the direction it is going, ie,

// weightx for horizontal values such as EAST,

// WEST, LINE_START, LINE_END.

a.weighty = 1.0;

a.anchor = GridBagConstraints.PAGE_END;

panel.add(menulist, a);

return panel;

}

private Box getControls() {

String[] ids = { "Menu", "Game" };

Box box = Box.createHorizontalBox();

box.add(Box.createHorizontalGlue());

for(int j = 0; j < ids.length; j++) {

JButton button = new JButton(ids[j]);

button.setActionCommand(ids[j]);

button.addActionListener(this);

box.add(button);

box.add(Box.createHorizontalGlue());

}

return box;

}

public static void main(String[] args) {

DS2 app = new DS2();

JFrame mainframe = new JFrame();

mainframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

mainframe.getContentPane().add(app.getCenterPanel());

mainframe.getContentPane().add(app.getControls(), "Last");

mainframe.setSize(600, 600);

mainframe.setVisible(true);

}

private class ListListener implements ListSelectionListener {

public void valueChanged(ListSelectionEvent e) {

if(!e.getValueIsAdjusting()) {

JList list = (JList)e.getSource();

int index = list.getSelectedIndex();

switch(index) {

case 0:

controller.newGame();

CardLayout cards = (CardLayout)centerPanel.getLayout();

cards.show(centerPanel, "Game");

break;

case 4:

System.exit(0);

break;

default:

System.out.println("unexpected type: " + index);

}

}

}

}

}

class DSGraphics extends JPanel {

Ellipse2D.Double ball = new Ellipse2D.Double(60,100,40,40);

public void initializeBall() {

double x = 60;

double y = 100;

ball.setFrameFromDiagonal(x, y, x+ball.width, y+ball.height);

repaint();

}

public void moveBall(int dx, int dy) {

double x = ball.x + dx;

double y = ball.y + dy;

ball.setFrameFromDiagonal(x, y, x+ball.width, y+ball.height);

repaint();

}

protected void paintComponent(Graphics g) {

super.paintComponent(g);

Graphics2D g2 = (Graphics2D)g;

g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,

RenderingHints.VALUE_ANTIALIAS_ON);

g2.setPaint(Color.blue);

String s = "Click to start and stop";

float x = (getWidth() - g2.getFontMetrics().stringWidth(s))/2;

g2.drawString(s, x, 25);

g2.setPaint(Color.red);

g2.fill(ball);

}

}

class DSController implements Runnable {

DSGraphics component;

Thread thread;

boolean keepRunning = false;

int dx = 2;

int dy = 3;

final int DELAY = 50;

public DSController(DSGraphics dsg) {

component = dsg;

component.addMouseListener(ml);

}

public void newGame() {

stop();

component.initializeBall();

}

public void run() {

while(keepRunning) {

try {

Thread.sleep(DELAY);

} catch(InterruptedException e) {

System.out.println("interrupted");

stop();

}

advance();

}

}

private void advance() {

checkBoundries();

component.moveBall(dx, dy);

}

private void checkBoundries() {

int w = component.getWidth();

int h = component.getHeight();

Rectangle r = component.ball.getBounds();

if(r.x + dx < 0 || r.x + r.width + dx > w)

dx *= -1;

if(r.y + dy < 0 || r.y + r.height + dy > h)

dy *= -1;

}

public void start() {

if(!keepRunning) {

keepRunning = true;

thread = new Thread(this);

thread.setPriority(Thread.NORM_PRIORITY);

thread.start();

}

}

public void stop() {

keepRunning = false;

if(thread != null)

thread.interrupt(); // wake up

thread = null;

}

private MouseListener ml = new MouseAdapter() {

public void mousePressed(MouseEvent e) {

if(keepRunning)

stop();

else

start();

}

};

}

crwooda at 2007-7-12 9:15:41 >