import javax.swing.*;

import java.awt.*;

import java.awt.geom.*;

import java.awt.event.*;

/**

* Main class for game. Does window stuff and display

*/

class MyFrame extends JFrame{

public MyFrame(){

setTitle("WidgetTest");

setSize(200,200); // size in pixels

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

}

class MyPanel extends JPanel{

// Color and string are now instance vars so we can change them

Color current = Color.red;

String msg = "Hello World";

// button variables now instace vars.

// May as well init here.

JButton toggle = new JButton("Toggle");

JButton green = new JButton("Green");

JTextField text = new JTextField(10);

// Button listener. Now an inner class so we

// can access mypanel data.

class ButtonHandler implements ActionListener{

public void actionPerformed(ActionEvent e){

// check source, if green button, set color

if(e.getSource() == green){

current = Color.green;

}

else if(e.getSource() == text){

String s = text.getText();

if(s != null) msg = s; // install as new msg

repaint();

}

else{ // do toggle stuff

if(current.equals(Color.red))

current = Color.blue;

else

current = Color.red;

}

repaint();

}

}

MyPanel(){

// make one instance of listener and add to all

ButtonHandler b = new ButtonHandler();

toggle.addActionListener(b);

green.addActionListener(b);

text.addActionListener(b);

// add buttons (and text field)

add(toggle);

add(green);

add(text);

}

public void paintComponent(Graphics g){

super.paintComponent(g);

// System.out.println("paintComponent");

g.setColor(current);

g.drawString(msg,50,100);

}

}

public class WidgetTest{

// OK let's have our main() create a frame.

public static void main(String[] args){

MyFrame myframe = new MyFrame();

MyPanel mypanel = new MyPanel();

// Random stuff we just have to do (the book explains, kind of)

Container contentPane = myframe.getContentPane();

// add panel

contentPane.add(mypanel);

myframe.show();

}

}

/*

*/