CustomComponentTest.java

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/**
 * Tests the custom component classes MirrorText and StopWatchLabel
 * by adding them both to a panel.  The panel also contains a button
 * that changes the text on the MirrorText component (and also on
 * the button itself.  This program also demonstrates how the layout
 * of the panel is recomputed when the components are changed.  
 */
public class CustomComponentTest extends JPanel {

	/**
	 * The main routine simply opens a window that shows a CustomComponentTest panel.
	 */
	public static void main(String[] args) {
		JFrame window = new JFrame("CustomComponentText");
		CustomComponentTest content = new CustomComponentTest();
		window.setContentPane(content);
		window.setSize(420,150);
		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
		window.setLocation( (screenSize.width - window.getWidth())/2,
				(screenSize.height - window.getHeight())/2 );
		window.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
		window.setVisible(true);
	}


	private MirrorText greet;
	private StopWatchLabel timer;
	private JButton changeText;

	public CustomComponentTest() {

		setLayout(new FlowLayout());

		greet = new MirrorText("PLEASE LET ME OUT!");
		greet.setBackground(Color.black);
		greet.setForeground(Color.red);
		greet.setFont( new Font("SansSerif", Font.BOLD, 30) );
		add(greet);

		timer = new StopWatchLabel();
		timer.setBackground(Color.white);
		timer.setForeground(Color.blue);
		timer.setOpaque(true);
		timer.setFont(new Font("Serif", Font.PLAIN, 20));
		add( timer );

		changeText = new JButton("Change Text in this Program");
		add(changeText);

		changeText.addActionListener( new ActionListener() {
			public void actionPerformed(ActionEvent evt) {
				if (greet.getText().equals("PLEASE LET ME OUT!"))
					greet.setText("Help!");
				else
					greet.setText("PLEASE LET ME OUT!");
				if (timer.isRunning() == false)
					timer.setText("Please click me.");
				if (changeText.getText().equals("Change Back"))
					changeText.setText("Change Text in this Program");
				else
					changeText.setText("Change Back");
			}
		} );

	} 

}