auxiliarybuttonui.java

《Java2图形设计卷II：Swing》配套光盘源码

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

public class AuxiliaryButtonUI extends ComponentUI {
	private static ComponentUI cui = new AuxiliaryButtonUI();
	private static AuxiliaryButtonMouseListener ml = 
					new AuxiliaryButtonMouseListener();

	// must be implemented
	public static ComponentUI createUI(JComponent c) {
		return cui;
	}
	public void installUI(JComponent c) {
		c.addMouseListener(ml);
	}
	public void uninstallUI(JComponent c) {
		c.removeMouseListener(ml);
	}
	public void update(Graphics g, JComponent c) {
		// don't want ComponentUI default behavior, which is
		// to clear the background
	}
}
class AuxiliaryButtonMouseListener extends MouseAdapter {
	public void mouseEntered(MouseEvent e) {
		JComponent c = (JComponent)e.getSource();
		AccessibleContext ac = c.getAccessibleContext();
		String role = ac.getAccessibleRole().toString();
		String name = ac.getAccessibleName();

		System.out.println("mouse entered component of type " +
							role + " named " + name);
	}
}