explicitbuttoncustomizer.java

电子工业出版社出版的《java2应用开发指南》配套光盘源代码

package sunw.demo.buttons;

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

public class ExplicitButtonCustomizer extends Panel implements Customizer, KeyListener {

    public ExplicitButtonCustomizer() {
	setLayout(null);
    }

    public void setObject(Object obj) {
		target = (ExplicitButton) obj;
	
		Label t1 = new Label("Caption:", Label.RIGHT);
		add(t1);
		t1.setBounds(10, 5, 60, 30);
	
		labelField = new TextField(target.getLabel(), 20);
		add(labelField);
		labelField.setBounds(80, 5, 100, 30);
	
		labelField.addKeyListener(this);
	 }

    public Dimension getPreferredSize() {
		return new Dimension(200, 40);
    }

    /**
     * @deprecated provided for backward compatibility with old layout managers.
     */
    public Dimension preferredSize() {
		return getPreferredSize();
    }

    public void keyTyped(KeyEvent e) {
    }

    public void keyPressed(KeyEvent e) {
    }

    public void keyReleased(KeyEvent e) {
		String txt = labelField.getText();
		target.setLabel(txt);
		support.firePropertyChange("", null, null);
    }

    //----------------------------------------------------------------------

    public void addPropertyChangeListener(PropertyChangeListener l) {
		support.addPropertyChangeListener(l);
    }

    public void removePropertyChangeListener(PropertyChangeListener l) {
		support.removePropertyChangeListener(l);
    }

    private PropertyChangeSupport support = new PropertyChangeSupport(this);

    //----------------------------------------------------------------------

    private ExplicitButton target;
    private TextField labelField;
}