All Packages  Class Hierarchy  This Package  Previous  Next  Index

Class sunw.demo.misc.ChangeReporter

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.TextComponent
                   |
                   +----java.awt.TextField
                           |
                           +----sunw.demo.misc.ChangeReporter

public class ChangeReporter
extends TextField
implements Serializable

A simple extension of TextField that handles PropertyChangeEvents. This Bean handles PropertyChange events by displaying the name of the property and the new property value. A Java Bean that displays bound properties can be connected to a ChangeReporter with the BeanBox. To do so programatically is straightforward:

 import sunw.demo.misc.OurButton;
 import sunw.demo.misc.ChangeReporter;
 import java.awt.*;
 import java.beans.*;
 public class DemoChangeReporter
 {
   OurButton button = new OurButton(); 
   ChangeReporter reporter = new ChangeReporter();
   PropertyChangeAdapter adapter = new PropertyChangeAdapter();
   DemoChangeReporter()
   {
     button.addPropertyChangeListener(adapter);
     button.setLabel("Report This");
     Frame f = new Frame("Demo Change Reporter");
     f.setLayout(new FlowLayout());
     f.add(button);
     f.add(reporter);
     f.pack();
     f.show();
   }
   class PropertyChangeAdapter implements PropertyChangeListener 
   {
     public void propertyChange(PropertyChangeEvent e)
     {
       reporter.reportChange(e);
     }
   }
   public static void main(String[] argv)
   {
     new DemoChangeReporter();
   }
 }

In the example above, the button is connected to the ChangeReporter with a (nested) adpater class. When the DemoChangeReporter object is constructed the buttons label field is set, and the adapters propertyChange method runs.

ChangeReporter()

reportChange(PropertyChangeEvent)

ChangeReporter

 public ChangeReporter()

reportChange

 public void reportChange(PropertyChangeEvent evt)

All Packages  Class Hierarchy  This Package  Previous  Next  Index