import sunw.demo.buttons.OurButton;
import java.beans.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import utilities.*;

public class PropertyChangeDemo extends Frame
                             implements PropertyChangeListener {

protected OurButton aButtonBean;

public static void main (String[] args) {
	new PropertyChangeDemo();
}
//-------------------------------------------------------------------
// Constructor: create window with single bean button
//-------------------------------------------------------------------
public PropertyChangeDemo() {

	super("Just sit back and watch..");
	setLayout(new FlowLayout());

	// instantiate a test bean (never with "new" !!)
	try {
		aButtonBean = (sunw.demo.buttons.OurButton)	Beans.instantiate(
									null, "sunw.demo.buttons.OurButton");

	} catch (ClassNotFoundException noSuchBean) {
		System.out.println("OurButton bean not found: "+ noSuchBean);
		System.exit(10);
	} catch (IOException beanIOerror) {
		System.out.println("I/O error while loading bean: " + beanIOerror);
		System.exit(10);
	}

	// unlike normal Buttons, we cant give an OurButton an initial label,
	// so set the label now.
	aButtonBean.setLabel("When my properties change...");

	add(aButtonBean);

	// register us as interested in button property changes
	aButtonBean.addPropertyChangeListener(this);

	// pop open window with button
	setSize(new Dimension(300,75));
	setVisible(true);

	// wait a bit, then modify one of the button's properties
	System.out.println("No need to push that button.. I'll do that.");
	MiscKit.delay(6*1000);

	aButtonBean.setLabel("anyone can know about it !");

	MiscKit.delay(12*1000);

	// close window, quit
	setVisible(false);
	System.exit(0);
}
//-------------------------------------------------------------------
// propertyChange() is the method we have to implement from interface
// PropertyChangeListener. This is where we hear of OurButton properties
// changing.
//-------------------------------------------------------------------
public void propertyChange(PropertyChangeEvent pcEvent) {
String changedProperty;
Object oldPropertyValue, newPropertyValue;

	changedProperty		= pcEvent.getPropertyName();
	oldPropertyValue	= pcEvent.getOldValue();
	newPropertyValue	= pcEvent.getNewValue();

	System.out.println("OurButton property '"+ changedProperty  +"'");
	System.out.println(".. changed from    '"+ oldPropertyValue +"'");
	System.out.println(".. to              '"+ newPropertyValue +"'");
}
} // End of Class PropertyChangeDemo