package examples;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.beans.*;
import javax.swing.*;

/**
 * A painted copy of a component.
 * @author kjg
 *
 */

public class ListeningPaintedBuffer extends JPanel
		implements PropertyChangeListener {
	JComponent original;
	BufferedImage buffer;

	public ListeningPaintedBuffer(JComponent original) {
		this.original = original;
		update();
		original.addPropertyChangeListener(this);
	}

	public void propertyChange(PropertyChangeEvent pce) {
		System.out.println("Got property change " + pce.getPropertyName() +
				". Old value: " + pce.getOldValue() +
				"New value: " + pce.getNewValue());
		update();	
	}	
	
	void update() {
		buffer = new BufferedImage(original.getWidth(), original.getHeight(), BufferedImage.TYPE_INT_ARGB);
		Graphics2D bufferedGraphics = (Graphics2D) buffer.getGraphics();
		bufferedGraphics.setColor(Color.WHITE);
		bufferedGraphics.fillRect(0,0,original.getWidth(), original.getHeight());
		original.paint(bufferedGraphics);		
		repaint();
	}

	@Override
	protected void paintComponent(Graphics g) {
		super.paintComponent(g);
		Graphics2D g2 = (Graphics2D) g;
		g2.scale(((double) getWidth()/buffer.getWidth()), ((double) getHeight())/buffer.getHeight());
		g2.drawImage(buffer, 0, 0, null);
	}

	// Test program:
	public static void main(String[] args) {
		JFrame f = new JFrame("My GUI");
		final JToggleButton button = new JToggleButton("CSE132 Rocks!");
		button.setIcon(new ImageIcon("smile.jpg"));
		button.setBounds(10,10,200,100);
		f.setLayout(null);
		f.add(button);
		
		button.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				button.firePropertyChange("TOGGLED", !button.isSelected(), button.isSelected());
			}
		});

		ListeningPaintedBuffer image = new ListeningPaintedBuffer(button);
		image.setBounds(220,10,200,100);
		f.add(image);

		ListeningPaintedBuffer image2 = new ListeningPaintedBuffer(button);
		image2.setBounds(10,200,100,50);
		f.add(image2);

		f.setSize(500,300);
		f.setVisible(true);
		f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}