package examples;

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

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

public class PaintedBuffer extends JPanel {
	BufferedImage buffer;

	public PaintedBuffer(Component original) {
		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);
	}

	@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");
		JButton button = new JButton("CSE132 Rocks!");
		button.setIcon(new ImageIcon("smile.jpg"));
		button.setBounds(10,10,200,100);
		f.setLayout(null);
		f.add(button);

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

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

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