package leaf.ui;

import java.awt.AWTException;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;

import javax.swing.JPanel;

public class LeafTransparentPanel extends JPanel
{
	private static final long serialVersionUID = 1L;
	
	private BufferedImage background = null;
	
	public LeafTransparentPanel()
	{
		updateBackground();
	}

	
	private void updateBackground()
	{
		try
		{
			Robot rbt = new Robot();
			Toolkit tk = Toolkit.getDefaultToolkit();
			Dimension dim = tk.getScreenSize();
			background = rbt.createScreenCapture( new Rectangle( 0, 0, (int) dim.getWidth(), (int) dim.getHeight() ) );
		} catch( AWTException ex )
		{
			ex.printStackTrace();
		}
	}

	@Override
	public void paintComponent( Graphics g )
	{
		Point pos = this.getLocationOnScreen();
		Point offset = new Point( -pos.x, -pos.y );
		g.drawImage( background, offset.x, offset.y, null );
	}
}