public synchronized void paint(Graphics g) {
	Graphics2D g2 = (Graphics2D) g;
	int w = getWidth();
	int h = getHeight();
	...
	// Draw Background.
	g2.setBackground(getBackground());
	g2.clearRect(0, 0, w, h);
	g2.setTransform(_worldToView.getTransform());

	// Draw Map.
	switchFromWorldScaleToMapScale(g2);
	g2.drawImage(backgroundImg, 0, 0, null);
	switchFromMapScaleToWorldScale(g2);

	synchronized (_depthOrdering) {	
		for (Iterator it = _depthOrdering.iterator(); it.hasNext();) {
			MapObject mo = (MapObject)it.next();
			mo.paint(g2);
		}
	}
	...
}