protected void paintComponent(Graphics g) {
super.paintComponent(g); // paints the background and image
// If currentRect exists, paint a box on top.
if (currentRect != null) {
// Draw a rectangle on top of the image.
g.setXORMode(Color.white); // Color of line varies
// depending on image colors
g.drawRect(rectToDraw.x, rectToDraw.y, rectToDraw.width - 1, rectToDraw.height - 1);
controller.updateLabel(rectToDraw);
}
}
