/**
* Paint the contents of the canvas.
*
* <p>Never called by you directly, instead called by Java runtime when area of screen covered by
* this container needs to be displayed (i.e., creation, uncovering, change in status)
*
* @param pen used to paint shape on the screen
*/
@Override
public void paintComponent(Graphics pen) {
pen.setColor(Color.WHITE);
pen.fillRect(0, 0, getSize().width, getSize().height);
if (myGrid != null) {
myGrid.paint((Graphics2D) pen);
}
}
