This is the application method that processes commands sent by the GUI
if (command.equals("clear")) { // clear the GUI window
// It would be more modular to include this functionality in the GUI
// class itself. But for demonstration purposes, we do it here.
Graphics g = window.getGraphics();
g.setColor(window.getBackground());
g.fillRect(0, 0, window.getSize().width, window.getSize().height);
}
else if (command.equals("print")) {} // not yet implemented
else if (command.equals("quit")) { // quit the application
window.dispose(); // close the GUI
System.exit(0); // and exit.
}
