/** Update the model when the user selects a color, and repaint the window. */
public void valueChanged(ListSelectionEvent event) {
Color color = view.getSelectedColor();
model.setSelectedColor(color);
view.repaint();
}
/**
* Add a point to the model when the user drags the mouse, and repaint the window. Need more logic
* to draw solid lines.
*/
public void mouseDragged(MouseEvent event) {
Point point = event.getPoint(); // find point
model.addPoint(point);
view.repaint();
} // end method mouseDragged