Recursion - Java Software Solutions: Foundations of Program Design - page 606

LISTING 12.6 continued

titleLabel = new JLabel ("The Koch Snowflake");
titleLabel.setForeground (Color.black);

increase = new JButton ( new ImageIcon ("increase.gif"));
increase.setPressedIcon ( new ImageIcon ("increasePressed.gif"));
increase.setMargin ( new Insets (0, 0, 0, 0));
increase.addActionListener ( this );
decrease = new JButton ( new ImageIcon ("decrease.gif"));
decrease.setPressedIcon ( new ImageIcon ("decreasePressed.gif"));
decrease.setMargin ( new Insets (0, 0, 0, 0));
decrease.addActionListener ( this );

orderLabel = new JLabel ("Order: 1");
orderLabel.setForeground (Color.black);

tools.add (titleLabel);
tools.add (Box.createHorizontalStrut (20));
tools.add (decrease);
tools.add (increase);
tools.add (Box.createHorizontalStrut (20));
tools.add (orderLabel);

drawing = new KochPanel (1);

appletPanel = new JPanel();
appletPanel.add (tools);
appletPanel.add (drawing);

getContentPane().add (appletPanel);

setSize (APPLET_WIDTH, APPLET_HEIGHT);
}

//-----------------------------------------------------------------
// Determines which button was pushed, and sets the new order
// if it is in range.
//-----------------------------------------------------------------
public void actionPerformed (ActionEvent event)
{
int order = drawing.getOrder();

if (event.getSource() == increase)
order++;
else
order--;