/** Make the frame for the user interface. */
private void makeFrame() {
frame = new JFrame(calc.getTitle());
JPanel contentPane = (JPanel) frame.getContentPane();
contentPane.setLayout(new BorderLayout(8, 8));
contentPane.setBorder(new EmptyBorder(20, 20, 20, 20));
display = new JTextField();
contentPane.add(display, BorderLayout.NORTH);
JPanel buttonPanel = new JPanel(new GridLayout(5, 4));
addButton(buttonPanel, "7");
addButton(buttonPanel, "8");
addButton(buttonPanel, "9");
addButton(buttonPanel, "Cl");
// had to change this, so it works in hexadecimal mode
addButton(buttonPanel, "4");
addButton(buttonPanel, "5");
addButton(buttonPanel, "6");
addButton(buttonPanel, "?");
addButton(buttonPanel, "1");
addButton(buttonPanel, "2");
addButton(buttonPanel, "3");
addButton(buttonPanel, "0");
addButton(buttonPanel, "+");
addButton(buttonPanel, "-");
// Exercise 1 division
addButton(buttonPanel, "/");
// Exercise 1 multi
addButton(buttonPanel, "*");
addButton(buttonPanel, "=");
contentPane.add(buttonPanel, BorderLayout.CENTER);
status = new JLabel(calc.getAuthor());
contentPane.add(status, BorderLayout.SOUTH);
// hexa stuff
JPanel hexContainer = new JPanel(new GridLayout(2, 1));
JCheckBox hexBox = new JCheckBox("Hexadecimal mode");
hexBox.addActionListener(this);
hexContainer.add(hexBox);
hexPanel = new JPanel(new GridLayout(2, 3));
addButton(hexPanel, "A");
addButton(hexPanel, "B");
addButton(hexPanel, "C");
addButton(hexPanel, "D");
addButton(hexPanel, "E");
addButton(hexPanel, "F");
hexContainer.add(hexPanel);
hexPanel.setVisible(false); // hide it because we start in decimal mode
contentPane.add(hexContainer, BorderLayout.EAST);
frame.pack();
}
/**
* Toggle the info display in the calculator's status area between the author and version
* information.
*/
private void showInfo() {
if (showingAuthor) status.setText(calc.getVersion());
else status.setText(calc.getAuthor());
showingAuthor = !showingAuthor;
}