// Written by Dr. Deborah Hwang for CS 350 // Pizza Parlor Order Form Java application, version 2 // Combo boxes, lists, dialogs, file output import javax.swing.*; import javax.swing.event.*; // ListSelectionListener import java.awt.*; import java.awt.event.*; import java.io.*; public class PizzaApp2 extends JPanel // application is a JPanel { // The components that are named for entire application JFrame frame; // outer frame JTextField nameField; JTextArea addressField; JTextArea debugArea; JComboBox sizeList; JList toppingsList; final String[] toppings = {"Italian Sausage", "Hamburger", "Pepperoni", "Onions", "Green Peppers", "Mushrooms"}; public PizzaApp2 (JFrame frame) // constructor { // initialize layout manager using superclass constructor // super class construction must always be first super (new BorderLayout()); this.frame = frame; // Create the components // Create title panel with HTML decorated label JPanel titlePanel = new JPanel(); titlePanel.add (new JLabel ("" + "Purple Pizza Parlor", JLabel.CENTER)); // Pad the title on top and bottom titlePanel.setBorder(BorderFactory.createEmptyBorder(10,0,10,0)); // Create other panels JPanel namePanel = createNamePanel(); JPanel addressPanel = createAddressPanel(); JPanel sizePanel = createSizePanel(); JPanel toppingsPanel = createToppingsPanel(); JPanel buttonPanel = createButtonPanel(); // Create center panel in a horizontal column JPanel centerPanel = new JPanel(); centerPanel.setLayout (new BoxLayout (centerPanel, BoxLayout.PAGE_AXIS)); centerPanel.add (namePanel); centerPanel.add (addressPanel); centerPanel.add (sizePanel); centerPanel.add (toppingsPanel); centerPanel.add (buttonPanel); // Create the debug area at bottom with vertical scrollbar debugArea = new JTextArea ("The status of your order is:\n", 10, 40); JScrollPane debugScrollPane = new JScrollPane ( debugArea, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER); debugArea.setEditable (false); // Lay out the main panel add (titlePanel, BorderLayout.PAGE_START); add (centerPanel, BorderLayout.CENTER); add (debugScrollPane, BorderLayout.PAGE_END); } // end constructor private JPanel createNamePanel () { JPanel panel = new JPanel (); nameField = new JTextField(20); panel.add (new JLabel ("Name: ")); panel.add (nameField); return panel; } // end createNamePanel private JPanel createAddressPanel () { JPanel panel = new JPanel (); addressField = new JTextArea(3, 20); panel.add (new JLabel ("Address: ")); panel.add (addressField); return panel; } // end createAddressPanel private JPanel createSizePanel () { final String[] sizes = {"Small", "Medium", "Large", "Extra Large"}; JPanel panel = new JPanel(); sizeList = new JComboBox(sizes); // Make Large the default choice sizeList.setSelectedIndex (2); // Add listener sizeList.addActionListener( new ActionListener() // anonymous inner class { public void actionPerformed (ActionEvent e) // handler { JComboBox cb = (JComboBox) e.getSource(); String size = (String) cb.getSelectedItem(); debugArea.append (size + " has been chosen.\n"); debugArea.setCaretPosition( debugArea.getDocument().getLength()); } // end actionPerformed }); // end ActionListener panel.add (new JLabel ("Choose one: ")); panel.add (sizeList); return panel; } // end createSizePanel private JPanel createToppingsPanel() { JPanel panel = new JPanel (); toppingsList = new JList (toppings); // Add listener toppingsList.addListSelectionListener( new ListSelectionListener () // anonymous inner class { public void valueChanged (ListSelectionEvent e) // handler { if (!e.getValueIsAdjusting()) // user is done selecting { String text = null; int[] indices = toppingsList.getSelectedIndices(); for (int i = 0; i < indices.length; i++) { if (text == null) text = toppings[indices[i]]; else text = text + ", " + toppings[indices[i]]; } // end for if (text == null) text = "No toppings are selected\n"; else text = text + " are selected\n"; debugArea.append (text); debugArea.setCaretPosition( debugArea.getDocument().getLength()); } // end if } // end valueChanged }); // end ListSelectionListener panel.add (new JLabel ("Choose from: ")); panel.add (toppingsList); return panel; } // end createSizePanel private JPanel createButtonPanel() { JPanel panel = new JPanel(); // default layout is FlowLayout JButton submit = new JButton ("Submit"); JButton reset = new JButton ("Reset"); JButton quit = new JButton ("Quit"); // Create an action listener ButtonListener buttonListener = new ButtonListener (); // Set action command and add listener to each button submit.setActionCommand("Submit"); submit.setMnemonic(KeyEvent.VK_S); submit.addActionListener (buttonListener); reset.setActionCommand("Reset"); reset.setMnemonic(KeyEvent.VK_R); reset.addActionListener (buttonListener); quit.setActionCommand("Quit"); quit.setMnemonic(KeyEvent.VK_Q); quit.addActionListener (buttonListener); // Set default button (when Enter is pressed) frame.getRootPane().setDefaultButton(submit); // Lay out panel panel.add (submit); panel.add (reset); panel.add (quit); return panel; } // end createButtonPanel public JMenuBar createMenuBar() { JMenuBar menuBar; JMenu menu, submenu; JMenuItem menuItem; // Create an action listener ButtonListener buttonListener = new ButtonListener (); // Create the menu bar. menuBar = new JMenuBar(); // Build the first menu. Add it to menu bar. menu = new JMenu("Actions"); menu.setMnemonic(KeyEvent.VK_A); menuBar.add(menu); // A group of JMenuItems, add them to menu menuItem = new JMenuItem("Submit"); menuItem.setActionCommand("Submit"); menuItem.addActionListener (buttonListener); menu.add(menuItem); menuItem = new JMenuItem("Reset"); menuItem.setActionCommand("Reset"); menuItem.addActionListener (buttonListener); menu.add(menuItem); menuItem = new JMenuItem("Quit"); menuItem.setActionCommand("Quit"); menuItem.addActionListener (buttonListener); menu.add(menuItem); // Build a submenu, add it to menu menu.addSeparator(); submenu = new JMenu("A submenu"); menuItem = new JMenuItem("An item in the submenu"); submenu.add (menuItem); menuItem = new JMenuItem("Another item in the submenu"); submenu.add (menuItem); menu.add(submenu); // Build second menu in the menu bar. menu = new JMenu("About"); menu.setMnemonic(KeyEvent.VK_B); menuBar.add(menu); return menuBar; } // createMenuBar // Named inner class so buttons and menu can share same listener class ButtonListener implements ActionListener { public void actionPerformed (ActionEvent e) // handler { String command = e.getActionCommand(); if (command == "Submit") { // error check if (nameField.getText().equals("")) { JOptionPane.showMessageDialog( frame, "Name field must be filled in.", "Name field missing", JOptionPane.ERROR_MESSAGE); return; } // if name missing if (addressField.getText().equals("")) { JOptionPane.showMessageDialog( frame, "Address field must be filled in.", "Address field missing", JOptionPane.ERROR_MESSAGE); return; } // if address missing // open and write to file PrintWriter outputStream = null; try { outputStream = new PrintWriter( new FileWriter( "output/orders.txt", true)); // for append outputStream.println("Name: " + nameField.getText()); outputStream.println("Address:\n" + addressField.getText()); outputStream.println("Size: " + sizeList.getSelectedItem()); outputStream.print("Toppings: "); int [] indices = toppingsList.getSelectedIndices(); for (int i = 0; i < indices.length-1; i++) outputStream.print (toppings[indices[i]] + ", "); if (indices.length > 0) outputStream.println ( toppings[indices[indices.length-1]]); else outputStream.println ("none"); outputStream.println ("-----------------------------"); outputStream.flush(); } catch (IOException ex) { debugArea.append("Error opening output file\n"); debugArea.setCaretPosition( debugArea.getDocument().getLength()); return; } finally { if (outputStream != null) outputStream.close(); } debugArea.append ("Your order has been submitted\n"); debugArea.setCaretPosition( debugArea.getDocument().getLength()); } // end Submit else if (command == "Reset") { nameField.setText (""); addressField.setText (""); sizeList.setSelectedIndex(2); toppingsList.clearSelection(); debugArea.setText ("The status of your order is:\n"); } // end Reset else if (command == "Quit") { System.exit(0); } // end Quit else System.out.println ("Unknown command"); } // end actionPerformed } // end ButtonListener // Every Swing application will have these two functions // Create the GUI and show it. For thread safety, this method should // be invoked from the event-dispatching thread. private static void createAndShowGUI() { // Make sure we have nice window decorations. JFrame.setDefaultLookAndFeelDecorated(true); // Create and set up the main window. JFrame frame = new JFrame("Purple Pizza Parlor Order Form"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Set up the main frame panel, // only the application itself is created and added PizzaApp2 app = new PizzaApp2 (frame); frame.setLayout(new GridLayout(1,1)); frame.add(app); frame.setJMenuBar(app.createMenuBar()); // Display the window. frame.pack(); frame.setVisible(true); } // createAndShowGUI public static void main(String[] args) { // Schedule a job for the event-dispatching thread: // creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater( new Runnable() // anonymous inner class { public void run() // from Runnable interface { createAndShowGUI(); } // end run }); // end new Runnable } // end main } // end PizzaApp2