// Written by Dr. Deborah Hwang for CS 350 // Pizza Parlor Order Form Java application import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.io.*; import java.net.*; import java.util.*; public class PizzaApp3 extends JPanel // application is a JPanel { // Network elements Socket socket; PrintWriter out; BufferedReader in; boolean connected = false; final boolean DEBUG = true; JTextField portField; // The components that are named for entire application JFrame frame; // outer frame JTextField nameField; JTextArea addressField; JTextArea debugArea; JRadioButton[] sizeButtons; JCheckBox[] toppingsBoxes; final int numButtons = 4; final int numBoxes = 6; public PizzaApp3 (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 label with HTML decorated text JLabel title = new JLabel ("" + "Purple Pizza Parlor", JLabel.CENTER); // Pad the title on top and bottom title.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 options panel with sizes and toppings JPanel optionsPanel = new JPanel(); optionsPanel.add (sizePanel); optionsPanel.add (toppingsPanel); // Create port panel JPanel portPanel = new JPanel(); portPanel.add (new JLabel ("Enter server port number here: ")); portField = new JTextField (10); portPanel.add (portField); // 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 (optionsPanel); centerPanel.add (buttonPanel); centerPanel.add (portPanel); // 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 (title, 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 () { JPanel panel = new JPanel(new GridLayout(0,1)); final String[] sizes = {"Small", "Medium", "Large", "Extra Large"}; ButtonGroup sizeButtonGroup = new ButtonGroup(); // create button group sizeButtons = new JRadioButton[numButtons]; // Create an action listener ActionListener radioListener = new ActionListener() // anonymous inner class { public void actionPerformed (ActionEvent e) // handler { String size = e.getActionCommand(); debugArea.append (size + " has been chosen.\n"); debugArea.setCaretPosition( debugArea.getDocument().getLength()); } // end actionPerformed }; // end ActionListener for (int i = 0; i < numButtons; i++) { // Create radio button and add it to button group and panel sizeButtons[i] = new JRadioButton (sizes[i]); sizeButtonGroup.add (sizeButtons[i]); panel.add(sizeButtons[i]); // Set action command (for clicks) // and add the listener to each button sizeButtons[i].setActionCommand(sizes[i]); sizeButtons[i].addActionListener(radioListener); } // end for // Make Large the default choice sizeButtons[2].setSelected(true); // Add compound border around panel panel.setBorder(BorderFactory.createCompoundBorder( BorderFactory.createTitledBorder("Choose one:"), BorderFactory.createEmptyBorder(5,5,5,5))); return panel; } // end createSizePanel private JPanel createToppingsPanel() { JPanel panel = new JPanel (new GridLayout(0,1)); final String[] toppings = {"Italian Sausage", "Hamburger", "Pepperoni", "Onions", "Green Peppers", "Mushrooms"}; toppingsBoxes = new JCheckBox[numBoxes]; // Create an item listener ItemListener boxListener = new ItemListener () // anonymous inner class { public void itemStateChanged (ItemEvent e) // handler { for (int i = 0; i < numBoxes; i++) { Object source = e.getItemSelectable(); if (source == toppingsBoxes[i]) { String text = toppings[i] + " was "; if (e.getStateChange() == ItemEvent.DESELECTED) text = text + "unchecked.\n"; else text = text + "checked.\n"; debugArea.append (text); debugArea.setCaretPosition( debugArea.getDocument().getLength()); break; } // end if } // end for } // end itemStateChanged }; // end ItemListener for (int i = 0; i < numBoxes; i++) { // Create checkbox and add it to panel toppingsBoxes[i] = new JCheckBox (toppings[i]); panel.add (toppingsBoxes[i]); // Add the listener to each box toppingsBoxes[i].addItemListener (boxListener); } // end for // Add compound border around panel panel.setBorder(BorderFactory.createCompoundBorder( BorderFactory.createTitledBorder("Choose from:"), BorderFactory.createEmptyBorder(5,5,5,5))); 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 ActionListener buttonListener = new ActionListener () // anonymous inner class { public void actionPerformed (ActionEvent e) // handler { String command = e.getActionCommand(); int port = 0; 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 if (portField.getText().equals("")) { JOptionPane.showMessageDialog( frame, "Port field must be filled in.", "Port field missing", JOptionPane.ERROR_MESSAGE); return; } // end port field check if (!connected) // We need to attempt a rendezvous. { if (DEBUG) debugArea.append( "connected = false; about to attempt a rendezvous.\n"); // Get the port the user entered... try { port = Integer.parseInt(portField.getText()); debugArea.append ("Connecting to port # " + port + "\n"); } // end try catch (NumberFormatException ex) // Non-integer entered. { debugArea.append("Please enter a valid port number above\n"); return; } // end catch //...and rendezvous with it. rendezvous(port); if (!connected) // rendezvous failed { debugArea.append ("Connecting to port # " + port + " failed\n"); return; } // end if } // end attempt to rendevous // Send data over. if (DEBUG) debugArea.append("connected = true; about to send data.\n"); try { out.println(nameField.getText()); out.println(addressField.getText()); out.println("AddrEnd"); // in case address has newlines in it for (int i = 0; i < sizeButtons.length; i++) if (sizeButtons[i].isSelected()) { out.println(sizeButtons[i].getText()); break; // only one can be selected } // end if for (int i = 0; i < toppingsBoxes.length; i++) if (toppingsBoxes[i].isSelected()) out.println (toppingsBoxes[i].getText()); out.println("TopEnd"); // To mark end of toppings list. out.flush(); // Move data out of buffer } // end try /* catch (IOException ex) { debugArea.append("ERROR: Couldn't write to socket.\n"); debugArea.append("...Disconnecting.\n"); cleanup(); return; } // end catch writing errors */ catch (NullPointerException ex) { debugArea.append("ERROR: No output stream!\n"); debugArea.append("...Disconnecting.\n"); cleanup(); return; } // end catch stream error // Receive response message back debugArea.append ("Order sent. Waiting for response.\n"); try { String message = in.readLine(); debugArea.append ("Response is:\n"); while (!message.equals("End")) { debugArea.append(message + "\n"); message = in.readLine(); } // end reading response message lines } // end try catch (IOException ex) { debugArea.append("Couldn't read from socket.\n"); debugArea.append("...Disconnecting.\n"); cleanup(); return; } // end catch debugArea.setCaretPosition( debugArea.getDocument().getLength()); } // end Submit else if (command == "Reset") { nameField.setText (""); addressField.setText (""); for (int i = 0; i < numButtons; i++) sizeButtons[i].setSelected(false); sizeButtons[2].setSelected(true); for (int i = 0; i < numBoxes; i++) toppingsBoxes[i].setSelected(false); 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 ActionListener // Set action command and add listener to each button submit.setActionCommand("Submit"); submit.addActionListener (buttonListener); reset.setActionCommand("Reset"); reset.addActionListener (buttonListener); quit.setActionCommand("Quit"); 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 // Sets up socket connection to server private void rendezvous(int port) { String host = "csserver.evansville.edu"; // Try to open a socket to the port. if (DEBUG) debugArea.append ("attempting to connect to " + host + ":" + port +"\n"); try { socket = new Socket(host, port); } catch (UnknownHostException e) { debugArea.append("ERROR: Can't find host: " + host + "\n"); cleanup(); return; } catch (IOException e) { debugArea.append("ERROR: Can't open socket on rendezvous port " + port + " (on host " + host + ").\n"); debugArea.append("Check http://csserver.evansville.edu/~hwang/f06-courses/cs350/PizzaPort.txt\n"); debugArea.append("for current port number or server is down\n"); cleanup(); return; } //Try to open streams to read and write to the socket. if (DEBUG) debugArea.append ("attempting to set up socket streams\n"); try { out = new PrintWriter(socket.getOutputStream(), true); } catch (IOException e) { debugArea.append("ERROR: Can't open output stream.\n"); cleanup(); return; } try { in = new BufferedReader( new InputStreamReader(socket.getInputStream())); } catch (IOException e) { debugArea.append("ERROR: Can't open input stream\n"); cleanup(); return; } if ((out != null) && (in != null)) { portField.setEditable(false); } else { debugArea.append("ERROR: Port connected, but I/O problems.\n"); debugArea.append("Please TRY AGAIN.\n"); cleanup(); return; } // end else connected = true; if (DEBUG) debugArea.append("streams connected\n"); debugArea.setCaretPosition(debugArea.getDocument().getLength()); } // end rendevous // cleans up streams private void cleanup() { if (DEBUG) debugArea.append("cleaning up\n"); connected = false; portField.setEditable(true); // close down all the streams try { if (in != null) { in.close(); in = null; } // end if } // end try catch (Exception e) {} //Ignore errors. try { if (out != null) { out.close(); out = null; } // end if } // end try catch (Exception e) {} //Ignore errors. try { if (socket != null) { socket.close(); socket = null; } // end if } // end try catch (Exception e) {} //Ignore errors. debugArea.setCaretPosition(debugArea.getDocument().getLength()); } // end cleanup // 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 frame.setLayout(new GridLayout(1,1)); frame.add(new PizzaApp3 (frame)); // 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 PizzaApp3