// Method to open a file for sequential read-only.
private void openFile() {
// Define local primitive(s).
String contents = new String();
// If a file is open, prompt to save the file before dismissing content
// and reference.
if (!file.toString().equals("")) {
// Close the existing file.
closeFile();
} // End of if file not null or not equal to a zero String.
// Open a file.
fileName = FileIO.findFile(this);
// If a file name is returned.
if (fileName != null) {
// Read file.
contents = FileIO.openFile(this, fileName);
// Verify that the JTextAreaPanel is empty.
if (sender.isTextAreaEmpty()) {
// Set JTextAreaPanel.
sender.setText(contents);
} // End of if JTextAreaPanel is empty.
else {
// Reset JTextAreaPanel by replacing the range.
sender.replaceRange(contents, 0, sender.getText().length());
} // End of else JTextAreaPanel is not empty.
// Set file open flag to true.
fileOpen = true;
} // End of if a fileName is selected.
} // End of openFile method.
// Method to closeFile().
private void closeFile() {
// Dismiss file reference.
fileName = new File("");
// If JTextAreaPanel contains text.
if (!sender.isTextAreaEmpty()) {
// Clear display area.
sender.replaceRange(null, 0, sender.getText().length());
} // End of if check if JTextAreaPanel contains text.
} // End of closeFile() method.
// Define method to return commands.
private void buildFrame(int width, int height) {
// Set JFrame title.
setTitle("Communicator");
// Initialize and set policies for JScrollPane(s).
receiverScrollPane =
setScrollPaneProperties(new JScrollPane(receiver = new JTextAreaPanel(COL, ROW)));
senderScrollPane =
setScrollPaneProperties(new JScrollPane(sender = new JTextAreaPanel(COL, ROW)));
// Disable editability of receiver JTextAreaPanel.
receiver.setEditable(false);
// Initialize JButtonPanel.
button = new JButtonPanel();
// Define and initialize JButton(s).
buildButtons();
// Set panel size.
setSize(width, height);
// Set JPanel Layout.
getContentPane().setLayout(new BorderLayout());
// Add a JTextAreaPanel(s).
getContentPane().add(receiverScrollPane, BorderLayout.NORTH);
getContentPane().add(button, BorderLayout.CENTER);
getContentPane().add(senderScrollPane, BorderLayout.SOUTH);
// Build JMenuBar.
buildMenu();
// Build JButton action listeners.
buildButtonActionListeners();
// Set the screen and display dialog window in relation to screen size.
dim = tk.getScreenSize();
setLocation((dim.width / 100), (dim.height / 100));
// --------------------- Begin Window ActionListener ---------------------/
// Add window listener to the frame.
addWindowListener(
new WindowAdapter() {
public void windowClosing(WindowEvent closingEvent) {
// Exit on window frame close.
System.exit(0);
} // End of windowClosing() method.
}); // End of addWindowListener() method for JFrame.
// Set resizeable window off.
setResizable(false);
// Display the JFrame to the platform window manager.
show();
} // End of buildFrame() method.
// Define a setMessage() method.
private void setMessage(JTextAreaPanel out, JTextAreaPanel in) {
// Try to get incoming message.
try {
// Send message text.
in.setMessage(out.getText());
// Consume sent message text.
out.replaceRange(null, 0, out.getText().length());
} // End of try to get message.
// Catch BufferEmptyException.
catch (BufferEmptyException e) {
// Capture the stack trace into a String.
setExceptionString(e.fillInStackTrace());
// Pass message to the JOptionPane manager.
setExceptionPane(
"There is nothing in the buffer to send.\n\n" + "Do you want to see the stack trace?");
} // End of catch on BufferEmptyException.
} // End of setMessage() method.
// Define a getMessage() method.
private void getMessage(JTextAreaPanel in) {
// Try to get incoming message.
try {
// Receive message text.
in.getMessage();
} // End of try to get message.
catch (BufferEmptyException e) // Catch BufferEmptyException.
{
// Capture the stack trace into a String.
setExceptionString(e.fillInStackTrace());
// Pass message to the JOptionPane manager.
setExceptionPane(
"There is nothing in the buffer to receive.\n\n" + "Do you want to see the stack trace?");
} // End of catch on BufferEmptyException.
} // End of getMessage() method.
// Method to saveFile().
private void saveFile() {
// If a file name is returned.
if (fileName != null) {
// Try block to throw a custom exception.
try {
// Save file.
FileIO.saveFile(this, fileName, sender.getText());
} // End of try to get message.
catch (BufferEmptyException e) // Catch InvalidFileReference.
{
// Capture the stack trace into a String.
setExceptionString(e.fillInStackTrace());
// Pass message to the JOptionPane manager.
setExceptionPane(
"There is nothing in the sender panel to write.\n\n"
+ "Do you want to see the stack trace?");
} // End of catch on BufferEmptyException.
} // End of if a fileName is selected.
} // End of saveFile() method.
