?? jprivatemessage.java
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import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
public class JPrivateMessage extends JFrame implements ActionListener
{
private JEditorPane txtConversation = new JEditorPane();
private JTextArea txtSend = new JTextArea();
private JButton btnSend = new JButton("Send");
private CPrivateMessageListener listener;
private JScrollPane scrlConversation;
public String localUsername;
public String remoteUsername;
// Message Data items
private String messageHeader = "<html><body>";
private String messageFooter = "</body></html>";
public JPrivateMessage(CPrivateMessageListener l, String title, String localUser, String remoteUser)
{
super(title);
listener = l;
localUsername = localUser;
remoteUsername = remoteUser;
// Setup the controls
controlsSetup();
pack();
// Catch pressing the [x] and call the close event
this.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
listener.onClosePrivateMessage(remoteUsername);
}
});
setVisible(true);
}
private void controlsSetup()
{
// Create the conversation label
JLabel lblConversation = new JLabel("Conversation:");
// Create the conversation text area
txtConversation.setEditable(false);
txtConversation.setContentType("text/html");
txtConversation.setText("<html><p style=\"font-family:verdana\">Welcome</p></html>");
// Create the conversation scroll pane
scrlConversation = new JScrollPane(txtConversation);
scrlConversation.setVerticalScrollBarPolicy(
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
scrlConversation.setPreferredSize(new Dimension(400,300));
scrlConversation.setMinimumSize(new Dimension(10, 10));
// Create the lefttop pane
JPanel lefttopPane = new JPanel();
BoxLayout lefttopBox = new BoxLayout(lefttopPane, BoxLayout.Y_AXIS);
lefttopPane.setLayout(lefttopBox);
lefttopPane.add(lblConversation);
lefttopPane.add(scrlConversation);
// Create the send label
JLabel lblSend = new JLabel("Send Message:");
// Create the send text scroll pane and the send button
JScrollPane scrlSend = new JScrollPane(txtSend);
scrlSend.setVerticalScrollBarPolicy(
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
scrlSend.setPreferredSize(new Dimension(330, 30));
scrlSend.setMinimumSize(new Dimension(10, 10));
// Set the send button properties
btnSend.setPreferredSize(new Dimension(70,30));
btnSend.setMinimumSize(new Dimension(10, 10));
btnSend.addActionListener(this);
// Set the send pane
JPanel sendPane = new JPanel();
BoxLayout sendBox = new BoxLayout(sendPane, BoxLayout.X_AXIS);
sendPane.setLayout(sendBox);
sendPane.add(scrlSend);
sendPane.add(btnSend);
// Create the leftbottom pane
JPanel leftbottomPane = new JPanel();
BoxLayout leftBottomBox = new BoxLayout(leftbottomPane, BoxLayout.Y_AXIS);
leftbottomPane.setLayout(leftBottomBox);
leftbottomPane.add(lblSend);
leftbottomPane.add(sendPane);
// Create the left split pane
JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
lefttopPane,
leftbottomPane);
splitPane.setOneTouchExpandable(false);
splitPane.setDividerLocation(300);
splitPane.setPreferredSize(new Dimension(400, 400));
setContentPane(splitPane);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource() == btnSend)
{
String message = txtSend.getText().replaceAll("\n", "<br>");
// Replace all new lines with <br> tags when we send the data
listener.onSendMessage(remoteUsername, message);
// Add the local message to the conversation window
addMessage("<p><b>" + localUsername + ": </b>" + message + "</p>");
txtSend.setText("");
}
}
public void messageReceived(String message)
{
addMessage("<p><b>" + remoteUsername + ": </b>" + message + "</p>");
}
public void userLeft()
{
addMessage("<p><b>" + remoteUsername + " has disconnected</b></p>");
// Disable the send button
btnSend.setEnabled(false);
}
private void addMessage(String message)
{
messageHeader += message;
txtConversation.setText(messageHeader + messageFooter);
txtConversation.selectAll();
txtConversation.setCaretPosition(txtConversation.getSelectedText().length());
}
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