📄 mainframe.java
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package covertjava.chat;import java.awt.*;import java.awt.event.*;import javax.swing.*;/** * <p>Main window of Chat</p> * <p>Copyright: Copyright (c) 2004 Sams Publishing</p> * @author Alex Kalinovsky * @version 1.0 */public class MainFrame extends JFrame implements ActionListener, MessageListener { JPanel contentPane; JMenuBar menuBar = new JMenuBar(); JMenu menuFile = new JMenu(); JMenuItem menuFileExit = new JMenuItem(); JMenu jMenuHelp = new JMenu(); JMenuItem menuHelpAbout = new JMenuItem(); JToolBar toolBar = new JToolBar(); JButton btnSend = new JButton(); JButton btnHelp = new JButton(); ImageIcon imageSend; ImageIcon imageHelp; JLabel statusBar = new JLabel(); BorderLayout borderLayout = new BorderLayout(); JSplitPane splitPane = new JSplitPane(); JMenuItem menuEditSend = new JMenuItem(); JComboBox cmbhostName = new JComboBox(); JLabel lblhostName = new JLabel(); Component filler; JScrollPane scrollPaneTop = new JScrollPane(); JScrollPane scrollPaneBottom = new JScrollPane(); JTextArea txtMessage = new JTextArea(); JEditorPane txtConversation = new JEditorPane(); StringBuffer conversation = new StringBuffer(300); /**Construct the frame*/ public MainFrame() throws Exception { this(true); } public MainFrame(boolean initChatServer) throws Exception { enableEvents(AWTEvent.WINDOW_EVENT_MASK); this.conversation.append("<HTML><BODY>"); jbInit(); if (initChatServer == true) { ChatServer.getInstance().init(); ChatServer.getInstance().setMessageListener(this); } } /**Component initialization*/ private void jbInit() throws Exception { imageSend = new ImageIcon(MainFrame.class.getResource("images/saturn_button.gif")); imageHelp = new ImageIcon(MainFrame.class.getResource("images/help_button.gif")); filler = Box.createVerticalStrut(1); setIconImage(Toolkit.getDefaultToolkit().createImage(MainFrame.class.getResource("images/saturn_small.jpg"))); contentPane = (JPanel) this.getContentPane(); contentPane.setLayout(borderLayout); this.setSize(new Dimension(400, 300)); this.setTitle("Chat Application"); statusBar.setText(" "); menuFile.setText("File"); menuFileExit.setText("Exit"); menuFileExit.addActionListener(this); jMenuHelp.setText("Help"); menuHelpAbout.setText("About"); menuHelpAbout.addActionListener(this); btnSend.addActionListener(this); btnSend.setIcon(imageSend); btnSend.setBorder(BorderFactory.createEtchedBorder()); btnSend.setMaximumSize(new Dimension(27, 27)); btnSend.setMinimumSize(new Dimension(27, 27)); btnSend.setPreferredSize(new Dimension(27, 27)); btnSend.setToolTipText("Send message"); btnHelp.setIcon(imageHelp); btnHelp.addActionListener(this); btnHelp.setBorder(BorderFactory.createEtchedBorder()); btnHelp.setMaximumSize(new Dimension(27, 27)); btnHelp.setMinimumSize(new Dimension(27, 27)); btnHelp.setPreferredSize(new Dimension(27, 27)); btnHelp.setToolTipText("Help"); splitPane.setOrientation(JSplitPane.VERTICAL_SPLIT); splitPane.setContinuousLayout(true); menuEditSend.setText("Send message"); menuEditSend.addActionListener(this); lblhostName.setText("Host Name: "); txtMessage.setLineWrap(true); txtMessage.addKeyListener(new KeyAdapter() { public void keyPressed(KeyEvent e) { if (e.getKeyCode() == KeyEvent.VK_ENTER) { e.consume(); doSendMessage(); } } }); txtConversation.setEditable(false); txtConversation.setContentType("text/html"); scrollPaneBottom.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER); cmbhostName.setEditable(true); toolBar.add(lblhostName, null); toolBar.add(cmbhostName, null); toolBar.add(btnSend); toolBar.add(filler, null); toolBar.add(btnHelp); menuFile.add(menuEditSend); menuFile.addSeparator(); menuFile.add(menuFileExit); jMenuHelp.add(menuHelpAbout); menuBar.add(menuFile); menuBar.add(jMenuHelp); this.setJMenuBar(menuBar); contentPane.add(toolBar, BorderLayout.NORTH); contentPane.add(statusBar, BorderLayout.SOUTH); contentPane.add(splitPane, BorderLayout.CENTER); splitPane.add(scrollPaneTop, JSplitPane.TOP); splitPane.add(scrollPaneBottom, JSplitPane.BOTTOM); scrollPaneBottom.getViewport().add(txtMessage, null); scrollPaneTop.getViewport().add(txtConversation, null); splitPane.setDividerLocation(160); } /**File | Exit action performed*/ public void doExit(ActionEvent e) { System.exit(0); } /**Help | About action performed*/ void doShowHelp() { AboutDialog dlg = new AboutDialog(this); Dimension dlgSize = dlg.getPreferredSize(); Dimension frmSize = getSize(); Point loc = getLocation(); dlg.setLocation((frmSize.width - dlgSize.width) / 2 + loc.x, (frmSize.height - dlgSize.height) / 2 + loc.y); dlg.setModal(true); dlg.show(); } /**Overridden so we can exit when window is closed*/ protected void processWindowEvent(WindowEvent e) { super.processWindowEvent(e); if (e.getID() == WindowEvent.WINDOW_CLOSING) { doExit(null); } } /** * Sends a message to the specified user */ void doSendMessage() { try { String host = this.cmbhostName.getEditor().getItem().toString(); String message = this.txtMessage.getText(); ChatServer.getInstance().sendMessage(host, message); appendMessage(message, null); this.txtMessage.setText(""); } catch (Exception x) { x.printStackTrace(); JOptionPane.showMessageDialog(this, x.getMessage(), "Error", JOptionPane.ERROR_MESSAGE); } } /*synchronized*/ void appendMessage(String message, MessageInfo messageInfo) { if (messageInfo == null) { this.conversation.append("<font color=\"red\">"); this.conversation.append("You"); } else { this.conversation.append("<font color=\"blue\">"); this.conversation.append(messageInfo.getDisplayName()); } this.conversation.append(": "); this.conversation.append("</font>"); this.conversation.append(message); this.conversation.append("<br>"); this.txtConversation.setText(this.conversation.toString() + "</BODY></HTML>"); } /** * Called when a new message is received */ public void messageReceived(String message, MessageInfo messageInfo) { appendMessage(message, messageInfo); } public void actionPerformed(ActionEvent event) { if (event.getSource() == this.menuEditSend || event.getSource() == this.btnSend) { doSendMessage(); } else if (event.getSource() == this.menuHelpAbout || event.getSource() == this.btnHelp) { doShowHelp(); 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