chatpanel.java

一个类似QQ的在线通讯聊天软件原码,适合初学者参考学习。

package openicq.gui;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.util.Date;

import javax.swing.*;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;

import openicq.Start;
import openicq.data.Resource;

import org.javalib.document.RTFDocument;
import org.javalib.gui.SpringToolkit;

import JOscarLib.Tool.OscarInterface;

/**
 * The <code>ChatPanel</code> class is the basic panel for writing new
 * messages.
 * @author Hansgeorg Schwibbe
 * @copyright 2004
 */
public class ChatPanel extends JPanel
{
  private ChatFrame chatFrame;

  private JPanel jPanelHistory = new JPanel();

  private JPanel jPanelMessage = new JPanel();

  private JPanel jPanelButton = new JPanel();

  private JScrollPane jScrollPaneHistory = new JScrollPane();

  private JScrollPane jScrollPaneMessage = new JScrollPane();

  private RTFDocument doc = new RTFDocument();

  private JTextPane jTextPaneHistory = new JTextPane();

  protected JTextArea jTextAreaMessage = new JTextArea();

  protected JLabel jLabelMessage = new JLabel();

  protected JLabel jLabelHistory = new JLabel();

  protected JButton jButtonSend = new JButton();

  protected JButton jButtonClose = new JButton();

  /**
   * Initializes a new instance of the class <code>ChatPanel</code>.
   * @param parent the parent frame
   */
  public ChatPanel(JFrame parent)
  {
    this.chatFrame = (ChatFrame) parent;
    // History panel
    jPanelHistory.setPreferredSize(new Dimension(420, 162));
    jPanelHistory.setLayout(new BorderLayout());
    jLabelHistory.setIcon(new ImageIcon(Resource.ICON_SOURCE_TYPES[0]));
    jTextPaneHistory.setContentType("text/rtf");
    jTextPaneHistory.setEditable(false);
    jScrollPaneHistory.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
    jScrollPaneHistory.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
    jScrollPaneHistory.getViewport().add(jTextPaneHistory, null);
    jPanelHistory.add(jLabelHistory, BorderLayout.NORTH);
    jPanelHistory.add(jScrollPaneHistory, BorderLayout.CENTER);
    // Message panel
    jPanelMessage.setPreferredSize(new Dimension(420, 92));
    jPanelMessage.setLayout(new BorderLayout());
    jLabelMessage.setIcon(new ImageIcon(Resource.ICON_SOURCE_TYPES[1]));
    jTextAreaMessage.setLineWrap(true);
    jTextAreaMessage.setForeground(Color.BLUE);
    jTextAreaMessage.addCaretListener(new CaretListener()
    {
      public void caretUpdate(CaretEvent e)
      {
        action_updateInputStatus();
      }
    });
    jScrollPaneMessage.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
    jScrollPaneMessage.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
    jScrollPaneMessage.getViewport().add(jTextAreaMessage, null);
    jPanelMessage.add(jLabelMessage, BorderLayout.NORTH);
    jPanelMessage.add(jScrollPaneMessage, BorderLayout.CENTER);
    // Button panel
    jPanelButton.setPreferredSize(new Dimension(420, 35));
    jPanelButton.setLayout(new FlowLayout());
    jButtonSend.setEnabled(false);
    jButtonSend.addActionListener(new java.awt.event.ActionListener()
    {
      public void actionPerformed(ActionEvent e)
      {
        action_sendMessage();
      }
    });
    jButtonSend.setFocusable(false);
    jButtonClose.addActionListener(new java.awt.event.ActionListener()
    {
      public void actionPerformed(ActionEvent e)
      {
        action_closeWindow();
      }
    });
    jButtonClose.setFocusable(false);
    jPanelButton.add(jButtonSend, null);
    jPanelButton.add(jButtonClose, null);
    // This panel
    this.setLayout(new SpringLayout());
    this.add(jPanelHistory);
    this.add(jPanelMessage);
    this.add(jPanelButton);
    SpringToolkit.makeCompactGrid(this, 3, 1, 0, 0, 0, 0);
  }

  /**
   * Action 'Send message'.
   */
  protected void action_sendMessage()
  {
    jTextAreaMessage.requestFocus();
    StringBuffer message = new StringBuffer(jTextAreaMessage.getText());
    // Filter the message
    while (message.length() > 0 && message.charAt(0) < 33)
    {
      message.deleteCharAt(0);
    }
    while (message.length() > 0 && message.charAt(message.length() - 1) < 33)
    {
      message.deleteCharAt(message.length() - 1);
    }
    // Send message
    synchronized (Start.env)
    {
      if (message.length() > 0 && Start.env.getConnection() != null
          && Start.env.getConnection().isLogged())
      {
        OscarInterface.sendMessage(Start.env.getConnection(),
                                   chatFrame.getContactId(), message.toString());
        Date date = new Date();
        this.addMessage(((String[]) chatFrame.localized.get("chat"))[4] + " ("
                        + date.toString() + "):", message.toString() + "\n",
                        RTFDocument.BLUE);
        jTextAreaMessage.setText("");
      }
      else
      {
        String msg = ((String[]) chatFrame.localized.get("errorMessages"))[15]
                     + "\n"
                     + ((String[]) chatFrame.localized.get("errorMessages"))[1];
        String title = ((String[]) chatFrame.localized.get("messageTitles"))[0];
        JOptionPane.showMessageDialog(chatFrame, msg, title,
                                      JOptionPane.ERROR_MESSAGE);
      }
    }
  }

  /**
   * Action 'Update the input status'.
   */
  protected void action_updateInputStatus()
  {
    StringBuffer message = new StringBuffer(jTextAreaMessage.getText());
    // Filter the message
    while (message.length() > 0 && message.charAt(0) < 33)
    {
      message.deleteCharAt(0);
    }
    while (message.length() > 0 && message.charAt(message.length() - 1) < 33)
    {
      message.deleteCharAt(message.length() - 1);
    }
    // Show the status
    if (message.length() > 0)
    {
      jButtonSend.setEnabled(true);
      jLabelMessage.setText(((String[]) chatFrame.localized.get("chat"))[1]
                            + " (" + message.length() + " "
                            + ((String[]) chatFrame.localized.get("chat"))[2]
                            + ")");
    }
    else
    {
      jButtonSend.setEnabled(false);
      jLabelMessage.setText(((String[]) chatFrame.localized.get("chat"))[1]);
    }
  }

  /**
   * Aktion 'Close the window'.
   */
  protected void action_closeWindow()
  {
    chatFrame.setVisible(false);
    jTextAreaMessage.setText("");
  }

  /**
   * Appends a new chat message to the end of the history.
   * @param head the header of the message
   * @param message the message
   * @param color the color of the message
   */
  protected void addMessage(String head, String message, int color)
  {
    doc.println(head, 2, new int[]
    {
     color,
     RTFDocument.BOLD
    });
    doc.println(message, 2, new int[]
    { color
    });
    jTextPaneHistory.setText(doc.toString());
    int length = jTextPaneHistory.getDocument().getLength();
    jTextPaneHistory.setCaretPosition(length);
  }
}