mainpanel.java

一个用java写的mail.里面的代码值得我们去研究！学习。

/*
** $Id: MainPanel.java,v 1.6 2001/05/07 12:37:22 kunugi Exp $
**
** Copyright (c) 2000-2001 Jeff Gay
** on behalf of ICEMail.org <http://www.icemail.org>
** Copyright (c) 1998-2000 by Timothy Gerard Endres
** 
** This program is free software.
** 
** You may redistribute it and/or modify it under the terms of the GNU
** General Public License as published by the Free Software Foundation.
** Version 2 of the license should be included with this distribution in
** the file LICENSE, as well as License.html. If the license is not
** included with this distribution, you may find a copy at the FSF web
** site at 'www.gnu.org' or 'www.fsf.org', or you may write to the
** Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139 USA.
**
** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
** REDISTRIBUTION OF THIS SOFTWARE. 
*/

package org.icemail.mail;

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Image;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener; 

import java.io.IOException;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
import javax.swing.JTextField;
import javax.swing.JToolBar;

import org.icemail.Package; 

import org.icemail.util.AWTUtilities; 
import org.icemail.util.ComponentFactory; 


/**
 * Class MainPanel
 * <p>
 * This class implements ActionDistributor, distributing ActionEvents from other
 * originators to the sub-panels.
 */
public class MainPanel
  extends JPanel
  implements ActionDistributor, StatusBar
{
  private static final int Debug_ = Package.DEBUG ? Package.getLevel( "MainPanel" ) : 0;

  private JToolBar         toolBar;
  private JSplitPane       splitPane;

  private JTextField       statusText;
  private JTextField       folderNameText;
  private JTextField       numMsgsText;
  private JTextField       msgNumText;

// sub-panels and event distributors
  private FolderTreePanel  treePanel_;
  private MessagePanel     messagePanel_;


  public
  MainPanel() {
    super();
    
    setDoubleBuffered( true );

    establishContents();

    loadLayoutProperties();
  }

  public void
  loadLayoutProperties() {
    int loc = Configuration.getDividerLocation( Configuration.P_MAIN_PANEL_DIVIDER, 75 );

    this.splitPane.setDividerLocation( loc );

    messagePanel_.loadLayoutProperties();
  }

  public void
  saveLayoutProperties() {
    Configuration.saveDividerLocation( Configuration.P_MAIN_PANEL_DIVIDER, 
                                       this.splitPane.getDividerLocation() );

    messagePanel_.saveLayoutProperties();
  }

  private void
  establishContents() {
    setLayout( new GridBagLayout() );

    int row = 0;
    int col = 0;

    this.toolBar = new JToolBar();
    this.toolBar.setFloatable( false );
    AWTUtilities.constrain( this, this.toolBar, GridBagConstraints.HORIZONTAL,
                            GridBagConstraints.WEST,
      col++, row, 1, 1, 1.0, 0.0 );

    JPanel pan = new JPanel();
    AWTUtilities.constrain( this, pan, GridBagConstraints.NONE,
                            GridBagConstraints.EAST, col++, row++, 1, 1, 0.0, 0.0 );

    messagePanel_ = new MessagePanel( this );

    treePanel_ = FolderTreePanel.getInstance();
    treePanel_.setMessagePanel( messagePanel_ );

  // NOTE
  // Populate after panels are created, since they
  // are referenced by actionListeners.
  //
    populateToolbar( this.toolBar );

    this.splitPane = new JSplitPane( JSplitPane.HORIZONTAL_SPLIT,
                                     treePanel_, messagePanel_ );
    
    this.splitPane.setContinuousLayout( true );
    this.splitPane.setDividerSize( 3 );

    AWTUtilities.constrain( this, this.splitPane, GridBagConstraints.BOTH,
                            GridBagConstraints.CENTER, 0, row++, col, 1, 1.0, 1.0 );

  // create the status panel for displaying folder names, number of messages, etc.
    JPanel statusPan = new JPanel();
    statusPan.setLayout( new GridBagLayout() );

    AWTUtilities.constrain( this, statusPan, GridBagConstraints.HORIZONTAL,
                            GridBagConstraints.SOUTHWEST, 0, row++, col, 1, 1.0, 0.0 );

    col = 0;

    this.statusText = new JTextField();
    this.statusText.setEditable( false );

    AWTUtilities.constrain( statusPan, this.statusText, GridBagConstraints.HORIZONTAL,
                            GridBagConstraints.SOUTHWEST, col++, 0, 1, 1, 0.7, 0.0 );

    this.folderNameText = new JTextField();
    this.folderNameText.setEditable( false );

    AWTUtilities.constrain( statusPan, this.folderNameText, GridBagConstraints.HORIZONTAL,
                            GridBagConstraints.SOUTHWEST, col++, 0, 1, 1, 0.15, 0.0 );

    this.msgNumText = new JTextField();
    this.msgNumText.setEditable( false );

    AWTUtilities.constrain( statusPan, this.msgNumText, GridBagConstraints.HORIZONTAL,
                            GridBagConstraints.SOUTHWEST, col++, 0, 1, 1, 0.075, 0.0 );

    this.numMsgsText = new JTextField();
    this.numMsgsText.setEditable( false );

    AWTUtilities.constrain( statusPan, this.numMsgsText, GridBagConstraints.HORIZONTAL,
                            GridBagConstraints.SOUTHWEST, col++, 0, 1, 1, 0.075, 0.0 );
  }

  private void
  populateToolbar( JToolBar toolBar ) {
    try {
      Image iNotifyOn =
        AWTUtilities.getImageResource( "/org/icemail/mail/images/notifyon.gif" );

      Image iNotifyOff =
        AWTUtilities.getImageResource( "/org/icemail/mail/images/notifyoff.gif" );

      ImageIcon[] icons = new ImageIcon[2];
      icons[0] = new ImageIcon( iNotifyOff );
      icons[1] = new ImageIcon( iNotifyOn );
      MailEventThread.getInstance().setNotifyIcons( icons );
    } catch ( IOException ex ) {
    }
    IActionListener xlistener = new IActionListener();

    JButton xbutton =
      ComponentFactory.getButton( ICEMail.getBundle(), "MainPanel.GetMail",
                                  xlistener, null );

    MailEventThread.getInstance().setNotifyButton( xbutton );
    toolBar.add( xbutton );  

    toolBar.addSeparator();

    xbutton = ComponentFactory.getButton( ICEMail.getBundle(), "MainPanel.CreateFolder",
                                          xlistener, null );
    toolBar.add( xbutton );

    toolBar.addSeparator();

    xbutton = ComponentFactory.getButton( ICEMail.getBundle(), "MainPanel.ComposeMsg",
                                          xlistener, null );
    toolBar.add( xbutton );

    toolBar.addSeparator();

    xbutton = ComponentFactory.getButton( ICEMail.getBundle(), "MainPanel.ReplyMsg",
                                          xlistener, null );
    toolBar.add( xbutton );

    xbutton = ComponentFactory.getButton( ICEMail.getBundle(), "MainPanel.ReplyAllMsg",
                                          xlistener, null );
    toolBar.add( xbutton );

    xbutton = ComponentFactory.getButton( ICEMail.getBundle(), "MainPanel.ForwardMsg",
                                          xlistener, null );
    toolBar.add( xbutton );

    toolBar.addSeparator();

    xbutton = ComponentFactory.getButton( ICEMail.getBundle(), "MainPanel.PrintMsg",
                                          xlistener, null );
    toolBar.add( xbutton );

    toolBar.addSeparator();
    toolBar.addSeparator();

    xbutton = ComponentFactory.getButton( ICEMail.getBundle(), "MainPanel.CopyMsg",
                                          xlistener, null );
    toolBar.add( xbutton );

    xbutton = ComponentFactory.getButton( ICEMail.getBundle(), "MainPanel.MoveMsg",
                                          xlistener, null );
    toolBar.add( xbutton );
/*
    Icon moveIcon = new ImageIcon( iMove );
    Icon arwIcon = new ImageIcon( iMoveArw );

    PopDownButton moveButton =
      new PopDownButton( moveIcon, arwIcon, "moveBtnPopup" );

    moveButton.setActionCommand( "MOVEMSG" );
    moveButton.addActionListener( treePanel_ );
    moveButton.setToolTipText( "Move" );

    toolBar.add( moveButton );
*/
    toolBar.addSeparator();
    toolBar.addSeparator();

    xbutton = ComponentFactory.getButton( ICEMail.getBundle(), "MainPanel.DeleteMsg",
                                          xlistener, null );
    toolBar.add( xbutton );

    toolBar.addSeparator();
    toolBar.addSeparator();

    xbutton = ComponentFactory.getButton( ICEMail.getBundle(), "MainPanel.PreviousMsg",
                                          xlistener, null );
    toolBar.add( xbutton );

    xbutton = ComponentFactory.getButton( ICEMail.getBundle(), "MainPanel.NextMsg",
                                          xlistener, null );
    toolBar.add( xbutton );

    toolBar.addSeparator();
    toolBar.addSeparator();

    toolBar.add( messagePanel_.getSignedAction() );

    toolBar.add( messagePanel_.getEnvelopedAction() );
  }

//............................................................

  public void
  showStatusMessage( String message ) {
    this.statusText.setText( message );
  }

  public void
  setCurrentFolderName( String folderName ) {
    this.folderNameText.setText( folderName );
  }

  public void
  setNumFolderMessages( int numMsgs ) {
    this.numMsgsText.setText( "" + numMsgs );
  }

  public void
  setCurrentMessageNum( int msgNum ) {
    this.msgNumText.setText( "" + msgNum );
  }

//............................................................

  public void
  distribute( ActionEvent event ) {
    if ( Package.DEBUG && Package.isTraceable( "MainPanel" ) ) {
      System.out.println( "MainPanel.distribute(ae): " + event );
    }

    treePanel_.distribute( event );
    messagePanel_.distribute( event );
  }

//............................................................

  private class IActionListener
    implements ActionListener
  {
    /**
     * Invoked when an action occurs.
     * <p>
     * Implementation of java.awt.event.ActionListener.actionPerformed()
     *
     * @param event the action event that occured
     */
    public void
    actionPerformed( ActionEvent event ) {
      distribute( event );
    }
  }

}