messagepanel.java

一个用java写的mail.里面的代码值得我们去研究！学习。

        xstate = ComposeFrame.EDITING;
      }

      Message msg = ( (xstate == ComposeFrame.CREATING) ? null : model_.getMessage( idx ) );

      String xselection = viewer_.getTextSelection();
      if ( xselection != null && xselection.length() == 0 ) {
        xselection = null;
      }

      ComposeFrame xcomposeframe = ComposeMgr.getInstance().getComposeFrame();
      xcomposeframe.editMessage( xstate, msg, xselection );
    }

    MainFrame.getInstance().resetCursor();
  }

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

  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 ) {
      String command = event.getActionCommand();

      if ( command.equals( "CUT" )   || command.equals( "COPY" ) ||
           command.equals( "PASTE" ) || command.equals( "UNDO" ) ) {
        viewer_.distribute( event );
      } else if ( command.equals( "EXPUNGE" ) ) {
        expungeDeletedMessages();
      } else if ( command.equals( "DELETEMSG" ) ) {
        deleteSelectedMessages();
      } else if ( command.equals( "NEXTHTML" ) || command.equals( "PREVHTML" ) ||
                  command.equals( "STOPHTML" ) ) {
        viewer_.distribute( event );
      } else if ( command.equals( "GETNEWMAIL" ) ) {
        getNewMail();
      } else  if ( command.equals( "NEXTMSG" ) ) {
        moveSelectedMessage( 1 );
      } else  if ( command.equals( "PREVMSG" ) ) {
        moveSelectedMessage( -1 );
      } else  if ( command.equals( "PRINTMSG" ) ) {
        printSelectedMessages();
      } else  if ( command.equals( "BROWSESEL" ) ) {
        String selStr = viewer_.getTextSelection();
        if ( selStr != null && selStr.length() > 0 ) {
          HotJavaMailBrowser.setBrowserDocumentString( selStr );
        }
      } else if ( command.startsWith( "REPLY" ) || command.startsWith( "FORWARD" ) ||
                  command.startsWith( "COMPOSE" ) || command.startsWith( "EDIT" ) ) {
        composeMessage( command );
      } else  if ( command.equals( "PROPS" ) ) {
        showMessageProperties();
      } else  if ( command.equals( "DUMPTOFILE" ) ) {
        dumpSelectedMessages();
      } else if ( command.equals( "TOGGLEHDRS" ) ) {
        JCheckBoxMenuItem xmenuitem = (JCheckBoxMenuItem)event.getSource();
        viewer_.setFullHeaders( xmenuitem.getState() );
      } else if ( command.equals( "TOGGLESMIME" ) ) {
        JCheckBoxMenuItem xmenuitem = (JCheckBoxMenuItem)event.getSource();
        viewer_.setParseSMimeMessages( xmenuitem.getState() );
      } else {
      // distribute to the sub-panels
      }
    }
  }

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

  private class ITableCellRenderer
    extends DefaultTableCellRenderer
  {
    private DateFormat   dateFmt;
  
    public
    ITableCellRenderer() {
      super();

      if ( Package.DEBUG && Package.isTraceable( "MessagePanel" ) ) {
        System.err.println( "MessagePanel.ITableCellRenderer()" );
      }

      dateFmt = DateFormat.getDateTimeInstance( DateFormat.SHORT, DateFormat.MEDIUM,
                                                ICEMail.getLocale() );

//      String dateFmtProp =
//        UserProperties.getProperty
//          ( "folder.dateFormat",
//            "E yyMMdd hh:mm:ss a" );
//
//      this.dateFmt =
//        new SimpleDateFormat( dateFmtProp, ICEMail.getLocale() );
//
//      this.dateFmt.setTimeZone( TimeZone.getDefault() );
    }

    public Component
    getTableCellRendererComponent( JTable table, Object value,
                                   boolean isSelected, boolean hasFocus,
                                   int row, int column ) {
      Component result =
        super.getTableCellRendererComponent( table, value, isSelected, hasFocus, row, column );

      Flags f = model_.getMessageFlags( row );

      if ( f.contains( Flags.Flag.SEEN ) ) {
        setForeground( MessagePanel.OldMsgColor_ );
      } else {
        setForeground( MessagePanel.NewMsgColor_ );
      }

      if ( value instanceof Date ) {
        String dateStr = this.dateFmt.format( (Date) value );
        setText( dateStr );
        setIcon( null );
      } else if ( value instanceof String ) {
        setText( (String)value );
        setIcon( null );
      } else if ( value instanceof JLabel ) {
        setText( ((JLabel)value).getText() );
        setIcon( ((JLabel)value).getIcon() );
      }

      return this;
    }
  }

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

  private class IListSelectionListener
    implements ListSelectionListener
  {
    public void
    valueChanged( ListSelectionEvent event ) {
      if ( model_ != null && ! event.getValueIsAdjusting() ) {
        ListSelectionModel lm = (ListSelectionModel) event.getSource();

        int idx = lm.getMinSelectionIndex();

        if ( idx != -1 && idx < messageTable_.getRowCount() &&
             messageTable_.isRowSelected( idx ) ) {
          if ( idx != currentIndex_ ) {
            MainFrame.getInstance().setWaitCursor();

            statusBar_.setCurrentMessageNum( idx + 1 );

            model_.setMessageSeen( idx );
            Message msg = model_.getMessage( idx );
            viewer_.setMessage( msg );
            currentIndex_ = idx;

            MainFrame.getInstance().resetCursor();
          }
        }
      }
    }
  }

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

  private class IExpungeRunner
    implements  DialogRunnable
  {
    private Folder    exFolder;

    public
    IExpungeRunner( Folder folder ) {
      this.exFolder = folder;
    }

    public void
    run( JDialog dialog, JProgressBar progress ) {
      dialog.show();
      progress.setValue( 33 );

      try {
        MailEventThread.getInstance().notifyIncomingMail( this.exFolder, false );

      // close the folder, expunging deleted messages
        MailUtilities.setStoreConnected( exFolder.getStore() );

        synchronized ( exFolder ) {
          if ( exFolder.isOpen() ) {
            exFolder.close( true );
          }
        }
        progress.setValue( 66 );

        folder_ = null;
        setFolder( exFolder );
        progress.setValue( 95 );

        System.gc();
        progress.setValue( 100 );
      } catch ( MessagingException ex ) {
        Object[] xargs = new Object[1];
        xargs[0] = ex.getMessage();
        ComponentFactory.showDialog( ICEMail.getBundle(), "MessagePanel.ExpungeError",
                                     0, JOptionPane.ERROR_MESSAGE, xargs );
      }

      dialog.dispose();
    }
  }

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

  private class INewMailRunner
    implements  DialogRunnable
  {
    public
    INewMailRunner() {
    }

    public void
    run( JDialog dialog, JProgressBar progress ) {
      dialog.show();

      progress.setValue( 25 );

      try {
        MailUtilities.setFolderOpenAndReady( folder_, Folder.READ_WRITE );

        if ( folder_.hasNewMessages() ) {
          Folder f = folder_;
          progress.setValue( 50 );

        // close the folder
          MailUtilities.setStoreConnected( f.getStore() );

          synchronized ( f ) {
            if ( f.isOpen() ) {
              f.close( false );
            }
          }
          progress.setValue( 75 );

        // reset and get the folder contents again
          folder_ = null;
          setFolder( f );
          progress.setValue( 95 );

          System.gc();
          progress.setValue( 100 );
        } else {
          progress.setValue( 100 );
          int delay = UserProperties.getProperty( "retrieveDelayMillis", 500 );
          try {
            Thread.currentThread().sleep( delay );
          } catch ( InterruptedException ex ) {
          }
        }
      } catch ( MessagingException ex ) {
        Object[] xargs = new Object[1];
        xargs[0] = ex.getMessage();
        ComponentFactory.showDialog( ICEMail.getBundle(), "MessagePanel.RetrieveError",
                                     0, JOptionPane.ERROR_MESSAGE, xargs );
      }

      dialog.dispose();
    }
  }

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

  private class IMouseAdapter
    extends MouseAdapter
  {
    int      previousColumn_    = -1;
    boolean  previousAscending_ = false;

  // UNDONE This needs to be 'invokeLater'-ed.
    public void
    mouseClicked( MouseEvent evt ) {
      if ( Package.DEBUG && Package.isTraceable( "MessagePanel" ) ) {
        System.err.println( "MessagePanel.mouseClicked(): " + evt );
      }

      if ( evt.getClickCount() == 1 ) {
        boolean xascending = ( (evt.getModifiers() & InputEvent.SHIFT_MASK) == 0 );

        TableColumnModel xmodel = messageTable_.getColumnModel();

        int xindex = xmodel.getColumnIndexAtX( evt.getX() );

        int xcolumn = messageTable_.convertColumnIndexToModel( xindex );

        if ( xcolumn != -1 ) {
          if ( previousColumn_ == xcolumn ) {
            if ( Package.DEBUG && Debug_ > 0 ) {
              System.err.println( "MessagePanel.mouseClicked(): as-" + xascending +
                                  " pas-" + previousAscending_ );
            }
            xascending = (previousAscending_) ? false : true;
          }
          messageTable_.getSelectionModel().clearSelection();
          currentIndex_ = -1;

          Object[] xargs = { folder_.getName() };

          String msg =
            ICEMail.getBundle().getFormatString( "MessagePanel.Sorting", xargs );

          String title =
            ICEMail.getBundle().getString( "MessagePanel.Sorting.title" );

          DialogRunner runner = new DialogRunner(
              new ISortMailRunner( xcolumn, xascending ),
                                   (Frame)getTopLevelAncestor(), title, msg );

          runner.start();

          previousAscending_ = xascending;
          previousColumn_ = xcolumn;
        }
      }
    }
  }

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

  private class ISortMailRunner
    implements DialogRunnable
  {
    private int     sortColumn;
    private boolean sortAscend;

    public
    ISortMailRunner( int col, boolean asc ) {
      this.sortColumn = col;
      this.sortAscend = asc;
    }

    public void
    run( JDialog dialog, JProgressBar progress ) {
      dialog.show();

      MainFrame.getInstance().setWaitCursor();

      progress.setMaximum( 10 + (messageTable_.getRowCount() * 2) );

      progress.setValue( 5 );

      model_.cacheAllMessages( progress );

      progress.setValue( progress.getValue() + 5 );

      model_.sortOnColumn( progress, this.sortColumn, this.sortAscend );

      System.gc();

      progress.setValue( progress.getMaximum() );

      viewer_.setMessage( null );
      statusBar_.setCurrentMessageNum( 1 );
      showTableRow( 0 );
      if ( messageTable_.getRowCount() > 0 ) {
        messageTable_.setRowSelectionInterval( 0, 0 );
      }

      MainFrame.getInstance().resetCursor();

      dialog.dispose();
    }
  }

}