propertiesdialog.java

一个用java写的mail.里面的代码值得我们去研究！学习。

/*
** $Id: PropertiesDialog.java,v 1.4 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.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Font;
import java.awt.Frame;
import java.awt.Insets;
import java.awt.Point;

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

import javax.mail.Part;
import javax.mail.MessagingException;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

import javax.swing.border.EmptyBorder;

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


/**
 * A dialog which displays that attribrutes of a part as strings.
 * NOTE: Messages are also parts in the JavaMail hierachy.
 */
public class PropertiesDialog
  extends JDialog
{
  /**
   * Construct a dialog for displaying the given part's attribrutes.
   *
   * @param parent parent frame to return to after disposed
   * @param part the part from which to obtain the attributes
   */
  public
  PropertiesDialog( Frame parent, Part part, boolean recurse ) {
    super( parent, true );

    establishContents( part, recurse );
    pack();

    Dimension sz = getPreferredSize();
    sz.width = UserProperties.getProperty( "propertiesDialog.width", sz.width );
    sz.height = UserProperties.getProperty( "propertiesDialog.height", sz.height );

    Point location = AWTUtilities.computeDialogLocation( this, sz.width, sz.height );

    setSize( sz );
    setLocation( location );
  }

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

  private void
  establishContents( Part part, boolean recurse ) {
  // create the contents of the text area from the contents of the part
    StringBuffer xbuffer = new StringBuffer( 256 );
    try {
    MessageUtilities.getPartDescription( part, xbuffer, "", recurse );
    } catch ( MessagingException xex ) {
      xbuffer.append( "MessagingException: " + xex );
    }

  // establish the contents of the dialog
    setTitle( ICEMail.getBundle().getString( "Properties.Title" ) );

    Container xcontentpane = getContentPane();
    xcontentpane.setLayout( new BorderLayout() );

    JPanel xpanel = new JPanel();
    xpanel.setLayout( new GridBagLayout() );
    xpanel.setBorder( new EmptyBorder( 3, 3, 3, 3 ) );
    xcontentpane.add( BorderLayout.CENTER, xpanel );

    JLabel xlabel;
    xlabel = ComponentFactory.getLabel( ICEMail.getBundle(), "Properties" );
    AWTUtilities.constrain( xpanel, xlabel, GridBagConstraints.NONE,
                            GridBagConstraints.NORTH, 0, 0, 1, 1, 0.0, 1.0,
                            new Insets( 8, 8, 8, 8 ) );

    JTextArea xtextarea = new JTextArea( xbuffer.toString() );
    xtextarea.setEditable( false );
    xtextarea.setFont( UserProperties.getFont( "propertiesDialog.font",
                                               new Font( "Dialog", Font.BOLD, 12 ) ) );

    JScrollPane scroller = new JScrollPane( xtextarea );
    scroller.setVerticalScrollBarPolicy( JScrollPane.VERTICAL_SCROLLBAR_ALWAYS );

    AWTUtilities.constrain( xpanel, scroller, GridBagConstraints.BOTH,
                            GridBagConstraints.NORTH, 1, 0, 1, 1, 1.0, 1.0 );

    JButton btn;
    btn = ComponentFactory.getButton( ICEMail.getBundle(), "Properties",
                                      new IActionListener(), null );
    AWTUtilities.constrain( xpanel, btn, GridBagConstraints.NONE,
                            GridBagConstraints.EAST, 0, 1, 2, 1, 1.0, 0.0,
                            new Insets( 12, 8, 8, 8 ) );
  }

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

  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.compareTo( "OK" ) == 0 ) {
      }
      dispose();
    }
  }

}