storeconfigdialog.java

一个用java写的mail.里面的代码值得我们去研究！学习。

/*
** $Id: StoreConfigDialog.java,v 1.7 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.Container;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Frame;

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

import java.util.Vector;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.mail.Provider;
import javax.mail.URLName;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JDialog; 
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JScrollPane;
import javax.swing.JTextField;

import javax.swing.event.DocumentEvent; 
import javax.swing.event.DocumentListener; 
import javax.swing.event.ListSelectionEvent; 
import javax.swing.event.ListSelectionListener;

import javax.swing.border.EmptyBorder;

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


/**
 * A dialog which allows stores (URLs) to be created, modified and deleted.
 * The options are stored as part of the configuration properties. And if the
 * list of stores changes, the tree of stores is re-loaded.
 *
 * @see Configuration
 * @see FolderTreePanel
 */
public class StoreConfigDialog
  extends JDialog
{
  private static final String[] NAMESPC_COMBO_DEFAULT = { "", "#mh/%", "%" };

  private boolean        hasChanged_ = false;

  private JList          storeList_;

  private JTextField     nameField_;
  private JTextField     hostField_;
  private JTextField     userField_;
  private JPasswordField passField_;
  private JTextField     fileField_;

  private JTextField     urlField_;

  private JComboBox      nameSpaceCombo_;
  private JComboBox      providerCombo_;

  private Vector         providers_ = new Vector();


  /**
   * Construct a dialog for maintaining stores.
   *
   * @param parent parent frame to return to after disposed
   */
  public
  StoreConfigDialog( Frame parent ) {
    super( parent, true );
    
    establishContents();
    pack();

    Dimension sz = getSize();
    int w = UserProperties.getProperty( "storeConfigDialog.width", sz.width );
    int h = UserProperties.getProperty( "storeConfigDialog.height", sz.height );
    setSize( w, h );

    setLocation( AWTUtilities.computeDialogLocation( this ) );
  }

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

  private void
  removeStore() {
    String xstoreName = nameField_.getText();

    if ( xstoreName.length() < 1 ) {
      ComponentFactory.showDialog( ICEMail.getBundle(), "StoreConfig.DeleteError",
                                   0, JOptionPane.WARNING_MESSAGE, null );
    } else {
      Vector xnamelist =
        UserProperties.getStringVector( Configuration.P_STORE_LIST, new Vector() );

      if ( xnamelist.contains( xstoreName ) ) {
        xnamelist.removeElement( xstoreName );

        Configuration.getInstance().setStringArray( Configuration.P_STORE_LIST, xnamelist );

        Configuration.getInstance().removeProperty( Configuration.PP_STORE_URL + xstoreName );

        Configuration.getInstance().removeProperty( Configuration.PP_STORE_NMSPC + xstoreName );

        Configuration.getInstance().saveProperties();

        storeList_.setListData( xnamelist );
        storeList_.repaint( 100 );
        clearFields();

        hasChanged_ = true;
      }
    }
  }

  // NOTE that we have to store the *actual* password,
  //      not the "hidden" one with asterisks.
  private void
  saveStore() {
    String xstoreName = nameField_.getText();
    String xurlStr = getStoreURL( false );

    if ( xstoreName.length() < 1 || xurlStr.length() < 1 ) {
      ComponentFactory.showDialog( ICEMail.getBundle(), "StoreConfig.SaveError",
                                   0, JOptionPane.WARNING_MESSAGE, null );
    } else {
      Vector xnamelist = UserProperties.getStringVector( Configuration.P_STORE_LIST,
                                                        new Vector() );

      if ( ! xnamelist.contains( xstoreName ) ) {
        xnamelist.addElement( xstoreName );
        storeList_.setListData( xnamelist );
        Configuration.getInstance().setStringArray( Configuration.P_STORE_LIST, xnamelist );
      }

      Configuration.getInstance().setProperty( Configuration.PP_STORE_URL + xstoreName,
                                               xurlStr );

      String xnamespace = (String)nameSpaceCombo_.getSelectedItem();

      if ( xnamespace != null && xnamespace.length() > 0 ) {
        Configuration.getInstance().setProperty( Configuration.PP_STORE_NMSPC + xstoreName,
                                                 xnamespace );
      } else {
        Configuration.getInstance().removeProperty( Configuration.PP_STORE_NMSPC + xstoreName );
      }
      Configuration.getInstance().saveProperties();

      hasChanged_ = true;

      storeList_.setSelectedValue( xstoreName, true );
      storeList_.repaint( 100 );
    }
  }

  private void
  clearFields() {
    nameField_.setText( "" );
    hostField_.setText( "" );
    userField_.setText( "" );
    passField_.setText( "" );
    fileField_.setText( "" );
    urlField_.setText( "" );
    providerCombo_.setSelectedIndex( 0 );
    nameSpaceCombo_.setSelectedItem( "" );
    storeList_.getSelectionModel().clearSelection();
    nameField_.requestFocus();
    providerCombo_.repaint( 50 );
    nameSpaceCombo_.repaint( 50 );
  }

  /**
   *
   * @param hidePassword true if the password is all asterisks
   */
  private String
  getStoreURL( boolean hidePassword ) {
    int      xindex = providerCombo_.getSelectedIndex();
    Provider xprovider = (Provider)providers_.elementAt( xindex );
    String   prov = (String)xprovider.getProtocol();

    String   host = hostField_.getText();
    String   user = userField_.getText();

    char[] passCh = passField_.getPassword();
    if ( hidePassword ) {
      for ( int i = 0 ; i < passCh.length ; ++i ) {
        passCh[i] = '*';
      }
    }

    String pass = new String( passCh );
    String file = fileField_.getText();

    URLName url = new URLName( prov, host, -1, file, user, pass );
    return url.toString();
  }

  private void
  establishContents() {
    setTitle( ICEMail.getBundle().getString( "StoreConfig.Title" ) );

    Container cont = getContentPane();
    cont.setLayout( new GridBagLayout() );

    ActionListener xlistener = new IActionListener();

    int row = 0;

    JPanel listPan = new JPanel();
    listPan.setLayout( new GridBagLayout() );
    listPan.setBorder( new EmptyBorder( 4, 4, 4, 4 ) );
    AWTUtilities.constrain( cont, listPan, GridBagConstraints.BOTH,
                            GridBagConstraints.CENTER, 0, 0, 1, 2, 0.3, 1.0 );

    String[] nameList = UserProperties.getStringArray( Configuration.P_STORE_LIST, null );

    if ( nameList == null )
      storeList_ = new JList();