signonui.java

这个范例程序演示了利用j2me技术开发无线服务器支持的应用。这是一个电影票订购程序

/*
 * Copyright 2001, 2002, 2003 Sun Microsystems, Inc. All Rights Reserved.
 * Except for any files in PNG format (which are marked with the filename
 * extension ".png"), GIF format (which are marked with the filename
 * extension ".gif"), or JPEG format (which are marked with the filename
 * extension ".jpg"), redistribution and use in source and binary forms,
 * with or without modification, are permitted provided that the
 * following conditions are met:
 * - Redistribution of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * - Redistribution in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * You may compile, use, perform and display the following files with
 * original Java Smart Ticket Sample Application code obtained from Sun
 * Microsystems, Inc. only:
 * - files in PNG format and having the ".png" extension
 * - files in GIF format and having the ".gif" extension
 * - files in JPEG format and having the ".jpg" extension
 * You may not modify or redistribute .png, .gif, or .jpg files in any
 * form, in whole or in part, by any means without prior written
 * authorization from Sun Microsystems, Inc. and its licensors, if any.
 * Neither the name of Sun Microsystems, Inc., the 'Java Smart Ticket
 * Sample Application', 'Java', 'Java'-based names, or the names of
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
 * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
 * MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
 * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
 * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
 * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
 * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
 * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * You acknowledge that this software is not designed, licensed or
 * intended for use in the design, construction, operation or maintenance
 * of any nuclear facility.
 * $Id: SignOnUI.java,v 1.2 2003/04/09 21:33:36 ro89390 Exp $
 */
package com.sun.j2me.blueprints.smartticket.client.midp.ui;

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

public class SignOnUI extends Form implements CommandListener {

    /**
     * The runnable to execute if the sign-on succeeds.
     */
    private Runnable authorizedRunnable;
    private UIController uiController;
    private TextField userNameField;
    private TextField passwordField;
    private Command signOnCommand;

    public SignOnUI(UIController uiController) {
        super(    // uiController.getString(UIMessageCodes.SIGN_IN)
        "Sign In");

        this.uiController = uiController;
        userNameField = 
            new TextField(    // uiController.getString(UIMessageCodes.LOGIN),
        "Login:", null, 12, TextField.ANY);
        passwordField = 
            new TextField(    // uiController.getString(UIMessageCodes.PASSWORD),
        "Password:", null, 20, TextField.PASSWORD);
        signOnCommand = 
            new Command(      // uiController.getString(UIMessageCodes.SIGN_IN),
        "Signing in...", Command.OK, 5);

        append(userNameField);
        append(passwordField);
        addCommand(signOnCommand);
        setCommandListener(this);
    }

    public void init(Runnable authorizedRunnable) {
        this.authorizedRunnable = authorizedRunnable;

        userNameField.setString(null);
        passwordField.setString(null);
    } 

    public void commandAction(Command command, Displayable displayable) {
        uiController.signOn(authorizedRunnable, userNameField.getString(), 
                            passwordField.getString());
    } 

}