001 // This file is part of the Attempto Java Packages. 002 // Copyright 2008, Attempto Group, University of Zurich (see http://attempto.ifi.uzh.ch). 003 // 004 // The Attempto Java Packages is free software: you can redistribute it and/or modify it under the 005 // terms of the GNU Lesser General Public License as published by the Free Software Foundation, 006 // either version 3 of the License, or (at your option) any later version. 007 // 008 // The Attempto Java Packages is distributed in the hope that it will be useful, but WITHOUT ANY 009 // WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 010 // PURPOSE. See the GNU Lesser General Public License for more details. 011 // 012 // You should have received a copy of the GNU Lesser General Public License along with the Attempto 013 // Java Packages. If not, see http://www.gnu.org/licenses/. 014 015 package ch.uzh.ifi.attempto.acewiki.gui.page; 016 017 import nextapp.echo2.app.Column; 018 import nextapp.echo2.app.Extent; 019 import nextapp.echo2.app.Font; 020 import nextapp.echo2.app.Grid; 021 import nextapp.echo2.app.Insets; 022 import nextapp.echo2.app.Row; 023 import nextapp.echo2.app.Window; 024 import nextapp.echo2.app.event.ActionEvent; 025 import nextapp.echo2.app.event.ActionListener; 026 import ch.uzh.ifi.attempto.acewiki.Wiki; 027 import ch.uzh.ifi.attempto.acewiki.gui.Title; 028 import ch.uzh.ifi.attempto.echocomp.GeneralButton; 029 import ch.uzh.ifi.attempto.echocomp.MessageWindow; 030 import ch.uzh.ifi.attempto.echocomp.PasswordField; 031 import ch.uzh.ifi.attempto.echocomp.SolidLabel; 032 import ch.uzh.ifi.attempto.echocomp.TextField; 033 import ch.uzh.ifi.attempto.echocomp.VSpace; 034 035 /** 036 * This class represents a page where the users can login. Note that the login feature 037 * is implemented only very rudimentary at the moment. The password is always "password". 038 * 039 * @author Tobias Kuhn 040 */ 041 public class LoginScreen extends Column implements ActionListener { 042 043 private static final long serialVersionUID = -6704597832001286479L; 044 045 private Wiki wiki; 046 private Window window; 047 048 private TextField usernameField = new TextField(); 049 private PasswordField passwordField = new PasswordField(); 050 051 /** 052 * Creates a new login screen. 053 * 054 * @param wiki The wiki instance. 055 * @param window The window in which the login screen is shown. 056 */ 057 public LoginScreen(Wiki wiki, Window window) { 058 this.wiki = wiki; 059 this.window = window; 060 061 wiki.log("logi", "login page"); 062 063 add(new VSpace(20)); 064 add(new Title("AceWiki Login", true)); 065 add(new VSpace(20)); 066 067 Grid grid = new Grid(2); 068 grid.setInsets(new Insets(10, 5, 0, 0)); 069 grid.add(new SolidLabel("username:", Font.ITALIC)); 070 usernameField.setWidth(new Extent(100)); 071 grid.add(usernameField); 072 grid.add(new SolidLabel("password:", Font.ITALIC)); 073 passwordField.setWidth(new Extent(100)); 074 grid.add(passwordField); 075 add(grid); 076 077 add(new VSpace(20)); 078 079 Row r3 = new Row(); 080 r3.setInsets(new Insets(10, 0)); 081 r3.setCellSpacing(new Extent(5)); 082 r3.add(new GeneralButton("Login", this)); 083 add(r3); 084 } 085 086 public void actionPerformed(ActionEvent e) { 087 wiki.log("logi", "pressed: login"); 088 String username = usernameField.getText(); 089 String password = passwordField.getText(); 090 String correctPassword = getPassword(username); 091 if (password.equals(correctPassword)) { 092 wiki.log("logi", "correct password for " + username); 093 wiki.setUsername(username); 094 wiki.log("syst", "login"); 095 window.setContent(wiki.getContentPane()); 096 } else { 097 wiki.log("logi", "incorrect password: " + username); 098 window.getContent().add(new MessageWindow("Error", "Invalid username or password!", "OK")); 099 } 100 } 101 102 private String getPassword(String username) { 103 // Put your code here that returns the password for the given username! 104 return "password"; 105 } 106 107 }