/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.ace.webui.vaadin;
import java.util.Map;
import org.osgi.service.log.LogService;
import com.vaadin.event.FieldEvents;
import com.vaadin.event.FieldEvents.TextChangeEvent;
import com.vaadin.event.ShortcutAction.KeyCode;
import com.vaadin.ui.Alignment;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Label;
import com.vaadin.ui.PasswordField;
import com.vaadin.ui.TextField;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.Window;
import com.vaadin.ui.themes.Reindeer;
/**
* Provides a simple login dialog.
*/
public class LoginWindow extends Window {
/**
*
*/
public static interface LoginFunction {
boolean login(String name, String password);
}
private final LogService m_log;
private final LoginFunction m_loginFunction;
private final Label m_additionalInfo;
/**
* Creates a new {@link LoginWindow} instance.
*
* @param log
* the log service to use;
* @param loginFunction
* the login callback to use.
*/
public LoginWindow(LogService log, LoginFunction loginFunction) {
super("Apache ACE Login");
m_log = log;
m_loginFunction = loginFunction;
setResizable(false);
setClosable(false);
setModal(true);
setWidth("20em");
m_additionalInfo = new Label("");
m_additionalInfo.setImmediate(true);
m_additionalInfo.setStyleName("alert");
m_additionalInfo.setHeight("1.2em");
// Ensures the information message disappears when starting typing...
FieldEvents.TextChangeListener changeListener = new FieldEvents.TextChangeListener() {
@Override
public void textChange(TextChangeEvent event) {
m_additionalInfo.setValue("");
}
};
final TextField nameField = new TextField("Name", "");
nameField.addListener(changeListener);
nameField.setImmediate(true);
nameField.setWidth("100%");
final PasswordField passwordField = new PasswordField("Password", "");
passwordField.addListener(changeListener);
passwordField.setImmediate(true);
passwordField.setWidth("100%");
Button loginButton = new Button("Login");
loginButton.setImmediate(true);
// Allow enter to be used to login directly...
loginButton.setClickShortcut(KeyCode.ENTER);
// Highlight this button as the default one...
loginButton.addStyleName(Reindeer.BUTTON_DEFAULT);
loginButton.addListener(new Button.ClickListener() {
public void buttonClick(ClickEvent event) {
Button button = event.getButton();
button.setEnabled(false);
try {
String username = (String) nameField.getValue();
String password = (String) passwordField.getValue();
if (m_loginFunction.login(username, password)) {
m_log.log(LogService.LOG_INFO, "Apache Ace WebUI succesfull login by user: " + username);
closeWindow();
}
else {
m_log.log(LogService.LOG_WARNING, "Apache Ace WebUI invalid username or password entered.");
m_additionalInfo.setValue("Invalid username or password!");
nameField.focus();
nameField.selectAll();
}
}
finally {
button.setEnabled(true);
}
}
});
final VerticalLayout content = (VerticalLayout) getContent();
content.setSpacing(true);
content.setMargin(true);
content.setSizeFull();
content.addComponent(nameField);
content.addComponent(passwordField);
content.addComponent(m_additionalInfo);
content.addComponent(loginButton);
content.setComponentAlignment(loginButton, Alignment.BOTTOM_CENTER);
nameField.focus();
}
/**
* Shows this login window on screen.
*
* @param parent
* the parent window, cannot be <code>null</code>.
*/
public void openWindow(Window parent) {
parent.addParameterHandler(this);
parent.addWindow(this);
center();
}
/**
* Closes this login window.
*/
public void closeWindow() {
getParent().removeParameterHandler(this);
close();
}
@Override
public void handleParameters(Map<String, String[]> parameters) {
if (parameters.containsKey("sessionTimedOut")) {
m_additionalInfo.setValue("Session timed out!");
}
super.handleParameters(parameters);
}
}