Java tutorial
/* * Copyright 2008 Jeff Dwyer * * Licensed 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 com.apress.progwt.client.college.gui; import com.allen_sauer.gwt.log.client.Log; import com.apress.progwt.client.Interactive; import com.google.gwt.user.client.Timer; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.ClickListener; import com.google.gwt.user.client.ui.DecoratedTabPanel; import com.google.gwt.user.client.ui.DialogBox; import com.google.gwt.user.client.ui.FormHandler; import com.google.gwt.user.client.ui.FormPanel; import com.google.gwt.user.client.ui.FormSubmitCompleteEvent; import com.google.gwt.user.client.ui.FormSubmitEvent; import com.google.gwt.user.client.ui.HorizontalPanel; import com.google.gwt.user.client.ui.KeyboardListener; import com.google.gwt.user.client.ui.KeyboardListenerAdapter; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.PasswordTextBox; import com.google.gwt.user.client.ui.PopupListener; import com.google.gwt.user.client.ui.PopupPanel; import com.google.gwt.user.client.ui.TextBox; import com.google.gwt.user.client.ui.VerticalPanel; import com.google.gwt.user.client.ui.Widget; public class LoginWindow extends DialogBox { private static final String SECURITY_URL = "j_acegi_security_check?gwt=true"; private FormPanel form; private Label messageLabel; private LoginListener listener; private TextBox username; /** * this has the secureTargetURL which is a way for us to get to the * right page even after a reloaction to OpenID login. */ private String secureTargetURL; private static boolean semaphore = false; private static String lastNameEntered = ""; /** * Prevents multiple instances with a semaphore. * * @param ConstHolder.myConstants - * NOTE: this is used by both AddLink & Hippo modules, so * we can't rely on Manager.ConstHolder.myConstants being * initialized. * * @param manager */ public LoginWindow(LoginListener listener, String secureTargetURL) { super(false, false); this.secureTargetURL = secureTargetURL; this.listener = listener; if (semaphore == false) { Log.debug("CREATING LoginWindow"); semaphore = true; } else { Log.debug("KILLING LoginWindow"); hide(); return; } setText("Please Login"); setupForm(); addPopupListener(new PopupListener() { public void onPopupClosed(PopupPanel sender, boolean autoClosed) { semaphore = false; } }); setWidget(form); setStyleName("TC-Popup"); } private void setupForm() { form = new FormPanel(); form.setAction(Interactive.getRelativeURL(SECURITY_URL)); form.setMethod(FormPanel.METHOD_POST); // Create a panel to hold all of the form widgets. VerticalPanel panel = new VerticalPanel(); DecoratedTabPanel tabs = new DecoratedTabPanel(); tabs.add(getOpenIDTab(), "OpenID"); tabs.add(getUPTab(), "Username/Password"); tabs.selectTab(1); panel.add(tabs); messageLabel = new Label(""); panel.add(messageLabel); form.addFormHandler(new FormHandler() { // note, this doesn't need to be perfectly secure. We just // want to know that we think we're secure. The next request // will tell us for sure public void onSubmitComplete(FormSubmitCompleteEvent event) { Log.debug("submit event results " + event.getResults()); if (event.getResults().equals("OK")) { success(); } else { Log.warn("Login Fail: " + event.getResults()); failure(); } // // TODO parse bad password etc. Super-Fragile string // comps // if (event.getResults() == null // || -1 != event.getResults().indexOf( // "not successful") // || -1 != event.getResults().indexOf( // "Bad credentials") // || -1 != event.getResults().indexOf("404")) { // Log.warn("Login Fail: " + event.getResults()); // failure(); // } else { // Log.info("Login Success"); // Log.debug(event.getResults()); // success(); // } } public void onSubmit(FormSubmitEvent event) { Log.debug("submit to " + form.getAction()); // This event is fired just before the form is submitted. // We can take // this opportunity to perform validation. // if (username.getText().length() == 0) { // AlertDialog.alert("Username cannot be empty"); // event.setCancelled(true); // } // if (password.getText().length() == 0) { // AlertDialog.alert("Password cannot be empty"); // event.setCancelled(true); // } lastNameEntered = username.getText(); } }); form.setWidget(panel); } private Widget getUPTab() { VerticalPanel uptab = new VerticalPanel(); username = new TextBox(); username.setName("j_username"); username.setText(lastNameEntered); KeyboardListener enterListener = new KeyboardListenerAdapter() { public void onKeyPress(Widget sender, char keyCode, int modifiers) { if (keyCode == KEY_ENTER) { form.submit(); } } }; final PasswordTextBox password = new PasswordTextBox(); password.setName("j_password"); password.addKeyboardListener(enterListener); username.setText("test"); password.setText("testaroo"); HorizontalPanel userP = new HorizontalPanel(); userP.add(new Label("Username")); userP.add(username); HorizontalPanel passPanel = new HorizontalPanel(); passPanel.add(new Label("Password")); passPanel.add(password); uptab.add(userP); uptab.add(passPanel); uptab.add(new Button("Login", new ClickListener() { public void onClick(Widget sender) { form.submit(); } })); return uptab; } private Widget getOpenIDTab() { HorizontalPanel hP = new HorizontalPanel(); hP.add(new ExternalLink("Do OpenID login", secureTargetURL, true)); return hP; } private void failure() { // messageLabel.setText(ConstHolder.myConstants.login_failure()); messageLabel.setText("Failure"); } private void success() { // messageLabel.setText(ConstHolder.myConstants.login_success()); messageLabel.setText("Success"); listener.loginSuccess(); Timer t = new Timer() { public void run() { // free up the login lock for next time semaphore = false; hide(); } }; t.schedule(2000); } }