Qt 4.8: googlechat.cpp Example File (webkit/googlechat/googlechat.cpp)

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# googlechat.cpp Example File

webkit/googlechat/googlechat.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions 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.
     **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
     **     of its contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
     **
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #include <QtGui>
     #include <QtWebKit>
     #include <QSslSocket>

     #include "googlechat.h"

     #define GOOGLECHAT_URL "http://talkgadget.google.com/talkgadget/m"

     GoogleChat::GoogleChat(): QWidget() {
         form.setupUi(this);
         setFixedSize(320, 480);

         form.userNameEdit->setFocus();
         connect(form.userNameEdit, SIGNAL(textChanged(QString)), SLOT(adjustLoginButton()));
         connect(form.userNameEdit, SIGNAL(returnPressed()), SLOT(inputPassword()));

         connect(form.passwordEdit, SIGNAL(textChanged(QString)), SLOT(adjustLoginButton()));
         connect(form.passwordEdit, SIGNAL(returnPressed()), SLOT(doLogin()));

         form.loginButton->setEnabled(false);
         connect(form.loginButton, SIGNAL(clicked()), SLOT(doLogin()));

         connect(form.webView, SIGNAL(loadFinished(bool)), SLOT(initialPage(bool)));
         connect(form.webView, SIGNAL(loadProgress(int)),
                 form.progressBar, SLOT(setValue(int)));
         form.webView->setUrl((QUrl(GOOGLECHAT_URL)));
         form.webView->setContextMenuPolicy(Qt::PreventContextMenu);

         showStatus("Wait...");
     }

     void GoogleChat::showStatus(const QString &msg) {
         form.statusLabel->setText(msg);
         form.stackedWidget->setCurrentIndex(0);
     }

     void GoogleChat::showError(const QString &msg) {
         form.progressBar->hide();
         showStatus(QString("Error: %1").arg(msg));
     }

     QWebElement GoogleChat::document() const {
         return form.webView->page()->mainFrame()->documentElement();
     }

     void GoogleChat::adjustLoginButton() {
         userName = form.userNameEdit->text();
         password = form.passwordEdit->text();
         bool ok = !userName.isEmpty() && !password.isEmpty();
         form.loginButton->setEnabled(ok);
     }

     void GoogleChat::inputPassword() {
         if (!form.userNameEdit->text().isEmpty())
             form.passwordEdit->setFocus();
     }

     void GoogleChat::doLogin() {
         userName = form.userNameEdit->text();
         password = form.passwordEdit->text();
         bool ok = !userName.isEmpty() && !password.isEmpty();
         if (!ok)
             return;

         form.progressBar->setValue(0);
         form.progressBar->show();
         connect(form.webView, SIGNAL(loadFinished(bool)), SLOT(loginPage(bool)));
         connect(form.webView, SIGNAL(loadProgress(int)),
                 form.progressBar, SLOT(setValue(int)));
         showStatus("Logging in...");

         QString userEmail = userName + "@gmail.com";

         document().findFirst("#Email").setAttribute("value", userEmail);
         document().findFirst("#Passwd").setAttribute("value", password);
         document().findFirst("#gaia_loginform").evaluateJavaScript("this.submit();");

     }

     void GoogleChat::initialPage(bool ok) {
         if (!QSslSocket::supportsSsl()) {
             showError("This example requires SSL support.");
             return;
         }

         if (ok) {
             QWebElement email = document().findFirst("#Email");
             QWebElement passwd = document().findFirst("#Passwd");
             QWebElement loginForm = document().findFirst("#gaia_loginform");
             if (!email.isNull() && !passwd.isNull() && !loginForm.isNull()) {
                 form.stackedWidget->setCurrentIndex(1);
                 form.userNameEdit->setFocus();
                 form.webView->disconnect();
                 return;
             }
         }

         showError("SERVICE unavailable.");
     }

     void GoogleChat::hideElements()
     {
         document().findFirst(".footer-footer").removeFromDocument();
         document().findFirst(".title-bar-bg .title-bar").removeFromDocument();
         QTimer::singleShot(2000, this, SLOT(hideElements()));
     }

     void GoogleChat::loginPage(bool ok) {
         QString location = form.webView->url().toString();
         if (!ok) {
             if (location.indexOf("CheckCookie"))
                 return;
             showError("Service unavailable");
         } else {
             // check for any error message

             QWebElement  e = document().findFirst(".errormsg");
             if (e.isNull()) {
                 form.stackedWidget->setCurrentIndex(2);
                 QTimer::singleShot(500, this, SLOT(hideElements()));
                 return;
             }

            QString err = "Unknown login failure.";
            const QString errorMessage = e.toPlainText();
             if (!errorMessage.isEmpty()) {
                 err = errorMessage;
                 err = err.simplified();
             }
             showError(err);
         }
     }