Qt 4.6: googlechat.cpp Example File (webkit/googlechat/googlechat.cpp)

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# googlechat.cpp Example File
webkit/googlechat/googlechat.cpp

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     #include <QtGui>
     #include <QtWebKit>

     #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));
     }

     QString GoogleChat::evalJS(const QString &js) {
         QWebFrame *frame = form.webView->page()->mainFrame();
         return frame->evaluateJavaScript(js).toString();
     }

     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";
         evalJS(QString("document.getElementById('Email').value = \"%1\";").arg(userEmail));
         evalJS(QString("document.getElementById('Passwd').value = \"%1\";").arg(password));
         evalJS("document.getElementById('gaia_loginform').submit();");
     }

     void GoogleChat::initialPage(bool ok) {
         if (ok) {
             QString s1 = evalJS("document.getElementById('Email').name");
             QString s2 = evalJS("document.getElementById('Passwd').name");
             QString s3 = evalJS("document.getElementById('gaia_loginform').id");
             if (s1 == "Email" && s2 == "Passwd" && s3 == "gaia_loginform") {
                 form.stackedWidget->setCurrentIndex(1);
                 form.webView->disconnect();
                 return;
             }
         }

         showError("SERVICE unavailable.");
     }

     void GoogleChat::hideElements()
     {
         evalJS("var e = document.getElementsByClassName('footer-footer')[0]; e.parentElement.removeChild(e)");
         evalJS("var e = document.getElementsByClassName('title-bar-bg title-bar')[0]; e.parentElement.removeChild(e)");
         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
             QString c = evalJS("document.getElementsByClassName('errormsg').length");
             if (c == "0") {
                 form.stackedWidget->setCurrentIndex(2);
                 QTimer::singleShot(500, this, SLOT(hideElements()));
                 return;
             }

             QString err = "Unknown login failure.";
             if (c == "1") {
                 err = evalJS("document.getElementsByClassName('errormsg')[0].textContent");
                 err = err.simplified();
             }
             showError(err);
         }
     }