connectivityhelper.cpp Example File

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 #include "connectivityhelper.h"

 #include <QMessageBox>
 #include <QWidget>
 #include <QTimer>

 ConnectivityHelper::ConnectivityHelper(QNetworkSession *session, QWidget *parent) : QObject(parent),
         m_session(session)
 {
     connect(m_session,
             SIGNAL(error(QNetworkSession::SessionError)),
             this,
             SLOT(error(QNetworkSession::SessionError)));
 }

 void ConnectivityHelper::error(QNetworkSession::SessionError error)
 {
     if (error == QNetworkSession::UnknownSessionError) {
         if (m_session->state() == QNetworkSession::Connecting) {
             QMessageBox msgBox(qobject_cast<QWidget *>(parent()));
             msgBox.setText("This application requires network access to function.");
             msgBox.setInformativeText("Press Cancel to quit the application.");
             msgBox.setIcon(QMessageBox::Information);
             msgBox.setStandardButtons(QMessageBox::Retry | QMessageBox::Cancel);
             msgBox.setDefaultButton(QMessageBox::Retry);
             int ret = msgBox.exec();
             if (ret == QMessageBox::Retry) {
                 QTimer::singleShot(0, m_session, SLOT(open()));
             } else if (ret == QMessageBox::Cancel) {
                 emit networkingCancelled();
             }
         }
     } else if (error == QNetworkSession::SessionAbortedError) {
         QMessageBox msgBox(qobject_cast<QWidget *>(parent()));
         msgBox.setText("Out of range of network.");
         msgBox.setInformativeText("Move back into range and press Retry, or press Cancel to quit the application.");
         msgBox.setIcon(QMessageBox::Warning);
         msgBox.setStandardButtons(QMessageBox::Retry | QMessageBox::Cancel);
         msgBox.setDefaultButton(QMessageBox::Retry);
         int ret = msgBox.exec();
         if (ret == QMessageBox::Retry) {
             QTimer::singleShot(0, m_session, SLOT(open()));
         } else if (ret == QMessageBox::Cancel) {
             emit networkingCancelled();
         }
     }
 }