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# sessionwidget.cpp Example File

network/bearermonitor/sessionwidget.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** 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 The Qt Company Ltd 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
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     #include "sessionwidget.h"
     #include "qnetworkconfigmanager.h"

     SessionWidget::SessionWidget(const QNetworkConfiguration &config, QWidget *parent)
     :   QWidget(parent), statsTimer(-1)
     {
         setupUi(this);

     #ifdef QT_NO_NETWORKINTERFACE
         interfaceName->setVisible(false);
         interfaceNameLabel->setVisible(false);
         interfaceGuid->setVisible(false);
         interfaceGuidLabel->setVisible(false);
     #endif

         session = new QNetworkSession(config, this);

         connect(session, SIGNAL(stateChanged(QNetworkSession::State)),
                 this, SLOT(updateSession()));
         connect(session, SIGNAL(error(QNetworkSession::SessionError)),
                 this, SLOT(updateSessionError(QNetworkSession::SessionError)));

         updateSession();

         sessionId->setText(QString("0x%1").arg(qulonglong(session), 8, 16, QChar('0')));

         configuration->setText(session->configuration().name());

         connect(openSessionButton, SIGNAL(clicked()),
                 this, SLOT(openSession()));
         connect(openSyncSessionButton, SIGNAL(clicked()),
                 this, SLOT(openSyncSession()));
         connect(closeSessionButton, SIGNAL(clicked()),
                 this, SLOT(closeSession()));
         connect(stopSessionButton, SIGNAL(clicked()),
                 this, SLOT(stopSession()));
     #ifdef MAEMO_UI
         connect(deleteSessionButton, SIGNAL(clicked()),
                 this, SLOT(deleteSession()));
     #endif
     }

     SessionWidget::~SessionWidget()
     {
         delete session;
     }

     void SessionWidget::timerEvent(QTimerEvent *e)
     {
         if (e->timerId() == statsTimer) {
             rxData->setText(QString::number(session->bytesReceived()));
             txData->setText(QString::number(session->bytesWritten()));
             activeTime->setText(QString::number(session->activeTime()));
         }
     }

     #ifdef MAEMO_UI
     void SessionWidget::deleteSession()
     {
         delete this;
     }
     #endif

     void SessionWidget::updateSession()
     {
         updateSessionState(session->state());

         if (session->state() == QNetworkSession::Connected)
             statsTimer = startTimer(1000);
         else if (statsTimer != -1)
             killTimer(statsTimer);

         if (session->configuration().type() == QNetworkConfiguration::InternetAccessPoint)
             bearer->setText(session->configuration().bearerTypeName());
         else {
             QNetworkConfigurationManager mgr;
             QNetworkConfiguration c = mgr.configurationFromIdentifier(session->sessionProperty("ActiveConfiguration").toString());
             bearer->setText(c.bearerTypeName());
         }

     #ifndef QT_NO_NETWORKINTERFACE
         interfaceName->setText(session->interface().humanReadableName());
         interfaceGuid->setText(session->interface().name());
     #endif
     }

     void SessionWidget::openSession()
     {
         clearError();
         session->open();
         updateSession();
     }

     void SessionWidget::openSyncSession()
     {
         clearError();
         session->open();
         session->waitForOpened();
         updateSession();
     }

     void SessionWidget::closeSession()
     {
         clearError();
         session->close();
         updateSession();
     }

     void SessionWidget::stopSession()
     {
         clearError();
         session->stop();
         updateSession();
     }

     void SessionWidget::updateSessionState(QNetworkSession::State state)
     {
         QString s = tr("%1 (%2)");

         switch (state) {
         case QNetworkSession::Invalid:
             s = s.arg(tr("Invalid"));
             break;
         case QNetworkSession::NotAvailable:
             s = s.arg(tr("Not Available"));
             break;
         case QNetworkSession::Connecting:
             s = s.arg(tr("Connecting"));
             break;
         case QNetworkSession::Connected:
             s = s.arg(tr("Connected"));
             break;
         case QNetworkSession::Closing:
             s = s.arg(tr("Closing"));
             break;
         case QNetworkSession::Disconnected:
             s = s.arg(tr("Disconnected"));
             break;
         case QNetworkSession::Roaming:
             s = s.arg(tr("Roaming"));
             break;
         default:
             s = s.arg(tr("Unknown"));
         }

         if (session->isOpen())
             s = s.arg(tr("Open"));
         else
             s = s.arg(tr("Closed"));

         sessionState->setText(s);
     }

     void SessionWidget::updateSessionError(QNetworkSession::SessionError error)
     {
         lastError->setText(QString::number(error));
         errorString->setText(session->errorString());
     }

     void SessionWidget::clearError()
     {
         lastError->clear();
         errorString->clear();
     }