Qt 4.8: mainwindow.cpp Example File (webkit/imageanalyzer/mainwindow.cpp)

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# mainwindow.cpp Example File

webkit/imageanalyzer/mainwindow.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
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     **     the documentation and/or other materials provided with the
     **     distribution.
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     **     from this software without specific prior written permission.
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     #include "mainwindow.h"
     #include "imageanalyzer.h"

     #include <QWebFrame>
     #include <QWebElementCollection>
     #include <QNetworkDiskCache>

     /*
      * Default Constructor
      */
     MainWin::MainWin(QWidget * parent) : QWebView(parent)
     {
         m_network = new QNetworkAccessManager(this);
         m_cache = new QNetworkDiskCache(this);
         m_cache->setCacheDirectory(QDesktopServices::storageLocation(QDesktopServices::CacheLocation) + "/imageanalyzer");
         m_cache->setMaximumCacheSize(1000000); //set the cache to 10megs
         m_network->setCache(m_cache);
         page()->setNetworkAccessManager(m_network);

         m_analyzer = new ImageAnalyzer(m_cache, this);

         // Signal is emitted before frame loads any web content:
         QObject::connect(page()->mainFrame(), SIGNAL(javaScriptWindowObjectCleared()),
                          this, SLOT(addJSObject()));

         // qrc:// URLs refer to resources. See imagenalayzer.qrc
         QUrl startURL = QUrl("qrc:/index.html");

         // Load web content now!
         setUrl(startURL);
     }

     void MainWin::addJSObject() {
         // Add pAnalyzer to JavaScript Frame as member "imageAnalyzer".
         page()->mainFrame()->addToJavaScriptWindowObject(QString("imageAnalyzer"), m_analyzer);
     }