Qt 4.8: imageanalyzer.h Example File (webkit/imageanalyzer/imageanalyzer.h)

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# imageanalyzer.h Example File

webkit/imageanalyzer/imageanalyzer.h

     /****************************************************************************
     **
     ** 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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     **     notice, this list of conditions and the following disclaimer in
     **     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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     #ifndef IMAGEANALYZER_H
     #define IMAGEANALYZER_H

     #include <QFutureWatcher>
     #include <QtGui>

     class QNetworkAccessManager;
     class QNetworkReply;
     class QNetworkDiskCache;

     class ImageAnalyzer : public QObject
     {
         Q_OBJECT
     public:
         ImageAnalyzer(QNetworkDiskCache * netcache, QObject * parent=0);

         QRgb lastResults();
         float lastRed();
         float lastGreen();
         float lastBlue();
         bool isBusy();
         Q_PROPERTY(bool busy READ isBusy);
         Q_PROPERTY(float red READ lastRed);
         Q_PROPERTY(float green READ lastGreen);
         Q_PROPERTY(float blue READ lastBlue);
         ~ImageAnalyzer();

     public slots:
         /*! initiates analysis of all the urls in the list */
         void startAnalysis(const QStringList & urls);

     signals:
         void finishedAnalysis();
         void updateProgress(int completed, int total);

     private slots:
         void handleReply(QNetworkReply*);
         void doneProcessing();
         void progressStatus(int);

     private:
         QRgb processImages();
         void fetchURLs();
         void queueImage(QImage img);

     private:
         QNetworkAccessManager* m_network;
         QNetworkDiskCache* m_cache;
         QStringList m_URLQueue;
         QList<QImage> m_imageQueue;
         int m_outstandingFetches;
         QFutureWatcher<QRgb> * m_watcher;
     };

     QRgb averageRGB(const QImage &img);

     #endif