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) 2012 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** 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 Digia Plc and its Subsidiary(-ies) 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
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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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