imageanalyzer.h - mozsearch

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// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

#ifndef IMAGEANALYZER_H

#define IMAGEANALYZER_H

#include <QFutureWatcher>

#include <QtWidgets>

QT_BEGIN_NAMESPACE

class QNetworkAccessManager;

class QNetworkReply;

class QNetworkDiskCache;

QT_END_NAMESPACE

//! [ ImageAnalyzer - public interface ]

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);

    //! [ ImageAnalyzer - public interface ]

private slots:

    void handleReply(QNetworkReply*);

    void doneProcessing();

    void progressStatus(int);

private:

    QRgb processImages();

    void fetchURLs();

    void queueImage(QImage img);

    //! [ ImageAnalyzer - private members ]

private:

    QNetworkAccessManager* m_network;

    QNetworkDiskCache* m_cache;

    QStringList m_URLQueue;

    QList<QImage> m_imageQueue;

    int m_outstandingFetches;

    QFutureWatcher<QRgb> * m_watcher;

    //! [ ImageAnalyzer - private members ]

};

QRgb averageRGB(const QImage &img);

#endif