downloadmanager.h Example File | Qt WebKit Examples 5.5

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# downloadmanager.h Example File

webkitwidgets/browser/downloadmanager.h

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the demonstration applications of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** Commercial License Usage
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    ** accordance with the commercial license agreement provided with the
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    **
    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
    ** General Public License version 2.1 or version 3 as published by the Free
    ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
    ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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    #ifndef DOWNLOADMANAGER_H
    #define DOWNLOADMANAGER_H

    #include "ui_downloads.h"
    #include "ui_downloaditem.h"

    #include <QtNetwork/QNetworkReply>

    #include <QtCore/QFile>
    #include <QtCore/QTime>

    class DownloadItem : public QWidget, public Ui_DownloadItem
    {
        Q_OBJECT

    signals:
        void statusChanged();

    public:
        DownloadItem(QNetworkReply *reply = 0, bool requestFileName = false, QWidget *parent = 0);
        bool downloading() const;
        bool downloadedSuccessfully() const;

        QUrl m_url;

        QFile m_output;
        QNetworkReply *m_reply;

    private slots:
        void stop();
        void tryAgain();
        void open();

        void downloadReadyRead();
        void error(QNetworkReply::NetworkError code);
        void downloadProgress(qint64 bytesReceived, qint64 bytesTotal);
        void metaDataChanged();
        void finished();

    private:
        void getFileName();
        void init();
        void updateInfoLabel();
        QString dataString(int size) const;

        QString saveFileName(const QString &directory) const;

        bool m_requestFileName;
        qint64 m_bytesReceived;
        QTime m_downloadTime;
    };

    class AutoSaver;
    class DownloadModel;
    class QFileIconProvider;

    class DownloadManager : public QDialog, public Ui_DownloadDialog
    {
        Q_OBJECT
        Q_PROPERTY(RemovePolicy removePolicy READ removePolicy WRITE setRemovePolicy)
        Q_ENUMS(RemovePolicy)

    public:
        enum RemovePolicy {
            Never,
            Exit,
            SuccessFullDownload
        };

        DownloadManager(QWidget *parent = 0);
        ~DownloadManager();
        int activeDownloads() const;

        RemovePolicy removePolicy() const;
        void setRemovePolicy(RemovePolicy policy);

    public slots:
        void download(const QNetworkRequest &request, bool requestFileName = false);
        inline void download(const QUrl &url, bool requestFileName = false)
            { download(QNetworkRequest(url), requestFileName); }
        void handleUnsupportedContent(QNetworkReply *reply, bool requestFileName = false);
        void cleanup();

    private slots:
        void save() const;
        void updateRow();

    private:
        void addItem(DownloadItem *item);
        void updateItemCount();
        void load();

        AutoSaver *m_autoSaver;
        DownloadModel *m_model;
        QNetworkAccessManager *m_manager;
        QFileIconProvider *m_iconProvider;
        QList<DownloadItem*> m_downloads;
        RemovePolicy m_removePolicy;
        friend class DownloadModel;
    };

    class DownloadModel : public QAbstractListModel
    {
        friend class DownloadManager;
        Q_OBJECT

    public:
        DownloadModel(DownloadManager *downloadManager, QObject *parent = 0);
        QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
        int rowCount(const QModelIndex &parent = QModelIndex()) const;
        bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex());

    private:
        DownloadManager *m_downloadManager;

    };

    #endif // DOWNLOADMANAGER_H