downloadmanager.h Example File | Qt WebKit Examples 5.9

Qt 5.9 | Qt WebKit Examples | Tab Browser | downloadmanager.h Example File

Qt 5.9.2 Reference Documentation

# 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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      ** GNU Lesser General Public License Usage
      ** Alternatively, this file may be used under the terms of the GNU Lesser
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      ** 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