Qt 5.7 | Qt WebEngine | WebEngine Demo Browser Example | downloadmanager.h Example File

Qt 5.7.1 Reference Documentation

# downloadmanager.h Example File

webenginewidgets/demobrowser/downloadmanager.h

      /****************************************************************************
      **
      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the demonstration applications of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** Commercial License Usage
      ** Licensees holding valid commercial Qt licenses may use this file in
      ** accordance with the commercial license agreement provided with the
      ** Software or, alternatively, in accordance with the terms contained in
      ** a written agreement between you and The Qt Company. For licensing terms
      ** and conditions see https://www.qt.io/terms-conditions. For further
      ** information use the contact form at https://www.qt.io/contact-us.
      **
      ** BSD License Usage
      ** Alternatively, 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 The Qt Company Ltd 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
      ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #ifndef DOWNLOADMANAGER_H
      #define DOWNLOADMANAGER_H

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

      #include <QtCore/QFileInfo>
      #include <QtCore/QTime>
      #include <QtCore/QUrl>

      #include <QWebEngineDownloadItem>

      class DownloadManager;
      class DownloadWidget : public QWidget, public Ui_DownloadItem
      {
          Q_OBJECT

      signals:
          void statusChanged();

      public:
          DownloadWidget(QWebEngineDownloadItem *download, QWidget *parent = 0);
          bool downloading() const;
          bool downloadedSuccessfully() const;

          void init();
          bool getFileName(bool promptForFileName = false);

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

          void downloadProgress(qint64 bytesReceived, qint64 bytesTotal);
          void finished();

      private:
          friend class DownloadManager;
          void updateInfoLabel();
          QString dataString(int size) const;

          QUrl m_url;
          QFileInfo m_file;
          qint64 m_bytesReceived;
          QTime m_downloadTime;
          bool m_stopped;

          QScopedPointer<QWebEngineDownloadItem> m_download;
      };

      class AutoSaver;
      class DownloadModel;
      class QFileIconProvider;

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

      public:
          enum RemovePolicy {
              Never,
              Exit,
              SuccessFullDownload
          };
          Q_ENUM(RemovePolicy)

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

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

      public slots:
          void download(QWebEngineDownloadItem *download);
          void cleanup();

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

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

          AutoSaver *m_autoSaver;
          DownloadModel *m_model;
          QFileIconProvider *m_iconProvider;
          QList<DownloadWidget*> 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