downloadmanager.h Example File

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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