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downloadmanager.h Example File
demos/browser/downloadmanager.h

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 #ifndef DOWNLOADMANAGER_H
 #define DOWNLOADMANAGER_H

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

 #include <QtNetwork/QNetworkReply>
 #include <QtNetwork/QSslError>

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

 class DownloadItem : public QWidget, public Ui_DownloadItem
 {
     Q_OBJECT

 signals:
     void statusChanged();

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

     QUrl m_url;
     QNetworkAccessManager *m_manager;

     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;

     qint64 m_bytesReceived;
     QTime m_downloadTime;
 };

 class AutoSave;
 class DownloadModel;
 QT_BEGIN_NAMESPACE
 class QFileIconProvider;
 QT_END_NAMESPACE

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

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

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

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

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

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

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

     AutoSave *m_autoSave;
     DownloadModel *m_model;
     QNetworkAccessManager *m_manager;
     QFileIconProvider *m_iconProvider;
     QList<DownloadItem*> m_downloads;
     RemovePolicy m_removePolicy;
 };

 class DownloadModel : public QAbstractListModel
 {
     friend class DownloadManager;
     Q_OBJECT

 public:
     DownloadModel(DownloadManager *dm, 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_dm;

 };

 #endif // DOWNLOADMANAGER_H


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Qt 4.4.0-beta1