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downloader.h

Go to the documentation of this file.

#ifndef _DOWNLOADER_H
#define _DOWNLOADER_H

#include <kurl.h>
#include <qobject.h>
#include <qptrlist.h>

class QFile;
class QTimer;
class Downloader;


namespace KIO
{
    class TransferJob;
    class Job;
}

class DownloadItem
{
    friend class Downloader;
public:
    DownloadItem();
    virtual ~DownloadItem();
    
    bool isDownloaded() const;

    QString localFilename() const;

    virtual void setLocalFilename(const QString &filename);

    virtual void downloadFinished();
    virtual void downloaded(int percent);
    virtual void downloadTimeout();
    /**
     * returns true if the download was scheduled,
     * or false if the file is local
     **/
    bool enqueue(const KURL &url);
    void dequeue();

private:
    QString mLocalFilename;
};

/**
 * download playlistitems, in a queue based fasion
 **/
class Downloader : public QObject
{
Q_OBJECT
    struct QueueItem
    {
        DownloadItem *notifier;
        KURL file;
        QString local;
    };

public:
    Downloader(QObject *parent=0);
    virtual ~Downloader();


public slots:
    QString enqueue(DownloadItem *notifier, const KURL &file);
    void dequeue(DownloadItem *notifier);

    /**
     * @internal
     **/
    void start();

signals:
    void enqueued(DownloadItem *notifier, const KURL &file);
    void dequeued(DownloadItem *notifier);
    
private slots:
    void getNext();
    
    void data( KIO::Job *, const QByteArray &data);
    void percent( KIO::Job *, unsigned long percent);
    void jobDone( KIO::Job *);
    void giveUpWithThisDownloadServerIsRunningNT();
    
private:
    QPtrList<Downloader::QueueItem> mQueue;
    QPtrList<Downloader::QueueItem> *mUnstartedQueue;
    QFile *localfile;
    Downloader::QueueItem *current; 
    KIO::TransferJob *mJob;
    QTimer *mTimeout;
    bool mStarted;
};

#endif

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