drag and drop: drag item from QListWidget to desktop or any open directory

[Vovasty]

Hi everyone!
I have QListWidget who contains list of files path. This files i'm dropped from explorer,
but i don't know how to implement drag and drop from QListWidget to the desktop or explorer.
This is my try...

void FileListWidget::startDrag()
{
    if (currentItem()) {
        QByteArray data;
        QFile src(currentItem()->text());
        src.open(QIODevice::ReadOnly);
        data = src.readAll();
        src.close();
        QMimeData *mime = new QMimeData;
        mime->setData("text/uri-list", data);
 
        QDrag *drag = new QDrag(this);
        drag->setMimeData(mime);
        drag->exec(Qt::CopyAction | Qt::MoveAction, Qt::CopyAction);
    }
}

void FileListWidget::startDrag()
{
    if (currentItem()) {
        QByteArray data;
        QFile src(currentItem()->text());
        src.open(QIODevice::ReadOnly);
        data = src.readAll();
        src.close();
        QMimeData *mime = new QMimeData;
        mime->setData("text/uri-list", data);

        QDrag *drag = new QDrag(this);
        drag->setMimeData(mime);
        drag->exec(Qt::CopyAction | Qt::MoveAction, Qt::CopyAction);
    }
}

To copy to clipboard, switch view to plain text mode 

... but it's not working (error when copying file). Please explain me, what should I do to solve this problem?

P.S. Sorry for my bad English