Drop docx files in Qt on Windows

[denix56]

I am trying to make my program get documents like docx, pptx etc when i drop those files in the widget. I need to unpack those files(because docx is zip format). I dont know how to get path to source file for 7z, so i have decided to copy received data to temporary file. But i get empty output file. What is wrong?

void DragnDropWidget::dropEvent(QDropEvent *event)
{
    QTemporaryFile docFile("C:/Users/Denis/Documents/Document_XXXXXX.docx");
    docFile.setAutoRemove(false);
    docFile.open();
    docFile.write(event->mimeData()->data("application/x-qt-windows-mime;"
                                              "value=\"FileContents\""));
    event->acceptProposedAction();
    docFile.close();
}

[raven-worx]

@denix56
what does open() return?
Is the data returned from the mimeData() valid?