void MainWindow::dragEnterEvent(QDragEnterEvent *event)
{
    // Simulate the player firing a dragStarted even to make the playlist close
    // its help text view. This lets one drop a clip directly into the playlist
    // from a fresh start.
    Mlt::GLWidget* videoWidget = (Mlt::GLWidget*) &Mlt::Controller::singleton();
    emit videoWidget->dragStarted();

    event->acceptProposedAction();
}
void MainWindow::dragEnterEvent(QDragEnterEvent *event)
{
     
     
     
    Mlt::GLWidget* videoWidget = (Mlt::GLWidget*) &Mlt::Controller::singleton();
    emit videoWidget->dragStarted();

    event->acceptProposedAction();
}