[PyQt] modifying a Qt Class: how to get the equivalent of macro Q_D in PyQt?

[TP]

Hi everybody,

I have subclassed QComboBox. For example I have changed paintEvent to get a
customized look. It works perfectly. But I have also to change the behavior
of the mouse wheel on the combo box. For this, I would like to subclass the
function wheelEvent of QComboBox (see below its C++ source code, you can
find it in the Qt source code in the directory
src/gui/widgets/qcombobox.cpp).

This function seems easy to understand and subclass, except for one thing:
the macro Q_D creates a pointer d. How to do the same thing in PyQt? What
is the PyQt equivalent of Q_D?

Thanks a lot,

Julien

###### method wheelEvent of QComboBox

void QComboBox::wheelEvent(QWheelEvent *e)
{
    Q_D(QComboBox);
    if (!d->viewContainer()->isVisible()) {
        int newIndex = currentIndex();

        if (e->delta() > 0) {
            newIndex--;
            while ((newIndex >= 0) && 
(d->model->flags(d->model->index(newIndex,d->modelColumn,d->root)) &
Qt::ItemIsEnabled))
                newIndex--;
        } else {
            newIndex++;
            while ((newIndex < count()) && 
(d->model->flags(d->model->index(newIndex,d->modelColumn,d->root)) &
Qt::ItemIsEnabled))
                newIndex++;
        }

        if (newIndex >= 0 && newIndex < count() && newIndex !=
currentIndex()) {
            setCurrentIndex(newIndex);
            d->emitActivated(d->currentIndex);
        }
        e->accept();
    }
}
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9&1+,\'Z4(55l4('])"

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