Example #1
0
void QDesignerMenuBar::showMenu(int index)
{
    if (index < 0 && m_currentIndex >= 0)
        index = m_currentIndex;

    if (index < 0 || index >= realActionCount())
        return;

    m_currentIndex = index;
    QAction *action = currentAction();

    if (action && action->menu()) {
        if (m_lastMenuActionIndex != -1 && m_lastMenuActionIndex != index) {
            hideMenu(m_lastMenuActionIndex);
        }

        m_lastMenuActionIndex = index;
        QMenu *menu = action->menu();
        const QRect g = actionGeometry(action);

        if (!menu->isVisible()) {
            if ((menu->windowFlags() & Qt::Popup) != Qt::Popup)
                menu->setWindowFlags(Qt::Popup);
            menu->adjustSize();
            if (layoutDirection() == Qt::LeftToRight) {
                menu->move(mapToGlobal(g.bottomLeft()));
            } else {
                // The position is not initially correct due to the unknown width,
                // causing it to overlap a bit the first time it is invoked.
                const QSize menuSize = menu->size();
                QPoint point = g.bottomRight() - QPoint(menu->width(), 0);
                menu->move(mapToGlobal(point));
            }
            menu->setFocus(Qt::MouseFocusReason);
            menu->raise();
            menu->show();
        } else {
            menu->raise();
        }
    }
}