Method menuCallbackOpacity

tests/cpp-tests/Source/MenuTest/MenuTest.cpp:298–306

}

void MenuLayer2::menuCallbackOpacity(Object* sender)
{
    auto menu       = static_cast<Menu*>(static_cast<Node*>(sender)->getParent());
    uint8_t opacity = menu->getOpacity();
    if (opacity == 128)
        menu->setOpacity(255);
    else
        menu->setOpacity(128);
}

void MenuLayer2::menuCallbackAlign(Object* sender)
{