Method setDown

dgl/src/ImageBaseWidgets.cpp:928–935

template <class ImageType>
void ImageBaseSwitch<ImageType>::setDown(const bool down) noexcept
{
    if (pData->isDown == down)
        return;

    pData->isDown = down;
    repaint();
}

template <class ImageType>
void ImageBaseSwitch<ImageType>::setCallback(Callback* const callback) noexcept