Function recheckArea

dgl/src/ImageBaseWidgets.cpp:489–507

          sliderArea() {}

    void recheckArea() noexcept
    {
        if (startPos.getY() == endPos.getY())
        {
            // horizontal
            sliderArea = Rectangle<double>(startPos.getX(),
                                           startPos.getY(),
                                           endPos.getX() + static_cast<int>(image.getWidth()) - startPos.getX(),
                                           static_cast<int>(image.getHeight()));
        }
        else
        {
            // vertical
            sliderArea = Rectangle<double>(startPos.getX(),
                                           startPos.getY(),
                                           static_cast<int>(image.getWidth()),
                                           endPos.getY() + static_cast<int>(image.getHeight()) - startPos.getY());
        }
    }

    DISTRHO_DECLARE_NON_COPYABLE(PrivateData)
};