Method updateLength

core/ui/UIScrollViewBar.cpp:175–180

}

void ScrollViewBar::updateLength(float length)
{
    float ratio = length / _body->getTextureRect().size.height;
    _body->setScaleY(ratio);
    _upperHalfCircle->setPositionY(_body->getPositionY() + length);
}

void ScrollViewBar::onEnter()
{