double ScrollBar::get_area_size() const {
if (orientation==VERTICAL) {
double area=get_size().height;
area-=get_stylebox("scroll")->get_minimum_size().height;
area-=get_icon("increment")->get_height();
area-=get_icon("decrement")->get_height();
area-=get_grabber_min_size();
return area;
} else if (orientation==HORIZONTAL) {
double area=get_size().width;
area-=get_stylebox("scroll")->get_minimum_size().width;
area-=get_icon("increment")->get_width();
area-=get_icon("decrement")->get_width();
area-=get_grabber_min_size();
return area;
} else {
return 0;
}
}
Size2 ScrollBar::get_minimum_size() const {
Ref<Texture> incr = get_icon("increment");
Ref<Texture> decr = get_icon("decrement");
Ref<StyleBox> bg = get_stylebox("scroll");
Size2 minsize;
if (orientation == VERTICAL) {
minsize.width = MAX(incr->get_size().width, (bg->get_minimum_size() + bg->get_center_size()).width);
minsize.height += incr->get_size().height;
minsize.height += decr->get_size().height;
minsize.height += bg->get_minimum_size().height;
minsize.height += get_grabber_min_size();
}
if (orientation == HORIZONTAL) {
minsize.height = MAX(incr->get_size().height, (bg->get_center_size() + bg->get_minimum_size()).height);
minsize.width += incr->get_size().width;
minsize.width += decr->get_size().width;
minsize.width += bg->get_minimum_size().width;
minsize.width += get_grabber_min_size();
}
return minsize;
}
double ScrollBar::get_grabber_size() const {
float range = get_max()-get_min();
if (range<=0)
return 0;
float page = (get_page()>0)? get_page() : 0;
// if (grabber_range < get_step())
// grabber_range=get_step();
double area_size=get_area_size();
double grabber_size = page / range * area_size;
return grabber_size+get_grabber_min_size();
}
