const float number_of_items_in_scrolling_area = scrolling_area_height / ITEM_HEIGHT;
const float percent_of_visible_items = number_of_items_in_scrolling_area / ((float) level_picker->items.count - 1);
if(percent_of_visible_items < 1) {
SDL_Rect scrollbar = rect_for_sdl(
rect_from_vecs(
const float number_of_items_in_scrolling_area = scrolling_area_height / ITEM_HEIGHT;
const float percent_of_visible_items = number_of_items_in_scrolling_area / ((float) level_picker->items.count - 1);
if(percent_of_visible_items < 1) {
SDL_Rect scrollbar = rect_for_sdl(
rect_from_vecs(