kolibrios-gitea/programs/cmm/lib/list_box.h

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//list_box
struct llist
{
int x, y, w, h, min_h;
int line_h;
int count, visible, first, current;
void ClearList();
void SetSizes(int xx, yy, ww, hh, min_hh, line_hh);
int MouseScroll(dword scroll_state);
};
void llist::ClearList()
{
count = visible = first = current = 0;
}
void llist::SetSizes(int xx, yy, ww, hh, min_hh, line_hh)
{
x = xx;
y = yy;
w = ww;
h = hh;
min_h = min_hh;
line_h = line_hh;
visible = h / line_h;
}
int llist::MouseScroll(dword scroll_state)
{
if (scroll_state == 65535)
{
if (first == 0) return 0;
if (first > 3) first -= 2; else first=0;
return 1;
}
if (scroll_state == 1)
{
if (visible+first+3 >= count) first = count - visible; else first+=2;
return 1;
}
return 0;
}