kolibrios/programs/cmm/lib/list_box.h

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//list_box
struct llist
{
int x, y, w, h, min_h, line_h;
int count, visible, first, current;
int current_temp;
void ClearList();
int ProcessKey(dword key);
int KeyDown();
int KeyUp();
int KeyHome();
int KeyEnd();
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;
}
int llist::ProcessKey(dword key)
{
switch(key)
{
case 177: return KeyDown();
case 178: return KeyUp();
case 180: return KeyHome();
case 181: return KeyEnd();
}
return 0;
}
int llist::KeyDown()
{
if (current-first+1<visible)
{
if (current+1>=count) return 0;
current++;
}
else
{
if (visible+first>=count) return 0;
first++;
current++;
}
return 1;
}
int llist::KeyUp()
{
if (current>first)
{
current--;
}
else
{
if (first==0) return 0;
first--;
current--;
}
return 1;
}
int llist::KeyHome()
{
if (current==0) && (first==0) return 0;
current=0;
first=0;
return 1;
}
int llist::KeyEnd()
{
if (current==count-1) && (first==count-visible) return 0;
current=count-1;
first=count-visible;
return 1;
}