forked from KolibriOS/kolibrios
110 lines
1.7 KiB
C
110 lines
1.7 KiB
C
//list_box
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struct llist
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{
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int x, y, w, h, min_h, line_h;
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int count, visible, first, current;
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int current_temp;
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void ClearList();
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int ProcessKey(dword key);
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int KeyDown();
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int KeyUp();
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int KeyHome();
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int KeyEnd();
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void SetSizes(int xx, yy, ww, hh, min_hh, line_hh);
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int MouseScroll(dword scroll_state);
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};
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void llist::ClearList()
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{
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count = visible = first = current = 0;
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}
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void llist::SetSizes(int xx, yy, ww, hh, min_hh, line_hh)
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{
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x = xx;
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y = yy;
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w = ww;
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h = hh;
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min_h = min_hh;
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line_h = line_hh;
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visible = h / line_h;
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}
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int llist::MouseScroll(dword scroll_state)
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{
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if (scroll_state == 65535)
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{
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if (first == 0) return 0;
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if (first > 3) first -= 2; else first=0;
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return 1;
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}
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if (scroll_state == 1)
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{
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if (visible+first+3 >= count) first = count - visible; else first+=2;
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return 1;
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}
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return 0;
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}
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int llist::ProcessKey(dword key)
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{
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switch(key)
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{
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case 177: return KeyDown();
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case 178: return KeyUp();
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case 180: return KeyHome();
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case 181: return KeyEnd();
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}
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return 0;
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}
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int llist::KeyDown()
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{
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if (current-first+1<visible)
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{
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if (current+1>=count) return 0;
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current++;
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}
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else
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{
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if (visible+first>=count) return 0;
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first++;
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current++;
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}
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return 1;
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}
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int llist::KeyUp()
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{
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if (current>first)
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{
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current--;
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}
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else
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{
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if (first==0) return 0;
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first--;
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current--;
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}
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return 1;
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}
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int llist::KeyHome()
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{
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if (current==0) && (first==0) return 0;
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current=0;
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first=0;
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return 1;
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}
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int llist::KeyEnd()
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{
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if (current==count-1) && (first==count-visible) return 0;
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current=count-1;
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first=count-visible;
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return 1;
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} |