class ColoredCell : public Display
{
public:
  static bool isBlack(String s);
  void PaintBackground(Draw& w, const Rect& r, const Value& q,
	                     Color ink, Color paper, dword style) const;
	
};

bool ColoredCell::isBlack(String s)
{
  if(s[1] == 'B') return true;  
  return false;
}

void ColoredCell::PaintBackground(Draw& w, const Rect& r, const Value& q,
	                               Color ink, Color paper, dword style) const
{
    if( isBlack(AsString(q)) )	paper = Color(255, 150, 150);	
	Display::PaintBackground(w, r, q, ink, paper, style);
}