void Paint(Draw& w) {
		Size sz = GetSize();
	
		for (double x = 0; x < sz.cx; x += (visible + hidden)) 
			for (double y = 0; y < sz.cy; y += (visible + hidden)) 
				w.DrawRect(int(x), int(y), int(hidden), int(hidden), SColorFace);
	}
	void Layout() {
		Font f = parent->GetFont();
		int q = f.GetHeight();
		visible = 0.1*q;
		hidden = 0.3*q;
	}