void Scroller::Scroll(Ctrl& p, const Rect& rc, Point newpos, Size cellsize)
{
	if(!IsNull(psb) && !p.IsTransparent()) {
		Point d = psb - newpos;
		p.ScrollView(rc, d.x * cellsize.cx, d.y * cellsize.cy);
	}
	else
		p.Refresh();
	psb = newpos;
}