ClipRect
DrawTransaction transaction(this, fPainter->ClipRect(b));
DrawTransaction transaction(this, fPainter->ClipRect(b));
DrawTransaction transaction(this, fPainter->ClipRect(r));
touched = fPainter->ClipRect(touched);
DrawTransaction transaction(this, fPainter->ClipRect(r));
r = fPainter->ClipRect(r);
inline BRect ClipRect(BRect rect) const;
inline BRect ClipRect(const BRect& rect) const