CalcClickRect
rect = widget->CalcClickRect(poseLoc, column, poseView);
rect = widget->CalcClickRect(pose->Location(poseView), NULL, poseView);
if (widget != NULL && widget->CalcClickRect(poseLoc, column, poseView).Contains(where)) {
BRect CalcClickRect(BPoint poseLoc, const BColumn*, const BPoseView*);