TrackingView
TrackingView::TrackingView(BRect frame, const char* str, BMessage* message)
TrackingView::MouseDown(BPoint)
TrackingView::MouseMoved(BPoint, uint32 transit, const BMessage*)
TrackingView::MouseUp(BPoint)
TrackingView::Draw(BRect)
TrackingView* trackingView = new TrackingView(window->Bounds(),
TrackingView(BRect, const char* str, BMessage* message);