TextTrackState
class TextTrackState;
friend class TextTrackState;
TextTrackState* fTrackingMouse;
TextTrackState(BMessenger messenger);
~TextTrackState();
fTrackingMouse = new (nothrow) TextTrackState(messenger);
BTextView::TextTrackState::TextTrackState(BMessenger messenger)
BTextView::TextTrackState::~TextTrackState()
BTextView::TextTrackState::SimulateMouseMovement(BTextView* textView)