add skeleton for lollipop drags

gtk2_ardour/editor_drag.cc

@@ -7177,3 +7177,39 @@ RegionMarkerDrag::setup_pointer_sample_offset ()
 	const timepos_t model_abs_pos = rv->region ()->position () + (rv->region ()->start ().distance (model.position ()));
 	_pointer_offset               = model_abs_pos.distance (raw_grab_time ());
 }
+
+LollipopDrag::LollipopDrag (Editor* ed, MidiRegionView* r, ArdourCanvas::Item* i)
+	: Drag (ed, i, r->region ()->position ().time_domain ())
+{
+}
+
+LollipopDrag::~LollipopDrag ()
+{
+}
+
+void
+LollipopDrag::start_grab (GdkEvent *ev, Gdk::Cursor* c)
+{
+	Drag::start_grab (ev, c);
+}
+
+void
+LollipopDrag::motion (GdkEvent *ev, bool first_move)
+{
+}
+
+void
+LollipopDrag::finished (GdkEvent *ev, bool did_move)
+{
+}
+
+void
+LollipopDrag::aborted (bool)
+{
+}
+
+void
+LollipopDrag::setup_pointer_sample_offset ()
+{
+}
+

gtk2_ardour/editor_drag.h

@@ -1546,4 +1546,35 @@ class RegionMarkerDrag : public Drag
 	ARDOUR::CueMarker dragging_model;
 };
 
+
+class LollipopDrag : public Drag
+{
+  public:
+	LollipopDrag (Editor*, MidiRegionView*, ArdourCanvas::Item*);
+	~LollipopDrag ();
+
+	void start_grab (GdkEvent *, Gdk::Cursor* c = 0);
+	void motion (GdkEvent *, bool);
+	void finished (GdkEvent *, bool);
+	void aborted (bool);
+
+	bool allow_vertical_autoscroll () const {
+		return false;
+	}
+
+	bool allow_horizontal_autoscroll () const {
+		return false;
+	}
+
+	bool x_movement_matters () const {
+		return false;
+	}
+
+	void setup_pointer_sample_offset ();
+
+  private:
+	MidiRegionView* _region;
+	NoteBase*       _primary;
+};
+
 #endif /* __gtk2_ardour_editor_drag_h_ */