create nonfunctional clip boundary drags when appropriate

gtk2_ardour/editing_context.h

@@ -253,6 +253,8 @@ class EditingContext : public ARDOUR::SessionHandlePtr, public AxisViewProvider
 	virtual bool canvas_velocity_base_event (GdkEvent* event, ArdourCanvas::Item*) = 0;
 	virtual bool canvas_velocity_event (GdkEvent* event, ArdourCanvas::Item*) = 0;
 	virtual bool canvas_control_point_event (GdkEvent* event, ArdourCanvas::Item*, ControlPoint*) = 0;
+	virtual bool canvas_cue_start_event (GdkEvent* event, ArdourCanvas::Item*) { return true; }
+	virtual bool canvas_cue_end_event (GdkEvent* event, ArdourCanvas::Item*) { return true; }
 
 	Temporal::Beats get_grid_type_as_beats (bool& success, Temporal::timepos_t const & position) const;
 	Temporal::Beats get_draw_length_as_beats (bool& success, Temporal::timepos_t const & position) const;

gtk2_ardour/editor_drag.cc

@@ -7546,6 +7546,7 @@ ClipStartDrag::ClipStartDrag (EditingContext& ec, ArdourCanvas::Rectangle& r, Te
 	, dragging_rect (&r)
 	, original_start (os)
 {
+	std::cerr << "CSD!\n";
 }
 
 ClipStartDrag::~ClipStartDrag ()
@@ -7568,11 +7569,13 @@ ClipStartDrag::end_grab (GdkEvent* ev)
 void
 ClipStartDrag::motion (GdkEvent*, bool)
 {
+	std::cerr << "clip start drag\n";
 }
 
 void
 ClipStartDrag::finished (GdkEvent*, bool)
 {
+	std::cerr << "clip start drag ALL DONE\n";
 }
 
 void

gtk2_ardour/midi_cue_editor.cc

@@ -495,6 +495,17 @@ MidiCueEditor::canvas_velocity_event (GdkEvent* event, ArdourCanvas::Item* item)
 	return typed_event (item, event, VelocityItem);
 }
 
+bool
+MidiCueEditor::canvas_cue_start_event (GdkEvent* event, ArdourCanvas::Item* item)
+{
+	return typed_event (item, event, ClipStartItem);
+}
+
+bool
+MidiCueEditor::canvas_cue_end_event (GdkEvent* event, ArdourCanvas::Item* item)
+{
+	return typed_event (item, event, ClipEndItem);
+}
 
 Gtk::Widget&
 MidiCueEditor::viewport()
@@ -641,6 +652,24 @@ MidiCueEditor::button_press_handler_1 (ArdourCanvas::Item* item, GdkEvent* event
 		return true;
 	}
 
+	case ClipStartItem: {
+		ArdourCanvas::Rectangle* r = dynamic_cast<ArdourCanvas::Rectangle*> (item);
+		if (r) {
+			_drags->set (new ClipStartDrag (*this, *r, timepos_t (BeatTime)), event);
+		}
+		return true;
+		break;
+	}
+
+	case ClipEndItem: {
+		ArdourCanvas::Rectangle* r = dynamic_cast<ArdourCanvas::Rectangle*> (item);
+		if (r) {
+			_drags->set (new ClipEndDrag (*this, *r, timepos_t (BeatTime)), event);
+		}
+		return true;
+		break;
+	}
+
 	default:
 		break;
 	}
@@ -1849,4 +1878,3 @@ MidiCueEditor::automation_button_click (Evoral::ParameterType type, int id, Sele
 		view->update_automation_display (Evoral::Parameter (type, 0, id), op);
 	}
 }
-

gtk2_ardour/midi_cue_editor.h

@@ -68,6 +68,8 @@ class MidiCueEditor : public CueEditor
 	bool canvas_velocity_base_event (GdkEvent* event, ArdourCanvas::Item*);
 	bool canvas_velocity_event (GdkEvent* event, ArdourCanvas::Item*);
 	bool canvas_control_point_event (GdkEvent* event, ArdourCanvas::Item*, ControlPoint*);
+	bool canvas_cue_start_event (GdkEvent* event, ArdourCanvas::Item*);
+	bool canvas_cue_end_event (GdkEvent* event, ArdourCanvas::Item*);
 
 	int32_t get_grid_beat_divisions (Editing::GridType gt) const { return 1; }
 	int32_t get_grid_music_divisions (Editing::GridType gt, uint32_t event_state) const { return 1; }

gtk2_ardour/midi_view.cc

@@ -207,11 +207,19 @@ MidiView::show_start (bool yn)
 		_start_boundary_rect = new ArdourCanvas::Rectangle (_note_group->parent());
 		_start_boundary_rect->set_fill_color (0x00ff0043);
 		_start_boundary_rect->set_outline_color (0x00ff00ff);
+
+		_start_boundary_rect->Event.connect (sigc::mem_fun (*this, &MidiView::start_boundary_event));
 	}
 
 	size_start_rect ();
 }
 
+bool
+MidiView::start_boundary_event (GdkEvent* ev)
+{
+	return _editing_context.typed_event (_start_boundary_rect, ev, ClipStartItem);
+}
+
 void
 MidiView::size_start_rect ()
 {
@@ -245,12 +253,19 @@ MidiView::show_end (bool yn)
 		_end_boundary_rect = new ArdourCanvas::Rectangle (_note_group->parent());
 		_end_boundary_rect->set_fill_color (0xff000043);
 		_end_boundary_rect->set_outline_color (0xff0000ff);
+
+		_end_boundary_rect->Event.connect (sigc::mem_fun (*this, &MidiView::end_boundary_event));
 	}
 
-
 	size_end_rect ();
 }
 
+bool
+MidiView::end_boundary_event (GdkEvent* ev)
+{
+	return _editing_context.typed_event (_end_boundary_rect, ev, ClipEndItem);
+}
+
 void
 MidiView::size_end_rect ()
 {

gtk2_ardour/midi_view.h

@@ -655,6 +655,9 @@ class MidiView : public virtual sigc::trackable, public LineMerger
 
 	void size_start_rect ();
 	void size_end_rect ();
+	bool start_boundary_event (GdkEvent*);
+	bool end_boundary_event (GdkEvent*);
+
 	virtual void add_control_points_to_selection (Temporal::timepos_t const &, Temporal::timepos_t const &, double y0, double y1) {}
 };