Allow to drag time selection markers

gtk2_ardour/editor_canvas.cc

@@ -1480,7 +1480,6 @@ Editor::which_canvas_cursor(ItemType type) const
 	case MinsecRulerItem:
 	case BBTRulerItem:
 	case SamplesRulerItem:
-	case SelectionMarkerItem:
 		cursor = _cursors->timebar;
 		break;
 
@@ -1498,6 +1497,7 @@ Editor::which_canvas_cursor(ItemType type) const
 	case VideoBarItem:
 	case TransportMarkerBarItem:
 	case DropZoneItem:
+	case SelectionMarkerItem:
 		cursor = _cursors->grabber;
 		break;
 

gtk2_ardour/editor_drag.cc

@@ -5805,6 +5805,64 @@ SelectionDrag::aborted (bool)
 	/* XXX: TODO */
 }
 
+SelectionMarkerDrag::SelectionMarkerDrag (Editor* e, ArdourCanvas::Item* i)
+	: Drag (e, i, e->default_time_domain ())
+	, _edit_start (true)
+{
+	DEBUG_TRACE (DEBUG::Drags, "New SelectionMarkerDrag\n");
+	bool ok = _editor->get_selection_extents (_start_at_start, _end_at_start);
+	assert (ok);
+
+	// SelectionStart, SelectionEnd
+	cout << " SelectionMarkerDrag " << _start_at_start << " - " << _end_at_start << " " << i->whoami() << "\n";
+}
+
+void
+SelectionMarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
+{
+	Drag::start_grab (event);
+	timepos_t const pos = adjusted_current_time (event, false);
+	_edit_start = pos.distance (_start_at_start).abs () <  pos.distance (_end_at_start).abs ();
+}
+
+void
+SelectionMarkerDrag::motion (GdkEvent* event, bool first_move)
+{
+	if (first_move) {
+		_editor->begin_reversible_selection_op (X_("set time selection"));
+	}
+	timepos_t const pos = adjusted_current_time (event, true);
+	if (_edit_start) {
+		if (pos < _end_at_start) {
+			_editor->get_selection ().clear_time ();
+			_editor->get_selection ().add (pos, _end_at_start);
+		}
+	} else {
+		if (pos > _start_at_start) {
+			_editor->get_selection ().clear_time ();
+			_editor->get_selection ().add (_start_at_start, pos);
+		}
+	}
+}
+
+void
+SelectionMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
+{
+	if (movement_occurred) {
+		_editor->commit_reversible_selection_op ();
+	}
+}
+
+void
+SelectionMarkerDrag::aborted (bool movement_occurred)
+{
+	if (movement_occurred) {
+		_editor->abort_reversible_selection_op ();
+	}
+	_editor->get_selection ().clear_time ();
+	_editor->get_selection ().add (_start_at_start, _end_at_start);
+}
+
 RangeMarkerBarDrag::RangeMarkerBarDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
 	: Drag (e, i, e->default_time_domain (), false)
 	, _operation (o)

gtk2_ardour/editor_drag.h

@@ -1378,6 +1378,23 @@ private:
 	Temporal::timepos_t end_at_start;
 };
 
+/** Drag time-selection markers */
+class SelectionMarkerDrag : public Drag
+{
+public:
+	SelectionMarkerDrag (Editor*, ArdourCanvas::Item*);
+
+	void start_grab (GdkEvent*, Gdk::Cursor* c = 0);
+	void motion (GdkEvent*, bool);
+	void finished (GdkEvent *, bool);
+	void aborted (bool);
+
+private:
+	bool                _edit_start;
+	Temporal::timepos_t _start_at_start;
+	Temporal::timepos_t _end_at_start;
+};
+
 /** Range marker drag */
 class RangeMarkerBarDrag : public Drag
 {

gtk2_ardour/editor_mouse.cc

@@ -800,6 +800,10 @@ Editor::button_press_handler_1 (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 		_drags->set (new BBTMarkerDrag (this, item), event);
 		return true;
 
+	case SelectionMarkerItem:
+		_drags->set (new SelectionMarkerDrag (this, item), event);
+		return true;
+
 	case MeterMarkerItem:
 		_drags->set (
 			new MeterMarkerDrag (
@@ -849,7 +853,6 @@ Editor::button_press_handler_1 (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 	case SamplesRulerItem:
 	case MinsecRulerItem:
 	case MarkerBarItem:
-	case SelectionMarkerItem:
 		if (!Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)
 		    && !ArdourKeyboard::indicates_constraint (event->button.state)) {
 			_drags->set (new CursorDrag (this, *_playhead_cursor, false), event);
@@ -1794,6 +1797,7 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 		case AutomationLineItem:
 		case StartSelectionTrimItem:
 		case EndSelectionTrimItem:
+		case SelectionMarkerItem:
 			return true;
 
 		case MarkerBarItem:
@@ -1841,7 +1845,6 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 		case SamplesRulerItem:
 		case MinsecRulerItem:
 		case BBTRulerItem:
-		case SelectionMarkerItem:
 			return true;
 			break;