some prep work for generally handling dbl-click on draggable objects

gtk2_ardour/editor_drag.cc

@@ -160,6 +160,14 @@ DragManager::end_grab (GdkEvent* e)
 	return r;
 }
 
+void
+DragManager::mark_double_click ()
+{
+	for (list<Drag*>::const_iterator i = _drags.begin(); i != _drags.end(); ++i) {
+		(*i)->set_double_click (true);
+	}
+}
+
 bool
 DragManager::motion_handler (GdkEvent* e, bool from_autoscroll)
 {
@@ -212,6 +220,7 @@ Drag::Drag (Editor* e, ArdourCanvas::Item* i)
 	, _item (i)
 	, _pointer_frame_offset (0)
 	, _move_threshold_passed (false)
+	, _was_double_click (false)
 	, _raw_grab_frame (0)
 	, _grab_frame (0)
 	, _last_pointer_frame (0)
@@ -2974,6 +2983,10 @@ void
 MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
 {
 	if (!movement_occurred) {
+		
+		if (was_double_click()) {
+			cerr << "End of marker double click\n";
+		}
 
 		/* just a click, do nothing but finish
 		   off the selection process

gtk2_ardour/editor_drag.h

@@ -63,6 +63,8 @@ public:
 	bool end_grab (GdkEvent *);
 	bool have_item (ArdourCanvas::Item *) const;
 
+        void mark_double_click ();
+
 	/** @return true if an end drag or abort is in progress */
 	bool ending () const {
 		return _ending;
@@ -101,7 +103,7 @@ private:
 class Drag
 {
 public:
-	Drag (Editor *, ArdourCanvas::Item *);
+        Drag (Editor *, ArdourCanvas::Item *);
 	virtual ~Drag () {}
 
 	void set_manager (DragManager* m) {
@@ -120,6 +122,9 @@ public:
 	ARDOUR::framepos_t adjusted_frame (ARDOUR::framepos_t, GdkEvent const *, bool snap = true) const;
 	ARDOUR::framepos_t adjusted_current_frame (GdkEvent const *, bool snap = true) const;
 
+        bool was_double_click() const { return _was_double_click; }
+        void set_double_click (bool yn) { _was_double_click = yn; }
+
 	/** Called to start a grab of an item.
 	 *  @param e Event that caused the grab to start.
 	 *  @param c Cursor to use, or 0.
@@ -225,6 +230,7 @@ protected:
 private:
 
 	bool _move_threshold_passed; ///< true if the move threshold has been passed, otherwise false
+        bool _was_double_click; ///< true if drag initiated by a double click event
 	double _grab_x; ///< trackview x of the grab start position
 	double _grab_y; ///< trackview y of the grab start position
 	double _last_pointer_x; ///< trackview x of the pointer last time a motion occurred
@@ -694,7 +700,7 @@ public:
 class MarkerDrag : public Drag
 {
 public:
-	MarkerDrag (Editor *, ArdourCanvas::Item *);
+        MarkerDrag (Editor *, ArdourCanvas::Item *);
 	~MarkerDrag ();
 
 	void start_grab (GdkEvent *, Gdk::Cursor* c = 0);

gtk2_ardour/editor_mouse.cc

@@ -1293,6 +1293,11 @@ Editor::button_press_handler_2 (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 bool
 Editor::button_press_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_type)
 {
+	if (event->type == GDK_2BUTTON_PRESS) {
+		_drags->mark_double_click ();
+		return false;
+	}
+
 	if (event->type != GDK_BUTTON_PRESS) {
 		return false;
 	}