Keep track of where a RegionView used to be before it was reparented for a drag. Fixes wayward drag-moves in stacked region mode.

git-svn-id: svn://localhost/ardour2/branches/3.0@6867 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 8 insertions, 1 deletions

diff --git a/gtk2_ardour/editor_drag.h b/gtk2_ardour/editor_drag.h
index fb66a2c746..d0bd00f5e6 100644
--- a/gtk2_ardour/editor_drag.h
+++ b/gtk2_ardour/editor_drag.h
@@ -210,6 +210,13 @@ private:
 	nframes64_t _last_pointer_frame; ///< adjusted_frame the last time a motion occurred
 };
 
+struct DraggingView
+{
+	DraggingView (RegionView* v);
+
+	RegionView* view; ///< the view
+	double initial_y; ///< the initial y position of the view before any reparenting
+};
 
 /** Abstract base class for drags that involve region(s) */
 class RegionDrag : public Drag, public sigc::trackable
@@ -221,7 +228,7 @@ public:
 protected:
 
 	RegionView* _primary; ///< the view that was clicked on (or whatever) to start the drag
-	std::list<RegionView*> _views; ///< all views that are being dragged
+	std::list<DraggingView> _views; ///< information about all views that are being dragged
 
 private:
 	void region_going_away (RegionView *);