Hacky fix for track height step losing 'grip' on the

track being resized (#4503).


git-svn-id: svn://localhost/ardour2/branches/3.0@12747 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 19 insertions, 0 deletions

diff --git a/gtk2_ardour/editor.h b/gtk2_ardour/editor.h
index 5134b6a7a1..a2d7c93fd3 100644
--- a/gtk2_ardour/editor.h
+++ b/gtk2_ardour/editor.h
@@ -470,6 +470,14 @@ class Editor : public PublicEditor, public PBD::ScopedConnectionList, public ARD
 
 	void get_pointer_position (double &, double &) const;
 
+	TimeAxisView* stepping_axis_view () {
+		return _stepping_axis_view;
+	}
+	
+	void set_stepping_axis_view (TimeAxisView* v) {
+		_stepping_axis_view = v;
+	}
+
   protected:
 	void map_transport_state ();
 	void map_position_change (framepos_t);
@@ -2102,6 +2110,17 @@ class Editor : public PublicEditor, public PBD::ScopedConnectionList, public ARD
 	/** Flag for a bit of a hack wrt control point selection; see set_selected_control_point_from_click */
 	bool _control_point_toggled_on_press;
 
+	/** This is used by TimeAxisView to keep a track of the TimeAxisView that is currently being
+	    stepped in height using Shift-Scrollwheel.  When a scroll event occurs, we do the step on
+	    this _stepping_axis_view if it is non-0 (and we set up this _stepping_axis_view with the
+	    TimeAxisView underneath the mouse if it is 0).  Then Editor resets _stepping_axis_view when
+	    the shift key is released.  In this (hacky) way, pushing shift and moving the scroll wheel
+	    will operate on the same track until shift is released (rather than skipping about to whatever
+	    happens to be underneath the mouse at the time).
+	*/
+	TimeAxisView* _stepping_axis_view;
+	void shift_key_released ();
+
 	friend class Drag;
 	friend class RegionDrag;
 	friend class RegionMoveDrag;