Change/Fix EditorDrag::move_threshold to use pixel units for both x and y thresholds

gtk2_ardour/editor_drag.cc

@@ -387,14 +387,13 @@ Drag::motion_handler (GdkEvent* event, bool from_autoscroll)
 		return false;
 	}
 
-	pair<framecnt_t, int> const threshold = move_threshold ();
+	pair<double, double> const threshold = move_threshold ();
 
 	bool const old_move_threshold_passed = _move_threshold_passed;
 
 	if (!_move_threshold_passed) {
-
-		bool const xp = (::llabs (_drags->current_pointer_frame () - _raw_grab_frame) >= threshold.first);
-		bool const yp = (::fabs ((current_pointer_y () - _grab_y)) >= threshold.second);
+		bool const xp = (fabs(pointer_delta_from_grab_x()) >= threshold.first);
+		bool const yp = (fabs(pointer_delta_from_grab_y()) >= threshold.second);
 
 		_move_threshold_passed = ((xp && x_movement_matters()) || (yp && y_movement_matters()));
 	}

gtk2_ardour/editor_drag.h

@@ -180,8 +180,9 @@ public:
 		return true;
 	}
 
-	/** @return minimum number of frames (in x) and pixels (in y) that should be considered a movement */
-	virtual std::pair<ARDOUR::framecnt_t, int> move_threshold () const {
+	/** @return minimum number of pixels (in x) and pixels (in y) that should be
+	 * considered a movement */
+	virtual std::pair<double, double> move_threshold () const {
 		return std::make_pair (1, 1);
 	}
 
@@ -243,6 +244,12 @@ protected:
 	double current_pointer_x () const;
 	double current_pointer_y () const;
 
+	double pointer_delta_from_grab_x () const
+	{ return current_pointer_x() - grab_x(); }
+
+	double pointer_delta_from_grab_y () const
+	{ return current_pointer_y() - grab_y(); }
+
 	/* sets snap delta from unsnapped pos */
 	void setup_snap_delta (framepos_t pos);
 
@@ -391,7 +398,7 @@ public:
 		return true;
 	}
 
-	std::pair<ARDOUR::framecnt_t, int> move_threshold () const {
+	std::pair<double, double> move_threshold () const {
 		return std::make_pair (4, 4);
 	}
 
@@ -918,7 +925,7 @@ public:
 	void finished (GdkEvent *, bool);
 	void aborted (bool);
 
-	std::pair<ARDOUR::framecnt_t, int> move_threshold () const {
+	std::pair<double, double> move_threshold () const {
 		return std::make_pair (8, 1);
 	}
 
@@ -1076,7 +1083,7 @@ public:
 	void finished (GdkEvent *, bool);
 	void aborted (bool);
 
-	std::pair<ARDOUR::framecnt_t, int> move_threshold () const {
+	std::pair<double, double> move_threshold () const {
 		return std::make_pair (4, 4);
 	}
 
@@ -1140,7 +1147,7 @@ class CrossfadeEdgeDrag : public Drag
 		return false;
 	}
 
-	virtual std::pair<ARDOUR::framecnt_t, int> move_threshold () const {
+	virtual std::pair<double, double> move_threshold () const {
 		return std::make_pair (4, 4);
 	}