Implement constrained snapping when dragging the position and size handles of a rectangle in the node tool, with the ctrl-key being pressed.

(bzr r7497)

1 files changed, 6 insertions, 0 deletions

diff --git a/src/snapper.h b/src/snapper.h
index 0110a9154..cbd52f052 100644
--- a/src/snapper.h
+++ b/src/snapper.h
@@ -86,6 +86,12 @@ public:
             _has_point = true;
         }
 
+        Geom::Point projection(Geom::Point const &p) const { // returns the projection of p on this constraintline
+        	Geom::Point const p1_on_cl = _has_point ? _point : p;
+			Geom::Point const p2_on_cl = p1_on_cl + _direction;
+        	return Geom::projection(p, Geom::Line(p1_on_cl, p2_on_cl));
+        }
+
     private:
 
         bool _has_point;