1 files changed, 11 insertions, 6 deletions
diff --git a/src/ui/tool/curve-drag-point.cpp b/src/ui/tool/curve-drag-point.cpp
index 4ca736f80..013553410 100644
--- a/src/ui/tool/curve-drag-point.cpp
+++ b/src/ui/tool/curve-drag-point.cpp
@@ -53,9 +53,11 @@ bool CurveDragPoint::grabbed(GdkEventMotion */*event*/)
 
         // delta is a vector equal 1/3 of distance from first to second
         Geom::Point delta = (second->position() - first->position()) / 3.0;
-        first->front()->move(first->front()->position() + delta);
-        second->back()->move(second->back()->position() - delta);
-
+        // only update the nodes if the mode is bspline
+        if(!_pm.isBSpline(false)){
+            first->front()->move(first->front()->position() + delta);
+            second->back()->move(second->back()->position() - delta);
+        }
         _pm.update();
     } else {
         _segment_was_degenerate = false;
@@ -88,9 +90,12 @@ void CurveDragPoint::dragged(Geom::Point &new_pos, GdkEventMotion *event)
     Geom::Point offset0 = ((1-weight)/(3*t*(1-t)*(1-t))) * delta;
     Geom::Point offset1 = (weight/(3*t*t*(1-t))) * delta;
 
-    first->front()->move(first->front()->position() + offset0);
-    second->back()->move(second->back()->position() + offset1);
-
+    //modified so that, if the trace is bspline, it only acts if the SHIFT key is pressed
+    if(!_pm.isBSpline(false)){
+        first->front()->move(first->front()->position() + offset0);
+        second->back()->move(second->back()->position() + offset1);
+    }else if(weight>=0.8 && held_shift(*event))second->back()->move(new_pos);
+    else if(weight<=0.2 && held_shift(*event))first->front()->move(new_pos);
     _pm.update();
 }