spline: fix busy-loop in widget redraw

1 files changed, 3 insertions, 1 deletions

diff --git a/spline/spline.cpp b/spline/spline.cpp
index a2cf2e1e..466a9a7f 100644
--- a/spline/spline.cpp
+++ b/spline/spline.cpp
@@ -42,8 +42,10 @@ void spline::set_tracking_active(bool value) const
     std::shared_ptr<settings> S;
     {
         QMutexLocker l(&mtx);
-        S = s;
+        if (value == activep)
+            return;
         activep = value;
+        S = s;
     }
     emit S->recomputed();
 }