3 files changed, 28 insertions, 17 deletions
diff --git a/spline/spline-widget.cpp b/spline/spline-widget.cpp
index a80e08b7..2aa5e6ac 100644
--- a/spline/spline-widget.cpp
+++ b/spline/spline-widget.cpp
@@ -49,25 +49,23 @@ spline_widget::~spline_widget()
 
 void spline_widget::setConfig(spline* spl)
 {
-    if (spl != _config)
+    if (connection)
     {
-        if (connection)
-        {
-            QObject::disconnect(connection);
-            connection = QMetaObject::Connection();
-        }
+        QObject::disconnect(connection);
+        connection = QMetaObject::Connection();
+    }
 
-        if (spl)
-        {
-            std::shared_ptr<spline::settings> s = spl->get_settings();
-            connection = connect(s.get(), &spline::settings::recomputed,
-                                 this, [this]() { reload_spline(); },
-                                 Qt::QueuedConnection);
-        }
+    _config = spl;
 
-        _config = spl;
-        _background = QPixmap();
+    if (spl)
+    {
         update_range();
+        _config->ensure_valid(_config->get_points());
+
+        std::shared_ptr<spline::settings> s = spl->get_settings();
+        connection = connect(s.get(), &spline::settings::recomputed,
+                             this, [this]() { reload_spline(); },
+        Qt::QueuedConnection);
     }
 }
 
@@ -509,6 +507,8 @@ void spline_widget::mouseReleaseEvent(QMouseEvent *e)
 
 void spline_widget::reload_spline()
 {
+    if (_config)
+        _config->ensure_valid(_config->get_points());
     // don't recompute here as the value's about to be recomputed in the callee
     update_range();
 }
diff --git a/spline/spline.cpp b/spline/spline.cpp
index 9d783df6..f28cc98d 100644
--- a/spline/spline.cpp
+++ b/spline/spline.cpp
@@ -427,7 +427,18 @@ void spline::ensure_valid(const QList<QPointF>& the_points)
             }
             return false;
         );
-        if (!overlap)
+
+        const bool over_limit = progn(
+            bool ret = false;
+            if (pt.y() - 1e-2 > max_y)
+            {
+                pt.setY(max_y);
+                ret = true;
+            }
+            return ret;
+        );
+
+        if (!overlap && !over_limit)
             ret_list.push_back(pt);
     }
 
diff --git a/spline/spline.hpp b/spline/spline.hpp
index 328d1ece..cb2dc654 100644
--- a/spline/spline.hpp
+++ b/spline/spline.hpp
@@ -62,7 +62,7 @@ class OTR_SPLINE_EXPORT spline final
 
     MyMutex _mutex;
     QPointF last_input_value;
-    qreal max_x, max_y;
+    qreal max_x, max_y; // XXX TODO move to value<double> -sh 20171020
     bool activep;
     bool validp;