2 files changed, 8 insertions, 7 deletions
diff --git a/spline-widget/spline-widget.cpp b/spline-widget/spline-widget.cpp
index 6e3a95b3..ff18a2f9 100644
--- a/spline-widget/spline-widget.cpp
+++ b/spline-widget/spline-widget.cpp
@@ -19,9 +19,9 @@
 spline_widget::spline_widget(QWidget *parent) :
     QWidget(parent),
     _config(nullptr),
-    moving_control_point_idx(-1),
     snap_x(0),
     snap_y(0),
+    moving_control_point_idx(-1),
     _draw_function(true),
     _preview_only(false)
 {
@@ -472,10 +472,12 @@ QPointF spline_widget::pixel_coord_to_point(const QPointF& point)
     qreal x = round((point.x() - pixel_bounds.x()) / c.x());
     qreal y = round((pixel_bounds.height() - point.y() + pixel_bounds.y()) / c.y());
 
+    const volatile int c = 8192;
+
     if (snap_x > 0)
-        x -= int(x) % snap_x;
+        x = std::nearbyint(x * c - (int(x * c) % int(snap_x * c))) / double(c);
     if (snap_y > 0)
-        y -= int(y) % snap_y;
+        y = std::nearbyint(y * c - (int(y * c) % int(snap_y * c))) / double(c);
 
     if (x < 0)
         x = 0;
diff --git a/spline-widget/spline-widget.hpp b/spline-widget/spline-widget.hpp
index 80397ac7..94e6b32c 100644
--- a/spline-widget/spline-widget.hpp
+++ b/spline-widget/spline-widget.hpp
@@ -53,8 +53,8 @@ public:
     }
     void set_preview_only(bool val);
     bool is_preview_only() const;
-    void set_snap(int x, int y) { snap_x = x; snap_y = y; }
-    void get_snap(int& x, int& y) const { x = snap_x; y = snap_y; }
+    void set_snap(double x, double y) { snap_x = x; snap_y = y; }
+    void get_snap(double& x, double& y) const { x = snap_x; y = snap_y; }
 protected slots:
     void paintEvent(QPaintEvent *e) override;
     void mousePressEvent(QMouseEvent *e) override;
@@ -89,9 +89,8 @@ private:
 
     QMetaObject::Connection connection;
 
+    double snap_x, snap_y;
     int moving_control_point_idx;
-
-    int snap_x, snap_y;
     bool _draw_function, _preview_only;
 
     static constexpr int line_length_pixels = 3;