spline: set minimum size hint

2 files changed, 20 insertions, 1 deletions

diff --git a/spline/spline-widget.cpp b/spline/spline-widget.cpp
index d329d8e2..363720c8 100644
--- a/spline/spline-widget.cpp
+++ b/spline/spline-widget.cpp
@@ -260,6 +260,21 @@ void spline_widget::drawFunction()
     }
 }
 
+double spline_widget::screen_dpi() const
+{
+#ifdef _WIN32
+    return std::max(devicePixelRatioF, 1.);
+#else
+    return std::max(std::max(logicalDpiX()/(double)physicalDpiX(), devicePixelRatioF()), 1.);
+#endif
+}
+
+QSize spline_widget::minimumSizeHint() const
+{
+    const double dpi = screen_dpi();
+    return { iround(800 * dpi), iround(250 * dpi) };
+}
+
 void spline_widget::paintEvent(QPaintEvent *e)
 {
     if (!config)
diff --git a/spline/spline-widget.hpp b/spline/spline-widget.hpp
index 178e5b23..ab0060f2 100644
--- a/spline/spline-widget.hpp
+++ b/spline/spline-widget.hpp
@@ -54,6 +54,8 @@ public:
 
     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; }
+
+    QSize minimumSizeHint() const override;
 public slots:
     void reload_spline();
 protected slots:
@@ -79,6 +81,8 @@ private:
     void update_range();
     void changeEvent(QEvent* e) override;
 
+    double screen_dpi() const;
+
     QPointF pixel_to_point(const QPointF& point);
     QPointF point_to_pixel(const QPointF& point);
 
@@ -105,7 +109,7 @@ private:
     // point's circle radius on the widget
     static constexpr int point_size_in_pixels_ = 4;
 
-    const double point_size_in_pixels = point_size_in_pixels_ * std::fmax(1, devicePixelRatioF() * .66);
+    const double point_size_in_pixels = point_size_in_pixels_ * screen_dpi();
 };
 
 } // ns spline_detail