Add Rounding::at_least and Rounding::at_most

egui/src/widgets/color_picker.rs

@@ -90,13 +90,8 @@ fn color_button(ui: &mut Ui, color: Color32, open: bool) -> Response {
         ui.painter().rect_filled(left_half, 0.0, color);
         ui.painter().rect_filled(right_half, 0.0, color.to_opaque());
 
-        let rounding = Rounding {
-            nw: visuals.rounding.nw.at_most(2.0),
-            ne: visuals.rounding.ne.at_most(2.0),
-            sw: visuals.rounding.sw.at_most(2.0),
-            se: visuals.rounding.se.at_most(2.0),
-        };
 
+        let rounding = visuals.rounding.at_most(2.0);
         ui.painter()
             .rect_stroke(rect, rounding, (2.0, visuals.bg_fill)); // fill is intentional, because default style has no border
     }

epaint/src/shape.rs

@@ -535,6 +535,28 @@ impl Rounding {
     pub fn is_same(&self) -> bool {
         self.nw == self.ne && self.nw == self.sw && self.nw == self.se
     }
+
+    /// Make sure each corner has a rounding of at least this.
+    #[inline]
+    pub fn at_least(&self, min: f32) -> Self {
+        Self {
+            nw: self.nw.max(min),
+            ne: self.ne.max(min),
+            sw: self.sw.max(min),
+            se: self.se.max(min),
+        }
+    }
+
+    /// Make sure each corner has a rounding of at most this.
+    #[inline]
+    pub fn at_most(&self, max: f32) -> Self {
+        Self {
+            nw: self.nw.min(max),
+            ne: self.ne.min(max),
+            sw: self.sw.min(max),
+            se: self.se.min(max),
+        }
+    }
 }
 
 // ----------------------------------------------------------------------------

epaint/src/tessellator.rs

@@ -257,13 +257,7 @@ pub mod path {
         let half_width = rect.width() * 0.5;
         let half_height = rect.height() * 0.5;
         let max_cr = half_width.min(half_height);
-
-        Rounding {
-            nw: rounding.nw.at_most(max_cr).at_least(0.0),
-            ne: rounding.ne.at_most(max_cr).at_least(0.0),
-            sw: rounding.sw.at_most(max_cr).at_least(0.0),
-            se: rounding.se.at_most(max_cr).at_least(0.0),
-        }
+        rounding.at_most(max_cr).at_least(0.0)
     }
 }