implement animation::Interpolable for Border and Radius

core/src/border.rs

@@ -1,5 +1,5 @@
 //! Draw lines around containers.
-use crate::{Color, Pixels};
+use crate::{Color, Pixels, animation::Interpolable};
 
 /// A border.
 #[derive(Debug, Clone, Copy, PartialEq, Default)]
@@ -75,6 +75,16 @@ impl Border {
     }
 }
 
+impl Interpolable for Border {
+    fn interpolated(&self, other: Self, ratio: f32) -> Self {
+        Self {
+            color: self.color.interpolated(other.color, ratio),
+            width: self.width.interpolated(other.width, ratio),
+            radius: self.radius.interpolated(other.radius, ratio),
+        }
+    }
+}
+
 /// The border radii for the corners of a graphics primitive in the order:
 /// top-left, top-right, bottom-right, bottom-left.
 #[derive(Debug, Clone, Copy, PartialEq, Default)]
@@ -224,6 +234,17 @@ impl Radius {
     }
 }
 
+impl Interpolable for Radius {
+    fn interpolated(&self, other: Self, ratio: f32) -> Self {
+        Self {
+            top_left: self.top_left.interpolated(other.top_left, ratio),
+            top_right: self.top_right.interpolated(other.top_right, ratio),
+            bottom_left: self.bottom_left.interpolated(other.bottom_left, ratio),
+            bottom_right: self.bottom_right.interpolated(other.bottom_right, ratio),
+        }
+    }
+}
+
 impl From<f32> for Radius {
     fn from(radius: f32) -> Self {
         Self {