Make shadow optional in renderer::Quad

core/src/renderer.rs

@@ -5,7 +5,7 @@ mod null;
 #[cfg(debug_assertions)]
 pub use null::Null;
 
-use crate::{Background, BorderRadius, Color, Rectangle, Shadow, Vector};
+use crate::{Background, BorderRadius, Color, Rectangle, Shadow, Size, Vector};
 
 /// A component that can be used by widgets to draw themselves on a screen.
 pub trait Renderer: Sized {
@@ -47,7 +47,19 @@ pub struct Quad {
     pub border_color: Color,
 
     /// The shadow of the [`Quad`].
-    pub shadow: Shadow,
+    pub shadow: Option<Shadow>,
+}
+
+impl Default for Quad {
+    fn default() -> Self {
+        Self {
+            bounds: Rectangle::with_size(Size::ZERO),
+            border_radius: 0.0.into(),
+            border_width: 0.0,
+            border_color: Color::TRANSPARENT,
+            shadow: None,
+        }
+    }
 }
 
 /// The styling attributes of a [`Renderer`].

core/src/shadow.rs

@@ -2,7 +2,7 @@
 use crate::{Color, Vector};
 
 /// A shadow
-#[derive(Debug, Clone, Copy, PartialEq, Default)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Shadow {
     /// The color of the shadow
     pub color: Color,
@@ -10,6 +10,6 @@ pub struct Shadow {
     /// The offset of the shadow
     pub offset: Vector,
 
-    /// The blur_radius of the shadow
+    /// The blur radius of the shadow
     pub blur_radius: f32,
 }