3 files changed, 30 insertions, 8 deletions
diff --git a/native/src/renderer/debugger.rs b/native/src/renderer/debugger.rs
index 4cc50661..30f3d9a0 100644
--- a/native/src/renderer/debugger.rs
+++ b/native/src/renderer/debugger.rs
@@ -17,6 +17,7 @@ pub trait Debugger: super::Renderer {
     /// [`Element::explain`]: struct.Element.html#method.explain
     fn explain<Message>(
         &mut self,
+        defaults: &Self::Defaults,
         widget: &dyn Widget<Message, Self>,
         layout: Layout<'_>,
         cursor_position: Point,
diff --git a/native/src/renderer/null.rs b/native/src/renderer/null.rs
index 43076d61..96aa132c 100644
--- a/native/src/renderer/null.rs
+++ b/native/src/renderer/null.rs
@@ -1,20 +1,30 @@
 use crate::{
-    button, checkbox, column, radio, row, scrollable, text, text_input,
-    Background, Color, Element, Font, HorizontalAlignment, Layout, Point,
-    Rectangle, Renderer, Size, VerticalAlignment,
+    button, checkbox, column, radio, row, scrollable, text, text_input, Color,
+    Element, Font, HorizontalAlignment, Layout, Point, Rectangle, Renderer,
+    Size, VerticalAlignment,
 };
 
 /// A renderer that does nothing.
+///
+/// It can be useful if you are writing tests!
 #[derive(Debug, Clone, Copy)]
 pub struct Null;
 
+impl Null {
+    pub fn new() -> Null {
+        Null
+    }
+}
+
 impl Renderer for Null {
     type Output = ();
+    type Defaults = ();
 }
 
 impl column::Renderer for Null {
     fn draw<Message>(
         &mut self,
+        _defaults: &Self::Defaults,
         _content: &[Element<'_, Message, Self>],
         _layout: Layout<'_>,
         _cursor_position: Point,
@@ -25,6 +35,7 @@ impl column::Renderer for Null {
 impl row::Renderer for Null {
     fn draw<Message>(
         &mut self,
+        _defaults: &Self::Defaults,
         _content: &[Element<'_, Message, Self>],
         _layout: Layout<'_>,
         _cursor_position: Point,
@@ -49,6 +60,7 @@ impl text::Renderer for Null {
 
     fn draw(
         &mut self,
+        _defaults: &Self::Defaults,
         _bounds: Rectangle,
         _content: &str,
         _size: u16,
@@ -85,6 +97,8 @@ impl scrollable::Renderer for Null {
 }
 
 impl text_input::Renderer for Null {
+    type Style = ();
+
     fn default_size(&self) -> u16 {
         20
     }
@@ -112,19 +126,24 @@ impl text_input::Renderer for Null {
         _placeholder: &str,
         _value: &text_input::Value,
         _state: &text_input::State,
+        _style: &Self::Style,
     ) -> Self::Output {
     }
 }
 
 impl button::Renderer for Null {
-    fn draw(
+    type Style = ();
+
+    fn draw<Message>(
         &mut self,
+        _defaults: &Self::Defaults,
         _bounds: Rectangle,
         _cursor_position: Point,
+        _is_disabled: bool,
         _is_pressed: bool,
-        _background: Option<Background>,
-        _border_radius: u16,
-        _content: Self::Output,
+        _style: &Self::Style,
+        _content: &Element<'_, Message, Self>,
+        _content_layout: Layout<'_>,
     ) -> Self::Output {
     }
 }
diff --git a/native/src/renderer/windowed.rs b/native/src/renderer/windowed.rs
index 813a03f2..c3266e6c 100644
--- a/native/src/renderer/windowed.rs
+++ b/native/src/renderer/windowed.rs
@@ -4,13 +4,15 @@ use raw_window_handle::HasRawWindowHandle;
 
 /// A renderer that can target windows.
 pub trait Windowed: super::Renderer + Sized {
+    type Settings: Default;
+
     /// The type of target.
     type Target: Target<Renderer = Self>;
 
     /// Creates a new [`Windowed`] renderer.
     ///
     /// [`Windowed`]: trait.Windowed.html
-    fn new() -> Self;
+    fn new(settings: Self::Settings) -> Self;
 
     /// Performs the drawing operations described in the output on the given
     /// target.