Add example images to widget docs

src/widget/button.rs

@@ -36,6 +36,8 @@ use std::hash::Hash;
 /// Button::new(state, "Click me!")
 ///     .on_press(Message::ButtonClicked);
 /// ```
+///
+/// ![Button drawn by Coffee's renderer](https://github.com/hecrj/coffee/blob/bda9818f823dfcb8a7ad0ff4940b4d4b387b5208/images/ui/button.png?raw=true)
 pub struct Button<'a, Message> {
     state: &'a mut State,
     label: String,

src/widget/checkbox.rs

@@ -24,24 +24,19 @@ use crate::{
 /// #[derive(Debug, Clone, Copy)]
 /// pub enum Color {
 ///     Black,
-///     White,
-/// }
-///
-/// impl Default for Color {
-///     fn default() -> Color {
-///         Color::Black
-///     }
 /// }
 ///
 /// pub enum Message {
 ///     CheckboxToggled(bool),
 /// }
 ///
-/// fn some_checkbox(is_checked: bool) -> Checkbox<Color, Message> {
+/// let is_checked = true;
-///     Checkbox::new(is_checked, "Toggle me!", Message::CheckboxToggled)
+///
-///         .label_color(Color::White)
+/// Checkbox::new(is_checked, "Toggle me!", Message::CheckboxToggled)
-/// }
+///     .label_color(Color::Black);
 /// ```
+///
+/// ![Checkbox drawn by Coffee's renderer](https://github.com/hecrj/coffee/blob/bda9818f823dfcb8a7ad0ff4940b4d4b387b5208/images/ui/checkbox.png?raw=true)
 pub struct Checkbox<Color, Message> {
     is_checked: bool,
     on_toggle: Box<dyn Fn(bool) -> Message>,
@@ -98,7 +93,7 @@ impl<Color, Message> Checkbox<Color, Message> {
 impl<Color, Message, Renderer> Widget<Message, Renderer>
     for Checkbox<Color, Message>
 where
-    Color: 'static + Copy + Default + std::fmt::Debug,
+    Color: 'static + Copy + std::fmt::Debug,
     Renderer: self::Renderer + text::Renderer<Color>,
 {
     fn node(&self, renderer: &Renderer) -> Node {

src/widget/radio.rs

@@ -25,12 +25,6 @@ use std::hash::Hash;
 ///     Black,
 /// }
 ///
-/// impl Default for Color {
-///     fn default() -> Color {
-///         Color::Black
-///     }
-/// }
-///
 /// #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 /// pub enum Choice {
 ///     A,
@@ -44,11 +38,14 @@ use std::hash::Hash;
 ///
 /// let selected_choice = Some(Choice::A);
 ///
-/// Radio::<Color, Message>::new(Choice::A, "This is A", selected_choice, Message::RadioSelected)
+/// Radio::new(Choice::A, "This is A", selected_choice, Message::RadioSelected)
+///     .label_color(Color::Black);
+///
+/// Radio::new(Choice::B, "This is B", selected_choice, Message::RadioSelected)
 ///     .label_color(Color::Black);
 /// ```
 ///
-/// ![Checkbox drawn by the built-in renderer in Coffee](https://github.com/hecrj/coffee/blob/bda9818f823dfcb8a7ad0ff4940b4d4b387b5208/images/ui/radio.png?raw=true)
+/// ![Radio buttons drawn by Coffee's renderer](https://github.com/hecrj/coffee/blob/bda9818f823dfcb8a7ad0ff4940b4d4b387b5208/images/ui/radio.png?raw=true)
 pub struct Radio<Color, Message> {
     is_selected: bool,
     on_click: Message,
@@ -108,7 +105,7 @@ impl<Color, Message> Radio<Color, Message> {
 impl<Color, Message, Renderer> Widget<Message, Renderer>
     for Radio<Color, Message>
 where
-    Color: 'static + Copy + Default + std::fmt::Debug,
+    Color: 'static + Copy + std::fmt::Debug,
     Renderer: self::Renderer + text::Renderer<Color>,
     Message: Copy + std::fmt::Debug,
 {
@@ -205,7 +202,7 @@ pub trait Renderer {
 impl<'a, Color, Message, Renderer> From<Radio<Color, Message>>
     for Element<'a, Message, Renderer>
 where
-    Color: 'static + Copy + Default + std::fmt::Debug,
+    Color: 'static + Copy + std::fmt::Debug,
     Renderer: self::Renderer + text::Renderer<Color>,
     Message: 'static + Copy + std::fmt::Debug,
 {

src/widget/slider.rs

@@ -38,6 +38,8 @@ use crate::{
 ///
 /// Slider::new(state, 0.0..=100.0, value, Message::SliderChanged);
 /// ```
+///
+/// ![Slider drawn by Coffee's renderer](https://github.com/hecrj/coffee/blob/bda9818f823dfcb8a7ad0ff4940b4d4b387b5208/images/ui/slider.png?raw=true)
 pub struct Slider<'a, Message> {
     state: &'a mut State,
     range: RangeInclusive<f32>,

src/widget/text.rs

@@ -18,9 +18,14 @@ use std::hash::Hash;
 /// ```
 /// use iced::Text;
 ///
-/// Text::<(f32, f32, f32)>::new("I <3 iced!")
+/// #[derive(Debug, Clone, Copy)]
+/// pub enum Color {
+///     Black,
+/// }
+///
+/// Text::new("I <3 iced!")
 ///     .size(40)
-///     .color((0.0, 0.0, 1.0));
+///     .color(Color::Black);
 /// ```
 #[derive(Debug, Clone)]
 pub struct Text<Color> {