Unify web and ggez tour examples 🎉

src/widget/button.rs

@@ -133,7 +133,7 @@ where
     Renderer: self::Renderer,
     Message: Copy + std::fmt::Debug,
 {
-    fn node(&self, _renderer: &Renderer) -> Node {
+    fn node(&self, _renderer: &mut Renderer) -> Node {
         Node::new(self.style.height(50))
     }
 

src/widget/checkbox.rs

@@ -98,7 +98,7 @@ where
     Color: 'static + Copy + std::fmt::Debug,
     Renderer: self::Renderer + text::Renderer<Color>,
 {
-    fn node(&self, renderer: &Renderer) -> Node {
+    fn node(&self, renderer: &mut Renderer) -> Node {
         Row::<(), Renderer>::new()
             .spacing(15)
             .align_items(Align::Center)

src/widget/column.rs

@@ -136,7 +136,7 @@ impl<'a, Message, Renderer> Column<'a, Message, Renderer> {
 impl<'a, Message, Renderer> Widget<Message, Renderer>
     for Column<'a, Message, Renderer>
 {
-    fn node(&self, renderer: &Renderer) -> Node {
+    fn node(&self, renderer: &mut Renderer) -> Node {
         let mut children: Vec<Node> = self
             .children
             .iter()

src/widget/image.rs

@@ -99,7 +99,7 @@ where
     Renderer: self::Renderer<I>,
     I: Clone,
 {
-    fn node(&self, renderer: &Renderer) -> Node {
+    fn node(&self, renderer: &mut Renderer) -> Node {
         renderer.node(
             self.style,
             &self.image,
@@ -144,7 +144,7 @@ pub trait Renderer<I> {
     /// [`Style`]: ../../struct.Style.html
     /// [`Image`]: struct.Image.html
     fn node(
-        &self,
+        &mut self,
         style: Style,
         image: &I,
         width: Option<u16>,

src/widget/radio.rs

@@ -111,7 +111,7 @@ where
     Renderer: self::Renderer + text::Renderer<Color>,
     Message: Copy + std::fmt::Debug,
 {
-    fn node(&self, renderer: &Renderer) -> Node {
+    fn node(&self, renderer: &mut Renderer) -> Node {
         Row::<(), Renderer>::new()
             .spacing(15)
             .align_items(Align::Center)

src/widget/row.rs

@@ -133,7 +133,7 @@ impl<'a, Message, Renderer> Row<'a, Message, Renderer> {
 impl<'a, Message, Renderer> Widget<Message, Renderer>
     for Row<'a, Message, Renderer>
 {
-    fn node(&self, renderer: &Renderer) -> Node {
+    fn node(&self, renderer: &mut Renderer) -> Node {
         let mut children: Vec<Node> = self
             .children
             .iter()

src/widget/slider.rs

@@ -107,7 +107,7 @@ impl<'a, Message, Renderer> Widget<Message, Renderer> for Slider<'a, Message>
 where
     Renderer: self::Renderer,
 {
-    fn node(&self, _renderer: &Renderer) -> Node {
+    fn node(&self, _renderer: &mut Renderer) -> Node {
         Node::new(self.style.height(25))
     }
 

src/widget/text.rs

@@ -113,7 +113,7 @@ where
     Color: Copy + std::fmt::Debug,
     Renderer: self::Renderer<Color>,
 {
-    fn node(&self, renderer: &Renderer) -> Node {
+    fn node(&self, renderer: &mut Renderer) -> Node {
         renderer.node(self.style, &self.content, self.size)
     }