9 files changed, 18 insertions, 21 deletions
diff --git a/pure/src/overlay.rs b/pure/src/overlay.rs
index b009fde8..72415634 100644
--- a/pure/src/overlay.rs
+++ b/pure/src/overlay.rs
@@ -5,17 +5,17 @@ use iced_native::Layout;
 pub use iced_native::overlay::*;
 
 pub fn from_children<'a, Message, Renderer>(
-    children: &'a mut [crate::Element<'_, Message, Renderer>],
+    children: &'a [crate::Element<'_, Message, Renderer>],
     tree: &'a mut Tree,
     layout: Layout<'_>,
     renderer: &Renderer,
 ) -> Option<Element<'a, Message, Renderer>> {
     children
-        .iter_mut()
+        .iter()
         .zip(&mut tree.children)
         .zip(layout.children())
         .filter_map(|((child, state), layout)| {
-            child.as_widget_mut().overlay(state, layout, renderer)
+            child.as_widget().overlay(state, layout, renderer)
         })
         .next()
 }
diff --git a/pure/src/widget.rs b/pure/src/widget.rs
index 62f9d95b..a12d6fad 100644
--- a/pure/src/widget.rs
+++ b/pure/src/widget.rs
@@ -1,4 +1,5 @@
 pub mod image;
+pub mod tree;
 
 mod button;
 mod checkbox;
@@ -14,7 +15,6 @@ mod space;
 mod text;
 mod text_input;
 mod toggler;
-mod tree;
 
 pub use button::Button;
 pub use checkbox::Checkbox;
@@ -104,7 +104,7 @@ pub trait Widget<Message, Renderer> {
     }
 
     fn overlay<'a>(
-        &'a mut self,
+        &'a self,
         _state: &'a mut Tree,
         _layout: Layout<'_>,
         _renderer: &Renderer,
diff --git a/pure/src/widget/button.rs b/pure/src/widget/button.rs
index f5e78933..2ed67a9c 100644
--- a/pure/src/widget/button.rs
+++ b/pure/src/widget/button.rs
@@ -209,12 +209,12 @@ where
     }
 
     fn overlay<'b>(
-        &'b mut self,
+        &'b self,
         tree: &'b mut Tree,
         layout: Layout<'_>,
         renderer: &Renderer,
     ) -> Option<overlay::Element<'b, Message, Renderer>> {
-        self.content.as_widget_mut().overlay(
+        self.content.as_widget().overlay(
             &mut tree.children[0],
             layout.children().next().unwrap(),
             renderer,
diff --git a/pure/src/widget/column.rs b/pure/src/widget/column.rs
index 1f025335..698d7e9c 100644
--- a/pure/src/widget/column.rs
+++ b/pure/src/widget/column.rs
@@ -219,12 +219,12 @@ where
     }
 
     fn overlay<'b>(
-        &'b mut self,
+        &'b self,
         tree: &'b mut Tree,
         layout: Layout<'_>,
         renderer: &Renderer,
     ) -> Option<overlay::Element<'b, Message, Renderer>> {
-        overlay::from_children(&mut self.children, tree, layout, renderer)
+        overlay::from_children(&self.children, tree, layout, renderer)
     }
 }
 
diff --git a/pure/src/widget/container.rs b/pure/src/widget/container.rs
index 8ad6a064..c8f0b3a2 100644
--- a/pure/src/widget/container.rs
+++ b/pure/src/widget/container.rs
@@ -240,12 +240,12 @@ where
     }
 
     fn overlay<'b>(
-        &'b mut self,
+        &'b self,
         tree: &'b mut Tree,
         layout: Layout<'_>,
         renderer: &Renderer,
     ) -> Option<overlay::Element<'b, Message, Renderer>> {
-        self.content.as_widget_mut().overlay(
+        self.content.as_widget().overlay(
             &mut tree.children[0],
             layout.children().next().unwrap(),
             renderer,
diff --git a/pure/src/widget/pick_list.rs b/pure/src/widget/pick_list.rs
index 324950e1..9dc847ee 100644
--- a/pure/src/widget/pick_list.rs
+++ b/pure/src/widget/pick_list.rs
@@ -212,7 +212,7 @@ where
     }
 
     fn overlay<'b>(
-        &'b mut self,
+        &'b self,
         tree: &'b mut Tree,
         layout: Layout<'_>,
         _renderer: &Renderer,
diff --git a/pure/src/widget/row.rs b/pure/src/widget/row.rs
index 29128589..1c574d51 100644
--- a/pure/src/widget/row.rs
+++ b/pure/src/widget/row.rs
@@ -205,12 +205,12 @@ where
     }
 
     fn overlay<'b>(
-        &'b mut self,
+        &'b self,
         tree: &'b mut Tree,
         layout: Layout<'_>,
         renderer: &Renderer,
     ) -> Option<overlay::Element<'b, Message, Renderer>> {
-        overlay::from_children(&mut self.children, tree, layout, renderer)
+        overlay::from_children(&self.children, tree, layout, renderer)
     }
 }
 
diff --git a/pure/src/widget/scrollable.rs b/pure/src/widget/scrollable.rs
index 8a206a6c..bbda50e5 100644
--- a/pure/src/widget/scrollable.rs
+++ b/pure/src/widget/scrollable.rs
@@ -233,13 +233,13 @@ where
     }
 
     fn overlay<'b>(
-        &'b mut self,
+        &'b self,
         tree: &'b mut Tree,
         layout: Layout<'_>,
         renderer: &Renderer,
     ) -> Option<overlay::Element<'b, Message, Renderer>> {
         self.content
-            .as_widget_mut()
+            .as_widget()
             .overlay(
                 &mut tree.children[0],
                 layout.children().next().unwrap(),
diff --git a/pure/src/widget/space.rs b/pure/src/widget/space.rs
index d7394398..e0c9c285 100644
--- a/pure/src/widget/space.rs
+++ b/pure/src/widget/space.rs
@@ -4,15 +4,13 @@ use iced_native::event::{self, Event};
 use iced_native::layout::{self, Layout};
 use iced_native::mouse;
 use iced_native::renderer;
-use iced_native::text;
 use iced_native::{Clipboard, Hasher, Length, Point, Rectangle, Shell};
 
 pub use iced_native::widget::Space;
 
 impl<'a, Message, Renderer> Widget<Message, Renderer> for Space
 where
-    Message: Clone,
-    Renderer: text::Renderer,
+    Renderer: iced_native::Renderer,
 {
     fn width(&self) -> Length {
         <Self as iced_native::Widget<Message, Renderer>>::width(self)
@@ -98,8 +96,7 @@ where
 
 impl<'a, Message, Renderer> Into<Element<'a, Message, Renderer>> for Space
 where
-    Message: 'a + Clone,
-    Renderer: text::Renderer + 'a,
+    Renderer: iced_native::Renderer + 'a,
 {
     fn into(self) -> Element<'a, Message, Renderer> {
         Element::new(self)