Draft float widget and simplify image again 🎉

core/src/element.rs

@@ -366,7 +366,7 @@ where
     fn overlay<'b>(
         &'b mut self,
         tree: &'b mut Tree,
-        layout: Layout<'_>,
+        layout: Layout<'b>,
         renderer: &Renderer,
         viewport: &Rectangle,
         translation: Vector,
@@ -518,7 +518,7 @@ where
     fn overlay<'b>(
         &'b mut self,
         state: &'b mut Tree,
-        layout: Layout<'_>,
+        layout: Layout<'b>,
         renderer: &Renderer,
         viewport: &Rectangle,
         translation: Vector,

core/src/overlay.rs

@@ -120,7 +120,7 @@ where
 pub fn from_children<'a, Message, Theme, Renderer>(
     children: &'a mut [crate::Element<'_, Message, Theme, Renderer>],
     tree: &'a mut Tree,
-    layout: Layout<'_>,
+    layout: Layout<'a>,
     renderer: &Renderer,
     viewport: &Rectangle,
     translation: Vector,

core/src/transformation.rs

@@ -40,6 +40,11 @@ impl Transformation {
     pub fn translation(&self) -> Vector {
         Vector::new(self.0.w_axis.x, self.0.w_axis.y)
     }
+
+    /// Returns the inverse of the [`Transformation`].
+    pub fn inverse(self) -> Self {
+        Transformation(self.0.inverse())
+    }
 }
 
 impl Default for Transformation {

core/src/widget.rs

@@ -144,7 +144,7 @@ where
     fn overlay<'a>(
         &'a mut self,
         _state: &'a mut Tree,
-        _layout: Layout<'_>,
+        _layout: Layout<'a>,
         _renderer: &Renderer,
         _viewport: &Rectangle,
         _translation: Vector,