From f064f0482b653a1fbee4afbddcecf91e3a399004 Mon Sep 17 00:00:00 2001
From: Héctor Ramón Jiménez <hector0193@gmail.com>
Date: Thu, 16 Apr 2020 13:22:00 +0200
Subject: Introduce `Layer` trait

---
 native/src/widget/column.rs    | 15 +++++++++++++--
 native/src/widget/container.rs | 11 +++++++++--
 2 files changed, 22 insertions(+), 4 deletions(-)

(limited to 'native/src/widget')

diff --git a/native/src/widget/column.rs b/native/src/widget/column.rs
index 6afc94d6..9a6dbdb3 100644
--- a/native/src/widget/column.rs
+++ b/native/src/widget/column.rs
@@ -2,8 +2,8 @@
 use std::hash::Hash;
 
 use crate::{
-    layout, Align, Clipboard, Element, Event, Hasher, Layout, Length, Point,
-    Widget,
+    layout, Align, Clipboard, Element, Event, Hasher, Layout, Length, Overlay,
+    Point, Widget,
 };
 
 use std::u32;
@@ -204,6 +204,17 @@ where
             child.widget.hash_layout(state);
         }
     }
+
+    fn overlay(
+        &mut self,
+        layout: Layout<'_>,
+    ) -> Option<Overlay<'a, Message, Renderer>> {
+        self.children
+            .iter_mut()
+            .zip(layout.children())
+            .filter_map(|(child, layout)| child.widget.overlay(layout))
+            .next()
+    }
 }
 
 /// The renderer of a [`Column`].
diff --git a/native/src/widget/container.rs b/native/src/widget/container.rs
index 3ad12eeb..3bdb1a27 100644
--- a/native/src/widget/container.rs
+++ b/native/src/widget/container.rs
@@ -2,8 +2,8 @@
 use std::hash::Hash;
 
 use crate::{
-    layout, Align, Clipboard, Element, Event, Hasher, Layout, Length, Point,
-    Rectangle, Widget,
+    layout, Align, Clipboard, Element, Event, Hasher, Layout, Length, Overlay,
+    Point, Rectangle, Widget,
 };
 
 use std::u32;
@@ -214,6 +214,13 @@ where
 
         self.content.hash_layout(state);
     }
+
+    fn overlay(
+        &mut self,
+        layout: Layout<'_>,
+    ) -> Option<Overlay<'a, Message, Renderer>> {
+        self.content.overlay(layout.children().next().unwrap())
+    }
 }
 
 /// The renderer of a [`Container`].
-- 
cgit