Introduce `Shell` type in `iced_native`

Widgets now can invalidate the current layout of the application on demand.

2 files changed, 10 insertions, 8 deletions

diff --git a/native/src/widget/pane_grid/content.rs b/native/src/widget/pane_grid/content.rs
index c44506dd..533827b7 100644
--- a/native/src/widget/pane_grid/content.rs
+++ b/native/src/widget/pane_grid/content.rs
@@ -5,7 +5,9 @@ use crate::overlay;
 use crate::renderer;
 use crate::widget::container;
 use crate::widget::pane_grid::TitleBar;
-use crate::{Clipboard, Element, Hasher, Layout, Point, Rectangle, Size};
+use crate::{
+    Clipboard, Element, Hasher, Layout, Point, Rectangle, Shell, Size,
+};
 
 /// The content of a [`Pane`].
 ///
@@ -160,7 +162,7 @@ where
         cursor_position: Point,
         renderer: &Renderer,
         clipboard: &mut dyn Clipboard,
-        messages: &mut Vec<Message>,
+        shell: &mut Shell<'_, Message>,
         is_picked: bool,
     ) -> event::Status {
         let mut event_status = event::Status::Ignored;
@@ -174,7 +176,7 @@ where
                 cursor_position,
                 renderer,
                 clipboard,
-                messages,
+                shell,
             );
 
             children.next().unwrap()
@@ -191,7 +193,7 @@ where
                 cursor_position,
                 renderer,
                 clipboard,
-                messages,
+                shell,
             )
         };
 
diff --git a/native/src/widget/pane_grid/title_bar.rs b/native/src/widget/pane_grid/title_bar.rs
index 070cf404..353e1ce9 100644
--- a/native/src/widget/pane_grid/title_bar.rs
+++ b/native/src/widget/pane_grid/title_bar.rs
@@ -5,7 +5,7 @@ use crate::overlay;
 use crate::renderer;
 use crate::widget::container;
 use crate::{
-    Clipboard, Element, Hasher, Layout, Padding, Point, Rectangle, Size,
+    Clipboard, Element, Hasher, Layout, Padding, Point, Rectangle, Shell, Size,
 };
 
 /// The title bar of a [`Pane`].
@@ -218,7 +218,7 @@ where
         cursor_position: Point,
         renderer: &Renderer,
         clipboard: &mut dyn Clipboard,
-        messages: &mut Vec<Message>,
+        shell: &mut Shell<'_, Message>,
     ) -> event::Status {
         let mut children = layout.children();
         let padded = children.next().unwrap();
@@ -235,7 +235,7 @@ where
                 cursor_position,
                 renderer,
                 clipboard,
-                messages,
+                shell,
             )
         } else {
             event::Status::Ignored
@@ -247,7 +247,7 @@ where
             cursor_position,
             renderer,
             clipboard,
-            messages,
+            shell,
         );
 
         control_status.merge(title_status)