Introduce `Shell` type in `iced_native`

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

1 files changed, 4 insertions, 4 deletions

diff --git a/native/src/widget/slider.rs b/native/src/widget/slider.rs
index 3ce53f6c..65632a5c 100644
--- a/native/src/widget/slider.rs
+++ b/native/src/widget/slider.rs
@@ -8,7 +8,7 @@ use crate::renderer;
 use crate::touch;
 use crate::{
     Background, Clipboard, Color, Element, Hasher, Layout, Length, Point,
-    Rectangle, Size, Widget,
+    Rectangle, Shell, Size, Widget,
 };
 
 use std::hash::Hash;
@@ -191,7 +191,7 @@ where
         cursor_position: Point,
         _renderer: &Renderer,
         _clipboard: &mut dyn Clipboard,
-        messages: &mut Vec<Message>,
+        shell: &mut Shell<'_, Message>,
     ) -> event::Status {
         let is_dragging = self.state.is_dragging;
 
@@ -220,7 +220,7 @@ where
             };
 
             if (self.value.into() - new_value.into()).abs() > f64::EPSILON {
-                messages.push((self.on_change)(new_value));
+                shell.publish((self.on_change)(new_value));
 
                 self.value = new_value;
             }
@@ -241,7 +241,7 @@ where
             | Event::Touch(touch::Event::FingerLost { .. }) => {
                 if is_dragging {
                     if let Some(on_release) = self.on_release.clone() {
-                        messages.push(on_release);
+                        shell.publish(on_release);
                     }
                     self.state.is_dragging = false;