Fix missing reactive rendering logic for vertical_slider

widget/src/vertical_slider.rs

@@ -42,6 +42,7 @@ use crate::core::mouse;
 use crate::core::renderer;
 use crate::core::touch;
 use crate::core::widget::tree::{self, Tree};
+use crate::core::window;
 use crate::core::{
     self, Clipboard, Element, Event, Length, Pixels, Point, Rectangle, Shell,
     Size, Widget,
@@ -98,6 +99,7 @@ where
     width: f32,
     height: Length,
     class: Theme::Class<'a>,
+    status: Option<Status>,
 }
 
 impl<'a, T, Message, Theme> VerticalSlider<'a, T, Message, Theme>
@@ -144,6 +146,7 @@ where
             width: Self::DEFAULT_WIDTH,
             height: Length::Fill,
             class: Theme::default(),
+            status: None,
         }
     }
 
@@ -390,7 +393,9 @@ where
                     shell.capture_event();
                 }
             }
-            Event::Keyboard(keyboard::Event::KeyPressed { key, .. }) => {
+            Event::Keyboard(keyboard::Event::KeyPressed {
+                ref key, ..
+            }) => {
                 if cursor.is_over(layout.bounds()) {
                     match key {
                         Key::Named(key::Named::ArrowUp) => {
@@ -410,32 +415,36 @@ where
             }
             _ => {}
         }
+
+        let current_status = if state.is_dragging {
+            Status::Dragged
+        } else if cursor.is_over(layout.bounds()) {
+            Status::Hovered
+        } else {
+            Status::Active
+        };
+
+        if let Event::Window(window::Event::RedrawRequested(_now)) = event {
+            self.status = Some(current_status);
+        } else if self.status.is_some_and(|status| status != current_status) {
+            shell.request_redraw();
+        }
     }
 
     fn draw(
         &self,
-        tree: &Tree,
+        _tree: &Tree,
         renderer: &mut Renderer,
         theme: &Theme,
         _style: &renderer::Style,
         layout: Layout<'_>,
-        cursor: mouse::Cursor,
+        _cursor: mouse::Cursor,
         _viewport: &Rectangle,
     ) {
-        let state = tree.state.downcast_ref::<State>();
         let bounds = layout.bounds();
-        let is_mouse_over = cursor.is_over(bounds);
 
-        let style = theme.style(
-            &self.class,
-            if state.is_dragging {
-                Status::Dragged
-            } else if is_mouse_over {
-                Status::Hovered
-            } else {
-                Status::Active
-            },
-        );
+        let style =
+            theme.style(&self.class, self.status.unwrap_or(Status::Active));
 
         let (handle_width, handle_height, handle_border_radius) =
             match style.handle.shape {