Pass a closure to provide styling to Select

This lets us obtain a new style when refreshing the theme.

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

gpui/src/views/select.rs

@@ -10,7 +10,7 @@ pub struct Select {
     item_count: usize,
     is_open: bool,
     list_state: UniformListState,
-    style: SelectStyle,
+    build_style: Option<Box<dyn FnMut(&mut MutableAppContext) -> SelectStyle>>,
 }
 
 #[derive(Clone, Default)]
@@ -48,12 +48,15 @@ impl Select {
             item_count,
             is_open: false,
             list_state: UniformListState::default(),
-            style: Default::default(),
+            build_style: Default::default(),
         }
     }
 
-    pub fn with_style(mut self, style: &SelectStyle) -> Self {
-        self.style = style.clone();
+    pub fn with_style(
+        mut self,
+        f: impl 'static + FnMut(&mut MutableAppContext) -> SelectStyle,
+    ) -> Self {
+        self.build_style = Some(Box::new(f));
         self
     }
 
@@ -91,6 +94,11 @@ impl View for Select {
         enum Header {}
         enum Item {}
 
+        let style = if let Some(build_style) = self.build_style.as_mut() {
+            (build_style)(cx)
+        } else {
+            Default::default()
+        };
         let mut result = Flex::column().with_child(
             MouseEventHandler::new::<Header, _, _, _>(self.handle.id(), cx, |mouse_state, cx| {
                 Container::new((self.render_item)(
@@ -99,7 +107,7 @@ impl View for Select {
                     mouse_state.hovered,
                     cx,
                 ))
-                .with_style(&self.style.header)
+                .with_style(&style.header)
                 .boxed()
             })
             .on_click(move |cx| cx.dispatch_action(ToggleSelect))
@@ -146,7 +154,7 @@ impl View for Select {
                         .with_max_height(200.)
                         .boxed(),
                     )
-                    .with_style(&self.style.menu)
+                    .with_style(&style.menu)
                     .boxed(),
                 )
                 .boxed(),

zed/src/chat_panel.rs

@@ -46,7 +46,6 @@ impl ChatPanel {
         let input_editor = cx.add_view(|cx| Editor::auto_height(settings.clone(), cx));
         let channel_select = cx.add_view(|cx| {
             let channel_list = channel_list.clone();
-            let theme = &settings.borrow().theme.chat_panel.channel_select;
             Select::new(0, cx, {
                 let settings = settings.clone();
                 move |ix, item_type, is_hovered, cx| {
@@ -60,9 +59,15 @@ impl ChatPanel {
                     )
                 }
             })
-            .with_style(&SelectStyle {
-                header: theme.header.container.clone(),
-                menu: theme.menu.clone(),
+            .with_style({
+                let settings = settings.clone();
+                move |_| {
+                    let theme = &settings.borrow().theme.chat_panel.channel_select;
+                    SelectStyle {
+                        header: theme.header.container.clone(),
+                        menu: theme.menu.clone(),
+                    }
+                }
             })
         });
         let mut this = Self {