Add ability to toggle user settings

crates/ui2/src/settings.rs

@@ -1,7 +1,9 @@
 use std::ops::Deref;
+use std::sync::Arc;
 
 use gpui3::{
-    rems, AbsoluteLength, AnyElement, BorrowAppContext, Bounds, LayoutId, Pixels, WindowContext,
+    rems, AbsoluteLength, AnyElement, BorrowAppContext, Bounds, Interactive, LayoutId, Pixels,
+    WindowContext,
 };
 
 use crate::prelude::*;
@@ -11,6 +13,10 @@ pub fn user_settings(cx: &WindowContext) -> FakeSettings {
     cx.global::<FakeSettings>().clone()
 }
 
+pub fn user_settings_mut<'cx>(cx: &'cx mut WindowContext) -> &'cx mut FakeSettings {
+    cx.global_mut::<FakeSettings>()
+}
+
 #[derive(Clone)]
 pub enum SettingValue<T> {
     UserDefined(T),
@@ -143,3 +149,32 @@ impl<E: Element> Element for WithSettings<E> {
         });
     }
 }
+
+impl<E: Element + Interactive> Interactive for WithSettings<E> {
+    fn listeners(&mut self) -> &mut gpui3::EventListeners<Self::ViewState> {
+        self.child.listeners()
+    }
+
+    fn on_mouse_down(
+        mut self,
+        button: gpui3::MouseButton,
+        handler: impl Fn(&mut Self::ViewState, &gpui3::MouseDownEvent, &mut ViewContext<Self::ViewState>)
+            + Send
+            + Sync
+            + 'static,
+    ) -> Self
+    where
+        Self: Sized,
+    {
+        println!("WithSettings on_mouse_down");
+
+        let settings = self.settings.clone();
+
+        self.listeners()
+            .mouse_down
+            .push(Arc::new(move |view, event, bounds, phase, cx| {
+                cx.with_global(settings.clone(), |cx| handler(view, event, cx))
+            }));
+        self
+    }
+}