Fmt.

examples/draw/draw_texture_sampler.rs

@@ -55,12 +55,7 @@ fn view(app: &App, model: &Model) {
     // sampler behaves when sampling beyond the bounds of the texture in each of the different
     // address modes. By default, the bounds of the texture coordinates are 0.0 to 1.0. We will
     // triple the size.
-    let area = geom::Rect::from_x_y_w_h(
-        0.5,
-        0.5,
-        app.time().sin() * 10.0,
-        app.time().sin() * 10.0,
-    );
+    let area = geom::Rect::from_x_y_w_h(0.5, 0.5, app.time().sin() * 10.0, app.time().sin() * 10.0);
     let window_rect = app.main_window().rect();
 
     draw.rect()

examples/draw/draw_transform.rs

@@ -29,8 +29,7 @@ fn view(app: &App) {
 
         // Return a new rotated draw instance.
         // This will rotate both the rect and text around the origin.
-        let rotate = (app.time() * 0.5).sin()
-            * (app.time() * 0.25 + f * PI * 2.0).cos();
+        let rotate = (app.time() * 0.5).sin() * (app.time() * 0.25 + f * PI * 2.0).cos();
         let draw = draw.rotate(rotate);
 
         let hue = app.time() + f * 2.0 * PI;

nannou/src/app.rs

@@ -569,15 +569,19 @@ impl<'w> App<'w> {
 
     #[cfg(feature = "egui")]
     /// Get the egui context for the provided window.
-    pub fn egui_for_window(&self, window: Entity) -> Mut<EguiContext> {
-        self.world_mut()
-            .get_mut::<EguiContext>(window)
-            .expect("No egui context")
+    pub fn egui_for_window(&self, window: Entity) -> RefMut<EguiContext> {
+        let world = self.world_mut();
+        RefMut::map(world, |world| {
+            world
+                .get_mut::<EguiContext>(window)
+                .expect("No egui context")
+                .into_inner()
+        })
     }
 
     #[cfg(feature = "egui")]
     /// Get the egui context for the currently focused window.
-    pub fn egui(&self) -> Mut<EguiContext> {
+    pub fn egui(&self) -> RefMut<EguiContext> {
         self.egui_for_window(self.window_id())
     }
 

nannou/src/window.rs

@@ -904,9 +904,7 @@ impl<'a, 'w> Window<'a, 'w> {
 
     /// Saves a screenshot of the window to the given path.
     pub fn save_screenshot<P: AsRef<Path>>(&mut self, path: P) {
-        let mut world = self
-            .app
-            .world_mut();
+        let mut world = self.app.world_mut();
         let mut screenshot_manager = world
             .get_resource_mut::<ScreenshotManager>()
             .expect("ScreenshotManager resource not found");