feat: add window::Event::ScaleFactorChanged

core/src/window/event.rs

@@ -71,4 +71,7 @@ pub enum Event {
     ///
     /// - **Wayland:** Not implemented.
     FilesHoveredLeft,
+
+    /// A window's scale factor was changed.
+    ScaleFactorChanged(f64),
 }

winit/src/conversion.rs

@@ -331,6 +331,9 @@ pub fn window_event(
 
             Some(Event::Window(window::Event::Moved(Point::new(x, y))))
         }
+        WindowEvent::ScaleFactorChanged { scale_factor, .. } => Some(
+            Event::Window(window::Event::ScaleFactorChanged(scale_factor)),
+        ),
         _ => None,
     }
 }