Track window theme in window::State

core/src/window/event.rs

@@ -1,3 +1,4 @@
+use crate::theme;
 use crate::time::Instant;
 use crate::{Point, Size};
 
@@ -71,4 +72,7 @@ pub enum Event {
     ///
     /// - **Wayland:** Not implemented.
     FilesHoveredLeft,
+
+    /// The theme mode of the window has changed.
+    ThemeModeChanged(theme::Mode),
 }