fix: opaque menu for overlay

src/theme/style/menu_bar.rs

@@ -31,7 +31,7 @@ pub trait StyleSheet {
     type Style: Default;
 
     /// Produces the [`Appearance`] of a menu bar and its menus.
-    fn appearance(&self, style: &Self::Style) -> Appearance;
+    fn appearance(&self, style: &Self::Style, is_overlay: bool) -> Appearance;
 }
 
 /// The style of a menu bar and its menus
@@ -54,7 +54,7 @@ impl From<fn(&Theme) -> Appearance> for MenuBarStyle {
 impl StyleSheet for fn(&Theme) -> Appearance {
     type Style = Theme;
 
-    fn appearance(&self, style: &Self::Style) -> Appearance {
+    fn appearance(&self, style: &Self::Style, _is_overlay: bool) -> Appearance {
         (self)(style)
     }
 }
@@ -62,9 +62,9 @@ impl StyleSheet for fn(&Theme) -> Appearance {
 impl StyleSheet for Theme {
     type Style = MenuBarStyle;
 
-    fn appearance(&self, style: &Self::Style) -> Appearance {
+    fn appearance(&self, style: &Self::Style, is_overlay: bool) -> Appearance {
         let cosmic = self.cosmic();
-        let component = &cosmic.background(self.transparent).component;
+        let component = &cosmic.background(!is_overlay && self.transparent).component;
         let mut bg = component.base;
 
         match style {
@@ -77,7 +77,7 @@ impl StyleSheet for Theme {
                 background_expand: [1; 4],
                 path: component.hover.into(),
             },
-            MenuBarStyle::Custom(c) => c.appearance(self),
+            MenuBarStyle::Custom(c) => c.appearance(self, is_overlay),
         }
     }
 }

src/widget/menu/menu_bar.rs

@@ -715,7 +715,21 @@ where
 
             // draw path highlight
             if self.path_highlight.is_some() {
-                let styling = theme.appearance(&self.style);
+                let mut is_overlay = true;
+                #[cfg(all(
+                    feature = "multi-window",
+                    feature = "wayland",
+                    target_os = "linux",
+                    feature = "winit",
+                    feature = "surface-message"
+                ))]
+                if matches!(WINDOWING_SYSTEM.get(), Some(WindowingSystem::Wayland))
+                    && self.on_surface_action.is_some()
+                    && self.window_id != window::Id::NONE
+                {
+                    is_overlay = true;
+                };
+                let styling = theme.appearance(&self.style, is_overlay);
                 if let Some(active) = state.active_root.first() {
                     let active_bounds = layout
                         .children()

src/widget/menu/menu_inner.rs

@@ -742,7 +742,7 @@ impl<'b, Message: Clone + 'static> Menu<'b, Message> {
                 Rectangle::new(Point::ORIGIN, Size::INFINITE)
             };
 
-            let styling = theme.appearance(&self.style);
+            let styling = theme.appearance(&self.style, self.is_overlay);
             let roots = active_root.iter().skip(1).fold(
                 &self.menu_roots[active_root[0]].children,
                 |mt, next_active_root| &mt[*next_active_root].children,