fix: style won't show as expect only when sync once

Author: Decodetalkers

iced_layershell/src/multi_window.rs

@@ -443,6 +443,8 @@ where
                 .copied()
                 .unwrap_or_else(IcedId::unique);
 
+            let is_first = self.window_manager.is_empty();
+
             let window = self.window_manager.insert(
                 iced_id,
                 (width, height),
@@ -455,6 +457,20 @@ where
                 self.system_theme,
             );
 
+            iced_debug::theme_changed(|| {
+                if is_first {
+                    theme::Base::palette(window.state.theme())
+                } else {
+                    None
+                }
+            });
+
+            let theme = window.state.theme().mode();
+            if self.system_theme != theme {
+                self.runtime
+                    .broadcast(iced_futures::subscription::Event::SystemThemeChanged(theme));
+            }
+
             self.user_interfaces.build(
                 iced_id,
                 user_interface::Cache::default(),

iced_layershell/src/multi_window/state.rs

@@ -57,7 +57,7 @@ where
             .map(iced_core::theme::Base::mode)
             .unwrap_or_default();
         let default_theme = <P::Theme as iced_core::theme::Base>::default(system_theme);
-        let style = application.style(&default_theme);
+        let style = application.style(&theme.as_ref().unwrap_or(&default_theme));
 
         let window_size = Size::new(width, height);
         let viewport = viewport(window_size, wayland_scale_factor, application_scale_factor);

iced_sessionlock/src/multi_window/state.rs

@@ -49,7 +49,7 @@ where
             .map(iced_core::theme::Base::mode)
             .unwrap_or_default();
         let default_theme = <P::Theme as iced_core::theme::Base>::default(system_theme);
-        let style = application.style(&default_theme);
+        let style = application.style(&theme.as_ref().unwrap_or(&default_theme));
 
         let window_size = Size::new(width, height);
         let viewport = viewport(window_size, wayland_scale_factor, application_scale_factor);