LibGUI: Add on_theme_change callback to Application

This allows an Application without a window to listen for theme changes.

3 files changed, 7 insertions, 0 deletions

diff --git a/Userland/Libraries/LibGUI/Application.cpp b/Userland/Libraries/LibGUI/Application.cpp
index c5d0f670fe..ded131f1cc 100644
--- a/Userland/Libraries/LibGUI/Application.cpp
+++ b/Userland/Libraries/LibGUI/Application.cpp
@@ -311,6 +311,10 @@ void Application::event(Core::Event& event)
                 on_action_leave(action);
         }
     }
+    if (event.type() == GUI::Event::ThemeChange) {
+        if (on_theme_change)
+            on_theme_change();
+    }
     Object::event(event);
 }
 
diff --git a/Userland/Libraries/LibGUI/Application.h b/Userland/Libraries/LibGUI/Application.h
index e74fc6abca..0f224f41a6 100644
--- a/Userland/Libraries/LibGUI/Application.h
+++ b/Userland/Libraries/LibGUI/Application.h
@@ -83,6 +83,7 @@ public:
 
     Function<void(Action&)> on_action_enter;
     Function<void(Action&)> on_action_leave;
+    Function<void()> on_theme_change;
 
     auto const& global_shortcut_actions(Badge<GUI::CommandPalette>) const { return m_global_shortcut_actions; }
 
diff --git a/Userland/Libraries/LibGUI/ConnectionToWindowServer.cpp b/Userland/Libraries/LibGUI/ConnectionToWindowServer.cpp
index 61e997d57c..11637bf2a1 100644
--- a/Userland/Libraries/LibGUI/ConnectionToWindowServer.cpp
+++ b/Userland/Libraries/LibGUI/ConnectionToWindowServer.cpp
@@ -67,6 +67,8 @@ void ConnectionToWindowServer::update_system_theme(Core::AnonymousBuffer const&
     Window::for_each_window({}, [](auto& window) {
         Core::EventLoop::current().post_event(window, make<ThemeChangeEvent>());
     });
+
+    Application::the()->dispatch_event(*make<ThemeChangeEvent>());
 }
 
 void ConnectionToWindowServer::update_system_fonts(String const& default_font_query, String const& fixed_width_font_query)