From 535e1c91526924c3a67c2125e08986550a743b56 Mon Sep 17 00:00:00 2001
From: networkException <git@nwex.de>
Date: Thu, 16 Jun 2022 14:16:31 +0200
Subject: LibGUI: Add on_theme_change callback to Application

This allows an Application without a window to listen for theme changes.
---
 Userland/Libraries/LibGUI/Application.cpp              | 4 ++++
 Userland/Libraries/LibGUI/Application.h                | 1 +
 Userland/Libraries/LibGUI/ConnectionToWindowServer.cpp | 2 ++
 3 files changed, 7 insertions(+)

(limited to 'Userland/Libraries')

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)
-- 
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