From 644d5c5404cfebac3a9b1e915a59ba04acc730bd Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Mon, 28 Dec 2020 00:33:46 +0100
Subject: [PATCH] LibGUI: Switch focus if the currently focused widget is
 disabled

---
 Libraries/LibGUI/Widget.cpp | 4 ++++
 Libraries/LibGUI/Window.cpp | 5 +++++
 Libraries/LibGUI/Window.h   | 2 ++
 3 files changed, 11 insertions(+)

diff --git a/Libraries/LibGUI/Widget.cpp b/Libraries/LibGUI/Widget.cpp
index 1b57897f4a..47aaf29646 100644
--- a/Libraries/LibGUI/Widget.cpp
+++ b/Libraries/LibGUI/Widget.cpp
@@ -728,6 +728,10 @@ void Widget::set_enabled(bool enabled)
         return IterationDecision::Continue;
     });
 
+    if (!m_enabled && window() && window()->focused_widget() == this) {
+        window()->did_disable_focused_widget({});
+    }
+
     Event e(Event::EnabledChange);
     event(e);
     update();
diff --git a/Libraries/LibGUI/Window.cpp b/Libraries/LibGUI/Window.cpp
index 59e26f2c3c..9cf1e37ab9 100644
--- a/Libraries/LibGUI/Window.cpp
+++ b/Libraries/LibGUI/Window.cpp
@@ -927,4 +927,9 @@ void Window::focus_a_widget_if_possible(FocusSource source)
         set_focused_widget(focusable_widgets[0], source);
 }
 
+void Window::did_disable_focused_widget(Badge<Widget>)
+{
+    focus_a_widget_if_possible(FocusSource::Mouse);
+}
+
 }
diff --git a/Libraries/LibGUI/Window.h b/Libraries/LibGUI/Window.h
index 93fec29e49..f4298c6986 100644
--- a/Libraries/LibGUI/Window.h
+++ b/Libraries/LibGUI/Window.h
@@ -196,6 +196,8 @@ public:
 
     void update_cursor(Badge<Widget>) { update_cursor(); }
 
+    void did_disable_focused_widget(Badge<Widget>);
+
 protected:
     Window(Core::Object* parent = nullptr);
     virtual void wm_event(WMEvent&);