From 269886fc4e40a8da94c89bcf031f3bb0fd70d968 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Fri, 12 Apr 2019 02:51:16 +0200
Subject: [PATCH] GWidget: Add "enabled" state for widgets.

There's nothing magical that happens for painting, each widget needs to
handle it manually in their painting code.
---
 LibGUI/GWidget.cpp | 8 ++++++++
 LibGUI/GWidget.h   | 4 ++++
 2 files changed, 12 insertions(+)

diff --git a/LibGUI/GWidget.cpp b/LibGUI/GWidget.cpp
index c1d2d272d4..7bb8bd08de 100644
--- a/LibGUI/GWidget.cpp
+++ b/LibGUI/GWidget.cpp
@@ -408,3 +408,11 @@ bool GWidget::spans_entire_window_horizontally() const
     auto wrr = window_relative_rect();
     return wrr.left() == main_widget->rect().left() && wrr.right() == main_widget->rect().right();
 }
+
+void GWidget::set_enabled(bool enabled)
+{
+    if (m_enabled == enabled)
+        return;
+    m_enabled = enabled;
+    update();
+}
diff --git a/LibGUI/GWidget.h b/LibGUI/GWidget.h
index 45e12535d2..a7edf79982 100644
--- a/LibGUI/GWidget.h
+++ b/LibGUI/GWidget.h
@@ -38,6 +38,9 @@ public:
     String tooltip() const { return m_tooltip; }
     void set_tooltip(const String& tooltip) { m_tooltip = tooltip; }
 
+    bool is_enabled() const { return m_enabled; }
+    void set_enabled(bool);
+
     virtual void event(CEvent&) override;
     virtual void paint_event(GPaintEvent&);
     virtual void resize_event(GResizeEvent&);
@@ -180,6 +183,7 @@ private:
     bool m_fill_with_background_color { false };
     bool m_visible { true };
     bool m_greedy_for_hits { false };
+    bool m_enabled { true };
 
     CElapsedTimer m_click_clock;
 };