From 93afff1d1adf627cdaef139dbeb0ebe256f7b564 Mon Sep 17 00:00:00 2001
From: Charles Dang <exodia339@gmail.com>
Date: Mon, 12 Aug 2019 12:36:07 +1100
Subject: [PATCH] Fixed regression from 4139b43cc900 (fixes #4215)

This fixes the buttons in the editor's terrain palette being unselectable. Since the gui::widget class
had a virtual base class, the class was not trivially copy-constructable. We need to explicitly define
the copy constructor so we can initialize the sdl_handler base class.
---
 src/widgets/widget.cpp | 21 +++++++++++++++++++++
 src/widgets/widget.hpp |  1 +
 2 files changed, 22 insertions(+)

diff --git a/src/widgets/widget.cpp b/src/widgets/widget.cpp
index 7d19556101cc..3ab8a8a51595 100644
--- a/src/widgets/widget.cpp
+++ b/src/widgets/widget.cpp
@@ -30,6 +30,27 @@ namespace gui {
 
 bool widget::mouse_lock_ = false;
 
+widget::widget(const widget& o)
+	: events::sdl_handler()
+	, focus_(o.focus_)
+	, video_(o.video_)
+	, restorer_(o.restorer_)
+	, rect_(o.rect_)
+	, needs_restore_(o.needs_restore_)
+	, state_(o.state_)
+	, hidden_override_(o.hidden_override_)
+	, enabled_(o.enabled_)
+	, clip_(o.clip_)
+	, clip_rect_(o.clip_rect_)
+	, volatile_(o.volatile_)
+	, help_text_(o.help_text_)
+	, tooltip_text_(o.tooltip_text_)
+	, help_string_(o.help_string_)
+	, id_(o.id_)
+	, mouse_lock_local_(o.mouse_lock_local_)
+{
+}
+
 widget::widget(CVideo& video, const bool auto_join)
 	: events::sdl_handler(auto_join), focus_(true), video_(&video), rect_(EmptyRect), needs_restore_(false),
 	  state_(UNINIT), hidden_override_(false), enabled_(true), clip_(false),
diff --git a/src/widgets/widget.hpp b/src/widgets/widget.hpp
index a200f0f4507b..34f457bed82a 100644
--- a/src/widgets/widget.hpp
+++ b/src/widgets/widget.hpp
@@ -69,6 +69,7 @@ class widget : public events::sdl_handler
 	virtual void process_tooltip_string(int mousex, int mousey);
 
 protected:
+	widget(const widget& o);
 	widget(CVideo& video, const bool auto_join=true);
 	virtual ~widget();