Refactor to centralize GUIButton styling/rendering code (#9090)

src/gui/guiButtonItemImage.h

@@ -0,0 +1,45 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "guiButton.h"
+#include "IGUIButton.h"
+
+using namespace irr;
+
+class Client;
+class GUIItemImage;
+
+class GUIButtonItemImage : public GUIButton
+{
+public:
+	//! constructor
+	GUIButtonItemImage(gui::IGUIEnvironment *environment, gui::IGUIElement *parent,
+			s32 id, core::rect<s32> rectangle, std::string item,
+			Client *client, bool noclip = false);
+
+	//! Do not drop returned handle
+	static GUIButtonItemImage *addButton(gui::IGUIEnvironment *environment,
+			const core::rect<s32> &rectangle, IGUIElement *parent, s32 id,
+			const wchar_t *text, std::string item, Client *client);
+
+private:
+	std::string m_item_name;
+	Client *m_client;
+	GUIItemImage *m_image;
+};