Index: /trunk/nv/gui/gui_style.hh
===================================================================
--- /trunk/nv/gui/gui_style.hh	(revision 104)
+++ /trunk/nv/gui/gui_style.hh	(revision 104)
@@ -0,0 +1,45 @@
+// Copyright (C) 2012-2013 ChaosForge / Kornel Kisielewicz
+// http://chaosforge.org/
+//
+// This file is part of NV Libraries.
+// For conditions of distribution and use, see copyright notice in nv.hh
+
+/**
+ * @file gui_style.hh
+ * @author Kornel Kisielewicz
+ * @brief GUI Styue
+ */
+
+#ifndef NV_GUI_STYLE_HH
+#define NV_GUI_STYLE_HH
+
+#include <nv/gui/gui_element.hh>
+#include <nv/lua/lua_state.hh>
+
+namespace nv
+{
+
+	namespace gui
+	{
+
+		class style
+		{
+		public:
+			style();
+			void load_style( const std::string& filename );
+			bool get( element* e, const std::string& entry, std::string& s );
+			bool get( element* e, const std::string& entry, vec4& vec );
+			bool get( element* e, const std::string& entry, int& i );
+			bool get( element* e, const std::string& entry, double& d );
+			~style();
+		protected:
+			bool resolve( element* e, const std::string& entry, int type );
+		protected:
+			lua::state m_lua; //< separate lua state for style calculation
+		};
+
+	} // namespace gui
+
+} // namespace nv
+
+#endif // NV_GUI_STYLE_HH
Index: /trunk/src/gui/gui_style.cc
===================================================================
--- /trunk/src/gui/gui_style.cc	(revision 104)
+++ /trunk/src/gui/gui_style.cc	(revision 104)
@@ -0,0 +1,96 @@
+// Copyright (C) 2012-2013 ChaosForge / Kornel Kisielewicz
+// http://chaosforge.org/
+//
+// This file is part of NV Libraries.
+// For conditions of distribution and use, see copyright notice in nv.hh
+
+#include "nv/gui/gui_style.hh"
+
+#include <nv/lua/lua_raw.hh>
+
+using namespace nv;
+using namespace nv::gui;
+
+style::style()
+{
+}
+
+void style::load_style( const std::string& filename )
+{
+	m_lua.do_file( filename );
+}
+
+bool style::get( element* e, const std::string& entry, std::string& s )
+{
+	lua::stack_guard guard( m_lua );
+	if ( !resolve( e, entry, LUA_TSTRING ) ) return false;
+	s = lua_tostring( m_lua, -1 );
+	return true;
+}
+
+bool style::get( element* e, const std::string& entry, vec4& vec )
+{
+	lua::stack_guard guard( m_lua );
+	if ( !resolve( e, entry, LUA_TTABLE ) ) return false;
+	vec = vec4();
+	for (size_t i = 0; i < 4; ++i )
+	{
+		lua_rawgeti( m_lua, -1, i+1 );
+		if ( lua_isnil( m_lua, -1 ) ) return true;
+		vec[i] = (float)lua_tonumber( m_lua, -1 );
+		lua_pop( m_lua, 1 );
+	}
+	return true;
+}
+
+bool style::get( element* e, const std::string& entry, int& i )
+{
+	lua::stack_guard guard( m_lua );
+	if ( !resolve( e, entry, LUA_TNUMBER ) ) return false;
+	i = lua_tointeger( m_lua, -1 );
+	return true;
+}
+
+bool style::get( element* e, const std::string& entry, double& d )
+{
+	lua::stack_guard guard( m_lua );
+	if ( !resolve( e, entry, LUA_TNUMBER ) ) return false;
+	d = lua_tonumber( m_lua, -1 );
+	return true;
+}
+
+style::~style()
+{
+}
+
+bool style::resolve( element* e, const std::string& entry, int type )
+{
+	const char* centry = entry.c_str();
+	const char* cid    = e->get_id().c_str();
+	const char* cclass = e->get_class().c_str();
+	lua_getglobal( m_lua, "default" );
+	int global = lua_gettop( m_lua );
+
+	// check id
+	lua_getfield( m_lua, -1, cid );
+	if ( !lua_istable( m_lua, -1 ) )
+	{
+		lua_getfield( m_lua, -1, centry );
+		if ( lua_type( m_lua, -1 ) == type ) return true;
+	}
+	lua_settop( m_lua, global );
+
+	// check class
+	lua_getfield( m_lua, -1, cclass );
+	if ( !lua_istable( m_lua, -1 ) )
+	{
+		lua_getfield( m_lua, -1, centry );
+		if ( lua_type( m_lua, -1 ) == type ) return true;
+	}
+	lua_settop( m_lua, global );
+
+	// check entry
+	lua_getfield( m_lua, -1, cclass );
+	if ( lua_type( m_lua, -1 ) == type ) return true;
+	return false;
+}