add lua add_widget_definition function

http://gna.org/bugs/?25337

src/gui/core/register_widget.hpp

@@ -41,15 +41,9 @@
 		{                                                                      \
 			register_helper()                                                  \
 			{                                                                  \
-				register_widget(#id,                                           \
-								[](const config& cfg) { return std::make_shared<type>(cfg); },       \
-								key);                             \
+				register_widget(#id, [](const config& cfg) { return std::make_shared<type>(cfg); }, key); \
                                                                                \
-				register_builder_widget(                                       \
-						#id,                                                   \
-						std::bind(                                             \
-								build_widget<implementation::builder_##id>,    \
-								_1));                                          \
+				register_builder_widget(#id, &build_widget<implementation::builder_##id>); \
 			}                                                                  \
 		};                                                                     \
                                                                                \

src/gui/widgets/settings.cpp

@@ -478,7 +478,7 @@ static std::map<std::string, gui_definition> guis;
 static std::map<std::string, gui_definition>::const_iterator current_gui = guis.end();
 
 /** Points to the default gui. */
-static std::map<std::string, gui_definition>::const_iterator default_gui = guis.end();
+static std::map<std::string, gui_definition>::iterator default_gui = guis.end();
 
 void register_window(const std::string& id)
 {
@@ -704,4 +704,21 @@ get_window_builder(const std::string& type)
  *
  */
 
+bool add_single_widget_definition(const std::string& widget_type, const std::string& definition_id, const config& cfg)
+{
+	auto& gui = default_gui->second;
+	auto parser = registred_widget_type().find(widget_type);
+
+	if (parser == registred_widget_type().end()) {
+		throw std::invalid_argument("widget '" + widget_type  + "' doesn't exist");
+	}
+
+	if (gui.control_definition[widget_type].find(definition_id) != gui.control_definition[widget_type].end()) {
+		return false;
+	}
+
+	gui.control_definition[widget_type].insert(std::make_pair(definition_id, parser->second.parser(cfg)));
+	return true;
+}
+
 } // namespace gui2

src/gui/widgets/settings.hpp

@@ -103,6 +103,8 @@ void load_widget_definitions(
 resolution_definition_ptr get_control(const std::string& control_type,
 									   const std::string& definition);
 
+bool add_single_widget_definition(const std::string& widget_type, const std::string& definition_id, const config& cfg);
+
 /** Helper struct to signal that get_window_builder failed. */
 struct window_builder_invalid_id
 {

src/scripting/lua_gui2.cpp

@@ -27,6 +27,7 @@
 #include "gui/widgets/multi_page.hpp"   // for tmulti_page
 #include "gui/widgets/progress_bar.hpp"  // for tprogress_bar
 #include "gui/widgets/selectable_item.hpp"   // for tselectable_item
+#include "gui/widgets/settings.hpp"
 #include "gui/widgets/slider.hpp"       // for tslider
 #include "gui/widgets/stacked_widget.hpp"
 #include "gui/widgets/text_box.hpp"     // for ttext_box
@@ -842,4 +843,20 @@ int intf_add_dialog_tree_node(lua_State *L)
 	return 0;
 }
 
+/**
+ * - Arg 1: string, widget type
+ * - Arg 3: string, id
+ * - Arg 3: conifg,
+ */
+
+int intf_add_widget_definition(lua_State *L)
+{
+	try {
+		gui2::add_single_widget_definition(luaL_checkstring(L, 1), luaL_checkstring(L, 2), luaW_checkconfig(L, 3));
+	}
+	catch (const std::invalid_argument& e) {
+		return luaL_argerror(L, 1, e.what());
+	}
+	return 0;
+}
 } // end namespace lua_gui2

src/scripting/lua_gui2.hpp

@@ -33,6 +33,7 @@ int intf_set_dialog_focus(lua_State *L);
 int intf_set_dialog_active(lua_State *L);
 int intf_set_dialog_visible(lua_State *L);
 int intf_add_dialog_tree_node(lua_State *L);
+int intf_add_widget_definition(lua_State *L);
 int show_dialog(lua_State *L, CVideo & video);
 int show_message_dialog(lua_State *L, CVideo & video);
 int show_popup_dialog(lua_State *L, CVideo & video);

src/scripting/lua_kernel_base.cpp

@@ -355,6 +355,7 @@ lua_kernel_base::lua_kernel_base()
 		{ "set_dialog_active",        &lua_gui2::intf_set_dialog_active		},
 		{ "set_dialog_visible",       &lua_gui2::intf_set_dialog_visible    },
 		{ "add_dialog_tree_node",     &lua_gui2::intf_add_dialog_tree_node	},
+		{ "add_widget_definition",    &lua_gui2::intf_add_widget_definition },
 		{ "set_dialog_callback",      &lua_gui2::intf_set_dialog_callback	},
 		{ "set_dialog_canvas",        &lua_gui2::intf_set_dialog_canvas		},
 		{ "set_dialog_focus",         &lua_gui2::intf_set_dialog_focus      },