add scheme and caption alignment to group widget.

include/nana/gui/widgets/group.hpp

@@ -22,8 +22,20 @@
 #include <nana/gui/widgets/checkbox.hpp>
 
 namespace nana{
+
+	namespace drawerbase
+	{
+		namespace group
+		{
+			struct scheme : public nana::widget_geometrics
+			{
+				color_proxy border{ colors::gray_border };
+			};
+		}// end namespace panel
+	}//end namespace drawerbase
+
 	class group
-		: public panel<true>
+		: public widget_object<category::widget_tag, drawerbase::panel::drawer, general_events, drawerbase::group::scheme>
 	{
 		struct implement;
 	public:
@@ -53,6 +65,9 @@ namespace nana{
 		/// Adds an option for user selection
 		checkbox& add_option(::std::string);
 
+		/// Modifies the alignment of the title
+		void caption_align(align position);
+
 		/// Enables/disables the radio mode which is single selection
 		group& radio_mode(bool);