improve date_chooser

add keyboard support
add date_changed event

include/nana/gui/widgets/date_chooser.hpp

@@ -1,7 +1,7 @@
 /**
  *	A date chooser Implementation
  *	Nana C++ Library(http://www.nanapro.org)
- *	Copyright(C) 2003-2015 Jinhao(cnjinhao@hotmail.com)
+ *	Copyright(C) 2003-2016 Jinhao(cnjinhao@hotmail.com)
  *
  *	Distributed under the Boost Software License, Version 1.0. 
  *	(See accompanying file LICENSE_1_0.txt or copy at 
@@ -18,80 +18,47 @@
 
 namespace nana
 {
+	class date_chooser;
+
+	struct arg_datechooser
+		: public event_arg
+	{
+		date_chooser * const widget;
+
+		arg_datechooser(date_chooser* wdg)
+			: widget(wdg)
+		{}
+	};
+
 	namespace drawerbase
 	{
 		namespace date_chooser
 		{
+			struct date_chooser_events
+				: public general_events
+			{
+
+				basic_event<arg_datechooser> date_changed;
+			};
+			
 			class trigger : public drawer_trigger
 			{
+				class model;
 			public:
 				static const int topbar_height = 34;
 				static const int border_size = 3;
 
-				enum class transform_action{none, to_left, to_right, to_enter, to_leave};
-				enum class where{none, left_button, right_button, topbar, textarea};
-				enum class page{date, month};
-
-				struct drawing_basis
-				{
-					nana::point refpos;
-					double line_s;
-					double row_s;
-				};
-
 				trigger();
-				bool chose() const;
-				nana::date read() const;
-				void week_name(unsigned index, const std::string&);
-			private:
-				where _m_pos_where(graph_reference, const ::nana::point& pos);
-				void _m_draw_topbar(graph_reference);
-				void _m_make_drawing_basis(drawing_basis&, graph_reference, const nana::point& refpos);
-				void _m_draw_pos(drawing_basis &, graph_reference, int x, int y, const ::std::string&, bool primary, bool sel);
-				void _m_draw_pos(drawing_basis &, graph_reference, int x, int y, int number, bool primary, bool sel);
-				void _m_draw_ex_days(drawing_basis &, graph_reference, int begx, int begy, bool before);
-				void _m_draw_days(const nana::point& refpos, graph_reference);
-				void _m_draw_months(const nana::point& refpos, graph_reference);
-				bool _m_get_trace(point, int & res);
-				void _m_perf_transform(transform_action tfid, graph_reference,  graph_reference dirtybuf, graph_reference newbuf, const nana::point& refpos);
+				~trigger();
+				model* get_model() const;
 			private:
 				void refresh(graph_reference) override;
-				void attached(widget_reference, graph_reference)	override;
 				void mouse_move(graph_reference, const arg_mouse&)	override;
 				void mouse_leave(graph_reference, const arg_mouse&)	override;
 				void mouse_up(graph_reference, const arg_mouse&)	override;
+				void key_press(graph_reference, const arg_keyboard&) override;
 			private:
-				::std::string weekstr_[7];
-
-				widget * widget_;
-				
-				bool chose_;
-				page	page_;
-				where	pos_;
-				nana::point trace_pos_;
-
-				drawing_basis	dbasis_;
-
-				struct
-				{
-					int year;
-					int month;
-					int day;
-				}chdate_;
-
-				struct
-				{
-					int year;
-					int month;				
-				}chmonth_;
-
-				struct color_tag
-				{
-					::nana::color highlight;
-					::nana::color selected;
-					::nana::color normal;
-					::nana::color bgcolor;
-				}color_;
+				model * model_;
 			};
 		
 		}//end namespace date_chooser
@@ -100,18 +67,16 @@ namespace nana
 
 	/// \see nana::date
 	class date_chooser
-		: public widget_object<category::widget_tag, drawerbase::date_chooser::trigger>
+		: public widget_object<category::widget_tag, drawerbase::date_chooser::trigger, drawerbase::date_chooser::date_chooser_events>
 	{
 	public:
 		date_chooser();
 		date_chooser(window, bool visible);
-		date_chooser(window, const ::std::string& text, bool visible = true);
-		date_chooser(window, const char* text, bool visible = true);
 		date_chooser(window, const nana::rectangle& r = rectangle(), bool visible = true);
 
 		bool chose() const;
 		nana::date read() const;
-		void weekstr(unsigned index, const ::std::string&);///<Set the week strings which will be displayed for day, index is in range of [0, 6]
+		void weekstr(unsigned index, ::std::string);///<Set the week strings which will be displayed for day, index is in range of [0, 6]
 	};
 }//end namespace nana