add insert/append/erase methods to template class tabbar

include/nana/gui/widgets/tabbar.hpp

@@ -40,7 +40,9 @@ namespace nana
 			: arg_tabbar<T>({wdg, v})
 		{}
 
-		bool remove = true;
+		bool remove = true;					///< determines whether to remove the item
+		bool close_attach_window = true;	///< determines whether to close the attached window. It is ignored if remove is false
+
 	};
 
 	namespace drawerbase
@@ -51,11 +53,11 @@ namespace nana
 			struct tabbar_events
 				: public general_events
 			{
-				typedef T value_type;
+				using value_type = T;
 
 				basic_event<arg_tabbar<value_type>> added;
 				basic_event<arg_tabbar<value_type>> activated;
-				basic_event<arg_tabbar<value_type>> removed;
+				basic_event<arg_tabbar_removed<value_type>> removed;
 			};
 
 			class event_agent_interface
@@ -64,7 +66,7 @@ namespace nana
 				virtual ~event_agent_interface() = default;
 				virtual void added(std::size_t) = 0;
 				virtual void activated(std::size_t) = 0;
-				virtual bool removed(std::size_t) = 0;
+				virtual bool removed(std::size_t, bool & close_attached) = 0;
 			};
 
 			class item_renderer
@@ -98,7 +100,7 @@ namespace nana
 				: public event_agent_interface
 			{
 			public:
-				typedef ::nana::arg_tabbar<T>	arg_tabbar;
+				using arg_tabbar = ::nana::arg_tabbar<T>;
 
 				event_agent(::nana::tabbar<T>& tb, DrawerTrigger & dtr)
 					: tabbar_(tb), drawer_trigger_(dtr)
@@ -119,14 +121,16 @@ namespace nana
 						tabbar_.events().activated.emit(arg_tabbar({ tabbar_, tabbar_[pos]}));
 				}
 
-				bool removed(std::size_t pos) override
+				bool removed(std::size_t pos, bool & close_attach) override
 				{
 					if (pos != npos)
 					{
 						::nana::arg_tabbar_removed<T> arg(tabbar_, tabbar_[pos]);
 						tabbar_.events().removed.emit(arg);
+						close_attach = arg.close_attach_window;
 						return arg.remove;
 					}
+					close_attach = true;
 					return true;
 				}
 			private:
@@ -140,8 +144,6 @@ namespace nana
 				: public drawer_trigger
 			{
 			public:
-				//enum toolbox_button_t{ButtonAdd, ButtonScroll, ButtonList, ButtonClose};	//deprecated
-
 				enum class kits
 				{
 					add,
@@ -159,10 +161,11 @@ namespace nana
 				const pat::cloneable<item_renderer> & ext_renderer() const;
 				void ext_renderer(const pat::cloneable<item_renderer>&);
 				void set_event_agent(event_agent_interface*);
-				void push_back(const nana::string&, const nana::any&);
+				void insert(std::size_t, nana::string&&, nana::any&&);
 				std::size_t length() const;
 				bool close_fly(bool);
-				void relate(size_t, window);
+				void attach(std::size_t, window);
+				void erase(std::size_t);
 				void tab_color(std::size_t, bool is_bgcolor, const ::nana::color&);
 				void tab_image(size_t, const nana::paint::image&);
 				void text(std::size_t, const nana::string&);
@@ -289,16 +292,57 @@ namespace nana
 			return this->get_drawer_trigger().length();
 		}
 
-		void push_back(const nana::string& text)  /// Append a new item.
+		void append(const std::string& text, window attach_wd, value_type value = {})
 		{
-			auto & t = this->get_drawer_trigger();
+			this->append(static_cast<std::wstring>(nana::charset(text, nana::unicode::utf8)), attach_wd);
-			t.push_back(text, value_type());
+		}
+
+		void append(const std::wstring& text, window attach_wd, value_type value = {})
+		{
+			this->get_drawer_trigger().insert(::nana::npos, std::wstring(text), std::move(value));
+			if (attach_wd)
+			{
+				auto pos = this->get_drawer_trigger().length();
+				relate(pos, attach_wd);
+			}
+			
 			API::update_window(*this);
 		}
 
+		void push_back(nana::string text)  /// Append a new item.
+		{
+			this->get_drawer_trigger().insert(::nana::npos, std::move(text), value_type());
+			API::update_window(*this);
+		}
+
+		void insert(std::size_t pos, const std::string& text, const value_type& value = {})
+		{
+			this->insert(pos, static_cast<std::wstring>(nana::charset(text, nana::unicode::utf8)), value);
+		}
+
+		void insert(std::size_t pos, const std::wstring& text, const value_type& value = {})
+		{
+			if (pos > length())
+				throw std::out_of_range("tabbar::insert invalid position");
+
+			this->get_drawer_trigger().insert(pos, std::wstring(text), value_type(value));
+			API::update_window(*this);
+		}
+
+		//deprecated from 1.2.1, removed from 1.3
 		void relate(std::size_t pos, window wd)  /// Binds a window to an item specified by pos, if the item is selected, shows the window, otherwise, hides it.
 		{
-			this->get_drawer_trigger().relate(pos, wd);
+			this->get_drawer_trigger().attach(pos, wd);
+		}
+
+		void attach(std::size_t pos, window wd)
+		{
+			this->get_drawer_trigger().attach(pos, wd);
+		}
+
+		void erase(std::size_t pos)
+		{
+			this->get_drawer_trigger().erase(pos);
 		}
 
 		void tab_bgcolor(std::size_t i, const ::nana::color& clr)

source/gui/widgets/tabbar.cpp

@@ -30,6 +30,12 @@ namespace nana
 
 				::nana::color bgcolor;
 				::nana::color fgcolor;
+
+				item_t() = default;
+				
+				item_t(nana::string&& text, any && value)
+					: text(std::move(text)), value(std::move(value))
+				{}
 			};
 
 			class def_renderer
@@ -414,13 +420,13 @@ namespace nana
 					evt_agent_ = evt;
 				}
 
-				void push_back(const nana::string& text, const nana::any & value)
+				void insert(std::size_t pos, nana::string&& text, nana::any&& value)
 				{
-					item_t m;
+					if (pos >= list_.size())
-					m.text = text;
+						pos = list_.size();
-					m.value = value;
+
-					list_.push_back(m);
+					list_.emplace(iterator_at(pos), std::move(text), std::move(value));
-					activate(static_cast<size_t>(list_.size() - 1));
+					this->activate(pos);
 					render();
 				}
 
@@ -433,8 +439,12 @@ namespace nana
 				{
 					if(pos < list_.size())
 					{
-						if ((nullptr == evt_agent_) || evt_agent_->removed(pos))
+						bool close_attach = true;
+						if ((nullptr == evt_agent_) || evt_agent_->removed(pos, close_attach))
 						{
+							if (close_attach)
+								API::close_window(iterator_at(pos)->relative);
+							else
 								API::show_window(iterator_at(pos)->relative, false);
 							list_.erase(iterator_at(pos));
 							_m_adjust();
@@ -593,7 +603,7 @@ namespace nana
 					return basis_.active;
 				}
 
-				void relate(std::size_t pos, window wd)
+				void attach(std::size_t pos, window wd)
 				{
 					if(pos < list_.size())
 					{
@@ -1152,9 +1162,9 @@ namespace nana
 					layouter_->event_agent(evt);
 				}
 
-				void trigger::push_back(const nana::string& text, const nana::any& value)
+				void trigger::insert(std::size_t pos, nana::string&& text, nana::any&& value)
 				{
-					layouter_->push_back(text, value);
+					layouter_->insert(pos, std::move(text), std::move(value));
 				}
 
 				std::size_t trigger::length() const
@@ -1167,9 +1177,14 @@ namespace nana
 					return layouter_->toolbox_object().close_fly(fly);
 				}
 
-				void trigger::relate(std::size_t i, window wd)
+				void trigger::attach(std::size_t pos, window wd)
 				{
-					layouter_->relate(i, wd);
+					layouter_->attach(pos, wd);
+				}
+
+				void trigger::erase(std::size_t pos)
+				{
+					layouter_->erase(pos);
 				}
 
 				void trigger::tab_color(std::size_t i, bool is_bgcolor, const ::nana::color& clr)