Merge branch 'hotfix-1.7.2' into develop

.travis.yml

@@ -44,7 +44,7 @@ matrix:
 
 before_install:
   - cd ..
-  - git clone --depth=1 --branch=develop https://github.com/qPCR4vir/nana-demo.git nana-demo
+  - git clone --depth=1 --branch=master https://github.com/qPCR4vir/nana-demo.git nana-demo
   - export PATH="$HOME/bin:$PATH"
   - wget --no-check-certificate --no-clobber -O /tmp/tools/cmake https://cmake.org/files/v3.12/cmake-3.12.0-rc3-Linux-x86_64.sh || true
   - chmod -R +x /tmp/tools

build/cmake/compilers.cmake

@@ -38,13 +38,7 @@ if(CMAKE_COMPILER_IS_GNUCXX OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang") #  AN
 endif()
 
 
-if (APPLE AND "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")                    # APPLE Clang
-    target_compile_options(nana PUBLIC -stdlib=libstdc++)
-endif ()
-
-
 
 if("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
     target_compile_options(nana PRIVATE -fmax-errors=3)
 endif()
-

include/nana/c++defines.hpp

@@ -89,7 +89,7 @@
 		#define NANA_MINGW
 	#endif // MINGW
 
-#elif defined(APPLE)	//Mac OS X
+#elif defined(__APPLE__) || defined(APPLE)	//Mac OS X
 	//Symbols for MACOS
 	#define NANA_MACOS
 	#define NANA_POSIX

include/nana/filesystem/filesystem.hpp

@@ -560,7 +560,7 @@ namespace std {
 #endif
 	}
 } // std
-#else
+#else //#if NANA_USING_NANA_FILESYSTEM
 //Implements the missing functions for various version of experimental/filesystem
 	namespace std
 	{
@@ -568,7 +568,7 @@ namespace std {
 		{
 			//Visual Studio 2017
 #if			(defined(NANA_USING_STD_EXPERIMENTAL_FILESYSTEM) && defined(_MSC_VER) && (_MSC_VER > 1912)) ||	\
-				(!defined(__clang__) && defined(__GNUC__) && (__cplusplus < 201603))
+				(!defined(__clang__) && defined(__GNUC__) && (__cplusplus < 201603 || (__GNUC__* 100 + __GNUC_MINOR__ < 801)))
 			path weakly_canonical(const path& p);
 			path weakly_canonical(const path& p, std::error_code& err);
 #endif

include/nana/gui/timer.hpp

@@ -48,7 +48,7 @@ namespace nana
 		template<typename Function>
 		void elapse(Function && fn)
 		{
-			elapse_.connect(std::forward<Function>(fn));
+			elapse_->connect(std::forward<Function>(fn));
 		}
 
 		void reset();
@@ -66,7 +66,7 @@ namespace nana
 	private:
 		unsigned _m_interval() const;
 	private:
-		nana::basic_event<arg_elapse> elapse_;
+		std::shared_ptr<nana::basic_event<arg_elapse>> elapse_;
 		implement * const impl_;
 	};
 }//end namespace nana

source/charset.cpp

@@ -1,7 +1,7 @@
 /**
  *	A Character Encoding Set Implementation
  *	Nana C++ Library(http://www.nanapro.org)
- *	Copyright(C) 2003-2018 Jinhao(cnjinhao@hotmail.com)
+ *	Copyright(C) 2003-2019 Jinhao(cnjinhao@hotmail.com)
  *
  *	Distributed under the Boost Software License, Version 1.0.
  *	(See accompanying file LICENSE_1_0.txt or copy at
@@ -245,8 +245,12 @@ namespace nana
 			int bytes = ::WideCharToMultiByte(CP_ACP, 0, s, -1, 0, 0, 0, 0);
 			if(bytes > 1)
 			{
-				mbstr.resize(bytes - 1);
+				// the bytes is the length of the string with null character.
-				::WideCharToMultiByte(CP_ACP, 0, s, -1, &(mbstr[0]), bytes - 1, 0, 0);
+				mbstr.resize(bytes);
+				::WideCharToMultiByte(CP_ACP, 0, s, -1, &(mbstr[0]), bytes, 0, 0);
+
+				//Remove the null character written by WideCharToMultiByte
+				mbstr.pop_back();
 			}
 			return true;
 #else
@@ -279,8 +283,12 @@ namespace nana
 			int chars = ::MultiByteToWideChar(CP_ACP, 0, s, -1, 0, 0);
 			if(chars > 1)
 			{
-				wcstr.resize(chars - 1);
+				// the length of the string with null character.
-				::MultiByteToWideChar(CP_ACP, 0, s, -1, &wcstr[0], chars - 1);
+				wcstr.resize(chars);
+				::MultiByteToWideChar(CP_ACP, 0, s, -1, &wcstr[0], chars);
+
+				// remove the null character written by MultiByteToWideChar
+				wcstr.pop_back();
 			}
 #else
 			locale_initializer::init();

source/filesystem/filesystem.cpp

@@ -1407,7 +1407,7 @@ namespace std
 		namespace filesystem
 		{
 #if		(defined(NANA_USING_STD_EXPERIMENTAL_FILESYSTEM) && defined(_MSC_VER) && (_MSC_VER > 1912)) ||	\
-			(!defined(__clang__) && defined(__GNUC__) && (__cplusplus < 201603))
+			(!defined(__clang__) && defined(__GNUC__) && (__cplusplus < 201603 || (__GNUC__* 100 + __GNUC_MINOR__ < 801)))
 
 			namespace detail
 			{

source/gui/detail/bedrock_posix.cpp

@@ -622,6 +622,7 @@ namespace detail
 				}
 				break;
 			case ConfigureNotify:
+				++(root_runtime->x11msg.config);
 				if(msgwnd->dimension.width != static_cast<unsigned>(xevent.xconfigure.width) || msgwnd->dimension.height != static_cast<unsigned>(xevent.xconfigure.height))
 				{
 					auto & cf = xevent.xconfigure;
@@ -890,7 +891,12 @@ namespace detail
 			case MapNotify:
 			case UnmapNotify:
 				if(xevent.type == MapNotify)
+				{
+					++(root_runtime->x11msg.map);
 					x11_apply_exposed_position(native_window);
+				}
+				else
+					++(root_runtime->x11msg.unmap);
 
 				brock.event_expose(msgwnd, (xevent.type == MapNotify));
 				context.platform.motion_window = nullptr;

source/gui/detail/bedrock_windows.cpp

@@ -173,15 +173,22 @@ namespace detail
 
 	static LRESULT WINAPI Bedrock_WIN32_WindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
 
+	HINSTANCE windows_module_handle()
+	{
+		MEMORY_BASIC_INFORMATION mbi;
+		static int dummy;
+		VirtualQuery(&dummy, &mbi, sizeof(mbi));
+		return reinterpret_cast<HINSTANCE>(mbi.AllocationBase);
+	}
+
 	bedrock::bedrock()
 		:	pi_data_(new pi_data),
 			impl_(new private_impl)
 	{
 		nana::detail::platform_spec::instance(); //to guaranty the platform_spec object is initialized before using.
 
-
 		WNDCLASSEX wincl;
-		wincl.hInstance = ::GetModuleHandle(0);
+		wincl.hInstance = windows_module_handle();
 		wincl.lpszClassName = L"NanaWindowInternal";
 		wincl.lpfnWndProc = &Bedrock_WIN32_WindowProc;
 		wincl.style = CS_DBLCLKS | CS_OWNDC;
@@ -229,6 +236,8 @@ namespace detail
 
 		delete impl_;
 		delete pi_data_;
+
+		::UnregisterClass(L"NanaWindowInternal", windows_module_handle());
 	}
 
 

source/gui/detail/inner_fwd_implement.hpp

@@ -21,6 +21,10 @@
 
 #include <map>
 
+#ifdef NANA_X11
+#	include <atomic>
+#endif
+
 namespace nana{
 	namespace detail
 	{
@@ -75,6 +79,15 @@ namespace nana{
 			root_misc(root_misc&&);
 			root_misc(basic_window * wd, unsigned width, unsigned height);
 			~root_misc();
+
+#ifdef NANA_X11
+			struct x11msg_confirm
+			{
+				std::atomic<std::size_t> config{ 0 };
+				std::atomic<std::size_t> map{ 0 };
+				std::atomic<std::size_t> unmap{ 0 };
+			}x11msg;
+#endif
 		private:
 			root_misc(const root_misc&) = delete;
 			root_misc& operator=(const root_misc&) = delete;

source/gui/detail/native_window_interface.cpp

@@ -17,14 +17,15 @@
 #include <nana/gui/detail/window_manager.hpp>
 
 #if defined(NANA_WINDOWS)
-	#if defined(STD_THREAD_NOT_SUPPORTED)
+#	if defined(STD_THREAD_NOT_SUPPORTED)
-        #include <nana/std_mutex.hpp>
+#		include <nana/std_mutex.hpp>
-    #else
+#	else
-        #include <mutex>
+#		include <mutex>
-	#endif
+#	endif
-	#include <map>
+#	include <map>
 #elif defined(NANA_X11)
-	#include <nana/system/platform.hpp>
+#	include <nana/system/platform.hpp>
+#	include "inner_fwd_implement.hpp"
 #endif
 
 #include "../../paint/image_accessor.hpp"
@@ -34,6 +35,10 @@ namespace nana{
 	namespace detail{
 
 #if defined(NANA_WINDOWS)
+
+		//This function is defined in bedrock_windows.cpp
+	HINSTANCE windows_module_handle();
+
 	class tray_manager
 	{
 		struct window_extra_t
@@ -199,26 +204,87 @@ namespace nana{
 
 		namespace x11_wait
 		{
+			struct param
+			{
+				Window handle;
+				root_misc * misc;
+				std::size_t comp_value;
+			};
+
 			static Bool configure(Display *disp, XEvent *evt, char *arg)
 			{
-			    return disp && evt && arg && (evt->type == ConfigureNotify) && (evt->xconfigure.window == *reinterpret_cast<Window*>(arg));
+				auto p = reinterpret_cast<param*>(arg);
+				if(p)
+				{
+					if(p->misc->x11msg.config != p->comp_value)
+						return true;
+
+					if(disp && evt && (evt->type == ConfigureNotify))
+					{
+						if(evt->xconfigure.window == p->handle)
+							return true;
+					}
+				}
+				return false;
 			}
 
 			static Bool map(Display *disp, XEvent *evt, char *arg)
 			{
-			    return disp && evt && arg && (evt->type == MapNotify) && (evt->xmap.window == *reinterpret_cast<Window*>(arg));
+				auto p = reinterpret_cast<param*>(arg);
+				if(p)
+				{
+					if(p->misc->x11msg.map != p->comp_value)
+						return true;
+
+					if(disp && evt && (evt->type == MapNotify))
+					{
+						if(evt->xmap.window == p->handle)
+							return true;
+					}
+				}
+				return false;
 			}
 
 			static Bool unmap(Display *disp, XEvent *evt, char *arg)
 			{
-			    return disp && evt && arg && (evt->type == MapNotify) && (evt->xunmap.window == *reinterpret_cast<Window*>(arg));
+				auto p = reinterpret_cast<param*>(arg);
+				if(p)
+				{
+					if(p->misc->x11msg.unmap != p->comp_value)
+						return true;
+
+					if(disp && evt && (evt->type == UnmapNotify))
+					{
+						if(evt->xunmap.window == p->handle)
+							return true;
+					}
+				}
+				return false;
 			}
 		}
 
-		static void x11_wait_for(Window wd, Bool(*pred_fn)(Display*, XEvent*, char*))
+		static void x11_wait_for(Window wd, Bool(*pred_fn)(Display*, XEvent*, char*), std::size_t comp_value)
 		{
+			auto misc = bedrock::instance().wd_manager().root_runtime(reinterpret_cast<native_window_type>(wd));
+			x11_wait::param p;
+			p.handle = wd;
+			p.misc = misc;
+
+			if(pred_fn == &x11_wait::configure)
+				p.comp_value = misc->x11msg.config;
+			else if(pred_fn == &x11_wait::map)
+				p.comp_value = misc->x11msg.map;
+			else if(pred_fn == &x11_wait::unmap)
+				p.comp_value = misc->x11msg.unmap;
+
+			//Checks whether the msg is received.
+			if(p.comp_value != comp_value)
+				return;
+
+			p.comp_value = comp_value;
+
 			XEvent dummy;
-			::XPeekIfEvent(restrict::spec.open_display(), &dummy, pred_fn, reinterpret_cast<XPointer>(&wd));
+			::XPeekIfEvent(restrict::spec.open_display(), &dummy, pred_fn, reinterpret_cast<XPointer>(&p));
 		}
 #endif
 
@@ -315,7 +381,7 @@ namespace nana{
 			HWND native_wd = ::CreateWindowEx(style_ex, L"NanaWindowInternal", L"Nana Window",
 											style,
 											pt.x, pt.y, 100, 100,
-											reinterpret_cast<HWND>(owner), 0, ::GetModuleHandle(0), 0);
+											reinterpret_cast<HWND>(owner), 0, windows_module_handle(), 0);
 
 			//A window may have a border, this should be adjusted the client area fit for the specified size.
 			::RECT client;
@@ -504,7 +570,7 @@ namespace nana{
 										WS_CHILD | WS_VISIBLE | WS_TABSTOP  | WS_CLIPSIBLINGS,
 										r.x, r.y, r.width, r.height,
 										reinterpret_cast<HWND>(parent),	// The window is a child-window to desktop
-										0, ::GetModuleHandle(0), 0);
+										0, windows_module_handle(), 0);
 #elif defined(NANA_X11)
 			nana::detail::platform_scope_guard psg;
 
@@ -758,13 +824,17 @@ namespace nana{
 				if(show == is_window_visible(wd))
 					return;
 
+				auto misc = bedrock::instance().wd_manager().root_runtime(wd);
+
 				if(show)
 				{
+					std::size_t cmp_value = misc->x11msg.map;
+
 					::XMapWindow(disp, reinterpret_cast<Window>(wd));
 
 					//Wait for the mapping notify to update the local attribute of visibility so that
 					//the followed window_visible() call can return the updated visibility value.
-					x11_wait_for(reinterpret_cast<Window>(wd), x11_wait::map);
+					x11_wait_for(reinterpret_cast<Window>(wd), x11_wait::map, cmp_value);
 					
 					Window grab = restrict::spec.grab(0);
 					if(grab == reinterpret_cast<Window>(wd))
@@ -772,10 +842,12 @@ namespace nana{
 				}
 				else
 				{
+					std::size_t cmp_value = misc->x11msg.unmap;
 					::XUnmapWindow(disp, reinterpret_cast<Window>(wd));
+
 					//Wait for the mapping notify to update the local attribute of visibility so that
 					//the followed window_visible() call can return the updated visibility value.
-					x11_wait_for(reinterpret_cast<Window>(wd), x11_wait::unmap);
+					x11_wait_for(reinterpret_cast<Window>(wd), x11_wait::unmap, cmp_value);
 				}
 			}
 			static_cast<void>(active);	//eliminate unused parameter compiler warning.
@@ -1019,11 +1091,15 @@ namespace nana{
 				y += origin_y;
 			}
 
+			auto misc = bedrock::instance().wd_manager().root_runtime(reinterpret_cast<native_window_type>(wd));
+			std::size_t cmp_value = misc->x11msg.config;
+
 			::XMoveWindow(disp, reinterpret_cast<Window>(wd), x, y);
 
 			//Wait for the configuration notify to update the local attribute of position so that
 			//the followed window_position() call can return the updated position value.
-			x11_wait_for(reinterpret_cast<Window>(wd), x11_wait::configure);
+
+			x11_wait_for(reinterpret_cast<Window>(wd), x11_wait::configure, cmp_value);
 #endif
 		}
 
@@ -1109,6 +1185,9 @@ namespace nana{
 				y += origin_y;
 			}
 
+			auto misc = bedrock::instance().wd_manager().root_runtime(reinterpret_cast<native_window_type>(wd));
+			std::size_t cmp_value = misc->x11msg.config;
+
 			::XMoveResizeWindow(disp, reinterpret_cast<Window>(wd), x, y, r.width, r.height);
 
 			//Wait for the configuration notify to update the local attribute of position so that
@@ -1116,7 +1195,7 @@ namespace nana{
 
 			//It seems that XMoveResizeWindow doesn't need x11_wait_for. But x11_wait_for is still called
 			//to make sure the local attribute is updated.
-			x11_wait_for(reinterpret_cast<Window>(wd), x11_wait::configure);
+			x11_wait_for(reinterpret_cast<Window>(wd), x11_wait::configure, cmp_value);
 
 			return true;
 #endif
@@ -1283,11 +1362,15 @@ namespace nana{
 				hints.min_height = hints.max_height = sz.height;
 				::XSetWMNormalHints(disp, reinterpret_cast<Window>(wd), &hints);
 			}
+
+			auto misc = bedrock::instance().wd_manager().root_runtime(reinterpret_cast<native_window_type>(wd));
+			std::size_t cmp_value = misc->x11msg.config;
+
 			::XResizeWindow(disp, reinterpret_cast<Window>(wd), sz.width, sz.height);
 			
 			//It seems that XResizeWindow doesn't need x11_wait_for. But x11_wait_for is still called
 			//to make sure the local attribute is updated.
-			x11_wait_for(reinterpret_cast<Window>(wd), x11_wait::configure);
+			x11_wait_for(reinterpret_cast<Window>(wd), x11_wait::configure, cmp_value);
 			return true;
 #endif
 		}

source/gui/filebox.cpp

@@ -1517,6 +1517,15 @@ namespace nana
 			path_type parent_path{ str };
 			str += (len + 1);
 			
+			// if only one file was selected, the ofn.lpstrFile
+			// is returning only that file, without any parent
+			if (!*str)
+			{
+				targets.emplace_back(parent_path);
+				impl_->path = parent_path.parent_path().u8string();
+			}
+			else
+			{
 				while(*str)
 				{
 					len = ::wcslen(str);
@@ -1525,6 +1534,7 @@ namespace nana
 				}
 				impl_->path = parent_path.u8string();
 			}
+		}
 		else
 		{
 			wfile.resize(std::wcslen(wfile.data()));

source/gui/place_parts.hpp

@@ -146,6 +146,7 @@ namespace nana
 
 				//draw caption
 				auto text = to_wstring(API::window_caption(window_handle_));
+				if((graph.size().width > 20) && (graph.size().width - 20 > 10))
 					text_rd_->render({ 3, 1 }, text.data(), text.size(), graph.size().width - 20, paint::text_renderer::mode::truncate_with_ellipsis);
 
 				//draw x button

source/gui/timer.cpp

@@ -111,13 +111,13 @@ namespace nana
 	{
 	public:
 #if defined(NANA_WINDOWS)
-		timer_core(timer* sender, timer_identifier tmid, basic_event<arg_elapse>& evt_elapse):
+		timer_core(timer* sender, timer_identifier tmid, std::shared_ptr<basic_event<arg_elapse>> evt_elapse):
 			sender_(sender),
 			timer_(tmid),
 			evt_elapse_(evt_elapse)
 		{}
 #else
-		timer_core(timer* sender, basic_event<arg_elapse>& evt_elapse):
+		timer_core(timer* sender, std::shared_ptr<basic_event<arg_elapse>> evt_elapse):
 			sender_(sender),
 			timer_(this),
 			evt_elapse_(evt_elapse)
@@ -142,12 +142,15 @@ namespace nana
 		{
 			arg_elapse arg;
 			arg.sender = sender_;
-			evt_elapse_.emit(arg, nullptr);
+
+			//retain the object to avoid it to be deleted during calling of emit
+			auto retain = evt_elapse_;
+			retain->emit(arg, nullptr);
 		}
 	private:
 		timer * const sender_;
 		const timer_identifier timer_;
-		nana::basic_event<arg_elapse> & evt_elapse_;
+		std::shared_ptr<nana::basic_event<arg_elapse>> evt_elapse_;
 	}; //end class timer_core
 
 
@@ -175,8 +178,9 @@ namespace nana
 	};
 
 	//class timer
-		timer::timer()
+		timer::timer():
-			: impl_(new implement)
+			elapse_(std::make_shared<nana::basic_event<arg_elapse>>()),
+			impl_(new implement)
 		{
 		}
 		
@@ -195,7 +199,7 @@ namespace nana
 		void timer::reset()
 		{
 			stop();
-			elapse_.clear();
+			elapse_->clear();
 		}
 
 		void timer::start()

source/gui/widgets/listbox.cpp

@@ -2314,7 +2314,8 @@ namespace nana
 				size_type count_of_exposed(bool with_rest) const
 				{
 					auto lister_s = this->content_view->view_area().height;
-					return (lister_s / item_height()) + (with_rest && (lister_s % item_height()) ? 1 : 0);
+					return (lister_s / item_height()) + (with_rest && 
+						listbox_ptr->scroll_operation()->visible(true) && (lister_s % item_height()) ? 1 : 0);
 				}
 
 				void update(bool ignore_auto_draw = false) noexcept
@@ -3338,16 +3339,27 @@ namespace nana
 					return false;
 				}
 
+                // init ir end to grab a header
 				void grab(const nana::point& pos, bool is_grab)
 				{
-					if(is_grab)
+					if(is_grab)                                      // init grabbing the header
 					{
 						grabs_.start_pos = pos.x;
-						if(grabs_.splitter != npos)  // resize header item, not move it
+						if(grabs_.splitter == npos)                // No splitter,  no resize header, just moving
+						    return;
+
+						                                   // splitter grabbed - resize the header: take initial width
 						grabs_.item_width = essence_->header.at(grabs_.splitter).width_px;
 					}
-					else if((grab_terminal_.index != npos) && (grab_terminal_.index != essence_->pointer_where.second))
+					else                                           // end to grab the header
-						essence_->header.move(essence_->pointer_where.second, grab_terminal_.index, grab_terminal_.place_front);
+					    if (grabs_.splitter != npos)           // some Splitter grab, just resizing, no need to move
+					        return;
+					    else if(    (grab_terminal_.index != npos)
+					             && (grab_terminal_.index != essence_->pointer_where.second) )
+                                // move header to terminal position
+                                essence_->header.move(essence_->pointer_where.second,          // from
+                                                      grab_terminal_.index,                    // to
+                                                      grab_terminal_.place_front);
 				}
 
 				//grab_move
@@ -4295,7 +4307,10 @@ namespace nana
 					auto const good_list_r = essence_->rect_lister(list_r);
 
 					auto & ptr_where = essence_->pointer_where;
-					if((ptr_where.first == parts::header) && (ptr_where.second != npos || (drawer_header_->splitter() != npos)))
+
+					if(    (ptr_where.first == parts::header)             // click on header
+					    && (    ptr_where.second != npos                  // in ..
+					        || (drawer_header_->splitter() != npos)))     // or splitter
 					{
 						essence_->ptr_state = item_state::pressed;
 						if(good_head_r)
@@ -4304,7 +4319,8 @@ namespace nana
 							update = true;
 						}
 					}
-					else if(ptr_where.first == parts::list || ptr_where.first == parts::checker)
+					else if(   ptr_where.first == parts::list             // click on list
+					        || ptr_where.first == parts::checker)         // on a checker
 					{
 						index_pair item_pos = lister.advance(essence_->first_display(), static_cast<int>(ptr_where.second));
 
@@ -4477,13 +4493,16 @@ namespace nana
 					bool need_refresh = false;
 
 					//Don't sort the column when the mouse is due to released for stopping resizing column.
-					if ((drawer_header_->splitter() == npos) && essence_->header.attrib().sortable && essence_->pointer_where.first == parts::header && prev_state == item_state::pressed)
+					if (    (drawer_header_->splitter() == npos)              // no header splitter was selected
+					     && essence_->header.attrib().sortable
+					     && essence_->pointer_where.first == parts::header
+					     && prev_state == item_state::pressed)
 					{
 						//Try to sort the column
 						if(essence_->pointer_where.second < essence_->header.cont().size())
 							need_refresh = essence_->lister.sort_column(essence_->pointer_where.second, nullptr);
 					}
-					else if (item_state::grabbed == prev_state)
+					else if (item_state::grabbed == prev_state)       // selected splitter and grabbed
 					{
 						nana::point pos = arg.pos;
 						essence_->widget_to_header(pos);
@@ -6095,7 +6114,15 @@ namespace nana
 
 		auto listbox::last_visible() const -> index_pair
 		{
-			return _m_ess().lister.advance(_m_ess().first_display(), static_cast<int>(_m_ess().count_of_exposed(true)));
+			if(!const_cast<listbox*>(this)->scroll_operation()->visible(true))
+			{
+				auto last_cat = size_categ()-1;
+				index_pair ip(last_cat, at(last_cat).size()-1);
+				if(last_cat == 0 && ip.item == npos) // if the listbox is empty
+					ip.cat = npos; // return empty index_pair
+				return ip;
+			}
+			return _m_ess().lister.advance(_m_ess().first_display(), static_cast<int>(_m_ess().count_of_exposed(true)-1));
 		}
 
 		auto listbox::visibles() const -> index_pairs

source/gui/widgets/toolbar.cpp

@@ -104,6 +104,7 @@ namespace nana
 						delete ptr;
 
 					cont_.clear();
+					right_ = npos;
 				}
 
 
@@ -683,6 +684,7 @@ namespace nana
 				if(m && (m->textout != show))
 				{
 					m->textout = show;
+					m->pixels = 0; //force width calculation
 					API::refresh_window(this->handle());
 				}
 			}