diff --git a/include/nana/gui/detail/window_manager.hpp b/include/nana/gui/detail/window_manager.hpp
index b04c32dc..0b1f51c9 100644
--- a/include/nana/gui/detail/window_manager.hpp
+++ b/include/nana/gui/detail/window_manager.hpp
@@ -1,7 +1,7 @@
 /*
  *	Window Manager Implementation
  *	Nana C++ Library(http://www.nanapro.org)
- *	Copyright(C) 2003-2014 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
@@ -129,7 +129,7 @@ namespace detail
 		bool update(core_window_t*, bool redraw, bool force, const rectangle* update_area = nullptr);
 		void refresh_tree(core_window_t*);
 
-		bool do_lazy_refresh(core_window_t*, bool force_copy_to_screen);
+		bool do_lazy_refresh(core_window_t*, bool force_copy_to_screen, bool refresh_tree = false);
 
 		bool get_graphics(core_window_t*, nana::paint::graphics&);
 		bool get_visual_rectangle(core_window_t*, nana::rectangle&);
diff --git a/source/gui/detail/bedrock_posix.cpp b/source/gui/detail/bedrock_posix.cpp
index a7e20ee4..052a61aa 100644
--- a/source/gui/detail/bedrock_posix.cpp
+++ b/source/gui/detail/bedrock_posix.cpp
@@ -389,9 +389,13 @@ namespace detail
 
 		_m_emit_core(evt_code, wd, false, arg);
 
-		if(ask_update)
-			wd_manager().do_lazy_refresh(wd, false);
-		else
+		//A child of wd may not be drawn if it was out of wd's range before wd resized,
+		//so refresh all children of wd when a resized occurs.
+		if(ask_update || (event_code::resized == evt_code))
+		{
+			wd_manager().do_lazy_refresh(wd, false, (event_code::resized == evt_code));
+		}
+		else if(wd_manager().available(wd))
 			wd->other.upd_state = core_window_t::update_state::none;
 
 		if(thrd) thrd->event_window = prev_wd;
diff --git a/source/gui/detail/bedrock_windows.cpp b/source/gui/detail/bedrock_windows.cpp
index 8f5a319e..bf1b5c28 100644
--- a/source/gui/detail/bedrock_windows.cpp
+++ b/source/gui/detail/bedrock_windows.cpp
@@ -1779,8 +1779,12 @@ namespace detail
 
 		_m_emit_core(evt_code, wd, false, arg);
 
-		if (ask_update)
-			wd_manager().do_lazy_refresh(wd, false);
+		//A child of wd may not be drawn if it was out of wd's range before wd resized,
+		//so refresh all children of wd when a resized occurs.
+		if (ask_update || (event_code::resized == evt_code))
+		{
+			wd_manager().do_lazy_refresh(wd, false, (event_code::resized == evt_code));
+		}
 		else if (wd_manager().available(wd))
 			wd->other.upd_state = basic_window::update_state::none;
 
@@ -1790,7 +1794,7 @@ namespace detail
 
 	bool bedrock::emit_drawer(event_code evt_code, core_window_t* wd, const ::nana::event_arg& arg, thread_context* thrd)
 	{
-		if (bedrock_object.wd_manager().available(wd) == false)
+		if (wd_manager().available(wd) == false)
 			return false;
 
 		core_window_t* prev_event_wd;
diff --git a/source/gui/detail/window_manager.cpp b/source/gui/detail/window_manager.cpp
index 4aa19757..6096d543 100644
--- a/source/gui/detail/window_manager.cpp
+++ b/source/gui/detail/window_manager.cpp
@@ -1,7 +1,7 @@
 /*
  *	Window Manager 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
@@ -833,7 +833,7 @@ namespace detail
 		//do_lazy_refresh
 		//@brief: defined a behavior of flush the screen
 		//@return: it returns true if the wnd is available
-		bool window_manager::do_lazy_refresh(core_window_t* wd, bool force_copy_to_screen)
+		bool window_manager::do_lazy_refresh(core_window_t* wd, bool force_copy_to_screen, bool refresh_tree)
 		{
 			//Thread-Safe Required!
 			std::lock_guard<decltype(mutex_)> lock(mutex_);
@@ -848,7 +848,7 @@ namespace detail
 				{
 					if ((wd->other.upd_state == core_window_t::update_state::refresh) || force_copy_to_screen)
 					{
-						window_layer::paint(wd, false, false);
+						window_layer::paint(wd, false, refresh_tree);
 						this->map(wd, force_copy_to_screen);
 					}
 					else if (effects::edge_nimbus::none != wd->effect.edge_nimbus)
@@ -857,7 +857,7 @@ namespace detail
 					}
 				}
 				else
-					window_layer::paint(wd, true, false);	//only refreshing if it has an invisible parent
+					window_layer::paint(wd, true, refresh_tree);	//only refreshing if it has an invisible parent
 			}
 			wd->other.upd_state = core_window_t::update_state::none;
 			return true;