diff --git a/source/gui/detail/native_window_interface.cpp b/source/gui/detail/native_window_interface.cpp
index 8d3dd9c8..fcf7f695 100644
--- a/source/gui/detail/native_window_interface.cpp
+++ b/source/gui/detail/native_window_interface.cpp
@@ -848,12 +848,17 @@ namespace nana{
 #endif
 		}
 
-		void native_interface::refresh_window(native_window_type wd)
+		void native_interface::refresh_window(native_window_type native_wd)
 		{
 #if defined(NANA_WINDOWS)
-			::InvalidateRect(reinterpret_cast<HWND>(wd), nullptr, true);
+			auto wd = reinterpret_cast<HWND>(native_wd);
+			RECT r;
+			::GetClientRect(wd, &r);
+			::InvalidateRect(wd, &r, FALSE);
 #elif defined(NANA_X11)
-			static_cast<void>(wd); //eliminate unused parameter compiler warning.
+			Display * disp = restrict::spec.open_display();
+			::XClearArea(disp, reinterpret_cast<Window>(native_wd), 0, 0, 1, 1, true);
+			::XFlush(disp);
 #endif
 		}
 
@@ -1110,14 +1115,10 @@ namespace nana{
 			if(owner && (owner != reinterpret_cast<native_window_type>(restrict::spec.root_window())))
 			{
 				auto origin = window_position(owner);
-#if 0
-				x += origin.x;
-				y += origin.y;
-#else
+
 				auto owner_extents = window_frame_extents(owner);
 				x += origin.x + owner_extents.left;
 				y += origin.y + owner_extents.top;
-#endif
 			}
 
 			::XMoveResizeWindow(disp, reinterpret_cast<Window>(wd), x, y, r.width, r.height);
diff --git a/source/gui/detail/window_manager.cpp b/source/gui/detail/window_manager.cpp
index 9d8ebd65..c9184053 100644
--- a/source/gui/detail/window_manager.cpp
+++ b/source/gui/detail/window_manager.cpp
@@ -1091,6 +1091,12 @@ namespace detail
 			std::lock_guard<mutex_type> lock(mutex_);
 			if (impl_->wd_register.available(wd) == false) return false;
 
+			if ((wd->other.category == category::flags::root) && wd->is_draw_through())
+			{
+				native_interface::refresh_window(wd->root);
+				return true;
+			}
+
 			if (wd->displayed())
 			{
 				using paint_operation = window_layer::paint_operation;
diff --git a/source/gui/programming_interface.cpp b/source/gui/programming_interface.cpp
index 1f3ac8c9..9791d2fd 100644
--- a/source/gui/programming_interface.cpp
+++ b/source/gui/programming_interface.cpp
@@ -962,7 +962,6 @@ namespace API
 		restrict::wd_manager().update(reinterpret_cast<basic_window*>(wd), false, true);
 	}
 
-
 	void window_caption(window wd, const std::string& title_utf8)
 	{
 		throw_not_utf8(title_utf8);