fix bug that transparent widget may not be updated in event handler(#431)

include/nana/gui/detail/bedrock.hpp

@@ -1,7 +1,7 @@
 /**
  *	A Bedrock 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
@@ -43,6 +43,20 @@ namespace detail
 
 		class flag_guard;
 
+		/// RAII class for window message processing
+		class root_guard
+		{
+		public:
+			/// Enables lazy_update
+			root_guard(bedrock& brock, basic_window* root_wd);
+
+			/// Disables lazy-update and clears update requesters queue.
+			~root_guard();
+		private:
+			bedrock& brock_;
+			basic_window* const root_wd_;
+		};
+
 		~bedrock();
 		void pump_event(window, bool is_modal);
 		void flush_surface(core_window_t*, bool forced, const rectangle* update_area = nullptr);

include/nana/gui/detail/window_manager.hpp

@@ -117,6 +117,7 @@ namespace detail
 		void map(core_window_t*, bool forced, const rectangle* update_area = nullptr);
 
 		bool update(core_window_t*, bool redraw, bool force, const rectangle* update_area = nullptr);
+		void update_requesters(core_window_t* root_wd);
 		void refresh_tree(core_window_t*);
 
 		void do_lazy_refresh(core_window_t*, bool force_copy_to_screen, bool refresh_tree = false);

source/gui/detail/bedrock_pi.cpp

@@ -91,9 +91,26 @@ namespace nana
 		private:
 			bedrock			*const brock_;
 			core_window_t	*const wd_;
-
 		};
 
+		//class root_guard
+		bedrock::root_guard::root_guard(bedrock& brock, basic_window* root_wd):
+			brock_(brock),
+			root_wd_(root_wd)
+		{
+			root_wd_->other.attribute.root->lazy_update = true;
+		}
+
+		bedrock::root_guard::~root_guard()
+		{
+			if (!brock_.wd_manager().available(root_wd_))
+				return;
+
+			root_wd_->other.attribute.root->lazy_update = false;
+			root_wd_->other.attribute.root->update_requesters.clear();
+		}
+		//end class root_guard
+
 		bedrock::core_window_t* bedrock::focus()
 		{
 			auto wd = wd_manager().root(native_interface::get_focus_window());

source/gui/detail/bedrock_posix.cpp

@@ -556,6 +556,7 @@ namespace detail
 			context.is_alt_pressed = false;
 	}
 
+#if 0
 	class window_proc_guard
 	{
 	public:
@@ -576,6 +577,7 @@ namespace detail
 	private:
 		detail::basic_window* const root_wd_;
 	};
+#endif
 
 	void window_proc_for_xevent(Display* /*display*/, XEvent& xevent)
 	{
@@ -593,7 +595,8 @@ namespace detail
 		{
 			auto const root_wd = root_runtime->window;
 			auto msgwnd = root_wd;
-			window_proc_guard wp_guard{ root_wd };
+
+			detail::bedrock::root_guard rw_guard{ brock, root_wd };
 
 			auto& context = *brock.get_thread_context(msgwnd->thread_id);
 
@@ -1215,14 +1218,8 @@ namespace detail
 				}
 			}
 
-			if (wd_manager.available(root_wd) && root_wd->other.attribute.root->update_requesters.size())
+
-			{
+			wd_manager.update_requesters(root_wd);
-				for (auto wd : root_wd->other.attribute.root->update_requesters)
-				{
-					window_layout::paint(wd, window_layout::paint_operation::have_refreshed, false);
-					wd_manager.map(wd, true);
-				}
-			}
 
 			root_runtime = wd_manager.root_runtime(native_window);
 			if(root_runtime)

source/gui/detail/bedrock_windows.cpp

@@ -740,27 +740,6 @@ namespace detail
 		return static_cast<wchar_t>(vkey);
 	}
 
-	class window_proc_guard
-	{
-	public:
-		window_proc_guard(detail::basic_window* wd) :
-			root_wd_(wd)
-		{
-			root_wd_->other.attribute.root->lazy_update = true;
-		}
-
-		~window_proc_guard()
-		{
-			if (!bedrock::instance().wd_manager().available(root_wd_))
-				return;
-
-			root_wd_->other.attribute.root->lazy_update = false;
-			root_wd_->other.attribute.root->update_requesters.clear();
-		}
-	private:
-		detail::basic_window* const root_wd_;
-	};
-
 	LRESULT CALLBACK Bedrock_WIN32_WindowProc(HWND root_window, UINT message, WPARAM wParam, LPARAM lParam)
 	{
 		LRESULT window_proc_value = 0;
@@ -793,7 +772,7 @@ namespace detail
 			auto const root_wd = root_runtime->window;
 			auto msgwnd = root_wd;
 
-			window_proc_guard wp_guard{ root_wd };
+			detail::bedrock::root_guard rw_guard{ brock, root_wd };
 
 			switch (message)
 			{
@@ -1577,14 +1556,7 @@ namespace detail
 				def_window_proc = true;
 			}
 
-			if (wd_manager.available(root_wd) && root_wd->other.attribute.root->update_requesters.size())
+			wd_manager.update_requesters(root_wd);
-			{
-				for (auto wd : root_wd->other.attribute.root->update_requesters)
-				{
-					window_layout::paint(wd, window_layout::paint_operation::have_refreshed, false);
-					wd_manager.map(wd, true);
-				}
-			}
 
 			root_runtime = wd_manager.root_runtime(native_window);
 			if(root_runtime)

source/gui/detail/window_manager.cpp

@@ -1051,6 +1051,29 @@ namespace detail
 			return true;
 		}
 
+		void window_manager::update_requesters(core_window_t* root_wd)
+		{
+			//Thread-Safe Required!
+			std::lock_guard<mutex_type> lock(mutex_);
+
+			if (this->available(root_wd) && root_wd->other.attribute.root->update_requesters.size())
+			{
+				for (auto wd : root_wd->other.attribute.root->update_requesters)
+				{
+					using paint_operation = window_layer::paint_operation;
+					if (!this->available(wd))
+						continue;
+
+					//#431
+					//Redraws the widget when it has beground effect.
+					//Because the widget just redraw if it didn't have bground effect when it was inserted to the update_requesters queue
+					window_layer::paint(wd, (wd->effect.bground ? paint_operation::try_refresh : paint_operation::have_refreshed), false);
+					this->map(wd, true);
+				}
+			}
+
+		}
+
 		void window_manager::refresh_tree(core_window_t* wd)
 		{
 			//Thread-Safe Required!