From 99a0cd2f8d219a939fdab32edf9fed588335ce06 Mon Sep 17 00:00:00 2001
From: Jinhao <cnjinhao@hotmail.com>
Date: Tue, 17 Oct 2017 03:35:04 +0800
Subject: [PATCH 1/2] fix issue that listbox selected event behaves incorrectly
 in single mode

In single selection mode, the selected event is firstly raised for the
deselecting item. It is different from the selected event in
multi-selection mode.
---
 source/gui/widgets/listbox.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/source/gui/widgets/listbox.cpp b/source/gui/widgets/listbox.cpp
index c49841c5..21a5f5f6 100644
--- a/source/gui/widgets/listbox.cpp
+++ b/source/gui/widgets/listbox.cpp
@@ -4166,16 +4166,16 @@ namespace nana
 								{
 									if (item_ptr->flags.selected != sel)
 									{
-										item_ptr->flags.selected = sel;
-										lister.emit_cs(abs_item_pos, true);
-
-										if (item_ptr->flags.selected)
+										if (sel)
 										{
 											lister.cancel_others_if_single_enabled(true, abs_item_pos);
 											essence_->lister.latest_selected_abs = abs_item_pos;
 										}
 										else if (essence_->lister.latest_selected_abs == abs_item_pos)
 											essence_->lister.latest_selected_abs.set_both(npos);
+
+										item_ptr->flags.selected = sel;
+										lister.emit_cs(abs_item_pos, true);
 									}
 								}
 								else

From 24bbfc649319d13821904c763da63ed088c8fbe3 Mon Sep 17 00:00:00 2001
From: Jinhao <cnjinhao@hotmail.com>
Date: Tue, 17 Oct 2017 06:49:39 +0800
Subject: [PATCH 2/2] small changes

---
 include/nana/basic_types.hpp         |  9 ++++++++-
 source/gui/detail/window_manager.cpp | 14 ++------------
 source/paint/graphics.cpp            |  2 +-
 3 files changed, 11 insertions(+), 14 deletions(-)

diff --git a/include/nana/basic_types.hpp b/include/nana/basic_types.hpp
index b190ea42..a041279b 100644
--- a/include/nana/basic_types.hpp
+++ b/include/nana/basic_types.hpp
@@ -312,7 +312,14 @@ namespace nana
 		/// @param lightness  in range of [0, 1]
 		color& from_hsl(double hue, double saturation, double lightness);	///< immutable alpha channel
 
-		color blend(const color& blending_color, double alpha) const;
+		/// Blends color
+		/**
+		 * Returns a color which is blended as this * (1 - fade_rate) + blending_color * fade_rate
+		 * @param blending_color Color to blend
+		 * @param fade_rate Blending rate for blending_color
+		 * @return a blended color
+		 */
+		color blend(const color& blending_color, double fade_rate) const;
 
 		/// Determines whether the color is completely transparent.
 		bool invisible() const;
diff --git a/source/gui/detail/window_manager.cpp b/source/gui/detail/window_manager.cpp
index e948aeec..476b657b 100644
--- a/source/gui/detail/window_manager.cpp
+++ b/source/gui/detail/window_manager.cpp
@@ -219,8 +219,6 @@ namespace detail
 			Key first;
 			Value second;
 
-			key_value_rep() = default;
-
 			key_value_rep(const Key& k)
 				: first(k), second{}
 			{
@@ -258,15 +256,7 @@ namespace detail
 		std::vector<key_value_rep> table_;
 	};
 
-	//class window_manager
-			struct window_handle_deleter
-			{
-				void operator()(basic_window* wd) const
-				{
-					delete wd;
-				}
-			};
-			
+	//class window_manager			
 			//struct wdm_private_impl
 			struct window_manager::wdm_private_impl
 			{
@@ -506,7 +496,7 @@ namespace detail
 				if (impl_->wd_register.available(owner))
 				{
 					if (owner->flags.destroying)
-						throw std::runtime_error("the specified owner is destory");
+						throw std::runtime_error("the specified owner is destoryed");
 
 #ifndef WIDGET_FRAME_DEPRECATED
 					native = (category::flags::frame == owner->other.category ?
diff --git a/source/paint/graphics.cpp b/source/paint/graphics.cpp
index f31f3afd..62f74016 100644
--- a/source/paint/graphics.cpp
+++ b/source/paint/graphics.cpp
@@ -271,7 +271,7 @@ namespace paint
 
 		graphics::operator bool() const noexcept
 		{
-			return impl_->handle;
+			return (impl_->handle != nullptr);
 		}
 
 		drawable_type graphics::handle() const