improve inputbox

include/nana/gui/msgbox.hpp

@@ -183,10 +183,28 @@ namespace nana
 			std::unique_ptr<implement> impl_;
 		};
 
+		class path
+			: public abstract_content
+		{
+			struct implement;
+		public:
+			path(::nana::string label, ::nana::string init_path = ::nana::string());
+			~path();
+
+			::nana::string value() const;
+		private:
+			//Implementation of abstract_content
+			const ::nana::string& label() const override;
+			window create(window, unsigned label_px) override;
+			unsigned fixed_pixels() const override;
+		private:
+			std::unique_ptr<implement> impl_;
+		};
+
 		inputbox(window, ::nana::string description, ::nana::string title = ::nana::string());
 
-		void image(::nana::paint::image, bool is_left);
-		void image_v(::nana::paint::image, bool is_top);
+		void image(::nana::paint::image, bool is_left, const rectangle& valid_area = {});
+		void image_v(::nana::paint::image, bool is_top, const rectangle& valid_area = {});
 
 		template<typename ...Args>
 		bool show(Args&& ... args)
@@ -231,6 +249,7 @@ namespace nana
 		::nana::string title_;
 		std::function<bool(window)> verifier_;
 		::nana::paint::image images_[4];
+		::nana::rectangle valid_areas_[4];
 	};
 }//end namespace nana
 

include/nana/gui/widgets/picture.hpp

@@ -46,7 +46,7 @@ namespace nana
 		: public widget_object<category::widget_tag, drawerbase::picture::drawer>
 	{
 	public:
-		picture();
+		picture() = default;
 		picture(window, bool visible);
 		picture(window, const rectangle& ={}, bool visible = true);