Merge branch 'hotfix-1.6.2' of https://github.com/JamesBremner/nana into JamesBremner-hotfix-1.6.2

include/nana/gui/widgets/group.hpp

@@ -85,6 +85,9 @@ namespace nana{
 		/// Determines whether a specified option is checked, it throws an out_of_range if !(pos < number of options)
 		bool option_checked(std::size_t pos) const;
 
+		/// Change typeface of caption label ( does not effect child widgets )
+		void typeface( const nana::paint::font& font );
+
 		group& enable_format_caption(bool format);
 
 		group& collocate() noexcept;

include/nana/gui/widgets/slider.hpp

@@ -151,7 +151,13 @@ namespace nana
 		bool vertical() const;
 		void maximum(unsigned);
 		unsigned maximum() const;
-		void value(unsigned);
+
+		/** Set slider value
+            @param[in] v new value for slider.
+            v will be clipped to the range 0 to maximum
+        */
+		void value(int );
+
 		unsigned value() const;
 		unsigned move_step(bool forward);                         ///< Increase or decrease the value of slider.
 		unsigned adorn() const;

source/gui/widgets/group.cpp

@@ -27,7 +27,8 @@
 	if(empty())	\
 		throw std::logic_error("the group is invalid");
 
-namespace nana{
+namespace nana
+{
 
 static const char* field_title = "__nana_group_title__";
 static const char* field_options = "__nana_group_options__";
@@ -143,6 +144,7 @@ namespace nana{
     impl_->options.emplace_back(new checkbox(handle()));
     auto & opt = impl_->options.back();
 #endif
+
 		opt->transparent(true);
 		opt->caption(std::move(text));
 		impl_->place_content[field_options] << *opt;
@@ -352,5 +354,6 @@ namespace nana{
 		impl_->update_div();
 		impl_->place_content.collocate();
 	}
+
 }//end namespace nana
 

source/gui/widgets/slider.cpp

@@ -844,10 +844,14 @@ namespace nana
 			return get_drawer_trigger().get_model()->attribute().vmax;
 		}
 
-		void slider::value(unsigned v)
+		void slider::value(int v)
 		{
 			if(handle())
 			{
+			    // limit to positive values, vcur expects unsigned
+			    if( v < 0 )
+                    v = 0;
+
 				if(get_drawer_trigger().get_model()->vcur(v))
 					API::refresh_window(handle());
 			}