Merge branch 'hotfix-1.4.1' into develop

source/gui/widgets/group.cpp

@@ -12,6 +12,9 @@
  *	@Author: Stefan Pfeifer(st-321), Ariel Vina-Rodriguez (qPCR4vir)
  *
  *	@brief group is a widget used to visually group and layout other widgets.
+ *
+ * 	@contributor:
+ *		dankan1890(https://github.com/dankan1890) 
  */
 
 
@@ -77,6 +80,9 @@ namespace nana{
 
 			if (options.empty())
 				place_content.field_display(field_options, false);
+
+			if (caption.caption().empty())
+				place_content.field_display(field_title, false);
 		}
 	};
 

source/gui/widgets/skeletons/text_editor.cpp

@@ -2311,7 +2311,7 @@ namespace nana{	namespace widgets
 		{
 			auto text = _m_make_select_string();
 			if (!text.empty())
-				nana::system::dataexch().set(text);
+				nana::system::dataexch().set(text, API::root(this->window_));
 		}
 
 		void text_editor::cut()

source/gui/widgets/treebox.cpp

@@ -866,8 +866,7 @@ namespace nana
 				item_proxy& item_proxy::check(bool ck)
 				{
 					trigger_->check(node_, ck ? checkstate::checked : checkstate::unchecked);
-					if(trigger_->draw())
-						API::update_window(trigger_->impl()->data.widget_ptr->handle());
+					trigger_->draw();
 					return *this;
 				}
 
@@ -1664,7 +1663,8 @@ namespace nana
 					if (!impl_->attr.auto_draw)
 						return false;
 
-					impl_->draw(false);
+					if(impl_->draw(false))
+						API::update_window(impl_->data.widget_ptr->handle());
 					return true;
 				}
 
@@ -2198,6 +2198,13 @@ namespace nana
 			return get_drawer_trigger().checkable();
 		}
 
+		void treebox::clear()
+		{
+			auto impl = get_drawer_trigger().impl();
+			impl->attr.tree_cont.clear();
+			get_drawer_trigger().draw();
+		}
+
 		treebox::node_image_type& treebox::icon(const std::string& id) const
 		{
 			return get_drawer_trigger().icon(id);