From 5320ead6bd4338c5f15a98a445c7426ac9e2d2f2 Mon Sep 17 00:00:00 2001
From: Jinhao <cnjinhao@hotmail.com>
Date: Fri, 19 Apr 2019 04:40:49 +0800
Subject: [PATCH] add treebox.horvered method

---
 include/nana/gui/widgets/treebox.hpp |  2 ++
 source/gui/widgets/treebox.cpp       | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/include/nana/gui/widgets/treebox.hpp b/include/nana/gui/widgets/treebox.hpp
index ba40c4c1..9c865076 100644
--- a/include/nana/gui/widgets/treebox.hpp
+++ b/include/nana/gui/widgets/treebox.hpp
@@ -480,6 +480,8 @@ namespace nana
 		 */
 		void scroll_into_view(item_proxy item);
 
+		/// Gets the current hovered node.
+		item_proxy hovered(bool exclude_expander) const;
 	private:
 		std::shared_ptr<scroll_operation_interface> _m_scroll_operation() override;
 
diff --git a/source/gui/widgets/treebox.cpp b/source/gui/widgets/treebox.cpp
index eb859353..5b6e3c0d 100644
--- a/source/gui/widgets/treebox.cpp
+++ b/source/gui/widgets/treebox.cpp
@@ -2371,6 +2371,19 @@ namespace nana
 				API::refresh_window(*this);
 		}
 
+		treebox::item_proxy treebox::hovered(bool exclude_expander) const
+		{
+			internal_scope_guard lock;
+			auto dw = &get_drawer_trigger();
+			if (dw->impl()->node_state.pointed)
+			{
+				//Returns empty item_proxy if the mouse is on expander and exclude_expander is required.
+				if (exclude_expander && (dw->impl()->node_state.comp_pointed == drawerbase::treebox::component::expander))
+					return item_proxy{};
+			}
+			return item_proxy(const_cast<drawer_trigger_t*>(dw), dw->impl()->node_state.pointed);
+		}
+
 		std::shared_ptr<scroll_operation_interface> treebox::_m_scroll_operation()
 		{
 			internal_scope_guard lock;