Merge branch 'hotfix-1.7.2' into develop

source/gui/filebox.cpp

@@ -1522,7 +1522,7 @@ namespace nana
 			if (!*str)
 			{
 				targets.emplace_back(parent_path);
-				impl_->path = parent_path.parent_path().u8string();
+				impl_->path = parent_path.parent_path().string();
 			}
 			else
 			{
@@ -1532,7 +1532,7 @@ namespace nana
 					targets.emplace_back(parent_path / path_type{str});
 					str += (len + 1);
 				}
-				impl_->path = parent_path.u8string();
+				impl_->path = parent_path.string();
 			}
 		}
 		else
@@ -1540,7 +1540,7 @@ namespace nana
 			wfile.resize(std::wcslen(wfile.data()));
 
 			targets.emplace_back(wfile);
-			impl_->path = targets.front().parent_path().u8string();
+			impl_->path = targets.front().parent_path().string();
 		}
 
 #elif defined(NANA_POSIX)

source/gui/msgbox.cpp

@@ -1267,7 +1267,7 @@ namespace nana
 			auto files = impl->fbox.show();
 			if(!files.empty())
 			{
-				impl->value = files.front().u8string();
+				impl->value = files.front().string();
 				impl->path_edit.caption(impl->value);
 			}
 		});

source/gui/widgets/listbox.cpp

@@ -2401,7 +2401,9 @@ namespace nana
 								nana::rectangle r;
 								if (rect_lister(r))
 								{
-									auto top = new_where.second * item_h + header_visible_px();
+									//potential displacement due to partially visible first visible item
+									auto disp = origin.y - first_display().item * item_h;
+									auto top = new_where.second * item_h + header_visible_px() - disp;
 									if (checkarea(item_xpos(r), static_cast<int>(top)).is_hit(pos))
 										new_where.first = parts::checker;
 								}
@@ -6000,6 +6002,7 @@ namespace nana
 		{
 			internal_scope_guard lock;
 			_m_ess().lister.sort_column(col, &reverse);
+			_m_ess().update();
 		}
 
 		auto listbox::sort_col() const -> size_type

source/gui/widgets/tabbar.cpp

@@ -1229,7 +1229,8 @@ namespace nana
 
 				void trigger::erase(std::size_t pos)
 				{
-					layouter_->erase(pos);
+					if (layouter_->erase(pos))
+						API::refresh_window(layouter_->widget_handle());
 				}
 
 				void trigger::tab_color(std::size_t i, bool is_bgcolor, const ::nana::color& clr)

source/gui/widgets/treebox.cpp

@@ -1274,7 +1274,10 @@ namespace nana
 
 				item_proxy	item_proxy::operator++(int)
 				{
-					return sibling();
+					item_proxy ip(*this);
+					if(trigger_ && node_)
+						node_ = node_->next;
+					return ip;
 				}
 
 				item_proxy& item_proxy::operator*()
@@ -1952,7 +1955,7 @@ namespace nana
 					impl_->attr.tree_cont.for_each<item_locator&>(shape.first, nl);
 
 					auto const node = nl.node();
-					if (!node)
+					if (!node || !node->child)
 						return;
 
 					switch (nl.what())