+void List::focus_in()
+{
+ if(focus_index>=0 && items[focus_index]->is_visible())
+ set_input_focus(items[focus_index]);
+ else
+ {
+ if(sel_index>=0 && items[sel_index]->is_visible())
+ set_focus_index(sel_index);
+ else if(!items.empty())
+ set_focus_index(first);
+ }
+}
+
+bool List::navigate(Navigation nav)
+{
+ if(nav==NAV_UP && !items.empty())
+ {
+ if(focus_index>0)
+ set_focus_index(focus_index-1);
+ }
+ else if(nav==NAV_DOWN && !items.empty())
+ {
+ if(static_cast<unsigned>(focus_index+1)<items.size())
+ set_focus_index(focus_index+1);
+ }
+ else if(nav==NAV_ACTIVATE)
+ set_selected_index(focus_index);
+ else
+ return false;
+
+ return true;
+}
+
+void List::set_focus_index(int i)
+{
+ focus_index = i;
+ if(focus_index>=0)
+ {
+ scroll_to_focus();
+ if(state&FOCUS)
+ set_input_focus(items[focus_index]);
+ }
+}
+