+void List::on_style_change()
+{
+ items_part = (style ? style->get_part("items") : nullptr);
+}
+
+void List::move_focus(Navigation nav, bool select)
+{
+ if(nav==NAV_UP && view_mode==GRID)
+ {
+ unsigned row = item_index_to_row(focus_index);
+ if(row>0)
+ set_focus_index(rows[row-1].first+focus_index-rows[row].first);
+ else
+ set_focus_index(0);
+ }
+ else if(nav==NAV_DOWN && view_mode==GRID)
+ {
+ unsigned row = item_index_to_row(focus_index);
+ if(row+1<rows.size())
+ set_focus_index(rows[row+1].first+focus_index-rows[row].first);
+ else
+ set_focus_index(items.size()-1);
+ }
+ else if(nav==NAV_UP || (nav==NAV_LEFT && view_mode==GRID))
+ {
+ if(focus_index>0)
+ set_focus_index(focus_index-1);
+ }
+ else if(nav==NAV_DOWN || (nav==NAV_RIGHT && view_mode==GRID))
+ {
+ if(static_cast<unsigned>(focus_index+1)<items.size())
+ set_focus_index(focus_index+1);
+ }
+
+ if(select)
+ set_selected_index(focus_index);
+}
+
+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]);
+ }
+}
+