+ adjust_index(list.sel_index, i, 1);
+ adjust_index(list.focus_index, i, 1);
+
+ Item *item = list.create_item(i);
+ list.items.insert(list.items.begin()+i, item);
+ list.items_changed();
+}
+
+void List::DataObserver::item_removed(unsigned i)
+{
+ bool had_selection = (list.sel_index>=0);
+ adjust_index(list.sel_index, i, -1);
+ adjust_index(list.focus_index, i, -1);
+
+ delete list.items[i];
+ list.items.erase(list.items.begin()+i);
+ list.items_changed();
+
+ if(had_selection && list.sel_index<0)
+ list.signal_selection_cleared.emit();
+}
+
+void List::DataObserver::cleared()
+{
+ list.sel_index = -1;
+ list.focus_index = -1;
+ for(Item *i: list.items)
+ delete i;
+ list.items.clear();
+ list.items_changed();
+
+ list.signal_selection_cleared.emit();
+}
+
+void List::DataObserver::refresh_item(unsigned i)
+{
+ delete list.items[i];
+ // Avoid stale pointer while create_item is executing
+ list.items[i] = nullptr;
+ list.items[i] = list.create_item(i);
+ list.items_changed();
+}
+
+
+List::Item::Item()
+{
+ input_type = INPUT_NAVIGATION;
+}
+
+void List::Item::autosize_special(const Part &part, Geometry &ageom) const
+{
+ if(part.get_name()=="children")
+ {
+ const Sides &margin = part.get_margin();
+ for(const Child *c: children)