+}
+
+
+List::DataObserver::DataObserver(List &l):
+ list(l)
+{
+ list.data->signal_item_added.connect(sigc::mem_fun(this, &DataObserver::item_added));
+ list.data->signal_item_removed.connect(sigc::mem_fun(this, &DataObserver::item_removed));
+ list.data->signal_cleared.connect(sigc::mem_fun(this, &DataObserver::cleared));
+ list.data->signal_refresh_item.connect(sigc::mem_fun(this, &DataObserver::refresh_item));
+}
+
+void List::DataObserver::item_added(unsigned i)
+{
+ if(list.sel_index>=static_cast<int>(i))
+ ++list.sel_index;
+
+ Item *item = list.create_item(i);
+ list.items.insert(list.items.begin()+i, item);
+ list.items_changed();
+}
+
+void List::DataObserver::item_removed(unsigned i)
+{
+ if(list.sel_index>static_cast<int>(i))
+ --list.sel_index;
+ else if(list.sel_index==static_cast<int>(i))
+ list.sel_index = -1;
+
+ delete list.items[i];
+ list.items.erase(list.items.begin()+i);
+ list.items_changed();
+}
+
+void List::DataObserver::cleared()
+{
+ list.sel_index = -1;
+ for(vector<Item *>::iterator i=list.items.begin(); i!=list.items.end(); ++i)
+ delete *i;
+ list.items.clear();
+ list.items_changed();
+}
+
+void List::DataObserver::refresh_item(unsigned i)
+{
+ delete list.items[i];
+ list.items[i] = list.create_item(i);
+ list.items_changed();
+}