+bool
+Scroomer::on_scroll_event (GdkEventScroll* ev)
+{
+ switch (ev->direction) {
+ case GDK_SCROLL_UP:
+ adj.set_value (adj.get_value() + adj.get_page_size() / 10.0);
+ break;
+ case GDK_SCROLL_DOWN:
+ adj.set_value (adj.get_value() - adj.get_page_size() / 10.0);
+ break;
+ default:
+ return false;
+ }
+
+ return true;
+}
+