void PopupMenu::_activate_submenu(int over) {
Node* n = get_node(items[over].submenu);
ERR_EXPLAIN("item subnode does not exist: "+items[over].submenu);
ERR_FAIL_COND(!n);
Popup *pm = n->cast_to<Popup>();
ERR_EXPLAIN("item subnode is not a Popup: "+items[over].submenu);
ERR_FAIL_COND(!pm);
if (pm->is_visible())
return; //already visible!
Point2 p = get_global_pos();
Rect2 pr(p,get_size());
Ref<StyleBox> style = get_stylebox("panel");
pm->set_pos(p+Point2(get_size().width,items[over]._ofs_cache-style->get_offset().y));
pm->popup();
PopupMenu *pum = pm->cast_to<PopupMenu>();
if (pum) {
pr.pos-=pum->get_global_pos();
pum->clear_autohide_areas();
pum->add_autohide_area(Rect2(pr.pos.x,pr.pos.y,pr.size.x,items[over]._ofs_cache));
if (over<items.size()-1) {
int from = items[over+1]._ofs_cache;
pum->add_autohide_area(Rect2(pr.pos.x,pr.pos.y+from,pr.size.x,pr.size.y-from));
}
}
}
