void set_member_active(const T& value, const bool active)
    {
        if(members_.find(value) == members_.end()) {
            return;
        }

        tselectable_& w = *members_[value];
        dynamic_cast<tcontrol&>(w).set_active(active);

        // This member was selected, select another
        if(!active && w.get_value_bool()) {
            w.set_value_bool(false);

            // Look for the first active member to select
            for(auto& member : members_) {
                if(dynamic_cast<tcontrol&>(*member.second).get_active()) {
                    member.second->set_value_bool(true);
                    break;
                }
            }
        }
    }