Iter move_to_next_selected( Iter it, Iter e_it, Iter end)
{
while( it < e_it && it != end)
{
if( it->selected())
return it;
++it;
}
return end;
}
Iter move_to_prev_selected( Iter it, Iter s_it, Iter start)
{
while( it > s_it && it != start)
{
if( it->selected())
return it;
--it;
}
return start;
}
