Just in case somebody with the same problem finds this thread, here is the method function I added to Popupmenu.pm to solve the problem: 
sub set()
{
    my $this = shift;
    my $id = shift;
    $this->{-values}->[$this->{-selected}] = $id;
}

[download]

In reply to Re^3: How can I call a class method of the object's parent class? by dissident
in thread How can I call a class method of the object's parent class? by dissident

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