Do I always have to provide Tkx's -command argument an anonymous subroutine?
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by Zaid
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Published on 2010-04-12T07:22:41Z
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2010/04/12
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I find it a bit weird that I have to wrap defined subroutines anonymously when specifying the -command argument for Tkx widgets.
An excerpt from a TkDocs tutorial demonstrates this:
my $cb = $frm->new_ttk__button ( -text => "Calculate",
-command => sub {calculate();} );
sub calculate {
$meters = int(0.3048*$feet*10000.0+.5)/10000.0 || '';
}
Why doesn't it work when I write -command => &calculate() or -command => \&calculate()?
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