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.\" ========================================================================
.\"
.IX Title "Optionmenu 3pm"
.TH Optionmenu 3pm "2010-05-29" "perl v5.14.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
Tk::Optionmenu \- Let the user select one of some predefined options values
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use Tk::Optionmenu;
\&
\&    $opt = $w\->Optionmenu(
\&                        \-options => REFERENCE_to_OPTIONLIST,
\&                        \-command => CALLBACK,
\&                        \-variable => SCALAR_REF,
\&                        );
\&
\&    $opt\->addOptions( OPTIONLIST );
\&
\&    # OPTION LIST is
\&    #   a)  $val1, $val2, $val3,...
\&    #   b)  [ $lab1=>$val1], [$lab2=>val2], ... ]
\&    #   c)  combination of a) and b), e.g.,
\&    #       val1, [$lab2=>val2], val3, val4, [...], ...
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBOptionmenu\fR widget allows the user chose between a given set
of options.
.PP
If the user should be able to change the available option have a look
at Tk::BrowseEntry.
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\-options" 4
.IX Item "-options"
(Re)sets the list of options presented.
.IP "\-command" 4
.IX Item "-command"
Defines the callback that is invokes when a new option
is selected.
.IP "\-variable" 4
.IX Item "-variable"
Reference to a scalar that contains the current value of the
selected option.
.IP "\-textvariable" 4
.IX Item "-textvariable"
Reference to a scalar that contains the text label of the current value of the
selected option.
.SH "METHODS"
.IX Header "METHODS"
.IP "addOptions" 4
.IX Item "addOptions"
Adds \s-1OPTION_LIST\s0 to the already available options.
.SH "EXAMPLE"
.IX Header "EXAMPLE"
.Vb 2
\& use Tk;
\& my $mw = MainWindow\->new();
\&
\& my ($var, $tvar);
\& my $opt = $mw\->Optionmenu(
\&        \-options => [[jan=>1], [feb=>2], [mar=>3], [apr=>4]],
\&        \-command => sub { print "got: ", shift, "\en" },
\&        \-variable => \e$var,
\&        \-textvariable => \e$tvar
\&       )\->pack;
\&
\& $opt\->addOptions([may=>5],[jun=>6],[jul=>7],[aug=>8]);
\&
\& my $f = $mw\->Frame(\-relief=>\*(Aqgroove\*(Aq, \-borderwidth => 2)\->pack;
\& $f\->Label(\-textvariable=>\e$tvar)\->pack(\-side => \*(Aqleft\*(Aq);
\& $f\->Label(\-text => " \-> ")\->pack(\-side => \*(Aqleft\*(Aq);
\& $f\->Label(\-textvariable=>\e$var)\->pack(\-side => \*(Aqleft\*(Aq);
\&
\& $mw\->Button(\-text=>\*(AqExit\*(Aq, \-command=>sub{$mw\->destroy})\->pack;
\&
\& MainLoop;
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Tk::Menubutton, Tk::BrowseEntry