Optionmenu(3pm) User Contributed Perl Documentation Optionmenu(3pm)NAMETk::Optionmenu - Let the user select one of some predefined options
values
SYNOPSIS
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, [...], ...
DESCRIPTION
The Optionmenu widget allows the user chose between a given set of
options.
If the user should be able to change the available option have a look
at Tk::BrowseEntry.
OPTIONS-options
(Re)sets the list of options presented.
-command
Defines the callback that is invokes when a new option is selected.
-variable
Reference to a scalar that contains the current value of the
selected option.
-textvariable
Reference to a scalar that contains the text label of the current
value of the selected option.
METHODS
addOptions
Adds OPTION_LIST to the already available options.
EXAMPLE
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, "\n" },
-variable => \$var,
-textvariable => \$tvar
)->pack;
$opt->addOptions([may=>5],[jun=>6],[jul=>7],[aug=>8]);
my $f = $mw->Frame(-relief=>'groove', -borderwidth => 2)->pack;
$f->Label(-textvariable=>\$tvar)->pack(-side => 'left');
$f->Label(-text => " -> ")->pack(-side => 'left');
$f->Label(-textvariable=>\$var)->pack(-side => 'left');
$mw->Button(-text=>'Exit', -command=>sub{$mw->destroy})->pack;
MainLoop;
SEE ALSO
Tk::Menubutton, Tk::BrowseEntry
perl v5.26.0 2017-07-22 Optionmenu(3pm)
