Hi Perl Monks, I'm trying to create a GUI which consists of several BrowseEntries and stores the Index and the Value of every Selection for further use. I'm doing this via the -browsecmd Option. But since there will be a lot of BrowseEntries and I don't want to write as many Subroutines I want to store the BrowseEntries in a Hash and just pass their key to a single Subroutine like in the code below:

#!usr/bin/perl

use strict;
use warnings;

use Tk;
use Tk::BrowseEntry;

my $mw = MainWindow->new();

my %entries;
my %entries_list;

#Definition of Browseentry 1 ###############
$entries{option1} = $mw->BrowseEntry(
                -browsecmd=>\&selection("option1")
                )->pack();
$entries_list{option1} = $entries{option1}->Subwidget("slistbox");
for (qw/Word1 Word2 Word3 Word4/) 
    {
    $entries{option1}->insert("end", $_);
    }

#Definition of Browseentry 2 ###############
$entries{option2} = $mw->BrowseEntry(
                -browsecmd=>\&selection("option2")
                )->pack();
$entries_list{option2} = $entries{option2}->Subwidget("slistbox");
for (qw/Word5 Word6 Word7 Word8/) 
    {
    $entries{option2}->insert("end", $_);
    }

###########################################
$mw->MainLoop();

exit 0;

###########################################
sub selection {
    print "Index: ".$entries_list{$_[0]}->curselection
    ." Value: ".$entries_list{$_[0]}->get(
                  $entries_list{$_[0]}->curselection()
                         )."\n"; 
       #<-this is where the errormessage points
        } #selection

[download]

The Problem is, that -browsecmd calls the selection Subroutine upon loading the GUI when i pass a Parameter and i get:
"Can't call method "curselection" on an undefined value at code_snippet.pl line 29."
Makes sense since there is no Subwidget defined when selection is called. It does work though if i don't pass a Parameter, but then i can't use a single Subroutine for every BrowseEntry.

I tried adding  return if ! defined $entries_list{$_[0]}; to the Subroutine but that leads to the following errormessage
Tk::Error: Odd number of args to Tk::BrowseEntry->new(...)
Tk callback for .
Tk::Widget::new at /usr/lib64/perl5/vendor_perl/Tk/Widget.pm line 164
Tk::Widget::__ANON__ at /usr/lib64/perl5/vendor_perl/Tk/Widget.pm line 256
Odd number of args to Tk::BrowseEntry->new(...)
at code_snippet.pl line 15

Any advice is highly welcomed. ;)

In reply to Tk::Browseentry -browsecmd Option with Subroutine Parameter by erpse

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