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Re: Updating one option menu by the value of another

by converter (Priest)
on Apr 29, 2003 at 11:13 UTC ( #253937=note: print w/replies, xml ) Need Help??

in reply to Updating one option menu by the value of another

You need to assign the widget references returned by the constructors to variables so that your first Optionmenu can invoke the second Optionmenu's configure() method to configure the -options attribute.

Give this code a try and see if it works for you. You'll have to replace the list of directories assigned to @myArr with directory names that exist on your system.

#!/usr/bin/perl use warnings; use strict; use Tk; use Tk::widgets qw( Label Optionmenu ); my $mw = tkinit; my $selectedDir; my @files; my $path = '.'; my @myArr = qw(foo bar); my $myFile; my ($Label1, $OptMenu1, $Label2, $OptMenu2); $Label2 = $mw->Label(-text => "level2 "); # no -options: we'll let $OptMenu1 configure -options $OptMenu2 = $mw->Optionmenu( -textvariable => \$myFile, ); $Label1 = $mw->Label(-text => "level1 "); $OptMenu1 = $mw->Optionmenu( -textvariable => \$selectedDir, # -command is invoked when the widget is # allocated and when a selection is made: -command => sub { # redirect the output of ls(1) to /dev/null unless # you want stderr output on the console @files = `ls $path/$selectedDir 2>/dev/null`; #foreach (@files) { chomp() } chomp @files; # chomp() take a LIST warn 'configure $OptMenu2'; # who needs a debugger? $OptMenu2->configure(-options => \@files); }, -options => \@myArr, ); $Label1->grid($OptMenu1, $Label2, $OptMenu2); MainLoop;

Minor speeling correction.

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[Corion]: I just found out that in $current_top_prior ity_project , the part I am in is not even in the top three worries. That's somewhat bad, not because I'm happy with being a top worry but because that means that I don't even know how bad the rest ...
[Corion]: ... of the situation is :-)
[marto]: it's good to know that things can always get worse :P
[hippo]: Ignorance can be bliss
[Corion]: hippo: Yeah - I'll just avoid the project lead :)
[Corion]: marto: Yeah, it helps with the perspective :-D

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