perl/Tk error

perlplayer has asked for the wisdom of the Perl Monks concerning the following question:

i am trying to write a perl/tk code to popup a window press a buuton in the main window so that a new popupchild will come My Code

use Tk;
use strict;

my $mw = MainWindow->new;
$mw->geometry("500x200");
$mw->title("All-In-One Test");

my $but=$mw->Button(-text=>"press",-command=>"\&newwindow")->pack();

sub newwindow(){

my $popup=$mw->Toplevel()->pack();
}
MainLoop;
[download]

but i getting the following error while pressing the button even though i have Tk-804.028_501 installed along with my perl
Tk::Error: Undefined subroutine &main::&newwindow called at /tools/openbin/perl/5.10.0/sparc-sun-solaris8/lib/site_perl/5.10.0/sun4-solaris-thread-multi/Tk.pm line 250. Tk callback for .button Tk::__ANON__ at /tools/openbin/perl/5.10.0/sparc-sun-solaris8/lib/site_perl/5.10.0/sun4-solaris-thread-multi/Tk.pm line 250 Tk::Button::butUp at /tools/openbin/perl/5.10.0/sparc-sun-solaris8/lib/site_perl/5.10.0/sun4-solaris-thread-multi/Tk/Button.pm line 175 <ButtonRelease-1> (command bound to event)

Comment on perl/Tk error Download Code

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Re: perl/Tk error by zentara (Cardinal) on Dec 03, 2008 at 13:29 UTC
That's easy, remove the double quotes around "\&newwindow". Also you can't pack a toplevel window. I'm not really a human, but I play one on earth Remember How Lucky You Are	[reply]
Re^2: perl/Tk error by perlplayer (Sexton) on Dec 04, 2008 at 04:18 UTC
thanks	[reply]
Re: perl/Tk error by hominid (Priest) on Dec 03, 2008 at 13:32 UTC
Try getting rid of the quotes around the callback, like this `my $but=$mw->Button(-text=>"press",-command=>\&newwindow)->pack();` [download]	[reply] [d/l]