Hi,

I am writing a multi-threaded GUI in perl TK. Beside the main thread, the object of new thread is to monitor a server event queue and when ever there is a new event add it to a scrolled widget. At the same time the main thread might also add data to the scrolled widget as the scrolled widget is used for logging/status window.
When ever I try to add any event to the scrolled object from the child thread, my application dies with the following err:
Attempt to free non-existent shared string '_TK_RESULT_', Perl interpreter: 0x267d22c at C:/Perl/site/lib/Tk/Widget.pm

I would like to know if i can pass the object of scrolled widget or as a matter any hash reference to another thread in perl 5.10? 

# Code to create scrolled widget
my @CreateOptions = 
['ROText', -label=>"Phone $Id", -labelPack => [-side => 'top', -expand
+ => 0, -anchor => 'w', -fill => 'y'], -wrap => 'none', -relief => 'gr
+oove', -width=>$Width, -fg=>'white',-background=>"black", -scrollbars
+ => 'se']; 

@PackOptions = [-row=>0, -column=>0, -sticky=>"news", -columnspan=>7, 
+-rowspan=>19]

$AFScroller->{LogScroller} = MW->Scrolled(@CreateOptions);# this is th
+e object to scrolled widget
$AFScroller->{LogScroller}->grid(@PackOptions);

# code where new thread is created and scrolled widget object is used 
+to add event

sub Activate {
   my $EventQueueTread = Thread->new(\&MonitorEventQueue, ($self, $Id)
+);
   $EventQueueTread->detach;
   $AFScroller->{'LogScroller'}->insert('end',"xxx yyyyy");
   $AFScroller->{'LogScroller'}->see('end');
   $AFScroller->{'LogScroller'}->update;
   # do other stuff
   return 1;
}
sub MonitorEventQueue {
   START:
   $newevent =  Checkeventqueue();
   if ($newevent){
   $AFScroller->{'LogScroller'}->insert('end',"$newevent");# this is w
+hen application dies
   $AFScroller->{'LogScroller'}->see('end');
   $AFScroller->{'LogScroller'}->update;
   }
   sleep 1;
   goto START;
}

[download]
Your help is very much appreciated
Thanks,
Jai!

In reply to How to pass scrolled object to another thread by himanshujain_60

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