I've got some Tk Entry objects like:
   my($frame_Limit) = $root->Frame (
      -relief  => 'raised',
      -borderwidth => '3',
   );
   my($label_Limit) = $root->Label (
      -font => '-*-MS Sans Serif-Bold-R-Normal-*-*-120-*-*-*-*-*-*',
      -relief => 'flat',
      -text => 'Operand Limit',
   );
   my($entry_Limit) = $root->Entry (
      -justify => 'left',
      -textvariable => \$Limit,
      -validate => 'focusout',
      -validatecommand => \&Validate_Number,
   );

[download]
There are several entries like the code above,
My Validation routines are: 
#
# is_a_positive_integer
#
# Validate Numbers
#
# Arguments: $Number
#
# Returns: $Number or undef on Failure
#
sub is_a_positive_integer ($)
{
   my $Number = shift;

   if(!Data::Validate::is_integer($Number))
      {
      return undef;
      }
   elsif(!Data::Validate::is_greater_than($Number, 0))
      {
      return undef;
      }
   else
      {
      return $Number;
      }
}

#
# Validate_Number
#
# Tk validateCommand Callback
#
# Arguments: $NewValue, $CharChange, $CurrentValue, $Index, $ActionTyp
+e
#
# Returns: 0 on Failure to Validate 1 Otherwise
#
sub Validate_Number ($$$$$)
{
   my $NewValue     = shift;
   my $CharChange   = shift;
   my $CurrentValue = shift;
   my $Index        = shift;
   my $ActionType   = shift;

   if(defined(is_a_positive_integer($NewValue)))
      {
      return(1);
      }
   else
      {
      return(0);
      }
}

[download]
is_a_positive_integer was written for an earlier console version. Validate_Number is a wrapper for it for use by the Tk -validateCommand callback. This all runs fine under "use strict & use warnings.

The problem is that I need to know which entry is making the call so I can take appropriate action. Tk doesn't provide any calling routine information just values.

Any thoughts?

In reply to Tk validateCommand Help by NateTut

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