Tk behaviour

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

Hi, I just finishe developing a user app using Tk and now I have to fix one strange behaviour (by strange I mean: that which I do not understand). I have a loop that executes on a button callback and it executes a function and depending on the data returned by the function I have to show some things on the app window. Thing is: when the loop is being executed, and I change the text of a Label object, it does not "change" instantly. It is as if the loop blocks the app (if I put other windows on top of it, it is not redrawn). Here is a piece of the code, edited to fit here:

$err = $SiTef->ExecutaLoopAutorizacao( $SiTef, $params, $data );
  while ( $err eq '10000' ) {
    #print Dumper( $params, $data );
    #print "\nRETORNO: $err\n";
    
    if ( $params->{UserMessage} ) { $Status = $params->{Message}; }
    
    $err = $SiTef->ExecutaLoopAutorizacao( $SiTef, $params, $data );
  }
[download]

the GUI has this label:

my $Status;
my $lblStatus = $mw->Label(-textvariable=>\$Status)->pack();
[download]

Is there something Im not getting about Tk programming, is there an easy way to fix this or should I go somewhere else?

------------------------------- Keep on PERLing the free world. ------donato-------------------

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Replies are listed 'Best First'.
Re: Tk behaviour by jdtoronto (Prior) on Feb 14, 2007 at 16:48 UTC
To get the GUI to change you usually need to run the update method on the MainWindow, `$mw->update();` [download] jdtoronto	[reply] [d/l]
Re^2: Tk behaviour by donato (Novice) on Feb 14, 2007 at 17:01 UTC
Thank you!! `jdtoronto++ while (1);` [download] ------------------------------- Keep on PERLing the free world. ------donato-------------------	[reply] [d/l]