Monks,

I have the following code 

sub guiStart
{
    my ($client,$login) = @_;
    
    my $mw = MainWindow->new(-borderwidth=>30,
                             -title=>"Duplicates: ".$$client);

    my %layout = ('frame'   => [],
                  'label'   => [],
                  'callback'=> []);
    
    #Construct labels 
    $layout{'label'}->[0] = 'List Available Data';
    $layout{'label'}->[1] = 'Remove Data';
    $layout{'label'}->[2] = 'Add Data';
    $layout{'label'}->[3] = 'Identify Duplicates';
    $layout{'label'}->[4] = 'Change Client';
    $layout{'label'}->[5] = 'Exit Application';
    
    #Set callbacks
    $layout{'callback'}->[0] = [\&listData,$client,$login,$mw];
    $layout{'callback'}->[1] = [\&removeData,$client,$login,$mw];
    $layout{'callback'}->[2] = [\&addData,,$client,$login,$mw];
    $layout{'callback'}->[3] = \&identifyDuplicates;
    $layout{'callback'}->[4] = \&changeClient;
    $layout{'callback'}->[5] = \&exitApp;            
    
    for (0..5)
    {
        #Create the frames
        $layout{'frame'}->[$_]  = $mw->Frame();
    
        #Create the buttons
        $layout{'frame'}->[$_]->Button(-text   =>$layout{'label'}->[$_
+],
                                        -width  =>20,
                                       -command=>$layout{'callback'}->
+[$_])->pack();
        $layout{'frame'}->[$_]->pack();
    }
    
    MainLoop;
    
    return;
}

[download]
I had asked for opinions on the gui setup in a previous SoPW node, but now I come with a different question. The call back that references \&removeData has a possible memory leak. Here is the code for removeData 
sub removeData
{
    my ($client,$login,$mw) = @_;
    
    my @tapes = getTapes($client,$login);
    
    #Create a DialogBox
    my $dlg = $mw->DialogBox(-title      =>"Delete tape for: ".$$clien
+t,
                             -buttons    =>['Delete','Cancel'],
                             -borderwidth=>5);
    
    my $list =    $dlg->Scrolled('Listbox',
                                 -scrollbars=>'oe os',
                                 -background=>'black',
                                 -foreground=>'white',
                                 -height    =>12,
                                 -width     =>12)->pack();
                                     
    $list->insert('end',$_) for @tapes;                               
+  
                                        
    my $choice= $dlg->Show();
        
    my $num = $list->get($list->curselection());
    
    #If the user chose Delete
    if(lc($choice) eq 'delete')
    {
        #Drop the listbox
        $list->packForget();
    
        #Reconfigure the dialog    title
        $dlg->configure(-title  =>'Delete Confirmation!');
        
        #Reconfigure the dialog button text
        $dlg->Subwidget('B_Delete')->configure(-text=>'Yes');
        $dlg->Subwidget('B_Cancel')->configure(-text=>'No');
    

        $dlg->Label(-text=>"Tape:".$num." will be deleted.  Are you su
+re?")->pack();
        
        if(lc($dlg->Show()) eq 'yes')
        {
            my $success = deleteTape($client,\$num,$login);
            
        }
    }                                        

    return;
}

[download]
If I open this dialog box from the callback, the memory usage goes up. If I close it and re-open it .. it continues to go up. I fail to see why this would happen. Am I missing something obvious? Are there good tools that can help me identify this on my own?

Thanks,
Grygonos

In reply to Need Help Identifying Possible Tk Memory Reuse Problem by Grygonos

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