You may find this example handy and informative: 
#!/usr/bin/perl
use Tk;
my $mw = new MainWindow;

my $currentSize = $mw->reqwidth . "x" . $mw->reqheight;
$mw->bind( '<Configure>', [ \&OnResize, \$currentSize ] );

MainLoop;

sub OnResize {
    my ( $mw, $oldSize ) = @_;

    my $newSize = $mw->width . "x" . $mw->height;
    if ( $$oldSize ne $newSize ) {
## Resize has occurred do something: 
        printf( "Resize happened - old size: %s, new size: %s\n",
            $$oldSize, $newSize );
## set the old size to the new size 
        $$oldSize = $newSize;
    }
}

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In reply to Re: Tk Window Size by zentara
in thread Tk Window Size by Gwalchmai

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