IIRC Tk uses tied scalars for textvariables, so you need to update each scalar value in the hash separately. See the code below. 

use Tk;

my %current = (pilot => 'Harry');

my $mw = MainWindow->new;
    $mw->geometry('200x200');

my $ent = $mw->Entry(
    -textvariable => \$current{pilot}, 
    )->pack;
    
my $btn = $mw->Button(
    -text => 'New Pilot',
    -command => \&update,
    )->pack;

MainLoop;

sub update{

    # This works
    $current{pilot} =  'Tom';

    # This does not work
    %current = (pilot => 'Tom');

    # So update the entire hash this way
    my %newstuff = (pilot => 'Tom', copilot =>'Dick', etc => 'Harry');
    for (keys %newstuff){
        $current{$_} = $newstuff{$_};
    }
}

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In reply to Re: tk form textvariables by hangon
in thread tk form textvariables by liamlrb

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