Evenin' folks, I hope you all can help me out.

Here is my code to replicate my issue. You will see two sets of button grids. As you click the Switch button at the top, it toggles which grid is enabled or disabled. But, after re-enabling a grid, the button color remains "white", yet a mouse-over will restore the correct color. I found a code clip using the 'repeat' method to call a function to reconfigure the buttons back to their appropriate color, but it does not work. It does work when I use...

( -text => 'blue' )

...all of the buttons show "blue" labels, but no color change when I use..

( -foreground => 'blue' )

... so the repeat method does work, but not how I would like it to for button foreground color.

I did find posts with examples of 'repeat' and 'after', but nothing that suited my situation. Plus, since the repeat method does work on the text label test, there must be something else I am missing. It's mostly been just myself and the Mastering Perl/Tk book for a couple of months, now. :)

Thanks!

Derrick

#!/usr/bin/perl

use strict;
use warnings;
use feature qw( state );
use Tk;

my ( @bHits, @rHits );
my ( @bList, @rList );
state $turn = 0;

my $mw = MainWindow->new( -title => 'Test Grid!' );
$mw->geometry( '1000x400+200+50' );
$mw->resizable( 0, 0 );
$mw->Label( -text       => 'Test Grid',
            -foreground => 'black',
          )->pack( -side   => 'top',
                   -expand => '0', );

my $mw_switch_b = $mw->Button(
            -text    => 'Switch',
            -command => sub { $turn ? disableBtns( \@bList, \@rList )
                                    : disableBtns( \@rList, \@bList );
+ }
                             )->pack;

my $mw_exit_b = $mw->Button( -text    => 'Exit',
                             -command => sub { exit }
                           )->pack;
my ( $blueFrame, $redFrame, $blHitFrame, $rdHitFrame );

$blueFrame = $mw->Frame;
$redFrame  = $mw->Frame;
### Blue Grid
for my $row ( 0 .. 9 ) {
    for my $col ( 0 .. 9 ) {;
        $blueFrame->Button( -text       => $col . $row,
                            -background => 'light blue',
                            -command    => [ \&showBtn ],
                          )->grid( -row => $row, -column => $col );
    }
}
### Red Grid
for my $row ( 0 .. 9 ) {
    for my $col ( 0 .. 9 ) {
        $redFrame->Button( -text       => $col . $row,
                           -background => 'indian red',
                           -command    => [ \&showBtn ],
                         )->grid( -row => $row, -column => $col );
    }
}

$blueFrame->pack( -side => 'left',  -padx => '10' );
$redFrame->pack( -side  => 'right', -padx => '10' );

@bList = $blueFrame->gridSlaves();
@rList = $redFrame->gridSlaves();

$blueFrame->repeat( 1000, \&update_button_colors);
$redFrame->repeat(  1000, \&update_button_colors);

MainLoop;

sub update_button_colors {
    foreach my $b ( @bList ) {
        $b->configure( -background => 'light blue' );
    }
    foreach my $r ( @rList ) {
        $r->configure( -background => 'indian red' );
    }
    return;
}
sub showBtn {
    ( $turn ) ? disableBtns( \@rList, \@bList )
              : disableBtns( \@bList, \@rList );
    return;
}
sub disableBtns {
    my @list = ( @_ ); # gridSlave references bList and rList
    for ( 0 .. 1 ) {
        foreach my $btn ( @{$list[$_]} ) {
            $_ ? $btn->configure( -state => 'disable' )
               : $btn->configure( -state => 'active' );
        }
    }
    $turn = !( $turn );
    return;
}

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In reply to Perl/Tk button color refresh using repeat... by dbuckhal

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