use Tk;
use strict;
my $main = new MainWindow;
# See if button was pressed
my $waspressed = 0;
# Instructions button.
my $lab = $main->Label(-text => "Choose the color\nof the exit button",
-background => "Yellow");
# The all important exit button.
my $alldone = $main->Button
(-text => "Exit", -background => "#888888",
-command => sub {
if ($waspressed) {
exit 0;
} else {
$lab->configure(-text => "SET THE BUTTON COLOR\nFIRST!!",
-foreground => 'Red');
}
} );
# Three color bottons together.
my $buts = $main->Frame;
my $red = $buts->Button(-text => "Red", -background => "#ffaaaa",
-command => sub {
$alldone->configure( -background => "Red");
$waspressed = 1; } );
my $green = $buts->Button(-text => "Green", -background => "#aaffaa",
-command => sub {
$alldone->configure( -background => "Green");
$waspressed = 1; } );
my $blue = $buts->Button(-text => "Blue", -background => "#aaaaff",
-command => sub {
$alldone->configure( -background => "Blue");
$waspressed = 1; } );
# Set top level window yellow.
$main->configure( -background => "Yellow");
# Pack it all together. In Perl, you can only pack one at a time.
$red->pack(-side => "left");
$green->pack(-side => "left");
$blue->pack(-side => "left");
$lab->pack(-side => "top");
$buts->pack(-side => "top");
$alldone->pack(-side => "top");
MainLoop;