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GUI enabling/disabling of controls: Difference between revisions
GUI enabling/disabling of controls (view source)
Revision as of 20:13, 30 November 2020
, 3 years ago→{{header|Phix}}
Line 2,006:
discard mainloop()
iup.close()</lang>
=={{header|Perl}}==
<lang perl>#!/usr/bin/perl
use strict;
use warnings;
use Tk;
use Tk::Dialog;
use Tk::LabFrame;
my $value = 0;
my $mw = MainWindow->new;
$mw->title( 'GUI component enable/disable' );
my $lf = $mw->LabFrame( -label => 'Value' )->pack(-fill => 'x',-expand => 1);
my $entry = $lf->Entry( -width => 10, -textvariable => \$value,
-validate => 'key', -validatecommand => sub {
$_[0] =~ /^\d{1,9}\z/ ? do{setenable($_[0]); 1} : 0
},
)->pack(-fill => 'x', -expand => 1);
my $inc = $mw->Button( -text => 'increment',
-command => sub { $value++; setenable($value) },
)->pack( -side => 'left' );
my $dec = $mw->Button( -text => 'decrement',
-command => sub { $value--; setenable($value) },
)->pack( -side => 'right' );
setenable($value);
MainLoop;
sub setenable
{
$inc and $inc->configure( -state => $_[0] < 10 ? 'normal' : 'disabled' );
$dec and $dec->configure( -state => $_[0] > 0 ? 'normal' : 'disabled' );
$entry and $entry->configure( -state => $_[0] == 0 ? 'normal' : 'disabled' );
}</lang>
=={{header|Phix}}==
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