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# Copyright (c) 1995-2004 Nick Ing-Simmons. All rights reserved.
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
package Tk::After;
use Carp;
use vars qw($VERSION);
$VERSION = '4.007'; # $Id: //depot/Tkutf8/Tk/After.pm#11 $
sub _cancelAll
{
my $w = shift;
my $h = delete $w->{_After_};
foreach my $obj (values %$h)
{
# carp "Auto cancel ".$obj->[1]." for ".$obj->[0]->PathName;
$obj->cancel;
bless $obj,"Tk::After::Cancelled";
}
}
sub Tk::After::Cancelled::once { }
sub Tk::After::Cancelled::repeat { }
sub submit
{
my $obj = shift;
my $w = $obj->[0];
my $id = $obj->[1];
my $t = $obj->[2];
my $method = $obj->[3];
delete($w->{_After_}{$id}) if (defined $id);
$id = $w->Tk::after($t,[$method => $obj]);
unless (exists $w->{_After_})
{
$w->{_After_} = {};
$w->OnDestroy([\&_cancelAll, $w]);
}
$w->{_After_}{$id} = $obj;
$obj->[1] = $id;
return $obj;
}
sub DESTROY
{
my $obj = shift;
$obj->cancel;
undef $obj->[0];
undef $obj->[4];
}
sub new
{
my ($class,$w,$t,$method,@cb) = @_;
my $cb = (@cb == 1) ? shift(@cb) : [@cb];
my $obj = bless [$w,undef,$t,$method,Tk::Callback->new($cb)],$class;
return $obj->submit;
}
sub cancel
{
my $obj = shift;
my $id = $obj->[1];
my $w = $obj->[0];
if ($id)
{
$w->Tk::after('cancel'=> $id) if Tk::Exists($w);
delete $w->{_After_}{$id} if exists $w->{_After_};
$obj->[1] = undef;
}
return $obj;
}
sub repeat
{
my $obj = shift;
$obj->submit;
local $Tk::widget = $obj->[0];
$obj->[4]->Call;
}
sub once
{
my $obj = shift;
my $w = $obj->[0];
my $id = $obj->[1];
delete $w->{_After_}{$id};
local $Tk::widget = $w;
$obj->[4]->Call;
}
sub time {
my $obj = shift;
my $delay = shift;
if (defined $delay) {
$obj->cancel if $delay == 0;
$obj->[2] = $delay;
}
$obj->[2];
}
1;
__END__
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