Tk-Bounded
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}
sub Populate {
my( $self, $args ) = @_;
my $flag = delete $args->{-flag};
if( defined $flag ) {
# handle -flag => xxx which can only be done at create
# time the delete above ensures that new() does not try
# and do $self->configure( -flag => xxx );
}
$self->SUPER::Populate( $args );
$self = $self->Component( ... );
$self->Delegates( ... );
$self->ConfigSpecs(
'-cursor' => [ SELF, 'cursor', 'Cursor', undef ],
'-something' => [ METHOD, dbName, dbClass, default ],
'-text' => [ $label, dbName, dbClass, default ],
'-heading' => [ {-text => $head},
heading, Heading, 'My Heading' ],
);
}
sub something {
my( $self, $value) = @_;
if ( @_ > 1 ) {
# set it
}
return # current value
}
sub keybounds {
my( $self, $limit ) = @_;
return $self -> index( 'insert' ) == $self -> index( $limit ) ?
nP : Np;
}
sub testbEv {
my( $self, $m, $t, $s, $c ) = @_;
print "$m, $t, $s, $c\n";
my $bev = $self -> bXEvent;
$m = $bev -> m;
print "$m\n";
$bev = $Tk::bevent;
$m = $bev -> m;
print "$m\n";
my $w = $Tk::bwidget;
print "$w\n";
}
=head1 DESCRIPTION
Tk::Bounded is used with Perl's multiple inheritance to override some methods
normally inherited from Tk::Derived and Tk::Widget. It also specifies level 1
bound tags for caller class.
Tk::Bounded should precede any Tk widgets in the class's base class definition.
Tk::Bounded's main purpose is to apply wrappers to C<configure> and C<cget>
methods of widgets to allow the derived widget to add to or modify behaviour
of the configure options supported by the base widget.
The bounded class should normally override the C<Populate> method provided by
Tk::Bounded and call C<ConfigSpecs> to declare configure options.
The public methods provided by Tk::Bounded are as follows:
=over 4
=item -E<gt>ConfigSpecs(-I<key> =E<gt> [I<kind>, I<name>, I<Class>, I<default>],
...)
=back
=head1 SEE ALSO
L<Tk::Derived|Tk::Derived>
L<Tk::ConfigSpecs|Tk::ConfigSpecs>
L<Tk::mega|Tk::mega>
L<Tk::composite|Tk::composite>
L<Tk::bound|Tk::bound>
L<Tk::boundtags|Tk::boundtags>
=cut
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