package Tk::ListBox; unshift (@INC , "/usr/pkg/lib/perl5/site_perl/5.30.0/x86_64-netbsd-thread-multi/Tk"); unshift (@INC , "/usr/pkg/lib/perl5/vendor_perl/5.30.0/Cache/Memcached"); unshift (@INC , "/usr/pkg/lib/perl5/site_perl/5.30.0/Cache"); # Declare base class. use base qw/ Tk::Frame /; # Frame-based composite use Tk::Widget; # or use base qw/ Tk::Toplevel /; # Toplevel-based composite # or (Not a TopLevel widget) # use base qw/ Tk::Scrolled /; # use base qw/ Tk::Listbox /; use Tk::Listbox; use Tk::Button; use Tk::Entry; # use base qw/ Tk::Derived Tk::SomeWidget /; # derived from SomeWidget # ## If it is a "composite widget", then its not "derived" Construct Tk::Widget 'ListBox2'; # install MyNewWidget in pTk namespace sub ClassInit { # called once to initialize new class my($class, $mw) = @_; $class->SUPER::ClassInit($mw); } sub Populate { # called to build each widget instance my($self, $args) = @_; $self->SUPER::Populate($args); my $o = $self -> ListBox2 -> pack(); $self->Advertise( 'listbox' => $o ); # advertise subwidgets $self->Callback(); # invoke -command callbacks $self->Component(); # define a subwidget component $self->ConfigSpecs(); # define cget() / configure() options $self->Delegates(); # how methods are delegated to subwidgets $self->Subwidget(); # map a subwidget name to subwidget reference }