This is my first attempt at writing a megawidgit in PERL. I have not been programming for 10yrs. I cant find any concise examples showing what must be in the module, and where the perl subroutines must go. Here is my code.
It runs -- but it only hangs. I assume the widget is not being displayed, and its waiting for to choose something...
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/Memca
+ched");
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 wid
+get)
# 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 SomeWid
+get
# ## If it is a "composite widget", then its not "deri
+ved"
Construct Tk::Widget 'ListBox2'; # install MyNewWidget in pTk name
+space
sub ClassInit
{ # called once to initialize new class
my($class, $mw) = @_;
$class->SUPER::ClassInit($mw);
}
sub Populate { # called to build each widget instanc
+e
my($self, $args) = @_;
$self->SUPER::Populate($args);
my $o = $self -> ListBox2 -> pack();
$self->Advertise( 'listbox' => $o ); # advertise subwid
+gets
$self->Callback(); # invoke -command callbacks
$self->Component(); # define a subwidget component
$self->ConfigSpecs(); # define cget() / configure() options
$self->Delegates(); # how methods are delegated to subwid
+gets
$self->Subwidget(); # map a subwidget name to subwidget r
+eference
}
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|