Re: [cgiapp] Implementing "back" and "next" buttons within the application

["Steve Comrie" <suppressed>]

Take a look at the HTML::Pager module written by Sam Tregar author of
HTML::Template.

----- Original Message ----- 
From: "Jason Parker-Burlingham" <suppressed>
To: <suppressed>
Sent: Sunday, May 04, 2003 4:32 PM
Subject: [cgiapp] Implementing "back" and "next" buttons within the
application


> I'm writing a medium-to-small application for my own edification in
> CGI::Application and have come up against something of a wall.  At
> times I have a number of screens full of information to present and
> I'd like to allow the user to browse back and forth between them.
>
> I've written code to accept a pair of "offset" and "size" parameters
> (I'm not concerned if users want to meddle with these settings,
> really) and present the appropriate amount of data.  The sticking
> point comes when I'm writing the code to process my templates;
> obviously the URLs used to create the (say) 'next' button will have to
> preserve some state.
>
> Right now, as something of a hack[1], I'm calling C<self_url> on my
> CGI object and appending to that:
>
>         $q->self_url.'&offset='.($offset+50);
>
> But this strikes me as pretty inelegant.  My only other thought is to
> create a copy of the CGI object and re-set the params as necessary:
>
>         my $r = $q->copy; # uses a fictional CGI.pm method
>         $r->param('offset', $r->param('offset') + $r->param('size'));
>         # create "next" link using $r
>
> I'm not sure this is much better.
>
> Any opinions?
>
> Cheers,
>
> jason
>
> [1] : Actually this isn't true since I gave up on this problem while
>       working to have the application use the Template Toolkit.  But
>       the approach is similar.
> -- 
> ``Oooh!  A gingerbread house!  Hansel and Gretel are set for life!''
>
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