[albatross-users] al-for firstpage, nextpage, and gotopage

[Greg Hamilton]

I revisited the code this morning and, after a little head-scratching,  
I pulled out the relevant bits and created a little example app which  
you can see in action here:

http://www.object-craft.com.au/cgi-bin/paged-example/app.cgi

or download the source tarball here:

http://www.object-craft.com.au/paged-example.tar.gz

The example app navigates a table off 500 rows of 20 elements of random  
numbers. I limit the number of rows per page to 15 which gives you 34  
pages to peruse.

The Albatross <al-for> tag uses the Albatross ListIterator class and  
already supports pagination. I've written a subclass of ListIterator,  
called PagedListIterator, which adds methods for getting and setting  
the current page or range of pages.

Note, normally Albatross will automagically create a ListIterator  
instance when it encounters an <al-for> loop in a template. To force  
Albatross to use a PagedListIterator instead you need to add the  
iterator instance to ctx.locals before the template is processed.

In the 'page_enter' method of 'page.py' I create the iterator and add  
it to the session vars, something like this:

	def page_enter(ctx):
     		ctx.locals.rows_iter = PagedListIterator()
    		ctx.add_session_vars('rows_iter', )

In the template 'page.html' the <al-for> loop which uses  
'iter="rows_iter"' will use this PagedListIterator instance.

Greg


On 06/03/2004, at 6:16 AM, Michael C. Neel wrote:

> Dave said a while back that Greg(?) had implemented these without
> extending/altering Albatross, and that he could post some code showing
> how it was done.  Can we get that code? =p
>
> Mike
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