Yes, browse.py could use some cleaning up and better comments. For short lists SimpleListWalker is just fine. Yes, it should contain a list of flow widgets.
Ian Dominic LoBue wrote: > Ian, > > Thanks for clearing that up for me. I've looked through browse.py > several times, but I just get lost every time. I really don't need > anything more complex than the SimpleListWalker or the > PollingListWalker, as I'm not planning on showing anymore more than a > short summary of the conversation. I don't have any plans to expand > the conversation in the index view. > > I take it that while SimpleListWalker acts like a regular list, its > supposed to be a list of widgets, correct? Meaning that the data would > be structured from the ListBox on down like so: > urwid.ListBox( > urwid.SimpleListWalker([ > urwid.Button(conversation), urwid.Button(conversation) ])) > > > Dominic > > On Fri, Jun 19, 2009 at 5:46 AM, Ian Ward<[email protected]> wrote: >> A ListWalker is used by the ListBox class to determine what widgets are >> displayed in the ListBox, without the ListBox needing to know how that >> list is generated. >> >> SimpleListWalker acts like a regular list, so you can add and remove >> items from it and the ListBox will be updated. >> >> PollingListWalker is a class for maintaining backwards compatibility >> with old versions of Urwid that would let you pass a list in to the >> ListBox constructor. It has to check the list contents each time the >> ListBox may be updated, making caching useless. You don't want to use >> it for new code. >> >> What you need is your own custom ListWalker class. See the browse.py >> example, it has a custom ListWalker that displays a tree view of files >> on the filesystem, with the ability to expand and collapse that tree. >> >> Ian >> >> Dominic LoBue wrote: >>> Hello, >>> >>> I'm writing an email reader with urwid, but I'm confused as to how the >>> SimpleListWalker class works. Is it just a metaclass that you can >>> extend to make writing your own custom listwalker easier, or should >>> you be able to use it on its own? >>> >>> Also, what's the difference between SimpleListWalker and >>> PollingListWalker? My application is going to thread emails and the >>> index view is going to show conversations (like gmail), with >>> conversations with recent activity pushed to the top, so I'm not sure >>> which walker is more appropriate, or if its even necessary to bother >>> with. >>> >>> Keep up the good work with urwid! >>> >>> Dominic >>> >>> >>> _______________________________________________ >>> Urwid mailing list >>> [email protected] >>> http://lists.excess.org/mailman/listinfo/urwid >>> >> >> >> _______________________________________________ >> Urwid mailing list >> [email protected] >> http://lists.excess.org/mailman/listinfo/urwid >> >> > > > _______________________________________________ > Urwid mailing list > [email protected] > http://lists.excess.org/mailman/listinfo/urwid > _______________________________________________ Urwid mailing list [email protected] http://lists.excess.org/mailman/listinfo/urwid
