On Feb 5, 2005, at 8:37 PM, Guenther Schmidt wrote:

> Stephan,
>
> that is a bit disappointing to be honest.
>
> A view polling its model is not what I like, I guess I'll stop right 
> here and get back to Dolphin.
>
> The reason why I (briefly) checked back with Squeak was that in 
> Dolphin you (seem) to have to use the standard widgets (while writing 
> fancy UIs being very difficult) and I had seen some screenshots from 
> the Exobox project that were really great.
>
> But when Morphic is about views polling their models in intervals, 
> thanks but no thanks.

Well, you don't *have* to do it that way. Stepping is mostly useful for 
animation. For more traditional widget-style things, the usual 
technique is to use the dependency mechanism.

With PluggableListMorphs, for example, you register your model with the 
list, and give it a selector that it will use to get the list of items 
to display. Then when the list changes, you call self changed: with 
that same selector as the parameter. The list will call that method, 
get the new list items and update its display. No polling.

Most of the other widget-like morphs do the same thing.

Colin