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I don't think you'll have to build out every possible combination into different View subclasses. Using the approach outlined in the GitHub Contributors example app ( http://yuilibrary.com/yui/docs/app/app- ... page-views ), you could parameterize the main/page views to take subviews during instantiation.

I think I have found my main concern here about subviews.

I would like to share a sub-view instance between different pageViews.

Is that possible?

The way the examples are setup, when you change a top-level pageView, the previous pageview along with all subviews are removed from the dom, or saved, and the app container is re-rendered anew with a new pageView containing new subview instances.

But is it possible to preserve some of these subviews so I don't have to rerender them for each pageView change, instead sharing them between different pageViews?

Edit: right now I am considering just rendering all possible views in left, main, and right columns of my app, and using Router callbacks to change (hide/show) between active views for each column.

But this means I wont be using the App part of the framework at all ;(

Edit 2: Hmm unless I've misunderstood something, it seems like the App component is best suited to handle simple webapps/widgets or mobile phone apps where you usually need to change the whole app UI (the whole screen) for each view, but not so well suited for desktop webapps where the screen is larger and you usually split the screen into independent parts, like the traditional left-/main-/right-column setup i described earlier.

Ok, this example was somewhat of a revelation for me.

Thanks a lot for taking time to give me an example. I appreciate it. \o/

I guess this is not so much different from what is being shown in the examples in the documentation, but maybe it was because it was more simple that I finally get it this time.

Seems to be great work you guys are doing!

I am really excited about porting our webapp Filecamp - http://filecamp.com - over to using the new App framework - hope it wont change too much during beta, heh

Once I'm done in a couple of months I'll be much more experienced in using it, and will provide you with some feedback if I feel I have anything relevant to suggest/comment on.

Thanks again.