Yes, I think linking the controllers would be the way I would want to
implement it because that is basically what our Win client does and I would
need to replicate it as much as possible to reduce the amount of logic I
would need to provide. It looks like I need to do some homework and learn
this new stuff so I can start to prepare my app to use it. And viewing your
virtual table withs it's speed tells me that I need to convert all my tables
to virtual tables to help speed things along as well.
Thanks again for the information.
Jim
On Tue, May 19, 2009 at 2:46 PM, panyasan <[email protected]> wrote:
>
> Hi Jim,
>
>
> Jim Hunter wrote:
> >
> > Very nice demo, as always! I have not been following the data binding
> > threads much so please forgive me now if my questions are obvious. You
> > mention that data stores can be bound to other data stores, I am going to
> > infer that this means if one data store changes (say via selecting a new
> > row
> > in a table) that it can trigger another data store to update and then any
> > bound controls of that data store would then update? I hope this makes
> > sense. What I have lots of in my application, are tables that the data in
> > them is dependent on the selected row of another table. What I do right
> > now
> > is when the selection changes on any table (because I do not know
> > relationships at design time) I have to send a command to the server to
> > re-fetch all queries and then send a bunch of code back to re-populate
> the
> > tables. Being able to set this up to happen on it's own would be
> > outstanding! I am trying to get a few pieces of my current project to QA,
> > but when I am finished I think I will dive head first into data binding
> to
> > see how much easier my life is going to get with it.
> >
>
> A behavior like the one you decribe has been the focus of the current
> databinding implementation in qooxdoo with the bind() method. There was an
> email by Martin with a slide show that explains that in detail. So far,
> however, I haven't integrated this yet, but will do this shortly - it
> should not be too hard to do. It has to go something like this:
>
> We need:
> 1) A table/tree source widget where the user can select something, and its
> controller.
> 2) A marshaler with a property storing the method name for retrieving the
> data from the jsonrpc backend and a property that stores the value(s) to
> pass to the method. A change of this property will trigger the rpc request.
> 3) The jsonrpc store that is initialized with the service name and this
> marshaler.
> 4) The target tree/table widget, and its controller, bound to the jsonrpc
> store.
>
> Now we nee to bind a property of the source widget which contains the
> values
> of the currently selected row to the marshaler property which triggers the
> request, which will then trigger an update of the target. Or we put this
> property at the controller level, so that only the controllers talk to each
> other:
>
> source-widget <==> source-controller <==> target-controller <==> target
> store <==> target widget
>
> so that the business logic does not need to know what store is involved.
> that is probably a better idea. Martin, do you have suggestions?
> --
> View this message in context:
> http://www.nabble.com/Databinding-for-qx.ui.table.Table-and-qx.ui.treevirtual.TreeVirtual---first-alpha-version-tp23622558p23624973.html
> Sent from the qooxdoo-devel mailing list archive at Nabble.com.
>
>
>
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