Hi,
I didn't receive Lachlan's reply earlier (I'm obviously not receiving
everything from the group :/)
So I'll reply to both of you here, ok?
Tracy:
I realise that the XML class is a dom, but that doesn't allow me to have TYPED
entities, does it? Also with classes I can include validation code, etc. in the
getters/setters.
I can't do this with the XML class, can I?
-----------
Lachlan:
Yes, I am trying to unmarshal the XML into custom classes as you say.
A bit of background wouldn't hurt ...
The XML describes a "document" where each line is EITHER some text, OR (up to
3) graphics, OR a barcode, or a couple of other entities.
It's all XML, nodes and attributes, but not very regular.
A line/node could look like:
<text alignment="centred" font="A" charheight="2" emphasis="b">Name: <field
key="fullname"/></text>
OR
<graphics valign="middle">
<image alignment="left">vicdpi.jpg</image>
<image alignment="right">sunset.jpg</image>
</graphics>
OR
<barcode type="code128" alignment="centred" height="16"><field
key="pin"/></barcode>
So that each line needs a different customItemRenderer. Since the document is
discretely line-based in structure, I thought a 1-column datagrid suited it
well.
I tried dynamically rendering elements (in form structures) thru AS, but that
proved to be pretty messy ... I could go back to it, but I'd rather not.
Yeah, I figured ICollectionView but I'm not actually sure how to assign it ...
I've discovered Aral Balkan's notes on "Designing Data Models", that might
clear it up for me.
Cheers
John
-----Original Message-----
From: Tracy Spratt [mailto:[EMAIL PROTECTED]
Sent: Tuesday, 5 December 2006 8:12 AM
To: flexcoders@yahoogroups.com
Subject: RE: [flexcoders] Class-based model as a dataprovider
John, can you use the XML class? It already IS a dom.
Tracy
_____
From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Lachlan
Cotter
Sent: Sunday, December 03, 2006 11:08 PM
To: flexcoders@yahoogroups.com
Subject: Re: [flexcoders] Class-based model as a dataprovider
Hi John,
Sorry if I missed the point but I'm not entirely clear on what you're trying to
do here. Do you want to unmarshal your XML into an object graph of custom
classes? I don't understand how the multiple renderers comes into it. What is
the XML describing? Is it a result set or something less regular?
With regard to point 2, I think anything can be a dataProvider if it implements
one of the accepted interfaces. IList, ICollectionView etc.
Cheers,
Lach
On 04/12/2006, at 11:57 AM, John Mazzocchi wrote:
Hi, I need a hand here ...
I have an app which reads an XML file, shoves everything into an
XMLListCollection and then renders the collection to a one-column datagrid.
Each row of the datagrid uses a (state-based) customItemRenderer [don't get me
started on the problems I've had with ViewStack-based approach].
Anyway, it seems to work fairly well ... but I've now been asked to take a
slightly different approach. The XML needs to be shoved into an Object Model (a
custom DOM), so that the same data can have multiple renderers/converters
created in the future (not just "renderToScreen")... renderToPDF, renderToCSV,
etc. Now there are notes in the PDF docs on creating a Class-based model ... I
figure I'm gonna create an array of Objects, each one typed as they need to be,
you know Bool, Text, Graphics, customSetOfAttribs, whatever ... custom addItem
and removeItem functions which use templates for each Object type.
1. Any comments on my methodology?
2. How do I assign an ActionScript class as a dataprovider (for a datagrid)?
Thanks.
Cheers
John
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