Re: [flexcoders] custom component dataprovider
On Fri, Apr 18, 2008 at 6:50 PM, Tracy Spratt [EMAIL PROTECTED] wrote:
dataprovider again, right? I had assumed that implementing a dataprovider
would make updates to the UI cleaner (not having to re-create all items),
but I could be wrong on that assumption- don't know yet.
I like to do it like this:
[Bindable]
public function set dataProvider(value :Object) :void {
if (_dataProvider) {
_dataProvider.removeEventListener(
CollectionEvent.COLLECTION_CHANGE,
onDataChange,
false
);
}
_dataProvider = (value is Array)? new
ArrayCollection(value as Array)
: (value is IList)? IList(value)
: (value is XMLList) ? new
XMLListCollection(value as XMLList)
: new ArrayCollection()
;
_dataProvider.addEventListener(
CollectionEvent.COLLECTION_CHANGE,
onDataChange,
false,
0,
true
);
_dataChanged = true;
etc. etc. etc.
Re: [flexcoders] custom component dataprovider
On Sun, Apr 20, 2008 at 9:38 PM, gabriel montagné [EMAIL PROTECTED] wrote: I like to do it like this: _dataProvider = (value is Array)? new where _dataProvider is typed IList.. ... pretty useful and flexible... I'd read it (or something like it) on one Ely Greenfield's carousel, I think.. -- gabriel montagné láscaris comneno http://rojored.com t/506.8392.2040
RE: [flexcoders] custom component dataprovider
Just implement a public setter function on your component that takes XML. In the setter, launch your child instantiation code. I have done this and it can be a bit complex, but is not hard. Tracy From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Derrick Anderson Sent: Friday, April 18, 2008 1:16 PM To: flexcoders@yahoogroups.com Subject: [flexcoders] custom component dataprovider hey everyone, i'm trying to build a custom component based off of a Panel, but the trick is that I would like the panel to accept xml as a dataprovider. where are there any good tutorials on building custom components with dataproviders? btw, the goal is to take an xml node in the dataprovider (box x=10 y=15panel title=test panel //box) and convert them to UI components. Any ideas? thanks, d.
Re: [flexcoders] custom component dataprovider
Hey Tracy, I thought of that but it seems to limit me from what I'm trying to do. I need the UI of this component to respond when the dataprovider changes, I figured the best way would be to implement a dataprovider the way the mx components do it, it seems complicated but I'm getting throught it. Then if I changed the model, the UI would update appropriately. If i just implement the child creation in the setter, then I have to re-parse the whole dataprovider again, right? I had assumed that implementing a dataprovider would make updates to the UI cleaner (not having to re-create all items), but I could be wrong on that assumption- don't know yet. d. On Fri, Apr 18, 2008 at 5:26 PM, Tracy Spratt [EMAIL PROTECTED] wrote: Just implement a public setter function on your component that takes XML. In the setter, launch your child instantiation code. I have done this and it can be a bit complex, but is not hard. Tracy -- *From:* flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] *On Behalf Of *Derrick Anderson *Sent:* Friday, April 18, 2008 1:16 PM *To:* flexcoders@yahoogroups.com *Subject:* [flexcoders] custom component dataprovider hey everyone, i'm trying to build a custom component based off of a Panel, but the trick is that I would like the panel to accept xml as a dataprovider. where are there any good tutorials on building custom components with dataproviders? btw, the goal is to take an xml node in the dataprovider (box x=10 y=15panel title=test panel //box) and convert them to UI components. Any ideas? thanks, d.
RE: [flexcoders] custom component dataprovider
The setter is just an interface into your component property. How you implement the functionality is up to you and is unlimited. You can bind your property to whatever in the app, and the setter will be called when the model changes. The Adobe components implement the dataProvider with a setter I'm sure. If you pass xml into the component in the dataProvider property it will not need to be parsed again. Again, how you respond to the property change is up to you. If you are talking about recycling your children, then that is not about the dataprovider, but about your response to the model change. But if you are on track, then keep going. Tracy From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Derrick Anderson Sent: Friday, April 18, 2008 8:02 PM To: flexcoders@yahoogroups.com Subject: Re: [flexcoders] custom component dataprovider Hey Tracy, I thought of that but it seems to limit me from what I'm trying to do. I need the UI of this component to respond when the dataprovider changes, I figured the best way would be to implement a dataprovider the way the mx components do it, it seems complicated but I'm getting throught it. Then if I changed the model, the UI would update appropriately. If i just implement the child creation in the setter, then I have to re-parse the whole dataprovider again, right? I had assumed that implementing a dataprovider would make updates to the UI cleaner (not having to re-create all items), but I could be wrong on that assumption- don't know yet. d. On Fri, Apr 18, 2008 at 5:26 PM, Tracy Spratt [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: Just implement a public setter function on your component that takes XML. In the setter, launch your child instantiation code. I have done this and it can be a bit complex, but is not hard. Tracy From: flexcoders@yahoogroups.com mailto:flexcoders@yahoogroups.com [mailto:flexcoders@yahoogroups.com mailto:flexcoders@yahoogroups.com ] On Behalf Of Derrick Anderson Sent: Friday, April 18, 2008 1:16 PM To: flexcoders@yahoogroups.com mailto:flexcoders@yahoogroups.com Subject: [flexcoders] custom component dataprovider hey everyone, i'm trying to build a custom component based off of a Panel, but the trick is that I would like the panel to accept xml as a dataprovider. where are there any good tutorials on building custom components with dataproviders? btw, the goal is to take an xml node in the dataprovider (box x=10 y=15panel title=test panel //box) and convert them to UI components. Any ideas? thanks, d.
