RE: [flexcoders] Re: changing out pieSeries.itemRenderer at runtime

Mon, 19 Jun 2006 09:15:28 -0700

 
 
 
The ClassFactory class has a property called 'properties.'  This is a hash table (object) full of key/value pairs that get applied to instances generated by the ClassFactory as necessary. So in your case, your markup is saying 'create a PieCategoryWedgeRenderer, and when it gets created, assign an array of PieCategory objects to its categories property as needed'.
 
So you could do this:
 
var cf:ClassFactory = new ClassFactory(PieCategoryWedgeRenderer);
var tmp:Array = [];
var pc:PieCategory = new PieCategory();
pc.value = "Encouraged";
pc.color = 0x99ff99;
tmp.push(pc);
pc = new PieCategory();
pc.value = "Acceptable";
pc.color = 0x9999ff;
tmp.push(pc);
...
cf.properties = { 
    categories: tmp;
}
 
 
Alternatively, you could just copy the whole PieCategoryWedgeRenderer tag and contents from your markup into a separate MXML (call it MyPCWedgeRenderer.mxml) file to create a pre-customized subclass.  then:
 
var cf:ClassFactory = new ClassFactory(MyPCWedgeRenderer);
 
and you're done.
 
 
Ely.
 

From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Jason
Sent: Saturday, June 17, 2006 9:39 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: changing out pieSeries.itemRenderer at runtime

Okay, good start.  I was thrown off by the help topic"Flex 2.0 Developer's Guide > Customizing the User Interface > Using Item Renderers and Item Editors > Creating an item renderer and item editor".  It still uses the old non-setStyle method to set the itemRenderer.

Now how do I build this in code:

          <mx:itemRenderer>
              <mx:Component>
                  <nes:PieCategoryWedgeRenderer>
                      <nes:categories>
                          <nes:PieCategory value="Encouraged" color="#99FF99"/>
  &nbs! p;                       <nes:PieCategory value="Acceptable" color="#9999FF"/>
                          <nes:PieCategory value="Risk" color="#FFFF99"/>
                          <nes:PieCategory value="High Risk" color="#FF9999"/>
                      </nes:categories>
                  </nes:PieCategoryWedgeRenderer>
              </mx:Component>
          </mx:itemRenderer>


I've gotten this far:
public var riskRenderer! :ClassFa ctory = new ClassFactory(nes.charts.dataRenderers.PieCategoryWedgeRenderer);

Sadly, I'm lost after that.  I can't figure out how to add the categories.  Any tips?


--- In flexcoders@yahoogroups.com, "Ely Greenfield" <[EMAIL PROTECTED]> wrote:
>
>
>
> Item Renderer is a style. so you have to do this:
>
>
> ps.setStyle("itemRenderer", ... );
>
>
> What do you pass in as the value?
>
> 1) Passing null doesn't work. You've overridden the style, so you need
> ot set a new value. The default value is the class
> mx.charts.renderers.WedgeItemRenderer.
>
> 2) itemRenderers are typed as IFactory. Meaning they need to be an
> object that implements the IFactory interface. Flex ships with a
> default IFactory that simply wraps a class, called ClassFactory.
> So you want to do this:
>
> import mx.charts.rende! rers.WedgeItemRenderer;
>
> ps.setStyle("itemRenderer", new ClassFactory(WedgeItemRenderer));
>
> you'll probably have to import ClassFactory too...I don't remember what
> it's package is (probably mx.core), but you can find it in the AS doc
> reference.
>
> Ely.
>
>
> ________________________________
>
> From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
> Behalf Of Jason
> Sent: Friday, June 16, 2006 4:19 PM
> To: flexcoders@yahoogroups.com
> Subject: [flexcoders] changing out pieSeries.itemRenderer at runtime
>
>
>
> Okay, so I've made an itemRenderer for a pieSeries. But sometimes I
> want to turn it off. How might I go about that?
>
> <mx:PieSeries id="ps" field="time" labelPosition="insideWithCallout"
> labelFunction="getLabel"
> dataProvider="{chartData}" insideLa! belSizeLimit="10"
> fontSize="10">
> ! <mx:i temRenderer>
> <mx:Component>
> <nes:PieCategoryWedgeRenderer>
> <nes:categories>
> <nes:PieCategory va! lue="Encouraged"
> color="#99FF99"/>
> <nes:PieCategory value="Acceptable"
> color="#9999FF"/>
> <nes:PieCategory value="Risk"
> color="#FFFF99"/>
> <nes:PieCategory value="High Risk"
> color="#FF9999"/>
> </nes:categories>
> </nes:PieCategoryWedgeRenderer>
> </mx:Component>
> </mx:itemRen! derer>
> </mx:PieSeries>
>
>
> < /font>PieCategoryWedgeRenderer is a class I wrote that I mentioned in
> another thread. So now in some function in the applicatio! n, I want to
> say:
>
> ps.itemRenderer = null;
>
> or even
>
> ps.itemRenderer.categories[0].value = "NewTitle";
>
> I've read through all the help and can't figure out how I would actually
> do that. FB says it has no idea what "ps.itemRenderer" is referring to.
> So that kinda stumps me.
>

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