Hi, responding to the first question;
Why not use styles for that? We as developers need to understand there are 3 interfaces into a UIComponent. 1. Events 2. Styles 3. Class API With that said, dealing with your example class; public class LabeledRenderer2 extends UIComponent implements IDataRenderer { ... public function LabeledRenderer2():void { super(); } override protected function createChildren():void { super.createChildren(); _label = new Label(); _label.styleName = this; addChild(_label); } } Then you can use this to default and also have the ability to change things a runtime in a cascading way. LabeledRenderer2 { color:#FFFFFF; fontWeight:"bold"; etc... } or var style:CSSStyleDeclaration = StyleManager.getStyleDeclaration(""); style.setStyle("color", 0x242424); Is the right way to do it. Keep in mind, when you develop a lot you will more than likely someday reuse this code. This is utilizing the the Style interface the way it should in a balanced way. Peace, Mike On 9/7/07, Ely Greenfield <[EMAIL PROTECTED]> wrote: > > > > > > > > The answer is: Generally, yes, subclasses can add or modify arguments. > But in scenarios where you are passing a class around to be instantiated by > other code, your class constructor needs to conform to whatever contract is > defined by that code. > > > > In this case, the contract defined by charts is a little different. They > don't get passed a Class, but rather an implementation of IFactory. > Normally, you specify the class in MXML, and the compiler automatically > creates that instance for you. But you could create your own instance of > IFactory that does whatever it wants. For example, you could write an > IFactory implementation that has a 'color' property which it passes to the > constructor it instantiates. > > Ely. > > > > > > *From:* flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] *On > Behalf Of *barry.beattie > *Sent:* Thursday, September 06, 2007 11:27 PM > *To:* flexcoders@yahoogroups.com > *Subject:* [flexcoders] constructors in extended components: can they take > arguments? > > > > the docs seem to hint "no" because (in this case) it changes the > signature from the base class ... but I just need to check. > > within a chart I'm using the itemRenderer for each series in a BarSet. > I need some way to tell it that it's processing a different series > than the one before so it'll use a different fill colour. Passing in a > simple number from the MXML would be so handy here... > > public class LabeledRenderer2 extends UIComponent implements IDataRenderer > { > ... > public function LabeledRenderer2():void > { > super(); > _label = new Label(); > addChild(_label); > _label.setStyle("color", 0xFFFFFF); > } > > > > -- Teoti Graphix http://www.teotigraphix.com Blog - Flex2Components http://www.flex2components.com You can find more by solving the problem then by 'asking the question'.