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: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of barry.beattie Sent: Thursday, September 06, 2007 11:27 PM To: [email protected] 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); }
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