public property and instantiation of the component problem

Hello everyone.

I tried to tackle the flow of instantiating components and do things in the right way, but I seem to run into problems.

For example, I have a custom, with some variable public properties exposed component. I create my component and set my variables like this:

PARENT

BTN = new ConditionBtn();

btn.aXML = myXML;

btn.addEventListener ("change", answerChangeHandler);
this.addChild (btn);


And inside my component, I am trying to manage the instantiation like this:

CHILD COMPONENT

private var isSelected:Boolean;

before initialize event handler

private function preInitialize (): void {}
}

initialize the event handler
private void initialize (): void {}

If (aXML.@selected == "true") {}

selected = true;

} else {}

selected = false;

}
}

the creation complete event handler
private void creationComplete (): void {}
}

This does not work well because when the initialize event fires, aXML shows that NULL when debugging. It is not sensible to me, but because the initialize event is not raised until I call this.addChild of the parent, which is done AFTER I put the value of aXML in my component so you would think that data should be there already.

I tried to move the logic in the creationComplete handler but aXML is always set to null at this point. The work around I'm doing creates another function I call hand after I add it to the scene like this:

PARENT

BTN = new ConditionBtn();

btn.aXML = myXML;

btn.addEventListener ("change", answerChangeHandler);
this.addChild (btn);

btn.bindManually ();

CHILD COMPONENT

private var isSelected:Boolean;
public function bindManually (): void {}

If (aXML.@selected == "true") {}

selected = true;

} else {}

selected = false;

}
}

Now it works, but this seems like a very bad practice. Isn't that the point of all the pre-init and initialize events is to allow you to configure your component prior to when he emerges finally everything is configured and that it should not be re - install?

I'm doing something wrong?

Ago a well defined lifecycle you use that involve createChildren(), commitProperties, measure and updateDisplayList.  See the doc on creating custom components

Alex Harui

Flex SDK Developer

Adobe Systems Inc..

Blog: http://blogs.adobe.com/aharui

Tags: Flex

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