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POWhere is "int main()" in my Flex application?
 

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    <p>Well, not literally, of course, but:</p> <p>I'm new to Flex and I'm trying to figure out where to put the code that I want to run when my app starts. In my example, I have a tree control defined in the markup, and I have AS code that can populate it from a local file or a webservice. How do I bind the one to the other such that when the control is created, the code is run?</p> <p>The examples I have found in the documentation all use event handlers, i. e. they put 'creationComplete="myInitFunction(evt)"' in the control's opening tag. That would mean I write a little glue function that initializes things.</p> <p>Now, as I have understood it, the Markup is really converted into AS classes internally. So can I not just define a class that is instantiated by the engine and put my startup code in the constructor? Maybe even like, extending the Tree class?</p> <p><strong>EDIT</strong>:</p> <p>Months later, I'm a lot wiser. After trying to abuse the constructors of extended component classes, I had to learn that Flex doesn't expect the constructors to do much - certainly not loading data off the network.</p> <p>The component life cycle explanation in "Programming Flex 3" was really helpful. Now, my constructors are all empty, and I'm overriding the life cycle methods, such as <code>createChildren</code> for a lot of things, and use events for anything that involves latency or depends on externalities, especially network stuff.</p> <p>For example, I use <code>creationComplete</code> to initiate an asynchronous network request (using <code>HTTPService</code>), when that returns there are ResultEvent and FaultEvent handlers, the ResultEvent updates a data model to which I data-bound my controls. This is seemingly very Flex-y and works great.</p>
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    1. COI wouldn't generally put initialization code in the constructor that pulls data from the web service. Often times it is desirable to construct an object and populate it at a later time, or re-populate it after being constructed.
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