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POBetter practice for Flash AS3 RIA development - using events/listeners, or allowing children to call functions in parents?
 

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  1. POBetter practice for Flash AS3 RIA development - using events/listeners, or allowing children to call functions in parents?
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    <p>I'm working on a web app built in Flash AS3.</p> <p>At a high level - the app has a main screen, and several "modal dialog"-type screens that pop-up to manage various user interactions.</p> <p>(This is a similar pattern I use in most of the apps I develop...)</p> <p>Typically - when the user clicks a UI control on the dialog screen (e.g., button, text box, slider bar, etc.) - the main screen needs to react, or manage the consequences.</p> <p>It seems like there are two general ways to handle this:</p> <ol> <li>Have the dialog screen dispatch events that the main screen listens for</li> <li>Allow the dialog screen to call functions in the main screen when those controls are clicked (which requires that the dialog screen maintain a reference to the main screen, and that the functions in the main screen are public)</li> </ol> <p>In general - I understand that one of the key benefits of the first method is that the dialog screen isn't so tightly coupled; it's only responsibility is to broadcast the event. This would allow me to more easily use the dialog class in other contexts, or applications.</p> <p>But for many RIAs I develop - a particular screen is <strong>SO SPECIFIC</strong> to the the application that there's no chance I'd ever reuse it in another application. So, the "easy re-use" benefit is minimal.</p> <p>So - if you eliminate that benefit - which method is actually better? (More performant, less resource-intensive?)</p> <p>For example - if I use events, then Flash needs to manage many listeners for events that may never occur. So - it <em>might</em> be more efficient if the dialog window could call a function in the main screen directly, instead of dispatching an event.</p> <p>Which method is a better practice? What other benefits/pros/cons are there for each method?</p> <p>Many thanks in advance.</p>
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    1. USmattstuehler
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