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POActionscript 3 for Android - should I attach mouse event listeners to the stage or to individual sprites?
 

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  1. POActionscript 3 for Android - should I attach mouse event listeners to the stage or to individual sprites?
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    <p>In AS3 on Android is it bad from a performance perspective to attach mouse event listeners to individual sprites rather than to the stage?</p> <p>I am writing an app for an Android phone using AS3 in Flash Builder. The app has multiple screens that respond to user touch. The screens are arranged in a hierarchy and show list data so that when you click on an item in a list you are presented with a new screen with a new sub list on it.</p> <p>I have been using an event listener to detect mouse / touch input and based on something I read that indicated that performance is much better if you keep the number of objects you are listening to to a minimum I have attached the mouse listeners from each screen to the stage object.</p> <p>This all works fine but I am finding that as I move between screens (and they get popped or pushed onto the dislay stack) I have to keep track of alot of adding and removing listeners to the stage object. If I don't then windows higher up the hierarchy than the current screen keep receiving mouse events.</p> <p>If I used listeners attached to sprites in each window then when the window was removed from the display even though it is kept in memory (ready to be popped back when a child window is closed) it won't receive any mouse events....</p> <p>Performance doesn't seem to be impacted using listeners directly on sprites when using my HTC phone to test with, however I obviously don't know what it will be like on other phones. Does anyone have any experience either way or a view on the best approach?</p>
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    1. USleafcutter
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    1. COWhen you attach a Listener to the stage, you then have to check the coordinates of the event to match it to a sprite? or how do you do that?
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    2. COThere are localToGlobal functions on display objects that do that conversion. In this particular case though the sprites are almost full screen so the conversion is easy.
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