https://blog.arcanelab.com/tags/help/Recent content in Help on Arcanelab BlogHugoen-USZoltán MajorosFri, 24 Oct 2008 23:55:00 +0200https://blog.arcanelab.com/2008/10/as3-joy-and-frustration-in-the-past-few-weeks-ive-been/Fri, 24 Oct 2008 23:55:00 +0200https://blog.arcanelab.com/2008/10/as3-joy-and-frustration-in-the-past-few-weeks-ive-been/<h1>AS3 joy and frustration</h1> <p>In the past few weeks I&rsquo;ve been digging into the realms of the Actionscript world as much as I could. (And I was never as excited about any programming language before as I am about AS3.) I&rsquo;ve been reading <b>tons </b>of documentations (primarily <a target="_blank" href="http://www.adobe.com/go/programmingAS3">this</a> one, several times), and still I have black spots even on pretty basic stuff.</p> <p>For example, take this code:</p> <pre class="sh_cpp">package <br/>{<br/> import flash.display.Sprite;<br/> import flash.events.*;<br/><br/> public class Main extends Sprite <br/> {<br/><br/> public function Main():void <br/> {<br/> if (stage) init();<br/> else addEventListener(Event.ADDED_TO_STAGE, init);<br/> }<br/><br/> private function init(e:Event = null):void <br/> {<br/> removeEventListener(Event.ADDED_TO_STAGE, init);<br/> // entry point<br/><br/> graphics.beginFill(0x7f7f7f);<br/> graphics.drawCircle(300, 300, 300);<br/> graphics.endFill();<br/><br/> addEventListener(MouseEvent.MOUSE_MOVE, handler);<br/> }<br/><br/> private function handler(e:MouseEvent):void<br/> {<br/> trace(e);<br/> } <br/> } <br/>}<br/><br/><br/></pre> <p>Seems pretty trivial, eh? The problem is that if I attach an event-listener to the main class of the swf file (as I did in the example above), seemingly no <b>MouseEvent</b> will be dispatched to the handler. If I add the very same event-listener to the <i>stage</i>, the mouse events suddenly start to be delievered.</p>