September 7, 2008 09:55pm pdt

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	[x] Attachment Details

Flash AS3 - can you help me associate a custom class with my .fla?

Zones: Web Graphics Software, Miscellaneous Programming, Macromedia Flash

Tags: Adobe / Macromedia, Flash CS3, CS3 / 9

Hello,

I am a complete beginner with AS3 and OOLs but have been trying to read a lot and getting some help in developing a simple flash website. BUT! I still cant understand / find a clear explanation of how to associate my custom button class with my .fla.

I have six movieclip buttons each slightly different and am trying to communicate with them without writing a new function for each button.

A very helpful expert pointed me in the direction of the code attached below. However when I try to link the class to each movie clip in the library Flash tells me I have to enter... a unique class name not associated with any other symbols!!?

Does this mean I have to create a class for every button after all?

         
           
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             package{
        //KeyButton.as
        import flash.display.*;
        import flash.events.*;
 
        public class KeyButton extends MovieClip{
                public function KeyButton(){
                        addEventListener(MouseEvent.MOUSE_OVER,keyOver);
                        addEventListener(MouseEvent.MOUSE_OUT,keyOut);
                }
                private function keyOver(e:MouseEvent):void{
                e.currentTarget.gotoAndPlay('over');
                }
                private function keyOut(e:MouseEvent):void{
                e.currentTarget.gotoAndPlay('out');
                }
        }
}

           
         

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7.6

Question Stats

Zone: Software

Question Asked By: keybord

Solution Provided By: julianopolito

Participating Experts: 2

Solution Grade: A

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Comment by keybord

Thanks for your time here guys.

Your last comment sealed this query for me I think Julian and is a nice way of using just the one class. (Though I confess I dont quite understand how I can get away with subsituting the Base class 'flash.display.MovieClip' for my own class but I'm assuming thats cause my own class is an 'extension' of the Movieclip class?)

Anyway this has turned into a very nice primer on AS3 classes and I will keep on with the homework!

Dont be surprised to hear from me again in a few days. = )

Comment by julianopolito

You can change the base class because your class EXTENDS flash.display.MovieClip, so it means your class is a specialized version of MovieClip. That's why you can do that. Then when you specify an non existent class to be the symbol class, flash creates an empty class for automatically. This class extends the base class KeyButton

20080723-EE-VQP-34 / EE_QW_2_20070628