changing an event listener to a frame event

Question

I have a code in AS3 that works when you rollover it. I need to use the same code but not with an eventlistener for a mouse event but a frame event when the timeline plays the clip. any help?

var coordX:Number = shaker_mc.x;
var coordY:Number = shaker_mc.y;
var timer:Timer = new Timer(10);

shaker_mc.buttonMode = false;

shaker_mc.addEventListener(MouseEvent.MOUSE_OVER,startShake);
shaker_mc.addEventListener(MouseEvent.ROLL_OUT,stopShake);
timer.addEventListener(TimerEvent.TIMER, shakeImage);

function startShake(e:MouseEvent):void{
   timer.start ()
}

function stopShake(e:MouseEvent):void
{
   timer.stop();
   shaker_mc.x = coordX;
   shaker_mc.y = coordY;
   shaker_mc.rotation = 0;
}

function shakeImage(event:Event):void {
   shaker_mc.x = coordX+ getMinusOrPlus()*(Math.random()*5);
   shaker_mc.y = coordY+ getMinusOrPlus()*(Math.random()*5);
   shaker_mc.rotation = getMinusOrPlus()* Math.random()*6;
}

function getMinusOrPlus():int{
var rand : Number = Math.random()*2;
   if (rand<1) return -1
   else return 1;
}

clbeech · Answer

hmmm - well i'm not quite certain what you're looking for exactly, do you mean that you would like it triggered when a specific frame or label is hit? in this case one could monitor the frame number using an EnterFrame event listener, and a condition checking currentFrame or currentLabel properties.

another thought here is that you could use the addedToStage event, so that when shaker_mc is instantiated it trigger the shake.

and yet another methodology would be to use an event broadcaster placed directly on the frame you wish to use as a trigger, then add a listener to the clip that invokes the handlers. for instance, on the frame you wish to 'start' the shake, in shaker_mc use:

dispatchEvent(new Event(Event.INIT));

- and in the original code use the listener assignment:

shaker_mc.addEventListener(Event.INIT, startShake);

- same with the 'stop', on the frame you wish to stop the shake use:

dispatchEvent(new Event(Event.COMPLETE));

- and in the original:

shaker_mc.addEventListener(Event.COMPLETE, stopShake);

with the event listeners assigned in this way you could add as many dispatches as you would like as on succesive frames within the MC.

just some thoughts

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