Drag Game Puzzle with custom dispatch event - actionscript-3

Question

i'm creating a drag puzzle game, and i need to resolve an issue, two to be exact:
a) Make a check if all the objects from dragArray variable are in the same place as the ones from matchArray.
b) If so, then display a button and play a sound file. (The button is *play_btn* and it plays a sound file when clicked, but i also need the sound to be played once the puzzle is solved so to speak.)
Would add some visual aid, but the forums says I need reputation.
Looking forward for some assistance.
The game is based on this tutorial.
var dragArray:Array = [p1, p2, p3, p4, p5, p6, p7, p8, p9];
var matchArray:Array = [p1_n, p2_n, p3_n, p4_n, p5_n, p6_n, p7_n, p8_n, p9_n];
var currentClip:MovieClip;
var startX:Number;
var startY:Number;
for(var i:int = 0; i < dragArray.length; i++) {
dragArray[i].buttonMode = true;
dragArray[i].addEventListener(MouseEvent.MOUSE_DOWN, item_onMouseDown);
matchArray[i].alpha = 0.2;
}
function item_onMouseDown(event:MouseEvent):void {
currentClip = MovieClip(event.currentTarget);
startX = currentClip.x;
startY = currentClip.y;
addChild(currentClip); //bring to the front
currentClip.startDrag();
stage.addEventListener(MouseEvent.MOUSE_UP, stage_onMouseUp);
}
function stage_onMouseUp(event:MouseEvent):void {
stage.removeEventListener(MouseEvent.MOUSE_UP, stage_onMouseUp);
currentClip.stopDrag();
var index:int = dragArray.indexOf(currentClip);
var matchClip:MovieClip = MovieClip(matchArray[index]);
if(currentClip.hitTestObject(matchClip)) {
//a match was made! position the clip on the matching clip:
currentClip.x = matchClip.x;
currentClip.y = matchClip.y;
//make it not draggable anymore:
currentClip.removeEventListener(MouseEvent.MOUSE_DOWN, item_onMouseDown);
currentClip.buttonMode = false;
} else {
//match was not made, so send the clip back where it started:
currentClip.x = startX;
currentClip.y = startY;
}
}
var my_sound:Sound = new Sound();
my_sound.load(new URLRequest("sounds/song.mp3"));
var my_channel:SoundChannel = new SoundChannel();
play_btn.addEventListener(MouseEvent.CLICK, playSound);
function playSound(event:MouseEvent):void{
my_channel = my_sound.play();
}

Answer 1

You can use a validate function like this one. It will returns true if all drop items are on their targets, false otherwise
function validate(drags:Array, drops:Array):Boolean {
var found:uint = 0
for (var i:uint = 0;i<drags.length;i++ ) {
var drag:MovieClip = MovieClip(drags[i]);
var drop:MovieClip = MovieClip(drops[i]);
found += (drag.hitTestObject(drop)) ? 1 : 0
}
return found == drop.length
}
Then you can use it to check the global interaction :
var result:Boolean = validate(dragArray,matchArray);
if (result) {
// all ok
// play sound...
} else {
// errors
}