Can't change Movieclip's current frame while setting depths of Movieclip's children - actionscript-3

Question

I'm trying to set the depth of every MovieClip contained in one big MovieClip called 'map'.
To do this, I made a function that runs on event ENTER_FRAME, i.e :
public function set_depth(map:MovieClip) {
var arr:Array = [];
for(var i=1;i<=map.numChildren;i++) {
arr.push({ "name" : map.getChildAt(i-1).name, "y" : map.getChildAt(i-1).y});
}
arr.sortOn("y", Array.NUMERIC);
for(var h=0;h<arr.length;h++) {
map.setChildIndex(map.getChildByName(arr[h].name), h);
}
}
What the function basically does is to sort MovieClip based on its y property and set the MovieClip index
based on the ordererd list of the MovieClips (the y property would eventually change on its own so the
index order will change too). The problem is, I can't seem to change the 'map' MovieClip frame
while the 'set_depth' function continously runs, for example I wanted to change the map current frame everytime
I pressed the Shift key which looked like this :
public function whenKeyUp(e:KeyboardEvent) {
if(e.keyCode == 16) {
trace('Shift pressed');
map.gotoAndStop(2);
}
}
Nothing's happened everytime I pressed Shift, eventhough the trace function gets called. However, if the
'set_depth' function gets commented/deleted, the map MovieClip changed its frame to 2 without any problem.
So, is there anyhting wrong with the code? Can I somehow fix it so that the map MovieClip can change
its frame while the set_depth function runs? Or is there any other solutions? Thanks in advance. Pardon my English

Answer 1

Assuming setDepth(map) is called from function yourEnterFrame(e: Event)..
Change this to
public function whenKeyUp(e:KeyboardEvent) {
if(e.keyCode == 16) {
map.removeEventListener(Event.ENTER_FRAME, yourEnterFrame);
map.addEventListener(Event.ENTER_FRAME, frameHunt);
trace('Shift pressed');
map.gotoAndStop(2);
}
}
And please add this
public function frameHunt(e: Event){
var map:MovieClip = MovieClip(e.target);
if( map.currentFrame != 2) return;
map.removeEventListener(Event.ENTER_FRAME, frameHunt);
map.addEventListener(Event.ENTER_FRAME, yourEnterFrame);
}