Stop clock on pause button - actionscript-3

Question

I have a "clock" counting down the time of the game (from 9 seconds to 0 seconds). I have a button that pauses the game, so I want to freeze de clock and when I click to play, the game continuos from that second that I frozen. But I don't have any idea how to do this! Can you help me please?
this.addEventListener(Event.ENTER_FRAME, updateTimer);
function updateTimer(e:Event){
var t:uint = getTimer();
var dt:uint = 9000 - t;
var totseconds:uint = Math.floor(dt/1000);
var minutes:uint = Math.floor(totseconds/60);
var seconds:uint = Math.floor(totseconds%60);
var minsWithZ = minutes < 10 ? "0" + minutes : minutes;
var secsWithZ = seconds < 10 ? "0" + seconds : seconds;
var time = minsWithZ + ":" + secsWithZ;
this.tempo_txt.text = time;
}
pausa.addEventListener(MouseEvent.MOUSE_UP, menuPause);
function menuPause(e:MouseEvent){
...somegame code...
voltar.addEventListener(MouseEvent.MOUSE_UP, play);
}
function play (e:MouseEvent){
...some game code
}

Answer 1

You have two choices at least:
1-Andre's answer;
2-my answer:
import flash.events.Event;
var dt:int = 9000
var diff:Number=0;
var prevDiff:Number=0;
var currentTime:Number=0;
var t:uint=0;
var totseconds:int=0;
var minutes:int=0;
var seconds:int=0;
var minsWithZ;
var secsWithZ;
var running:Boolean=true;
var time;
this.addEventListener(Event.ENTER_FRAME, updateTimer);
function updateTimer(e:Event){
if(dt<1){dt=1;menuPause(null)}
trace(running);
totseconds= Math.floor(dt/1000);
minutes= Math.floor(totseconds/60);
seconds= Math.floor(totseconds%60);
minsWithZ = minutes < 10 ? "0" + minutes : minutes;
secsWithZ = seconds < 10 ? "0" + seconds : seconds;
time = minsWithZ + ":" + secsWithZ;
this.tempo_txt.text = time;
if(running){
t= getTimer()-diff-prevDiff;
dt=5000- t;
}else{
diff=getTimer()-currentTime;
}
}
pausa.addEventListener(MouseEvent.MOUSE_UP, menuPause);
voltar.addEventListener(MouseEvent.MOUSE_UP, reset);
function menuPause(e:Event){
running=false;
currentTime=getTimer();
prevDiff+=diff;
}
function menuPlay (e:Event){
running=true;
}
function reset(){
running=true;
prevDiff+=9000;
}
A little explaination on code:
getTimer() returns the miliseconds from when you opened the app and
You can't Pause "getTimer()"
but you can get the time that game is paused and subtract from getTimer().
variable "diff" does that here.
and "currentTime" is when you paused the game.
Andre's answer is more easy;
my answer is more accurate.
because getTimer() returns real miliseconds but timer is not ticking exactly accurate.ENTER_FRAME event and setInterval are also same as timer.
that means if you want a more simple code, use Andre's and if you want an accurate Timer, use Mine.
and removing eventListener (3vilguy's answer) is not enough
because getTimer won't Pause !
I hope my answer be useful.

Answer 2

Better using the Timer- Object
var seconds=9;
var t:Timer=new Timer(1000,seconds);
t.addEventListener(TimerEvent.TIMER, updateTimer);
t.addEventListener(TimerEvent.TIMER_COMPLETE, timerCompleteHandler);
updateTimer();
t.start();
function updateTimer(e:TimerEvent=null){
var t:uint = t.currentCount;
var dt:uint = seconds - t;
var totseconds:uint = dt;
var minutes:uint = Math.floor(totseconds/60);
var sec:uint = Math.floor(totseconds%60);
var minsWithZ = minutes < 10 ? "0" + minutes : minutes;
var secsWithZ = sec < 10 ? "0" + sec : sec;
var time = minsWithZ + ":" + secsWithZ;
this.tempo_txt.text = time;
}
function timerCompleteHandler(e:TimerEvent):void{
trace("Timer complete");
}
pausa.addEventListener(MouseEvent.MOUSE_UP, menuPause);
function menuPause(e:MouseEvent){
t.stop();
voltar.addEventListener(MouseEvent.MOUSE_UP, play);
}
function play (e:MouseEvent){
t.start();
}
Greetings