Actionscript 3 Control Timeline after Duration of no input from user - actionscript-3

can anyone help me with this. I know its something very basic, but I just cant work it out.
What I need is for the timeline gotoandstop at frame 1 after 15 seconds of inactivity.
Basically this is for a directory board so if no one is using it, it will return back to the home screen after a period of inactivity.
Any help would be greatly appreciated.
Thankyou

What you can do, is use a Timer object. Then, whenever the user moves the mouse or clicks or presses a key, reset that timer back to 15 seconds.
On your frame 1, make a timer object:
//create the timer object var
var resetTimer:Timer;
//if it doesn't exist yet, create a new timer object and assign it to that var
if(!resetTimer){
resetTimer = new Timer(15000,1); //tick 1 time with a delay of 15
//listen for the TIMER event (fires when the delay is up)
resetTimer.addEventListener(TimerEvent.TIMER, reset);seconds
}else{
resetTimer.reset(); //if it did previously exist, stop/reset it (for when you revisit frame 1)
}
//go back to the first frame if the timer fires
function reset(e:Event = null):void {
resetTimer.reset(); //reset the timer
gotoAndStop(1); //go to frame 1
}
//LISTEN for various user input type events on stage (globally)
stage.addEventListener(MouseEvent.MOUSE_DOWN, userInput);
stage.addEventListener(MouseEvent.MOUSE_MOVE, userInput);
stage.addEventListener(KeyboardEvent.KEY_DOWN, userInput);
stage.addEventListener(KeyboardEvent.KEY_UP, userInput);
//if there was user input, reset the timer and start it again
function userInput(e:Event = null):void {
resetTimer.reset();
resetTimer.start();
}
The only thing left to do is, when you leave frame 1 and want the timeout to be applicable call resetTimer.start(). Presumably that would be on frame 2.

its possible to simulate it so:
class test extends MovieClip{
public var myTimer:Number;
public var input:TextField;
function test(){
myTimer=0;
input=new TextField();
this.addChild(input);
this.addEventListener(Event.ENTER_FRAME,timer);
input.addEventListener(Event.CHANGE, input_from_user);
}
function timer(ev){
myTimer +=(1/25);//if the frame rate is 25 frame per sconde
if(myTimer ==15){
this.gotoAndStop(1);
this.removeEventListener(Event.ENTER_FRAME,timer);
}
}
function input_from_user(ev){
myTimer =0;
}
}

Related

AS3 addChild after set time

For a game we are creating we need to have a movieclip 'pop up' after a certain amount of time, usually somewhere between 10 and 20 seconds. If this movieclip appears, the timer needs to be paused while the movieclip is active and the timer needs to be restarted after the movieclip disappears. Anyone knows how to do this?
import flash.utils.setTimeout;
// Your Sprite / MovieClip
var clip:MovieClip;
// The time until you want to add the first one
var timeToAdd:uint = Math.random() * 20;
// This will be the timer
var _timer:uint;
// This will add us to the stage after the random time. Second variable is seconds, so we need to multiply by 1000.
_timer = setTimeout(addToStage, timeToAdd * 1000);
// Called when the timer expires
function addToStage():void{
clip = new MovieClip();
// You would need logic to decide when to remove it, but once it is removed this will fire
clip.addEventListener(Event.REMOVED_FROM_STAGE, onRemove);
}
// Called once removed
function onRemove(e:Event):void{
// Remove the event listener
clip.removeEventListener(Event.REMOVED_FROM_STAGE, onRemove);
// Restart the timer
timeToAdd = Math.random() * 20;
_timer = setTimeout(addToStage, timeToAdd * 1000);
}
The above code will add yout sprite to the stage once within 0.001 - 20 seconds. You'd need to add a bit of code to remove your sprite (removeChild(clip)).

Timer AI not working

var moveTimer:Timer = new Timer(1);
moveTimer.addEventListener(TimerEvent.TIMER, timerListener);
function timerListener (e:TimerEvent):void
{
//code
}
moveTimer.start();
moveTimer.addEventListener(TimerEvent.TIMER_COMPLETE, timerDone)
function timerDone(e:TimerEvent):void
{
upKey = false;
}
Hey Guys, so this is my code. I have some very simplistic AI in my game and I'm trying to utilize a timer in order for the enemy to move forward for about 2-3 seconds and then stop. To do this I'm using the variable upKey as a boolean which is set to true, but when the timer finishes it gets set to false and upon it being set to false, there is an if statement that will reduce the enemy's speed to 0.
This is my first time using a timer and the enemies dont really stop... they kind of just keep going until they wander off the screen. Am I doing this correctly or is it a problem elsewhere in my code? Also, is there a better more effiecient way to use a timer?
Thanks, James.
From the code you cite, the timer constructor does not specify repeatCount indicating it should repeat indefinitely. For the timerDone() handler to be called, you must specify a repeat count.
Also, note that a delay below 20-milliseconds is not recommended.
Timer constructor parameters: Timer(delay:Number, repeatCount:int = 0)
delay:Number — The delay between timer events, in milliseconds. A
delay lower than 20 milliseconds is not recommended. Timer frequency
is limited to 60 frames per second, meaning a delay lower than 16.6
milliseconds causes runtime problems.
repeatCount:int (default = 0) — Specifies the number of repetitions.
If zero, the timer repeats indefinitely, up to a maximum of 24.86 days
(int.MAX_VALUE + 1). If nonzero, the timer runs the specified number
of times and then stops.
Timers are not recommended for animated content. Instead, use Event.ENTER_FRAME to manipulate frame-based animation.
One approach would be to use timers to trigger state changes to your game model:
/** timer */
var timer:Timer;
/** whether enemies are advancing */
var advance:Boolean = false;
// start timer at 5-seconds intervals
timer = new Timer(5000);
timer.addEventListener(TimerEvent.TIMER, timerHandler);
timer.start();
// animation controlled by Event.ENTER_FRAME
addEventListener(Event.ENTER_FRAME, frameHandler);
In your timer handler, you can adjust the timer delay depending on the state of your game.
/** timer handler */
function timerHandler(event:TimerEvent):void
{
// stop the current timer
timer.stop();
// depending on the current enemy state
switch (advance)
{
// if true, stop advancing and wait 5-seconds
case true:
trace("Stop advancing, wait 5-seconds");
timer.delay = 5000;
break;
// if false, advance for 2-seconds
case false:
trace("Advance for next 2-seconds");
timer.delay = 2000;
break;
}
// invert advance state.
advance = !advance;
// restart timer
timer.start();
}
Likewise on enter frame, control animation of your enemy based on game state:
/** frame handler, advancing enemy if 'advance' is true */
function frameHandler(event:Event):void
{
if (advance) { /** move enemy forward */ }
}
This alternates state of your enemies, outputting:
Advance for next 2-seconds
Stop advancing, wait 5-seconds
Advance for next 2-seconds
Stop advancing, wait 5-seconds
Advance for next 2-seconds

AS3 - MouseEvent.CLICK fires off for mouse click that happened before the listener was added

I'm new to AS3 and have made a simple "asteroids" game with a game over screen and a resetButton that lets the user play again. When the user clicks on the reset button, the game over screen and the reset button are removed from the stage, and the game proper is added to the stage, along with eventListeners. One of these is a MouseEvent.CLICK listener added to the stage, which calls a fireBullet function. This function draws a bullet and adds it to the stage (other parts of the code then make the bullet move on the screen).
The issue that I am having is that when the user clicks on the reset button, the gameover screen is removed correctly, and the game proper (player, asteroids, eventListeners) are added to the stage correctly, but also at the same time a bullet fires even though the user has not clicked after clicking on the reset button.
My gameOver() function is like this:
stage.removeChild() all objects
stage.removeEventListener() all listeners
null out all objects
draw and add to the stage the game over text and resetButton
addEventListener(MouseEvent.CLICK, onReset) to the resetButton
Then, the onReset() function looks like this:
stage.removeChild() the gameover text and the resetButton
call gameStart();
The gameStart() function looks like this:
initialize variables
draw and add player and asteroids on the screen
add eventListeners including MouseEvent.Click, fireBullet
I've added traces at each function to see what's going on, and this is the flow:
added fireBullet listener //this is gameStart() function being called from Main() and adding everything to the stage the first time
fired bullet //shooting at the asteroids
fired bullet
fired bullet
fireBullet listener should have been removed //this is gameOver() being called that removes everything from the stage and adds the resetButton
clicked on reset
added fireBullet listener //gameStart() being called again from onReset() function
fired bullet //I did not click a second time after clicking on reset
I've read somewhere that events are dispatched all the time regardless if any listeners are actually listening for them, so my suspicion is that my MouseEvent.CLICK listener is picking up the mouse button click from the time when the reset button is clicked, even though this listener is added to the stage afterwards.
I don't have enough experience with AS3 or programming to figure out if this is really the case and what can I do to make sure that the MouseEvent.CLICK listener does not respond to any clicks that happened before it was added to the stage, so any help with this would be greatly appreciated.
====
EDIT
I was assuming I had a logic problem or didn't know something about AS3 and flash, so I just used pseudo code above. Below is a link to the full .as file including the generated .swf
And below that are the relevant functions in full
https://www.dropbox.com/sh/a4rlasq8o0taw82/wP3rB6KPKS
private function startGame():void this is called from Main
{
//initialize variables
bulletArray = [];
cleanupBullets = [];
bulletSpeed = 10;
score = 0;
asteroid1Speed = 0;
asteroid2Speed = 0;
asteroid3Speed = 0;
asteroid4Speed = 0;
//draw player and asteroids
ship = drawPlayer();
asteroid1 = drawAsteroid();
asteroid2 = drawAsteroid();
asteroid3 = drawAsteroid();
asteroid4 = drawAsteroid();
//embarrasing and inefficient code to get random number between -5 and 5 without a 0
asteroid1Speed = Math.ceil(Math.random() * 10 -5);
if (asteroid1Speed == 0)
asteroid1Speed = returnNonZero(asteroid1Speed);
asteroid2Speed = Math.ceil(Math.random() * 10 -5);
if (asteroid2Speed == 0)
asteroid2Speed = returnNonZero(asteroid2Speed);
asteroid3Speed = Math.ceil(Math.random() * 10 -5);
if (asteroid3Speed == 0)
asteroid3Speed = returnNonZero(asteroid3Speed);
asteroid4Speed = Math.ceil(Math.random() * 10 -5);
if (asteroid4Speed == 0)
asteroid4Speed = returnNonZero(asteroid4Speed);
//trace(asteroid1Speed, asteroid2Speed, asteroid3Speed, asteroid4Speed);
//add asteroids to stage
stage.addChild(asteroid1);
stage.addChild(asteroid2);
stage.addChild(asteroid3);
stage.addChild(asteroid4);
//position player and add to stage
ship.x = 40;
ship.y = 40;
stage.addChild(ship);
//add event listeners
stage.addEventListener(Event.ENTER_FRAME, onFrame);
stage.addEventListener(MouseEvent.CLICK, fireBullet);
trace("added fireBullet listener");
}
private function gameOver():void this is called from an onFrame(called every frame) function that I am not including (it's too big and not exactly relevant). it's called when all asteroids are removed.
{
//remove any remaining bullets off the screen
for each (var item:Sprite in bulletArray)
{
stage.removeChild(item);
}
//null out objects and remove listeners
bulletArray = null;
stage.removeEventListener(Event.ENTER_FRAME, onFrame);
stage.removeEventListener(MouseEvent.CLICK, fireBullet);
//check if the listener has actually been removed
if (!(stage.hasEventListener(MouseEvent.CLICK))) {
trace("fireBullet listener should have been removed");
}
stage.removeChild(ship);
ship = null
//graphic for resetButton
resetButton = new Sprite();
resetButton.graphics.beginFill(0xFFFFFF);
resetButton.graphics.drawRect(0, 0, 100, 50);
resetButton.graphics.endFill();
//position for resetButton
resetButton.x = 250;
resetButton.y = 300;
//text for resetButton
resetTextField = new TextField();
var resetTextFormat:TextFormat = new TextFormat();
resetTextFormat.size = 30;
resetTextFormat.color = 0x000000;
resetTextField.defaultTextFormat = resetTextFormat;
resetTextField.selectable = false;
resetTextField.text = "RESET";
resetButton.addChild(resetTextField);
//add resetButton and listener
stage.addChild(resetButton);
resetButton.addEventListener(MouseEvent.CLICK, onReset);
//gameover text
gameOverTxtField = new TextField();
gameOverFormat = new TextFormat();
gameOverFormat.size = 50;
gameOverFormat.color = 0xFFFFFF;
gameOverFormat.align = "center";
gameOverTxtField.defaultTextFormat = gameOverFormat;
gameOverTxtField.selectable = false;
gameOverTxtField.text = "GAME OVER";
gameOverTxtField.width = 660;
gameOverTxtField.height = 200;
gameOverTxtField.x = -10;
gameOverTxtField.y = 20;
stage.addChild(gameOverTxtField);
}
private function onReset(e:MouseEvent):void
{
trace("clicked on reset");
//remove gameover objects and null them
resetButton.removeEventListener(MouseEvent.CLICK, onReset);
stage.removeChild(gameOverTxtField);
stage.removeChild(resetButton);
resetButton = null;
gameOverTxtField = null;
//restart the game
startGame();
}
What's happening is that MouseEvent.CLICK is a bubbling event. In Flash, events have three phases: the "capture phase", the "at target" phase, and "bubbling phase". You can read about it in this Adobe article.
Your reset button's click event handler happens in the "at target" phase. If you trace out the event's phase in the reset button click handler, it will show that event.phase is 2. Per the docs, 1 = "capture phase", 2 = "at target", 3 = "bubbling phase".
After the reset button click handler does its work, the event then bubbles back up through the display list. Since the stage is at the top of the display list, the click event "bubbles up" to the stage. And by that time, you've started the game again and added the stage's click event handler. So the stage's click handler is also triggered.
You can confirm this by tracing out the value of event.phase in your bulletFired() method:
private function fireBullet(e:MouseEvent):void
{
// most of this time it will trace out 2 for the phase
// except when you click on an asteroid when firing or
// click the reset button
trace("fired bullet, event phase: " + e.eventPhase);
bullet = drawBullet();
bullet.y = ship.y;
bullet.x = ship.x + (ship.width / 2);
bulletArray.push(bullet);
stage.addChild(bullet);
}
To fix the problem, you can stop the event from bubbling in your onReset() method:
private function onReset(e:MouseEvent):void
{
// prevent this event from bubbling
e.stopPropagation();
trace("clicked on reset");
//remove gameover objects and null them
resetButton.removeEventListener(MouseEvent.CLICK, onReset);
stage.removeChild(gameOverTxtField);
stage.removeChild(resetButton);
resetButton = null;
gameOverTxtField = null;
//restart the game
startGame();
}
It sounds to me like the previous iteration of your game has not had the MOUSE.CLICK event listener removed. Even if the game is removed, the MOUSE.CLICK event will continue triggering whatever handler you added to it, eg; addEventListener(MOUSE.ClICK, ). When the game is removed you also need to removeEventListener(MOUSE.CLICK, ).

how to remove a child object by removeChild()?

I'm trying to make a custom animated/shooter, from this tutorial: http://flashadvanced.com/creating-small-shooting-game-as3/
By custom, I mean customized, ie, my own version of it.
In it's actionscript, there's a timer event listener with function: timerHandler()
This function adds and removes child "star" objects on the stage (which the user has to shoot at):
if(starAdded){
removeChild(star);
}
and :
addChild(star);
Code works great, but error occurs on scene 2.
The code works great, and I even added some code while learning via google and stackflow to this flash file. I added Scene 2 to it too, and had it called after 9 seconds of movie time. But when it goes to Scene 2, it still displays the star objects and I've been unable to remove these "star" object(s) from Scene 2.
Here's the code I added:
SCENE 1:
var my_timer = new Timer(5000,0); //in milliseconds
my_timer.addEventListener(TimerEvent.TIMER, catchTimer);
my_timer.start();
var myInt:int = getTimer() * 0.001;
var startTime:int = getTimer();
var currentTime:int = getTimer();
var timeRunning:int = (currentTime - startTime) * 0.001; // this is how many seconds the game has been running.
demo_txt.text = timeRunning.toString();
function catchTimer(e:TimerEvent)
{
gotoAndPlay(1, "Scene 2");
}
SCENE 2:
addEventListener(Event.ENTER_FRAME,myFunction);
function myFunction(event:Event) {
timer.stop();
timer.removeEventListener(TimerEvent.TIMER, timerHandler);
stage.removeChild(star);
stage.removeEventListener(MouseEvent.MOUSE_MOVE, cursorMoveHandler);
my_timer.stop(); // you might need to cast this into Timer object
my_timer.removeEventListener(TimerEvent.TIMER, catchTimer);
Mouse.show();
}
stop();
=====================================================
I'm quite new as3, and have just created an account on StackOverflow... even though I've known and read many codes on it since quite some time.
Here's the Edited New Complete Code:
//importing tween classes
import fl.transitions.easing.*;
import fl.transitions.Tween;
//hiding the cursor
Mouse.hide();
//creating a new Star instance
var star:Star = new Star();
var game:Game = new Game();
//creating the timer
var timer:Timer = new Timer(1000);
//we create variables for random X and Y positions
var randomX:Number;
var randomY:Number;
var t:int = 0;
//variable for the alpha tween effect
var tween:Tween;
//we check if a star instance is already added to the stage
var starAdded:Boolean = false;
//we count the points
var points:int = 0;
//adding event handler on mouse move
stage.addEventListener(MouseEvent.MOUSE_MOVE, cursorMoveHandler);
//adding event handler to the timer
timer.addEventListener(TimerEvent.TIMER, timerHandler);
//starting the timer
timer.start();
addChild(game);
function cursorMoveHandler(e:Event):void{
//sight position matches the mouse position
game.Sight.x = mouseX;
game.Sight.y = mouseY;
}
function timerHandler(e:TimerEvent):void{
//first we need to remove the star from the stage if already added
if(starAdded){
removeChild(star);
}
//positioning the star on a random position
randomX = Math.random()*500;
randomY = Math.random()*300;
star.x = randomX;
star.y = randomY;
//adding the star to the stage
addChild(star);
//changing our boolean value to true
starAdded = true;
//adding a mouse click handler to the star
star.addEventListener(MouseEvent.CLICK, clickHandler);
//animating the star's appearance
tween = new Tween(star, "alpha", Strong.easeOut, 0, 1, 3, true);
t++;
if(t>=5) {
gotoAndPlay(5);
}
}
function clickHandler(e:Event):void{
//when we click/shoot a star we increment the points
points ++;
//showing the result in the text field
points_txt.text = points.toString();
}
And on Frame 5 :
//timer.stop();
//timer.removeEventListener(TimerEvent.TIMER, timerHandler);
// uncomment lines above if "timer" is something you've made
stage.removeChild(star);
stage.removeEventListener(MouseEvent.MOUSE_MOVE, cursorMoveHandler);
timer.stop(); // you might need to cast this into Timer object
timer.removeEventListener(TimerEvent.TIMER, timerHandler);
Mouse.show();
stop();
There's no Scene 2 now, in this new .fla file...
Here's a screenshot of the library property of my flash file...: http://i.imgur.com/d2cPyOx.jpg
You'd better drop scenes altogether, they are pretty much deprecated in AS3. Instead, use Game object that contains all the cursor, stars and other stuff that's inside the game, and instead of going with gotoAndPlay() do removeChild(game); addChild(scoreboard); where "scoreboard" is another container class that will display your score.
Regarding your code, you stop having a valid handle to stage that actually contains that star of yours, because your have changed the scene. So do all of this before calling gotoAndPlay() in your catchTimer function.
function catchTimer(e:TimerEvent)
{
//timer.stop();
//timer.removeEventListener(TimerEvent.TIMER, timerHandler);
// uncomment lines above if "timer" is something you've made
stage.removeChild(star);
stage.removeEventListener(MouseEvent.MOUSE_MOVE, cursorMoveHandler);
my_timer.stop(); // you might need to cast this into Timer object
my_timer.removeEventListener(TimerEvent.TIMER, catchTimer);
Mouse.show();
gotoAndPlay(1, "Scene 2");
}
And the code for Scene 2 will consist of a single stop() - until you'll add something there. Also, there should be no event listeners, especially enter-frame, without a code to remove that listener! You add an enter-frame listener on Scene 2 and never remove it, while you need that code to only run once.
Use getChildAt.
function catchTimer(e:TimerEvent)
{
var childCount:int = this.numChildren - 1;
var i:int;
var tempObj:DisplayObject;
for (i = 0; i < childCount; i++)
{
tempObj = this.getChildAt(i);
this.removeChild(tempObj);
}
gotoAndPlay(1, "Scene 2");
}
This will remove all the children you added on scene 1 before going to scene 2.

How can we reset the repeatCount property while the timer is running

How can we reset the repeatCount property while the timer is running.
In a game a countdown timer starts running at 120. If the user clicks on "hint" button i need to reduce the time by 5 seconds and start displaying the countdown
Now the problem is the countdown timer is reduced by five but the Timer runs till "-n*5".
"n" being the number of times hint button clicked.
How to solve this issue?
Here's one approach to your problem. Maintain a timer count separate from the Timer's repeatCount, and stop when that separate counter hits 0, instead of when the TimerComplete event occurs.
public var t:Timer;
public var count:int = 120;
protected function init(event:FlexEvent):void
{
t = new Timer(1000,count);
t.addEventListener(TimerEvent.TIMER, onTimer);
t.start();
}
protected function onTimer(evt:TimerEvent):void
{
count--;
//display count as time remaining
if (count <= 0)
{
//out of time!
t.stop();
}
}
protected function onHint(evt:MouseEvent):void
{
count-=5;
//update time or wait for next tick
}