ActionScript 3.0 :: Removing Event Listeners From Movieclips In Class
Mar 21, 2011
I'm creating a class for a game, and I'm having a problem removing event listeners from movieclips in that class.In the class file I have an enterFrame event which puts the movieclips into motion - I want to remove that event listener when the movieclip is removed from the stage.I made the function 'public' in the class file and tried to target it as follows (animal is the movieclip)animal.removeEventListener(Event.ENTER_FRAME, animal.onEnterFrameHandler)
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Jan 21, 2009
I've created a drop down list and populated it with dynamic buttons. (I made a DropDown_btn class with a dynamic text field in it and then filled the button text from an xml file). On rollover I tint the button blue and then set the tint back to black on rollout. When you click on the button I'd like it to stay blue until a different button is clicked.
I thought on CLICK I'd run a function like this:
ActionScript Code:
function removeRollover(evt:MouseEvent):void {
evt.target.transform.colorTransform=c;
evt.target.removeEventListener(MouseEvent.ROLL_OUT, btnOut);
evt.target.removeEventListener(MouseEvent.ROLL_OVER, btnOver);
}
...and then I need to addEventListeners back to any button that doesn't have them and set that button back to black. I could do this by looping through an array of the buttons but I can't figure out how to access them as objects.
I also gave them each a property of "buttonValue" when I loaded them so I can access event.currentTarget.buttonValue (which in this case is a number from 1-5) but once again I can't figure out how I might leverage this information.
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Nov 24, 2011
I have this in my constructor:
[Code]..
The problem is I get Error: Error #2094: Event dispatch recursion overflow. Why does removechild keep getting called if this.parent does not exist? Why doesn't removing event listeners work?
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Dec 16, 2009
If you have multiple event listeners running, is there any way to remove all of them at once rather than one at a time?
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Dec 17, 2010
I have a basic question about manually removing event listeners in actionscript 3.If I have a function like:
private function doStuff(event : Event):void
{
//let them save
var f:FileReference = new FileReference();
[code]...
How do I remove the event listeners when the saveDone function is called? Normally I just change the "add" to "remove" like:
f.removeEventListener(Event.COMPLETE,saveDone);
However, f is a local variable, and I can't get to it after the doStuff function ends.
private function saveDone(ev:Event){
f.removeEventListener(Event.COMPLETE,saveDone);
}
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Jul 1, 2010
I'm trying to do something that I'm not sure if it's possible. I have to add or remove multiple listeners that will trigger the same three methods (onComplete, onError and showProgress). I was trying to do something like this:
[Code]...
Is there anyway to solve this? It seems that after passing through the addListeners method, the loader instance gets lost.
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May 14, 2009
I was just wondering--and it's probably an obvious question really--if I make an object null and that object had one or more event listeners registered, are the listeners removed?
for example:
Actionscript Code:
object.addEventListener(Event.SOME_EVENT,callBack);
function callBack(evt:Event):void
{
object = null;
[Code].....
In this case have I removed 'object''s listener when I made the object null?
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Apr 21, 2011
ive made a flash website containing 5 pages all accessed via flash buttonson one of the page ive tried loading a external swf file and then added event listeners to each of the buttons so when a new page is selected the swf file doesnt continue to play in the background on the other pagesthis works, however when i then try to change page again this error is displayed:ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.at flash.display:isplayObjectContainer/removeChild()atValleyViewingWebsite_fla::MainTimeline/btnClick()below is the code im using:
var Xpos:Number = 110;
var Ypos:Number = 170;
var swf:MovieClip;
[code].....
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Nov 9, 2003
What is the correct way to refer to the dispatcher listeners in the following code so that I can remove them within completeListener()?
Code:
private function createLoader():void {
// Create the Loader
[code]....
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Mar 15, 2012
I have l modded some code that I am really happy with, it makes buttons bounce around for the user to try to click on when entering a certain frame.. I notice tha the code adds eventlisteners ENTER_FRAME to make this work, when you leave that frame there are now problems with null objects becuase the listeners are still on but the objects are not there anymore..
Ok so attempted solution - I can use a currentLabel on the main timeline to check if the correct frame is reached then use a function if (label is x) put listeners on else take them off... works but then I have to have these objects hidden on the timeline and then add visible=true/false to my framelabel listener.. This works but part of my functionality here is that these movieclips that move are buttons that the user clicks on and they explode and dissapear- but now they dont because I have a code that says on that frame they should be visible..
The only thing I can think of is to have a blank frame at the end of the explode and put a stop on it. Then add a gotoAndPlay(1) into my frame label code. Seems very ugly, you guys got a better way? Can I remove eventlisteners on leaving a frame? Is there a code like LEAVE_FRAME??
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Feb 15, 2011
Do you have to remove event listeners on variables with local scope? By this I mean...does the event listener still exist if the variable only exists as long as the function/method is running?
private function startSomething():void
{
whatever.start();
[Code].....
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Aug 18, 2011
I add an instance of this module to the dispay list and then remove it.Will the event listener attached to foo create a leak?A simplified module:
<s:Module creationComplete="init()">
<fx:Script>
protected var foo:Bar = new Bar();
[code].....
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Feb 6, 2009
I'm adding and removing stage event listeners I am relatively new to AS 3 and have been building a liquid layout site unfortunately I do not have a strong grasp of classes and have been doing all of my scripting on the main timeline with encapsulated script within MC's.
basically I am calling on the same functions over and over and those are mostly resize functions which I have added StageEventListeners on the appropriate frames to listen for resize events on that stage now as of now I have literally dozens of these scattered about the site. when testing my site things are running fairly smoothly however I keep getting error messages in my output window that go a little something like this.
[Code]...
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Jan 19, 2011
I'm trying to develop a catching game, just for a bit of fun and learning experience. I've been bouncing between tutorials and I've finally come to a point where I can't get any further. After you catch three sandwhiches, you lose and it takes you to an end screen, however, I'm unable to stop the listeners from being called, and when the game restarts, the food falls, but you're no longer able to catch it or keep score.
[Code]....
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Oct 12, 2011
I want to make a static function that I can use in all the custom classes.It should be some kill(); function that would remove the object from the stage as well as removing its event listeners. I made it in Document class, and it didn't work. Here's the code:
ActionScript Code:
public static function kill(e:DisplayObject)
{[code].....
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Sep 3, 2009
Can event listeners only be added to the class which dispatched the event? I ask because I want to have the logic for the listener on the main class, and the action is dispatched on click from a thumb which is instantiated in a scroller class. Kinda like this:
ActionScript Code:
pseudo code:
class main {
main() {
[code]....
This doesn't work. Why can't the main class listen for an event on the thumb class?
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Dec 2, 2005
I have two movie clips. The child movieclip is a button with rollover events which is nested inside the parent. I would like the parent to also have rollover events, but I understand that this is not possible in flash. I am familiar with two workarounds: event bubbling/delegation and the event listeners.
[Code]....
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Aug 2, 2007
Flash CS3, actionscript 2.0. I have a timeline animation that I am trying to convert to actionscript. Basically there are 8 movieclips that I have added to the timeline that fade in at different times. I have the code for each of the tweens figured out
(var laugh:Tween = new Tween(laugh_mc, "_alpha", Strong.easeIn, 0, 100, 17, false)
But I need one to start one, then when its finished, go to the next one without using go to and play.
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Apr 20, 2009
I have a button that is a movie clip that is set up with animations triggered with MOUSE_OVER and MOUSE_OUT event listeners. The glitch is that once the mouse is over the button ... each ensuing pixel that the mouse is moved, loops the animation again. That probably didn't make a whole lot of sense, so I posted the file on my test site [URL]. You have to drag your mouse slowly across the button to see this. The bottom part of the button works as I'd expect. When you roll over the text at the bottom of the button, everything functions as it should. The looping problem starts when you roll over the image portion of the button. For some reason it considers each consecutive pixel rolled over to be a new event and consequently triggers the "over" animation again.
The code I have is below. I've commented out the MOUSE_OUT function for now. There is also a screenshot at the above link of my Layers palette for the button clip in question. I put a "stop" label at each frame that has an action so you see the actions used.
oneBedButton_mc.buttonMode = true;
oneBedButton_mc.addEventListener(MouseEvent.MOUSE_OVER, overEffect);
//oneBedButton_mc.addEventListener(MouseEvent.MOUSE_OUT, outEffect);
function overEffect (e:MouseEvent) {
oneBedButton_mc.gotoAndPlay("over");}
function outEffect (e:MouseEvent) {
oneBedButton_mc.gotoAndPlay("out");}
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Dec 8, 2009
I have done this same thing in ActionScript 3, but am not familiar with ActionScript 2, which I am forced to use for this project. I am loading products into a SWF via XML and attempting to add a click event to each dynamically-created movieclip. Simply tracing the text from a node in XML will do for now. I'd like to assign a property called "desc" or "description" to each movieclip and have it trace that property's value when clicked. Here is the relevant portion of my code as it stands:
Code: Select allvar iXML:XML = new XML();
iXML.ignoreWhite = true;
iXML.onLoad = init;
iXML.load("http://localhost:8888/products.php?p=Shortboards");
[Code].....
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Jan 31, 2010
I'd like to add event listeners to movieclips (already on the stage), whose names are called from an array one by one, into a for loop.
Code:
// there are 4 movielcips on the stage with name a1 - a4.
// create array
var Bro:Array = ["a1","a2","a3","a4"];
// for loop
for ( var i:Number = 0; i < 4; i++) {
// Add event listener to array values to buttons.
Bro[i].addEventListener(MouseEvent.ROLL_OVER, roll, false, 0, true);
//execute this function on rollover
function roll() {
trace("why wont my arrays work in for loops");
}}
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Feb 20, 2009
I have a loop which creates a bunch of movieclips and sets them on the stage.As I create each one I attatch an eventListener to it.My problem is that when the eventListener fires, the function it calls always works on the first mc added to the stage, not the one that fired the listener.How do I fix this?Here's a bit of the code:
Code: Select allfor (var i:int=0;i<numOfItems;i++) {
item = new Item();
//etc etc[code].....
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Aug 4, 2009
I have many buttons in Main.mxml. I'm trying to move the button functionality into a Class and have Event Listeners inside the class respond to Click and call other functions. I have written:
Main.mxml
<mx:Button x="23.5" y="10" label="checker" click="{goListen()}" />
<mx:Button id="btnT1" x="252.5" y="10" label="t1" />
[code].....
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May 24, 2011
i am making a simple game i want to be able to add an keyboard event lisnter within the class constructor. However i am having trouble. i undertsand you have to pass the stage through a listed display object property stage? anyway i am getting errors that do not recognise my event listener keyboard event.
package louiseguchi.game
{
import flash.display.Stage;
[Code]....
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Mar 2, 2012
how do I use mouse event listeners outside of my document class. I have the following simplified document class:
public class Main extends Sprite
{
public var realMain:State1 = new State1();
[Code].....
However, this doesn't work in its current state; "State1" isn't outputted. I have seen references to the use of the Event.ADDED_TO_STAGE event, but am not sure if that is what I need to do, or how to use it.
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May 10, 2010
Im am trying to access my event listners in my "menuButn" class from my doc class.
In my main document class i have the following:
Main.as
public function xmlLoaded(event:Event):void {
var menuButn:Class=getDefinitionByName("com.btn.menuBu tn") as Class;
[Code]......
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Mar 1, 2012
I am working on a Flash demo (all AS3) that requires a scrollbar. I wanted to create my own so on searching I found this Kirupa tutorial. I learned it an incorporated everything (also went well beyond) and the end product works nicely. There is one aspect of the code provided in this tutorial that has me very confused and, although my code includes it and everything works, it bugs me to not understand it. It's this part of the Scrollbar class:
[Code]....
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Mar 3, 2012
I want to make a little game. What I need is to add event listeners to all of Tank objects inside the Battlefield instance. I just can seem to figure out how.
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Jun 15, 2011
I came in to flash on ActionScript 3 and when I was starting out just over a year ago I realised how much of a bother finding keyCodes was and changing controls was just as long as had to look up the new one I wanted to use. My solution was to (eventually) write a class that handles all of my key presses and event listeners attached to that stuff. instead of using keyCodes, the functions use strings for their arguments making it easier to see what keys you want to do what. Initially the class only worked for letters and numbers but I managed to make it easily customisable and includes the arrow keys, numpad numbers, space, enter, shift and control keys.
The reason why I wrote this thread was because: I plan on making it a public class (available to anyone who wnats to use it) and b) to see if there were any specific functions that people think may be useful. So far there are the standard key-down and onRelease type functions as well as a function that only returns true once for the duration that a key is down - difference between pressing and holding.
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Mar 3, 2010
I know using the UI loader when I needed to remove from the stage I used
MovieClip(loaderVideoGallery.content).flvPlayer.stop()
this time I need to remove a loader class event loader from the stage[URL]... The scenerio is I have 5 externally loaded .swfs that load on different frames on the timeline. When one is playing and another button event listener is clicked the previous video remains on stage. This happens when I go anywhere else in the timeline so I would think I need (removeChild)
Wouldn't this have to go in every button listener? If I went from a frame that loads an swf to the the frame that displays the homepage where text is in the place of where the swf was I would need to always have the remove Child event in all other button event listeners am I correct?
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