ActionScript 3.0 :: Error Removing Child And Event Listener?
Jan 28, 2011
I'm trying to build a small game to try and get into ActionScript. This is my first real attempt at ActionScript.Currently I have an Enemy superclass and an Enemy_One class that extends that superclass.When an enemy has moved off screen I want to remove it from the frame. Here's the errors I'm getting:
Code:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at Enemy/checkHitPlayer()
at Enemy/loop()
Enemy.as
[code].....
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Feb 19, 2010
public function GlobalSolutions()
{
Navigation(' Home ', 'index', 235, 0x97F9EC);
Navigation(' Office Supplies ', 'Office_Supplies', 295, 0x97F9EC);
[code]....
I want to remove the appropriate child (e.currentTarget) and create a new child in its place with the next line, but it doesn't work. What do?
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Dec 23, 2009
In the following code...
Code:
function makeTheCall(){
var _loader:URLLoader = new URLLoader();
_loader.addEventListener(Event.COMPLETE, handleOnComplete, false, 0, true);
[code]....
...how would I remove the listener?
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Feb 4, 2009
this is the error I am having:
TypeError: Error #2007: Parameter listener must be non-null.at flash.events::EventDispatcher/removeEventListener()
at project1_fla::MainTimeline/btnName()
here is my code:
ActionScript Code:
import caurina.transitions.Tweener;
import caurina.transitions.properties.ColorShortcuts;[code]..........
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Jul 30, 2009
I have these buttons in a movie clip and I would like to have only one event listener for the parent, using event.target to point to the children. I have also tried event.currentTarget, and it didn't work.here is the code that works:
test01.abtn.addEventListener(MouseEvent.ROLL_OVER, mouseHandler);
test01.bbtn.addEventListener(MouseEvent.ROLL_OVER, mouseHandler);
test01.cbtn.addEventListener(MouseEvent.ROLL_OVER, mouseHandler);[code]....
It is only targeting the movie clip, not the buttons inside the movie clip.
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Mar 15, 2010
I am working on a game for my university project and I have run into a bit of trouble. I have the following code here:
function launchBall() {
this.stage.addEventListener(KeyboardEvent.KEY_DOWN ,launchBallHandler);
function launchBallHandler(e:KeyboardEvent):void {
if (e.keyCode==32) {
[Code].....
Its set up so that when a ball goes off screen, it resets to a coordinate and launchBall is called.
LaunchBall then adds the event listener to see when the Space key is pressed and that starts the ball moving again. The problem I have now is I cant seem to get rid of that eventListener. I have tried removeEventListener and that doesn't seem to work. I have tried:
if (ball.xVel>0 && ball.yVel>0) {
removeEventListener(KeyboardEvent.KEY_DOWN,launchB allHandler);
just below that code and that doesn't work either. It's not spitting any errors out at me but I am completely stumped.
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Dec 7, 2009
I'm trying to build a scrolling thumbnails from scratch for my first time and i can get the thumbs to scroll when the mouse rolls over the scroll arrow, but i can't get it to stop scrolling once the mouse rolls out.
leftscroll_mc.addEventListener(MouseEvent.ROLL_OVER, scrollLeft);
function scrollLeft(e:MouseEvent):void {
addEventListener(Event.ENTER_FRAME, goLeft);
[Code]....
I've tried moving the entire roll_out function all over the place but I would get errors not being able to find lremoveFast but either way I can't get it to funciton
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Feb 18, 2011
Iīd like to know if itīs necessary to remove event listeners from buttons. I know it's good practice to remove event listeners when its use is over. But itīs necessary to remove event listeners for buttons as well?
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Mar 20, 2012
i have a movie clip named "contact" inside this movie clip made the same object into a 2nd imbedded movie clip named "em_contact" inside this I did a frame by frame animation and added a new movie clip symbol of a piece of paper named contactbtn_mc on this frame, I added an event listener for a click that acesses on the root level a symbol named contact_mc i told it to go to and play frame 2 that plays out an animation of this object moving into the screen.
my problem here is i asked earlyer on how to stop the em_contact to stop listening for the mouse click once it is clicked. I made the code it come up with no errors but it does not stop the event listener the event listener is still there bellow is my code.
import fl.transitions.Tween;
import fl.transitions.easing.*;
import fl.transitions.TweenEvent;
import flash.events.MouseEvent;
[code]....
what i want to happen here is for the event listener once it is click to stop listening for that event becuase i have a mouse event inside the "em_contact" movie clip on an object named "contactbtn_mc". and that one has a click event on it as well but when i click on the contactbtn_mc the animation above plays out as well.
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Apr 4, 2011
I'm having trouble removing the an event listener as well as the sprite at the same time. I currently get an error:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
And if I comment out removeChild, I have no error but, obviously, the sprite remains on the screen. how I can rid myself of that error?
//Bullet extends Sprite Class
bullet:Bullet = new Bullet();
mc.addChild(bullet);
[Code]....
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Feb 10, 2011
I've dynamically created event listeners in the usual sort of way:
Code:
myText.addEventListener(MouseEvent.MOUSE_OVER, hover(nameLabel));
function hover(nameLabel):Function
{
[Code].....
The problem is how to remove the event listener later in the program as the usual code isn't working. I'm guessing I should have done this in a class but I'd like to understand this problem better.
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Apr 9, 2011
I am trying to do is to add an eventListener to a MovieClip that is inside another MovieClip. Things are going like this:I have ParentMovieClip and inside ChildMovieClip. When I load ParentMovieClip I would like to add an EventListener to ChildMovieClip so that when I roll over the mouse on the ChildMovieClip it will play some scenes from the ParentMovieClip.
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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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Oct 6, 2010
Have a rather bizarre issue with Flex throwing an error when teh application is running in the background. I use Selenium and SeleniumFlexApi to run various tests against my app. If the browser window is in the foreground or any part of it is visible to teh screen, the test pass as expected. However, if the window is in the background and not visible, I am getting the following error in 1 part of my app.
ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller. I have a VBOX that creates a number of children and then upon creationComplete(or UpdateComplete, I've tried both) it then needs to remove any of the children that are not visible. Each child has a listener for CreationComplete which checks if the child is visible and if not, adds it to an array which is iterated over when the parent UpdateComplete is fired. I cant seem to find any reason for this behavior and am curious if its an issue with the Flex Component LifeCycle.
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Feb 15, 2012
I am occasionally getting flash popup this error:
Error #2044: Unhandled error:. text= my code is here:
[Code]...
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Apr 12, 2012
I have made index swf which is loading other child swf's into index these swf's are images.swf,portfolio.swf, about.swf etc.., I have made 2 public function in each swf which is construct or diconstruct. when i unload any swf then i play disconstruct public function of every child swf.. I stuck in when I remove stage event listener of every child swf then it shows error.
[Code]...
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Nov 21, 2009
What is the correct event listener to detect a child added to the stage? I tried:
[Code]...
which doesn't work. I also tried ADDED_TO_STAGE but that doesn't fire it either. Do you know the correct way to detect when the child is added? Perhaps I should be attaching the listener to the parent instead?
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Jul 21, 2009
"TypeError: Error #2007: Parameter child must be non-null.
at flash.display:isplayObjectContainer/addChild()
at newLFXsite_fla::MainTimeline/onClick()"
so i get this error every time i click on the about page after the homepage appears on screen, from what i know im doing everything right, but i guess theres something wrong that i cant see.
[Code]...
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Apr 7, 2009
I'm having an issue with MOUSE_OUT triggering before MOUSE_OVER has a chance. I have a global mouse listener class that listens to every mouse event and sends the object involved a message telling it when a mouse event has happened. When a Menu object is opened it adds a bunch of children and when it's closed it removes them all. The problem comes when moving the mouse from the Menu to the Children, Menu receives a MOUSE_OUT event and closes before the Child receives a MOUSE_OVER.
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Mar 13, 2011
I have created event listeners for a particular movieclip.Insidet this movieclip there is so many objects.When ever I click on the parent movieclip the event listener calls the function for the child object. I had tried removeEventLIstener()
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.MouseEvent;
var info:MovieClip=new MovieClip();
info.graphics.beginFill(0x000000,0.35);
[Code] .....
I want to delete mc's parent
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Jan 31, 2011
I'm getting this error on a pretty simple presentation, AS3, CS5.TypeError: Error #1009: Cannot access a property or method of a null object reference.at paperstartover_fla::MainTimeline/playout()Situation:I have a hidden button which goes to and plays "out" on MOUSE_OUT(the function to do this is called playout)that works fineBUT...I then added a CLICK event listener to the hidden button, function being gotoAndPlay ("start")When the button is clicked, the error occurs. The timeline goes to the right frame but stops dead.I was thinking this could be because Flash thinks it should be doing the playout animation at the same time?
btninvis1.addEventListener(MouseEvent.MOUSE_OVER,p layover)
function playover (event:MouseEvent):void{
btnpaper1.gotoAndPlay("over");}
[code].....
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Dec 27, 2011
I am trying to make an animation with three seperate buttons that when clicked on make one set of text disappear and new text appear in its place. My code so far looks like this:
stop();
//---Bio Button Text---\
go.addEventListener (MouseEvent.CLCIK, bioplay);
[Code].....
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Jul 31, 2009
When i try to add an event listener in a class it keeps producing 1046 error - Type was not found or was not a compile type constant
Code:
package {
import flash.display.Shape;
import flash.display.Sprite;
[code].....
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Nov 10, 2011
Im getting an error whilst trying to add an event listener to a class of a Button on my stage.
1061: Call to a possibly undefined method addEventListener through a reference with static type Class.
On my stage i have a Button with the instance name stopBtn, this is also exported to an actionscript class called classes.stopBtn (stopBtn.as in a folder called 'classes'). The button is on the first keyframe in the main timeline, in a layer with other buttons on that layer
[Code]...
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Apr 15, 2008
I'm having trouble with buttons. I've tried two sets of code and get the same result: an "1120: Access of undefined property enter_btn" error. Here are the two sets of code I am using:
Code:
function onEnterClick(evt:MouseEvent):void {
gotoAndPlay(71);
}
[code]....
I've set the instance name for the button but keep getting the error. Do I need to set up a variable first?
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May 12, 2010
I have created 2 sprites each containing a dynamic text field child. I then add this as a child of the stage. (I have done this in order to make the text clickable with a hand cursor on mouseover)It loads in fine, I just run into problems when trying to REMOVE it the sprite containing the text."ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller."Sections concerned in red:
Code:
import fl.transitions.Tween;
import fl.transitions.easing.*;
[code]........
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Jul 7, 2011
I am trying to learn JavaScript and I am wondering whether JavaScript has a event listener just like ActionScript's ENTER_FRAME. Basically, I want this event listener to listen "all the time" not just wait for any particular instance (mouse click, keyboard event) of event.
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Sep 29, 2010
i have this function to enable the enter key
Code:
stage.addEventListener(KeyboardEvent.KEY_DOWN, KeyDownFunc);
function KeyDownFunc(event){
if(event.keyCode == Keyboard.ENTER){
[Code].....
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Nov 17, 2011
if I have an event listerner (mouse, keyboard, enterframe,....event) that is being triggered, and when it finishes its event, something that is able to detect the finished event listener and fire out another sets of event.
It works more like MOTION_FINISH in TweenEvent, but it is only available for TweenEvent only, what if I want to detect a mousclick, keyboard, enterframe or even touch event?
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Feb 23, 2011
My stage has about 25 buttons on it. Each button when pressed to tweens the background to some random x/y coordinates and then loads an external swf file.This is all working, but the timing is off. How can I wait for the initial background tween to end before I make the loader call to the .swf file.Currently each button's behavior is called on the MouseEvent.CLICK event which calls a function that knows its unique filename.swf. I know you can add the MOTION_FINISH even to the tween event but then I would have to call a new function and lose track of the button that initially called it.
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