ActionScript 3.0 :: Accessing The Stage Property?
Nov 28, 2011
I am having a problem referring to stage properties, where I am trying to e.g. obtain a third of the width of the stage. My code keeps throwing up the "Cannot access a property or method of a null object reference." I have found a few things from a search online, but haven't been able to work through it yet.
I should also say that I am working in flash and have made a movieclip with a movieclip inside (which is to be used as a roll-over menu for image thumbnails). The instance name of the 'parent' movieclip is "galleryPane"; and mc inside has an instance name "thumbnailsContainer" .Here is my code:
ActionScript Code:
package {
import com.greensock.TweenLite;[code].....
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Apr 23, 2010
How can I access objects and modify their property that is ALREADY placed on the stage using external classes (AS file)? I 'm a newbie of AS3 and followed some tutorials about AS3 not long ago. For I learned scripting in AS3 can be done using AS file rather than script on Timeline. But I have a question. How can I "find" and "modify"the objects on the stage, or inside a MovieClip , in AS3?
For example, I have a file call Stage004.fla which have no document class linkage. I place the MovieClip "StageMain" which links the Stage004.as on the stage. StageMain has a textfield in it named "textFieldStage001". The Stage004.as is ran using "Event.ADDED_TO_STAGE" since StageMain is on the stage. I create another AS file WindowRename , to test can I modify the text in "textFieldStage001".
Then the famous error #1109 occurred.
"1119: Access of possibly undefined property textFieldStage001 through a reference with static type Class."
ActionScript Code:
package {
import flash.display.Stage;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.display.MovieClip;
public class Stage004 extends MovieClip{
[Code] .....
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Jun 11, 2010
I have a document class that is connected to a swf but for some reason I can't access the stage/root property. I can access all instance names that are on stage but trying to access stage will return "null". What's up?
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May 14, 2011
- I have A.fla.
- A.fla includes buttons, movie clips and also B.swf is loaded in A.fla using a LOADER
- i want to access elements in A.fla, from the actionscript codes inside B.fla to modify those movie clips and buttons based on actions going on in B.swf
for instance, lets say there is a button X in A.fla, and there is a button Y in B.fla, B.swf is loaded into A.fla, and I want the button Y to erase button X when clicked.
general question: accessing elements in a stage, through a SWF file loaded into that stage.
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Mar 19, 2010
I would like to rotate the yellow circle mc, w/ it's nested white circle movie clip, and use the drawing API to have a line continuously drawn to the white circle as it moves around.
I'm using the code below. The line gets drawn to a static point, and not to the white circle (smBall) movie clip as I would expect.
[Code]....
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Oct 11, 2010
I am getting the following error when I importmy swf onto my main stage: TypeError: Error #1009: Cannot access a property or method of a null object reference.
at FtScrollBar/set useMouseWheel()
at ButtonsMenu_fla::buttonsScrollingMenu_1/ButtonsMenu_fla::__setProp_sb1_buttonsScrollingMen u_ScrollBarComponent_1()
at ButtonsMenu_fla::buttonsScrollingMenu_1$iinit()[code].....
On it's own the carousel works fine, it's only when I import it that it throws an error, all of the components within the carousel work fine (the images are highlighted on mouse over, the onclick code for the thumbs runs the right functions) it's just the scrolling that doesn't work.I've tried removing the references to stage from the loaded swf but I still get the same errors.I'm fairly new to flash but I'm finding the error messages to be fairly unhelpful at the best of times, I've attached the swf I'm trying to load in in a zip
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Jul 23, 2011
i need some help to understand how to access a property of a child of a DisplayObject. within a class i have an object with the variable name: btnLMain i have assigned it a name property: btnLMain.name = "btnL";
btnLMain also has a property: btnLMain.clickNum = 0; // thats the one i need to access when i instantiate the class (btnL) containing this code in the parent class i need to access the property "clickNum" so i did this:
[Code]...
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Apr 10, 2011
I try access to (MySWF(movieClip)).id but I get a weird message error:
1120: Access of undefined property aslider
Which is defined in MySWF.init. If I remove (MySWF(movieClip)).id program works perfect! Isn't this weird especially as I have added
addEventListener(Event.ADDED_TO_STAGE, init);
in MySWF constructor to ensure that aslider is on the stage.
In main:
private var idMySWF:int;
public function loadMySWF(event:MouseEvent) {
idMySWF = 1;
var myLoader:Loader = new Loader();
myLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, loadComplete);
[Code] .....
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Nov 23, 2011
I have an MXML file with this:
<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" width="100%" height="30">
<mx:Script>
[Code]....
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May 23, 2010
I am writing a program in OOP and I have a custom subclass which I make a new instance of in the document class. When I do make a new instance of this custom class, I want this (the custom subclass is a movieclip) object to be positioned at the center of the stage. However, when I try
ActionScript Code:
this.x = (this.parent.width-this.width)/2;
flash outputs an error saying '1119: Access of possibly undefined property parent through a reference with static type'
How do I access the parent property?
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Apr 20, 2011
I need to create an Array of movieclips so that I'm able to read / modify / add its properties. I thought the best solution was to create an Array of strings with each movieclip's name and then using this to convert the string to an expression, but I don't really know what to do when I want to access one of its properties. Here's my code:
ActionScript Code:
var room:Object = new Object
room.objects = ["mcObj1", "mcObj2", "mcObj3"]
mcObj1.Description = "It's a ball and it bounces"
[Code]....
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Jul 23, 2011
how to access a property of a child of a DisplayObject.
within a class i have an object with the variable name: btnLMain i have assigned it a name property: btnLMain.name = "btnLMain"; btnLMain also has a property: btnLMain.clickNum = 0; // thats the one i need to access when i instantiate the class (btnL) containing this code in the parent class i need to access the property "clickNum" so i did this:
var dispObj:DisplayObject = btnL.getChildByName(btnLMain);
displayObj.clickNum++;
but then i get the error: 1119: Access of possibly undefined property clickNum through a reference with static type flash.display:DisplayObject.
so then i reviewed documentation and from what i understand i am not able to access the property of the child of the DisplayObject as it is a static property...
so now i am trying to figure out how to access that property in the child Class.
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Sep 17, 2009
Im dynamically creating an instance of a movieclip, call it a game piece. This game piece has 4 frames, each with a movieclip called base(although one is red, one blue, one green, one yellow). When the game piece is created I set the frame to indicate player color. Im also changing the alpha of base to 1.0 when its being dragged, 0.5 when its dropped.
Using the following code, everything works fine if the game piece color is set to the base in frame 1 (red). If the game piece is created and the timeline moved to a frame other than 1, I throw an error when trying to access base.alpha (this would be the second, third, and fourth instances of base in the game piece timeline). Heres the strange part, this is only a problem when the game piece is first created and added to the display list. Once created, even after the error has been thrown, I can access the alpha of bases 2, 3, and 4 in the drag start/stop listeners. Heres a link to the work in progress, and the relevant sections of code (shortened for brevity, t1 is the top left piece on the pallet, others just repeat the same code):[URL]
[Code]....
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Jan 11, 2011
test.fla's document class is Test.as
test.fla's library has two MovieClips ThingMovieClip and Thing2MovieClip
I tried accessing the Thing.as public var thingState's property;
directly,
using something called Casting (??),
assigning an instance name,
but something that seemed so simple doesn't work,I commented the errors I got next to each way I tried,conversely how would I access the MovieClip Thing2MovieClip from Thing.as (which is a child of Test.as because that's where it's instantiated), it just doesn't recognise an object of its parent exists, here are the 2 classes:
package com.hello.test.test
{
import flash.display.Sprite;
import flash.events.Event;[code]........
I think i'm missing some basic but fundemental understanding of ActionScript 3 and I have no other knowledge of other scripting /programming languages either.when I follow tutorials exactly they seem simple enough, but then start applying what I think is logical usage then it throws up errors..
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Jun 7, 2011
Using SDK 4.1 I was able to access custom properties of a custom button component from a custom skin. The project I'm currently working requires SDK 4.5 and I'm unable to to access the properties. Here's an example:
[Code]...
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Jul 23, 2010
I have written a piece of code where I have created a custom class containing some of my custom properties.I have used multiple instances of this custom class in my main class and added it to a container.Now I need to access one of my custom property in the main class through container.getChildByName()."custom property", but I am not able to access my custom property using this.I get an error saying
Access of possibly undefined property orientation(this is my custom property) through a reference with static type ..name of my main class.
Is there no way that can i access custom property of components through the getchildbyname method of the parent container ??
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Sep 23, 2010
I am having problems while creating object with actionscript, I am new to it and I am getting some errors. I am creating my object this way
Code:
var myMC:MovieClip = new MovieClip();
myMC.x = 50;
myMC.y = 50;
myMC.name = "hunterToken";
tCursos.addChild(myMC);
And it is created, so far everything's good
Later I try to access the visible property, and I get an error
Code:
tCursos.hunterToken.visible=false;
And I get this error:
Code:
TypeError: Error #1010: A term is undefined and has no properties.
at newSiteHTR_fla::mCursos1_1/go()[newSiteHTR_fla.mCursos1_1::frame1:157]
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Jul 10, 2009
error When your accessing a method or property from a subclass. Here's what I have done so far but no luck in my script.
1. I tried waiting for my attached movieclip to be added to my stage using the setTimeout method but no luck.
var timedProcess:Number = setTimeout(initRevealDropDown, 1000);
private function initRevealDropDown():void
{
clearTimeout(timedProcess);
var myInterface:Interface = new Interface();
myInterface.revealDropDown();
}
2. I also tried extending my subclass to interface where my instance method is defined for revealing my dropdown menu, no luck on that one.
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Mar 6, 2009
I have a button, inside an mc1 which when clicked it plays
[TweenLite.to(mc2, 2, {frame:1});]
inside mc2 -which located back on the stage.
Currently I get the error of "access of undefined property)".
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May 7, 2009
OK, I load an external SWF on stage.
I have a mc on there already, it's called 'darkOverlay' (instance name).
This is the code I'm trying to use to access it:
Code:
trace(stage.getChildByName("darkOverlay"));
if(stage.getChildByName("darkOverlay"))
{
MovieClip(stage.getChildByName("darkOverlay")).gotoAndPlay(21);
}
It returns null even when it's loaded in the main swf. What am I overlooking here?
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Feb 20, 2011
I have created a movieclip (game_container_mc) in the main.as file and I want to add a child (enemy) to it from a different file (makeWave.as) how would I do this?
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Sep 15, 2008
I have a movie clip on the stage. In the main .as file, I can easily access the instance i.e., myMovieClip_mc.x = 10; How do I do that from a class in my "classes" package? I am passing the stage instance into the constructor of the class, so I would think something like myStage.myMovieClip_mc.x = 10 would work, but it comlains that it is null.
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Apr 8, 2009
I seem to have a problem with accessing MC on stage. For example, if in my class I try to do something like this:
back_next_nav.alpha = .3;
I get the error: 1120: Access of undefined property back_next_nav.
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Nov 10, 2009
I'd like to be able to access some objects which are on the stage before compile time (e.g. in my .fla file). I can do this fine from the document class using the names I've assigned to them, but I need to be able to do this from other classes (instantiated at runtime) too.
What is the best way to go about this? Can I use the stage variable (this isn't looking likely from what I've read so far) somehow? Or do I need to pass in references to these objects from my document class when I create the instances of the class that needs to access them?
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Jan 4, 2012
I have several symbols in the library (using Flash CS5), and all of these instances have a custom base class set with a method (lets say x()). I have the symbols already positioned on the stage using the IDE, and I wanted to access them through as3 and run the method. I understand that you can instantiate a new object of an item in the library, but how would I access the object that are on the stage already?
var objectList:Array = new Array();
objectList.push(InstanceName1);
objectList.push(InstanceName2);
objectList.push(InstanceName3);
objectList[0].x(); //trying to run the method on the existing Symbol
However, flash returns an error saying that the object does not have method x(). Also looking through the debugger, it doesn't seem like the item pushed is an instance of the base class, rather it says (prototype). This works of course if I were to create a new instance of each, but I would rather access the ones that are on the stage already.
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Jan 14, 2011
In the below example, stage is always null. If I move the listener for enterframe to TestSubClass, it obviously works OK (even if the added function remains in TestClass?) - but why can't I detect stage in TestClass and reuse that code for all classes that extend it?
Some code:
Code:
// ParentClass
var testClass:TestSubClass = new TestSubClass();
this.addChild(testClass);
[Code].....
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Oct 4, 2009
im trying to do a small card trick on flash cs4 using as3.i have 56 diff mcs on stage with instance names like c1,c2,c3,c4....c56.. and i need to acces nly 10 of at a time in a random order..i ran the random no. generating codes and got 10 diff random numbers (from 1 to 56) and stored it in an array as array[0],array[1] all this works fine.now how do i access the individual movie clips???[code]
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Jul 11, 2010
In my flash document, I have a movieclip drawn on the flash stage (put there myself, not dynamically). I want to use this as a holder for an external .swf. I am using a sub-class to run the loading script. I pass the stage reference to it as the variable "theStage". It has no trouble loading things directly to the stage, but it can't find my movieclip for some reason. I have exported the movieclip for actionscript in the symbol properties panel and have given it an instance name.I've tried theStage.myMovieClip.addChild(mySwf); and suchlike, but always get this error message in output:ReferenceError: Error #1069: Property myMovieClip not found on flash.display.Stage and there is no default value.at MethodInfo-206()Some more information: It works from the main class without any trouble.
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Dec 19, 2010
I have a main document class with another class instanciated (mouse follower.as) within it. I want the mouse follower class to access a stage instance. How is this done?
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Apr 3, 2011
After quite some time I finally decided to pick up Flash again, this time taking the OOP route. I'm a bit rusty though, so I'm stuck on something pretty basic.Here's my Layout of relevant objects and scripts:
Stage > gunAmmo (TextField)
Stage > player (MC) > pistol (MC)
........ > player.as > pistol.as
As you might've guessed, what I'm trying to do is set the gunAmmo.text property from within my pistol class. I've tried using MovieClip(root).gunAmmo, stage, etc., but neither seems to be working. I sort of get why, but I don't know what the correct syntax is. (And yes, the TF's instance name has been set correctly.
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