im trying to access Stage Instance in other class but i cant
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at MyClass()
at Main()
Is there a way to get an instance reference to the document class to call a method of it from the stage's timeline?I see that here's a possible solution: using a singletonOther solution I though of is using stage.getChildAt( 0 ) but it's not very nice.Is there an 'official' instance reference? because the document class is obviously instantiated at startup, but is that instance accessible in any way without having to use a custom solution like the ones mentioned?
View 1 RepliesHow do you access an instance of a symbol created and added to the stage through the addChild(); method, from a different class?
View 3 RepliesI have to admit I pretty much ran away from Flash when AS2 came along and only used it for animation purposes over the last 5 years.So I'm having a major crash course in AS3 in Flash CS3 and I'm not enjoying it one bit. I'm getting maybe 10mins of finished work per hour as I try to figure out the limits and rules of AS3. Quite often it seems that AS3 simply can't do what I want it to. Anyway: Characterchecks.as is the main class and it loads a bunch of XML into four arrays. The file starts like this:[code]If I trace the value of, say, cc._Categories from the main FLA, it's empty. I'm guessing that the next line of AS in the main FLA doesn't wait for the previously called function to complete? (This may tie in to my next problem)My next step is that I want to display various things based on the data in the array. I have another class, Display.as which will hold all the functions to create the items on display. I thought it would be best for these to be a separate object. I wonder if I'm right?
So I declare an instance of Characterchecks in the main FLA and call it cc, and then run the functions to populate the arrays... Now I create an instance of Display and call it cd. How can I get functions in cd to see the values of the variables in cc? And if the main timeline can't tell that the functions aren't finished filling the arrays, how is cd supposed to know?I might be asking dumb questions, or maybe I'm doing things ***-backwards, I don't know. I'd appreciate any help, I really would. This whole thing has me at the end of my tether... being the most technically advanced person in my circle of co-workers and web design friends means I have no-one to explain why things need to be done a certain way or what the best way is.
I'm using Flash CS5. I have some instances on my stage declared in the main class and I want to attach some events to them, however at the time of the main class constructor, these are declared as null.
What's the best practice for accessing stage instances? Is there an event listener I could add that will tell me when the stage instance properties have been populated?
Simple example:
public class bleepBloop extends MovieClip {
public var productName:TLFTextField;
public function bleepBloop() {
trace( productName ); // Here it is null
}
}
However, when I access productName later, it's defined.
What I want to do (and I have high doubts about the possibility of this) is access the creator of a class from within the constructor of that class (without parsing a reference to it).[code]...
View 1 RepliesI have a "box_mc" movieclip on the root of my stage and I need to select it from within my Document Class. I thought Stage.getChildByName("box_mc") would work, but it just returns null.
View 2 RepliesThe problem I've encountered is that I am using a keyboardEventListener to make a movieclip run around. As I'm a college student, I'm creating this for an assignment but we are forced to use as3 classes.
When I run the code in the maintimeline, there is no problem. But when I try to access it from another class (with an 'Export for ActionScript' on the movieclip in question) I get an error he can't address the stage.
this.stage.addEventListener(KeyboardEvent.KEY_DOWN, dostuff);
I can access the targetObj instance inside the document class, but when I try to access it in another .as class,get this error:
Access of undefined property targetObj.
I am trying to add a keyboard event listener to the stage, to detect when a user clicks the left or right arrow keys. But this listener is called from inside a class file which is imported into the document class, therefore I think it doesn't know what "stage" refers to. How do I solve this?
[Code]...
I consider myself quite effiicient at actionscripting (ok not a guru) to have such problems by mistake.Anyway, my problem is that i am trying to access an MC through a buttons on rollover & rollout actions. So, the button and the MC are BOTH on the same timeline and stage, on the SAME movie clip, and they both have keyframes at the same frame. However, whenever i try to use something like
on (rollOver) {
McInstanceName.dothat;
}
[code].....
I have created a game in flash, and due to the nature of the game, I have many movieclips placed on the stage manually in Flash CS4. They are not programmatically added as children to the stage, and so I am having difficulty getting access to them in the document class. So far the only method I have been able to use is to do stage.addChild(active_area); (for example), but there are many movie clips, all very differently named, so this method seems incorrect.I've discovered that my MovieClips are not children of the stage, but in fact MainTimeline, as when I for loop through stage.getChildAt(i);, only one child, root1, is traced out. How can I access movieclips that were placed on the stage in the timeline from the document class, without having to manually add them as children to the stage? So it looks like my problem wasn't that I couldn't access the MovieClips, it was that I wasn't modifying the MovieClips' values, so I wasn't registering any change in them.
Here is the code after I fixed it:
function manage_cursor(e:Event):void {
prevX=currX;
[code].....
I've embedded a MovieClip symbol with the [Embed] syntax into my AS3 project, which I'm compiling with the Flex 3 SDK. That MovieClip has instances of other clips within it that are placed on stage with instance names. I can't just access them by instance name like I would if I were compiling with the Flash IDE. How can I reference them?
View 1 RepliesI currently pass a reference to my model through the constructor to any class that needs it in my simple mvc pattern, this can get annoying at times when it starts to go deeper.
How do Classes such as LoadMax allow you from anywhere to simple import the class, and do something like addChild(LoaderMax.getContent("bg"));? Replicating this should surely be a good way to have my model work, without the complexity of big frameworks?
for my current project I am starting to work with AS3 and I have written a ClipManager class where I can define an MC like "mainView" during initialization like this:
clipManager:ClipManager = new ClipManager(mainView);
With my clipManager I can now easily load stuff into the mainView etc. The problem is that I want every button throughout the whole thing to access Class Methods of this instance to alter the mainView
I have a music.fla and i set document class its to com.music_ct in the music.fla, i have a movieclip with instance name :aaa.[code]
View 7 RepliesI have a movie clip with a dynamic text box with an instance name inside. The movie clip is linked to a class, but when I try to access that instance name through that class it just returrs null.
View 1 RepliesI'm using a library that has a function that returns an instance of some class Engine.
I'd like to tack on some interfaces to Engine, so I subclass it class InterfacedEngine extends Engine implements AwesomeInterface. but when I change the code that uses the classes from this:
var engine:Engine = generateEngine();
to this: var interfacedEngine:InterfacedEngine = generateEngine();
It gives me a runtime error (elision mine):
TypeError: Error #1034: Type Coercion failed: cannot convert ...::Engine@1bc2bf11 to ....InterfacedEngine.
What about AS3 classes am I misunderstanding?
I have a problem with the piece of code that's been annoying me for a week. It should be very simple but all my attempts at a solution somehow seem to get thwarted by an invisible hand that wants me to fail.Here is the scenario: I am trying to create an image strip consisting of image thumbnails. When one mousovers each image it should print its information (say a name) in a textfield.I created an image container class that loads the images through a url request, then an image strip class that receives an array with image names and urls and displays them in a row. So far so good.
However when it comes to showing the info I have no clue how to address which image is being pointed at. I put a variable called imageIndex inside my imageContainer object, then put all the created containers in imageStrip's for-loop inside an array called mgContainerArray. I created a for loop in my fla that goes through this array and assigns all those containers a mouseover event listener. What I'm stumped with is that there is no way I can access the imageIndex variable from my function to tell the code which image is currently being mouseovered. It keeps giving me an error.Here is the code:
Code:
for(var i:Number=0; i<myImageStrip.imgContainerArray.length;i++){
myImageStrip.imgContainerArray[i].addEventListener(MouseEvent.MOUSE_OVER,
[code].....
I have a class LoadXML which loads and extracts data from an XML file. I am using this data for my Main class by creating a new LoadXML class. I now want to use this data for my other classes but without having to create another new instance of LoadXML. Since global variables dont exist in A3, I tried creating get methods in LoadXML and then returning these values into variables in the desired classes.[code]
View 7 RepliesWhat I want to be able to do:
- click a guy to select him
- click an adjacent tile
- move selected guy to clicked tile
The way I've coded it, each instance of a guy class has a mouse even listener on him which listens for a click. When clicked, I find out the tile underneath him, and the surrounding tiles. So far, so good.
When clicked, the guy calls a method in the tile class, like tile.onClick, which tries to say: get this tile, and send it back to a method in the guy class, like moveGuy. Then moveGuy moves the guy to the tile it was told.
Problem:
From the guy class, I call a method in the tile class. To communicate between classes, the tile class method onClick must be static. But if it's static, the method can't refer to "this", because it's a method in the class only, not on each instance of tile. But I need to know which tile was clicked, and send that reference to the guy so he knows where to go.
How do you access a method from outside its class so that the method can refer to "this" instance? OR, how do I find out which tile was clicked without needing any code on each tile instance? OR... how else can this problem be solved?
how can i access a movieclip with a instance name via a class i have tried this: public var player:MovieClip;
else if(this.hitTestObject(player))
{
this.y = player.y
}
How can i access a movieclip via its instance name in 1 class [code]...
View 3 RepliesWhat I want to be able to do:
- click a guy to select him
- click an adjacent tile
- move selected guy to clicked tile
The way I've coded it, each instance of a guy class has a mouse even listener on him which listens for a click. When clicked, I find out the tile underneath him, and the surrounding tiles. So far, so good.
When clicked, the guy calls a method in the tile class, like tile.onClick, which tries to say: get this tile, and send it back to a method in the guy class, like moveGuy. Then moveGuy moves the guy to the tile it was told.
Problem: From the guy class, I call a method in the tile class. To communicate between classes, the tile class method onClick must be static. But if it's static, the method can't refer to "this", because it's a method in the class only, not on each instance of tile. But I need to know which tile was clicked, and send that reference to the guy so he knows where to go.
How do you access a method from outside its class so that the method can refer to "this" instance? OR, how do I find out which tile was clicked without needing any code on each tile instance? OR... how else can this problem be solved?
Is this problem what getters & setters are for? I don't really understand how to use them yet.
What should I do to make a non static variable accessible to only instances of the same class?
View 10 RepliesHow to access a display object on the stage in a class which is not a document class?
I am looking for a solution that doesn't involve passing the stage as a parameter to the class.
One solution i always come across is using "TopLevel.as". Is it a good method because as far as I have heard using global variables is not recommended because it might cause some problems while working on big projects.
I was wondering how do you access the stage property from a different class that's not the principal class tied to the fla? Essentially, I have main.as which calls another class menu.as, and I can't seem to be able to use the stage.stageWidth property from menu.as. What's the proper way to be able to use the stage property from any class? Do I have to import it separately each time?
View 2 RepliesI have a TileList that is fed by a DataProvider. The DataProvider places a source Class (and corresponding MovieClip) into the TileList as visual and interactive objects. [code]...
View 7 RepliesI have make 3 classes objecthandler, box and nav. Nav is child class of objecthandler, I have make an instance of box into objecthandler and now I wanna access property of box through nav.
See the code:
Objecthandler class
package code{
import flash.display.MovieClip
import code.box
import code.nav
[Code] .....
i have instance of "HelloClass" class on my main movie : _root.mc.HelloClass.variable1.fullurl
so my HelloClass exteds movieclip and has var named Variable1 that also class with var fullurl
i want to access fullurl string value dynamically , somthing like: _root.["mc"].["HelloClass"].["variable1"].["fullurl"]
so i can access every var from external swf