my understanding of extending classes is that you gain all the functions and methods of that class thus You could over ride any one of them. How ever I am confused on weather or not you inherit and can over ride private methods of the class you are extending or if you have to have all methods public in an extended class.
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I am writing class that extends adobe air PNGEncoder,
I want to use the writeChunk method, but it seems to be private static and i cant seems to use it with my code But it gives the error as below
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1.Is there any way to access the private data members of a class in action script using asmock framework? I tried using syntax likeContentPlayermockContentPlayer;Where in getContentPlayer is a private member and mockContentPlayer is alias am creating, but its not working well, I doubt whether I can do like this?
View 2 RepliesLet's say I have a defined ClassA. ClassB extends ClassA and there's a Movie Clip instance on the stage linked to ClassB. How would ClassC access the properties and methods of ClassB without extending ClassB or creating a new instance of ClassB? The way I'm currently doing it is by referencing the stage instance linked to ClassB and then using the dot syntax to access ClassB instance variables, and this works only if the the accessed variables are public or internal, depending on what package ClassC is part of. I would like to know if there's a better, cleaner way to accomplish this.
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ActionScript Code:
class Vector2d extends Math {
private var x:Number;
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I can't seem to get my private variable, x, to be private. From my understanding of private variables, tracing n.x should throw an error, and adding 150 should throw an error. I've tried changing the variable's name, and the cast type, to no avail. The first trace goes through, the addition goes through, and the second trace goes through.
I'm new to classes, so I could easily be overlooking something vital. But the vars need to be private, because I want to use get/set to update the variables when one or another changes. For instance, if 50 is added to the y value, the magnitude and unit vectors would change, so I want to update them using getMag and getUnit. That whole system would be thrown off if the user had direct access to the properties.
I have some code from a CS3 app composed of the .FLA file with an .AS file for the class that had definitions for two private classes in it. Yesterday I brought the files into CS4 and noticed that they did not compile. Gives an 1120, access of undefined property and names a constant. I have reduced this problem down to bare bones and it still occurs, so it is a bug in CS4.
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Say I have a document class called index, where I set up some variables and methods and include a class.
I get this error:
Error: Error #2136: The SWF file file: index.swf contains invalid data.
at com::index/initIndex()
at com::index()
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im trying to port my code to as3 but i stumbled on a problem i have no idea how to fix.
error report:
Code:
verify PointAirFri$iinit()
stack:
scope: [global Object$ Point$ PointAirFri$]
locals: PointAirFri Number Number Number
0:getlocal0
stack: PointAirFri
scope: [global Object$ Point$ PointAirFri$]
locals: PointAirFri Number Number Number
1:pushundefined
stack: PointAirFri void?
scope: [global Object$ Point$ PointAirFri$]
locals: PointAirFri Number Number Number
2:setslot 14
stack:
scope: [global Object$ Point$ PointAirFri$]
locals: PointAirFri Number Number Number
4:abs_jump 78424138 45
stack:
scope: [global Object$ Point$ PointAirFri$]
locals: PointAirFri Number Number Number
0:getlocal0
stack: PointAirFri
scope: [global Object$ Point$ PointAirFri$]
locals: PointAirFri Number Number Number
1:pushscope
stack:
scope: [global Object$ Point$ PointAirFri$] PointAirFri
locals: PointAirFri Number Number Number
2:getlocal0
stack: PointAirFri
scope: [global Object$ Point$ PointAirFri$] PointAirFri
locals: PointAirFri Number Number Number
3:constructsuper 0
VerifyError: Error #1063: Argument count mismatch on Point$iinit(). Expected 3, got 0.
at PointAirFri$iinit()
at docClass/::init()
at docClass$iinit()
this is how the defined the classes:
Code:
package{
public class Point
{
vars
public function verlet(a)
{
code
}
public function savePoint()
{;
code
}
public function restore()
{
code
}
public function Point(__x:Number, __y:Number, __fr:Number)
{
x = __x;
y = __y;
dx = 0;
dy = 0;
vx = 0;
vy = 0;
friction = __fr;
}
}
}
package{
import Point;
public class PointAirFri extends Point
{
private var airFriction;
public override function verlet (a)
{
code
}
public function PointAirFri(__x:Number, __y:Number, __afr:Number)
{
x = __x;
y = __y;
dx = 0;
dy = 0;
vx = 0;
vy = 0;
airFriction=__afr;
}
}
}
if anyone has any idea why that error happens please enlighten me
Is it possible? If so, what's the preferred way? I'm seeing lots of ArrayUtil and StringUtil AS3 classes, but I don't like using them as it defeats the purpose of an object (StringUtil.trim(str) instead of str.trim()).
View 4 RepliesI dont understand how extend workes.. when i extend a class,will it replce that class entery point or will a class that extends another have "two" entery points? And can i pass paramters to the extended class?
View 3 RepliesWhat is the difference between importing a class and extending a class, I know that when you extend you add all the properties/methods of that class to your own class, but I am still un sure of what this actually does for you and your program, I am pretty confused on the topic and I couldnt find the difference between the two on the internet, also how do you know which one of the two you need to do?
View 8 RepliesI'm creating a class that extends another class.
public class ASClass extends UIComponent{
}
but I'm trying to make it extend multiple classes. Is this somehow possible? I read it may be possible through composition?
I've recently come to a roadblock in my code for a non-visual class I created; a sound class if you want to know. At first I coded with it extending Sprite (I can't remember why I started it out that way, but that's the way it was). When I came back to this code, I thought that extending sprite doesn't make any sense if it's an audio class and non-visual, where is no real reason to add something to the stage if you can't see it. So I removed "extends Sprite" from the class and errors started popping up around "dispatchEvent" coded areas. I then tried putting back the extention with "extends Object", hoping that would solve the problem; got the same thing. I've searched with google on why I can't use dispatchEvent on objects or classes not extending anything, but it only came up with how to use dispatchEvent with the usual MovieClip or Sprite tutorial.
View 3 Repliesi have a class A. it uses this code:
Code:
public function SideModule() {
if (stage) {
init();// stage accessible, call init function[code]....
if i extends thsi class with class B (class B extends class A) how will i get this events in class B? do i have to register for them in class B as well?
I am creating an object pool to cache some recyclable objects in memory at the outset of my application in order to avoid (as much as possible) the performance issues caused by GC running; if possible I'd like to minimize the memory my object pool reserves, so I'm attempting to pool generic forms of the objects (with no methods) and then casting the generic variants to more specific and complex object types which extend the generic form when I actually want them on the stage.
The trouble is that to do this requires the generic variant class to import/extend MovieClip (because the more complicated objects are themselves MovieClips and make use of DisplayObject methods)-- does simply importing and/or extending a class add to the memory an object takes up when instantiated even if it never uses methods from the inherited class? It makes sense that it would, and some light profiling seems to suggest that it does, but I'm not 100% certain. About how large should an 'empty' MovieClip instance be in bytes?
I have a library symbol, exported for Action-Script and to Frame1. Now in the document Class, i write
public class Test
{
public function Test():void
{
[Code]....
Now the code works fine but when i write my own (sealed/fixed) Box Class that surely Extends MOVIE-CLIP, statement-2 gives error , i know the Box Class is not dynamic but the Movie-Clip is Dynamic. Now what i understand that Movie-Clip Class being dynamic becomes fixed/sealed when it is extended by any Fixed/sealed Class???
I'm currently developing a game in flash and want to be able to divide up my .fla assets in a way that means artists can work on a game menu .fla in isolation from the game.fla and rest of the game code.If I could briefly explain how I've approached this so far, I would be extremelyMy project is setup like this:HighScoreMenu.fla -> document class HighScoreMenu extending GameMenu class.game.fla ->document class game.asgame.as class loads the published HighScoreMenu.swf and manipulates the menu i.e. animates on and off screen via inherited functions in the GameMenu class.
Now this seemed to work to begin with, until my code evolved and upon going to publish my HighScoreMenu.fla flash started complaining about symbols being used in Game.as that were in Game.fla... If I'm only publishing the HighScoreMenu which extends from GameMenu then why is it even looking to compile Game.as
I'm trying to create a base class for components by extending Group in Flex 4, but I can't seem to define the layout through MXML. Any time I try to move the definition to a subclass of my base component, I get the following error:
Error: Could not resolve <s:layout> to a component implementation.
Judging by that error, it seems that some magic from the framework's side goes into assigning it for a Group and thus the compiler fails when trying to assign it for any other classes. Does anyone know how this is supposed to work? how to allow me to define it in subclasses?
I want to create a game using pure AS in FlashDevelop.
The problem is that there are some methods I want to use, and because I don't like copying/pasting code, i decided to define in classes. Here is an example:
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When I hit compile, I get an error like Call to a possibly undefined method distance through a refference with static type Class.
Is there a way in AS 3 to list all classes and their associated methods? Or at least a way to list the methods within a particular class?
It seems that it's all so overwhelming and although I'm well versed in Lingo and have a handle on the Lingo dictionary,I feel as though the AS 3 library is dauntingly big.
I have this problem from time to time with AS3 where I extend a Class and then try call methods and variables which are public from the new class but I get errors that method or variable doesn't exist. My IDE recognises the methods and variables though.[code]When I run the script flash hates it. I thought when you extend a class it was supposed to inherit its properties and methods?Does anyone else have these problems? I shouldn't have to cast it as Box. I swear I have this working in a project but cant see the different in setup?
View 4 RepliesIt's not clear to me, where I have to define Classes and Constructor methods. In AS2 it was possible, to define a class "light" by defining a constructor method. In AS3, I read, a class can only be defined in an external AS-file. Is it still possible to use the constructor method inside the Flash-File or do I have to source out all my constructor methods and implement them into real classes into an external AS-File?
View 4 RepliesFrom what I read, interfaces are basically classes for methods, right? If two classes implements the same interface, then they should both have methods described in the interface.
Now, how is this useful? Let's say I want to call foo()
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I am trying to do an app that requires me to change the behavior of a few native methods and classes of a an application.I want to override methods such as:ExternalInterface.call, ExternalInterface.addCallback, flash.net.navigateToURL in a loaded movie.There are a few ways to do this for example:1. Getting the SWF's bytecode and decompile it. Then change the symbols table with my own class.2. Loading the other movie in my applicationDomain, by doing so, I would be able to rewrite it's own classes.o do (2) what I did was:1. Turn off the "-strict" flag.2. Turn on the "-es" flag.in the compiler and then do something like:
Code:
flash.net.navigateToURL = function(u:URLRequest,window:String):void {
throw new Error("yay it works");
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I have a question about classes. I just learn that static means that functions and/or properties are specifics to a class, but is it a synonym of private? And why statics (not available to any instances?) properties and/or methods can have a public (available anywhere else (timeline)) access modifier? PS: I just start with classes.
View 6 RepliesI have an application using a class that was originally a MovieClip exported for Actionscript by Flash. I have not been able to figure out how to add new properties to this class.
View 8 RepliesImagine I have a game with a base Entity class, with an init method that takes no arguments. Now I have a Wizard class, but I want to pass in 2 parameters, say speed and strength. In AS3 (and I believe Java and C#) I will not be allowed to do this - it is an "incompatible override" because the method signatures won't match. Now I could just make an "initWizard" method instead, but then I have the problem of the init method of each class potentially having different names. I need solutions that work in AS3, Java or C#.
View 2 Replieshere is a snippet of my code in an as file
ActionScript Code:
class PoolBall extends MovieClip {
private var poolBall:MovieClip;
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there are classes definitions where all their methods are private my question is why are they private, because i've tried a code wherein i changed all the private access modifier to public and nothing changed!
what if you make an instance of that class with all its method private, how are you be able to access that on another class. coz i know private methods are only accessible to the class where they are declared! will the instance of that class be able to access the superclass's private methods!
on private variables, it's still not clear to me as to why make a private variable and then use a getter and setter, when you can simply make it public! are these variables called static?cause on the way i understand it private functions and private variables are static?
Okay so you've got your private vars in your AS2 Class, you think they're all safe right? Wrong.
Doing a trace(MyClass.myvar); will spit out an error that the var is private and you can't touch it.
But a trace(MyClass["myvar"]); will work perfectly fine. You can use it normal, without any setters getters outside the class.
Is there a way to protect against this? I think this is a huge security flaw. I know it's simple OOP, but a private var in an object should have rules.