Javascript :: Instantiate Within Abstract Class?
Feb 11, 2011
I have an abstract class which gives specific 'base' behavior to multiple sub classes. I want to instantiate a Singleton inside this abstract class. Is it good practice to:a) instantiate a class within an abstract classb) do this with a Singleton (I know these may be frowned upon)For clarity I will give an example, the method instantiating the Singleton is:
public function createErrorRepository(repositoryType:String):void {
this._errorFactory = ErrorFactory.getInstance();
this._errorRep = this._errorFactory.createErrorRepository(repositoryType);
[code].....
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Nov 25, 2010
what is the keyword that allow me to implement an abstract class? It was asked in my interview..Can you say it from both java and ActionScript(flex)
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Feb 2, 2009
whats the purpose of having to have an extra class such as abstract class in Flash where the methods has no implementation,but the subclasses declare those implementations.The advantage of having the methods declared in subclass than the superclass is that it would not affect the other subclasses when there are certain changes.That makes me wonder, isn't it better not to extend(inherit) empty methods but directly create a class as its own? unless there is something that the child could use from parent.Anyone could give me examples of how applicable using abstract classes/interfaces?
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Sep 19, 2009
I keep getting this error: Incorrect number of arguments. Expected 0.Probably just something stupid... but I'm struggling...I have two classes (ribostrand.as and nucleo.as) in a folder called architect. The main FLA file is outside the folder.I'm trying instantiate the nucleo class with parameters, from the ribostrand class... but its not working.
var ribo:nucleo = new nucleo("A",50,50)
< code moved to the next thread and reformated >
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Oct 28, 2009
I was chatting with my buddy about this, he is convinced you can do this and says he has done it, but I cannot get this to work.
I am wondering if it is even possible at all. I tried typing a var as a Class that is within the externally downloaded SWF and then making an instance but no can do.
some code
private static function onCompleteHandler(e:Event)
{
dashboardObject = e.target.content;
// registerClassAlias("Dashboard", ); doesnt work
[Code]....
So it seems you cannot make an instance of a class unless it is complied within the project SWF. Which if true is what I want it to do. I do not want people trying to make instances of my classes just from downloading the SWF file for what I am building here.
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May 26, 2010
To call a class we would type: var testClass = new TestClass();Can I store the class in an array, and somehow pull it when I want to call it the same way? I need to be able to call a new class like the example above, but from an array.
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Mar 23, 2011
How can I instantiate another class object from a class instance? In the code below (which doesn't work) I'd like the function to return a new class instance based the passed argument's class. In other words, I want the function to return a new instance of MySprite without having to call new MySprite();.
var mySprite:Sprite = new MySprite();
var anotherSprite:Sprite = makeAnotherSprite(mySprite);
function makeAnotherSprite(instance:Sprite):Sprite {
return new getDefinitionByName(getQualifiedClassName(instance));
}
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Nov 15, 2010
I'm trying to use a listbox to instantiate a class. "SEA30_05_215_Single_Classroom" is a class that is loaded in using another function just fine. When I attempt to use the function below I get an error that says "Instantiation attempted on a non-constructor."Any ideas how to either fix the error or do it a different way? It seems like it should be a fairly simple thing to instantiate a class using a list box..[code]
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Nov 18, 2010
The following code works to instantiate a class from a listbox selection...
[Code]....
But when I try and load the same label and data from XML it does NOT work... Below is the for loop that I'm using to parse my XML and populate the listbox:
[Code]...
The setupID should be populating with a class that I can instantiate (just like when I hard-code it without using XML). Instead I get the error "Instantiation attempted on a non-constructor." I also received this error when I had quotes around the hard-coded version. So, I'm assuming that maybe the XML is being read as a string. But I haven't been able to find a way to cast it differently. I've been stuck on this for quite some time now.
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Apr 13, 2011
Possible Duplicate: Where is the "proper" place to initialize class variables in AS3
Whether its better to instantiate class on it's variable declaration or within a constructor? For example, this:
protected var _errorHandler:ErrorHandler = new ErrorHandler();
or this:
protected var _errorHandler:ErrorHandler;
public function someClass() {
_errorHandler = new ErrorHandler();
}
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Aug 3, 2011
I've got a string which, in run-time, contains the name of a class that I want to instantiate. I read suggestions to use
flash.utils.getDefinitionByName():
var myClass:Class = getDefinitionByName("package.className") as Class;
var myInstance:* = new myClass();
However, that gives me the following error:
[Fault] exception, information=ReferenceError: Error #1065: Variable className is not defined.
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Dec 27, 2011
Can someone point me in the right direction on how to instantiate any class at runtime with any given number of arguments?
As an example and to be more precise, I included an example below. How could I write this example in one line of code - ok, maybe two : )
[Code]...
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May 31, 2010
I purchased a coverflow gallery and I trying to using it wthout the Document class.
I trying to instantiate the class in other movie using this code:
Code:
package {
import flash.display.MovieClip;
import com.greenlab.website.cf.CoverFlow
[Code]......
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Oct 13, 2010
I have some classes stored in a swc which I would like to instantiate using data pulled in by xml - using a string to reference the classname.So where I would normally use
ActionScript Code:
var tagline:Sprite = new Tagline1();
I would now like to do something like
ActionScript Code:
var tagname:String = "Tagline1"; // really the string comes from XML
var tagline:Sprite = new [tagname]();
I have a vague idea this is possible using square brackets, but I don't seem to be able to find out anything about it.
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Feb 17, 2010
Using org.as3commons.reflect I can look-up the class name, and instantiate a class at runtime.I also have (non-working) code which invokes a method. However, I really want to set a property value. I'm not sure if properties are realized as methods internally in Flex.I have a Metadata class which stores 3 pieces of information: name, value, and type (all are strings).I want to be able to loop through an Array of Metadata objects and set the corresponding properties on the instantiated class.[code]I realize that I have to declare a dummy variable of the type I was to instantiate, or use the -inculde compiler directive. An unfortunate drawback of Flex.Also, right now there's code to account for typecasting the value to it's specified type.
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Apr 6, 2010
example:
var c : Class = Sprite;
//This can be random class such as movieclip/etc
var o = getDefintionByName(getQualifiedClassName(c));
this works, but in flash develop, it says that the variable 'o' has no type declaration
which basically means
var o : SOMETHING = getDefintionByName(getQualifiedClassName(c));
but how do i put that something there when i do not know what its coming because of random classes?
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Sep 1, 2011
I'm unsuccessfully attempting to instantiate a reference of a class that is passed as a parameter to another class. In this example there are 3 classes:
MainClass, Canvas, MyCircle
From the MainClass I am creating an instance of Canvas, which is passed a class reference of MyCircle as I want to create instances of MyCircle from within Canvas. However, the MyCircle constructor contains required parameters that are created from within Canvas. How can I pass and instantiate a class reference with required parameters?
MyCircle:
package {
//Imports
import flash.display.Shape;
//Class
public class MyCircle extends Shape {
[Code] .....
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Dec 3, 2011
In my Runtime Shred Library SWF I have a class named BackButton that extends MovieClip and interfaces IGameButton:
package com.game.button
{
import com.interfaces.IGameButton;
[Code].....
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Dec 4, 2011
I have the following class, I want to do what is in the comments.I know I can do it with conditionals.I'd like to know if there is a way of doing that dinamicaly.This code is in AS3, but I know maybe this is related to javascript because AS3 is based on ECMAScript
public class ClientStatus
{
public static const INVITED:int = 0;[code].....
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Feb 7, 2011
Is it possible to create Abstract classes in AS3?
In other words, is it possible to declare a virtually pure method in AS3?
For instance, from my C++ knowledge, is it possible to do something like this in AS3[code]...
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Oct 27, 2010
I want to break my code into several classes for the sake of readability and reusability, but I keep getting various errors for code that works perfectly well when it's all contained in the DocClass.
[Code]...
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Jul 16, 2009
I'm building a demo that has a keyboard in it. Obviously, people will type stuff with it and it will go into a dynamic text field. So I have a full keyboard (a movie clip named "keyboardStandard") made up of button symbols. That is placed in the same frame as the text field. Then I wrote this code, using the Q key ("keyQ"):
Code:
keyboardStandard.keyQ.addEventListener(MouseEvent.CLICK, addQ);
function addQ(ev):void {
enterPlayerID_txt.appendText("Q");
}
This works just fine, the Q goes into the text field. However, I sure as heck don't want to write 26 event listeners, then 26 more functions, even if it is copy paste. That's just gnarly. Plus, there are actually 3 keyboards - a numeric and special char one as well I need to handle.I seems passing a parameter from the event listener is not doable?
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Oct 31, 2010
I am now trying to make a flash intro for my web site.I have downloaded some free templates for the same and examined them.Some special effects, means colour abstrract moving effects or explosion like effects are in that 'fla' file.They appear as movie clips. I can export them as flv also.How they are created? Is it in flash itself or from some other programs like after effects or something?I would like to create such effects for myself. If it is not in flash, then there is no point in wasting time figuring out the methods by myself.
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Feb 2, 2009
Can it be done in flash with some of the glow filters? Or is this probably being created in something like After Effects or Motion and then being pulled in as JPEG StillsI've looked through some tutorial sites, but most of the animation tutorials are pretty basic... and I'm not sure what to really call the effect...making searching for tutorials or forum posts a bit tricky
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Feb 22, 2012
I apologize in advance if my question is not clear, because I don't know how to put this. What I am trying to do is to reduce few lines of repeated code by implementing various OOP methods/concepts.
The problem I have few set of of classes which has initialization process. So, I am implementing an init() method in all those classes. From the calling class (main), these objects will be instantiated and init() method of each object is called in the the order and call some other process after all of them are initialized. Something like this
[CODE]...
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Dec 10, 2009
Im building a project using an MVC pattern. I have (pseudo) abstract classes Model and View, each extended with particular models and views. But I cannot access properties on the extended classes of Model...Model simply distributes XML data, heres its constructor:
Code:
public function Model(data:XML)
{
_data = data; /*_data is a protected var of type XML in Model*/
}
MainModel extends Model, and has a property called _background of type Background which also extends Model:
Code:
private var _background:Background = new Background(some XML source);
public function MainModel(data:XML)
{
[code]....
The problem arises when I try to pass MainModel's background property as a parameter of _bgView (highlighted in red above). The compiler says there is no background property on Model, which is true, but I need it to look at its extended class MainModel, not Model. I've typed MainView's constructor parameter with MainModel, but it is still seeing it as Model.
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Dec 10, 2009
Im building a project using an MVC pattern. I have (pseudo) abstract classes Model and View, each extended with particular models and views. But I cannot access properties on the extended classes of Model...Model simply distributes XML data, heres its constructor:
Code:
public function Model(data:XML)
{
[code]......
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Jun 4, 2010
what I meen is to get all objects and their properties, is it possible? How to do such thing?
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Jun 3, 2010
In Flash Player 10.1 and later, the ScriptBridge class provides another way to communicate from JavaScript running in a browser to ActionScript (but not from ActionScript to JavaScript). The ScriptBridge class offers significantly better performance than the ExternalInterface class, and provides access to the entire ActionScript 3.0 API from JavaScript. By contrast, the ExternalInterface class provides access only to callback functions in ActionScript.If you need to call JavaScript from ActionScript, or need to communicate between ActionScript and any other programming language
you must use the ExternalInterface API. If you need to call ActionScript from JavaScript, the ScriptBridge class is recommended. The rest of the section describes the ExternalInterface class.my research makes me believe that this new Flash Player plugin API is most likely resulting from implementing recent changes in the Netscape Plugin API. Hopefully it should be as simple as having the player script NPObject properties and functions to use to access objects, packages and classes of the flash application.
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Jan 13, 2010
How do I create a custom event class similar to ActionScript? What I mean by that is a class that I can use to fire off my own events, send the necessary data.
I don't wanna use third-party libraries like YUI or jQuery to do it. My goal is to be able to send a event that looks like this.[code]...
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