ActionScript 3.0 :: Instantiating A Custom Class Through A String?
Oct 28, 2009
I asked yesterday how to call a function from an XML file, and I figured out how to make that work using the string-to-function call.so in my XML file I have <ITEM CALLBACK="ContactsList">View All</ITEM>, and my TextMenu class parses the XML file and creates my navigatable text menu instance. When enterMenu():String is called, it looks to see if the CALLBACK attribute has a value, and if so it returns it as a String.so..
var callbackFnc:String = textMenu.enterMenu();
if(callbackFnc != null)
{
[code].....
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Aug 16, 2011
I am currently reading the Actionscript 3 Bible and the author shows an example in which a custom eventDispatcher class is created. When the class is later used in the code it's called as such:
//Thermometer is a custom eventDispatcher that extends the eventDispatcher class.
var thermometer:Thermometer = Thermometer(event.target); //why no new keyword?
I'm a new programmer and I was curious if someone could explain how this works? Why is the new keyword omitted? When you omit the new keyword on a class that extends another class is it essentially just calling the superclass(eventDispatcher) constructor?
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Feb 10, 2009
I am having an issue where I cannot use my own classes in CS3. When I try to create an instance of one class inside another class, from within the same package like this:
var t:myClass = new myClass();
gets me 1067: Implicit coercion of a value of type myClass to an unrelated type Class.
The constructor for the class is simply:
public function myClass():void {
this.isactive = false;
}
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Feb 18, 2007
I am having a problem instantiating a Character class inside of a game class.I am working on converting URL...l these tutorials to A.S. 2.0.[code]
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Jul 9, 2010
I am trying to use AMF PHP to pass variables to a flash file, thus far I cannot see anything wrong with my code, but I have very little experience with creating classes, so here it goes, here is my code,
index.php:
<?php
include "amfphp/services/flashMe.php";
$session = true;
[Code].....
Flash is looking for the flashMe class and the push method within that class, but I keep getting null variables in my flash file when I run it
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Jan 28, 2010
My Class B imports Class A.Class A is associated to an FLA. This FLA has a moviclip (MC) in its library.Now I need to dynamically instantiate that movieclip MC from Class B. How can I do that??
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Nov 16, 2010
Code:
var myOnStageClip:MovieClip = this.fileInstanceMC;
var myLinkage:Class = Class(getDefinitionByName(getQualifiedClassName(myOnStageClip)));
[code].....
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Dec 30, 2008
When I set the following class as my document class it works (draws a rectangle) but when I don't set it as my document class and instead instantiate it using var myRec:simple_shape = new simple_shape(); in first frame of my timeline nothing happens no rectangle and no error either). why and how I can get it to work without setting it as my document class?
[Code]...
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May 3, 2010
I am loading one swf into another using the Loader class, but when the child swf finishes loading and is added to the display list, its Document Class is not instantiated. I have a few trace statements that should execute when the object is created, but nothing is happening when loaded into the parent SWF. When I compile the child SWF on its own, the Document Class runs as expected.
So I'm wondering... how do I associate a child SWF's Document Class with Loader.content?
[Code]...
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Sep 26, 2011
Is there a way I can load a swf file but not automatically instantiate it's DocumentClass? Instead I want to do something like the following:
protected function mainLoaded(e:Event = null):void {
trace('mainLoaded');
var main:* = this.mainLoad.createClassByName('Main');
trace(main);
}
Where mainLoad is an instance of CasaLib's SwfLoad and createClassByName is the equivalent to
loaderInfo.applicationDomain.getDefinition();
The thing is that when my swf finishes loading I can see it is created, because of some trace calls, although its obviously not added to the display list.
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Jan 14, 2009
Here is the code:
ActionScript Code:
private class someFunction(classRef:Class):void
{
try
{
var instance:Object = new classRef();
[Code]...
Can I perform the check without instantiating?
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Nov 11, 2010
I've got a confusing situation which wont seem to fix itself basically I have my main class, my iContent class (which will hold each page and have functions for all pages), and my individual pages.
The homepage is instantiated by calling the iContentClass.goHome method in the main document class. The home page contains a button to go on to the next page. This button references the goColourBrowserPage function within the iContentClass, which removes the child (being the home page) and attempts to add a child (colourBrowserPage).
For some reason this doesnt work! It doesnt seem to add the child and wont let me remove the child of the home page! I've been sitting here for 3 hours trying to work it but to no avail!
[Code]...
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Aug 3, 2010
Is there a way to declare and instantiate an array using constants as indexes? I want to do something like:
public var arr:Array = new Array([ CONSTANT_A : "helloWorld", CONSTANT_B : "helloGoodbye" ]);
In php one could do:
$arr = array(CONSTANT_A => "foo", CONSTANT_B => "bar");
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Nov 29, 2010
I'm making an app with pages set out as classes which extend the MovieClip class.
What I've got are back buttons and different pages which go to the same page, however... If I end up going out of a page and back into a page (specifically one with drawn squares and dynamic text boxes called from a web service), it seems to have kept all of the original information.
So far I've tried killing all of the children with a while loop targeting the index and also using weak event listeners - neither is working!
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Jan 27, 2010
If I only instantiate a class once should I make its vars static? I understand how this is of benefit if I make multiple classes, clearly you use less memory as it creates a reference to the same place for each class. Are there any other benefits for creating static vars or functions ?
For example I have my class 'MainMenu' which I create once (might even be my document class). In it I create a
Code:
private var someHolderForStuff:Sprite = new Sprite();
Should I rather create
Code:
private static var someHolderForStuff:Sprite = new Sprite();
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Jun 8, 2010
I have a MovieClip symbol that has 2 frames (for now). Depending on how it was initilialized, I want it to gotoAndStop at either frame or 2.Inside my class definition (Animal.as), I have written this as my constructor:
var type:String;
public function Animal(t:String = "") {
type = t;
[code]....
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Jan 9, 2012
Let'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.
[Code]....
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Mar 17, 2011
I'm having this problem: I have an external fla (Dawn.as) and I want to instantiate the class from the external file into the main swf timeline, but when I try doing that I get an error:
ActionScript Code:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at Code::Chapter/initialise()
[code].....
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Apr 25, 2009
've tried calling constructor class from my main.fla, and it just doesn't work. The error when I try to instantiate the constructor is that it needs an argument... and since the class extends a Sprite.
PHP Code:
public functionportGal():void {
this._images = new Array();
[code].....
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Dec 30, 2007
I am trying to set up a script that will generate a matrix repeating the same symbol X by Y times. For example, b(3,2); should generate...
OOO
OOO
...and after many days of being tested by this problem I have narrowed the location of my problem down to what can be seen up in the following.
Code:
for (a=0; a<4; a++){
for (b=0; b<4; b++){
var z:Number = ((a*4)+b);
_root.attachMovie("Light", ("L" + z), _root.getNextHightestDepth(), {_x:(a*45), _y:(b*45)});
}
}
For some reason, that loop will only attach one copy of my "Light" movie. I cannot seem to figure out why more are not added. I am putting that code on the first frame of my movie. There is nothing else in my project yet.
I have compared my array to [URL]
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Aug 19, 2010
I have a symbol named picHolder. In symbol properties under linkage, I chose "Export for ActionScript" and "Export in frame 1" and gave it a class name of picHolder.Normally, to instantiate a new instance, I'd say:
Code:
var tempPic:picHolder = new picHolder();
and I'd go about my way.
[code].....
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Jan 23, 2010
I am new to AS3, as well as Flash in general, so forgive me if this seems highly elementary. All I am trying to do is create a custom class that extends the MovieClip class and contains a custom property of "marker". I want to be able to use and change the value of this custom property on the timeline for an instance of this class and have it behave just like any other (Ex: this.x ==> this.marker).
[Code].....
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Jun 16, 2011
I have a custom class being constructed from my main class. In the custom class it has another custom class that is passed in as a parameter. I would like to strictly type the parameter variable but when I do, 'the type is not a compile type constant etc'.This, I understand, is because the custom class used as a parameter has not yet been constructed.It all works when I use the variable type ( * ) to type the parameter.I suspect this is a design flaw, in that I am using an incorrect design pattern.It is actually hand-me-down code, having received a large project from someone else who is not entirely familiar with oop concepts and design patterns.
I have considered using a dummy constructor for the parametered class in my main class but the passed in class also takes a custom class (itself with a parametered constructor). I am considering using ... (rest) so that the custom classes' parameters are optional.Is there any other way to control the order of construction of classes? Would the rest variables work?edit)in main.as within the constructor or another function
var parameter1:customclass2;
customclass1(parameter1);
in customclass1 constructor:
[code].....
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Dec 2, 2011
This is my first time working with a class attached to a movieclip that is nested inside a class attached to a movie clip.I've tested all the properties and methods of PTListItem.as and they work properly but when I try to call them on the list item through PTListTop.as it returns undefined.The end goal is to dynamically load a checklist via a txt file.
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Nov 4, 2011
I have the following situation:I have an event handler, that displays small messages in my application's statusbar.These messages get passes through by dispatching events from custom components.A simple message could be like "HTTP Error" or so.Now, the main event listener, in the main application file, listens to the event dispatched by any custom component,but seems to refuse listening to events dispatched by custom AS classes.Here is my code for the custom event:
package main.events
{
import flash.events.Event;[code]..
So to sum it all up:
- The event listener listens to the custom event dispatched by any custom component.
- The event listener does not listen to the custom event duspatched by an AS class.
Those who wonder, the event really gets dispatched, that's why I added a trace call.
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Jan 25, 2010
I couldn't work it out yet...
package components {
public class templateSelection extends VBox {
static public var tempSelectionBag:Dictionary;
[Code]....
I want to have a custom class tempSelection with a Dictionary as a public accessable property of that class. If I use this code, the compiler tells me:
1046: Typ wurde nicht gefunden oder war keine Kompilierungszeit- onstante:Dictionary
Which translates to:
Type was not found or was not a compile-time constant: Dictionary
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May 24, 2010
how do convert the myString var which is a string to the class name?
var myString:String = "movieClipInTheLibraryClassName"
var t:myString = myString()
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Nov 21, 2007
Getting this error when instantiating this class. It's set up in my FLA as the document class:
ReferenceError: Error #1056: Cannot create property tab0 on
classes.tagwidget.TagWidget.
at classes.tagwidget::TagWidget/::addTabs()
at classes.tagwidget::TagWidget$iinit()
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Aug 16, 2011
If I have a Document class that extends MovieClip, and I want to use it as the basis for another Document class, is it possible to create a subclass that extends the main document class and use that for a different FLA?
For example,
fla1.fla has a document class of MyMainClass:
public class MyMainClass extends MovieClip
fla2.fla has a document class of MySubClass:
public class MySubClass extends MyMainClass
I've tried, but now I'm getting errors that all of my variables that reference stage instances aren't being found.
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Apr 20, 2011
I have a custom class created by a main document class, and I want the custom class to run a function in document class after some time.
How can I sent the instruction from custom class back to the document class?[code]...
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