ActionScript 3.0 :: Flash Using A Listbox To Instantiate Class
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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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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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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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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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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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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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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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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Mar 16, 2010
I am able to load my XML file into flash and trace results. Want to populate listbox with information from xml file.
[Code].....
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Jan 18, 2011
I made a Post-It note movie clip that is draggable. I want to create a whole pad of notes, or at least simulate this. I thought the best way to do this would be to add another Post-It whenever the startDrag() is triggered.
I first tried creating the Post-It with symbols but didn't think I could dynamically create new ones this way. I then created a class and added it to the stage[code]...
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Apr 10, 2011
Instead of
public class MyMainMovieClip extends MovieClip {
public function MySliderComponent() {
var myLoader:Loader = new Loader();
[Code].....
I get no error in second case but nothing shows up but stays blank.
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May 25, 2010
I'm populating a listbox like this: dp.addItem( {label:"red dress", data:"OV4MP/23OL.swf"} ); Instead of data:"OV4MP/23OL.swf", I would like to make part of the data file name a variable from a dynamic textbox named centerPt that belongs to the parent movieclip, so I did this: dp.addItem( {label:"red dress", data:"OV4MP/23"+MovieClip(parent.parent).centerPt.text+".swf"} );
[Code]....
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Nov 4, 2002
This is a Flash MX actionscript question - I thought that it would be a cool usability thing if, when the user gets to the bottom of the listbox, it scrolls down one or two places automatically.
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Apr 15, 2005
i want to amke one application in flash same functionality what is can u guys tell me how to make selection of one item in combobox to update the value of the listbox below and how to make the different folders and subfolders with icon as they have done
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Oct 27, 2010
I have a movieclip created in the IDE exported to Actionscript via the Library panel (Linkage?).I instatiate multiple instances of it via a loop on the timeline.I want to move them around randomly via Actionscript. How do I do that?I tried using listeners, but I have no way to store values to make each movement unique.
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Aug 25, 2011
New to AS3, long time programmer. Essentially I am creating a myriad of objects, all of which will have the same functionality, although the properties will vary between each object, including the artwork. I believe they will all be movieclips as they will be interactive and I believe they will be moving.
I am wondering what the best way to create these objects are. I am assuming that I create an object class with the functionality and properties, I'm just unsure how to instantiate multiple copies with different properties, if that makes sense.
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Oct 5, 2009
i am using flash listbox component in my project. and i want to it's text alignment form left to right and it's scrollbar position is right to left.
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Nov 16, 2011
Okay, so i have a bunch of simple shapes in movie clips... THen, i have "levels" that are each in their own movie clip... Sometimes in the levels i have to instantiate these random movie clips on the fly and create multiple instances, so ill just do something like
[Code]...
This works great..but... in another movie clip now on my "level 2" movie clip I literally take the same exact code, that worked in level one...But now it will not work in this other movie clip.... I get this error whenever i try hexagonOne = new hexagonOne(); or ANY other shape movie clip i try to instantiate. Symbol 'lvl1-2', Layer 'Layer 2', Frame 1, Line 99 1180: Call to a possibly undefined method hexagonOne. I don't understand because it worked fine inside the other movie clip, which is just like this one...It makes no sense.
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Feb 29, 2004
Is there a way to modify the text size of text added to a ListBox Component in Flash MX?
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Jul 28, 2009
The Listbox is populated with the category and the image and caption is being shown in the correct place but the list box doesn't function and the images cycle through all and not just the ones in that category.Here is my code
Code:
var ssx:XML = new XML();
ssx.ignoreWhite = true;[code]...........
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Jul 28, 2009
Migrating to AS3 is being harder than I supposed, because the way things are referenced. I have a stay movie clip instantiated from library like this:
Code:
var mcMyMain:MovieClip = new mcMain();
addChild(mcMyMain);
var mcMyChild:MovieClip = new mcChild();
mcMyMain.addChild(mcMyChild);
Within mcMyChild I have a timeline with some animation, and, at the end of this timeline I want to instantiate another movieclip in mcMyMain (that is in stage) like this:
Code:
stop();
var mcMyTest:MovieClip = new mcTest();
stage.mcMyMain.addChild(mcMyTest);
[code]....
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Dec 12, 2011
I would like to know if its possible, to use a string in order to create a UI element.I think many people have this kind of problem, they want an easy setup in flash to generate a dynamic UI, through code.It should look like this (pseudo code):
addToStage("Button","add");
addToStage("TextInput","name");
private function addToStage ( o : Object, str : String ) : void {
[code].....
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