ActionScript 3.0 :: Custom Class Setter / Getter Are Blank
Oct 23, 2009
I have written a class, which is basically a textfield for forms. It will eventually have several validation modes built into it too, which will be set by setting a property of the object.anyway, my problem. Basically my setters are empty if the movie is used as a loaded swf within another movie.I have an Event listener within the class listening for the Event.ACTIVATE event (still not sure exactly what this does...) though i do know that i need this in place for the setters/getters to work.If i create objects from my class, set some properties everything is spot on, though the moment i load this working movie into another movie the Event.ACTIVATE does not fire.[code]Now, if i run this movie its perfect - everything works as it should, right down to the validation.however, this movie is to be used within another movie. When i load this movie into a parent movie my fields aren't added to the movie.
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Feb 19, 2012
I recently completed a tic-tac-toe game in AS3, using some simple function-based code I had written in C many years ago.Now I'm on a quest to do it the "right way" using OOP techniques and best practices.Everything is now divided into neat little packages, it looks pretty, and the last part of my journey is to get all the little buggers to communicate with each other.I want to move the code which holds the game state from my main to it's own class in com.okaygraphics.model.GameState.The problem is nearly every other package gets and sets these game state properties.I'm trying to figure out the simplest way to encapsulate this stuff, while still allowing my other classes to access it.
1) Do I need a constructor? I mean, my program will never have more than one GameState. If I should call my getters/setters as instance methods, how do I get each other class to reference the SAME instance from their respective packages?
2) Do I even need getters and setters? Perhaps the class could just have 3 public properties? If so, how would I acheive the proper scope with regard to my other classes?
3) Should I assign everything to the class itself using the static keyword? If so, how would I implement and use those static methods?
4) Is this a mistake? Did I totally just program myself into a corner?
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Jun 3, 2010
I've created an AS class to use as a data model, shown here:
package
{
import mx.controls.Alert;
[code].....
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Nov 9, 2009
I'm having trouble updating a property value of a custom class (SubLoader) using a getter and setter. Inside the if() statement of the main fla you can see my attempt to set the percent value. Running a trace() method before the if() statement always outputs '0' for some reason. Tracing after the if() statment outputs an actual value. I can't figure out why the percent property always traces as '0' before the if statement even though I am updating it with each progress event.
[Code]...
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Dec 29, 2009
Anyone know a workaround to make static getter/setters?
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Mar 22, 2012
I seem to have run into a situation where when I push a value to an array held within a singleton via a getter/setter , Flash seem so access the getter over the setter method. Within my command/controller (I am using RobotLegs)
override public function execute():void {
// various line of code here
//Place screenshot image into an array from model for later reference.
model.unitScreenshots.push(screenShot); // screenshot is just a Bitmap object
}
The getter and setter within my model e.g. robot legs singleton
public function get unitScreenshots():Array {
return _unitScreenshots;
} public function set unitScreenshots(value:Array):void {
_unitScreenshots = value;
}
When I set a break point on both the getter and setter, only the getter method is being called, why? I would think that a push value on the array would trigger the setter, not the getter.
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Oct 11, 2011
I'm trying to create a property that can be set by extending classed and read publicly.I couldn't think of a good naming convention for a protected property with a public getter, so I tried to do this:
public function get name():String{ return _name; }
protected function set name(string:String):void
{[code]......
However I get the error (when trying to set name in an extending class): 1178: Attempted access of inaccessible property name through a
reference with static type testing:TestComponent.1059: Property is read-only.
If I change the setter to public, it works fine.
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Jun 28, 2009
i dont get the advantages of using getter and setter instead of setting the var public.
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May 26, 2010
I have two functions one that sets and one that gets a number. The set one works, but the get one doesn't. I have it trace the set it returns the correct number, but when I set the getY function, it doesn't give me anything at all. When i took the number out of the trace it just gave me back only text. What am I doing wrong here?
ActionScript Code:
public function setY(y):void {
y = y;
[code].....
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Mar 17, 2010
I have a .as file with class Main which contains:
Code:
public function set Set_AnimationFile(FileName:String):void
{
this.FileName=FileName;
[Code]....
How do i access these functions from my timeline script?
I have tried
[Code].....
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Nov 20, 2009
I'm trying to make a class that extends the Sprite, have some private properties attached to it and be able to read and write those properties using getters and setters. Simple... but the compiler throw this error "Access of possibly undefined property speed through a reference with static type flash.display:Sprite."It works if I set my class to extend the MovieClip object.Could someone explain me the logic behind this? why I can't use getter and setters with a Sprite?Here is a sample code:
package {
import flash.display.Sprite;
public class Vehicle extends Sprite{
[code].....
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Aug 2, 2011
I'm trying to make a class that extends the Sprite, have some private properties attached to it and be able to read and write those properties using getters and setters. Simple... but the compiler throw this error "Access of possibly undefined property speed through a reference with static type flash.display:Sprite."It works if I set my class to extend the MovieClip object. someone explain me the logic behind this? why I can't use getter and setters with a Sprite?
[Code]...
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Sep 9, 2011
Is it possible to have a property with a public getter and protected setter? I have the following code:
public class Mob extends Sprite {
// snip
private var _health:Number; // tried making this protected, didn't work
public function get health():Number { return _health; }
protected function set health(value:Number):void {
[Code]...
I did have this.health -= dmg; but I split it out to get more details on the compiler errors. I don't understand how the property would be considered read-only within the same class. I also don't understand how it's inaccessible. If I make the backing field, getter, and setter all protected, it compiles but it's not the result I want; I need health to be readable externally.
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Jul 27, 2009
Which is a much better practice in binding a value in Flex?
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Jul 13, 2011
I have a problem whereby in AS3 using Flash Builder 4 using a public getter with an internal setter gives me the error "property is read only", like so:
[Code]...
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Feb 26, 2007
"Getting" the hang of Getter/Setter methods, but could use a review of my syntax. Does the follwing demonstrate best practices, meaning the least awarkward application of the technique?
Code:
// in Calculator.as
class Calculator {
private var _priceCD:Number;
private var _priceShocks:Number;
private var _priceCover:Number;
[Code]...
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Nov 28, 2009
The generally used workaround for this, is to use a regular function instead of a getter/setter. This results in having to have ( ) after the function variable obviously. The question is, can a Function variable be assigned to a getter/setter function and retain its attribute of not needing brackets.
Below is some Pseudo code representing the question:
#########################################################
public class Foo(){
private var prop:Object;
public function get Prop():Object{return prop;}
[Code].....
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Apr 6, 2009
I am currently making a class called TiltVideo that extends BasicView (papervision3d).
BasicView has a getter function that returns a camera that I need to access.
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Nov 20, 2010
I have a document class .as file and I'm trying to communicate an object to another class with a getter. But it's nested inside another movie clip. The compiler says the movie clip it's nested in is undefined. Also, the moviecllip it's nested in is on the stage, dragged manually from the FLA LIbrary and has the instance name, gamelevel1 in the instance name box. I referred to it when I put the _player movie clip, which I'm trying to communicate with the getter, on the stage via and addChild method. Anyway here's the friggin' document class script:
package {
import flash.display.MovieClip;
import flash.events.Event;
import flash.display.Bitmap;
import flash.display.BitmapData;
[code]....
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Aug 20, 2010
After doing nothing with AS for quite a while (2007) I started to code a little project in actionscript 3.0. An extensive Java course cleared up a lot on OO programming, but probably gave me some false expectations too.I'm trying to program a game in which a human and computer player compete. The computer player needs to do the same actions as the human one.So for every onClick for the human player has on a screen element, a computer player class needs the same functionality. Now for some reason the clickHandler won't let me call the setter function set selected function (see the lines in red).
Code:
package Classes{
import flash.display.*;
[code]......
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Oct 25, 2010
I am start developing small games (I have just finished reading a nice book from Rex van der Spuy) but I would like to use the best OO approach.Let's make a very simple example: suppose that i have a Player class which adds a listener to the stage waiting for keyboard events in order to move around the stage.I have also some enemies on the stage and the player must register a collision with them; what is the best approach in order to access the enemies on the stage and check for a collision with them on the ENTER_FRAME player's event? I have read a lot of solutions, but I am just starting coding and so I don't know which one is the best approach.
a) Access the document class directly with a getter (e.g. Main(root).allEnemies, supposing that every time an enemy is created it is added to the allEnemies array)?
b) A singleton class which has a reference to every instance in the stage?
c) I have read about using events, how?
ActionScript Code:
package
{
import flash.display.MovieClip;[code].....
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Aug 31, 2011
When I declare a class variable
private var myVar:MyClass = new MyClass();
It creates a new instance of that class that will trace as [Object MyClass].
However, as soon as I assign it to something
myVar = thisOtherVar;
It will now trace as [Object thisOtherVar].
I need to get it back to where it's just an "empty" blank class instance, if that makes any sense at all.
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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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Oct 26, 2010
i have a slide to control the volume of a song it links to that autoplays when it starts its a blank .fla with the class Volume and an as3 file called Volume with all the codes by itself, it works perfect, but when i go to my index.fla where i try to use a UILoader to load the blank swf called volume it says:
" TypeError: Error #1009: Cannot access a property or method of a null object reference. at Volume() "
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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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Apr 22, 2009
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at QuizApp/createStatusBox()
at QuizApp()
That's the error message I get when it tries to play. What I have is an swf that loads another when its done, the new swf is blank but has a document class to an AS file. It seems the problem lies when a function is not properly being added to the stage.
The function is added like this..
Code:
package{
public class QuizApp extends Sprite{
public function QuizApp(){
createButtons();
private function createButtons() {
if (this.stage == null) {
trace("STAGE IS NULL!!!");
} var yPosition:Number;
addEventListener(Event.ADDED_TO_STAGE, addedToStage);
...
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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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