Flex :: Determine Which Class Has Called A Function?
Apr 16, 2010
I am working on a Flex Front End at the moment, and have been using the Parsley framework for passing messages/events around.
I was wondering if there is a simple way for a function (in this case, an event's constructor) to obtain a reference to the object which called it?
This is to ensure that a certain event that I am defining can only be dispatched by one specified class. My thinking is to check the caller of the constructor somehow, and throw an error if it is not of the correct type.
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Dec 28, 2011
mainClass.as
package {
import mfClass.CarSelector;
import flash.display.MovieClip;
import flash.events.Event;
public class MainClass extends MovieClip {
[Code] .....
Now, when I run this in flash. I get this message.. in output.
TypeError: Error #1006: sel_Fun is not a function.
at MainClass/show_selector()
at MainClass()
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Mar 9, 2010
i got a class(class1) that extends another class (class2)...when something happens in super class, i need to update the class1, soi need to trigger a function in class1 from class2... I know is bad programming, but is that possible? I'm confused
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Jan 10, 2012
I have an AS3 program that calls a function multiple times. The function must return multiple variables, so I created a class for the function to declare an object containing all of these variables. For example, here's my class:
package
{
public class PER
{
[Code].....
Let's say the calling program calls the function, which returns the variables into data_set1 (where data_set1 depends on input variables arg1, arg2, arg3) using:
var data_set1:PER = function_name(arg1, arg2, arg3);
The calling program does some stuff, then calls the function again, but returns the variables into a new variable name, data_set2:
var data_set2:PER = function_name(arg4, arg5, arg6);
My intention is that data_set1 and data_set2 are different (e.g. not linked together).
My question is, given that arrays are passed by reference, will data_set1 be modified to agree with data_set2 upon the 2nd function call? Why or why not?
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Oct 8, 2009
I've been banging my head against the wall with this one. I have the following set function in Flex. [code]If I set the periodChangeAmount to -1 or 1 the set method gets fired. If I set it to zero it doesn't get fired. What's the deal? Does anyone know why it wouldn't get called when setting it to zero. If I change the object type to a number or even an object it still doesn't work as expected.
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Mar 3, 2010
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Sep 11, 2009
I recently found a method (ByteArray.clear()) that FlexBuilder complains is possibly undefined; however, the method is in fact documented in the Flex LiveDocs. It must have been added in a later version of the SDK than I have installed. I'm not asking about this particular method, but I'm giving it as an example of the documentation issue that I'm trying to resolve. My questions are:
How can I determine what version of the SDK or Flash player that a method or property was added in? How can I tell which versions of the SDK are supported on which Flash player versions?
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Oct 11, 2009
I am creating a Datagrid in AS3, and adding a sort function to a column. However, this sort function does never get called. Any ideas?
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[code]....
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Feb 21, 2011
So, I'm trying to load resources, add them to a dictionary, and have a drawing method search through that dictionary and draw based on certain predicates. I have a function that iterates through an Vector of Strings, calling on an instance of Loader to load them instantiated as a URLRequest.
private function loadImages(urls:Vector.<String>):void
{
var loader:Loader = new Loader();
[Code].....
So the issue is: Only the first images in my Vector are drawing. Upon further inspection, I found that the completeHandler was only being called once (I put a trace in the complete handler to check). However, the Loader is invoking load everytime the loop iterates. I tried instantiating separate loaders for each resource, just to see if it would work, but I had no luck with that. Do I need to make separate loaders and event handlers? Or am I just not using Loader correctly?
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Oct 31, 2010
I am trying to make a simple mp3 player using flash. The songs are loaded using an XML file which contains the song list. The following code is inserted into a new keyframe.
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.events.*;
import flash.events.MouseEvent;
[code]...
The problem over here is in the nextSong() function. I am unable to preserve the value of currentIndex. Although I am incrementing currentIndex every time the function is called, but the value remains unchanged.
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Jun 29, 2010
Use Flash CS5 (and AIR, though this does not seem like it would be AIR related) in Win XP 64 I have a MovieClip symbol in my library with the identifier 'Puzzle10Piece10' with the following actionscript attached to frame 1 of the only layer with the following actionscript:
[Code]...
This runs contrary to my understanding of the pre-compiler and code execution order. In my way of thinking, any reference creation and related memory allocation is made when the object is instantiated, and indeed that allocation, unlike C depends not on code order (declaration before use), though this is an order that would satisfy even the C pre-compiler. If I understand the Flash compiler at all, it's not even a question of 'code order'... the symbol is pre-compiled such that for it to exist... for it to be instantiated, the variable would exist before the function would even be 'available' to be called internally or externally. Is my thinking way off, or is this a bug?
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Feb 14, 2011
i) Create a symbol called SimpleSquare. This should consist of a simple red square graphic
ii) Create a class file to define a class called SimpleSquare. This should be linked to the SimpleSquare symbol. SimpleSquare ashould have the following functionality: When the instance is placed on the Stage, it should start to disappear by decreasing its alpha at 0.01 in every frame (hint: alpha)
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May 22, 2009
Let's say I have a Custom Event Class, and it has several Event types stored in static Constant:
[Code]...
Is there an easy way to validate that the type passed to the Constructor is one of the Static Constants of the Class, without having to check it against each value?
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Aug 4, 2010
I'm using an AMF service that was built by someone else. Basically what happens is that some info is passed to the AMF service and it returns true or false.I want to be able to pass in various info to the a function that calls the AMF service(submitTracking) and then get the true or false value returned in onResultSubmit to be passed back to submitTracking.
var screen:String;
var buttonnumber:String;
function submitTracking(screen:String, buttonnumber:String) {
[code]....
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Dec 30, 2009
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I'm trying to determine if something is loaded or not and when it is I want it to run a function. If you take a look at the last part of my code you will see what I am trying to do. I am not in need of a preloader I just need to know when it is loaded so I can successfully apply a mask.
[Code]...
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Mar 10, 2011
i'd like to throw an argument error if a particular function doesn't work without a passed value that also happens to be a public constant of the class containing the function.is there anyway to determine if a class owns a public constant instead of having to iterate thru all of them? something like this:
public static const HALIFAX:String = "halifax";
public static const MONTREAL:String = "montreal";
public static const TORONTO:String = "toronto";[code]....
currently, for this functionality i have to write the city setter function like this:
public function set city(value:String):void
{
if (value != HALIFAX && value != MONTREAL && value != TORONTO)[code].....
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Apr 21, 2011
since the MXMLC compiler doesn't support mixed access modifiers for setters/getters, i would like to know whether a public setter function is being called from inside or outside of the setter's class. this approach should allow me to maintain a public property but with more security, something like public/private hybrid access. is it possible to use arguments' callee property, or perhaps something else, to determine whether the setter was set internally from the setter's class or if it was set externally?
[Code]////
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Oct 19, 2010
I'm writing an app where I want to know which, of an unspecified set of buttons, the user is clicking.The actual location of buttons determined by previous user actions, so I cant use information like mouseX.You can see from the code the way I'm attacking this - trying to access the button based on its position in the display list of a container. Unfortunately this has always led to type coercion errors 0 - AS can't see that e.target is a DisplayObject.se has solved this problem.
ActionScript Code:
import flash.display.DisplayObject;
import flash.display.Graphics;
[code].....
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Jun 2, 2011
Is there a method to see which event called a function and do something different based on that specific event?[code]...
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Aug 11, 2010
I got something like this:
var myClass:myClass = new myClass;
addChild(myClass.showLabel);
Then, inside this class there's this code:
[code]......
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Jan 28, 2011
For this example, I will use 2 classes, Entity and CSpawner. CSpawner is a children of Entity.I want to perform the following condition:if((new CSpawner()) is Entity)It works just like intended.But I want to do this test, without creating a new CSpawner object, something like this:if(CSpawner is Entity)But it doesn't work, because CSpawner is a Class.How do I perform that kind of conditional without creating a new CSpawner object?
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Jul 13, 2011
In Actionscript 3, if I'm given a Class object, is there any way to determine if that class extends from another given class? I don't want to instantiate the class to check it with the is keyword, though.
[Code]...
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May 11, 2011
I have this script for random letter cycling below. I want to call this function to happen at a certain click or frame label, but when I call it with tweenmax, I get a runtime error. Can anyone explain to me how to call this function at certain events. I know this is definitely not best practice but have to try somewhere and here is what I did:
var targetWord:String = 'home';
var wordSoFar:String = '';[code]....
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Mar 9, 2009
I am loading one xml file and onload (or onData) of this file I am calling another function but, this function is not getting called. What can be the issue? Can delegates be used here and how?
Here is the code for reference
Code:
//path for _global.bookXML is defined already.
_global.book_xml = new XML();
_global.book_xml.ignoreWhite = true;
[Code]....
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Dec 5, 2010
i want to use a DisplayObject to determine collides with hitTestObject function how to create a DisplayObject for BitmapData? so it knows totally transparent pixels are not collidable
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Apr 21, 2011
This is probably a silly question buy how do I find out if an Actionscript Object is just an Object ,but NOT any subclass IE String bool etc?[code]...
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Jan 21, 2009
The code that is commented out will work, however, I'm trying to turn that code, since it's used multiple times, into a function.
Why isn't my function working when it's being called?
ActionScript Code:
function displayInfo(_ROLL:MovieClip,_MC:MovieClip, _NN:MovieClip) {
_ROLL.onRollOver = function() {
[Code]......
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Jul 10, 2009
I've got a function 'fullReset' which resets the stage and places several movieclips (which are balls) back to a starting area. Within this function is a call to the 'unlockBallfunction within the Ball class (see bottom of code below).
ActionScript Code:
private function fullReset(event:Event):void
trace("RESET BUTTON HIT");
[code].....
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May 20, 2011
i have written one simple function, Now i want to do something like that:
Code:
if(function is called)
{
do something
}
so what will be the syntax for it?
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