ActionScript 3.0 :: Singleton Versus Normal/global Variable?
Jun 11, 2011
WHY would I use this pattern to hold variables accessible to other swfs throughout the project when I can just keep them in the container movie and access them as desired.Is there any advantage like optimization, security, ease of use etc..how I access a varibale in a parent mc unless answered here too as it is in the same category.Is it best to access a varibale in the parent using
1. MovieClip(parent.parent).variableTargeted OR import com.parentAsDocument; And then access the variable
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May 29, 2009
pros and cons of either using a Singleton that enforces only one instantiation of itself, versus creating one common class with static vars which can be accessed by all other classes that import it?
In my testing, importing but never instantiating works fine. I can even change the value of one of the variables and then have another class see that changed value later on in the program.
If I *know* I will never actually create an instance of my Global class using the New command (but will instead just reference the variables using the class's name), then why should I need to make it a strict Singleton?
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Jun 9, 2009
In Flash, if I Test Movie in normal mode (Ctr + Enter) I get no complaints about accessing URLs. The SWF's sandbox is "localTrusted". However when I debug Test Movie (Ctr + Shift + Enter), the sandbox is different. I then get complaints about accessing URLs; Security Sandbox Violation "...Untrusted local SWFs may not contact the Internet..." if localWithFile, and "...denied due to lack of policy file permissions..." if localWithNetwork.
Is this a "feature"? If so, I'd like to be able to turn it off. It would be nice if there was simply a warning, and not actual failure. To fix it, I could trust the file using global trust settings, but that seems silly just for debugging.
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Jun 22, 2009
I'm building an object oriented project with liquid layout in a loose MVC framework. My controller knows when the stage is resized, and it needs a way to tell all of the display objects to rearrange themselves appropriately when the stage resizes.
Option 1 would be extending the sprite class with a class that has one additional resize() function. On initializing the class it would register itself with the controller which would then noitfy all of the assets when it detects a stage resize.
Option 2 would be building some sort of global event that any child of the stage could listen for and do its thing when the event comes through.
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Jul 22, 2009
i defined the global variable in the first frame of my file, and i can access it on other frames, however i am trying to access it within a movieclip, and flash is telling me that it is undefined. does anyone know why this could be?
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Nov 3, 2010
How can I access a timeline variable from a static class / singleton?
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Feb 8, 2010
I have 2 movie clips, one being loaded into a container MC via "loadMovie();"In the main movie there is a variable with no value, in the external movie there are 5 frames, each with a value to update the variable in the main movie.
IE: if on frame 1, global value = 1 / if on frame 2, global value = 2 / etc etc I'm familiar with passing variables INTO an external swf, but am stumped on how to do it the reverse way.
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Nov 17, 2009
Is this possible?, it evaluates to false, and I need that evaluates to true
This are my variables:
_root.compTecSelec1="Dominio del idioma ingl�s";
_root.compTecSelec2="Manejo de hornos";
[code]......
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Mar 1, 2011
how to define global variable in fms so that it can be accesses by different application instance of same application,
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Feb 28, 2012
I'm trying to get a value from a function which is a URLLoader COMPLETE event but even with declaring variables outside of the function will not allow me to get the value out. I'm stuck.It seems that the Asynchronous nature of Flash makes it impossible to get a value out: e.g. this works:
// Initialise a URLLoader to get XML data from XML file
var myFPBLoader:URLLoader = new URLLoader();
myFPBLoader.load(new URLRequest("flightPlannerBoard.xml"));
[code]...
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Aug 11, 2009
I have a movieclip on the stage, and in that clip I have a button that is supposed to turn a global variable from true to false, but the compile tells me:
1119: Access of possibly undefined property root through a reference with static type Class.
When I use this code:
Code:
function closeMSN(event:MouseEvent):void{
this.visible = false
Stage.MSNOpen = false
}
I know how to reference the movieclip itself by this, but how do I change the value of a variable on the main stage, from inside the movie clip?
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Jun 23, 2009
i've declared global variable in the first frame of the main timeline:var cLabel:String;In the inner timeline of a MC, i use this code:stop();cLabel=this.currentLabel;but flash gave me error 1120: access of undefined property
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Aug 24, 2009
I'm having an issue with a global variable. I'm trying to give it a value within a function and it isn't working.The variable is imageList. It's an XML List. I'm making it global so I can use it anywhere in my project. I suppose if someone has a better idea to avoid the global variable, I'm up for that too. But for now, it seems like the way to go.
Here's my .as file:
package
{
public class MyGlobal
{
[code]....
It's giving me the same same Error #1009 as above. It seems like a scope problem, but why? Shouldn't it work since it's a global variable?
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Jan 8, 2010
I am trying to set up a global variable. On the root of my timeline, I have this;
_global.floorVar = "0";
trace(floorVar);
which seems to trace fine to say 0.
Then, inside of a movie clip on the main timeline, I have a button function:
floor1.onRelease = function() { _global.floorVar = "1"; trace(_global.floorVar) _root.gotoAndStop(2);};
if (_global.floorVar == 1) { trace("it works");
}
It traces as 1 once I press the button, but the if statement doesn't trace "it works" is my global variable set up wrong?
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Jan 21, 2011
var frName = fruit_txt.text;
disp_btn.addEventListener(MouseEvent.CLICK, disp_fruit);
function disp_fruit(Event:MouseEvent)[code]....
defining the variable i:e frName.... outside the function it does not display anything..same time if I define same variable inside function i:e disp_fruit...it displays the name ]why?
and how can i use variable i:e frName as global var so that it can be used in any function?
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Feb 1, 2011
I have a stackview of textfields and when I type into the text field I want it to update on each stackview "page", kind of like a global variable, maybe even using a global variable.
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Jul 21, 2009
Can I bring in a variable (saved in a text file) using LoadVars and then make that variable accessible from anywhere in the script (i.e. make the variable a global)?
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Jan 10, 2010
how do I make a global variable that can be recognized in all frames?
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Nov 4, 2003
I have a button in a movie that I want to set a global variable to a new value when clicked. I want it to access a parameter of a movie clip that this same button loads onto the movie for the new global variable value. I have the final line under this button's onrelease script with something like this:
globalvariable1 = movieclip.parameter; Everything is on level 0 and I've tried prefixing everything with _root. but it didn't make a difference, the global variable still wasn't changed. I'm a newbie so don't laugh if this is a really dumb question!
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Jul 16, 2004
here is the set up. I'm working with three files. Main.swf which contains navigation.swf in a blankmc, empty mc called mcContent where navigation sleclected materials are loaded.
In the navigation.fla here is the code
[AS]trace("now defining global");
_global.loadFile_str = strPicName;
[code]......
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Oct 21, 2004
I want to load an external .swf into my main .swf, it will contain a textfield. However, in order for it to know what to put in that text field, it must pick up on a variable main.swf_global.USERENTRY now in order for my mc user_output to display _global.USERENTRY, what must I do?
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Feb 24, 2003
I am trying to use the global variable declaration. Up to know I've been using the x coordinate of a movie clip to pass variables between different movies, and I thought it was time to learn properly! Just to get it to work, I am trying a flash file with two movies in the root. One movie defines a glabal variable on load;
_global.numb = 6;
And then I am trying to just get the other to trace it on enter frame, so the code attached to the other movie (on enterframe) is...
trace(numb);
(And I tried trace(_global.numb) as well, but I was under the impression that you only had to define it as being a property once.). All that happens when I run the movie is nothing is traced.
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Aug 19, 2005
I've been trying for a while to set a global variable from an xml file within a function and then be able to use it in another function.
[Code]...
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Mar 17, 2006
I'm having a problem changing the value of a global variable.
I'm using the xml photogallery thats available on Kirupa. I have 2 movies on the main timeline: the galley movieclip and a navigation movie clip. I want the buttons in the navigation clip to change the global varable 'section' and this to be passed to the galley xml load function. So far i have this for the button:
Code:
gallery1button.onRelease = function(){
_root.nav.select(0);
_global.section= "gallery1";
};
I am using php to deliver the xml data dynamically to flash so I only have one xml file for several galley section. the AS looks like this:
Code:
xmlData.load("photos_xml.php?section="+_global.section);
It doesnt seem to be working though.
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Jun 26, 2008
I've set up a multi-lingual fla now where you select your language with a button on the first frame and that loads in the equivalent xml file. Now Later in my swf I'm trying to load in another swf with loadMovie but I'd like to assign conditional statements to determine what xml is loaded.for code thus far I have
//first frame
var myXML:XML = new XML();
myXML.ignoreWhite = true;
loadXMLfunc.onLoad = function(ok:Boolean):Void {
[code]....
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Feb 28, 2010
I define a global variable in a swf and then launch a child window which will alter the value of the global variable and I want the parent to detect that event and take specific action. How should I go about this? Can global variables launch events?
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Aug 11, 2011
I am trying to declare a global variable, a variable that will be recognized throughout the entire site. Then I am checking for that variable with a function inside of a movieClip, that is inside of another movieClip.[code]...
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Oct 21, 2004
I want to load an external .swf into my main .swf, it will contain a textfield. However, in order for it to know what to put in that text field, it must pick up on a variable. main.swf_global.USERENTRY now in order for my mc user_output to display _global.USERENTRY, what must I do?
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Nov 9, 2009
I've got a Global variable here in my flash project, which is stated like this,
_global.swfloaded = "home";
This variable then changes throughout the project, depending on what buttons are pushed. One example of the change is when a button labelled Classic is clicked, taking the user to the Classic page, the variable is changed like this -
swfloaded = "classic";
I then have a dynamic text field with the instance name of 'output' on the stage, which I want to display the variable, the code I've used for that is -
output.text = swfloaded;
The problem is the 'output' field doesn't update at all, no matter what is clicked. How I can quickly and easily get the field to update when the global variable itself is changed.
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Feb 22, 2010
I can then access it and get to to trace from anywhere like this:[code]However...I need to to go into something being converted to a string...like this...txt.load("xml/january/1.xml");Where the Janauary is replaced with the global variable. However, everything inside the quotations is being converted to strictly text, so that txt.load("xml/monthvariable/1.xml");Literally looks for the "monthvariable" folder instead of the January Folder. How can I put a variable into a string like this, so the variable is actually the variable and not the strict text?
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