Question

I am trying to pass a variable “budget” from my DocumentClass of a flash file, to a class.

Currently I have :

(DocumentClassv5 , this is the code thats attached to the flash file in the properties panel, some code ommited)

package  
{

import flash.display.MovieClip;
import flash.utils.Timer;
import flash.events.TimerEvent;
import flash.events.*;
import flash.ui.Keyboard;
import flash.display.Stage;
import flash.text.TextFieldType;
import flash.media.Sound;
import flash.media.SoundChannel;    
import miniGameOne;
import floorTileMC;


import flash.display.Loader;
import flash.net.URLRequest;



public class DocumentClassv5 extends MovieClip 
{
    /*#################################
    ## Defining Variables            ##
    #################################*/

    public var budget:int = 0;

    var gameOne:miniGameOne = new miniGameOne();
        /*#################################
    ## Constructor                   ##
    #################################*/     
    public function DocumentClassv5() 
    {
        /*#################################
        ## Adding Event Listeners        ##
        #################################*/


        trace("Document class loaded");
    }
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

    /*###################################################
    ## Begins the mini game                            ##
    ###################################################*/           
    public function begin(evt: MouseEvent)
    {
        beginGame.visible = false;
        beginGame.removeEventListener(MouseEvent.CLICK, begin);
        budget = 500;

        cleanListeners();
        gameOne.loadGame();
        trace(gameOne.testVar);
        trace(floorTile.testVar2);

        /*#################################
        ## Adding Event Listeners        ##
        #################################*/         


        trace("Game started");
    }

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 
}

Then I have the miniGameOne class file, which at the moment does nothing

I also have another class file, called tileFloorMC. This is attached to a symbol.

package  
{

import flash.display.MovieClip;
import flash.events.MouseEvent;
import DocumentClassv5;


public class floorTileMC extends MovieClip 
{
    var propertyA:Number;
    //var hackerClass:DocumentClassv5 = new DocumentClassv5;
            public var testVar2:int = 50;

    public function floorTileMC() 
    {
        this.propertyA = randomRange(100, 500);

        this.addEventListener(MouseEvent.ROLL_OVER, manageMouseOver, false, 0, true);
        this.addEventListener(MouseEvent.ROLL_OUT, manageMouseOut, false, 0, true);
    }
    private function manageMouseOver(evt: MouseEvent)
    {
        this.gotoAndStop(2);
        //trace(mainClass.budget);
    }
    private function manageMouseOut(evt: MouseEvent)
    {
        this.gotoAndStop(1);
        //mainClass.budget += 1;
    }
    private function randomRange(minNum:Number, maxNum:Number):Number   
    {  
        return (Math.floor(Math.random() * (maxNum - minNum + 1)) + minNum);  
    }       

}

}

Now, essentially I will need to be able to pass budget from DocumentClassv5 TO floorTileMC, and then BACK to DocumentClassv5. At the moment, I can pass anything from floorTileMC and anything from miniGameOne into DocumentClassv5, but when i try and pass from floorTileMC to DocumentClassv5, I get error
Error #2136: The SWF file file:///yadayada/GameV5.swf contains invalid data.

More specifically, as soon as I uncomment //var hackerClass:DocumentClassv5 = new DocumentClassv5;

Any help would be greatly appreciated!

Thanks,

Tiffany

Answer 1

You’re trying to instantiate your document class in a subclass:

var hackerClass:DocumentClassv5 = new DocumentClassv5();

You want access to access the existing instance, not create a new one.

One thing you can do, is create a static reference to your document class. (see code sample below)

Static references can get ugly though, and you may just want to pass a reference of your doc class to your other classes when you instantiate them.

Both method below:

In your document class:

//instead of the line below:
var gameOne:miniGameOne = new miniGameOne(); //It's a bad idea to instantiate non primitive objects before the constructor of your document class runs.

//just declare it, and instantiate it in the constructor
var gameOne:miniGameOne;

//if you want to use a static reference:
public static var me:DocumentClassv5;

public function DocumentClassv5() 
{
    /*#################################
    ## Adding Event Listeners        ##
    #################################*/

    //if using the static var me, set it's value to this (the instance of the document class):
    me = this;


    trace("Document class loaded");
    gameOne = new miniGameOne(this); //pass a reference to the document class if NOT using the static var me


}

If using the static var me, you access it by doing the following from any class:

DocumentClassV5.me.budget;

Another cleaner alternative (if the values you need access to aren’t really directly tied to any class, eg. global preferences), is make a whole new class that is just static (doesn’t get instantiated) to hold your preferences.

package {
    public class Global {

        public static var budget:Number = 50;

    }
}

Then you’d access budget by importing your Global class and doing Global.budget = 5