How can a inner class access an outer class?

Questions & Answers
1

class Test
{
var number : int;
var innerTestA : InnerTest;
var innerTestB : InnerTest;

	function Test()
	{
		number = 2;
		innerTestA = new ClassA(1);//<<Instantiation
		innerTestB = new ClassB(-1);//<<Instantiation
	}
	
	function activation(b : boolean)
	{
		if (b)
		{
			innerTestA.activate();
		}
		else
		{
			innerTestB.activate();
		}
	}
	
	class InnerTest
	{
		var adjust : int;
		function InnerTest(a : int)
		{
			adjust = a;
		}
		
		function activate()
		{
		}
	}
	
	class ClassA extends InnerTest
	{
		function ClassA(a : int)
		{
			super(a);
		}
		
		function activate()
		{
			number = number + adjust;
		}
	}
	
	class ClassB extends InnerTest
	{
		function ClassB(a : int)
		{
			super(a);
		}
		
		function activate()
		{
			number = 0;
		}
	}	
}

Gives the error:
Assets/Test.js(20,32): BCE0020: An instance of type ‘Test’ is required to access non static member ‘number’.

Please help.

2

There are several ways you can do this. One way is to scratch the whole “inner class” thing and instead have something like this:

class Test
{
	var number : int;
	var innerTest : InnerTest;

	function Test()
	{
	   number = 2;
	   innerTest = new InnerTest();
	}

	var InnerTest = function()
	{
	   var InnerTest = function() {}

	   var getNumber = function()
	   {
		 return number;
	   }
	}

}

var test = new Test();
var someNumber = test.innerTest.getNumber();

This is a bit confusing because here we are making an instance of a function, which is Javascripts version of “objects”.
Your other option is to have a variable in InnerTest that references the outer class:

class Test
{
	var number : int;
	var innerTest : InnerTest;

	function Test()
	{
	   number = 2;
	   innerTest = new InnerTest();   
	}

	class InnerTest
	{
        var outerClass : Test;

	    varr InnerTest = function(newOuterClass : Test)
        {
            outerClass = newOuterClass;
        }

	    var getNumber = function()
	    {
		return outerClass.number;
	    }
	}

}

var test = new Test();
var someNumber = test.innerTest.getNumber();

I don’t see the example that you gave as being a real world situation, so I am just assuming in my answer that you created that example for arguments sake.