How to send a variable from one class to another?

Question

hello,
i have "One.as", which is the document class for one.swf.
i also have "two.swf", with "Two.swf" entered as its document
class...
One loads two into it. two is basically a 10 frame movieClip
with a variable at the beginning called "var endFrame:Boolean =
false", then on the last frame it says endFrame = true.
my question: how in the world do I communicate this back to
One.as??? i've tried ENTER_FRAME listeners, declaring the variable
here and there... and many other embarrassingly usuccessful
strategies.
i would just like to load in "three.swf" after two.swf
finishes... but One needs to know that it has indeed finished.
your help would be greatly appreciated. thanks

Answer 1

yarkehsiow,
> David,
> thank you for responding.
Sure thing! :)
> so does what you are saying mean that endFrame is a
property of
> two (the movieClip), or Two (the Class)?
If you've written a property named endFrame for your Two
class, then
yes, Two.endFrame is a property of that class.
Looking back at your original post, I see that you wrote
this:
> One loads two into it. two is basically a 10 frame
movieClip
> with a variable at the beginning called "var
endFrame:Boolean = false",
> then on the last frame it says endFrame = true.
So it sounds like your Two class extends MovieClip. (I'm not
sure
that's true, but that's what it sounds like.) That means your
Two class
supports all the features of the MovieClip class, including a
play() method,
a currentFrame property, and so on. In addition, you've added
new
functionality that amounts to -- by the sound of it -- a
property named
endFrame. If you made your property public (i.e., public var
endFrame),
then it should be accessible by way of an object reference to
your Two
instance.
myTwoInstance.endFrame;
> so can i invoke that method in One.as? do I call it
Two.endFrame (if
> (Two.endFrame == true) {?
Methods are things an object can *do,* such as
gotoAndPlay(). What
you're describing is a property (a characteristic ... in this
case, a
Boolean characteristic). You wouldn't use the expression
Two.endFrame
unless that property was static. Static classes are those
that cannot have
an instance made of them. Think of the Math class. It
contains numerous
static properties in the form of constants, such as Math.PI,
Math.E,
Math.SQRT2, and so on. You can't create an instance of the
Math class -- it
wouldn't make sense to -- so Math is a static class.
On the other hand, you definitely create instances of the
MovieClip
class. Every movie clip symbol is an instance of MovieClip
class, which
means that each instance carries its own unique values for
MovieClip class
members. The MovieClip class defines x and y properties, but
each movie
clip symbol (that is, each instance of the MovieClip class)
configures its
own values of those properties, depending on where each
instance is located
on the Stage.
Assuming your Two class is not static, then somewhere along
the line,
your One class will have to make an instance of it. Somethine
like ...
// inside your One class ...
var myTwo:Two = new Two();
... at which point that myTwo variable because a reference to
that
particular instance of Two. You can invoke Two methods on
that instance.
You can invoke Two properties and events on that instance.
You can invoke
whatever functionality is defined by the Two class on that
myTwo instance.
If Two extends MovieClip, that means you can also invoke any
MovieClip class
member on that myTwo instance.
At some point in your One class, you can refer to that myTwo
instance
later and check if the value of myTwo.endFrame is true or
false.
David Stiller
Adobe Community Expert
Dev blog,
http://www.quip.net/blog/
"Luck is the residue of good design."