Actionscript 3 :: Communication Across Different Classes?
Apr 1, 2010
I always have the trouble that make different classes communicate with each other.
1. using get set methods
2. eventdispatch to dispatch custom event.
Today, I am working on this confused issue again. I still can't get through it.this time what I wanna do is this: I wanna use a button (_zoom) to control a mc (_board) located in different class. Let's me give a simple structure for you:
ProjectAppear.as
|_ _board (mc)
|_ Project.as
|_ _work (mc)
|_ _zoom (mc)
My thought is I add a mouse event listener for _zoom, and then when mouse click it will dispatch a custom event..
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Feb 21, 2008
Im building my first OOP project with classes in AS3, Ive done a lot of tutorials and Im grasping the concepts well. Im just having trouble with the concept of communicating between classes. Whats the best way for a class to talk back to its parent once its instantiated? It seems when your inside a class, you're kinda stuck there as far as scope goes? ie one way street. Or am i missing something? Im used to the days where I was coding on the timeline and could just use this._parent etc. But obviously those days are gone.Or should I not need worry about this If I have planned the structure/heirachy correctly?
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Apr 16, 2009
I had a question on OOP and the best practice for how to communicate between classes. If I have a class (SiblingA) where some one clicks something in it and you need to interact with another Class (SiblingB), what is the best method for doing this?
(option1) Should I have a bunch of event listeners in the Document Class that respond to these events? (I thought you wanted a document class to be as small as possible). (option2) Or should I create a separate 'Utility' class that speaks with both siblings to facilitate communication (event handling) between the two (one class with many public static methods). I have attached a diagram to try and help explain this.
Often times these events are dispatched from children of children in sibling classes (ie childOfSiblingA or even its children) Option1 Scenario: A user does something in SiblingA, that dispatches an event to the doc class which listens for it, fires its listener function which calls a (public) method in SiblingB to handle the interaction.
Option2 Scenario: A user does something in SiblingA which calls a (public static) function in Utility class which calls a (public) function in SiblingB to handle the interaction.
I think I am leaning towards option 1 but that would be a lot of dispatching events (child dispatches to parent, dispatches to its parent, dispatches to doc, doc calls child, which calls its child, which... finally does something)
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Jul 19, 2011
I need to know how to reference variables in other classes. I have been avoiding this by referencing variables from the Main class, where they are created. But at this point I would like to be able to have the option and it would make me a better programmer.
Say I create a movieclip in the Main.as
Code:
public var Enemy_mc:Enemy = new Enemy();
addChild(Enemy_mc);
[Code].....
How do I do that^ without creating a variable in Main.as and having it check Background.as for variable updates?
Can I do something like "Main.Enemy_mc += 5;" like I can do in Main.as to variables that I have created in Main in other classes?
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Jun 2, 2009
I don't know how to phrase this, but as you can see my code below I have 2 classes.
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2. wp_date
How can I let wp_date to get the height of wp_title's contentText? Currently I tried tracing wp_title.height from wp_date but all I get was 0, I guess it doesn't get the height after wp_title finish loaded. Currently the classes will perform an action after I resize the stage. I assume if I'm able to get the classes to communicate with each other than I could have 1 main classes to control the actions perform in other class?
Code:
package {
import flash.display.Sprite;
import flash.display.Stage;
import flash.display.StageScaleMode;
import flash.events.Event;
[Code] .....
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[Code]....
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The examples I'll use don't do anything - they're classes without ANY members - no variables, methods, anything.
Let's say I extends Sprite and call it MySprite.
I save it in test.core
[code]...
Now I create another custom class called MyWindow that extends MySprite.
I save it in test.windows
[code]...
Then I create another class that extends MyWindows (the example I'll use is a document class - but that doesn't matter - I've tested using an instance too).
[code]...
Notice that I'm not even trying to instantiate the helper classes - just having them there throws the error.
If there is only a single helper class, everything runs fine.
Also note that - as far as I can tell - this only happens when extending one class from another package, then extending that class with more than one helper object.I'm pretty sure there's no namespace bumps or typographical errors, as this is a very pared-down version of the original application.
EDIT: seems the problem exists even without the crossing packages - even extending MySprite in the document class with multiple internal classes generates this error.
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[code]....
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