Question

I’m no code genius, but a fan of action script.
Can you help me on this:

I have a function that depending on the object selected, will call event listeners to a set of ‘sub-items’ that are already on stage (I want to reuse this subitems with changed parameters upon click, instead of creating several instances and several code).

So for each selected ‘case’ I have to pass diferent variables to those ‘sub-items’, like this:

function fooMenu(event:MouseEvent):void {
    switch (event.currentTarget.name)
    {
        case "btUa1" :
            trace(event.currentTarget.name);
            // a bunch of code goes here
            //(just cleaned to easy the view)
            /*
            HELP HERE <--
            here is a way to pass the variables to those subitems
            */

            break;
    }
}

function fooSub(event:MouseEvent):void
{
    trace(event.target.data);
    trace(event.currentTarget.name);
    // HELP PLEASE <-> How can I access the variables that I need here ?
}

btUa1.addEventListener(MouseEvent.CLICK, fooMenu);
btUa2.addEventListener(MouseEvent.CLICK, fooMenu);

btTextos.addEventListener(MouseEvent.CLICK, fooSub);
btLegislacao.addEventListener(MouseEvent.CLICK, fooSub);

Anyone to help me please?
Thank very much in advance. 🙂

Answer 1

(I’m not sure I got your question right, and I haven’t developed in AS3 for a while.)

If you want to simply create function with parameters which will be called upon a click (or other event) you can simply use this:

btUa1.addEventListener(MouseEvent.CLICK, function() {
  fooMenu(parameters);
});

btUa2.addEventListener(MouseEvent.CLICK, function() {
  fooMenu(other_parameters)
}):

public function fooMenu(...rest):void {
  for(var i:uint = 0; i < rest.length; i++)
  {
     // creating elements
  }
}

If you want to call event listeners assigned to something else you can use DispatchEvent

btnTextos.dispatchEvent(new MouseEvent(MouseEvent.CLICK))

---

Remember, you can’t use btTextos.addEventListener(MouseEvent.CLICK, carregaConteudo(“jocasta”)); because the 2nd parameter you pass while adding Eventlistener will be considered as function itself – there are two proper ways to use addEventListener:

1:

function doSomething(event:MouseEvent):void
{
  // function code
}
element.addEventListener(MouseEvent.CLICK, doSomething); //notice no brackets

2:

element.addEventListener(MouseEvent.CLICK, function() { // function code });

So:

function fooSub(event:MouseEvent, bla:String):void 
{ 
trace(event.currentTarget.name+" - "+bla); 
// bla would be a clip name. 
} 

codebtTextos.addEventListener(MouseEvent.CLICK, function(e:MouseEvent) { fooSub(e, "jocasta") } ); 

---

Or try something like this if you want content to be dynamically generated:

btUa1.addEventListener(MouseEvent.CLICK, function() {
    createMenu(1);
});

btUa2.addEventListener(MouseEvent.CLICK, function() {
    createMenu(2);
});

function createMenu(id):void
{
    // Switching submenu elements
    switch (id)
    {
        case 1:
            createSubmenu([myFunc1, myFunc2, myFunc3]); // dynamically creating submenus in case you need more of them than u already have
            break;
        case 2:
            createSubmenu([myFunc4, myFunc5, myFunc6, myFunc7]);
            break;
        default:
            [ and so on ..]
    }
}

function createSubmenu(...rest):void {
    for (var i:uint = 0; i < rest.length; i++) 
    {
        var mc:SubItem = new SubItem(); // Subitem should be an MovieClip in library exported for ActionScript
        mc.addEventListener(MouseEvent.CLICK, rest[i] as function)
        mc.x = i * 100;
        mc.y = 0;
        this.addChild(mc);
    }
}