Recursive iteration through every component instance

actionscript-3apache-flexmxml

I have various custom component instances in my flex app. I want to loop through them recursively and get their instance Ids. The recursive part is very important to me.
Can someone tell me what's the best way to do it?
I have tried doing this, but it didn't do recursive:

for each (var myItem:* in this.MasterContainer.childDescriptors)
{
   trace(myItem.id);
}

Best Answer

This will do it:

private function findControlsRecursive(current:DisplayObjectContainer, controls:ArrayCollection):void
{
    for(var idx:int = 0; idx < current.numChildren; idx++)
    {
        var child:DisplayObject = current.getChildAt(idx);
        controls.addItem(child.name);
        var childContainer:DisplayObjectContainer = child as DisplayObjectContainer;
        if(childContainer)
        {
            findControlsRecursive(childContainer, controls);
        }
    } 
}

public function findControls():ArrayCollection
{
    var controls:ArrayCollection = new ArrayCollection();
    findControlsRecursive(Application.application as DisplayObjectContainer, controls);
    return controls;
}

Related Solutions

Apache – Getting handles to dynamically-generated Flex components

Can you not just keep a list of your components in an array? Presumably you have an object reference when you create them and call addChild() on their parent. Why not just put them in an array at the same time?

var list_of_controls:Array = new Array();
var new_Object:<yourType>;

new_Object = new <yourType>();
parent.addChild(new_Object);
list_of_controls.push(new_Object);

then you can get at them...

var my_Object:<yourType>;
for each (my_Object in list_of_controls)
{
    // do something
}

You would have to make sure you dispose of them properly when you re done because the reference in your array would keep them in existence until cleared.

If you decide that you want to use getChildren() instead - which you could - take the time to read the documentation because I think it returns a new array with each call.

I hope that helps.

Best Answer

Related Solutions

Apache – Getting handles to dynamically-generated Flex components

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