Hi,
You can't decorate a UIComponent since it is a DisplayObject and needs to be
added to the display list.
You have to either us composition or subclass Button and use an interface
and pass the class to decorate the Button with.
<JuiceMaker id="myJuiceMaker" decorator="{JuiceMaster}" click="
myJuiceMaker.makeJuice('orange')" />
class JuiceMaster
implemented IJuiceMaker
{
public function makeJuice(type:String):void
{
trace("Happily making", type, "juice!", "Tralalala!");
}
}
public class JuiceMaker
extends Button
implemented IJuiceMaker
{
private var _makerClass:Class;
private var makerImpl:IJuiceMaster;
public function set makerClass(value:Class):void
{
_makerClass = value;
makerImpl = new _makerClass();
}
public function set makerClass():Class
{
return makerImpl;
}
public function JuiceMaker()
{
super();
}
public function makeJuice(type:String):void
{
if (makerImpl is IJuiceMaker)
makerImpl.makeJuice(type);
}
}
public interface IJuiceMaker
{
function makeJuice(type:String):void;
}
The above is something that would help what you are trying to achieve with
display object.
You could also drop the interfaces and use concrete types but hey, if your
asking about decorators, your asking about design patterns. ;-)
Peace, Mike
On 9/12/07, Claudia Barnal <[EMAIL PROTECTED]> wrote:
>
> I believe I might be missing something with the Decorator Pattern.
> I've tried to get a simple example to work, but I get too mixed up
> with all the abstracts and what not.
>
> Here's what I'm trying to do:
>
> Extend a Button and add some functionality to it gotten from another
> class (non visual). From what I can understand, this is what the
> Decorator Pattern is for.
>
> In pseudo code this is the basic functionality I want:
>
> class JuiceMaster
> {
> public function makeJuice(type:String):void
> {
> trace("Happily making", type, "juice!", "Tralalala!");
> }
> }
>
> class JuiceMaker extends Button
> {
> public function JuiceMaker()
> {
> Super();
> makeJuice("apple");
> }
> }
>
> And in MXML, I should be able to do something like this:
>
> <JuiceMaker id="myJuiceMaker" click="myJuiceMaker.makeJuice('orange')" />
>
> Of course this example isn't going into any detail, and doesn't make
> much sense, but this is somewhat my need.
>
> Any explicit explanation on how to get something like this to work
> with the Decorator Pattern is greatly appreciated.
>
> Thanks!
>
>
--
Teoti Graphix
http://www.teotigraphix.com
Blog - Flex2Components
http://www.flex2components.com
You can find more by solving the problem then by 'asking the question'.
