Thanks a lot Michael! One never stops learning.
I'll be using this stuff from now on, but I still have one question about
all this (sorry to take your time).
In your first post, you wrote this:
"You can't decorate a UIComponent since it is a DisplayObject and needs to
be added to the display list."
1. Why does the Decorator become limited because the UIComponent needs to be
added to the display list?
Thanks!
On 9/12/07, Michael Schmalle <[EMAIL PROTECTED]> wrote:
>
> arrg, I'm doing to many things today..
>
> in the construct that would be
>
> makerImpl = new JuiceMaster();
>
> instead of;
>
> makerImpl = new JuiceMaker();
>
> I'm sure you knew that but, I'm just a perfectionist even with irrelevant
> emails. :)
>
> Mike
>
>
> On 9/12/07, Michael Schmalle <[EMAIL PROTECTED]> wrote:
> >
> > Hi,
> >
> > below is the 'concrete' version;
> >
> >
> > class JuiceMaster
> > {
> > public function makeJuice(type:String):void
> > {
> > trace("Happily making", type, "juice!", "Tralalala!");
> > }
> > }
> >
> > public class JuiceMaker
> > extends Button
> > {
> >
> > private var _makerClass:Class;
> > private var makerImpl:JuiceMaster;
> >
> > public function set makerClass(value:Class):void
> > {
> > _makerClass = value;
> > makerImpl = new _makerClass();
> > }
> >
> > public function set makerClass():Class
> > {
> > return makerImpl;
> > }
> >
> > public function JuiceMaker()
> > {
> > super();
> >
> > // you could just make the default implementation here
> > // thats about as concrete as it gets
> > makerImpl = new JuiceMaker();
> > }
> >
> > public function makeJuice(type:String):void
> > {
> > if (makerImpl is JuiceMaster)
> > makerImpl.makeJuice(type);
> > }
> > }
> >
> >
> > Notice the types are concrete meaning you are programming to an
> > implemented class, no polymorphism here.
> >
> > And note this is not 'real' decoration either.
> >
> > Real decoration means you pass a reference to an instance of the
> > decorator and actually call the decorators methods.
> >
> > This is like Composition Decorating, and maybe there is some other OO
> > word for it. I don't care about the technical of it just that it IS a
> > pattern good for DisplayObjects.
> >
> > Peace, Mike
> >
> > On 9/12/07, Claudia Barnal < [EMAIL PROTECTED]> wrote:
> > >
> > > Yeah, I had thought about something using composition. But somewhere
> > > I had read that the Decorator was what I needed :(
> > >
> > > I'll do it as you mentioned, but I would still love to hear about the
> > > Concrete class that you mention :)
> > >
> > > Thanks Michael!
> > >
> > > On 9/12/07, Michael Schmalle < [EMAIL PROTECTED]> wrote:
> > >
> > > > Oh yeah
> > > >
> > > > <JuiceMaker id="myJuiceMaker" decorator="{JuiceMaster}" click="
> > > > myJuiceMaker.makeJuice('orange')" />
> > > >
> > > > is supposed to be;
> > > >
> > > > <JuiceMaker id="myJuiceMaker" makerClass="{JuiceMaster}" click="
> > > > myJuiceMaker.makeJuice('orange')" />
> > > >
> > > >
> > > > On 9/12/07, Michael Schmalle <[EMAIL PROTECTED]> wrote:
> > > >
> > > > > 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'.
> > > >
> > > >
> > > >
> > > >
> > > > --
> > > > 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'.
> > > >
> > > >
> > >
> >
> >
> > --
> > 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'.
> >
>
>
>
> --
> 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'.
>
>
>
