RE: [Isugamedev-midworld] still stuck on queue

[Brown J. L <Bro...@Jo...>]

>What if you did an observer pattern? Your object that creates the 5 other 
>objects can register itself as listeners to those 5 objects. When each of 
>the 5 objects generates somethings that needs to be added to the queue it 
>could fire off an event to all listeners. In this case, the listener would 
>be the object with the queue which would handle the event and add the 
>object to the queue.

Basically what I really need to do is have each of the 5 sub-objects own a
handle to their parent class that get's created when they are instantiated -
that way I can access the public methods of the parent class.  Is that how
the observer model works?

>
>Otherwise, if each subclass has it's OWN queue, just make the queue 
>protected in the base class and access it directly.
>
>As you can see, since the base class has the queue, I'm wondering why the 
>other 5 objects need to derive from the base class 

The 5 subclasses don't derive from a base class, they are seperate objects
contained in a class along with the queue, the super/parent class just
creates instances of them.

unless each object is 
>supposed to have its own queue.
>
>cheers,
-----
Ben Scott
Research Assistant VRAC
bs...@ia...


On Mon, 17 Jun 2002, Brown Joshua L wrote:

> hello I'm still stuck on the following problem:
> 
> If I have a class that instantiates 5 subclasses and 1 queue, and the 5
> sub-classes are supposed to push and pop elements on the queue, what is a
> good model for giving the subclasses access to the queue.
> 
> Do I need to have a constructor for each subclass that allows me to pass
in
> a queue - because that method really sucks.
> 
> j
> 
> Josh Brown
> Undergraduate - Iowa State University
> Research Intern - John Deere and Co
> 
> 
>