Ok I will propose a new design soon and I want to have your comment on 
that.
The idea is to have

	Beeper beep
		calling the primitive if no Sound is available

	Beeper beep
		calling the cool sound when the sound system is available

SampleSound>>initialize
	could do

	Beeper setDefault: self beepSound

Stef

On Wednesday, May 14, 2003, at 03:20 AM, Andreas Raab wrote:

> Hi Stef,
>
> [#beep in SampledSound]
>> I defined beep on SampledSound to avoid to have hardcoded
>> reference and a class referring to its subclasses.
>
> While you are correct in general, I think that this solution is not 
> the best
> one in practice. What you're doing here is requiring SampledSound to be
> present in order to beep while one can very well argue that this 
> should be
> handled by FMSound or similar. So any one of the concrete subclasses 
> could
> take on the responsibilities for knowing how to beep.
>
> Considering this, I would claim that the "right" way of solving this 
> problem
> is to have a (probably class) variable which stores the sound to use. 
> So
> that one could use arbitrary sounds as the 'default beep sound'.
>
> Cheers,
>   - Andreas
>
>
>