Singletons (was: Re: [squeak-dev] TheWorldMainDockingBar instance)
Levente Uzonyi
leves at elte.hu
Sat Nov 6 05:58:53 UTC 2010
On Sat, 6 Nov 2010, Hannes Hirzel wrote:
> Hello
>
> The TheWorldMainDockingBar is implemented as a Singleton.
>
> To access the sole instance the method #instance is used. But we have
> 35 implementor of #default and 20 implementors of #current for
> implementing Singletons.
There's also #soleInstance and probably a few more. Some people like this,
others like that.
Also some singletons are implemented with a class variable, others use
class instance variables.
>
> Could somebody please change this the next time?
You? :)
Levente
>
> And TheWorldMainDockingBar is hard coded 5 places
>
> One thing we could do is to add the method
>
> mainDockingBarClass
> ^TheWorldMainDockingBar
>
> to MorphicProject
>
> and then replace the hard coded
>
> TheWorldMainDockingBar
>
> with
>
> MorphicProject current mainDockingBarClass
>
>
> This is still hard coded but now offers the option that if I subclass
> MorphicProject I can have another menu there.
>
> What do you think?
>
> Hannes
>
>
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