[gmpi] Re: ABI's / Nutshell

Jeff said: 
Hi Chris,

Just re-checked them, see nothing there that says a GUI instance isn't tied to a plug instance. Just what do you mean, and can you point me to a supporting req # please?

Req 76: GUIs are not part of a DSP plugin with private access to the DSP internals.

I didn't say it had to be part of the DSP side, nor that it had to have access to the internals of the DSP side, all I said was it made more sense to have the DSP side be where you go to get an instance of its GUI side. A GUI only has meaning in the sense that it corresponds to a DSP instance, is that not true? You do have to set up a link between the two anyhow, do you not?


Regarding the QueryInterface. Appologies if I seem rude. Just feel like everyone who joins the list has the same knee-jerk reaction to it.. proposes something 'simpler' (to them), but not really any better.

Apology accepted, and I hope you'll take mine as well for my probably equally rude seeming retort. Now what about the problem of populating menus etc. with plugs you can't know you can't use until you instantiate them? This is not a knee-jerk thing, this is an issue.

        -- Chris G.

Best Regards,
Jeff



  Is it for managing plug API version changes?
Yep.


Couldn't the factory or the metadata provide that more simply?


More simply than a single function?


It's not simple to go all the way through populating plug menus and instantiating a plug object, only to find out you can't use it because API versions don't match. Meantime memory's chewed and the user's irritated. The factory or metadata can know this, so we can head this off, so we must.

More robustly than a mechanism that returns NULL if the host doesn't support the plugin version?
More flexible than a mechanism whereby the plugin can choose to support say GMPI V1 and V3 but not V2?


if( !( iSupportGmpiApiVersion( yourFactory-->getGmpiApiVersion() ) ) { getRidOf( yourPlugDll ); }

What's complicated, unreliable, or inflexible about that?

Best Regards,

Jeff McClintock - explaining interfaces to the world... one person at a time. 


Same to you.

-- Chris G. - explaining doing what the job requires to the world... one person at a time 

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