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addInputPortWithType inside execute function?

Subject: addInputPortWithType inside execute function?
From: Julien Rigal <email@hidden>
Date: Mon, 25 Feb 2008 08:35:18 +0100
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Hello everyone,

I'm having trouble using the addInputPortWithType method inside the execute function of my QCPlugIn.

I'm making a plugin that needs to dynamically adapt the number of image and color input ports depending on the data it loads from a file. I've added a conditional loop to my plugin's execute function, but as soon a it's supposed to add a port, Quartz Composer throws an exception:

Error -[GLModelLoaderPlugIn addInputPortWithType:forKey:withAttributes:]: Inconsistent state.

I have the feeling I'm not supposed to be adding ports while rendering, but if that's so, how does one go about doing this sort of thing?

Regards,

Julien

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