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From: carolyn@cbmvax.UUCP
Newsgroups: comp.sys.amiga
Subject: Re: Question on PROP. gadgets using AUTOKNOB
Message-ID: <1469@cbmvax.cbmvax.cbm.UUCP>
Date: Thu, 26-Feb-87 10:30:16 EST
Article-I.D.: cbmvax.1469
Posted: Thu Feb 26 10:30:16 1987
Date-Received: Sat, 28-Feb-87 04:24:22 EST
References: <8702251843.AA10187@cory.Berkeley.EDU>
Reply-To: carolyn@cbmvax.UUCP (Carolyn Scheppner CATS)
Organization: Commodore Technology, West Chester, PA
Lines: 28

In article <8702251843.AA10187@cory.Berkeley.EDU> dillon@CORY.BERKELEY.EDU (Matt Dillon) writes:

>Everything works properly.  The question is: What should I do with the entry in
>the Gadget structure for the Image?  INTUITION crashes if I set it to NULL,
>but when I set it to some arbitrary image, it doesn't seem to affect the
>proportional gadget at all.
>
>In otherwords, no matter what I set the Image to, I get a normal rectangular
>border around my prop gadget.  Now, I *want* a normal border, but do not
>understand why I need a dummy image to make it all work.

   I don't have time to search through the source for the REASON, but it
is true that Intuition requires an Image structure for prop gadgets.
In the case of AUTOKNOB props, this Image structure need not be
initialized but your GadgetRender must point to it.

   This is stated in the Intuition manual (p.5-15 CBM, p.98 A/W).

   My guess is that Intuition stores current info about your AutoKnob
in the Image structure.  Just like it stores info about your gadgets
and menus in your structures.  

-- 
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Carolyn Scheppner -- CBM   >>Amiga Technical Support<<
                     UUCP  ...{allegra,caip,ihnp4,seismo}!cbmvax!carolyn 
                     PHONE 215-431-9180
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