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From: englfz@jetson.uh.edu
Newsgroups: comp.sys.mac.hypercard
Subject: Re: More Bkgnd Button ?s...
Message-ID: <6137.263eda29@jetson.uh.edu>
Date: 2 May 90 18:01:29 GMT
References: <7014@ur-cc.UUCP>
Organization: University of Houston
Lines: 45

In article <7014@ur-cc.UUCP>, jdic@uhura.cc.rochester.edu (Jonathan Dick) writes:
> A few articles back, I posted a question regarding hiding background buttons.
> Thanks to those of you who offered suggestions.  I've tried a couple of
> them, and while some succeeded, one did not.  A brief recap:
> 
>    I have these five navigation buttons that I use on every card in the
>    stack, except one.  One this one card, I'd like to hide & disable the
>    bkgnd buttons.
> 
> Most suggestions I received were along the lines of covering them with an
> opaque button that did nothing.  While this seems to work, it seems
> somewhat inelegant, so I tried the following suggestion in the card script:
> 
> on opencard
>   hide bkgnd button "Main Menu"
> end opencard
> 
> on closecard
>   show bkgnd button "Main Menu"
> end closecard
> 
> ....and a number of variations.  What happens is that the button hides just
> fine, but the show command is getting confused.  When I try to leave the
> card, I get a dialog box asking "Where is Background Button Main Menu?"
> 
> Does anyone know what causes this?
> 

Check to see if the command you are using is actually "Show".  The only time
I've come across the "Where is..." dialog box is when I use the "OPEN..."
command.  If you are inadvertently telling HyperCard to "Open button X",
HyperCard will think that "button X" is the name of a stack somewhere.  If
HyperCard couldn't find a hidden button, I believe you would get a message
like: "NEVER HEARD OF BACKGROUND BUTTON NAMED X".

If the problem doesn't lie in your code, the only suggestion I have is to
make sure that you are really still on the same background as the hidden
button.

Hope this helps!

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Ed Gibler                           University of Houston
ENGLFZ@uhvax1.uh.edu                English Computer Writing Lab
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