Path: utzoo!attcan!uunet!decwrl!adobe!hawley
From: hawley@adobe.COM (Steve Hawley)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Query:  Double lines on default button...How?
Message-ID: <3486@adobe.UUCP>
Date: 3 Jul 90 15:19:16 GMT
References: <9883@odin.corp.sgi.com>
Reply-To: hawley@adobe.UUCP (Steve Hawley)
Organization: Adobe Systems Incorporated, Mountain View
Lines: 34

In article <9883@odin.corp.sgi.com> myoung@joker.sgi.com (Mark Young) writes:
>that describes how to make a button with the double lines that indicates
>the default selection.  I found a comment indicating that item #1 was the
>default selection, but my "ok" button, which is item #1 doesn't appear with
>the telltale double lines?
>
>any clues?

Bad news: The bold outline does NOT get drawn for you.  You must do that
yourself.

Inside Macintosh Volume I has some code to do that.  It boils down to getting
the bounding rect of the item, InsetRect(&boundingRect, -4, -4), PenSize(2, 2),
and then calling FrameRoundRect(...) to draw it.

The bad news is that you have to do the updates yourself.  This can be a real
pain in modeless dialog boxes, in particular.  Since this is likely to be
something you'll want to do fairly often, you may want to write a function
like "EmboldenButton()" that takes a ControlHandle as an argument and does
all the nitty-gritty.  The reason for using a ControlHandle instead of a
handle to a dialog item is that you can always get a ControlHandle from a
dialog item, but not the reverse.  Remember, you may want to call this from
another section of your code, say for use in a plain window not a dialog box.

To get around the update problem in dialog boxes, you may wish to define the
bold outline as a user item that draws itself around item #1.  Some people
implement this as a separate control definition as well.

Happy Trails.

Steve Hawley
hawley@adobe.com
-- 
"A blow on the head is... ...worth two in the bush." -Basil Fawlty