Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!oakhill!tomj
From: tomj@oakhill.UUCP (Tom Johnson)
Newsgroups: comp.sys.mac.programmer
Subject: Chooser Interface Problem (kind of long)
Summary: Is IM-IV Hosed?
Keywords: Chooser RDEV
Message-ID: <2094@oakhill.UUCP>
Date: 5 Jun 89 19:46:47 GMT
Reply-To: tomj@oakhill.UUCP (Tom Johnson)
Distribution: usa
Organization: Motorola Inc., Austin Tx.
Lines: 63

I'm having a little problem writing an RDEV.  As an (almost) last resort
prior to tearing my hair out and becoming a Buddist monk, I though I might
see whether anyone out in netland has a solution.

Scenario:
  RDEV which issues its own NBP call to fill a list.

RDEV Header info as per IM-IV (pg. 217):
 0 - BRA.s to offset $10
 2 - Device ID word (0)
 4 - 'PACK' long word
 8 - $F000 (-4096)
 A - Version word (1)
 C - Flags long word (see below)
10 - Start of driver code

Flag long word = 9D008800
  (AppleTalk device, multiple instances allowed, uses left & right buttons,
   doesn't use radio buttons, saves zone names, uses actual zone name,
   no initMsg, no newSel msg, uses fillList msg, no getSel msg, no select msg,
   no deselect msg, uses terminate msg)

Resources:
   'PACK' -4096 (the header described above + code)
   'STR ' -4096 (Type name = "NetAlert")
   'GNRL' -4096 ($0803 = timeout/retry info for NBP call)
   'STR ' -4093 (Left Button title)
   'STR ' -4092 (Right Button title)
   'STR ' -4091 (List label)
   'STR ' -4090 (empty string - for chooser's use)
   'BNDL' -4065 (bundle info)

The Problem:
  Regardless of the setting of the flags long word, the code NEVER receives
a "fillList" message as per IM-IV p.220, and ALWAYS receives a getSel msg!

I have tries removing the STR -4096 resource and the GNRL -4096 resource.
Under these circumstances, the chooser STILL insists in filling the list
for me, and thinks I want the names of the LaserWriters!  I tried clearing
the AppleTalk device bit in the flags long word...still get GetSel messages,
and STILL getting list filled for me.

Question:
  How in the H**L do I get Chooser to 1) NOT send me getSel messages and send
me a fillList message instead?  2) NOT issue the NBP call for me?

There is a questionable passage in IM-IV p.218 where it says:
"When the Chooser sends the fillList message, the device package should fill
a List Manager list **FILLED WITH CHOICES FOR A PARTICULAR DEVICE**..."
(emphasis is mine).  What does this mean exactly?

On page 220, IM says (point 4 after icon selection):
"If the device accepts fillList messages, the Chooser calls the device package
which should fill column 0 of the list pointed to by p1 (actually a handle)..."
This NEVER occurs?  Why?

HHHHHHHEEEEEEELLLLLLLPPPPPP!!!!!!!!!!

p.s. I am writing this thing in assembly.  Everything works except for the
missing FillList call.  I decided to add this since there is a limit on
the number of tuples which the default NBP call will handle (15 I think).

tomj