FB II COMPILER
Create a faceless background application
A background app is an app that has the "background only" bit
in its SIZE resource set. It can't use any of the Toolbox initialization
calls except InitGraf. It has to respond to the 'quit' Apple event
(otherwise there is no way to get rid of it or to restart the
machine).
You can't use the full runtime for a background-only app, because
it automatically initializes all the Toolbox managers; you have
to use the mini-app scheme and call InitGraf yourself.
Mars
Thanks for your help. I tried using the mini-runtime, using CALL
INITGRAF(REGISTER(A5)-4) and setting the SIZE flag background
only to true. It's crashing every time. I'm not sure what I'm
doing wrong.
Could you elaborate on how the toolbox is initialized when using
background only apps? I didn't know all the managers would initialize
(besides QuickDraw) simply by virtue of "Background Only" being
set to true.
Aaron
I had to change the initializeApplication routine in the FB mini-app demo to:
LOCAL FN initializeApplication 'do this when the app starts up
%REGISTER(A4)+6,_STRresID 'get ID of STR# resource
CALL MOREMASTERS 'set aside some master pointers
CALL MOREMASTERS 'so they're low in the system heap
END FN
And as long as you don't try to do anything fancy you will be
OK. I can send you a simple shell if you still get stuck.
Jamin
When launching it, I'm getting a bus error with MacsBug telling
me _InvalMenuBar+00128. In theory,the Menu manager shouldn't be
initialized, but I see how it's crashing because I'm trying to
call toolbox routines that aren't there. Could I see your sample
shell? Thanks.
Aaron
I don't think the miniruntime sets up the QD record for you. I'd do it like this:
DIM myQD.QDGlobals
CALL INITGRAF(@myQD.thePort)
That should fix the crash.
<< Could you elaborate on how the toolbox is initialized when
using background only apps?. >>
They don't initialize, which is the entire point. You can't use
the Window Manager, Menu Manager, Dialog Manager, TextEdit, or
any of the MacOS interface calls in an FBA - there is no interface.
The only Toolbox interface manager that is safe to use in a faceless
background app is QuickDraw (since it's not exclusively for interfaces).
Mars