minow@thundr.dec.com (Fortran for Precedent) (09/07/88)
As my first attempt to write a Macintosh application, I wrote a terminal
emulator. This has been a not altogether pleasant process as the Mac
lacks decent programming documentation. The program is working reasonably
well, and I'm stuck now trying too add a "Save Parameters" capability.
What I want to save are the Baud Rate (and similar options) and a set
of STR resources defining host names and telephone numbers. My design
is roughly as follows:
-- At startup, read the default values from the application resource file.
-- If the user selects "Load Parameters", load them from a selected file
and make it the current parameter file.
-- If the user selects "Save As", store the entire parameter database
in the selected file and make that the current parameter file.
-- If the user selects "Save", update the current parameter file.
Some of the things that go wrong include
-- The application resource file changes: how do I prevent this?
-- If I do multiple saves to the same file, I get multiple copies
of a particular resource. I want only one copy.
-- If I have a parameter file open and try to create a new file
("Save As"), things get written to the wrong file, or don't get
written to the correct file.
-- Sometimes the telephone number resources disappear!
Does anyone have a "cookbook" for this problem (I'm hardly the first
person to have faced it)? Mail to me will be summarized (with code)
to the net.
Thanks.
Martin Minow
minow%thundr.dec@decwrl.dec.com
...!decwrl!dec-rhea!dec-thundr!minow