Have you a sample of source program wrote in C or C++ to begin my
application
Thanks by advance
Didier Leclerc
DLP AUTOMATISMES
2 mail les Cerclades
95031 CERGY PONTOISE CEDEX
Tel :+33.1.30 32 39 04
Fax :+33.1.30 32 37 75
e-mail : [EMAIL PROTECTED]
----- Original Message -----
From: "didier.leclerc.dlp" <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[email protected]>
Sent: Tuesday, July 19, 2005 11:22 AM
Subject: Question on palm os developper suite
Have you a sample of source program wrote in C or C++ to begin my
application
Thanks by advance
Didier Leclerc
DLP AUTOMATISMES
2 mail les Cerclades
95031 CERGY PONTOISE CEDEX
Tel :+33.1.30 32 39 04
Fax :+33.1.30 32 37 75
e-mail : [EMAIL PROTECTED]
----- Original Message -----
From: "Chris Tutty" <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[email protected]>
Sent: Tuesday, July 19, 2005 11:16 AM
Subject: Re: Ideas on how to do this
From: "druid" <[EMAIL PROTECTED]>
I have to many fields for one form
So I want to make a popup form for some of the checkbox fields
I was going to use a FrmPopupForm call then a FrmReturnToForm(0)
call to go back to the origional form.
This can cause problems if it's not done carefully. You should
review the archives of this forum for more info.
I guess I could make global variables, but is their a better way
to do this.
If you mean having a global structure that stores data shared by
fields spread across several forms then I think this has the solid
advantage of making it much easier to move fields between forms
or add other forms as you extend the project. This is true regardless
of whether you use a popup or not - you want to avoid having
the data management for the app hard-coded to the fields that
happen to be on each form.
If your app is getting to this size it's time (past time?) to create a
code module to manage the data separately from the form code.
This module would have the code to load and save the data from
the database and would either expose globally visible variables
or, more work but better, expose get~ and set~ methods for
each property. Just because you're coding in C doesn't mean that
you can't use the object-oriented concepts of data hiding and
interfaces. They're really just old C concept anyway.
I guess it's obvious advice, but a great deal of the simple examples
for Palm have the field management logic in the same functions
that implement the forms so it's easy to extend these simple
examples without stopping to think that at some point their
underlying design has to be re-examined.
Chris Tutty
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