I've done some further checking and it seems that the table load callback
procedure routine doesn't recognise the global variable for the DmOpenRef to
my database. Any ideas on why this might happen/solutions??
Regards,
John.
-----Original Message-----
From: John Walls [mailto:[EMAIL PROTECTED]]
Sent: 22 February 2000 09:50
To: 'Palm Developer Forum'
Subject: RE: Error in TableLoadDataFunc
Thanks Steven, however, that code is just for debugging (and actually seems
to work fine declared as just a char).
The problem remains without this code (perhaps I shouldn't have included it
in the code sample). Any other suggestions/pointers?
Regards,
John.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of McMicken,
Steven
Sent: 21 February 2000 15:23
To: Palm Developer Forum
Cc: '[EMAIL PROTECTED]'
Subject: RE: Error in TableLoadDataFunc
Are you looking at the value of DB in a debugger, or are you taking the
return value in 'c'. You allocate c as a single character, yet StrIToA
returns a character pointer, which will require at least two locations. Use
char *c, then allocate space with a call to MemPtrNew.
Regards,
Steve
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]
> Sent: Monday, February 21, 2000 10:19 AM
> To: Palm Developer Forum
> Subject: Error in TableLoadDataFunc
>
>
>
> Can anyone spot the error in this? I'm trying to initialise a
> table prior to
> a FrmDrawForm. The DmNumRecords and DmQuery both seem to
> cause problems.
> With DmNumRecords returning '4092'! when DB only has 2
> records in it. DB is
> a global variable and IRecordTypePtr is a pointer to a record
> structure.
> Preceding functions can call DmNumRecord correctly and I
> can't work out
> what's wrong with this function. Can you help?
>
> Perhaps I don't understand how the OS uses TableLoadDataFunc
> functions. If
> anyone's got some simple source code for setting up and using
> a table that
> would be helpful too.
>
> Thanks in anticipation,
>
> John.
>
> static Err ListViewGetSummary (VoidPtr table, Word row, Word column,
> Boolean editable, VoidHand textH, WordPtr textOffset, WordPtr
> textAllocSize,
> FieldPtr fld)
> {
>
> Word recordNum;
> VoidHand recordH;
> FieldAttrType attr;
> IRecordTypePtr recordP;
> IRecordTypePtr nilPtr = NULL;
> UInt maxrecords = 0;
> char c;
>
> // Get the record number that corresponds to the table item.
> // The record number is stored as the row id.
> recordNum = TblGetRowID (table, row);
>
> ErrDisplay("Check Point 2");
> maxrecords = DmNumRecords(DB);
> ErrDisplay("Check Point 3");
> StrIToA(&c, maxrecords);
> ErrDisplay(&c);
>
> recordH = DmQueryRecord(DB, recordNum);
> ErrFatalDisplayIf ((! recordH), "Record not found");
> ErrDisplay("Check Point 4");
> recordP = (IRecordTypePtr) MemHandleLock(recordH);
>
>
> *textOffset = &recordP->summary - ((CharPtr) recordP);
> *textAllocSize = StrLen (&recordP->summary) + 1; //
> one for null
> terminator
> *textH = recordH;
>
> MemHandleUnlock(recordH);
>
> // Set the field to support auto-shift.
> if (fld)
> {
> FldGetAttributes (fld, &attr);
> attr.autoShift = true;
> FldSetAttributes (fld, &attr);
> }
>
> ErrDisplay("Check Point 4");
> return (0);
> }
>
>
>
> --
> "This message is brought to you by Reuters.net;
> Any views expressed are those of the sender, except where the sender
> specifically states them to be the views of Reuters Limited."
>
> --
> For information on using the Palm Developer Forums, or to
> unsubscribe, please see http://www.palm.com/devzone/mailinglists.html
>
>
--
For information on using the Palm Developer Forums, or to unsubscribe,
please see http://www.palm.com/devzone/mailinglists.html
--
"This message is brought to you by Reuters.net;
Any views expressed are those of the sender, except where the sender
specifically states them to be the views of Reuters Limited."
--
"This message is brought to you by Reuters.net;
Any views expressed are those of the sender, except where the sender
specifically states them to be the views of Reuters Limited."
--
For information on using the Palm Developer Forums, or to unsubscribe, please see
http://www.palm.com/devzone/mailinglists.html
