I have had problems with large numbers of list items in a list prior to OS
3.5. It seemed to occur when the line height * number of items exceeded
32K. In your case, 4000*12 is definitely greater than 32K. I ended up
writing my own gadget to simulate a list.
I didn't track down exactly why the error was occurring, though.
> I've got a listbox with a list of about 4,000 items. For all the listbox
> drawing commands we use a simple callback function to simply draw items to
> the listbox depending on user criteria. In Palm OS 3.5 we have a strange
> problem where just after the callback function is done all the listbox
> drawing functions will randomly erase items off the listbox. They're still
> marked as visible yet they don't show up on the screen. I know that it's
> not the callback function as I've placed breakpoints at the end of the
> function to watch the values dance through. At the very end of the last
> iteration of the callback function everything is displayed correctly on the
> listbox and in between the time it takes for the listbox command to return
> to the previous code it suddenly erases much of the items in the listbox.
>
> Has anyone else had this problem? If so, have you found acceptable
> workarounds? I've tried various combinations of the listbox routines from
> list.h and nothing seems to work.
--
Neil Rhodes
[EMAIL PROTECTED] Available for contract programming
Coauthor: Palm Programming: the Developer's Guide (O'Reilly)
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