At 2:05 PM -0500 2002/03/08, Matt Disher (TiBook) wrote:
>For some reason:
>
>void GadgetRedrawGadget()
>{
> FormGadgetType* theGadgetPtr;
> UInt16 gadgetIndex;
> FormPtr frmP;
>
> frmP = FrmGetFormPtr(MainForm);
> gadgetIndex = FrmGetObjectIndex(frmP, MainFooGadget);
> theGadgetPtr = FrmGetObjectPtr (frmP, gadgetIndex);
>
> GadgetInitialDraw(theGadgetPtr);
>}
>
>worked and the former didn't (see below).
Probably because in the working version above, you do FrmGetFormPtr(MainForm) but in
the non-working version you did FrmGetActiveForm to get the form pointer. If the form
containing MainFooGadget hadn't yet been *drawn* then it's not yet the active form, so
FrmGetActiveForm would have returned the form pointer of some other form which does
not contain your MainFooGadget. Step-debugging either version of the routine should
make this apparent.
We were particularly interested in looking into this because we thought it might have
some bearing on a Palm OS 5 emulator issue we were tracking down... but, it looks like
that's not the case... which is a good thing this close to GM, believe me... ;o)
Best Regards,
Jim Schram
PalmSource Inc.
Partner Engineering
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