Re: problems with FrmRemoveObject

[Jennifer Fell]

I recently mentioned about having problem with FrmRemoveObject when removing 
dynamically created popup lists. I thought it would be btter if I also 
mention where exactly it crashes: it is the PrvOffsetPtrIfNeeded function I 
suppose.

Here is the call stack:
FrmRemoveObject
 - PrvMoveFormInternals
   -PrvRewireForm
     -PrvRewireForm
       -PrvOffsetPtrIfNeeded // HAVING PROBLEM
Thanks,
Jenni
----- Original Message ----- 
From: "Jennifer Fell" <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[EMAIL PROTECTED]>
Sent: Monday, October 25, 2004 3:08 PM
Subject: problems with FrmRemoveObject


Here is a piece of code which gets executed when removing a object that 
has a number of popup lists. These lists are dynamically created in that 
object's constructor function. Anyway, this FrmRemoveObject crashes in 
some specific situations. I know it's impossible to tell what's going on 
without looking at the codes, but still I wonder if anybody can guess what 
could possibly cause this problem. FYI,

for (i = TOTAL_LISTS - 1; i >= 0; i--) {
   lstId = popupLists[i].lstId;
   objId = FrmGetObjectIndex (frmP, lstId);
   FrmHideObject (&frmP, objId);
   FrmRemoveObject (&frmP, objId);            //CRASHES HERE
   ctlId = popupLists[i].ctlId;
   objId = FrmGetObjectIndex (frmP, ctlId);
   FrmHideObject (&frmP, objId);
   FrmRemoveObject (&frmP, objId);
}
Thanks,
Jenni
Just in case you are curious about the construction process, here is a 
portion of the constructor function where I am creating the object (there 
mightbe some typo errors):

lastRsrcId = 2000;
for (i = 0; i < TOTAL_LISTS; i++) {
   if (!CtlNewControl ((void**)&frmP, ++lastRsrcId,
                                  popupTriggerCtl, NULL,
                                  0, 0, maxWidth, 0,
                                  stdFont, NULL, true) {
        ErrDisplay ("Memory ERROR!");
        return;
   }
   popupLists[i].ctlId = lastRsrcId;
   if (LstNewList ((void**)&frmP, ++lastRsrcId,
                            0, 0, maxWidth, 0, stdFont, 3,
                            popupLists[i].popupBox[popupBox].ctlId)) {
        ErrDisplay ("Memory ERROR!");
        return;
   }
   popupLists[i].lstId = lastRsrcId;
}
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