Re: List loading issue

[Matt Graham]

What you have to do is find out how many of your records 
have "Y", say N, then set the number of list choices to N, 
then in your draw function, itemNumber refers to a record in 
the set of those with "Y".

The trick is doing this efficiently.



Steven M. Jerrett wrote:
My question involves selectively loading a list using a 
LstSetDrawFunction function without winding up with blank "slots" in the 
list.
The data involved contains a "Dspfg" field that contains "Y" if it is to 
be displayed in the initial list or "N" if not.

static void DrawOneDwellInList(Int16 itemNumber, RectanglePtr bounds, 
Char **text)
 {
   #pragma unused(text)
   MemHandle h;
   UInt16 index = 0;
   Dwells Dw;
   Int16 res = 0;
   char dispRec[1];
   char Disp[1];
   char dispLoc[128];
   char dispUnit[128];
   StrCopy(Disp, "Y");
   DmSeekRecordInCategory(gDwDB, &index, (UInt16) itemNumber, 
dmSeekForward, dmAllCategories);
   h = DmQueryRecord(gDwDB, index);
   if (h)
     {
       UnpackDwells(&Dw, (PackedDwells *) MemHandleLock(h));
       StrCopy(dispRec, Dw.Dspfg);
       res = StrCaselessCompare(dispRec, Disp);
       if (res == 0)
         {
           StrCopy(dispLoc, Dw.Loc);
           StrCopy(dispUnit, Dw.Unit);
           DrawCharsToFitWidth2(dispLoc, dispUnit, bounds);
         }
       MemHandleUnlock(h);
     }
 }

When this executes, the list is populated thusly:

   3703 Oakland Gravel Rd Bldg Main A
   3703 Oakland Gravel Rd Bldg Main B
   3703 Oakland Gravel Rd Bldg Main C


   3800 Cooper Drive East Bldg 2

 with blank spots where the records with "N" in Dspfg would normally be 
displayed. Ideally, the display should be:

   3703 Oakland Gravel Rd Bldg Main A
   3703 Oakland Gravel Rd Bldg Main B
   3703 Oakland Gravel Rd Bldg Main C
   3800 Cooper Drive East Bldg 2
 Using categories is not an option in this case for a variety of 
reasons. It seems as if the choices are either what is being displayed 
currently (with the blanks) or displaying all the records. Does anyone 
have any suggestions????


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