_EXTENDING MFC_
by Stefan Hoenig and Scot Wingo


Listing One

void CGXGridCore::ComposeStyleRowCol(ROWCOL nRow, ROWCOL nCol, CGXStyle*pStyle)
{
  //Copy the cell style first
  GetStyleRowCol(nRow, nCol, *pStyle, secCopy);

  //Apply the row style next
  GetStyleRowCol(nRow,0,*pStyle,secApply);

  //Apply the colum style
  GetStyleRowCol(0,nCol,*pStyle,secApply);

  //Finally inherit any base styles
  pStyle->LoadBaseStyle(GetStylesMap());
}


Listing Two

BOOL CDBaseBrowserView::GetStyleRowCol(int nRow, int, nCol, SECStyle&
style, SEC_OPERATION op)
{
  if (nRow == 0) { // Column style
    style.SetStyle(GetField(nCol)->name); //Get column name from DB
    return TRUE;
  }
  //Advance row in DB (row = record)
  if (GetDocument()->m_dbfile.Seek(nRecord -1){
    //Row headings
    if (nCol == 0){
      char sz[20];
      wsprintf(sz,"%5lu%c",nRow,
               GetDocument()->m_dbfile.IsDeleted() ? '*' : ' ');
      style.SetValue(sz);
      return TRUE;
    }
    //If we get here, we're looking up a cell.
    CSting s;
    CField * fld = GetField(nCol);

    //Get cell data and store along with max length
    GetDocument->m_dbFile.GetValue(GetFieldId(nCol),s);style.SetValue(s);
    style.SetMaxLength(fld->len);

    // Now set up the cell appearance based on field typeswitch(fld->type){
        case 'N' : style.SetBaseStyle(SEC_NUMERIC); break;
        case 'C' : style.SetBaseStyle(SEC_TEXT); break;
        case 'D' : style.SetBaseStyle(SEC_DATE); break;
        case 'L' : style.SetBaseStyle(SEC_CURRENCY); break;
    // a sidenote:
    // this is also a good example for using base styles. The user can 
    // change the appearance of all numeric, text, date and currency fields
    // at run time with the SECStyleSheet described above.
    // In OnInitialUpdate base styles are typicaly initialized 
        // programmaticaly as for example:
    // BaseStyle(SEC_NUMERIC)
    //  .SetHorizontalAlignment(DT_LEFT)
    //  .SetFont(SECFont().SetBold(TRUE));
    }
    return TRUE;
  }
  return FALSE; //At end of DB
}