改变cxgrid行字体颜色

下面为在CxGrid的CustomDrawCell的代码
procedure TForm1.cxGrid1DBTableView1CustomDrawCell(
  Sender: TcxCustomGridTableView; ACanvas: TcxCanvas;
  AViewInfo: TcxGridTableDataCellViewInfo; var ADone: Boolean);
var
  vStr:string;
begin
  vStr:=Trim(VarAsType(AViewInfo.GridRecord.DisplayTexts[cxGrid1DBTableView1Column3.Index],varString));
  if vStr='A' then
  begin
    ACanvas.Canvas.Brush.Color   :=clred;
    ACanvas.canvas.Font.Color    :=clblack;
  end
  else if vStr='B' then
  begin
    ACanvas.Canvas.Brush.Color   :=clgreen;
    ACanvas.canvas.Font.Color    :=clblack;
  end
    else if vStr='C' then
  begin
    ACanvas.Canvas.Brush.Color   :=clYellow;
    ACanvas.canvas.Font.Color    :=clblack;
  end;


  if AViewInfo.Selected then
  begin
    ACanvas.Canvas.Font.Color   :=clwhite;
    ACanvas.Canvas.Brush.Color  :=clNavy;
  end;
end;