public RowFilter getRowFilter(Project project) {
if (selected &&
eval_x != null && errorMessage_x == null &&
eval_y != null && errorMessage_y == null)
{
return new DualExpressionsNumberComparisonRowFilter(
eval_x, columnName_x, columnIndex_x, eval_y, columnName_y, columnIndex_y) {
double from_x_pixels = from_x * l;
double to_x_pixels = to_x * l;
double from_y_pixels = from_y * l;