public void setGridLineZoomFactor(int lineZoomFactor) {
    int oldValue = grid.getLineZoomFactor();
    if (oldValue != lineZoomFactor) {
      grid.setLineZoomFactor(lineZoomFactor);
      firePropertyChange(GRID_LINE_ZOOM_FACTOR_PROP, oldValue, lineZoomFactor);
    }
  }
public void setGridLineZoomFactor(int lineZoomFactor)