float tabSizePixels = getTabSize() + metrics.charWidth('m');
float tabSizePixels = getTabSize() * metrics.charWidth('m');
  public float nextTabStop(float x, int tabStop)  {    float tabSizePixels = getTabSize() + metrics.charWidth('m');    return (float) (Math.floor(x / tabSizePixels) + 1) * tabSizePixels;  }