private boolean autoRange;

    /** The lowest value in the axis range. */
    private double minimumValue;

    /** The highest value in the axis range. */
    private double maximumValue;

    /** A checkbox that indicates whether or not the axis range is determined
     *  automatically.
     */
    private Button autoRangeCheckBox;

    /** A text field for entering the minimum value in the axis range. */
    private Text minimumRangeValue;

    /** A text field for entering the maximum value in the axis range. */
    private Text maximumRangeValue;