/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
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 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */
#ifndef __com_sun_star_chart_XChartData_idl__
#define __com_sun_star_chart_XChartData_idl__

#include <com/sun/star/uno/XInterface.idl>

#include <com/sun/star/chart/XChartDataChangeEventListener.idl>



 module com {  module sun {  module star {  module chart {


/** manages the data of the chart.

    @see XChartDocument
 */
published interface XChartData: com::sun::star::uno::XInterface
{

    /** allows a component supporting the
        XChartDataChangeEventListener interface to
        register as listener.  The component will be notified with a
        ChartDataChangeEvent every time the chart's data
        changes.</p>

        @param aListener
            the component that is to be added as listener

        @see XChartDataChangeEventListener
        @see ChartDataChangeEvent
     */
    void addChartDataChangeEventListener( [in] com::sun::star::chart::XChartDataChangeEventListener aListener );


    /** removes a previously registered listener.

        @param aListener
            the component that is to be removed
     */
    void removeChartDataChangeEventListener( [in] com::sun::star::chart::XChartDataChangeEventListener aListener );


    /** @returns
            the value which is to be used as an indicator for a
            missing value in the data.

        <p>In IEEE arithmetic format it is one of the NaN values, so
        there are no conflicts with existing numeric values.</p>
     */
    double getNotANumber();


    /** checks whether the value given is equal to the indicator value
        for a missing value.

        <p>In IEEE arithmetic format it is one of the NaN values, so
        there are no conflicts with existing numeric values.</p>

        <p>Always use this method to check, if a value is <em>not a
        number</em>.  If you compare the value returned by
        XChartData::getNotANumber() to another double
        value using the = operator, you may not get the desired
        result!</p>

        @returns
            `TRUE` if the number given is interpreted by the chart as
            a missing value.

        @param nNumber
            the number that you want to check for validity.
     */
    boolean isNotANumber( [in] double nNumber );

};


}; }; }; };

#endif

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