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#ifndef CHART2_EXPONENTIALREGRESSIONCURVECALCULATOR_HXX
#define CHART2_EXPONENTIALREGRESSIONCURVECALCULATOR_HXX

#include "RegressionCurveCalculator.hxx"

namespace chart
{

class ExponentialRegressionCurveCalculator :
        public RegressionCurveCalculator
{
public:
	ExponentialRegressionCurveCalculator();
	virtual ~ExponentialRegressionCurveCalculator();

protected:
    virtual ::rtl::OUString ImplGetRepresentation(
        const ::com::sun::star::uno::Reference< ::com::sun::star::util::XNumberFormatter >& xNumFormatter,
        ::sal_Int32 nNumberFormatKey ) const;

private:
    // ____ XRegressionCurveCalculator ____
    virtual void SAL_CALL recalculateRegression(
        const ::com::sun::star::uno::Sequence< double >& aXValues,
        const ::com::sun::star::uno::Sequence< double >& aYValues )
        throw (::com::sun::star::uno::RuntimeException);
    virtual double SAL_CALL getCurveValue( double x )
        throw (::com::sun::star::lang::IllegalArgumentException,
               ::com::sun::star::uno::RuntimeException);
    virtual ::com::sun::star::uno::Sequence< ::com::sun::star::geometry::RealPoint2D > SAL_CALL getCurveValues(
        double min,
        double max,
        ::sal_Int32 nPointCount,
        const ::com::sun::star::uno::Reference< ::com::sun::star::chart2::XScaling >& xScalingX,
        const ::com::sun::star::uno::Reference< ::com::sun::star::chart2::XScaling >& xScalingY,
        ::sal_Bool bMaySkipPointsInCalculation )
        throw (::com::sun::star::lang::IllegalArgumentException,
               ::com::sun::star::uno::RuntimeException);

    // formula is: f(x) = exp(m_fLogIntercept) * exp( m_fLogSlope * x )
    // mathematical model f(x) = Intercept * Slope^x
    double m_fLogSlope;
    double m_fLogIntercept;
};

} //  namespace chart

// CHART2_EXPONENTIALREGRESSIONCURVECALCULATOR_HXX
#endif
