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21 
22 
23 #ifndef CHART2_EXPONENTIALREGRESSIONCURVECALCULATOR_HXX
24 #define CHART2_EXPONENTIALREGRESSIONCURVECALCULATOR_HXX
25 
26 #include "RegressionCurveCalculator.hxx"
27 
28 namespace chart
29 {
30 
31 class ExponentialRegressionCurveCalculator :
32         public RegressionCurveCalculator
33 {
34 public:
35 	ExponentialRegressionCurveCalculator();
36 	virtual ~ExponentialRegressionCurveCalculator();
37 
38 protected:
39     virtual ::rtl::OUString ImplGetRepresentation(
40         const ::com::sun::star::uno::Reference< ::com::sun::star::util::XNumberFormatter >& xNumFormatter,
41         ::sal_Int32 nNumberFormatKey ) const;
42 
43 private:
44     // ____ XRegressionCurveCalculator ____
45     virtual void SAL_CALL recalculateRegression(
46         const ::com::sun::star::uno::Sequence< double >& aXValues,
47         const ::com::sun::star::uno::Sequence< double >& aYValues )
48         throw (::com::sun::star::uno::RuntimeException);
49     virtual double SAL_CALL getCurveValue( double x )
50         throw (::com::sun::star::lang::IllegalArgumentException,
51                ::com::sun::star::uno::RuntimeException);
52     virtual ::com::sun::star::uno::Sequence< ::com::sun::star::geometry::RealPoint2D > SAL_CALL getCurveValues(
53         double min,
54         double max,
55         ::sal_Int32 nPointCount,
56         const ::com::sun::star::uno::Reference< ::com::sun::star::chart2::XScaling >& xScalingX,
57         const ::com::sun::star::uno::Reference< ::com::sun::star::chart2::XScaling >& xScalingY,
58         ::sal_Bool bMaySkipPointsInCalculation )
59         throw (::com::sun::star::lang::IllegalArgumentException,
60                ::com::sun::star::uno::RuntimeException);
61 
62     // formula is: f(x) = exp(m_fLogIntercept) * exp( m_fLogSlope * x )
63     // mathematical model f(x) = Intercept * Slope^x
64     double m_fLogSlope;
65     double m_fLogIntercept;
66 };
67 
68 } //  namespace chart
69 
70 // CHART2_EXPONENTIALREGRESSIONCURVECALCULATOR_HXX
71 #endif
72