E:/Sources Misc/ChartDemo/ChartCtrl/ChartLogarithmicAxis.h

/*
 *
 *      ChartLogarithmicAxis.h
 *
 *      Written by Cédric Moonen (cedric_moonen@hotmail.com)
 *
 *
 *
 *      This code may be used for any non-commercial and commercial purposes in a compiled form.
 *      The code may be redistributed as long as it remains unmodified and providing that the 
 *      author name and this disclaimer remain intact. The sources can be modified WITH the author 
 *      consent only.
 *      
 *      This code is provided without any garanties. I cannot be held responsible for the damage or
 *      the loss of time it causes. Use it at your own risks
 *
 *      An e-mail to notify me that you are using this code is appreciated also.
 *
 *
 */

#ifndef _CHARTLOGARITHMICAXIS_H_
#define _CHARTLOGARITHMICAXIS_H_

#include "ChartAxis.h"


class CChartLogarithmicAxis : public CChartAxis
{
        friend CChartCtrl;

private:
        CChartLogarithmicAxis();
        ~CChartLogarithmicAxis();

        double ScreenToValue(long ScreenVal) const;
        void PanAxis(long PanStart, long PanEnd);

        double GetFirstTickValue() const;
        bool GetNextTickValue(double dCurrentTick, double& dNextTick) const;
        TChartString GetTickLabel(double TickValue) const;
        long ValueToScreenStandard(double Value) const;
        long ValueToScreenDiscrete(double Value) const;
        long GetTickPos(double TickVal) const;

        void RefreshTickIncrement();
        void RefreshFirstTick();

        void GetScrollbarSteps(int& iTotalSteps, int& iCurrentStep);
        void SetAxisToScrollStep(int iPreviousStep, int iCurrentStep, bool bScrollInverted);

        double m_dFirstTickValue;
};

#endif  // _CHARTLOGARITHMICAXIS_H_

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