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

/*
 *
 *      ChartDateTimeAxis.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 _CHARTDATETIMEAXIS_H_
#define _CHARTDATETIMEAXIS_H_

#include "ChartAxis.h"
#include "ChartString.h"

class CChartDateTimeAxis : public CChartAxis
{
        friend CChartCtrl;

public:
        enum TimeInterval
        {
                tiSecond,
                tiMinute,
                tiHour,
                tiDay,
                tiMonth,
                tiYear
        };


        void SetTickIncrement(bool bAuto, TimeInterval Interval, int Multiplier);

        void SetTickLabelFormat(bool bAutomatic, const TChartString& strFormat);

        void SetReferenceTick(COleDateTime referenceTick);

private:
        CChartDateTimeAxis();
        ~CChartDateTimeAxis();

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

        void RefreshTickIncrement();
        void RefreshFirstTick();
        void RefreshDTTickFormat();


        COleDateTime AddMonthToDate(const COleDateTime& Date, 
                                                                int iMonthsToAdd) const;

        double GetTickBeforeVal(double dValue) const;

        TChartString m_strDTTickFormat;         
        bool m_bAutoTickFormat;

        TimeInterval m_BaseInterval;

        int m_iDTTickIntervalMult;

        double m_dFirstTickValue;

        COleDateTime m_ReferenceTick;
};

#endif  // _CHARTDATETIMEAXIS_H_

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