qwt_series_data.h

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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/

#ifndef QWT_SERIES_DATA_H
#define QWT_SERIES_DATA_H 1

#include "qwt_global.h"
#include "qwt_samples.h"
#include "qwt_point_3d.h"
#include "qwt_point_polar.h"
#include <qvector.h>
#include <qrect.h>

template <typename T>
class QwtSeriesData
{
public:
    QwtSeriesData();

    virtual ~QwtSeriesData();

#ifndef QWT_PYTHON_WRAPPER

    virtual size_t size() const = 0;

    virtual T sample( size_t i ) const = 0;

    virtual QRectF boundingRect() const = 0;

#else
    // Needed for generating the python bindings, but not for using them !
    virtual size_t size() const { return 0; }
    virtual T sample( size_t i ) const { return T(); }
    virtual QRectF boundingRect() const { return d_boundingRect; }
#endif

    virtual void setRectOfInterest( const QRectF &rect );

protected:
    mutable QRectF d_boundingRect;

private:
    QwtSeriesData<T> &operator=( const QwtSeriesData<T> & );
};

template <typename T>
QwtSeriesData<T>::QwtSeriesData():
    d_boundingRect( 0.0, 0.0, -1.0, -1.0 )
{
}

template <typename T>
QwtSeriesData<T>::~QwtSeriesData()
{
}

template <typename T>
void QwtSeriesData<T>::setRectOfInterest( const QRectF & )
{
}

template <typename T>
class QwtArraySeriesData: public QwtSeriesData<T>
{
public:
    QwtArraySeriesData();

    explicit QwtArraySeriesData( const QVector<T> &samples );

    void setSamples( const QVector<T> &samples );

    const QVector<T> samples() const;

    virtual size_t size() const;

    virtual T sample( size_t index ) const;

protected:
    QVector<T> d_samples;
};

template <typename T>
QwtArraySeriesData<T>::QwtArraySeriesData()
{
}

template <typename T>
QwtArraySeriesData<T>::QwtArraySeriesData( const QVector<T> &samples ):
    d_samples( samples )
{
}

template <typename T>
void QwtArraySeriesData<T>::setSamples( const QVector<T> &samples )
{
    QwtSeriesData<T>::d_boundingRect = QRectF( 0.0, 0.0, -1.0, -1.0 );
    d_samples = samples;
}

template <typename T>
const QVector<T> QwtArraySeriesData<T>::samples() const
{
    return d_samples;
}

template <typename T>
size_t QwtArraySeriesData<T>::size() const
{
    return d_samples.size();
}

template <typename T>
T QwtArraySeriesData<T>::sample( size_t i ) const
{
    return d_samples[ static_cast<int>( i ) ];
}

class QWT_EXPORT QwtPointSeriesData: public QwtArraySeriesData<QPointF>
{
public:
    QwtPointSeriesData(
        const QVector<QPointF> & = QVector<QPointF>() );

    virtual QRectF boundingRect() const;
};

class QWT_EXPORT QwtPoint3DSeriesData: public QwtArraySeriesData<QwtPoint3D>
{
public:
    QwtPoint3DSeriesData(
        const QVector<QwtPoint3D> & = QVector<QwtPoint3D>() );
    virtual QRectF boundingRect() const;
};

class QWT_EXPORT QwtIntervalSeriesData: public QwtArraySeriesData<QwtIntervalSample>
{
public:
    QwtIntervalSeriesData(
        const QVector<QwtIntervalSample> & = QVector<QwtIntervalSample>() );

    virtual QRectF boundingRect() const;
};

class QWT_EXPORT QwtSetSeriesData: public QwtArraySeriesData<QwtSetSample>
{
public:
    QwtSetSeriesData(
        const QVector<QwtSetSample> & = QVector<QwtSetSample>() );

    virtual QRectF boundingRect() const;
};

class QWT_EXPORT QwtTradingChartData: public QwtArraySeriesData<QwtOHLCSample>
{
public:
    QwtTradingChartData(
        const QVector<QwtOHLCSample> & = QVector<QwtOHLCSample>() );

    virtual QRectF boundingRect() const;
};

QWT_EXPORT QRectF qwtBoundingRect(
    const QwtSeriesData<QPointF> &, int from = 0, int to = -1 );

QWT_EXPORT QRectF qwtBoundingRect(
    const QwtSeriesData<QwtPoint3D> &, int from = 0, int to = -1 );

QWT_EXPORT QRectF qwtBoundingRect(
    const QwtSeriesData<QwtPointPolar> &, int from = 0, int to = -1 );

QWT_EXPORT QRectF qwtBoundingRect(
    const QwtSeriesData<QwtIntervalSample> &, int from = 0, int to = -1 );

QWT_EXPORT QRectF qwtBoundingRect(
    const QwtSeriesData<QwtSetSample> &, int from = 0, int to = -1 );

QWT_EXPORT QRectF qwtBoundingRect(
    const QwtSeriesData<QwtOHLCSample> &, int from = 0, int to = -1 );

template <typename T, typename LessThan>
inline int qwtUpperSampleIndex( const QwtSeriesData<T> &series,
    double value, LessThan lessThan  ) 
{
    const int indexMax = series.size() - 1;

    if ( indexMax < 0 || !lessThan( value, series.sample( indexMax ) )  )
        return -1;

    int indexMin = 0;
    int n = indexMax;

    while ( n > 0 )
    {
        const int half = n >> 1;
        const int indexMid = indexMin + half;

        if ( lessThan( value, series.sample( indexMid ) ) )
        {
            n = half;
        }
        else
        {
            indexMin = indexMid + 1;
            n -= half + 1;
        }
    }

    return indexMin;
}

#endif