qwt_point_data.h

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/******************************************************************************
 * 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_POINT_DATA_H
#define QWT_POINT_DATA_H

#include "qwt_global.h"
#include "qwt_series_data.h"

#include <cstring>

template< typename T >
class QwtPointArrayData : public QwtPointSeriesData
{
  public:
    QwtPointArrayData( const QVector< T >& x, const QVector< T >& y );
    QwtPointArrayData( const T* x, const T* y, size_t size );

    virtual size_t size() const QWT_OVERRIDE;
    virtual QPointF sample( size_t index ) const QWT_OVERRIDE;

    const QVector< T >& xData() const;
    const QVector< T >& yData() const;

  private:
    QVector< T > m_x;
    QVector< T > m_y;
};

template< typename T >
class QwtCPointerData : public QwtPointSeriesData
{
  public:
    QwtCPointerData( const T* x, const T* y, size_t size );

    virtual size_t size() const QWT_OVERRIDE;
    virtual QPointF sample( size_t index ) const QWT_OVERRIDE;

    const T* xData() const;
    const T* yData() const;

  private:
    const T* m_x;
    const T* m_y;
    size_t m_size;
};

template< typename T >
class QwtValuePointData : public QwtPointSeriesData
{
  public:
    QwtValuePointData( const QVector< T >& y );
    QwtValuePointData( const T* y, size_t size );

    virtual size_t size() const QWT_OVERRIDE;
    virtual QPointF sample( size_t index ) const QWT_OVERRIDE;

    const QVector< T >& yData() const;

  private:
    QVector< T > m_y;
};

template< typename T >
class QwtCPointerValueData : public QwtPointSeriesData
{
  public:
    QwtCPointerValueData( const T* y, size_t size );

    virtual size_t size() const QWT_OVERRIDE;
    virtual QPointF sample( size_t index ) const QWT_OVERRIDE;

    const T* yData() const;

  private:
    const T* m_y;
    size_t m_size;
};

class QWT_EXPORT QwtSyntheticPointData : public QwtPointSeriesData
{
  public:
    QwtSyntheticPointData( size_t size,
        const QwtInterval& = QwtInterval() );

    void setSize( size_t size );
    virtual size_t size() const QWT_OVERRIDE;

    void setInterval( const QwtInterval& );
    QwtInterval interval() const;

    virtual QRectF boundingRect() const QWT_OVERRIDE;
    virtual QPointF sample( size_t index ) const QWT_OVERRIDE;

    virtual double y( double x ) const = 0;
    virtual double x( uint index ) const;

    virtual void setRectOfInterest( const QRectF& ) QWT_OVERRIDE;
    QRectF rectOfInterest() const;

  private:
    size_t m_size;
    QwtInterval m_interval;
    QRectF m_rectOfInterest;
    QwtInterval m_intervalOfInterest;
};

template< typename T >
QwtPointArrayData< T >::QwtPointArrayData(
        const QVector< T >& x, const QVector< T >& y )
    : m_x( x )
    , m_y( y )
{
}

template< typename T >
QwtPointArrayData< T >::QwtPointArrayData( const T* x, const T* y, size_t size )
{
    m_x.resize( size );
    std::memcpy( m_x.data(), x, size * sizeof( T ) );

    m_y.resize( size );
    std::memcpy( m_y.data(), y, size * sizeof( T ) );
}

template< typename T >
size_t QwtPointArrayData< T >::size() const
{
    return qMin( m_x.size(), m_y.size() );
}

template< typename T >
QPointF QwtPointArrayData< T >::sample( size_t index ) const
{
    return QPointF( m_x[int( index )], m_y[int( index )] );
}

template< typename T >
const QVector< T >& QwtPointArrayData< T >::xData() const
{
    return m_x;
}

template< typename T >
const QVector< T >& QwtPointArrayData< T >::yData() const
{
    return m_y;
}

template< typename T >
QwtValuePointData< T >::QwtValuePointData( const QVector< T >& y )
    : m_y( y )
{
}

template< typename T >
QwtValuePointData< T >::QwtValuePointData( const T* y, size_t size )
{
    m_y.resize( size );
    std::memcpy( m_y.data(), y, size * sizeof( T ) );
}

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

template< typename T >
QPointF QwtValuePointData< T >::sample( size_t index ) const
{
    return QPointF( index, m_y[int( index )] );
}

template< typename T >
const QVector< T >& QwtValuePointData< T >::yData() const
{
    return m_y;
}

template< typename T >
QwtCPointerData< T >::QwtCPointerData( const T* x, const T* y, size_t size )
    : m_x( x )
    , m_y( y )
    , m_size( size )
{
}

template< typename T >
size_t QwtCPointerData< T >::size() const
{
    return m_size;
}

template< typename T >
QPointF QwtCPointerData< T >::sample( size_t index ) const
{
    return QPointF( m_x[int( index )], m_y[int( index )] );
}

template< typename T >
const T* QwtCPointerData< T >::xData() const
{
    return m_x;
}

template< typename T >
const T* QwtCPointerData< T >::yData() const
{
    return m_y;
}

template< typename T >
QwtCPointerValueData< T >::QwtCPointerValueData( const T* y, size_t size )
    : m_y( y )
    , m_size( size )
{
}

template< typename T >
size_t QwtCPointerValueData< T >::size() const
{
    return m_size;
}

template< typename T >
QPointF QwtCPointerValueData< T >::sample( size_t index ) const
{
    return QPointF( index, m_y[ int( index ) ] );
}

template< typename T >
const T* QwtCPointerValueData< T >::yData() const
{
    return m_y;
}

#endif