qwt_series_data.cpp

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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
 *****************************************************************************/

#include "qwt_series_data.h"
#include "qwt_point_polar.h"

static inline QRectF qwtBoundingRect( const QPointF &sample )
{
    return QRectF( sample.x(), sample.y(), 0.0, 0.0 );
}

static inline QRectF qwtBoundingRect( const QwtPoint3D &sample )
{
    return QRectF( sample.x(), sample.y(), 0.0, 0.0 );
}

static inline QRectF qwtBoundingRect( const QwtPointPolar &sample )
{
    return QRectF( sample.azimuth(), sample.radius(), 0.0, 0.0 );
}

static inline QRectF qwtBoundingRect( const QwtIntervalSample &sample )
{
    return QRectF( sample.interval.minValue(), sample.value,
        sample.interval.maxValue() - sample.interval.minValue(), 0.0 );
}

static inline QRectF qwtBoundingRect( const QwtSetSample &sample )
{
    if ( sample.set.empty() )
        return QRectF( sample.value, 0.0, 0.0, -1.0 );

    double minY = sample.set[0];
    double maxY = sample.set[0];

    for ( int i = 1; i < sample.set.size(); i++ )
    {
        if ( sample.set[i] < minY )
            minY = sample.set[i];

        if ( sample.set[i] > maxY )
            maxY = sample.set[i];
    }

    return QRectF( sample.value, minY, 0.0, maxY - minY );
}

static inline QRectF qwtBoundingRect( const QwtOHLCSample &sample )
{
    const QwtInterval interval = sample.boundingInterval();
    return QRectF( interval.minValue(), sample.time, interval.width(), 0.0 );
}

static inline QRectF qwtBoundingRect( const QwtVectorFieldSample &sample )
{
    /*
        When displaying a sample as an arrow its length will be
        proportional to the magnitude - but not the same.
        As the factor between length and magnitude is not known
        we can't include vx/vy into the bounding rectangle.
     */

    return QRectF( sample.x, sample.y, 0, 0 );
}

template <class T>
QRectF qwtBoundingRectT(
    const QwtSeriesData<T>& series, int from, int to )
{
    QRectF boundingRect( 1.0, 1.0, -2.0, -2.0 ); // invalid;

    if ( from < 0 )
        from = 0;

    if ( to < 0 )
        to = series.size() - 1;

    if ( to < from )
        return boundingRect;

    int i;
    for ( i = from; i <= to; i++ )
    {
        const QRectF rect = qwtBoundingRect( series.sample( i ) );
        if ( rect.width() >= 0.0 && rect.height() >= 0.0 )
        {
            boundingRect = rect;
            i++;
            break;
        }
    }

    for ( ; i <= to; i++ )
    {
        const QRectF rect = qwtBoundingRect( series.sample( i ) );
        if ( rect.width() >= 0.0 && rect.height() >= 0.0 )
        {
            boundingRect.setLeft( qMin( boundingRect.left(), rect.left() ) );
            boundingRect.setRight( qMax( boundingRect.right(), rect.right() ) );
            boundingRect.setTop( qMin( boundingRect.top(), rect.top() ) );
            boundingRect.setBottom( qMax( boundingRect.bottom(), rect.bottom() ) );
        }
    }

    return boundingRect;
}

QRectF qwtBoundingRect(
    const QwtSeriesData<QPointF> &series, int from, int to )
{
    return qwtBoundingRectT<QPointF>( series, from, to );
}

QRectF qwtBoundingRect(
    const QwtSeriesData<QwtPoint3D> &series, int from, int to )
{
    return qwtBoundingRectT<QwtPoint3D>( series, from, to );
}

QRectF qwtBoundingRect(
    const QwtSeriesData<QwtPointPolar> &series, int from, int to )
{
    return qwtBoundingRectT<QwtPointPolar>( series, from, to );
}

QRectF qwtBoundingRect(
    const QwtSeriesData<QwtIntervalSample>& series, int from, int to )
{
    return qwtBoundingRectT<QwtIntervalSample>( series, from, to );
}

QRectF qwtBoundingRect(
    const QwtSeriesData<QwtOHLCSample>& series, int from, int to )
{
    return qwtBoundingRectT<QwtOHLCSample>( series, from, to );
}

QRectF qwtBoundingRect(
    const QwtSeriesData<QwtSetSample>& series, int from, int to )
{
    return qwtBoundingRectT<QwtSetSample>( series, from, to );
}

QRectF qwtBoundingRect(
    const QwtSeriesData<QwtVectorFieldSample> &series, int from, int to )
{
    return qwtBoundingRectT<QwtVectorFieldSample>( series, from, to );
}

QwtPointSeriesData::QwtPointSeriesData(
        const QVector<QPointF> &samples ):
    QwtArraySeriesData<QPointF>( samples )
{
}

QRectF QwtPointSeriesData::boundingRect() const
{
    if ( d_boundingRect.width() < 0.0 )
        d_boundingRect = qwtBoundingRect( *this );

    return d_boundingRect;
}

QwtPoint3DSeriesData::QwtPoint3DSeriesData(
        const QVector<QwtPoint3D> &samples ):
    QwtArraySeriesData<QwtPoint3D>( samples )
{
}

QRectF QwtPoint3DSeriesData::boundingRect() const
{
    if ( d_boundingRect.width() < 0.0 )
        d_boundingRect = qwtBoundingRect( *this );

    return d_boundingRect;
}

QwtIntervalSeriesData::QwtIntervalSeriesData(
        const QVector<QwtIntervalSample> &samples ):
    QwtArraySeriesData<QwtIntervalSample>( samples )
{
}

QRectF QwtIntervalSeriesData::boundingRect() const
{
    if ( d_boundingRect.width() < 0.0 )
        d_boundingRect = qwtBoundingRect( *this );

    return d_boundingRect;
}

QwtVectorFieldData::QwtVectorFieldData(
        const QVector<QwtVectorFieldSample> &samples ):
    QwtArraySeriesData<QwtVectorFieldSample>( samples ),
    d_maxMagnitude( -1.0 )
{
}

QRectF QwtVectorFieldData::boundingRect() const
{
    if ( d_boundingRect.width() < 0.0 )
        d_boundingRect = qwtBoundingRect( *this );

    return d_boundingRect;
}

double QwtVectorFieldData::maxMagnitude() const
{
    if ( d_maxMagnitude < 0.0 )
    {
        double max = 0.0;

        for ( uint i = 0; i < size(); i++ )
        {
            const QwtVectorFieldSample s = sample( i );

            const double l = s.vx * s.vx + s.vy * s.vy;
            if ( l > max )
                max = l;
        }

        d_maxMagnitude = std::sqrt( max );
    }

    return d_maxMagnitude;
}

QwtSetSeriesData::QwtSetSeriesData(
        const QVector<QwtSetSample> &samples ):
    QwtArraySeriesData<QwtSetSample>( samples )
{
}

QRectF QwtSetSeriesData::boundingRect() const
{
    if ( d_boundingRect.width() < 0.0 )
        d_boundingRect = qwtBoundingRect( *this );

    return d_boundingRect;
}

QwtTradingChartData::QwtTradingChartData(
        const QVector<QwtOHLCSample> &samples ):
    QwtArraySeriesData<QwtOHLCSample>( samples )
{
}

QRectF QwtTradingChartData::boundingRect() const
{
    if ( d_boundingRect.width() < 0.0 )
        d_boundingRect = qwtBoundingRect( *this );

    return d_boundingRect;
}