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

Include dependency graph for qwt_series_data.h:

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Go to the source code of this file.

Classes
class	QwtArraySeriesData< T >
	Template class for data, that is organized as QVector. More...
class	QwtIntervalSeriesData
	Interface for iterating over an array of intervals. More...
class	QwtPoint3DSeriesData
	Interface for iterating over an array of 3D points. More...
class	QwtPointSeriesData
	Interface for iterating over an array of points. More...
class	QwtSeriesData< T >
	Abstract interface for iterating over samples. More...
class	QwtSetSeriesData
	Interface for iterating over an array of samples. More...
class	QwtTradingChartData
Functions
QWT_EXPORT QRectF	qwtBoundingRect (const QwtSeriesData< QPointF > &, int from=0, int to=-1)
	Calculate the bounding rectangle of a series subset.
QWT_EXPORT QRectF	qwtBoundingRect (const QwtSeriesData< QwtPoint3D > &, int from=0, int to=-1)
	Calculate the bounding rectangle of a series subset.
QWT_EXPORT QRectF	qwtBoundingRect (const QwtSeriesData< QwtPointPolar > &, int from=0, int to=-1)
	Calculate the bounding rectangle of a series subset.
QWT_EXPORT QRectF	qwtBoundingRect (const QwtSeriesData< QwtIntervalSample > &, int from=0, int to=-1)
	Calculate the bounding rectangle of a series subset.
QWT_EXPORT QRectF	qwtBoundingRect (const QwtSeriesData< QwtSetSample > &, int from=0, int to=-1)
	Calculate the bounding rectangle of a series subset.
QWT_EXPORT QRectF	qwtBoundingRect (const QwtSeriesData< QwtOHLCSample > &, int from=0, int to=-1)
	Calculate the bounding rectangle of a series subset.
template<typename T , typename LessThan >
int	qwtUpperSampleIndex (const QwtSeriesData< T > &series, double value, LessThan lessThan)

Function Documentation

QWT_EXPORT QRectF qwtBoundingRect	(	const QwtSeriesData< QPointF > &	series,
		int	from,
		int	to
	)

Calculate the bounding rectangle of a series subset.

Slow implementation, that iterates over the series.

Parameters:

series	Series
from	Index of the first sample, <= 0 means from the beginning
to	Index of the last sample, < 0 means to the end

Returns:: Bounding rectangle

Definition at line 124 of file qwt_series_data.cpp.

QWT_EXPORT QRectF qwtBoundingRect	(	const QwtSeriesData< QwtPoint3D > &	series,
		int	from,
		int	to
	)

Calculate the bounding rectangle of a series subset.

Slow implementation, that iterates over the series.

Parameters:

series	Series
from	Index of the first sample, <= 0 means from the beginning
to	Index of the last sample, < 0 means to the end

Returns:: Bounding rectangle

Definition at line 141 of file qwt_series_data.cpp.

QWT_EXPORT QRectF qwtBoundingRect	(	const QwtSeriesData< QwtPointPolar > &	series,
		int	from,
		int	to
	)

Calculate the bounding rectangle of a series subset.

The horizontal coordinates represent the azimuth, the vertical coordinates the radius.

Slow implementation, that iterates over the series.

Parameters:

series	Series
from	Index of the first sample, <= 0 means from the beginning
to	Index of the last sample, < 0 means to the end

Returns:: Bounding rectangle

Definition at line 161 of file qwt_series_data.cpp.

QWT_EXPORT QRectF qwtBoundingRect	(	const QwtSeriesData< QwtIntervalSample > &	series,
		int	from,
		int	to
	)

Calculate the bounding rectangle of a series subset.

Slow implementation, that iterates over the series.

Parameters:

series	Series
from	Index of the first sample, <= 0 means from the beginning
to	Index of the last sample, < 0 means to the end

Returns:: Bounding rectangle

Definition at line 178 of file qwt_series_data.cpp.

QWT_EXPORT QRectF qwtBoundingRect	(	const QwtSeriesData< QwtSetSample > &	series,
		int	from,
		int	to
	)

Calculate the bounding rectangle of a series subset.

Slow implementation, that iterates over the series.

Parameters:

series	Series
from	Index of the first sample, <= 0 means from the beginning
to	Index of the last sample, < 0 means to the end

Returns:: Bounding rectangle

Definition at line 212 of file qwt_series_data.cpp.

QWT_EXPORT QRectF qwtBoundingRect	(	const QwtSeriesData< QwtOHLCSample > &	series,
		int	from,
		int	to
	)

Calculate the bounding rectangle of a series subset.

Slow implementation, that iterates over the series.

Parameters:

series	Series
from	Index of the first sample, <= 0 means from the beginning
to	Index of the last sample, < 0 means to the end

Returns:: Bounding rectangle

Definition at line 195 of file qwt_series_data.cpp.

template<typename T , typename LessThan >

int qwtUpperSampleIndex	(	const QwtSeriesData< T > &	series,
		double	value,
		LessThan	lessThan
	)		`[inline]`

Binary search for a sorted series of samples

qwtUpperSampleIndex returns the index of sample that is the upper bound of value. Is the the value smaller than the smallest value the return value will be 0. Is the value greater or equal than the largest value the return value will be -1.

Example: The following example shows finds a point of curve from an x coordinate

#include <qwt_series_data.h>
#include <qwt_plot_curve.h>

struct compareX
{
    inline bool operator()( const double x, const QPointF &pos ) const
    {
        return ( x < pos.x() );
    }
};

QLineF curveLineAt( const QwtPlotCurve *curve, double x )
{
    int index = qwtUpperSampleIndex<QPointF>( 
        *curve->data(), x, compareX() );
            
    if ( index == -1 && 
        x == curve->sample( curve->dataSize() - 1 ).x() )
    {   
        // the last sample is excluded from qwtUpperSampleIndex
        index = curve->dataSize() - 1;
    }

    QLineF line; // invalid
    if ( index > 0 )
    {
        line.setP1( curve->sample( index - 1 ) );
        line.setP2( curve->sample( index ) );
    }

    return line;
}

Parameters:

series	Series of samples
value	Value
lessThan	Compare operation

Note:: The samples must be sorted according to the order specified by the lessThan object

of the range [begin, end) and returns the position of the one-past-the-last occurrence of value. If no such item is found, returns the position where the item should be inserted.

Definition at line 325 of file qwt_series_data.h.

Classes

Functions

Function Documentation