qwt_series_data.h File Reference

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

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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
class	QwtVectorFieldData
	Interface for iterating over an array of vector field samples. More...

Functions
QWT_EXPORT QRectF	qwtBoundingRect (const QwtSeriesData< QPointF > &, int from=0, int to=-1)
	Calculate the bounding rectangle of a series subset. More...
QWT_EXPORT QRectF	qwtBoundingRect (const QwtSeriesData< QwtPoint3D > &, int from=0, int to=-1)
	Calculate the bounding rectangle of a series subset. More...
QWT_EXPORT QRectF	qwtBoundingRect (const QwtSeriesData< QwtPointPolar > &, int from=0, int to=-1)
	Calculate the bounding rectangle of a series subset. More...
QWT_EXPORT QRectF	qwtBoundingRect (const QwtSeriesData< QwtIntervalSample > &, int from=0, int to=-1)
	Calculate the bounding rectangle of a series subset. More...
QWT_EXPORT QRectF	qwtBoundingRect (const QwtSeriesData< QwtSetSample > &, int from=0, int to=-1)
	Calculate the bounding rectangle of a series subset. More...
QWT_EXPORT QRectF	qwtBoundingRect (const QwtSeriesData< QwtOHLCSample > &, int from=0, int to=-1)
	Calculate the bounding rectangle of a series subset. More...
QWT_EXPORT QRectF	qwtBoundingRect (const QwtSeriesData< QwtVectorFieldSample > &, int from=0, int to=-1)
	Calculate the bounding rectangle of a series subset. More...
template<typename T , typename LessThan >
int	qwtUpperSampleIndex (const QwtSeriesData< T > &series, double value, LessThan lessThan)

Function Documentation

qwtBoundingRect() [1/7]

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 136 of file qwt_series_data.cpp.

qwtBoundingRect() [2/7]

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 152 of file qwt_series_data.cpp.

qwtBoundingRect() [3/7]

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 172 of file qwt_series_data.cpp.

qwtBoundingRect() [4/7]

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 189 of file qwt_series_data.cpp.

qwtBoundingRect() [5/7]

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 223 of file qwt_series_data.cpp.

qwtBoundingRect() [6/7]

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 206 of file qwt_series_data.cpp.

qwtBoundingRect() [7/7]

QWT_EXPORT QRectF qwtBoundingRect	(	const QwtSeriesData< QwtVectorFieldSample > &	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 240 of file qwt_series_data.cpp.

qwtUpperSampleIndex()

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

Definition at line 347 of file qwt_series_data.h.