qwtseriesdata(3) [debian man page]

QwtSeriesData(3)						 Qwt User's Guide						  QwtSeriesData(3)

NAME

       QwtSeriesData -

       Abstract interface for iterating over samples.

SYNOPSIS

       #include <qwt_series_data.h>

       Inherited by QwtArraySeriesData< T >.

   Public Member Functions
       QwtSeriesData ()
       virtual ~QwtSeriesData ()
       virtual size_t size () const =0
       virtual T sample (size_t i) const =0
       virtual QRectF boundingRect () const =0
       virtual void setRectOfInterest (const QRectF &)

   Protected Attributes
       QRectF d_boundingRect

Detailed Description
   template<typename T> class QwtSeriesData< T >
       Abstract interface for iterating over samples.

       Qwt offers several implementations of the QwtSeriesData API, but in situations, where data of an application specific format needs to be
       displayed, without having to copy it, it is recommended to implement an individual data access.

Constructor &; Destructor Documentation
   template<typename T > QwtSeriesData< T >::QwtSeriesData ()
       Constructor.

   template<typename T > QwtSeriesData< T >::~QwtSeriesData () [virtual]
       Destructor.

Member Function Documentation
   template<typename T> virtual QRectF QwtSeriesData< T >::boundingRect () const [pure virtual] Calculate the bounding rect of all samples
       The bounding rect is necessary for autoscaling and can be used for a couple of painting optimizations.

       qwtBoundingRect(...) offers slow implementations iterating over the samples. For large sets it is recommended to implement something faster
       f.e. by caching the bounding rect.

       Implemented in QwtPointSeriesData, QwtPoint3DSeriesData, QwtIntervalSeriesData, QwtSetSeriesData, QwtPointArrayData, QwtCPointerData, and
       QwtSyntheticPointData.

   template<typename T> virtual T QwtSeriesData< T >::sample (size_ti) const [pure virtual] Return a sample
       Parameters:
	   i Index

       Returns:
	   Sample at position i

       Implemented in QwtArraySeriesData< T >, QwtPointArrayData, QwtCPointerData, QwtSyntheticPointData, QwtArraySeriesData< QwtIntervalSample >,
       QwtArraySeriesData< QPointF >, QwtArraySeriesData< QwtPoint3D >, and QwtArraySeriesData< QwtSetSample >.

   template<typename T > void QwtSeriesData< T >::setRectOfInterest (const QRectF &) [virtual] Set a the 'rect of interest'
       QwtPlotSeriesItem defines the current area of the plot canvas as 'rect of interest' ( QwtPlotSeriesItem::updateScaleDiv() ). It can be used
       to implement different levels of details.

       The default implementation does nothing.

       Reimplemented in QwtSyntheticPointData.

   template<typename T> virtual size_t QwtSeriesData< T >::size () const [pure virtual] Returns:
	   Number of samples

       Implemented in QwtArraySeriesData< T >, QwtPointArrayData, QwtCPointerData, QwtSyntheticPointData, QwtArraySeriesData< QwtIntervalSample >,
       QwtArraySeriesData< QPointF >, QwtArraySeriesData< QwtPoint3D >, and QwtArraySeriesData< QwtSetSample >.

Member Data Documentation
   template<typename T> QRectF QwtSeriesData< T >::d_boundingRect [mutable, protected]
       Can be used to cache a calculated bounding rectangle.

Author
       Generated automatically by Doxygen for Qwt User's Guide from the source code.

Version 6.0.0							  Fri Apr 15 2011						  QwtSeriesData(3)

Check Out this Related Man Page

QwtPointArrayData(3)						 Qwt User's Guide					      QwtPointArrayData(3)

NAME

       QwtPointArrayData -

       Interface for iterating over two QVector<double> objects.

SYNOPSIS

       #include <qwt_series_data.h>

       Inherits QwtSeriesData< QPointF >.

   Public Member Functions
       QwtPointArrayData (const QVector< double > &x, const QVector< double > &y)
       QwtPointArrayData (const double *x, const double *y, size_t size)
       virtual QRectF boundingRect () const
       virtual size_t size () const
       virtual QPointF sample (size_t i) const
       const QVector< double > & xData () const
       const QVector< double > & yData () const

Detailed Description
       Interface for iterating over two QVector<double> objects.

Constructor &; Destructor Documentation
   QwtPointArrayData::QwtPointArrayData (const QVector< double > &x, const QVector< double > &y) Constructor
       Parameters:
	   x Array of x values
	   y Array of y values

       See also:
	   QwtPlotCurve::setData(), QwtPlotCurve::setSamples()

   QwtPointArrayData::QwtPointArrayData (const double *x, const double *y, size_tsize) Constructor
       Parameters:
	   x Array of x values
	   y Array of y values
	   size Size of the x and y arrays

       See also:
	   QwtPlotCurve::setData(), QwtPlotCurve::setSamples()

Member Function Documentation
   QRectF QwtPointArrayData::boundingRect () const [virtual]
       Calculate the bounding rect. The bounding rectangle is calculated once by iterating over all points and is stored for all following
       requests.

       Returns:
	   Bounding rectangle

       Implements QwtSeriesData< QPointF >.

   QPointF QwtPointArrayData::sample (size_ti) const [virtual] Return the sample at position i
       Parameters:
	   i Index

       Returns:
	   Sample at position i

       Implements QwtSeriesData< QPointF >.

   size_t QwtPointArrayData::size () const [virtual] Returns:
	   Size of the data set

       Implements QwtSeriesData< QPointF >.

   const QVector< double > & QwtPointArrayData::xData () const Returns:
	   Array of the x-values

   const QVector< double > & QwtPointArrayData::yData () const Returns:
	   Array of the y-values

Author
       Generated automatically by Doxygen for Qwt User's Guide from the source code.

Version 6.0.0							  Fri Apr 15 2011					      QwtPointArrayData(3)

Linux and UNIX Man Pages

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