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)

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

NAME

       QwtCPointerData -

       Data class containing two pointers to memory blocks of doubles.

SYNOPSIS

       #include <qwt_data.h>

       Inherits QwtData.

   Public Member Functions
       virtual QwtDoubleRect boundingRect () const
       virtual QwtData * copy () const
       QwtCPointerData & operator= (const QwtCPointerData &)
       QwtCPointerData (const double *x, const double *y, size_t size)
       virtual size_t size () const
       virtual double x (size_t i) const
       const double * xData () const
       virtual double y (size_t i) const
       const double * yData () const

Detailed Description
       Data class containing two pointers to memory blocks of doubles.

Constructor &; Destructor Documentation
   QwtCPointerData::QwtCPointerData (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

       Warning:
	   The programmer must assure that the memory blocks referenced by the pointers remain valid during the lifetime of the QwtPlotCPointer
	   object.

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

Member Function Documentation
   QwtDoubleRect QwtCPointerData::boundingRect () const [virtual] Returns the bounding rectangle of the data. If there is no bounding rect, like
       for empty data the rectangle is invalid: QwtDoubleRect::isValid() == false
       Reimplemented from QwtData.

   QwtData * QwtCPointerData::copy () const [virtual] Returns:
	   Pointer to a copy (virtual copy constructor)

       Implements QwtData.

   QwtCPointerData & QwtCPointerData::operator= (const QwtCPointerData &data)
       Assignment.

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

       Implements QwtData.

   double QwtCPointerData::x (size_ti) const [virtual] Return the x value of data point i
       Parameters:
	   i Index

       Returns:
	   x X value of data point i

       Implements QwtData.

   const double * QwtCPointerData::xData () const Returns:
	   Array of the x-values

   double QwtCPointerData::y (size_ti) const [virtual] Return the y value of data point i
       Parameters:
	   i Index

       Returns:
	   y Y value of data point i

       Implements QwtData.

   const double * QwtCPointerData::yData () const Returns:
	   Array of the y-values

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

Version 5.2.2							  Mon Aug 1 2011						QwtCPointerData(3)

Linux and UNIX Man Pages

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