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

NAME
       QwtPixelMatrix - A bit field corresponding to the pixels of a
       rectangle.


SYNOPSIS
       #include <qwt_pixel_matrix.h>

       Inherits QBitArray.

   Public Member Functions
       QwtPixelMatrix (const QRect &rect)
           Constructor.
       ~QwtPixelMatrix ()
           Destructor.
       void setRect (const QRect &rect)
       QRect rect () const
       bool testPixel (int x, int y) const
           Test if a pixel has been set.
       bool testAndSetPixel (int x, int y, bool on)
           Set a pixel and test if a pixel has been set before.

   Public Attributes
       int const

Detailed Description
       A bit field corresponding to the pixels of a rectangle.

       QwtPixelMatrix is intended to filter out duplicates in an unsorted
       array of points.

       Definition at line 24 of file qwt_pixel_matrix.h.

Constructor & Destructor Documentation
   QwtPixelMatrix::QwtPixelMatrix (const QRect & rect) [explicit]
       Constructor.

       Parameters
           rect Bounding rectangle for the matrix

       Definition at line 17 of file qwt_pixel_matrix.cpp.

Member Function Documentation
   QRect QwtPixelMatrix::rect () const
       Returns
           Bounding rectangle

       Definition at line 48 of file qwt_pixel_matrix.cpp.

   void QwtPixelMatrix::setRect (const QRect & rect)
       Set the bounding rectangle of the matrix

       Parameters
           rect Bounding rectangle

       Note
           All bits are cleared

       Definition at line 35 of file qwt_pixel_matrix.cpp.

   bool QwtPixelMatrix::testAndSetPixel (int x, int y, bool on) [inline]
       Set a pixel and test if a pixel has been set before.

       Parameters
           x X-coordinate
           y Y-coordinate
           on Set/Clear the pixel

       Returns
           true, when pos is outside of rect(), or when the pixel was set
           before.

       Definition at line 67 of file qwt_pixel_matrix.h.

   bool QwtPixelMatrix::testPixel (int x, int y) const [inline]
       Test if a pixel has been set.

       Parameters
           x X-coordinate
           y Y-coordinate

       Returns
           true, when pos is outside of rect(), or when the pixel has already
           been set.

       Definition at line 51 of file qwt_pixel_matrix.h.


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

Version 6.2.0                   Sun Jul 18 2021              QwtPixelMatrix(3)