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

NAME  SYNOPSIS  Public Member Functions  Public Attributes  Detailed Description  Constructor & Destructor Documentation  QwtPixelMatrix::QwtPixelMatrix (const QRect & rect) [explicit]  QwtPixelMatrix::˜QwtPixelMatrix ()  Member Function Documentation  QRect QwtPixelMatrix::rect () const  void QwtPixelMatrix::setRect (const QRect & rect)  bool QwtPixelMatrix::testAndSetPixel (int x, int y, bool on) [inline]  bool QwtPixelMatrix::testPixel (int x, int y) const [inline]  Member Data Documentation  int QwtPixelMatrix::const  Author 

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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.

QwtPixelMatrix::˜QwtPixelMatrix ()

Destructor.

Definition at line 24 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.

Member Data Documentation

int QwtPixelMatrix::const

Definition at line 36 of file qwt_pixel_matrix.h.

Author

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