QwtPixelMatrix(3)

📦
version 6.3.0 · 4 versions
, in alpine 3.24

💅 QwtPixelMatrix(3) — Library Functions Manual

okay so bestie, welcome to the glow-up of QwtPixelMatrix, straight out of the Library Functions Manual. Buckle up, this one's a little bit iconic ✨

🌸 NAME 🌸

QwtPixelMatrix — a bit field that corresponds to the pixels of a rectangle. literally a whole grid of pixels but make it a bit field 💖

🦋 SYNOPSIS 🦋

#include <qwt_pixel_matrix.h>

Inherits QBitArray 👑 (yes she's got lineage)

✨ Public Member Functions ✨

  • QwtPixelMatrix(const QRect &rect) — Constructor. 🎀
  • ~QwtPixelMatrix() — Destructor. bye bestie 💜
  • 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. fr fr, that's her whole job — she's the bouncer at the club checking if you already got in 💅

Definition at line 24 of file qwt_pixel_matrix.h.

🎀 Constructor & Destructor Documentation 🎀

QwtPixelMatrix::QwtPixelMatrix(const QRect & rect) [explicit]

Constructor. ✨ birth of an icon ✨

Parameters

  • rect — Bounding rectangle for the matrix
Definition at line 17 of file qwt_pixel_matrix.cpp.

QwtPixelMatrix::~QwtPixelMatrix()

Destructor. she's logging off, no cap 😭

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. like, all of them, gone, wiped, ghosted 💀
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. the way she does both at once?? main character energy 🔥

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. vibe check on a single pixel 🔍✨

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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aaaaand that's the whole page bestie, you ate that 🫶 slay, periodt, go forth and dedupe your points 💅✨

— with love, from the Qwt User's Guide (generated by Doxygen, sourced from the source code) 🎀

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