<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>gameoflifemodel.cpp Example File | Qt Quick 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtquick-index.html">Qt Quick</a></td><td ><a href="qtquick-tableview-gameoflife-example.html">Qt Quick TableView examples - Conway’s Game of Life</a></td><td >gameoflifemodel.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtquick-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">gameoflifemodel.cpp Example File</h1> <span class="subtitle">tableview/gameoflife/gameoflifemodel.cpp</span> <!-- $$$tableview/gameoflife/gameoflifemodel.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2018 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "gameoflifemodel.h"</span> <span class="preprocessor">#include <QFile></span> <span class="preprocessor">#include <QTextStream></span> <span class="preprocessor">#include <QRect></span> GameOfLifeModel<span class="operator">::</span>GameOfLifeModel(<span class="type">QObject</span> <span class="operator">*</span>parent) : <span class="type">QAbstractTableModel</span>(parent) { clear(); } <span class="type">int</span> GameOfLifeModel<span class="operator">::</span>rowCount(<span class="keyword">const</span> <span class="type">QModelIndex</span> <span class="operator">&</span>parent) <span class="keyword">const</span> { <span class="keyword">if</span> (parent<span class="operator">.</span>isValid()) <span class="keyword">return</span> <span class="number">0</span>; <span class="keyword">return</span> height; } <span class="type">int</span> GameOfLifeModel<span class="operator">::</span>columnCount(<span class="keyword">const</span> <span class="type">QModelIndex</span> <span class="operator">&</span>parent) <span class="keyword">const</span> { <span class="keyword">if</span> (parent<span class="operator">.</span>isValid()) <span class="keyword">return</span> <span class="number">0</span>; <span class="keyword">return</span> width; } <span class="type">QVariant</span> GameOfLifeModel<span class="operator">::</span>data(<span class="keyword">const</span> <span class="type">QModelIndex</span> <span class="operator">&</span>index<span class="operator">,</span> <span class="type">int</span> role) <span class="keyword">const</span> { <span class="keyword">if</span> (<span class="operator">!</span>index<span class="operator">.</span>isValid() <span class="operator">|</span><span class="operator">|</span> role <span class="operator">!</span><span class="operator">=</span> CellRole) <span class="keyword">return</span> <span class="type">QVariant</span>(); <span class="keyword">return</span> <span class="type">QVariant</span>(m_currentState<span class="operator">[</span>cellIndex({index<span class="operator">.</span>column()<span class="operator">,</span> index<span class="operator">.</span>row()})<span class="operator">]</span>); } bool GameOfLifeModel<span class="operator">::</span>setData(<span class="keyword">const</span> <span class="type">QModelIndex</span> <span class="operator">&</span>index<span class="operator">,</span> <span class="keyword">const</span> <span class="type">QVariant</span> <span class="operator">&</span>value<span class="operator">,</span> <span class="type">int</span> role) { <span class="keyword">if</span> (role <span class="operator">!</span><span class="operator">=</span> CellRole <span class="operator">|</span><span class="operator">|</span> data(index<span class="operator">,</span> role) <span class="operator">=</span><span class="operator">=</span> value) <span class="keyword">return</span> <span class="keyword">false</span>; m_currentState<span class="operator">[</span>cellIndex({index<span class="operator">.</span>column()<span class="operator">,</span> index<span class="operator">.</span>row()})<span class="operator">]</span> <span class="operator">=</span> value<span class="operator">.</span>toBool(); <span class="keyword">emit</span> dataChanged(index<span class="operator">,</span> index<span class="operator">,</span> {role}); <span class="keyword">return</span> <span class="keyword">true</span>; } <span class="type">Qt</span><span class="operator">::</span>ItemFlags GameOfLifeModel<span class="operator">::</span>flags(<span class="keyword">const</span> <span class="type">QModelIndex</span> <span class="operator">&</span>index) <span class="keyword">const</span> { <span class="keyword">if</span> (<span class="operator">!</span>index<span class="operator">.</span>isValid()) <span class="keyword">return</span> <span class="type">Qt</span><span class="operator">::</span>NoItemFlags; <span class="keyword">return</span> <span class="type">Qt</span><span class="operator">::</span>ItemIsEditable; } <span class="type">void</span> GameOfLifeModel<span class="operator">::</span>nextStep() { StateContainer newValues; <span class="keyword">for</span> (std<span class="operator">::</span>size_t i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> size; <span class="operator">+</span><span class="operator">+</span>i) { bool currentState <span class="operator">=</span> m_currentState<span class="operator">[</span>i<span class="operator">]</span>; <span class="type">int</span> cellNeighborsCount <span class="operator">=</span> <span class="keyword">this</span><span class="operator">-</span><span class="operator">></span>cellNeighborsCount(cellCoordinatesFromIndex(<span class="keyword">static_cast</span><span class="operator"><</span><span class="type">int</span><span class="operator">></span>(i))); newValues<span class="operator">[</span>i<span class="operator">]</span> <span class="operator">=</span> currentState <span class="operator">=</span><span class="operator">=</span> <span class="keyword">true</span> <span class="operator">?</span> cellNeighborsCount <span class="operator">=</span><span class="operator">=</span> <span class="number">2</span> <span class="operator">|</span><span class="operator">|</span> cellNeighborsCount <span class="operator">=</span><span class="operator">=</span> <span class="number">3</span> : cellNeighborsCount <span class="operator">=</span><span class="operator">=</span> <span class="number">3</span>; } m_currentState <span class="operator">=</span> std<span class="operator">::</span>move(newValues); <span class="keyword">emit</span> dataChanged(index(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>)<span class="operator">,</span> index(height <span class="operator">-</span> <span class="number">1</span><span class="operator">,</span> width <span class="operator">-</span> <span class="number">1</span>)<span class="operator">,</span> {CellRole}); } bool GameOfLifeModel<span class="operator">::</span>loadFile(<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>fileName) { <span class="type">QFile</span> file(fileName); <span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">.</span>open(<span class="type">QIODevice</span><span class="operator">::</span>ReadOnly)) <span class="keyword">return</span> <span class="keyword">false</span>; <span class="type">QTextStream</span> in(<span class="operator">&</span>file); loadPattern(in<span class="operator">.</span>readAll()); <span class="keyword">return</span> <span class="keyword">true</span>; } <span class="type">void</span> GameOfLifeModel<span class="operator">::</span>loadPattern(<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>plainText) { clear(); <span class="type">QStringList</span> rows <span class="operator">=</span> plainText<span class="operator">.</span>split(<span class="string">"\n"</span>); <span class="type">QSize</span> patternSize(<span class="number">0</span><span class="operator">,</span> rows<span class="operator">.</span>count()); <span class="keyword">for</span> (<span class="type">QString</span> row : rows) { <span class="keyword">if</span> (row<span class="operator">.</span>size() <span class="operator">></span> patternSize<span class="operator">.</span>width()) patternSize<span class="operator">.</span>setWidth(row<span class="operator">.</span>size()); } <span class="type">QPoint</span> patternLocation((width <span class="operator">-</span> patternSize<span class="operator">.</span>width()) <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> (height <span class="operator">-</span> patternSize<span class="operator">.</span>height()) <span class="operator">/</span> <span class="number">2</span>); <span class="keyword">for</span> (<span class="type">int</span> y <span class="operator">=</span> <span class="number">0</span>; y <span class="operator"><</span> patternSize<span class="operator">.</span>height(); <span class="operator">+</span><span class="operator">+</span>y) { <span class="keyword">const</span> <span class="type">QString</span> line <span class="operator">=</span> rows<span class="operator">[</span>y<span class="operator">]</span>; <span class="keyword">for</span> (<span class="type">int</span> x <span class="operator">=</span> <span class="number">0</span>; x <span class="operator"><</span> line<span class="operator">.</span>length(); <span class="operator">+</span><span class="operator">+</span>x) { <span class="type">QPoint</span> cellPosition(x <span class="operator">+</span> patternLocation<span class="operator">.</span>x()<span class="operator">,</span> y <span class="operator">+</span> patternLocation<span class="operator">.</span>y()); m_currentState<span class="operator">[</span>cellIndex(cellPosition)<span class="operator">]</span> <span class="operator">=</span> line<span class="operator">[</span>x<span class="operator">]</span> <span class="operator">=</span><span class="operator">=</span> <span class="char">'O'</span>; } } <span class="keyword">emit</span> dataChanged(index(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>)<span class="operator">,</span> index(height <span class="operator">-</span> <span class="number">1</span><span class="operator">,</span> width <span class="operator">-</span> <span class="number">1</span>)<span class="operator">,</span> {CellRole}); } <span class="type">void</span> GameOfLifeModel<span class="operator">::</span>clear() { m_currentState<span class="operator">.</span>fill(<span class="keyword">false</span>); <span class="keyword">emit</span> dataChanged(index(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>)<span class="operator">,</span> index(height <span class="operator">-</span> <span class="number">1</span><span class="operator">,</span> width <span class="operator">-</span> <span class="number">1</span>)<span class="operator">,</span> {CellRole}); } <span class="type">int</span> GameOfLifeModel<span class="operator">::</span>cellNeighborsCount(<span class="keyword">const</span> <span class="type">QPoint</span> <span class="operator">&</span>cellCoordinates) <span class="keyword">const</span> { <span class="type">int</span> count <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">for</span> (<span class="type">int</span> x <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>; x <span class="operator"><</span><span class="operator">=</span> <span class="number">1</span>; <span class="operator">+</span><span class="operator">+</span>x) { <span class="keyword">for</span> (<span class="type">int</span> y <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>; y <span class="operator"><</span><span class="operator">=</span> <span class="number">1</span>; <span class="operator">+</span><span class="operator">+</span>y) { <span class="keyword">if</span> (x <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> y <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) <span class="keyword">continue</span>; <span class="keyword">const</span> <span class="type">QPoint</span> neighborPosition { cellCoordinates<span class="operator">.</span>x() <span class="operator">+</span> x<span class="operator">,</span> cellCoordinates<span class="operator">.</span>y() <span class="operator">+</span> y }; <span class="keyword">if</span> (<span class="operator">!</span>areCellCoordinatesValid(neighborPosition)) <span class="keyword">continue</span>; <span class="keyword">if</span> (m_currentState<span class="operator">[</span>cellIndex(neighborPosition)<span class="operator">]</span>) <span class="operator">+</span><span class="operator">+</span>count; <span class="keyword">if</span> (count <span class="operator">></span> <span class="number">3</span>) <span class="keyword">return</span> count; } } <span class="keyword">return</span> count; } bool GameOfLifeModel<span class="operator">::</span>areCellCoordinatesValid(<span class="keyword">const</span> <span class="type">QPoint</span> <span class="operator">&</span>coordinates) { <span class="keyword">return</span> <span class="type">QRect</span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> width<span class="operator">,</span> height)<span class="operator">.</span>contains(coordinates); } <span class="type">QPoint</span> GameOfLifeModel<span class="operator">::</span>cellCoordinatesFromIndex(<span class="type">int</span> cellIndex) { <span class="keyword">return</span> {cellIndex <span class="operator">%</span> width<span class="operator">,</span> cellIndex <span class="operator">/</span> width}; } std<span class="operator">::</span>size_t GameOfLifeModel<span class="operator">::</span>cellIndex(<span class="keyword">const</span> <span class="type">QPoint</span> <span class="operator">&</span>coordinates) { <span class="keyword">return</span> std<span class="operator">::</span>size_t(coordinates<span class="operator">.</span>y() <span class="operator">*</span> width <span class="operator">+</span> coordinates<span class="operator">.</span>x()); } </pre> </div> <!-- @@@tableview/gameoflife/gameoflifemodel.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>