<?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>spreadsheetitem.cpp Example File | Qt Widgets 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="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-itemviews-spreadsheet-example.html">Spreadsheet</a></td><td >spreadsheetitem.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtwidgets-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">spreadsheetitem.cpp Example File</h1> <span class="subtitle">itemviews/spreadsheet/spreadsheetitem.cpp</span> <!-- $$$itemviews/spreadsheet/spreadsheetitem.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the demonstration applications 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 "spreadsheetitem.h"</span> SpreadSheetItem<span class="operator">::</span>SpreadSheetItem() : <span class="type"><a href="qtablewidgetitem.html">QTableWidgetItem</a></span>()<span class="operator">,</span> isResolving(<span class="keyword">false</span>) { } SpreadSheetItem<span class="operator">::</span>SpreadSheetItem(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>text) : <span class="type"><a href="qtablewidgetitem.html">QTableWidgetItem</a></span>(text)<span class="operator">,</span> isResolving(<span class="keyword">false</span>) { } <span class="type"><a href="qtablewidgetitem.html">QTableWidgetItem</a></span> <span class="operator">*</span>SpreadSheetItem<span class="operator">::</span>clone() <span class="keyword">const</span> { SpreadSheetItem <span class="operator">*</span>item <span class="operator">=</span> <span class="keyword">new</span> SpreadSheetItem(); <span class="operator">*</span>item <span class="operator">=</span> <span class="operator">*</span><span class="keyword">this</span>; <span class="keyword">return</span> item; } <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> SpreadSheetItem<span class="operator">::</span>data(<span class="type">int</span> role) <span class="keyword">const</span> { <span class="keyword">if</span> (role <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>EditRole <span class="operator">|</span><span class="operator">|</span> role <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>StatusTipRole) <span class="keyword">return</span> formula(); <span class="keyword">if</span> (role <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>DisplayRole) <span class="keyword">return</span> display(); <span class="type"><a href="../qtcore/qstring.html">QString</a></span> t <span class="operator">=</span> display()<span class="operator">.</span>toString(); bool isNumber <span class="operator">=</span> <span class="keyword">false</span>; <span class="type">int</span> number <span class="operator">=</span> t<span class="operator">.</span>toInt(<span class="operator">&</span>isNumber); <span class="keyword">if</span> (role <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>TextColorRole) { <span class="keyword">if</span> (<span class="operator">!</span>isNumber) <span class="keyword">return</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span><span class="operator">::</span>fromValue(<span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>black)); <span class="keyword">else</span> <span class="keyword">if</span> (number <span class="operator"><</span> <span class="number">0</span>) <span class="keyword">return</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span><span class="operator">::</span>fromValue(<span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>red)); <span class="keyword">return</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span><span class="operator">::</span>fromValue(<span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>blue)); } <span class="keyword">if</span> (role <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>TextAlignmentRole) <span class="keyword">if</span> (<span class="operator">!</span>t<span class="operator">.</span>isEmpty() <span class="operator">&</span><span class="operator">&</span> (t<span class="operator">.</span>at(<span class="number">0</span>)<span class="operator">.</span>isNumber() <span class="operator">|</span><span class="operator">|</span> t<span class="operator">.</span>at(<span class="number">0</span>) <span class="operator">=</span><span class="operator">=</span> <span class="char">'-'</span>)) <span class="keyword">return</span> (<span class="type">int</span>)(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AlignRight <span class="operator">|</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AlignVCenter); <span class="keyword">return</span> <span class="type"><a href="qtablewidgetitem.html">QTableWidgetItem</a></span><span class="operator">::</span>data(role); } <span class="type">void</span> SpreadSheetItem<span class="operator">::</span>setData(<span class="type">int</span> role<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> <span class="operator">&</span>value) { <span class="type"><a href="qtablewidgetitem.html">QTableWidgetItem</a></span><span class="operator">::</span>setData(role<span class="operator">,</span> value); <span class="keyword">if</span> (tableWidget()) tableWidget()<span class="operator">-</span><span class="operator">></span>viewport()<span class="operator">-</span><span class="operator">></span>update(); } <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> SpreadSheetItem<span class="operator">::</span>display() <span class="keyword">const</span> { <span class="comment">// avoid circular dependencies</span> <span class="keyword">if</span> (isResolving) <span class="keyword">return</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>(); isResolving <span class="operator">=</span> <span class="keyword">true</span>; <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> result <span class="operator">=</span> computeFormula(formula()<span class="operator">,</span> tableWidget()<span class="operator">,</span> <span class="keyword">this</span>); isResolving <span class="operator">=</span> <span class="keyword">false</span>; <span class="keyword">return</span> result; } <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> SpreadSheetItem<span class="operator">::</span>computeFormula(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>formula<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qtablewidget.html">QTableWidget</a></span> <span class="operator">*</span>widget<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qtablewidgetitem.html">QTableWidgetItem</a></span> <span class="operator">*</span>self) { <span class="comment">// check if the string is actually a formula or not</span> <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> list <span class="operator">=</span> formula<span class="operator">.</span>split(<span class="char">' '</span>); <span class="keyword">if</span> (list<span class="operator">.</span>isEmpty() <span class="operator">|</span><span class="operator">|</span> <span class="operator">!</span>widget) <span class="keyword">return</span> formula; <span class="comment">// it is a normal string</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> op <span class="operator">=</span> list<span class="operator">.</span>value(<span class="number">0</span>)<span class="operator">.</span>toLower(); <span class="type">int</span> firstRow <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>; <span class="type">int</span> firstCol <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>; <span class="type">int</span> secondRow <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>; <span class="type">int</span> secondCol <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>; <span class="keyword">if</span> (list<span class="operator">.</span>count() <span class="operator">></span> <span class="number">1</span>) decode_pos(list<span class="operator">.</span>value(<span class="number">1</span>)<span class="operator">,</span> <span class="operator">&</span>firstRow<span class="operator">,</span> <span class="operator">&</span>firstCol); <span class="keyword">if</span> (list<span class="operator">.</span>count() <span class="operator">></span> <span class="number">2</span>) decode_pos(list<span class="operator">.</span>value(<span class="number">2</span>)<span class="operator">,</span> <span class="operator">&</span>secondRow<span class="operator">,</span> <span class="operator">&</span>secondCol); <span class="keyword">const</span> <span class="type"><a href="qtablewidgetitem.html">QTableWidgetItem</a></span> <span class="operator">*</span>start <span class="operator">=</span> widget<span class="operator">-</span><span class="operator">></span>item(firstRow<span class="operator">,</span> firstCol); <span class="keyword">const</span> <span class="type"><a href="qtablewidgetitem.html">QTableWidgetItem</a></span> <span class="operator">*</span>end <span class="operator">=</span> widget<span class="operator">-</span><span class="operator">></span>item(secondRow<span class="operator">,</span> secondCol); <span class="type">int</span> firstVal <span class="operator">=</span> start <span class="operator">?</span> start<span class="operator">-</span><span class="operator">></span>text()<span class="operator">.</span>toInt() : <span class="number">0</span>; <span class="type">int</span> secondVal <span class="operator">=</span> end <span class="operator">?</span> end<span class="operator">-</span><span class="operator">></span>text()<span class="operator">.</span>toInt() : <span class="number">0</span>; <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> result; <span class="keyword">if</span> (op <span class="operator">=</span><span class="operator">=</span> <span class="string">"sum"</span>) { <span class="type">int</span> sum <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">for</span> (<span class="type">int</span> r <span class="operator">=</span> firstRow; r <span class="operator"><</span><span class="operator">=</span> secondRow; <span class="operator">+</span><span class="operator">+</span>r) { <span class="keyword">for</span> (<span class="type">int</span> c <span class="operator">=</span> firstCol; c <span class="operator"><</span><span class="operator">=</span> secondCol; <span class="operator">+</span><span class="operator">+</span>c) { <span class="keyword">const</span> <span class="type"><a href="qtablewidgetitem.html">QTableWidgetItem</a></span> <span class="operator">*</span>tableItem <span class="operator">=</span> widget<span class="operator">-</span><span class="operator">></span>item(r<span class="operator">,</span> c); <span class="keyword">if</span> (tableItem <span class="operator">&</span><span class="operator">&</span> tableItem <span class="operator">!</span><span class="operator">=</span> self) sum <span class="operator">+</span><span class="operator">=</span> tableItem<span class="operator">-</span><span class="operator">></span>text()<span class="operator">.</span>toInt(); } } result <span class="operator">=</span> sum; } <span class="keyword">else</span> <span class="keyword">if</span> (op <span class="operator">=</span><span class="operator">=</span> <span class="string">"+"</span>) { result <span class="operator">=</span> (firstVal <span class="operator">+</span> secondVal); } <span class="keyword">else</span> <span class="keyword">if</span> (op <span class="operator">=</span><span class="operator">=</span> <span class="string">"-"</span>) { result <span class="operator">=</span> (firstVal <span class="operator">-</span> secondVal); } <span class="keyword">else</span> <span class="keyword">if</span> (op <span class="operator">=</span><span class="operator">=</span> <span class="string">"*"</span>) { result <span class="operator">=</span> (firstVal <span class="operator">*</span> secondVal); } <span class="keyword">else</span> <span class="keyword">if</span> (op <span class="operator">=</span><span class="operator">=</span> <span class="string">"/"</span>) { <span class="keyword">if</span> (secondVal <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) result <span class="operator">=</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span>(<span class="string">"nan"</span>); <span class="keyword">else</span> result <span class="operator">=</span> (firstVal <span class="operator">/</span> secondVal); } <span class="keyword">else</span> <span class="keyword">if</span> (op <span class="operator">=</span><span class="operator">=</span> <span class="string">"="</span>) { <span class="keyword">if</span> (start) result <span class="operator">=</span> start<span class="operator">-</span><span class="operator">></span>text(); } <span class="keyword">else</span> { result <span class="operator">=</span> formula; } <span class="keyword">return</span> result; } </pre> </div> <!-- @@@itemviews/spreadsheet/spreadsheetitem.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>