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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">spreadsheetitem.cpp Example File</h1> <span class="small-subtitle">demos/spreadsheet/spreadsheetitem.cpp</span> <!-- $$$demos/spreadsheet/spreadsheetitem.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the demonstration applications of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** 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 Digia. For licensing terms and ** conditions see http://qt.digia.com/licensing. For further information ** use the contact form at http://qt.digia.com/contact-us. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Digia gives you certain additional ** rights. These rights are described in the Digia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 3.0 as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU General Public License version 3.0 requirements will be ** met: http://www.gnu.org/copyleft/gpl.html. ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/</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="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="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="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="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="qt.html">Qt</a></span><span class="operator">::</span>DisplayRole) <span class="keyword">return</span> display(); <span class="type"><a href="qstring.html">QString</a></span> t <span class="operator">=</span> display()<span class="operator">.</span>toString(); <span class="type">bool</span> 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="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="qvariant.html">QVariant</a></span><span class="operator">::</span>fromValue(<span class="type"><a href="qcolor.html">QColor</a></span>(<span class="type"><a href="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="qvariant.html">QVariant</a></span><span class="operator">::</span>fromValue(<span class="type"><a href="qcolor.html">QColor</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>red)); <span class="keyword">return</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>fromValue(<span class="type"><a href="qcolor.html">QColor</a></span>(<span class="type"><a href="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="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="qt.html">Qt</a></span><span class="operator">::</span>AlignRight <span class="operator">|</span> <span class="type"><a href="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="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="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="qvariant.html">QVariant</a></span>(); isResolving <span class="operator">=</span> <span class="keyword">true</span>; <span class="type"><a href="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="qvariant.html">QVariant</a></span> SpreadSheetItem<span class="operator">::</span>computeFormula(<span class="keyword">const</span> <span class="type"><a href="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 s tring is actually a formula or not</span> <span class="type"><a href="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="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="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="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> <!-- @@@demos/spreadsheet/spreadsheetitem.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its subsidiaries. Documentation contributions included herein are the copyrights of their respective owners.</p> <br /> <p> 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.</p> <p> Documentation sources may be obtained from <a href="http://www.qt-project.org"> www.qt-project.org</a>.</p> <br /> <p> Digia, Qt and their respective logos are trademarks of Digia Plc in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. <a title="Privacy Policy" href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p> </div> <script src="scripts/functions.js" type="text/javascript"></script> </body> </html>