369 lines
25 KiB
HTML
369 lines
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<h1 class="title">spreadsheetitem.cpp Example File</h1>
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<span class="small-subtitle">demos/spreadsheet/spreadsheetitem.cpp</span>
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<!-- $$$demos/spreadsheet/spreadsheetitem.cpp-description -->
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<div class="descr"> <a name="details"></a>
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<pre class="cpp"> <span class="comment">/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** $QT_END_LICENSE$
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**
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****************************************************************************/</span>
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<span class="preprocessor">#include "spreadsheetitem.h"</span>
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SpreadSheetItem<span class="operator">::</span>SpreadSheetItem()
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: <span class="type"><a href="qtablewidgetitem.html">QTableWidgetItem</a></span>()<span class="operator">,</span> isResolving(<span class="keyword">false</span>)
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{
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}
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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)
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: <span class="type"><a href="qtablewidgetitem.html">QTableWidgetItem</a></span>(text)<span class="operator">,</span> isResolving(<span class="keyword">false</span>)
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{
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}
|
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|
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<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>
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{
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SpreadSheetItem <span class="operator">*</span>item <span class="operator">=</span> <span class="keyword">new</span> SpreadSheetItem();
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<span class="operator">*</span>item <span class="operator">=</span> <span class="operator">*</span><span class="keyword">this</span>;
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<span class="keyword">return</span> item;
|
|
}
|
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|
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<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>
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|
{
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<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)
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<span class="keyword">return</span> formula();
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<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)
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<span class="keyword">return</span> display();
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|
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<span class="type"><a href="qstring.html">QString</a></span> t <span class="operator">=</span> display()<span class="operator">.</span>toString();
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<span class="type">bool</span> isNumber <span class="operator">=</span> <span class="keyword">false</span>;
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<span class="type">int</span> number <span class="operator">=</span> t<span class="operator">.</span>toInt(<span class="operator">&</span>isNumber);
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<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) {
|
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<span class="keyword">if</span> (<span class="operator">!</span>isNumber)
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|
<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));
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<span class="keyword">else</span> <span class="keyword">if</span> (number <span class="operator"><</span> <span class="number">0</span>)
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<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));
|
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<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));
|
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}
|
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|
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<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);
|
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|
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<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)
|
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{
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|
<span class="type"><a href="qtablewidgetitem.html">QTableWidgetItem</a></span><span class="operator">::</span>setData(role<span class="operator">,</span> value);
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|
<span class="keyword">if</span> (tableWidget())
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|
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>
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{
|
|
<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>
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|
<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>
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|
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<span></span>
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<p>
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<acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd.
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Documentation contributions included herein are the copyrights of
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their respective owners.</p>
|
|
<br />
|
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<p>
|
|
The documentation provided herein is licensed under the terms of the
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<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>
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<p>
|
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Documentation sources may be obtained from <a href="http://www.qt-project.org">
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www.qt-project.org</a>.</p>
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<br />
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<p>
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Qt and respective logos are trademarks of The Qt Company Ltd
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in Finland and/or other countries worldwide. All other trademarks are property
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of their respective owners. <a title="Privacy Policy"
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href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p>
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