<?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>stardelegate.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-stardelegate-example.html">Star Delegate Example</a></td><td >stardelegate.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">stardelegate.cpp Example File</h1> <span class="subtitle">itemviews/stardelegate/stardelegate.cpp</span> <!-- $$$itemviews/stardelegate/stardelegate.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 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 <QtWidgets></span> <span class="preprocessor">#include "stardelegate.h"</span> <span class="preprocessor">#include "stareditor.h"</span> <span class="preprocessor">#include "starrating.h"</span> <span class="type">void</span> StarDelegate<span class="operator">::</span>paint(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> <span class="operator">*</span>painter<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstyleoptionviewitem.html">QStyleOptionViewItem</a></span> <span class="operator">&</span>option<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>index) <span class="keyword">const</span> { <span class="keyword">if</span> (index<span class="operator">.</span>data()<span class="operator">.</span>canConvert<span class="operator"><</span>StarRating<span class="operator">></span>()) { StarRating starRating <span class="operator">=</span> qvariant_cast<span class="operator"><</span>StarRating<span class="operator">></span>(index<span class="operator">.</span>data()); <span class="keyword">if</span> (option<span class="operator">.</span>state <span class="operator">&</span> <span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>State_Selected) painter<span class="operator">-</span><span class="operator">></span>fillRect(option<span class="operator">.</span>rect<span class="operator">,</span> option<span class="operator">.</span>palette<span class="operator">.</span>highlight()); starRating<span class="operator">.</span>paint(painter<span class="operator">,</span> option<span class="operator">.</span>rect<span class="operator">,</span> option<span class="operator">.</span>palette<span class="operator">,</span> StarRating<span class="operator">::</span>ReadOnly); } <span class="keyword">else</span> { <span class="type"><a href="qstyleditemdelegate.html">QStyledItemDelegate</a></span><span class="operator">::</span>paint(painter<span class="operator">,</span> option<span class="operator">,</span> index); } } <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> StarDelegate<span class="operator">::</span>sizeHint(<span class="keyword">const</span> <span class="type"><a href="qstyleoptionviewitem.html">QStyleOptionViewItem</a></span> <span class="operator">&</span>option<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>index) <span class="keyword">const</span> { <span class="keyword">if</span> (index<span class="operator">.</span>data()<span class="operator">.</span>canConvert<span class="operator"><</span>StarRating<span class="operator">></span>()) { StarRating starRating <span class="operator">=</span> qvariant_cast<span class="operator"><</span>StarRating<span class="operator">></span>(index<span class="operator">.</span>data()); <span class="keyword">return</span> starRating<span class="operator">.</span>sizeHint(); } <span class="keyword">else</span> { <span class="keyword">return</span> <span class="type"><a href="qstyleditemdelegate.html">QStyledItemDelegate</a></span><span class="operator">::</span>sizeHint(option<span class="operator">,</span> index); } } <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>StarDelegate<span class="operator">::</span>createEditor(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstyleoptionviewitem.html">QStyleOptionViewItem</a></span> <span class="operator">&</span>option<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>index) <span class="keyword">const</span> { <span class="keyword">if</span> (index<span class="operator">.</span>data()<span class="operator">.</span>canConvert<span class="operator"><</span>StarRating<span class="operator">></span>()) { StarEditor <span class="operator">*</span>editor <span class="operator">=</span> <span class="keyword">new</span> StarEditor(parent); connect(editor<span class="operator">,</span> <span class="operator">&</span>StarEditor<span class="operator">::</span>editingFinished<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>StarDelegate<span class="operator">::</span>commitAndCloseEditor); <span class="keyword">return</span> editor; } <span class="keyword">else</span> { <span class="keyword">return</span> <span class="type"><a href="qstyleditemdelegate.html">QStyledItemDelegate</a></span><span class="operator">::</span>createEditor(parent<span class="operator">,</span> option<span class="operator">,</span> index); } } <span class="type">void</span> StarDelegate<span class="operator">::</span>setEditorData(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>editor<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>index) <span class="keyword">const</span> { <span class="keyword">if</span> (index<span class="operator">.</span>data()<span class="operator">.</span>canConvert<span class="operator"><</span>StarRating<span class="operator">></span>()) { StarRating starRating <span class="operator">=</span> qvariant_cast<span class="operator"><</span>StarRating<span class="operator">></span>(index<span class="operator">.</span>data()); StarEditor <span class="operator">*</span>starEditor <span class="operator">=</span> qobject_cast<span class="operator"><</span>StarEditor <span class="operator">*</span><span class="operator">></span>(editor); starEditor<span class="operator">-</span><span class="operator">></span>setStarRating(starRating); } <span class="keyword">else</span> { <span class="type"><a href="qstyleditemdelegate.html">QStyledItemDelegate</a></span><span class="operator">::</span>setEditorData(editor<span class="operator">,</span> index); } } <span class="type">void</span> StarDelegate<span class="operator">::</span>setModelData(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>editor<span class="operator">,</span> <span class="type"><a href="../qtcore/qabstractitemmodel.html">QAbstractItemModel</a></span> <span class="operator">*</span>model<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>index) <span class="keyword">const</span> { <span class="keyword">if</span> (index<span class="operator">.</span>data()<span class="operator">.</span>canConvert<span class="operator"><</span>StarRating<span class="operator">></span>()) { StarEditor <span class="operator">*</span>starEditor <span class="operator">=</span> qobject_cast<span class="operator"><</span>StarEditor <span class="operator">*</span><span class="operator">></span>(editor); model<span class="operator">-</span><span class="operator">></span>setData(index<span class="operator">,</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span><span class="operator">::</span>fromValue(starEditor<span class="operator">-</span><span class="operator">></span>starRating())); } <span class="keyword">else</span> { <span class="type"><a href="qstyleditemdelegate.html">QStyledItemDelegate</a></span><span class="operator">::</span>setModelData(editor<span class="operator">,</span> model<span class="operator">,</span> index); } } <span class="type">void</span> StarDelegate<span class="operator">::</span>commitAndCloseEditor() { StarEditor <span class="operator">*</span>editor <span class="operator">=</span> qobject_cast<span class="operator"><</span>StarEditor <span class="operator">*</span><span class="operator">></span>(sender()); <span class="keyword">emit</span> commitData(editor); <span class="keyword">emit</span> closeEditor(editor); } </pre> </div> <!-- @@@itemviews/stardelegate/stardelegate.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>