<?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>pieview.h 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-chart-example.html">Chart Example</a></td><td >pieview.h 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">pieview.h Example File</h1> <span class="subtitle">itemviews/chart/pieview.h</span> <!-- $$$itemviews/chart/pieview.h-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">#ifndef PIEVIEW_H</span> <span class="preprocessor">#define PIEVIEW_H</span> <span class="preprocessor">#include <QAbstractItemView></span> <span class="keyword">class</span> PieView : <span class="keyword">public</span> <span class="type"><a href="qabstractitemview.html">QAbstractItemView</a></span> { Q_OBJECT <span class="keyword">public</span>: PieView(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent <span class="operator">=</span> nullptr); <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> visualRect(<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> override; <span class="type">void</span> scrollTo(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>index<span class="operator">,</span> ScrollHint hint <span class="operator">=</span> EnsureVisible) override; <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> indexAt(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span> <span class="operator">&</span>point) <span class="keyword">const</span> override; <span class="keyword">protected</span> <span class="keyword">slots</span>: <span class="type">void</span> dataChanged(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>topLeft<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>bottomRight<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qvector.html">QVector</a></span><span class="operator"><</span><span class="type">int</span><span class="operator">></span> <span class="operator">&</span>roles <span class="operator">=</span> <span class="type"><a href="../qtcore/qvector.html">QVector</a></span><span class="operator"><</span><span class="type">int</span><span class="operator">></span>()) override; <span class="type">void</span> rowsInserted(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>parent<span class="operator">,</span> <span class="type">int</span> start<span class="operator">,</span> <span class="type">int</span> end) override; <span class="type">void</span> rowsAboutToBeRemoved(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>parent<span class="operator">,</span> <span class="type">int</span> start<span class="operator">,</span> <span class="type">int</span> end) override; <span class="keyword">protected</span>: bool edit(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>index<span class="operator">,</span> EditTrigger trigger<span class="operator">,</span> <span class="type"><a href="../qtcore/qevent.html">QEvent</a></span> <span class="operator">*</span>event) override; <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> moveCursor(<span class="type"><a href="qabstractitemview.html">QAbstractItemView</a></span><span class="operator">::</span>CursorAction cursorAction<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>KeyboardModifiers modifiers) override; <span class="type">int</span> horizontalOffset() <span class="keyword">const</span> override; <span class="type">int</span> verticalOffset() <span class="keyword">const</span> override; bool isIndexHidden(<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> override; <span class="type">void</span> setSelection(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qrect.html">QRect</a></span><span class="operator">&</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qitemselectionmodel.html">QItemSelectionModel</a></span><span class="operator">::</span>SelectionFlags command) override; <span class="type">void</span> mousePressEvent(<span class="type"><a href="../qtgui/qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>event) override; <span class="type">void</span> mouseMoveEvent(<span class="type"><a href="../qtgui/qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>event) override; <span class="type">void</span> mouseReleaseEvent(<span class="type"><a href="../qtgui/qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>event) override; <span class="type">void</span> paintEvent(<span class="type"><a href="../qtgui/qpaintevent.html">QPaintEvent</a></span> <span class="operator">*</span>event) override; <span class="type">void</span> resizeEvent(<span class="type"><a href="../qtgui/qresizeevent.html">QResizeEvent</a></span> <span class="operator">*</span>event) override; <span class="type">void</span> scrollContentsBy(<span class="type">int</span> dx<span class="operator">,</span> <span class="type">int</span> dy) override; <span class="type"><a href="../qtgui/qregion.html">QRegion</a></span> visualRegionForSelection(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qitemselection.html">QItemSelection</a></span> <span class="operator">&</span>selection) <span class="keyword">const</span> override; <span class="keyword">private</span>: <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> itemRect(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>item) <span class="keyword">const</span>; <span class="type"><a href="../qtgui/qregion.html">QRegion</a></span> itemRegion(<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="type">int</span> rows(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span> <span class="operator">&</span>index <span class="operator">=</span> <span class="type"><a href="../qtcore/qmodelindex.html">QModelIndex</a></span>()) <span class="keyword">const</span>; <span class="type">void</span> updateGeometries() override; <span class="type">int</span> margin <span class="operator">=</span> <span class="number">0</span>; <span class="type">int</span> totalSize <span class="operator">=</span> <span class="number">300</span>; <span class="type">int</span> pieSize <span class="operator">=</span> totalSize <span class="operator">-</span> <span class="number">2</span> <span class="operator">*</span> margin; <span class="type">int</span> validItems <span class="operator">=</span> <span class="number">0</span>; <span class="type">double</span> totalValue <span class="operator">=</span> <span class="number">0.0</span>; <span class="type"><a href="qrubberband.html">QRubberBand</a></span> <span class="operator">*</span>rubberBand <span class="operator">=</span> nullptr; <span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span> origin; }; <span class="preprocessor">#endif // PIEVIEW_H</span> </pre> </div> <!-- @@@itemviews/chart/pieview.h --> </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>