<?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>draglabel.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-draganddrop-fridgemagnets-example.html">Fridge Magnets Example</a></td><td >draglabel.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">draglabel.cpp Example File</h1> <span class="subtitle">draganddrop/fridgemagnets/draglabel.cpp</span> <!-- $$$draganddrop/fridgemagnets/draglabel.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 "draglabel.h"</span> <span class="preprocessor">#include <QtWidgets></span> DragLabel<span class="operator">::</span>DragLabel(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>text<span class="operator">,</span> <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qlabel.html">QLabel</a></span>(parent) { <span class="type"><a href="../qtgui/qfontmetrics.html">QFontMetrics</a></span> metric(font()); <span class="type"><a href="../qtcore/qsize.html">QSize</a></span> size <span class="operator">=</span> metric<span class="operator">.</span>size(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>TextSingleLine<span class="operator">,</span> text); <span class="type"><a href="../qtgui/qimage.html">QImage</a></span> image(size<span class="operator">.</span>width() <span class="operator">+</span> <span class="number">12</span><span class="operator">,</span> size<span class="operator">.</span>height() <span class="operator">+</span> <span class="number">12</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qimage.html">QImage</a></span><span class="operator">::</span>Format_ARGB32_Premultiplied); image<span class="operator">.</span>fill(<a href="../qtgui/qcolor.html#qRgba">qRgba</a>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>)); <span class="type"><a href="../qtgui/qfont.html">QFont</a></span> font; font<span class="operator">.</span>setStyleStrategy(<span class="type"><a href="../qtgui/qfont.html">QFont</a></span><span class="operator">::</span>ForceOutline); <span class="type"><a href="../qtgui/qlineargradient.html">QLinearGradient</a></span> gradient(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> image<span class="operator">.</span>height()<span class="operator">-</span><span class="number">1</span>); gradient<span class="operator">.</span>setColorAt(<span class="number">0.0</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>white); gradient<span class="operator">.</span>setColorAt(<span class="number">0.2</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="number">200</span><span class="operator">,</span> <span class="number">200</span><span class="operator">,</span> <span class="number">255</span>)); gradient<span class="operator">.</span>setColorAt(<span class="number">0.8</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="number">200</span><span class="operator">,</span> <span class="number">200</span><span class="operator">,</span> <span class="number">255</span>)); gradient<span class="operator">.</span>setColorAt(<span class="number">1.0</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="number">127</span><span class="operator">,</span> <span class="number">127</span><span class="operator">,</span> <span class="number">200</span>)); <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> painter; painter<span class="operator">.</span>begin(<span class="operator">&</span>image); painter<span class="operator">.</span>setRenderHint(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing); painter<span class="operator">.</span>setBrush(gradient); painter<span class="operator">.</span>drawRoundedRect(<span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span>(<span class="number">0.5</span><span class="operator">,</span> <span class="number">0.5</span><span class="operator">,</span> image<span class="operator">.</span>width()<span class="operator">-</span><span class="number">1</span><span class="operator">,</span> image<span class="operator">.</span>height()<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> <span class="number">25</span><span class="operator">,</span> <span class="number">25</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>RelativeSize); painter<span class="operator">.</span>setFont(font); painter<span class="operator">.</span>setBrush(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>black); painter<span class="operator">.</span>drawText(<span class="type"><a href="../qtcore/qrect.html">QRect</a></span>(<span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span>(<span class="number">6</span><span class="operator">,</span> <span class="number">6</span>)<span class="operator">,</span> size)<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AlignCenter<span class="operator">,</span> text); painter<span class="operator">.</span>end(); setPixmap(<span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span><span class="operator">::</span>fromImage(image)); m_labelText <span class="operator">=</span> text; } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> DragLabel<span class="operator">::</span>labelText() <span class="keyword">const</span> { <span class="keyword">return</span> m_labelText; } </pre> </div> <!-- @@@draganddrop/fridgemagnets/draglabel.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>