<?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>fademessage.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-effects-fademessage-example.html">Fade Message Effect Example</a></td><td >fademessage.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">fademessage.cpp Example File</h1> <span class="subtitle">effects/fademessage/fademessage.cpp</span> <!-- $$$effects/fademessage/fademessage.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 "fademessage.h"</span> <span class="preprocessor">#include <QtWidgets></span> FadeMessage<span class="operator">::</span>FadeMessage(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent): <span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span>(parent) { setScene(<span class="operator">&</span>m_scene); setHorizontalScrollBarPolicy(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAlwaysOff); setVerticalScrollBarPolicy(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAlwaysOff); setupScene(); m_animation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qpropertyanimation.html">QPropertyAnimation</a></span>(m_effect<span class="operator">,</span> <span class="string">"strength"</span><span class="operator">,</span> <span class="keyword">this</span>); m_animation<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">500</span>); m_animation<span class="operator">-</span><span class="operator">></span>setEasingCurve(<span class="type"><a href="../qtcore/qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>InOutSine); m_animation<span class="operator">-</span><span class="operator">></span>setStartValue(<span class="number">0</span>); m_animation<span class="operator">-</span><span class="operator">></span>setEndValue(<span class="number">1</span>); setRenderHint(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing<span class="operator">,</span> <span class="keyword">true</span>); setFrameStyle(<span class="type"><a href="qframe.html">QFrame</a></span><span class="operator">::</span>NoFrame); } <span class="type">void</span> FadeMessage<span class="operator">::</span>togglePopup() { <span class="keyword">if</span> (m_message<span class="operator">-</span><span class="operator">></span>isVisible()) { m_message<span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">false</span>); m_animation<span class="operator">-</span><span class="operator">></span>setDirection(<span class="type"><a href="../qtcore/qabstractanimation.html">QAbstractAnimation</a></span><span class="operator">::</span>Backward); } <span class="keyword">else</span> { m_message<span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">true</span>); m_animation<span class="operator">-</span><span class="operator">></span>setDirection(<span class="type"><a href="../qtcore/qabstractanimation.html">QAbstractAnimation</a></span><span class="operator">::</span>Forward); } m_animation<span class="operator">-</span><span class="operator">></span>start(); } <span class="type">void</span> FadeMessage<span class="operator">::</span>setupScene() { <span class="type"><a href="qgraphicsrectitem.html">QGraphicsRectItem</a></span> <span class="operator">*</span>parent <span class="operator">=</span> m_scene<span class="operator">.</span>addRect(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">800</span><span class="operator">,</span> <span class="number">600</span>); parent<span class="operator">-</span><span class="operator">></span>setPen(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>NoPen); parent<span class="operator">-</span><span class="operator">></span>setZValue(<span class="number">0</span>); <span class="type"><a href="qgraphicspixmapitem.html">QGraphicsPixmapItem</a></span> <span class="operator">*</span>bg <span class="operator">=</span> m_scene<span class="operator">.</span>addPixmap(<span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span>(<span class="string">":/background.jpg"</span>)); bg<span class="operator">-</span><span class="operator">></span>setParentItem(parent); bg<span class="operator">-</span><span class="operator">></span>setZValue(<span class="operator">-</span><span class="number">1</span>); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">1</span>; i <span class="operator"><</span> <span class="number">5</span>; <span class="operator">+</span><span class="operator">+</span>i) <span class="keyword">for</span> (<span class="type">int</span> j <span class="operator">=</span> <span class="number">2</span>; j <span class="operator"><</span> <span class="number">5</span>; <span class="operator">+</span><span class="operator">+</span>j) { <span class="type"><a href="qgraphicsrectitem.html">QGraphicsRectItem</a></span> <span class="operator">*</span>item <span class="operator">=</span> m_scene<span class="operator">.</span>addRect(i <span class="operator">*</span> <span class="number">50</span><span class="operator">,</span> (j <span class="operator">-</span> <span class="number">1</span>) <span class="operator">*</span> <span class="number">50</span><span class="operator">,</span> <span class="number">38</span><span class="operator">,</span> <span class="number">38</span>); item<span class="operator">-</span><span class="operator">></span>setParentItem(parent); item<span class="operator">-</span><span class="operator">></span>setZValue(<span class="number">1</span>); <span class="type">int</span> hue <span class="operator">=</span> <span class="number">12</span> <span class="operator">*</span> (i <span class="operator">*</span> <span class="number">5</span> <span class="operator">+</span> j); item<span class="operator">-</span><span class="operator">></span>setBrush(<span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromHsv(hue<span class="operator">,</span> <span class="number">128</span><span class="operator">,</span> <span class="number">128</span>)); } <span class="type"><a href="../qtgui/qfont.html">QFont</a></span> font; font<span class="operator">.</span>setPointSize(font<span class="operator">.</span>pointSize() <span class="operator">*</span> <span class="number">2</span>); font<span class="operator">.</span>setBold(<span class="keyword">true</span>); <span class="type"><a href="../qtgui/qfontmetrics.html">QFontMetrics</a></span> fontMetrics(font); <span class="type">int</span> fh <span class="operator">=</span> fontMetrics<span class="operator">.</span>height(); <span class="type"><a href="../qtcore/qstring.html">QString</a></span> sceneText <span class="operator">=</span> <span class="string">"Qt Everywhere!"</span>; <span class="type">int</span> sceneTextWidth <span class="operator">=</span> fontMetrics<span class="operator">.</span>horizontalAdvance(sceneText); <span class="type"><a href="qgraphicsrectitem.html">QGraphicsRectItem</a></span> <span class="operator">*</span>block <span class="operator">=</span> m_scene<span class="operator">.</span>addRect(<span class="number">50</span><span class="operator">,</span> <span class="number">300</span><span class="operator">,</span> sceneTextWidth<span class="operator">,</span> fh <span class="operator">+</span> <span class="number">3</span>); block<span class="operator">-</span><span class="operator">></span>setPen(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>NoPen); block<span class="operator">-</span><span class="operator">></span>setBrush(<span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="number">102</span><span class="operator">,</span> <span class="number">153</span><span class="operator">,</span> <span class="number">51</span>)); <span class="type"><a href="qgraphicstextitem.html">QGraphicsTextItem</a></span> <span class="operator">*</span>text <span class="operator">=</span> m_scene<span class="operator">.</span>addText(sceneText<span class="operator">,</span> font); text<span class="operator">-</span><span class="operator">></span>setDefaultTextColor(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>white); text<span class="operator">-</span><span class="operator">></span>setPos(<span class="number">50</span><span class="operator">,</span> <span class="number">300</span>); block<span class="operator">-</span><span class="operator">></span>setZValue(<span class="number">2</span>); block<span class="operator">-</span><span class="operator">></span>hide(); text<span class="operator">-</span><span class="operator">></span>setParentItem(block); m_message <span class="operator">=</span> block; m_effect <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicscolorizeeffect.html">QGraphicsColorizeEffect</a></span>; m_effect<span class="operator">-</span><span class="operator">></span>setColor(<span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="number">122</span><span class="operator">,</span> <span class="number">193</span><span class="operator">,</span> <span class="number">66</span>)); m_effect<span class="operator">-</span><span class="operator">></span>setStrength(<span class="number">0</span>); m_effect<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>); parent<span class="operator">-</span><span class="operator">></span>setGraphicsEffect(m_effect); <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>press <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>; press<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Press me"</span>)); connect(press<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> SLOT(togglePopup())); m_scene<span class="operator">.</span>addWidget(press); press<span class="operator">-</span><span class="operator">></span>move(<span class="number">300</span><span class="operator">,</span> <span class="number">500</span>); } </pre> </div> <!-- @@@effects/fademessage/fademessage.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>