<?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>videoplayer.cpp Example File | Qt Multimedia 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="qtmultimedia-index.html">Qt Multimedia</a></td><td ><a href="qtmultimedia-multimediawidgets-videowidget-example.html">Video Widget Example</a></td><td >videoplayer.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtmultimedia-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">videoplayer.cpp Example File</h1> <span class="subtitle">multimediawidgets/videowidget/videoplayer.cpp</span> <!-- $$$multimediawidgets/videowidget/videoplayer.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2017 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 "videoplayer.h"</span> <span class="preprocessor">#include <QtWidgets></span> <span class="preprocessor">#include <QVideoWidget></span> VideoPlayer<span class="operator">::</span>VideoPlayer(<span class="type">QWidget</span> <span class="operator">*</span>parent) : <span class="type">QWidget</span>(parent) { m_mediaPlayer <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span>(<span class="keyword">this</span><span class="operator">,</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>VideoSurface); <span class="type"><a href="qvideowidget.html">QVideoWidget</a></span> <span class="operator">*</span>videoWidget <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvideowidget.html">QVideoWidget</a></span>; <span class="type">QAbstractButton</span> <span class="operator">*</span>openButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QPushButton</span>(tr(<span class="string">"Open..."</span>)); connect(openButton<span class="operator">,</span> <span class="operator">&</span><span class="type">QAbstractButton</span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>VideoPlayer<span class="operator">::</span>openFile); m_playButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QPushButton</span>; m_playButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); m_playButton<span class="operator">-</span><span class="operator">></span>setIcon(style()<span class="operator">-</span><span class="operator">></span>standardIcon(<span class="type">QStyle</span><span class="operator">::</span>SP_MediaPlay)); connect(m_playButton<span class="operator">,</span> <span class="operator">&</span><span class="type">QAbstractButton</span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>VideoPlayer<span class="operator">::</span>play); m_positionSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QSlider</span>(<span class="type">Qt</span><span class="operator">::</span>Horizontal); m_positionSlider<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>); connect(m_positionSlider<span class="operator">,</span> <span class="operator">&</span><span class="type">QAbstractSlider</span><span class="operator">::</span>sliderMoved<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>VideoPlayer<span class="operator">::</span>setPosition); m_errorLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QLabel</span>; m_errorLabel<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type">QSizePolicy</span><span class="operator">::</span>Preferred<span class="operator">,</span> <span class="type">QSizePolicy</span><span class="operator">::</span>Maximum); <span class="type">QBoxLayout</span> <span class="operator">*</span>controlLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QHBoxLayout</span>; controlLayout<span class="operator">-</span><span class="operator">></span>setMargin(<span class="number">0</span>); controlLayout<span class="operator">-</span><span class="operator">></span>addWidget(openButton); controlLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_playButton); controlLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_positionSlider); <span class="type">QBoxLayout</span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QVBoxLayout</span>; layout<span class="operator">-</span><span class="operator">></span>addWidget(videoWidget); layout<span class="operator">-</span><span class="operator">></span>addLayout(controlLayout); layout<span class="operator">-</span><span class="operator">></span>addWidget(m_errorLabel); setLayout(layout); m_mediaPlayer<span class="operator">-</span><span class="operator">></span>setVideoOutput(videoWidget); connect(m_mediaPlayer<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>stateChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>VideoPlayer<span class="operator">::</span>mediaStateChanged); connect(m_mediaPlayer<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>positionChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>VideoPlayer<span class="operator">::</span>positionChanged); connect(m_mediaPlayer<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>durationChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>VideoPlayer<span class="operator">::</span>durationChanged); connect(m_mediaPlayer<span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span><span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>Error<span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span><span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>error)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>VideoPlayer<span class="operator">::</span>handleError); } VideoPlayer<span class="operator">::</span><span class="operator">~</span>VideoPlayer() { } <span class="type">void</span> VideoPlayer<span class="operator">::</span>openFile() { <span class="type">QFileDialog</span> fileDialog(<span class="keyword">this</span>); fileDialog<span class="operator">.</span>setAcceptMode(<span class="type">QFileDialog</span><span class="operator">::</span>AcceptOpen); fileDialog<span class="operator">.</span>setWindowTitle(tr(<span class="string">"Open Movie"</span>)); <span class="type">QStringList</span> supportedMimeTypes <span class="operator">=</span> m_mediaPlayer<span class="operator">-</span><span class="operator">></span>supportedMimeTypes(); <span class="keyword">if</span> (<span class="operator">!</span>supportedMimeTypes<span class="operator">.</span>isEmpty()) fileDialog<span class="operator">.</span>setMimeTypeFilters(supportedMimeTypes); fileDialog<span class="operator">.</span>setDirectory(<span class="type">QStandardPaths</span><span class="operator">::</span>standardLocations(<span class="type">QStandardPaths</span><span class="operator">::</span>MoviesLocation)<span class="operator">.</span>value(<span class="number">0</span><span class="operator">,</span> <span class="type">QDir</span><span class="operator">::</span>homePath())); <span class="keyword">if</span> (fileDialog<span class="operator">.</span>exec() <span class="operator">=</span><span class="operator">=</span> <span class="type">QDialog</span><span class="operator">::</span>Accepted) setUrl(fileDialog<span class="operator">.</span>selectedUrls()<span class="operator">.</span>constFirst()); } <span class="type">void</span> VideoPlayer<span class="operator">::</span>setUrl(<span class="keyword">const</span> <span class="type">QUrl</span> <span class="operator">&</span>url) { m_errorLabel<span class="operator">-</span><span class="operator">></span>setText(<span class="type">QString</span>()); setWindowFilePath(url<span class="operator">.</span>isLocalFile() <span class="operator">?</span> url<span class="operator">.</span>toLocalFile() : <span class="type">QString</span>()); m_mediaPlayer<span class="operator">-</span><span class="operator">></span>setMedia(url); m_playButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>); } <span class="type">void</span> VideoPlayer<span class="operator">::</span>play() { <span class="keyword">switch</span> (m_mediaPlayer<span class="operator">-</span><span class="operator">></span>state()) { <span class="keyword">case</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>PlayingState: m_mediaPlayer<span class="operator">-</span><span class="operator">></span>pause(); <span class="keyword">break</span>; <span class="keyword">default</span>: m_mediaPlayer<span class="operator">-</span><span class="operator">></span>play(); <span class="keyword">break</span>; } } <span class="type">void</span> VideoPlayer<span class="operator">::</span>mediaStateChanged(<span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>State state) { <span class="keyword">switch</span>(state) { <span class="keyword">case</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>PlayingState: m_playButton<span class="operator">-</span><span class="operator">></span>setIcon(style()<span class="operator">-</span><span class="operator">></span>standardIcon(<span class="type">QStyle</span><span class="operator">::</span>SP_MediaPause)); <span class="keyword">break</span>; <span class="keyword">default</span>: m_playButton<span class="operator">-</span><span class="operator">></span>setIcon(style()<span class="operator">-</span><span class="operator">></span>standardIcon(<span class="type">QStyle</span><span class="operator">::</span>SP_MediaPlay)); <span class="keyword">break</span>; } } <span class="type">void</span> VideoPlayer<span class="operator">::</span>positionChanged(<span class="type">qint64</span> position) { m_positionSlider<span class="operator">-</span><span class="operator">></span>setValue(position); } <span class="type">void</span> VideoPlayer<span class="operator">::</span>durationChanged(<span class="type">qint64</span> duration) { m_positionSlider<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0</span><span class="operator">,</span> duration); } <span class="type">void</span> VideoPlayer<span class="operator">::</span>setPosition(<span class="type">int</span> position) { m_mediaPlayer<span class="operator">-</span><span class="operator">></span>setPosition(position); } <span class="type">void</span> VideoPlayer<span class="operator">::</span>handleError() { m_playButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); <span class="keyword">const</span> <span class="type">QString</span> errorString <span class="operator">=</span> m_mediaPlayer<span class="operator">-</span><span class="operator">></span>errorString(); <span class="type">QString</span> message <span class="operator">=</span> <span class="string">"Error: "</span>; <span class="keyword">if</span> (errorString<span class="operator">.</span>isEmpty()) message <span class="operator">+</span><span class="operator">=</span> <span class="string">" #"</span> <span class="operator">+</span> <span class="type">QString</span><span class="operator">::</span>number(<span class="type">int</span>(m_mediaPlayer<span class="operator">-</span><span class="operator">></span>error())); <span class="keyword">else</span> message <span class="operator">+</span><span class="operator">=</span> errorString; m_errorLabel<span class="operator">-</span><span class="operator">></span>setText(message); } </pre> </div> <!-- @@@multimediawidgets/videowidget/videoplayer.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>