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<h1 class="title">videoplayer.cpp Example File</h1>
<span class="subtitle">multimediawidgets/videographicsitem/videoplayer.cpp</span>
<!-- $$$multimediawidgets/videographicsitem/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
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** 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
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** * Redistributions of source code must retain the above copyright
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<span class="preprocessor">#include "videoplayer.h"</span>
<span class="preprocessor">#include <QtWidgets></span>
<span class="preprocessor">#include <QVideoSurfaceFormat></span>
<span class="preprocessor">#include <QGraphicsVideoItem></span>
VideoPlayer<span class="operator">::</span>VideoPlayer(<span class="type">QWidget</span> <span class="operator">*</span>parent)
: <span class="type">QWidget</span>(parent)
<span class="operator">,</span> mediaPlayer(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qmediaplayer.html">QMediaPlayer</a></span><span class="operator">::</span>VideoSurface)
<span class="operator">,</span> videoItem(<span class="number">0</span>)
<span class="operator">,</span> playButton(<span class="number">0</span>)
<span class="operator">,</span> positionSlider(<span class="number">0</span>)
{
<span class="keyword">const</span> <span class="type">QRect</span> screenGeometry <span class="operator">=</span> <span class="type">QApplication</span><span class="operator">::</span>desktop()<span class="operator">-</span><span class="operator">></span>screenGeometry(<span class="keyword">this</span>);
videoItem <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicsvideoitem.html">QGraphicsVideoItem</a></span>;
videoItem<span class="operator">-</span><span class="operator">></span>setSize(<span class="type">QSizeF</span>(screenGeometry<span class="operator">.</span>width() <span class="operator">/</span> <span class="number">3</span><span class="operator">,</span> screenGeometry<span class="operator">.</span>height() <span class="operator">/</span> <span class="number">2</span>));
<span class="type">QGraphicsScene</span> <span class="operator">*</span>scene <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QGraphicsScene</span>(<span class="keyword">this</span>);
<span class="type">QGraphicsView</span> <span class="operator">*</span>graphicsView <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QGraphicsView</span>(scene);
scene<span class="operator">-</span><span class="operator">></span>addItem(videoItem);
<span class="type">QSlider</span> <span class="operator">*</span>rotateSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QSlider</span>(<span class="type">Qt</span><span class="operator">::</span>Horizontal);
rotateSlider<span class="operator">-</span><span class="operator">></span>setToolTip(tr(<span class="string">"Rotate Video"</span>));
rotateSlider<span class="operator">-</span><span class="operator">></span>setRange(<span class="operator">-</span><span class="number">180</span><span class="operator">,</span> <span class="number">180</span>);
rotateSlider<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">0</span>);
connect(rotateSlider<span class="operator">,</span> <span class="operator">&</span><span class="type">QAbstractSlider</span><span class="operator">::</span>valueChanged<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>VideoPlayer<span class="operator">::</span>rotateVideo);
<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);
playButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QPushButton</span>;
playButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>);
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(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);
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);
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(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);
<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(playButton);
controlLayout<span class="operator">-</span><span class="operator">></span>addWidget(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>(<span class="keyword">this</span>);
layout<span class="operator">-</span><span class="operator">></span>addWidget(graphicsView);
layout<span class="operator">-</span><span class="operator">></span>addWidget(rotateSlider);
layout<span class="operator">-</span><span class="operator">></span>addLayout(controlLayout);
mediaPlayer<span class="operator">.</span>setVideoOutput(videoItem);
connect(<span class="operator">&</span>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(<span class="operator">&</span>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(<span class="operator">&</span>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);
}
VideoPlayer<span class="operator">::</span><span class="operator">~</span>VideoPlayer()
{
}
<span class="type">QSize</span> VideoPlayer<span class="operator">::</span>sizeHint() <span class="keyword">const</span>
{
<span class="keyword">return</span> (videoItem<span class="operator">-</span><span class="operator">></span>size() <span class="operator">*</span> <span class="type">qreal</span>(<span class="number">3</span>) <span class="operator">/</span> <span class="type">qreal</span>(<span class="number">2</span>))<span class="operator">.</span>toSize();
}
bool VideoPlayer<span class="operator">::</span>isPlayerAvailable() <span class="keyword">const</span>
{
<span class="keyword">return</span> mediaPlayer<span class="operator">.</span>isAvailable();
}
<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="keyword">const</span> <span class="type">QStringList</span> supportedMimeTypes <span class="operator">=</span> mediaPlayer<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)
load(fileDialog<span class="operator">.</span>selectedUrls()<span class="operator">.</span>constFirst());
}
<span class="type">void</span> VideoPlayer<span class="operator">::</span>load(<span class="keyword">const</span> <span class="type">QUrl</span> <span class="operator">&</span>url)
{
mediaPlayer<span class="operator">.</span>setMedia(url);
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>(mediaPlayer<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:
mediaPlayer<span class="operator">.</span>pause();
<span class="keyword">break</span>;
<span class="keyword">default</span>:
mediaPlayer<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:
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>:
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)
{
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)
{
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)
{
mediaPlayer<span class="operator">.</span>setPosition(position);
}
<span class="type">void</span> VideoPlayer<span class="operator">::</span>rotateVideo(<span class="type">int</span> angle)
{
<span class="comment">//rotate around the center of video element</span>
<span class="type">qreal</span> x <span class="operator">=</span> videoItem<span class="operator">-</span><span class="operator">></span>boundingRect()<span class="operator">.</span>width() <span class="operator">/</span> <span class="number">2.0</span>;
<span class="type">qreal</span> y <span class="operator">=</span> videoItem<span class="operator">-</span><span class="operator">></span>boundingRect()<span class="operator">.</span>height() <span class="operator">/</span> <span class="number">2.0</span>;
videoItem<span class="operator">-</span><span class="operator">></span>setTransform(<span class="type">QTransform</span>()<span class="operator">.</span>translate(x<span class="operator">,</span> y)<span class="operator">.</span>rotate(angle)<span class="operator">.</span>translate(<span class="operator">-</span>x<span class="operator">,</span> <span class="operator">-</span>y));
}
</pre>
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<!-- @@@multimediawidgets/videographicsitem/videoplayer.cpp -->
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