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<h1 class="title">movieplayer.cpp Example File</h1>
<span class="small-subtitle">widgets/movie/movieplayer.cpp</span>
<!-- $$$widgets/movie/movieplayer.cpp-description -->
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<pre class="cpp"> <span class="comment">/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** &quot;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
** &quot;AS IS&quot; 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.&quot;
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include &lt;QtGui&gt;</span>
<span class="preprocessor">#include &quot;movieplayer.h&quot;</span>
MoviePlayer<span class="operator">::</span>MoviePlayer(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)
{
movie <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmovie.html">QMovie</a></span>(<span class="keyword">this</span>);
movie<span class="operator">-</span><span class="operator">&gt;</span>setCacheMode(<span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>CacheAll);
movieLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;No movie loaded&quot;</span>));
movieLabel<span class="operator">-</span><span class="operator">&gt;</span>setAlignment(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignCenter);
movieLabel<span class="operator">-</span><span class="operator">&gt;</span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Ignored<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Ignored);
movieLabel<span class="operator">-</span><span class="operator">&gt;</span>setBackgroundRole(<span class="type"><a href="qpalette.html">QPalette</a></span><span class="operator">::</span>Dark);
movieLabel<span class="operator">-</span><span class="operator">&gt;</span>setAutoFillBackground(<span class="keyword">true</span>);
currentMovieDirectory <span class="operator">=</span> <span class="string">&quot;movies&quot;</span>;
createControls();
createButtons();
connect(movie<span class="operator">,</span> SIGNAL(frameChanged(<span class="type">int</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(updateFrameSlider()));
connect(movie<span class="operator">,</span> SIGNAL(stateChanged(<span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>MovieState))<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> SLOT(updateButtons()));
connect(fitCheckBox<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(fitToWindow()));
connect(frameSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(goToFrame(<span class="type">int</span>)));
connect(speedSpinBox<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span>
movie<span class="operator">,</span> SLOT(setSpeed(<span class="type">int</span>)));
mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>;
mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(movieLabel);
mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addLayout(controlsLayout);
mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addLayout(buttonsLayout);
setLayout(mainLayout);
updateFrameSlider();
updateButtons();
setWindowTitle(tr(<span class="string">&quot;Movie Player&quot;</span>));
resize(<span class="number">400</span><span class="operator">,</span> <span class="number">400</span>);
}
<span class="type">void</span> MoviePlayer<span class="operator">::</span>open()
{
<span class="type"><a href="qstring.html">QString</a></span> fileName <span class="operator">=</span> <span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>getOpenFileName(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">&quot;Open a Movie&quot;</span>)<span class="operator">,</span>
currentMovieDirectory);
<span class="keyword">if</span> (<span class="operator">!</span>fileName<span class="operator">.</span>isEmpty())
openFile(fileName);
}
<span class="type">void</span> MoviePlayer<span class="operator">::</span>openFile(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>fileName)
{
currentMovieDirectory <span class="operator">=</span> <span class="type"><a href="qfileinfo.html">QFileInfo</a></span>(fileName)<span class="operator">.</span>path();
movie<span class="operator">-</span><span class="operator">&gt;</span>stop();
movieLabel<span class="operator">-</span><span class="operator">&gt;</span>setMovie(movie);
movie<span class="operator">-</span><span class="operator">&gt;</span>setFileName(fileName);
movie<span class="operator">-</span><span class="operator">&gt;</span>start();
updateFrameSlider();
updateButtons();
}
<span class="type">void</span> MoviePlayer<span class="operator">::</span>goToFrame(<span class="type">int</span> frame)
{
movie<span class="operator">-</span><span class="operator">&gt;</span>jumpToFrame(frame);
}
<span class="type">void</span> MoviePlayer<span class="operator">::</span>fitToWindow()
{
movieLabel<span class="operator">-</span><span class="operator">&gt;</span>setScaledContents(fitCheckBox<span class="operator">-</span><span class="operator">&gt;</span>isChecked());
}
<span class="type">void</span> MoviePlayer<span class="operator">::</span>updateFrameSlider()
{
<span class="type">bool</span> hasFrames <span class="operator">=</span> (movie<span class="operator">-</span><span class="operator">&gt;</span>currentFrameNumber() <span class="operator">&gt;</span><span class="operator">=</span> <span class="number">0</span>);
<span class="keyword">if</span> (hasFrames) {
<span class="keyword">if</span> (movie<span class="operator">-</span><span class="operator">&gt;</span>frameCount() <span class="operator">&gt;</span> <span class="number">0</span>) {
frameSlider<span class="operator">-</span><span class="operator">&gt;</span>setMaximum(movie<span class="operator">-</span><span class="operator">&gt;</span>frameCount() <span class="operator">-</span> <span class="number">1</span>);
} <span class="keyword">else</span> {
<span class="keyword">if</span> (movie<span class="operator">-</span><span class="operator">&gt;</span>currentFrameNumber() <span class="operator">&gt;</span> frameSlider<span class="operator">-</span><span class="operator">&gt;</span>maximum())
frameSlider<span class="operator">-</span><span class="operator">&gt;</span>setMaximum(movie<span class="operator">-</span><span class="operator">&gt;</span>currentFrameNumber());
}
frameSlider<span class="operator">-</span><span class="operator">&gt;</span>setValue(movie<span class="operator">-</span><span class="operator">&gt;</span>currentFrameNumber());
} <span class="keyword">else</span> {
frameSlider<span class="operator">-</span><span class="operator">&gt;</span>setMaximum(<span class="number">0</span>);
}
frameLabel<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(hasFrames);
frameSlider<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(hasFrames);
}
<span class="type">void</span> MoviePlayer<span class="operator">::</span>updateButtons()
{
playButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(movie<span class="operator">-</span><span class="operator">&gt;</span>isValid() <span class="operator">&amp;</span><span class="operator">&amp;</span> movie<span class="operator">-</span><span class="operator">&gt;</span>frameCount() <span class="operator">!</span><span class="operator">=</span> <span class="number">1</span>
<span class="operator">&amp;</span><span class="operator">&amp;</span> movie<span class="operator">-</span><span class="operator">&gt;</span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>NotRunning);
pauseButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(movie<span class="operator">-</span><span class="operator">&gt;</span>state() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>NotRunning);
pauseButton<span class="operator">-</span><span class="operator">&gt;</span>setChecked(movie<span class="operator">-</span><span class="operator">&gt;</span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>Paused);
stopButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(movie<span class="operator">-</span><span class="operator">&gt;</span>state() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qmovie.html">QMovie</a></span><span class="operator">::</span>NotRunning);
}
<span class="type">void</span> MoviePlayer<span class="operator">::</span>createControls()
{
fitCheckBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qcheckbox.html">QCheckBox</a></span>(tr(<span class="string">&quot;Fit to Window&quot;</span>));
frameLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;Current frame:&quot;</span>));
frameSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal);
frameSlider<span class="operator">-</span><span class="operator">&gt;</span>setTickPosition(<span class="type"><a href="qslider.html">QSlider</a></span><span class="operator">::</span>TicksBelow);
frameSlider<span class="operator">-</span><span class="operator">&gt;</span>setTickInterval(<span class="number">10</span>);
speedLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;Speed:&quot;</span>));
speedSpinBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qspinbox.html">QSpinBox</a></span>;
speedSpinBox<span class="operator">-</span><span class="operator">&gt;</span>setRange(<span class="number">1</span><span class="operator">,</span> <span class="number">9999</span>);
speedSpinBox<span class="operator">-</span><span class="operator">&gt;</span>setValue(<span class="number">100</span>);
speedSpinBox<span class="operator">-</span><span class="operator">&gt;</span>setSuffix(tr(<span class="string">&quot;%&quot;</span>));
controlsLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>;
controlsLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(fitCheckBox<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">1</span><span class="operator">,</span> <span class="number">2</span>);
controlsLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(frameLabel<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span>);
controlsLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(frameSlider<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">2</span>);
controlsLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(speedLabel<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span>);
controlsLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(speedSpinBox<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span>);
}
<span class="type">void</span> MoviePlayer<span class="operator">::</span>createButtons()
{
<span class="type"><a href="qsize.html">QSize</a></span> iconSize(<span class="number">36</span><span class="operator">,</span> <span class="number">36</span>);
openButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>;
openButton<span class="operator">-</span><span class="operator">&gt;</span>setIcon(style()<span class="operator">-</span><span class="operator">&gt;</span>standardIcon(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>SP_DialogOpenButton));
openButton<span class="operator">-</span><span class="operator">&gt;</span>setIconSize(iconSize);
openButton<span class="operator">-</span><span class="operator">&gt;</span>setToolTip(tr(<span class="string">&quot;Open File&quot;</span>));
connect(openButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(open()));
playButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>;
playButton<span class="operator">-</span><span class="operator">&gt;</span>setIcon(style()<span class="operator">-</span><span class="operator">&gt;</span>standardIcon(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>SP_MediaPlay));
playButton<span class="operator">-</span><span class="operator">&gt;</span>setIconSize(iconSize);
playButton<span class="operator">-</span><span class="operator">&gt;</span>setToolTip(tr(<span class="string">&quot;Play&quot;</span>));
connect(playButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> movie<span class="operator">,</span> SLOT(start()));
pauseButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>;
pauseButton<span class="operator">-</span><span class="operator">&gt;</span>setCheckable(<span class="keyword">true</span>);
pauseButton<span class="operator">-</span><span class="operator">&gt;</span>setIcon(style()<span class="operator">-</span><span class="operator">&gt;</span>standardIcon(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>SP_MediaPause));
pauseButton<span class="operator">-</span><span class="operator">&gt;</span>setIconSize(iconSize);
pauseButton<span class="operator">-</span><span class="operator">&gt;</span>setToolTip(tr(<span class="string">&quot;Pause&quot;</span>));
connect(pauseButton<span class="operator">,</span> SIGNAL(clicked(<span class="type">bool</span>))<span class="operator">,</span> movie<span class="operator">,</span> SLOT(setPaused(<span class="type">bool</span>)));
stopButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>;
stopButton<span class="operator">-</span><span class="operator">&gt;</span>setIcon(style()<span class="operator">-</span><span class="operator">&gt;</span>standardIcon(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>SP_MediaStop));
stopButton<span class="operator">-</span><span class="operator">&gt;</span>setIconSize(iconSize);
stopButton<span class="operator">-</span><span class="operator">&gt;</span>setToolTip(tr(<span class="string">&quot;Stop&quot;</span>));
connect(stopButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> movie<span class="operator">,</span> SLOT(stop()));
quitButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtoolbutton.html">QToolButton</a></span>;
quitButton<span class="operator">-</span><span class="operator">&gt;</span>setIcon(style()<span class="operator">-</span><span class="operator">&gt;</span>standardIcon(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>SP_DialogCloseButton));
quitButton<span class="operator">-</span><span class="operator">&gt;</span>setIconSize(iconSize);
quitButton<span class="operator">-</span><span class="operator">&gt;</span>setToolTip(tr(<span class="string">&quot;Quit&quot;</span>));
connect(quitButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(close()));
buttonsLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>;
buttonsLayout<span class="operator">-</span><span class="operator">&gt;</span>addStretch();
buttonsLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(openButton);
buttonsLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(playButton);
buttonsLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(pauseButton);
buttonsLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(stopButton);
buttonsLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(quitButton);
buttonsLayout<span class="operator">-</span><span class="operator">&gt;</span>addStretch();
}</pre>
</div>
<!-- @@@widgets/movie/movieplayer.cpp -->
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