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qt4-x11/doc/html/phonon-capabilities-window-cpp.html
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2025-08-24 20:55:26 +08:00

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<h1 class="title">window.cpp Example File</h1>
<span class="small-subtitle">phonon/capabilities/window.cpp</span>
<!-- $$$phonon/capabilities/window.cpp-description -->
<div class="descr"> <a name="details"></a>
<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;window.h&quot;</span>
Window<span class="operator">::</span>Window()
{
setupUi();
updateWidgets();
connect(Phonon<span class="operator">::</span>BackendCapabilities<span class="operator">::</span>notifier()<span class="operator">,</span>
SIGNAL(capabilitiesChanged())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(updateWidgets()));
connect(Phonon<span class="operator">::</span>BackendCapabilities<span class="operator">::</span>notifier()<span class="operator">,</span>
SIGNAL(availableAudioOutputDevicesChanged())<span class="operator">,</span> SLOT(updateWidgets()));
}
<span class="type">void</span> Window<span class="operator">::</span>updateWidgets()
{
devicesListView<span class="operator">-</span><span class="operator">&gt;</span>setModel(<span class="keyword">new</span> <span class="type"><a href="qstandarditemmodel.html">QStandardItemModel</a></span>());
Phonon<span class="operator">::</span>ObjectDescriptionModel<span class="operator">&lt;</span>Phonon<span class="operator">::</span>AudioOutputDeviceType<span class="operator">&gt;</span> <span class="operator">*</span>model <span class="operator">=</span>
<span class="keyword">new</span> Phonon<span class="operator">::</span>ObjectDescriptionModel<span class="operator">&lt;</span>Phonon<span class="operator">::</span>AudioOutputDeviceType<span class="operator">&gt;</span>();
model<span class="operator">-</span><span class="operator">&gt;</span>setModelData(Phonon<span class="operator">::</span>BackendCapabilities<span class="operator">::</span>availableAudioOutputDevices());
devicesListView<span class="operator">-</span><span class="operator">&gt;</span>setModel(model);
mimeListWidget<span class="operator">-</span><span class="operator">&gt;</span>clear();
<span class="type"><a href="qstringlist.html">QStringList</a></span> mimeTypes <span class="operator">=</span>
Phonon<span class="operator">::</span>BackendCapabilities<span class="operator">::</span>availableMimeTypes();
foreach (<span class="type"><a href="qstring.html">QString</a></span> mimeType<span class="operator">,</span> mimeTypes) {
<span class="type"><a href="qlistwidgetitem.html">QListWidgetItem</a></span> <span class="operator">*</span>item <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlistwidgetitem.html">QListWidgetItem</a></span>(mimeListWidget);
item<span class="operator">-</span><span class="operator">&gt;</span>setText(mimeType);
}
effectsTreeWidget<span class="operator">-</span><span class="operator">&gt;</span>clear();
<span class="type"><a href="qlist.html">QList</a></span><span class="operator">&lt;</span>Phonon<span class="operator">::</span>EffectDescription<span class="operator">&gt;</span> effects <span class="operator">=</span>
Phonon<span class="operator">::</span>BackendCapabilities<span class="operator">::</span>availableAudioEffects();
foreach (Phonon<span class="operator">::</span>EffectDescription effect<span class="operator">,</span> effects) {
<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>item <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span>(effectsTreeWidget);
item<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">0</span><span class="operator">,</span> tr(<span class="string">&quot;Effect&quot;</span>));
item<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">1</span><span class="operator">,</span> effect<span class="operator">.</span>name());
item<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">2</span><span class="operator">,</span> effect<span class="operator">.</span>description());
Phonon<span class="operator">::</span>Effect <span class="operator">*</span>instance <span class="operator">=</span> <span class="keyword">new</span> Phonon<span class="operator">::</span>Effect(effect<span class="operator">,</span> <span class="keyword">this</span>);
<span class="type"><a href="qlist.html">QList</a></span><span class="operator">&lt;</span>Phonon<span class="operator">::</span>EffectParameter<span class="operator">&gt;</span> parameters <span class="operator">=</span> instance<span class="operator">-</span><span class="operator">&gt;</span>parameters();
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> parameters<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) {
Phonon<span class="operator">::</span>EffectParameter parameter <span class="operator">=</span> parameters<span class="operator">.</span>at(i);
<span class="type"><a href="qvariant.html">QVariant</a></span> defaultValue <span class="operator">=</span> parameter<span class="operator">.</span>defaultValue();
<span class="type"><a href="qvariant.html">QVariant</a></span> minimumValue <span class="operator">=</span> parameter<span class="operator">.</span>minimumValue();
<span class="type"><a href="qvariant.html">QVariant</a></span> maximumValue <span class="operator">=</span> parameter<span class="operator">.</span>maximumValue();
<span class="type"><a href="qstring.html">QString</a></span> valueString <span class="operator">=</span> <span class="type"><a href="qstring.html">QString</a></span>(<span class="string">&quot;%1 / %2 / %3&quot;</span>)
<span class="operator">.</span>arg(defaultValue<span class="operator">.</span>toString())<span class="operator">.</span>arg(minimumValue<span class="operator">.</span>toString())
<span class="operator">.</span>arg(maximumValue<span class="operator">.</span>toString());
<span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span> <span class="operator">*</span>parameterItem <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtreewidgetitem.html">QTreeWidgetItem</a></span>(item);
parameterItem<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">0</span><span class="operator">,</span> tr(<span class="string">&quot;Parameter&quot;</span>));
parameterItem<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">1</span><span class="operator">,</span> parameter<span class="operator">.</span>name());
parameterItem<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">2</span><span class="operator">,</span> parameter<span class="operator">.</span>description());
parameterItem<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">3</span><span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>typeToName(parameter<span class="operator">.</span>type()));
parameterItem<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="number">4</span><span class="operator">,</span> valueString);
}
}
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> effectsTreeWidget<span class="operator">-</span><span class="operator">&gt;</span>columnCount(); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="keyword">if</span> (i <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>)
effectsTreeWidget<span class="operator">-</span><span class="operator">&gt;</span>setColumnWidth(<span class="number">0</span><span class="operator">,</span> <span class="number">150</span>);
<span class="keyword">else</span> <span class="keyword">if</span> (i <span class="operator">=</span><span class="operator">=</span> <span class="number">2</span>)
effectsTreeWidget<span class="operator">-</span><span class="operator">&gt;</span>setColumnWidth(<span class="number">2</span><span class="operator">,</span> <span class="number">350</span>);
<span class="keyword">else</span>
effectsTreeWidget<span class="operator">-</span><span class="operator">&gt;</span>resizeColumnToContents(i);
}
}
<span class="type">void</span> Window<span class="operator">::</span>setupUi()
{
<span class="preprocessor">#if defined(Q_OS_SYMBIAN) || defined(Q_WS_MAEMO_5) || defined(Q_WS_SIMULATOR)</span>
devicesListView <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlistview.html">QListView</a></span>;
mimeListWidget <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlistwidget.html">QListWidget</a></span>;
<span class="type"><a href="qstringlist.html">QStringList</a></span> headerLabels;
headerLabels <span class="operator">&lt;</span><span class="operator">&lt;</span> tr(<span class="string">&quot;Type&quot;</span>) <span class="operator">&lt;</span><span class="operator">&lt;</span> tr(<span class="string">&quot;Name&quot;</span>) <span class="operator">&lt;</span><span class="operator">&lt;</span> tr(<span class="string">&quot;Description&quot;</span>) <span class="operator">&lt;</span><span class="operator">&lt;</span>
tr(<span class="string">&quot;Value Type&quot;</span>) <span class="operator">&lt;</span><span class="operator">&lt;</span> tr(<span class="string">&quot;Default/Min/Max Values&quot;</span>);
effectsTreeWidget <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtreewidget.html">QTreeWidget</a></span>;
effectsTreeWidget<span class="operator">-</span><span class="operator">&gt;</span>setHeaderLabels(headerLabels);
effectsTreeWidget<span class="operator">-</span><span class="operator">&gt;</span>setColumnCount(<span class="number">5</span>);
<span class="type"><a href="qtabwidget.html">QTabWidget</a></span> <span class="operator">*</span>tabWidget <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtabwidget.html">QTabWidget</a></span>;
<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widgetDevices <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>;
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>devicesLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>;
devicesLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(devicesListView);
widgetDevices<span class="operator">-</span><span class="operator">&gt;</span>setLayout(devicesLayout);
<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widgetMimes <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>;
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>mimesLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>;
mimesLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(mimeListWidget);
widgetMimes<span class="operator">-</span><span class="operator">&gt;</span>setLayout(mimesLayout);
<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widgetEffects <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>;
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>effectsLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>;
effectsLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(effectsTreeWidget);
widgetEffects<span class="operator">-</span><span class="operator">&gt;</span>setLayout(effectsLayout);
tabWidget<span class="operator">-</span><span class="operator">&gt;</span>addTab(widgetDevices<span class="operator">,</span> tr(<span class="string">&quot;Audio Devices&quot;</span>));
tabWidget<span class="operator">-</span><span class="operator">&gt;</span>addTab(widgetMimes<span class="operator">,</span> tr(<span class="string">&quot;MIME Types&quot;</span>));
tabWidget<span class="operator">-</span><span class="operator">&gt;</span>addTab(widgetEffects<span class="operator">,</span> tr(<span class="string">&quot;Audio Effects&quot;</span>));
<span class="type"><a href="qlayout.html">QLayout</a></span> <span class="operator">*</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(tabWidget);
<span class="preprocessor">#else</span>
devicesLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;Available Audio Devices:&quot;</span>));
devicesListView <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlistview.html">QListView</a></span>;
mimeTypesLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;Supported MIME Types:&quot;</span>));
mimeListWidget <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlistwidget.html">QListWidget</a></span>;
effectsLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">&quot;Available Audio Effects:&quot;</span>));
<span class="type"><a href="qstringlist.html">QStringList</a></span> headerLabels;
headerLabels <span class="operator">&lt;</span><span class="operator">&lt;</span> tr(<span class="string">&quot;Type&quot;</span>) <span class="operator">&lt;</span><span class="operator">&lt;</span> tr(<span class="string">&quot;Name&quot;</span>) <span class="operator">&lt;</span><span class="operator">&lt;</span> tr(<span class="string">&quot;Description&quot;</span>) <span class="operator">&lt;</span><span class="operator">&lt;</span>
tr(<span class="string">&quot;Value Type&quot;</span>) <span class="operator">&lt;</span><span class="operator">&lt;</span> tr(<span class="string">&quot;Default/Min/Max Values&quot;</span>);
effectsTreeWidget <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qtreewidget.html">QTreeWidget</a></span>;
effectsTreeWidget<span class="operator">-</span><span class="operator">&gt;</span>setHeaderLabels(headerLabels);
effectsTreeWidget<span class="operator">-</span><span class="operator">&gt;</span>setColumnCount(<span class="number">5</span>);
<span class="type"><a href="qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>;
layout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(devicesLabel<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>);
layout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(devicesListView<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span>);
layout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(mimeTypesLabel<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span>);
layout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(mimeListWidget<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>);
layout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(effectsLabel<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span>);
layout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(effectsTreeWidget<span class="operator">,</span> <span class="number">3</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">2</span>);
layout<span class="operator">-</span><span class="operator">&gt;</span>setRowStretch(<span class="number">3</span><span class="operator">,</span> <span class="number">100</span>);
backendBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(tr(<span class="string">&quot;Backend Capabilities&quot;</span>));
backendBox<span class="operator">-</span><span class="operator">&gt;</span>setLayout(layout);
<span class="type"><a href="qlayout.html">QLayout</a></span> <span class="operator">*</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(backendBox);
<span class="preprocessor">#endif</span>
setLayout(mainLayout);
setWindowTitle(tr(<span class="string">&quot;Backend Capabilities Example&quot;</span>));
}</pre>
</div>
<!-- @@@phonon/capabilities/window.cpp -->
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