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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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     7 ** This file is part of the examples of the Qt Toolkit.

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     9 ** $QT_BEGIN_LICENSE:LGPL$

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    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 

    44 #include "window.h"

    45 

    46 //! [constructor]

    47 Window::Window()

    48 {

    49     setupUi();

    50     updateWidgets();

    51 

    52     connect(Phonon::BackendCapabilities::notifier(),

    53             SIGNAL(capabilitiesChanged()), this, SLOT(updateWidgets()));

    54     connect(Phonon::BackendCapabilities::notifier(),

    55             SIGNAL(availableAudioOutputDevicesChanged()), SLOT(updateWidgets()));

    56 }

    57 //! [constructor]

    58 

    59 //! [outputDevices]

    60 void Window::updateWidgets()

    61 {

    62     devicesListView->setModel(new QStandardItemModel());

    63     Phonon::ObjectDescriptionModel<Phonon::AudioOutputDeviceType> *model =

    64             new Phonon::ObjectDescriptionModel<Phonon::AudioOutputDeviceType>();

    65     model->setModelData(Phonon::BackendCapabilities::availableAudioOutputDevices());

    66     devicesListView->setModel(model);

    67 //! [outputDevices]

    68 

    69 //! [mimeTypes]

    70     mimeListWidget->clear();

    71     QStringList mimeTypes =

    72             Phonon::BackendCapabilities::availableMimeTypes();

    73     foreach (QString mimeType, mimeTypes) {

    74         QListWidgetItem *item = new QListWidgetItem(mimeListWidget);

    75         item->setText(mimeType);

    76     }

    77 //! [mimeTypes]

    78 

    79 //! [effects]

    80     effectsTreeWidget->clear();

    81     QList<Phonon::EffectDescription> effects =

    82         Phonon::BackendCapabilities::availableAudioEffects();

    83     foreach (Phonon::EffectDescription effect, effects) {

    84         QTreeWidgetItem *item = new QTreeWidgetItem(effectsTreeWidget);

    85         item->setText(0, tr("Effect"));

    86         item->setText(1, effect.name());

    87         item->setText(2, effect.description());

    88 //! [effects]

    89 

    90 //! [effectsParameters]

    91         Phonon::Effect *instance = new Phonon::Effect(effect, this);

    92         QList<Phonon::EffectParameter> parameters = instance->parameters();

    93         for (int i = 0; i < parameters.size(); ++i) {

    94                 Phonon::EffectParameter parameter = parameters.at(i);

    95 

    96             QVariant defaultValue = parameter.defaultValue();

    97             QVariant minimumValue = parameter.minimumValue();

    98             QVariant maximumValue = parameter.maximumValue();

    99 

   100             QString valueString = QString("%1 / %2 / %3")

   101                     .arg(defaultValue.toString()).arg(minimumValue.toString())

   102                     .arg(maximumValue.toString()); 

   103 

   104             QTreeWidgetItem *parameterItem = new QTreeWidgetItem(item);

   105             parameterItem->setText(0, tr("Parameter"));

   106             parameterItem->setText(1, parameter.name());

   107             parameterItem->setText(2, parameter.description());

   108             parameterItem->setText(3, QVariant::typeToName(parameter.type()));

   109             parameterItem->setText(4, valueString);

   110         }

   111     }

   112 //! [effectsParameters]

   113     for (int i = 0; i < effectsTreeWidget->columnCount(); ++i) {

   114         if (i == 0)

   115             effectsTreeWidget->setColumnWidth(0, 150);

   116         else if (i == 2)

   117             effectsTreeWidget->setColumnWidth(2, 350);

   118         else

   119             effectsTreeWidget->resizeColumnToContents(i);

   120     }

   121 }

   122 

   123 void Window::setupUi()

   124 {

   125     setupBackendBox();

   126 

   127     QLayout *layout = new QVBoxLayout;

   128     layout->addWidget(backendBox);

   129 

   130     setLayout(layout);

   131     setWindowTitle(tr("Backend Capabilities Example"));

   132 }

   133 

   134 void Window::setupBackendBox()

   135 {

   136     backendBox = new QGroupBox(tr("Backend Capabilities"));

   137 

   138     devicesLabel = new QLabel(tr("Available Audio Devices:"));

   139     devicesListView = new QListView;

   140 

   141     mimeTypesLabel = new QLabel(tr("Supported MIME Types:"));

   142     mimeListWidget = new QListWidget;

   143 

   144     effectsLabel = new QLabel(tr("Available Audio Effects:"));

   145 

   146     QStringList headerLabels;

   147     headerLabels << tr("Type") << tr("Name") << tr("Description") <<

   148                     tr("Value Type") << tr("Default/Min/Max Values");

   149 

   150     effectsTreeWidget = new QTreeWidget;

   151     effectsTreeWidget->setHeaderLabels(headerLabels);

   152     effectsTreeWidget->setColumnCount(5);

   153 

   154     QGridLayout *layout = new QGridLayout;

   155     layout->addWidget(devicesLabel, 0, 0);

   156     layout->addWidget(devicesListView, 1, 0);

   157     layout->addWidget(mimeTypesLabel, 0, 1);

   158     layout->addWidget(mimeListWidget, 1, 1);

   159     layout->addWidget(effectsLabel, 2, 0);

   160     layout->addWidget(effectsTreeWidget, 3, 0, 2, 2);

   161     layout->setRowStretch(3, 100);

   162 

   163     backendBox = new QGroupBox(tr("Backend Capabilities"));

   164     backendBox->setLayout(layout);

   165 }

   166