demos/spectrum/app/settingsdialog.cpp

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  40
  41 #include "settingsdialog.h"
  42 #include <QComboBox>
  43 #include <QDialogButtonBox>
  44 #include <QLabel>
  45 #include <QPushButton>
  46 #include <QVBoxLayout>
  47 #include <QCheckBox>
  48 #include <QSlider>
  49 #include <QSpinBox>
  50
  51 SettingsDialog::SettingsDialog(
  52             const QList<QAudioDeviceInfo> &availableInputDevices,
  53             const QList<QAudioDeviceInfo> &availableOutputDevices,
  54             QWidget *parent)
  55     :   QDialog(parent)
  56     ,   m_windowFunction(DefaultWindowFunction)
  57     ,   m_inputDeviceComboBox(new QComboBox(this))
  58     ,   m_outputDeviceComboBox(new QComboBox(this))
  59     ,   m_windowFunctionComboBox(new QComboBox(this))
  60 {
  61     QVBoxLayout *dialogLayout = new QVBoxLayout(this);
  62
  63     // Populate combo boxes
  64
  65     QAudioDeviceInfo device;
  66     foreach (device, availableInputDevices)
  67         m_inputDeviceComboBox->addItem(device.deviceName(),
  68                                        QVariant::fromValue(device));
  69     foreach (device, availableOutputDevices)
  70         m_outputDeviceComboBox->addItem(device.deviceName(),
  71                                        QVariant::fromValue(device));
  72
  73     m_windowFunctionComboBox->addItem(tr("None"), QVariant::fromValue(int(NoWindow)));
  74     m_windowFunctionComboBox->addItem("Hann", QVariant::fromValue(int(HannWindow)));
  75     m_windowFunctionComboBox->setCurrentIndex(m_windowFunction);
  76
  77     // Initialize default devices
  78     if (!availableInputDevices.empty())
  79         m_inputDevice = availableInputDevices.front();
  80     if (!availableOutputDevices.empty())
  81         m_outputDevice = availableOutputDevices.front();
  82
  83     // Add widgets to layout
  84
  85     QScopedPointer<QHBoxLayout> inputDeviceLayout(new QHBoxLayout);
  86     QLabel *inputDeviceLabel = new QLabel(tr("Input device"), this);
  87     inputDeviceLayout->addWidget(inputDeviceLabel);
  88     inputDeviceLayout->addWidget(m_inputDeviceComboBox);
  89     dialogLayout->addLayout(inputDeviceLayout.data());
  90     inputDeviceLayout.take(); // ownership transferred to dialogLayout
  91
  92     QScopedPointer<QHBoxLayout> outputDeviceLayout(new QHBoxLayout);
  93     QLabel *outputDeviceLabel = new QLabel(tr("Output device"), this);
  94     outputDeviceLayout->addWidget(outputDeviceLabel);
  95     outputDeviceLayout->addWidget(m_outputDeviceComboBox);
  96     dialogLayout->addLayout(outputDeviceLayout.data());
  97     outputDeviceLayout.take(); // ownership transferred to dialogLayout
  98
  99     QScopedPointer<QHBoxLayout> windowFunctionLayout(new QHBoxLayout);
 100     QLabel *windowFunctionLabel = new QLabel(tr("Window function"), this);
 101     windowFunctionLayout->addWidget(windowFunctionLabel);
 102     windowFunctionLayout->addWidget(m_windowFunctionComboBox);
 103     dialogLayout->addLayout(windowFunctionLayout.data());
 104     windowFunctionLayout.take(); // ownership transferred to dialogLayout
 105
 106     // Connect
 107     CHECKED_CONNECT(m_inputDeviceComboBox, SIGNAL(activated(int)),
 108                     this, SLOT(inputDeviceChanged(int)));
 109     CHECKED_CONNECT(m_outputDeviceComboBox, SIGNAL(activated(int)),
 110                     this, SLOT(outputDeviceChanged(int)));
 111     CHECKED_CONNECT(m_windowFunctionComboBox, SIGNAL(activated(int)),
 112                     this, SLOT(windowFunctionChanged(int)));
 113
 114     // Add standard buttons to layout
 115     QDialogButtonBox *buttonBox = new QDialogButtonBox(this);
 116     buttonBox->setStandardButtons(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
 117     dialogLayout->addWidget(buttonBox);
 118
 119     // Connect standard buttons
 120     CHECKED_CONNECT(buttonBox->button(QDialogButtonBox::Ok), SIGNAL(clicked()),
 121                     this, SLOT(accept()));
 122     CHECKED_CONNECT(buttonBox->button(QDialogButtonBox::Cancel), SIGNAL(clicked()),
 123                     this, SLOT(reject()));
 124
 125     setLayout(dialogLayout);
 126 }
 127
 128 SettingsDialog::~SettingsDialog()
 129 {
 130
 131 }
 132
 133 void SettingsDialog::windowFunctionChanged(int index)
 134 {
 135     m_windowFunction = static_cast<WindowFunction>(
 136             m_windowFunctionComboBox->itemData(index).value<int>());
 137 }
 138
 139 void SettingsDialog::inputDeviceChanged(int index)
 140 {
 141     m_inputDevice = m_inputDeviceComboBox->itemData(index).value<QAudioDeviceInfo>();
 142 }
 143
 144 void SettingsDialog::outputDeviceChanged(int index)
 145 {
 146     m_outputDevice = m_outputDeviceComboBox->itemData(index).value<QAudioDeviceInfo>();
 147 }
 148