settingsdialog.cpp Example File

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  #include "settingsdialog.h"
  #include <QCheckBox>
  #include <QComboBox>
  #include <QDialogButtonBox>
  #include <QLabel>
  #include <QPushButton>
  #include <QSlider>
  #include <QSpinBox>
  #include <QVBoxLayout>

  SettingsDialog::SettingsDialog(
              const QList<QAudioDeviceInfo> &availableInputDevices,
              const QList<QAudioDeviceInfo> &availableOutputDevices,
              QWidget *parent)
      :   QDialog(parent)
      ,   m_windowFunction(DefaultWindowFunction)
      ,   m_inputDeviceComboBox(new QComboBox(this))
      ,   m_outputDeviceComboBox(new QComboBox(this))
      ,   m_windowFunctionComboBox(new QComboBox(this))
  {
      QVBoxLayout *dialogLayout = new QVBoxLayout(this);

      // Populate combo boxes

      QAudioDeviceInfo device;
      foreach (device, availableInputDevices)
          m_inputDeviceComboBox->addItem(device.deviceName(),
                                         QVariant::fromValue(device));
      foreach (device, availableOutputDevices)
          m_outputDeviceComboBox->addItem(device.deviceName(),
                                         QVariant::fromValue(device));

      m_windowFunctionComboBox->addItem(tr("None"), QVariant::fromValue(int(NoWindow)));
      m_windowFunctionComboBox->addItem("Hann", QVariant::fromValue(int(HannWindow)));
      m_windowFunctionComboBox->setCurrentIndex(m_windowFunction);

      // Initialize default devices
      if (!availableInputDevices.empty())
          m_inputDevice = availableInputDevices.front();
      if (!availableOutputDevices.empty())
          m_outputDevice = availableOutputDevices.front();

      // Add widgets to layout

      QScopedPointer<QHBoxLayout> inputDeviceLayout(new QHBoxLayout);
      QLabel *inputDeviceLabel = new QLabel(tr("Input device"), this);
      inputDeviceLayout->addWidget(inputDeviceLabel);
      inputDeviceLayout->addWidget(m_inputDeviceComboBox);
      dialogLayout->addLayout(inputDeviceLayout.data());
      inputDeviceLayout.take(); // ownership transferred to dialogLayout

      QScopedPointer<QHBoxLayout> outputDeviceLayout(new QHBoxLayout);
      QLabel *outputDeviceLabel = new QLabel(tr("Output device"), this);
      outputDeviceLayout->addWidget(outputDeviceLabel);
      outputDeviceLayout->addWidget(m_outputDeviceComboBox);
      dialogLayout->addLayout(outputDeviceLayout.data());
      outputDeviceLayout.take(); // ownership transferred to dialogLayout

      QScopedPointer<QHBoxLayout> windowFunctionLayout(new QHBoxLayout);
      QLabel *windowFunctionLabel = new QLabel(tr("Window function"), this);
      windowFunctionLayout->addWidget(windowFunctionLabel);
      windowFunctionLayout->addWidget(m_windowFunctionComboBox);
      dialogLayout->addLayout(windowFunctionLayout.data());
      windowFunctionLayout.take(); // ownership transferred to dialogLayout

      // Connect
      CHECKED_CONNECT(m_inputDeviceComboBox, SIGNAL(activated(int)),
                      this, SLOT(inputDeviceChanged(int)));
      CHECKED_CONNECT(m_outputDeviceComboBox, SIGNAL(activated(int)),
                      this, SLOT(outputDeviceChanged(int)));
      CHECKED_CONNECT(m_windowFunctionComboBox, SIGNAL(activated(int)),
                      this, SLOT(windowFunctionChanged(int)));

      // Add standard buttons to layout
      QDialogButtonBox *buttonBox = new QDialogButtonBox(this);
      buttonBox->setStandardButtons(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
      dialogLayout->addWidget(buttonBox);

      // Connect standard buttons
      CHECKED_CONNECT(buttonBox->button(QDialogButtonBox::Ok), SIGNAL(clicked()),
                      this, SLOT(accept()));
      CHECKED_CONNECT(buttonBox->button(QDialogButtonBox::Cancel), SIGNAL(clicked()),
                      this, SLOT(reject()));

      setLayout(dialogLayout);
  }

  SettingsDialog::~SettingsDialog()
  {

  }

  void SettingsDialog::windowFunctionChanged(int index)
  {
      m_windowFunction = static_cast<WindowFunction>(
              m_windowFunctionComboBox->itemData(index).value<int>());
  }

  void SettingsDialog::inputDeviceChanged(int index)
  {
      m_inputDevice = m_inputDeviceComboBox->itemData(index).value<QAudioDeviceInfo>();
  }

  void SettingsDialog::outputDeviceChanged(int index)
  {
      m_outputDevice = m_outputDeviceComboBox->itemData(index).value<QAudioDeviceInfo>();
  }