tonegeneratordialog.cpp Example File

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

  const int ToneGeneratorFreqMin = 1;
  const int ToneGeneratorFreqMax = 1000;
  const int ToneGeneratorFreqDefault = 440;
  const int ToneGeneratorAmplitudeDefault = 75;

  ToneGeneratorDialog::ToneGeneratorDialog(QWidget *parent)
      :   QDialog(parent)
      ,   m_toneGeneratorSweepCheckBox(new QCheckBox(tr("Frequency sweep"), this))
      ,   m_frequencySweepEnabled(true)
      ,   m_toneGeneratorControl(new QWidget(this))
      ,   m_toneGeneratorFrequencyControl(new QWidget(this))
      ,   m_frequencySlider(new QSlider(Qt::Horizontal, this))
      ,   m_frequencySpinBox(new QSpinBox(this))
      ,   m_frequency(ToneGeneratorFreqDefault)
      ,   m_amplitudeSlider(new QSlider(Qt::Horizontal, this))
  {
      QVBoxLayout *dialogLayout = new QVBoxLayout(this);

      m_toneGeneratorSweepCheckBox->setChecked(true);

      // Configure tone generator controls
      m_frequencySlider->setRange(ToneGeneratorFreqMin, ToneGeneratorFreqMax);
      m_frequencySlider->setValue(ToneGeneratorFreqDefault);
      m_frequencySpinBox->setRange(ToneGeneratorFreqMin, ToneGeneratorFreqMax);
      m_frequencySpinBox->setValue(ToneGeneratorFreqDefault);
      m_amplitudeSlider->setRange(0, 100);
      m_amplitudeSlider->setValue(ToneGeneratorAmplitudeDefault);

      // Add widgets to layout
      QGridLayout *frequencyControlLayout = new QGridLayout;
      QLabel *frequencyLabel = new QLabel(tr("Frequency (Hz)"), this);
      frequencyControlLayout->addWidget(frequencyLabel, 0, 0, 2, 1);
      frequencyControlLayout->addWidget(m_frequencySlider, 0, 1);
      frequencyControlLayout->addWidget(m_frequencySpinBox, 1, 1);
      m_toneGeneratorFrequencyControl->setLayout(frequencyControlLayout);
      m_toneGeneratorFrequencyControl->setEnabled(false);

      QGridLayout *toneGeneratorLayout = new QGridLayout;
      QLabel *amplitudeLabel = new QLabel(tr("Amplitude"), this);
      toneGeneratorLayout->addWidget(m_toneGeneratorSweepCheckBox, 0, 1);
      toneGeneratorLayout->addWidget(m_toneGeneratorFrequencyControl, 1, 0, 1, 2);
      toneGeneratorLayout->addWidget(amplitudeLabel, 2, 0);
      toneGeneratorLayout->addWidget(m_amplitudeSlider, 2, 1);
      m_toneGeneratorControl->setLayout(toneGeneratorLayout);
      m_toneGeneratorControl->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
      dialogLayout->addWidget(m_toneGeneratorControl);

      // Connect
      CHECKED_CONNECT(m_toneGeneratorSweepCheckBox, SIGNAL(toggled(bool)),
                      this, SLOT(frequencySweepEnabled(bool)));
      CHECKED_CONNECT(m_frequencySlider, SIGNAL(valueChanged(int)),
                      m_frequencySpinBox, SLOT(setValue(int)));
      CHECKED_CONNECT(m_frequencySpinBox, SIGNAL(valueChanged(int)),
                      m_frequencySlider, SLOT(setValue(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);
  }

  ToneGeneratorDialog::~ToneGeneratorDialog()
  {

  }

  bool ToneGeneratorDialog::isFrequencySweepEnabled() const
  {
      return m_toneGeneratorSweepCheckBox->isChecked();
  }

  qreal ToneGeneratorDialog::frequency() const
  {
      return qreal(m_frequencySlider->value());
  }

  qreal ToneGeneratorDialog::amplitude() const
  {
      return qreal(m_amplitudeSlider->value()) / 100.0;
  }

  void ToneGeneratorDialog::frequencySweepEnabled(bool enabled)
  {
      m_frequencySweepEnabled = enabled;
      m_toneGeneratorFrequencyControl->setEnabled(!enabled);
  }