tonegeneratordialog.cpp Example File

multimedia/spectrum/app/tonegeneratordialog.cpp
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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); }