void MainWindow::initializeQMLComponent()
{
QDeclarativeContext *context = m_view->rootContext();
#if defined(Q_WS_MAEMO_5) || defined(QT_NO_OPENGL)
// Set UI to low performance mode for Maemo5 and Symbian^1. This mainly
// disables antialiasing on some performance costly elements.
context->setContextProperty("lowPerf", true);
#else
context->setContextProperty("lowPerf", false);
#endif
#ifdef Q_OS_SYMBIAN
context->setContextProperty("sampleFolder", "file:");
#else
context->setContextProperty("sampleFolder", QString("file:/") +
QDir::currentPath());
#endif
#ifdef Q_WS_MAEMO_6
// Hide the exit button in Harmattan
context->setContextProperty("exitButtonVisible", false);
#else
context->setContextProperty("exitButtonVisible", true);
#endif
m_view->setSource(QUrl("qrc:/qml/Main.qml"));
// Create Qt settings object to load / store app settings
m_settings = new QSettings("Nokia", "DJTurntable");
// Create Qt objects to handle Turntable and Drum machine
m_turntable = new Turntable(m_settings, this);
m_drumMachine = new DrumMachine(m_settings, this);
m_turntable->addAudioSource(m_drumMachine);
// Find out the interesting Qt objects of the QML elements
QObject *turntableQML = dynamic_cast<QObject*>(m_view->rootObject());
QObject *sampleSelectorQML =
m_view->rootObject()->findChild<QObject*>("sampleSelector");
QObject *drumMachineQML =
m_view->rootObject()->findChild<QObject*>("drumMachine");
// If there are errors in QML code and the elements does not exist,
// they won't be found Qt side either, check existance of the elements.
if (!turntableQML || !sampleSelectorQML || !drumMachineQML) {
QMessageBox::warning(NULL, "Warning",
"Failed to resolve QML elements in main.cpp");
return;
}
// Turntable connections
connect(turntableQML, SIGNAL(start()),
m_turntable, SLOT(start()));
connect(turntableQML, SIGNAL(stop()),
m_turntable, SLOT(stop()));
connect(turntableQML, SIGNAL(diskAimSpeed(QVariant)),
m_turntable, SLOT(setDiscAimSpeed(QVariant)));
connect(turntableQML, SIGNAL(diskSpeed(QVariant)),
m_turntable, SLOT(setDiscSpeed(QVariant)));
connect(turntableQML, SIGNAL(cutOff(QVariant)),
m_turntable, SLOT(setCutOff(QVariant)));
connect(turntableQML, SIGNAL(resonance(QVariant)),
m_turntable, SLOT(setResonance(QVariant)));
connect(turntableQML, SIGNAL(seekToPosition(QVariant)),
m_turntable, SLOT(seekToPosition(QVariant)));
connect(m_turntable, SIGNAL(audioPosition(QVariant)),
turntableQML, SLOT(audioPosition(QVariant)));
connect(m_turntable, SIGNAL(powerOff()),
turntableQML, SLOT(powerOff()));
// SampleSelector connections
connect(sampleSelectorQML, SIGNAL(sampleSelected(QVariant)),
m_turntable, SLOT(setSample(QVariant)));
connect(sampleSelectorQML, SIGNAL(defaultSample()),
m_turntable, SLOT(openDefaultSample()));
connect(m_turntable, SIGNAL(sampleOpened(QVariant)),
sampleSelectorQML, SLOT(setCurrentSample(QVariant)));
connect(m_turntable, SIGNAL(error(QVariant, QVariant)),
sampleSelectorQML, SLOT(showError(QVariant, QVariant)));
// DrumMachine connections
connect(drumMachineQML, SIGNAL(startBeat()),
m_drumMachine, SLOT(startBeat()));
connect(drumMachineQML, SIGNAL(stopBeat()),
m_drumMachine, SLOT(stopBeat()));
connect(drumMachineQML, SIGNAL(setBeat(QVariant)),
m_drumMachine, SLOT(setBeat(QVariant)));
connect(drumMachineQML,
SIGNAL(drumButtonToggled(QVariant, QVariant, QVariant)),
m_drumMachine,
SLOT(drumButtonToggled(QVariant, QVariant, QVariant)));
connect(drumMachineQML, SIGNAL(drumMachineSpeed(QVariant)),
m_drumMachine, SLOT(setBeatSpeed(QVariant)));
connect(m_drumMachine,
SIGNAL(drumButtonState(QVariant, QVariant, QVariant)),
drumMachineQML,
SLOT(setDrumButton(QVariant, QVariant, QVariant)));
connect(m_drumMachine, SIGNAL(tickChanged(QVariant)),
drumMachineQML, SLOT(highlightTick(QVariant)));
// Framework connections
connect((QObject*)m_view->engine(), SIGNAL(quit()), qApp, SLOT(quit()));
#if defined(Q_OS_SYMBIAN) || defined(Q_WS_MAEMO_5) || defined(Q_WS_MAEMO_6)
#ifndef QT_NO_OPENGL
// Create Qt accelerometer objects
m_accelerometer = new QAccelerometer(this);
m_accelerometerFilter = new AccelerometerFilter;
// Does not take the ownership of the filter
m_accelerometer->addFilter(m_accelerometerFilter);
m_accelerometer->setDataRate(50);
// Create Qt objects for accessing profile information
m_deviceInfo = new QSystemDeviceInfo(this);
m_turntable->profile(m_deviceInfo->currentProfile());
connect(m_accelerometerFilter, SIGNAL(rotationChanged(QVariant)),
turntableQML, SLOT(inclination(QVariant)));
connect(m_deviceInfo,
SIGNAL(currentProfileChanged(QSystemDeviceInfo::Profile)),
m_turntable,
SLOT(profile(QSystemDeviceInfo::Profile)));
// Begin the measuring of the accelerometer sensor
m_accelerometer->start();
#endif
#endif
m_turntable->openLastSample();
m_drumMachine->setBeat(0);
}
TimeSignature::TimeSignature(Staff* staff, int startTime, int beats, int beat, TimeSignatureType type) : StaffElement(staff, startTime), d(new Private)
{
setBeats(beats);
setBeat(beat);
d->type = type;
}