sensoritem.cpp Example File

sensor_explorer/import/sensoritem.cpp


  
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#include "sensoritem.h" #include <QtCore/QDebug> #include <QtSensors> /* \class QSensorItem \brief The QSensorItem type provides information about the metadata from a sensors installed on the system. */ /* Construct a QSensorItem object with parent \a parent */ QSensorItem::QSensorItem(QObject* parent) : QObject(parent) , _qsensor(0) { } /* Construct a QSensorItem object with QSensor \a sensor and parent \a parent */ QSensorItem::QSensorItem(QSensor* sensor, QObject* parent) : QObject(parent) , _qsensor(sensor) { } /* Destructor of a QSensorItem */ QSensorItem::~QSensorItem() { } /* \fn QSensorItem::startChanged() Notifies the client if the sensors has changed its start active status */ /* \property QSensorItem::start This property starts or stops the sensor */ bool QSensorItem::start() { return (_qsensor ? _qsensor->isActive() : false); } void QSensorItem::setStart(bool run) { if (_qsensor) _qsensor->setActive(run); } /* \property QSensorItem::id Returns the sensor id of the sensor item */ QString QSensorItem::id() { return (_qsensor ? _qsensor->identifier() : ""); } /* Set the new value \a val to the QPropertyInfo object \a property */ void QSensorItem::changePropertyValue(QPropertyInfo* property, const QString& val) { if (_qsensor && _sensorProperties.contains(property)){ if ( _qsensor->setProperty(property->name().toLatin1().constData(), QVariant(val))) updateSensorPropertyValues(); else qWarning() << "new property value couldn't be set"; } } /* Reading the metadata and activates the sensor. */ void QSensorItem::select() { if (_sensorProperties.isEmpty()) { // Probe the reading using Qt's meta-object facilities //Read properties from reader QSensorReading *reading = _qsensor->reading(); const QMetaObject *mo = reading->metaObject(); int firstProperty = QSensorReading::staticMetaObject.propertyOffset(); for (int i = firstProperty; i < mo->propertyCount(); ++i) { QString typeName = QLatin1String(mo->property(i).typeName()); int crap = typeName.lastIndexOf("::"); if (crap != -1) typeName = typeName.mid(crap + 2); QPropertyInfo* pi = new QPropertyInfo(mo->property(i).name() , i , isWriteable(mo->property(i).name()) , typeName , "-" , this); _readerProperties.append(pi); } //Read properties from sensor const QMetaObject *mo1 = _qsensor->metaObject(); firstProperty = QSensorReading::staticMetaObject.propertyOffset(); for (int i = firstProperty; i < mo1->propertyCount(); ++i) { QString propertyname = mo1->property(i).name(); if (ignoreProperty(propertyname)) continue; QString typeName = QLatin1String(mo1->property(i).typeName()); int crap = typeName.lastIndexOf("::"); if (crap != -1) typeName = typeName.mid(crap + 2); QPropertyInfo* pi = new QPropertyInfo(propertyname , i , isWriteable(propertyname) , typeName , "-" , this); _sensorProperties.append(pi); } updateSensorPropertyValues(); connect(_qsensor, SIGNAL(readingChanged()), this, SLOT(sensorReadingChanged())); } connect(_qsensor, SIGNAL(activeChanged()), SIGNAL(startChanged())); } /* Unselect the sensor by stopping the sensor. */ void QSensorItem::unSelect() { _qsensor->stop(); disconnect(_qsensor, SIGNAL(activeChanged()), this , SIGNAL(startChanged())); } /* Updates the property values from QSensor */ void QSensorItem::updateSensorPropertyValues() { if (_qsensor){ const QMetaObject *mo = _qsensor->metaObject(); for (int i = 0; i < _sensorProperties.count(); i++){ QVariant val = mo->property(_sensorProperties[i]->index()).read(_qsensor); _sensorProperties[i]->setValue(convertValue(_sensorProperties[i]->typeName(), val)); } } } /* \fn QSensorItem::propertiesChanged() Notifies the client if the list of the properties was changed */ /* Updates the property values from the QSensorReader */ void QSensorItem::sensorReadingChanged() { QSensorReading *reading = _qsensor->reading(); const QMetaObject *mo = reading->metaObject(); for (int i = 0; i < _readerProperties.count(); i++){ QVariant val = mo->property(_readerProperties[i]->index()).read(reading); _readerProperties[i]->setValue(convertValue(_readerProperties[i]->typeName(), val)); } } /* Returns true if the property with the name \a propertyname should be ignored */ bool QSensorItem::ignoreProperty(const QString& propertyname) { if (propertyname == "reading" || propertyname == "active" || propertyname == "identifier" || propertyname == "connectedToBackend" || propertyname == "busy") return true; return false; } /* Returns true if the property with the name \a propertyname is writeable */ bool QSensorItem::isWriteable(const QString& propertyname) { if (_qsensor){ const QMetaObject *mo = _qsensor->metaObject(); int propertyindex = mo->indexOfProperty(propertyname.toLocal8Bit().constData()); if (propertyindex >= 0){ QMetaProperty prop = mo->property(propertyindex); return prop.isWritable(); } else { QSensorReading *reading = _qsensor->reading(); const QMetaObject *moreader = reading->metaObject(); propertyindex = moreader->indexOfProperty(propertyname.toLocal8Bit().constData()); if (propertyindex >= 0){ QMetaProperty prop = mo->property(propertyindex); return prop.isWritable(); } } } return false; } /* Convert the variant \a val dependent on the type \a type and returns the converted value as a QString */ QString QSensorItem::convertValue(const QString& type, const QVariant& val) { if (type == "LightLevel"){ switch (val.toInt()) { case 1: return "Dark"; case 2: return "Twilight"; case 3: return "Light"; case 4: return "Bright"; case 5: return "Sunny"; default: return "Undefined"; } } else if (type == "Orientation"){ switch (val.toInt()) { case 1: return "TopUp"; case 2: return "TopDown"; case 3: return "LeftUp"; case 4: return "RightUp"; case 5: return "FaceUp"; case 6: return "FaceDown"; default: return "Undefined"; } } else if (type == "qrangelist"){ qrangelist rangelist = val.value<qrangelist>(); QStringList ranges; foreach (const qrange &r, rangelist) { if (r.first == r.second) ranges << QString("%1 Hz").arg(r.first); else ranges << QString("%1-%2 Hz").arg(r.first).arg(r.second); } if (ranges.count() > 0) return ranges.join(", "); return "-"; } else if (type == "qoutputrangelist") { qoutputrangelist rangelist = val.value<qoutputrangelist>(); QStringList ranges; foreach (const qoutputrange &r, rangelist) { ranges << QString("(%1, %2) += %3").arg(r.minimum).arg(r.maximum).arg(r.accuracy); } if (ranges.count() > 0) return ranges.join(", "); return "-"; } return val.toString(); } /* \property QSensorItem::properties Returns a list of all properties from the sensor */ QQmlListProperty<QPropertyInfo> QSensorItem::properties() { _properties.clear(); _properties.append(_sensorProperties); _properties.append(_readerProperties); return QQmlListProperty<QPropertyInfo> (this, _properties); }

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