Class RatatoskDepthInfoSubscriber

Inheritance Relationships

Base Type

  • public QObject

Class Documentation

class RatatoskDepthInfoSubscriber : public QObject

Subscriber for DDS type ratatosk::types::DepthInfo as a QML element.

This class is a QML element and enables QML applications to gain access to a DDS signal type as a read-only QML property.

Public Functions

explicit RatatoskDepthInfoSubscriber(QObject *parent = nullptr)


The initialization is deferred to an init() function.


parent[in] QObject pointer.

virtual ~RatatoskDepthInfoSubscriber()


double depth() const

Property accessor for depth in QML.


depth [m]

double depthBelowTransducer() const

Property accessor for depthBelowTransducer in QML.


depth below transducer [m]

QDateTime timestamp() const

Property accessor for timestamp in QML.


Timestamp as QML compatible type.

void init(QtToDds *dds, const QString &topic, bool with_listener = true)

Initializes DDS reader and connects Qt signals and slots.

  • dds[in] Pointer to QtToDds instance.

  • topic[in] Name of DDS topic for which to subscribe.

  • with_listener[in] Use DdsReaderListener callback to trigger eventHeard() signal.

Public Slots

void updateValue()

Takes all new samples from the subscribed topic and uses the last sample.

This slot calls take() from the DDS reader and stores the last new sample as the current value. If there were a new sample it emits <…>Changed().


void depthChanged(double depth)

DDS value has changed.

This signal is connected to the QML RatatoskDepthInfoSubscriber::depth property.


depth[out] New value.

void depthBelowTransducerChanged(double depthBelowTransducer)

DDS value has changed.

This signal is connected to the QML RatatoskDepthInfoSubscriber::depthBelowTransducer property.


depthBelowTransducer[out] New value.

void timestampChanged(QDateTime timestamp)

Timestamp of DDS value has changed.

This signal is connected to the QML RatatoskDepthInfoSubscriber::timestamp property.


timestamp[out] New timestamp value.

void eventHeard()

DdsReaderListener calls this signal when there is data available on the subscribed topic.

If RatatoskDepthInfoSubscriber is initialized with_listener=true, eventHeard() will be connected to the slot updateValue().


double depth

Depth [m].

double depthBelowTransducer

Depth Below Transducer [m].

QDateTime timestamp

Timestamp of sample.

Private Members

std::unique_ptr<sinspekto::Reader<ratatosk::types::DepthInfo>> m_reader

The DDS reader wrapper class.