Class DdsIdVec4dBuffer¶

Defined in File DdsIdVec4dBuffer.hpp

Inheritance Relationships¶

Base Type¶

public DdsBuffer (Class DdsBuffer)

Class Documentation¶

class DdsIdVec4dBuffer : public DdsBuffer ¶

Buffer class for IdVec4d or BatchIdVec4d.

This class subscribes to a DDS topic and makes sure the buffers are updated with incoming data.

When updating a QAbstractSeries with DdsBuffer::updateSeries() in QML scripts, the following mapping from DDS member variables to qml_enums::DimId enums are used.

QML enum	Variable
`FKIN.T`	time
`FKIN.X`	x
`FKIN.Y`	y
`FKIN.Z`	z
`FKIN.W`	w

aBuffer.updateSeries(someSeries, FKIN.T, FKIN.W)

TODO: Add batch buffer.

Public Functions

explicit DdsIdVec4dBuffer(QObject *parent = nullptr)¶

Constructor.

The initialization of DDS instances are deferred to an init() function, but it initializes the data buffers.

Parameters: parent – [in] QObject pointer.

virtual ~DdsIdVec4dBuffer()¶: Destructor.

QPointF rangeX() const: Property accessor for x variable range.

QPointF rangeY() const: Property accessor for y variable range.

QPointF rangeZ() const: Property accessor for z variable range.

QPointF rangeW() const: Property accessor for w variable range.

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

Initializes DDS reader and connects Qt signals and slots.

Note

An instance of this class can only be buffer for a single DDS topic, so either type IdVec4d or BatchIdVec4d.

Parameters

dds – [in] Pointer to QtToDds instance.
topic – [in] Name of DDS topic for which to subscribe.
id – [in] Key identifier for the topic instance.
buffer_size – [in] Number of data points to store in the circular buffer.
with_listener – [in] Use DdsReaderListener callback to trigger eventHeard() signal.

Public Slots

virtual void updateBuffers()¶

Adds samples to the appropriate buffer.

Each data member of the DDS data structure is separated into an appropriate buffer. It picks the last sample and emits newData().

Signals

void rangeChanged(QPointF range, qml_enums::DimId dim)¶

Triggered when the range has changed.

See class documentation for supported DimId enums.

Note

For time dimension, use DdsBuffer::rangeTminChanged() and DdsBuffer::rangeTmaxChanged().

Parameters

range – [out] New range for the dimension.
dim – [out] The dimension in question.

void eventHeard()¶

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

If init() is called with_listener=true, eventHeard() will be connected to the slot updateBuffers().

void newData()¶: Signal whenever new data is added to the buffers.

Properties

QPointF rangeX¶: Data range of variable x.

QPointF rangeY¶: Data range of variable y.

QPointF rangeZ¶: Data range of variable z.

QPointF rangeW¶: Data range of variable w.

Private Members

std::unique_ptr<sinspekto::Reader<fkin::IdVec4d>> m_reader¶: The DDS reader wrapper class.

QString m_id¶: Key identifier for topic instance.