Subscriber of a single scalar value. More...

#include <ScalarSubscriber.h>

Inheritance diagram for QtPdCom::ScalarSubscriber:

Classes
class	Impl

Public Member Functions
	ScalarSubscriber ()
	Constructor.
virtual	~ScalarSubscriber ()
	Destructor.
void	setVariable (PdCom::Variable pv, const PdCom::Selector &selector={}, const Transmission &=event_mode, double scale=1.0, double offset=0.0, double tau=0.0)
	Subscribe to a process variable via variable.
void	setVariable (PdCom::Process *process, const QString &path, const PdCom::Selector &selector={}, const Transmission &=event_mode, double scale=1.0, double offset=0.0, double tau=0.0)
	Subscribe to a process variable via process and path.
void	clearVariable ()
	Unsubscribe from a Variable.
bool	hasVariable () const
	Subscription active.
virtual void	newValues (std::chrono::nanoseconds)=0
virtual void	stateChange (PdCom::Subscription::State)
template<class T>
void	writeValue (T)
	Write a value to the process.
double	getFilterConstant () const
PdCom::Variable	getVariable () const
const void *	getData () const
Q_INVOKABLE bool	poll ()
	Poll an active subscription.

Protected Member Functions
const PdCom::Selector &	getSelector () const

Protected Attributes
double	scale
double	offset

Private Member Functions
	ScalarSubscriber (const ScalarSubscriber &)

Private Attributes
struct Q_DECL_HIDDEN	Impl
std::unique_ptr< Impl >	impl

Detailed Description

Subscriber of a single scalar value.

Constructor & Destructor Documentation

◆ ScalarSubscriber() [1/2]

ScalarSubscriber::ScalarSubscriber ( )

Constructor.

References impl, offset, and scale.

Referenced by QtPdCom::ScalarSubscriber::Impl::Impl(), and ScalarSubscriber().

◆ ~ScalarSubscriber()

ScalarSubscriber::~ScalarSubscriber ( )

virtual

Destructor.

References clearVariable().

◆ ScalarSubscriber() [2/2]

QtPdCom::ScalarSubscriber::ScalarSubscriber ( const ScalarSubscriber & )

private

References ScalarSubscriber().

Member Function Documentation

◆ clearVariable()

void ScalarSubscriber::clearVariable ( )

Unsubscribe from a Variable.

References impl, and stateChange().

Referenced by setVariable(), setVariable(), and ~ScalarSubscriber().

◆ getData()

const void * ScalarSubscriber::getData ( ) const

References impl.

Referenced by QtPdCom::AbstractScalarVariable::copyData(), and newValues().

◆ getFilterConstant()

double ScalarSubscriber::getFilterConstant ( ) const

References impl.

Referenced by newValues().

◆ getSelector()

const PdCom::Selector & ScalarSubscriber::getSelector ( ) const

protected

References impl.

Referenced by writeValue().

◆ getVariable()

PdCom::Variable ScalarSubscriber::getVariable ( ) const

References impl.

Referenced by QtPdCom::AbstractScalarVariable::copyData(), newValues(), QtPdCom::ScalarSubscriber::Impl::ScalarSubscription::stateChanged(), and writeValue().

◆ hasVariable()

bool ScalarSubscriber::hasVariable ( ) const

Subscription active.

References impl.

Referenced by writeValue().

◆ newValues()

virtual void QtPdCom::ScalarSubscriber::newValues ( std::chrono::nanoseconds )

pure virtual

Implemented in QtPdCom::ScalarVariable< T >, QtPdCom::ScalarVariable< bool >, QtPdCom::ScalarVariable< double >, and QtPdCom::ScalarVariable< int >.

References getData(), getFilterConstant(), getVariable(), poll(), stateChange(), and writeValue().

◆ poll()

bool QtPdCom::ScalarSubscriber::poll ( )

Poll an active subscription.

Returns: false if variable could not be polled.

References impl.

Referenced by newValues(), and QtPdCom::ScalarSubscriber::Impl::ScalarSubscription::stateChanged().

◆ setVariable() [1/2]

void ScalarSubscriber::setVariable	(	PdCom::Process *	process,
		const QString &	path,
		const PdCom::Selector &	selector = {},
		const Transmission &	transmission = event_mode,
		double	scale = 1.0,
		double	offset = 0.0,
		double	tau = 0.0 )

Subscribe to a process variable via process and path.

Subscribes to a ProcessVariable.

Parameters

process	Process.
path	Variable path.
selector	Selector.
transmission	Transmission details.
scale	Scale factor.
offset	Offset (applied after scaling).
tau	PT1 filter time constant. A value less or equal to 0.0 means, that no filter is applied.

References clearVariable(), QtPdCom::Transmission::getInterval(), impl, QtPdCom::Transmission::isContinuous(), QtPdCom::Transmission::isPoll(), offset, scale, and QtPdCom::Transmission::toString().

◆ setVariable() [2/2]

void ScalarSubscriber::setVariable	(	PdCom::Variable	pv,
		const PdCom::Selector &	selector = {},
		const Transmission &	transmission = event_mode,
		double	scale = 1.0,
		double	offset = 0.0,
		double	tau = 0.0 )

Subscribe to a process variable via variable.

Subscribes to a ProcessVariable.

Parameters

pv	Process variable.
selector	Selector.
transmission	Transmission details.
scale	Scale factor.
offset	Offset (applied after scaling).
tau	PT1 filter time constant. A value less or equal to 0.0 means, that no filter is applied.