QtPdCom::ScalarSubscriber Class Reference

Subscriber of a single scalar value. More...

#include <ScalarSubscriber.h>

Inheritance diagram for QtPdCom::ScalarSubscriber:

Classes
class	Impl

Public Member Functions
	ScalarSubscriber ()
	Constructor. More...
virtual	~ScalarSubscriber ()
	Destructor. More...
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. More...
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. More...
void	clearVariable ()
	Unsubscribe from a Variable. More...
bool	hasVariable () const
	Subscription active. More...
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. More...
double	getFilterConstant () const
PdCom::Variable	getVariable () const
const void *	getData () const
Q_INVOKABLE bool	poll ()
	Poll an active subscription. More...

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.

~ScalarSubscriber()

ScalarSubscriber::~ScalarSubscriber ( )

virtual

Destructor.

References clearVariable().

ScalarSubscriber() [2/2]

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

private

Member Function Documentation

clearVariable()

void ScalarSubscriber::clearVariable

(

)

Unsubscribe from a Variable.

References impl, and stateChange().

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

getData()

const void * ScalarSubscriber::getData

(

)

const

References impl.

getFilterConstant()

double ScalarSubscriber::getFilterConstant

(

)

const

References impl.

getSelector()

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

protected

References impl.

Referenced by writeValue().

getVariable()

PdCom::Variable ScalarSubscriber::getVariable

(

)

const

References impl.

Referenced by 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< double >, and QtPdCom::ScalarVariable< int >.

Referenced by QtPdCom::ScalarSubscriber::Impl::ScalarSubscription::newValues().

poll()

bool QtPdCom::ScalarSubscriber::poll

(

)

Poll an active subscription.

Returns

false if variable could not be polled.

Referenced by QtPdCom::ScalarSubscriber::Impl::ScalarSubscription::stateChanged().

setVariable() [1/2]

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.

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

Referenced by QtPdCom::PdConnection::setVariable().

setVariable() [2/2]

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().

stateChange()

void ScalarSubscriber::stateChange ( PdCom::Subscription::State  )

virtual

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

writeValue()

template<class T >

void QtPdCom::ScalarSubscriber::writeValue

(

T

value

)

Write a value to the process.

This is a convenience function, that checks for the subscription, before writing the value.

References getSelector(), getVariable(), hasVariable(), offset, and scale.

Member Data Documentation

Impl

struct Q_DECL_HIDDEN QtPdCom::ScalarSubscriber::Impl

private

impl

std::unique_ptr<Impl> QtPdCom::ScalarSubscriber::impl

private

Referenced by clearVariable(), getData(), getFilterConstant(), getSelector(), getVariable(), hasVariable(), and setVariable().

offset

double QtPdCom::ScalarSubscriber::offset

protected

Referenced by setVariable(), and writeValue().

scale

double QtPdCom::ScalarSubscriber::scale

protected

Referenced by setVariable(), and writeValue().

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The documentation for this class was generated from the following files:

• QtPdCom1/ScalarSubscriber.h
• src/ScalarSubscriber.cpp