An ObservableValue that saves its value to the configuration. More...

#include <sensesp/system/observablevalue.h>

Inheritance diagram for sensesp::PersistingObservableValue< T >:

Public Member Functions
	PersistingObservableValue (const T &value, String config_path="")

virtual void	set (const T &value) override

virtual bool	to_json (JsonObject &doc) override

virtual bool	from_json (const JsonObject &config) override

Public Member Functions inherited from sensesp::ObservableValue< T >
	ObservableValue ()=default

	ObservableValue (const T &value)

	ObservableValue (const ObservableValue &)=delete

ObservableValue &	operator= (const ObservableValue &)=delete

const T &	operator= (const T &value)

T &	operator++ ()

T &	operator-- ()

T	operator++ (int)

T	operator-- (int)

const T &	operator+= (const T &value)

const T &	operator-= (const T &value)

Public Member Functions inherited from sensesp::ValueConsumer< T >
virtual void	set_input (const T &new_value)

void	connect_from (ValueProducer< T > *producer)

Public Member Functions inherited from sensesp::ValueProducer< T >
	ValueProducer ()

	ValueProducer (const T &initial_value)

virtual const T &	get () const

template<typename VConsumer>
std::enable_if< std::is_base_of< ValueConsumer< typenameVConsumer::input_type >, VConsumer >::value &&std::is_convertible< T, typenameVConsumer::input_type >::value, std::shared_ptr< VConsumer > >::type	connect_to (std::shared_ptr< VConsumer > consumer)
	Connect a producer to a transform with a different input type.

template<typename VConsumer>
std::enable_if< std::is_base_of< ValueConsumer< typenameVConsumer::input_type >, VConsumer >::value &&std::is_convertible< T, typenameVConsumer::input_type >::value, VConsumer * >::type	connect_to (VConsumer *consumer)

template<typename VConsumer>
std::enable_if< std::is_base_of< ValueConsumer< typenameVConsumer::input_type >, VConsumer >::value &&std::is_convertible< T, typenameVConsumer::input_type >::value, VConsumer * >::type	connect_to (VConsumer &consumer)

void	emit (const T &new_value)

Public Member Functions inherited from sensesp::Observable
	Observable ()

	Observable (Observable &&other)
	Move constructor.

void	notify ()

void	attach (std::function< void()> observer)

Public Member Functions inherited from sensesp::FileSystemSaveable
	FileSystemSaveable (const String &config_path)

virtual bool	load () override
	Load and populate the object from a persistent storage.

virtual bool	save () override
	Save the object to a persistent storage.

virtual bool	clear () override
	Delete the data from a persistent storage.

bool	find_config_file (const String &config_path, String &filename)

Public Member Functions inherited from sensesp::Saveable
	Saveable (const String &config_path)

virtual bool	refresh ()
	Refresh the object. This may or may not access the persistent storage but is not expected to overwrite the object's state.

const String &	get_config_path () const

Additional Inherited Members
Public Types inherited from sensesp::ValueConsumer< T >
using	input_type = T

Protected Attributes inherited from sensesp::ValueProducer< T >
T	output_

Protected Attributes inherited from sensesp::Saveable
const String	config_path_

Detailed Description

template<class T>
class sensesp::PersistingObservableValue< T >

An ObservableValue that saves its value to the configuration.

Only use this class for values that change infrequently. Frequent writes to the configuration can wear out the flash memory.

Template Parameters

T

Definition at line 95 of file observablevalue.h.

Constructor & Destructor Documentation

◆ PersistingObservableValue()

template<class T>

sensesp::PersistingObservableValue< T >::PersistingObservableValue	(	const T &	value,
		String	config_path = "" )

inline

Definition at line 98 of file observablevalue.h.

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Member Function Documentation

◆ from_json()

template<class T>

virtual bool sensesp::PersistingObservableValue< T >::from_json ( const JsonObject & root )

inlineoverridevirtual

Deserializes the current object data from a JsonObject.

Reimplemented from sensesp::Serializable.

Definition at line 116 of file observablevalue.h.

◆ set()

template<class T>

virtual void sensesp::PersistingObservableValue< T >::set ( const T & new_value )

inlineoverridevirtual

Used to set an input of this consumer. It is called automatically by a ValueProducer but can also be called manually.

Parameters

new_value the value of the input

Reimplemented from sensesp::ObservableValue< T >.

Definition at line 106 of file observablevalue.h.

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◆ to_json()

template<class T>

virtual bool sensesp::PersistingObservableValue< T >::to_json ( JsonObject & root )

inlineoverridevirtual

Serializes the current object data into a JsonObject.

Reimplemented from sensesp::Serializable.

Definition at line 111 of file observablevalue.h.

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

src/sensesp/system/observablevalue.h

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ PersistingObservableValue()

Member Function Documentation

◆ from_json()

◆ set()

◆ to_json()