A subclass of AudioProcessorParameter that provides an easy way to create a parameter which maps onto a given NormalisableRange. More...

#include <juce_AudioParameterFloat.h>

Inheritance diagram for AudioParameterFloat:

Public Member Functions
	AudioParameterFloat (const ParameterID &parameterID, const String &parameterName, NormalisableRange< float > normalisableRange, float defaultValue, const AudioParameterFloatAttributes &attributes={})
	Creates a AudioParameterFloat with the specified parameters.

	AudioParameterFloat (const ParameterID &parameterID, const String &parameterName, NormalisableRange< float > normalisableRange, float defaultValue, const String &parameterLabel, Category parameterCategory=AudioProcessorParameter::genericParameter, std::function< String(float value, int maximumStringLength)> stringFromValue=nullptr, std::function< float(const String &text)> valueFromString=nullptr)
	Creates a AudioParameterFloat with the specified parameters.

	AudioParameterFloat (const ParameterID &parameterID, const String &parameterName, float minValue, float maxValue, float defaultValue)
	Creates a AudioParameterFloat with an ID, name, and range.

	~AudioParameterFloat () override
	Destructor.

float	get () const noexcept
	Returns the parameter's current value.

	operator float () const noexcept
	Returns the parameter's current value.

AudioParameterFloat &	operator= (float newValue)
	Changes the parameter's current value.

const NormalisableRange< float > &	getNormalisableRange () const override
	Returns the range of values that the parameter can take.

Public Member Functions inherited from RangedAudioParameter
int	getNumSteps () const override
	Returns the number of steps for this parameter based on the normalisable range's interval.

float	convertTo0to1 (float v) const noexcept
	Normalises and snaps a value based on the normalisable range.

float	convertFrom0to1 (float v) const noexcept
	Denormalises and snaps a value based on the normalisable range.

	AudioProcessorParameterWithID (const ParameterID &parameterID, const String &parameterName, const AudioProcessorParameterWithIDAttributes &attributes={})
	The creation of this object requires providing a name and ID which will be constant for its lifetime.

	AudioProcessorParameterWithID (const ParameterID &parameterID, const String &parameterName, const String &parameterLabel, Category parameterCategory=AudioProcessorParameter::genericParameter)
	The creation of this object requires providing a name and ID which will be constant for its lifetime.

Public Member Functions inherited from AudioProcessorParameterWithID
	AudioProcessorParameterWithID (const ParameterID &parameterID, const String &parameterName, const AudioProcessorParameterWithIDAttributes &attributes={})
	The creation of this object requires providing a name and ID which will be constant for its lifetime.

	AudioProcessorParameterWithID (const ParameterID &parameterID, const String &parameterName, const String &parameterLabel, Category parameterCategory=AudioProcessorParameter::genericParameter)
	The creation of this object requires providing a name and ID which will be constant for its lifetime.

String	getName (int) const override
	Returns the name to display for this parameter, which should be made to fit within the given string length.

String	getLabel () const override
	Some parameters may be able to return a label string for their units.

Category	getCategory () const override
	Returns the parameter's category.

String	getParameterID () const override
	Returns an ID that is unique to this parameter.

bool	isMetaParameter () const override
	Should return true if this parameter is a "meta" parameter.

bool	isAutomatable () const override
	Returns true if the host can automate this parameter.

bool	isOrientationInverted () const override
	This can be overridden to tell the host that this parameter operates in the reverse direction.

Public Member Functions inherited from HostedAudioProcessorParameter
	AudioProcessorParameter () noexcept=default

	AudioProcessorParameter (int versionHint)
	The version hint supplied to this constructor is used in Audio Unit plugins to aid ordering parameter identifiers when JUCE_FORCE_USE_LEGACY_PARAM_IDS is not enabled.

Public Member Functions inherited from AudioProcessorParameter
	AudioProcessorParameter () noexcept=default

	AudioProcessorParameter (int versionHint)
	The version hint supplied to this constructor is used in Audio Unit plugins to aid ordering parameter identifiers when JUCE_FORCE_USE_LEGACY_PARAM_IDS is not enabled.

virtual	~AudioProcessorParameter ()
	Destructor.

void	setValueNotifyingHost (float newValue)
	A processor should call this when it needs to change one of its parameters.

void	beginChangeGesture ()
	Sends a signal to the host to tell it that the user is about to start changing this parameter.

void	endChangeGesture ()
	Tells the host that the user has finished changing this parameter.

virtual bool	isDiscrete () const
	Returns whether the parameter uses discrete values, based on the result of getNumSteps, or allows the host to select values continuously.

virtual bool	isBoolean () const
	Returns whether the parameter represents a boolean switch, typically with "On" and "Off" states.

int	getParameterIndex () const noexcept
	Returns the index of this parameter in its parent processor's parameter list.

virtual String	getCurrentValueAsText () const
	Returns the current value of the parameter as a String.

virtual StringArray	getAllValueStrings () const
	Returns the set of strings which represent the possible states a parameter can be in.

int	getVersionHint () const

void	addListener (Listener *newListener)
	Registers a listener to receive events when the parameter's state changes.

void	removeListener (Listener *listener)
	Removes a previously registered parameter listener.

void	sendValueChangedMessageToListeners (float newValue)

Public Attributes
NormalisableRange< float >	range
	Provides access to the parameter's range.

Public Attributes inherited from AudioProcessorParameterWithID
const String	paramID
	Provides access to the parameter's ID string.

const String	name
	Provides access to the parameter's name.

const String	label
	Provides access to the parameter's label.

const Category	category
	Provides access to the parameter's category.

Protected Member Functions
virtual void	valueChanged (float newValue)
	Override this method if you are interested in receiving callbacks when the parameter value changes.

Additional Inherited Members
Public Types inherited from AudioProcessorParameter
enum	Category { genericParameter = (0 << 16) \| 0 , inputGain = (1 << 16) \| 0 , outputGain = (1 << 16) \| 1 , inputMeter = (2 << 16) \| 0 , outputMeter = (2 << 16) \| 1 , compressorLimiterGainReductionMeter = (2 << 16) \| 2 , expanderGateGainReductionMeter = (2 << 16) \| 3 , analysisMeter = (2 << 16) \| 4 , otherMeter = (2 << 16) \| 5 }

Detailed Description

A subclass of AudioProcessorParameter that provides an easy way to create a parameter which maps onto a given NormalisableRange.

See also: AudioParameterInt, AudioParameterBool, AudioParameterChoice

Constructor & Destructor Documentation

◆ AudioParameterFloat() [1/3]

AudioParameterFloat::AudioParameterFloat	(	const ParameterID &	parameterID,
		const String &	parameterName,
		NormalisableRange< float >	normalisableRange,
		float	defaultValue,
		const AudioParameterFloatAttributes &	attributes = {} )

Creates a AudioParameterFloat with the specified parameters.

Note that the attributes argument is optional and only needs to be supplied if you want to change options from their default values.

Example usage:

auto attributes = AudioParameterFloatAttributes().withStringFromValueFunction ([] (auto x, auto) { return String (x * 100); })
                                                 .withLabel ("%");
auto param = std::make_unique<AudioParameterFloat> ("paramID", "Parameter Name", NormalisableRange<float>(), 0.5f, attributes);

Parameters

parameterID	The parameter ID to use
parameterName	The parameter name to use
normalisableRange	The NormalisableRange to use
defaultValue	The non-normalised default value
attributes	Optional characteristics

◆ AudioParameterFloat() [2/3]

AudioParameterFloat::AudioParameterFloat	(	const ParameterID &	parameterID,
		const String &	parameterName,
		NormalisableRange< float >	normalisableRange,
		float	defaultValue,
		const String &	parameterLabel,
		Category	parameterCategory = AudioProcessorParameter::genericParameter,
		std::function< String(float value, int maximumStringLength)>	stringFromValue = nullptr,
		std::function< float(const String &text)>	valueFromString = nullptr )

Creates a AudioParameterFloat with the specified parameters.

Parameters

parameterID	The parameter ID to use
parameterName	The parameter name to use
normalisableRange	The NormalisableRange to use
defaultValue	The non-normalised default value
parameterLabel	An optional label for the parameter's value
parameterCategory	An optional parameter category
stringFromValue	An optional lambda function that converts a non-normalised value to a string with a maximum length. This may be used by hosts to display the parameter's value.
valueFromString	An optional lambda function that parses a string and converts it into a non-normalised value. Some hosts use this to allow users to type in parameter values.

◆ AudioParameterFloat() [3/3]

AudioParameterFloat::AudioParameterFloat	(	const ParameterID &	parameterID,
		const String &	parameterName,
		float	minValue,
		float	maxValue,
		float	defaultValue )

Creates a AudioParameterFloat with an ID, name, and range.

On creation, its value is set to the default value. For control over skew factors, you can use the other constructor and provide a NormalisableRange.

◆ ~AudioParameterFloat()

AudioParameterFloat::~AudioParameterFloat ( )

override

Destructor.

Member Function Documentation

◆ get()

float AudioParameterFloat::get ( ) const

noexcept

Returns the parameter's current value.

◆ operator float()

AudioParameterFloat::operator float ( ) const

noexcept

Returns the parameter's current value.

◆ operator=()

AudioParameterFloat & AudioParameterFloat::operator= ( float newValue )

Changes the parameter's current value.

◆ getNormalisableRange()

const NormalisableRange< float > & AudioParameterFloat::getNormalisableRange ( ) const

overridevirtual

Returns the range of values that the parameter can take.

Implements RangedAudioParameter.

◆ valueChanged()

virtual void AudioParameterFloat::valueChanged ( float newValue )

protectedvirtual

Override this method if you are interested in receiving callbacks when the parameter value changes.

Member Data Documentation

◆ range

NormalisableRange<float> AudioParameterFloat::range

Provides access to the parameter's range.

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

juce_AudioParameterFloat.h

Public Member Functions

Public Attributes

Protected Member Functions

Additional Inherited Members