AudioParameterChoice Class Reference

Provides a class of AudioProcessorParameter that can be used to select an indexed, named choice from a list. More...

Inheritance diagram for AudioParameterChoice:

Public Member Functions
	AudioParameterChoice (const String &parameterID, const String &parameterName, const StringArray &choices, int defaultItemIndex, const String &parameterLabel=String(), std::function< String(int index, int maximumStringLength)> stringFromIndex=nullptr, std::function< int(const String &text)> indexFromString=nullptr)
	Creates a AudioParameterChoice with the specified parameters. More...
	~AudioParameterChoice () override
	Destructor. More...
int	getIndex () const noexcept
	Returns the current index of the selected item. More...
	operator int () const noexcept
	Returns the current index of the selected item. More...
String	getCurrentChoiceName () const noexcept
	Returns the name of the currently selected item. More...
	operator String () const noexcept
	Returns the name of the currently selected item. More...
AudioParameterChoice &	operator= (int newValue)
	Changes the selected item to a new index. More...
const NormalisableRange< float > &	getNormalisableRange () const override
	Returns the range of values that the parameter can take. More...
Public Member Functions inherited from RangedAudioParameter
	RangedAudioParameter (const String &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. More...
int	getNumSteps () const override
	Returns the number of steps for this parameter based on the normalisable range's interval. More...
float	convertTo0to1 (float v) const noexcept
	Normalises and snaps a value based on the normalisable range. More...
float	convertFrom0to1 (float v) const noexcept
	Denormalises and snaps a value based on the normalisable range. More...
Public Member Functions inherited from AudioProcessorParameterWithID
	AudioProcessorParameterWithID (const String &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. More...
	~AudioProcessorParameterWithID () override
	Destructor. More...
String	getName (int) const override
	Returns the name to display for this parameter, which should be made to fit within the given string length. More...
String	getLabel () const override
	Some parameters may be able to return a label string for their units. More...
Category	getCategory () const override
	Returns the parameter's category. More...
Public Member Functions inherited from AudioProcessorParameter
	AudioProcessorParameter () noexcept
virtual	~AudioProcessorParameter ()
	Destructor. More...
void	setValueNotifyingHost (float newValue)
	A processor should call this when it needs to change one of its parameters. More...
void	beginChangeGesture ()
	Sends a signal to the host to tell it that the user is about to start changing this parameter. More...
void	endChangeGesture ()
	Tells the host that the user has finished changing this parameter. More...
virtual bool	isBoolean () const
	Returns whether the parameter represents a boolean switch, typically with "On" and "Off" states. More...
virtual bool	isOrientationInverted () const
	This can be overridden to tell the host that this parameter operates in the reverse direction. More...
virtual bool	isAutomatable () const
	Returns true if the host can automate this parameter. More...
virtual bool	isMetaParameter () const
	Should return true if this parameter is a "meta" parameter. More...
int	getParameterIndex () const noexcept
	Returns the index of this parameter in its parent processor's parameter list. More...
virtual String	getCurrentValueAsText () const
	Returns the current value of the parameter as a String. More...
virtual StringArray	getAllValueStrings () const
	Returns the set of strings which represent the possible states a parameter can be in. More...
void	addListener (Listener *newListener)
	Registers a listener to receive events when the parameter's state changes. More...
void	removeListener (Listener *listener)
	Removes a previously registered parameter listener. More...
void	sendValueChangedMessageToListeners (float newValue)

Public Attributes
const StringArray	choices
	Provides access to the list of choices that this parameter is working with. More...
Public Attributes inherited from AudioProcessorParameterWithID
const String	paramID
	Provides access to the parameter's ID string. More...
const String	name
	Provides access to the parameter's name. More...
const String	label
	Provides access to the parameter's label. More...
const Category	category
	Provides access to the parameter's category. More...

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

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

Provides a class of AudioProcessorParameter that can be used to select an indexed, named choice from a list.

See also

AudioParameterFloat, AudioParameterInt, AudioParameterBool

Constructor & Destructor Documentation

AudioParameterChoice()

AudioParameterChoice::AudioParameterChoice	(	const String &	parameterID,
		const String &	parameterName,
		const StringArray &	choices,
		int	defaultItemIndex,
		const String &	parameterLabel = String(),
		std::function< String(int index, int maximumStringLength)>	stringFromIndex = nullptr,
		std::function< int(const String &text)>	indexFromString = nullptr
	)

Creates a AudioParameterChoice with the specified parameters.

Parameters

parameterID	The parameter ID to use
parameterName	The parameter name to use
choices	The set of choices to use
defaultItemIndex	The index of the default choice
parameterLabel	An optional label for the parameter's value
stringFromIndex	An optional lambda function that converts a choice index to a string with a maximum length. This may be used by hosts to display the parameter's value.
indexFromString	An optional lambda function that parses a string and converts it into a choice index. Some hosts use this to allow users to type in parameter values.

~AudioParameterChoice()

AudioParameterChoice::~AudioParameterChoice ( )

override

Destructor.

Member Function Documentation

getIndex()

int AudioParameterChoice::getIndex ( ) const

noexcept

Returns the current index of the selected item.

References roundToInt().

operator int()

AudioParameterChoice::operator int ( ) const

noexcept

Returns the current index of the selected item.

getCurrentChoiceName()

String AudioParameterChoice::getCurrentChoiceName ( ) const

noexcept

Returns the name of the currently selected item.

operator String()

AudioParameterChoice::operator String ( ) const

noexcept

Returns the name of the currently selected item.

operator=()

AudioParameterChoice& AudioParameterChoice::operator=

(

int

newValue

)

Changes the selected item to a new index.

getNormalisableRange()

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

overridevirtual

Returns the range of values that the parameter can take.

Implements RangedAudioParameter.

valueChanged()

virtual void AudioParameterChoice::valueChanged ( int  newValue )

protectedvirtual

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

Member Data Documentation

choices

const StringArray AudioParameterChoice::choices

Provides access to the list of choices that this parameter is working with.

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

• juce_AudioParameterChoice.h