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109 lines
4.5 KiB
C++
109 lines
4.5 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE 6 technical preview.
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Copyright (c) 2020 - Raw Material Software Limited
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You may use this code under the terms of the GPL v3
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(see www.gnu.org/licenses).
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For this technical preview, this file is not subject to commercial licensing.
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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/**
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A subclass of AudioProcessorParameter that provides an easy way to create a
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parameter which maps onto a given NormalisableRange.
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@see AudioParameterInt, AudioParameterBool, AudioParameterChoice
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@tags{Audio}
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*/
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class JUCE_API AudioParameterFloat : public RangedAudioParameter
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{
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public:
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/** Creates a AudioParameterFloat with the specified parameters.
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@param parameterID The parameter ID to use
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@param parameterName The parameter name to use
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@param normalisableRange The NormalisableRange to use
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@param defaultValue The non-normalised default value
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@param parameterLabel An optional label for the parameter's value
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@param parameterCategory An optional parameter category
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@param stringFromValue An optional lambda function that converts a non-normalised
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value to a string with a maximum length. This may
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be used by hosts to display the parameter's value.
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@param valueFromString An optional lambda function that parses a string and
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converts it into a non-normalised value. Some hosts use
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this to allow users to type in parameter values.
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*/
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AudioParameterFloat (const String& parameterID,
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const String& parameterName,
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NormalisableRange<float> normalisableRange,
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float defaultValue,
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const String& parameterLabel = String(),
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Category parameterCategory = AudioProcessorParameter::genericParameter,
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std::function<String (float value, int maximumStringLength)> stringFromValue = nullptr,
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std::function<float (const String& text)> valueFromString = nullptr);
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/** Creates a AudioParameterFloat with an ID, name, and range.
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On creation, its value is set to the default value.
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For control over skew factors, you can use the other
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constructor and provide a NormalisableRange.
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*/
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AudioParameterFloat (String parameterID,
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String parameterName,
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float minValue,
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float maxValue,
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float defaultValue);
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/** Destructor. */
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~AudioParameterFloat() override;
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/** Returns the parameter's current value. */
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float get() const noexcept { return value; }
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/** Returns the parameter's current value. */
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operator float() const noexcept { return value; }
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/** Changes the parameter's current value. */
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AudioParameterFloat& operator= (float newValue);
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/** Returns the range of values that the parameter can take. */
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const NormalisableRange<float>& getNormalisableRange() const override { return range; }
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/** Provides access to the parameter's range. */
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NormalisableRange<float> range;
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protected:
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/** Override this method if you are interested in receiving callbacks
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when the parameter value changes.
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*/
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virtual void valueChanged (float newValue);
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private:
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//==============================================================================
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float getValue() const override;
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void setValue (float newValue) override;
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float getDefaultValue() const override;
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int getNumSteps() const override;
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String getText (float, int) const override;
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float getValueForText (const String&) const override;
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std::atomic<float> value;
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const float defaultValue;
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std::function<String (float, int)> stringFromValueFunction;
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std::function<float (const String&)> valueFromStringFunction;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AudioParameterFloat)
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};
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} // namespace juce
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