juce_RangedAudioParameter.h

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 /*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited
 
   JUCE is an open source library subject to commercial or open-source
   licensing.
 
   By using JUCE, you agree to the terms of both the JUCE 7 End-User License
   Agreement and JUCE Privacy Policy.
 
   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-privacy-policy
 
   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).
 
   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.
 
  ==============================================================================
*/
 
namespace juce
{
 
template <typename Derived, typename Value>
class RangedAudioParameterAttributes
{
    using This = RangedAudioParameterAttributes;
 
public:
    using Category = AudioProcessorParameter::Category;
 
    using StringFromValue = std::function<String (Value, int)>;
    using ValueFromString = std::function<Value (const String&)>;
 
    [[nodiscard]] auto withStringFromValueFunction (StringFromValue x)                       const { return withMember (asDerived(), &Derived::stringFromValue, std::move (x)); }
 
    [[nodiscard]] auto withValueFromStringFunction (ValueFromString x)                       const { return withMember (asDerived(), &Derived::valueFromString, std::move (x)); }
 
    [[nodiscard]] auto withLabel (String x)                                                  const { return withMember (asDerived(), &Derived::attributes, attributes.withLabel (std::move (x))); }
 
    [[nodiscard]] auto withCategory (Category x)                                             const { return withMember (asDerived(), &Derived::attributes, attributes.withCategory (std::move (x))); }
 
    [[nodiscard]] auto withMeta (bool x)                                                     const { return withMember (asDerived(), &Derived::attributes, attributes.withMeta (std::move (x))); }
 
    [[nodiscard]] auto withAutomatable (bool x)                                              const { return withMember (asDerived(), &Derived::attributes, attributes.withAutomatable (std::move (x))); }
 
    [[nodiscard]] auto withInverted (bool x)                                                 const { return withMember (asDerived(), &Derived::attributes, attributes.withInverted (std::move (x))); }
 
    [[nodiscard]] const auto& getStringFromValueFunction()                                   const { return stringFromValue; }
 
    [[nodiscard]] const auto& getValueFromStringFunction()                                   const { return valueFromString; }
 
    [[nodiscard]] const auto& getAudioProcessorParameterWithIDAttributes()                   const { return attributes; }
 
private:
    auto& asDerived() const { return *static_cast<const Derived*> (this); }
 
    AudioProcessorParameterWithIDAttributes attributes;
    StringFromValue stringFromValue;
    ValueFromString valueFromString;
};
 
//==============================================================================
class JUCE_API RangedAudioParameter   : public AudioProcessorParameterWithID
{
public:
    using AudioProcessorParameterWithID::AudioProcessorParameterWithID;
 
    virtual const NormalisableRange<float>& getNormalisableRange() const = 0;
 
    int getNumSteps() const override;
 
    float convertTo0to1 (float v) const noexcept;
 
    float convertFrom0to1 (float v) const noexcept;
};
 
} // namespace juce