Abstract/MIDIRotaryEncoder.hpp

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#pragma once
 
#if not defined(Encoder_h_) && not defined(IDE)
#error                                                                         \
    "The PJRC Encoder library should be included before the Control-Surface "  \
    "library. (#include <Encoder.h>)"
#endif
 
#include <Def/Def.hpp>
#include <Encoder.h>
#include <MIDI_Outputs/Abstract/MIDIOutputElement.hpp>
 
BEGIN_CS_NAMESPACE
 
template <class Sender>
class MIDIRotaryEncoder : public MIDIOutputElement {
  protected:
    MIDIRotaryEncoder(const EncoderPinList &pins,
                      const MIDICNChannelAddress &address,
                      int8_t speedMultiply, uint8_t pulsesPerStep,
                      const Sender &sender)
        : encoder{pins.A, pins.B}, address(address),
          speedMultiply(speedMultiply),
          pulsesPerStep(pulsesPerStep), sender(sender) {}
 
// For tests only
#ifndef ARDUINO
    MIDIRotaryEncoder(const Encoder &encoder,
                      const MIDICNChannelAddress &address,
                      int8_t speedMultiply, uint8_t pulsesPerStep,
                      const Sender &sender)
        : encoder{encoder}, address(address), speedMultiply(speedMultiply),
          pulsesPerStep(pulsesPerStep), sender(sender) {}
#endif
 
  public:
    void begin() final override {}
    void update() final override {
        long currentPosition = encoder.read();
        long difference = (currentPosition - previousPosition) / pulsesPerStep;
        if (difference) {
            sender.send(difference * speedMultiply, address);
            previousPosition += difference * pulsesPerStep;
        }
    }
 
  private:
    Encoder encoder;
    const MIDICNChannelAddress address;
    const int8_t speedMultiply;
    const uint8_t pulsesPerStep;
    long previousPosition = 0;
 
  public:
    Sender sender;
};
 
END_CS_NAMESPACE