/*
 * MIT License
 * Author: Mark Allyn
 *
 * knob_panel.h — Thread 3 stub: future hardware encoder panel.
 *
 * When physical encoders are installed, KnobPanel will read them via
 * GPIO/serial and write to SharedRenderState under Mutex A.  Until
 * then, the thread starts but idles immediately without touching
 * SharedRenderState.  The keyboard equivalents in PPIScope handle
 * the same state fields in the meantime.
 */

#pragma once
#include <thread>
#include <atomic>
#include "shared_render_state.h"

class KnobPanel {
public:
    explicit KnobPanel(SharedRenderState& srs) : srs_(srs) {}

    void start();
    void stop();

private:
    void run();

    SharedRenderState& srs_;
    std::thread        thread_;
    std::atomic<bool>  running_{false};
};