text: /*
   * MIT License
   *
   * Copyright (c) 2020 Alexey Edelev <semlanik@gmail.com>
   *
   * This file is part of eScooterControl project https://github.com/semlanik/eScooterControl
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy of this
   * software and associated documentation files (the "Software"), to deal in the Software
   * without restriction, including without limitation the rights to use, copy, modify,
   * merge, publish, distribute, sublicense, and/or sell copies of the Software, and
   * to permit persons to whom the Software is furnished to do so, subject to the following
   * conditions:
   *
   * The above copyright notice and this permission notice shall be included in all copies
   * or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
   * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
   * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
   * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
   * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   * DEALINGS IN THE SOFTWARE.
   */
  #pragma once
  
  #include "singleton.h"
  
  #include <LedControl.h>
  
  class Display : public Singleton<Display>
  {
  public:
    void updateDisplayBuffer();
  
    void setAcceleration(byte level) {
      updateValue(m_acceleration, level);
    }
  
    void setSpeed(byte speed) {
      updateValue(m_speed, speed);
    }
  
    void setBatteryLevel(byte level) {
      updateValue(m_battery, level);
    }
  
    void setStop(bool stop) {
      updateValue(m_stop, stop);
    }
  
    void setLightOn(bool lightOn) {
      updateValue(m_lightOn, lightOn);
    }
  
    void setEco(bool eco) {
      updateValue(m_eco, eco);
    }
  
    template<typename T>
    void updateValue(T &value, const T newValue) {
      if (value != newValue) {
        value = newValue;
        m_updateRequested = true;      
      }
    }
  
  private:
    Display();
    friend class Singleton;
  
    void drawAccelerationLevel();
    void drawSpeed();
    void drawBatteryLevel();
    void drawLampSign();
    void drawEcoSign();
    void drawStopSign();
  
    byte mDisplayBuffer[16];
    LedControl mLedControl;
    bool m_updateRequested;
  
    byte m_acceleration;
    byte m_battery;
    byte m_speed;
    bool m_stop;
    bool m_lightOn;
    bool m_eco;
  };
  