MeshCore/src/helpers/ui/DisplayDriver.h

#pragma once

#include <stdint.h>

class DisplayDriver {
  int _w, _h;
protected:
  DisplayDriver(int w, int h) { _w = w; _h = h; }
public:
  enum Color { DARK=0, LIGHT, RED, GREEN, BLUE, YELLOW, ORANGE }; // on b/w screen, colors will be !=0 synonym of light

  int width() const { return _w; }
  int height() const { return _h; }

  virtual bool isOn() = 0;
  virtual void turnOn() = 0;
  virtual void turnOff() = 0;
  virtual void clear() = 0;
  virtual void startFrame(Color bkg = DARK) = 0;
  virtual void setTextSize(int sz) = 0;
  virtual void setColor(Color c) = 0;
  virtual void setCursor(int x, int y) = 0;
  virtual void print(const char* str) = 0;
  virtual void printWordWrap(const char* str, int max_width) { print(str); }   // fallback to basic print() if no override
  virtual void fillRect(int x, int y, int w, int h) = 0;
  virtual void drawRect(int x, int y, int w, int h) = 0;
  virtual void drawXbm(int x, int y, const uint8_t* bits, int w, int h) = 0;
  virtual uint16_t getTextWidth(const char* str) = 0;
  virtual void drawTextCentered(int mid_x, int y, const char* str) {   // helper method (override to optimise)
    int w = getTextWidth(str);
    setCursor(mid_x - w/2, y);
    print(str);
  }
  virtual void endFrame() = 0;
};