#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>

// DEFINIRANJE NA BOITE 
#define BLACK    0x0000
#define BLUE     0x001F
#define RED      0xF800
#define GREEN    0x07E0
#define CYAN     0x07FF
#define MAGENTA  0xF81F
#define YELLOW   0xFFE0
#define WHITE    0xFFFF

int matrixW = 8;       //dolzina na matrica 
int matrixH = 8;       //sirina na matrica 
#define PIN 6 //        //pino na koj sme povrzani 

Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(matrixW, matrixH, PIN,
                            NEO_MATRIX_TOP     + NEO_MATRIX_LEFT +
                            NEO_MATRIX_ROWS + NEO_MATRIX_PROGRESSIVE,
                            NEO_GRB            + NEO_KHZ800);

uint16_t textColor = matrix.Color(255, 0, 0); // boja na matricata 
const uint16_t drawingColors[] = { GREEN, BLUE, CYAN, WHITE, RED};
            // 3 boi za pravoagolnicite 

#define arr_len( x )  ( sizeof( x ) / sizeof( *x ) ) 

int pixelPerChar = 6; // Width of Standard Font Characters is 8X6 Pixels
int x = matrix.width(); // dolzina na display 
int pass = 0; // Counter
int i = 0; // Counter

int sensor=A0;

float V;
float Vread;

void setup() {
  matrix.begin();
  matrix.setTextWrap(false);
  matrix.setBrightness(255);       //postavuvanje na osvetlenost 
  matrix.setTextColor(textColor);    // boja na textot 

  pinMode(sensor, INPUT);
}

void loop() {

  Vread=analogRead(sensor);

  V=(5.0/1023.0)*Vread;

  String vrednost = "vrednosta e :" + String (V,1);     //konvertiranje vo CHAR vrednost 

  writeText(vrednost);          //pretstavuvanje na vrednosta


}

/* --------------------  funkcija za pisuvanje text --------------------  */
void writeText(String msg) {
  int msgSize = (msg.length() * pixelPerChar) + (2 * pixelPerChar); // Calculate message length
  int scrollingMax = (msgSize) + matrix.width(); // Adjust displacement for message length

  x = matrix.width(); // Reset cursor position and start text string at new position on the far right

  while (true) {
    matrix.setTextColor(textColor); // Set the text color

    matrix.fillScreen(0); // Blank the entire screen
    matrix.setCursor(x, 0); // Set starting point for text string
    matrix.print(msg); // Set the message string

    // Scroll text from right to left by moving the cursor position
    if (--x < -scrollingMax) {
      // Adjust for message length
      // Decrement x by one and compare new value of x to -scrollingMax;
      // This animates (moves) the text by one pixel to the left

      x = matrix.width(); // After scrolling by scrollingMax pixels, reset cursor position and start string at new position on the far right
      break; // Exit the loop after one complete scroll
    }
    matrix.show(); // Display the text/image
    delay(200); // Speed of scrolling or frame rate
  }
}