// Adafruit_NeoMatrix example for single NeoPixel Shield.
// Scrolls 'Howdy' across the matrix in a portrait (vertical) orientation.

#include <Adafruit_GFX.h>
#include <FastLED.h>
#include <FastLED_NeoMatrix.h>

#define PIN 6

// MATRIX DECLARATION:
// Parameter 1 = width of NeoPixel matrix
// Parameter 2 = height of matrix
// Parameter 3 = pin number (most are valid)
// Parameter 4 = matrix layout flags, add together as needed:
//   NEO_MATRIX_TOP, NEO_MATRIX_BOTTOM, NEO_MATRIX_LEFT, NEO_MATRIX_RIGHT:
//     Position of the FIRST LED in the matrix; pick two, e.g.
//     NEO_MATRIX_TOP + NEO_MATRIX_LEFT for the top-left corner.
//   NEO_MATRIX_ROWS, NEO_MATRIX_COLUMNS: LEDs are arranged in horizontal
//     rows or in vertical columns, respectively; pick one or the other.
//   NEO_MATRIX_PROGRESSIVE, NEO_MATRIX_ZIGZAG: all rows/columns proceed
//     in the same order, or alternate lines reverse direction; pick one.
//   See example below for these values in action.
// Parameter 5 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)


// Example for NeoPixel Shield.  In this application we'd like to use it
// as a 5x8 tall matrix, with the USB port positioned at the top of the
// Arduino.  When held that way, the first pixel is at the top right, and
// lines are arranged in columns, progressive order.  The shield uses
// 800 KHz (v2) pixels that expect GRB color data.
#define mw 15
#define mh 7
#define NUMMATRIX (mw*mh)

CRGB matrixleds[NUMMATRIX];

FastLED_NeoMatrix *matrix = new FastLED_NeoMatrix(matrixleds, mw, mh, mw / 8, 1,
    NEO_MATRIX_TOP + NEO_MATRIX_LEFT +
    NEO_MATRIX_ROWS +  NEO_MATRIX_ZIGZAG);

const uint16_t colors[] = {
  matrix->Color(255, 0, 0), matrix->Color(0, 255, 0), matrix->Color(0, 0, 255)
};

void setup() {
  FastLED.addLeds<NEOPIXEL, PIN>(matrixleds, NUMMATRIX);
  matrix->begin();
  matrix->setTextWrap(false);
  matrix->setBrightness(255);
  matrix->setTextColor(colors[0]);
}

int x    = mw;
int pass = 0;

void loop() {
  matrix->fillScreen(0);
  matrix->setCursor(x, 0);
  matrix->print(F("ABCD"));
  if (--x < -36) {
    x = matrix->width();
    if (++pass >= 3) pass = 0;
    matrix->setTextColor(colors[pass]);
  }
  matrix->show();
  delay(100);
}