// jakemakes.eu

#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_TFTLCD.h> // Hardware-specific library
#include <TouchScreen.h>

#define YP A3  // must be an analog pin, use "An" notation!
#define XM A2  // must be an analog pin, use "An" notation!
#define YM 9   // can be a digital pin
#define XP 8   // can be a digital pin

#define TS_MINX 150
#define TS_MINY 120
#define TS_MAXX 920
#define TS_MAXY 940

// For better pressure precision, we need to know the resistance
// between X+ and X- Use any multimeter to read it
// For the one we're using, its 300 ohms across the X plate in our case A2 and digital pin 8
TouchScreen ts = TouchScreen(XP, YP, XM, YM, 310);

#define LCD_CS A3
#define LCD_CD A2
#define LCD_WR A1
#define LCD_RD A0
// optional
#define LCD_RESET A4

// Assign human-readable names to some common 16-bit color values:
#define BLACK   0x0000
#define BLUE    0x001F
#define RED     0xF800
#define GREEN   0x07E0
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xFFE0
#define WHITE   0xFFFF

Adafruit_TFTLCD tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);

#define BOXSIZE 40
#define PENRADIUS 3
int oldcolor, currentcolor;

#define MINPRESSURE 10
#define MAXPRESSURE 1000
int xplace = 0;

void setup() {
  Serial.begin(9600);
  Serial.println("Paint!");
  
  tft.reset();

  uint16_t identifier = tft.readID();
 if(identifier==0x0101)
      identifier=0x9341;
  if(identifier == 0x9325) {
    Serial.println(F("Found ILI9325 LCD driver"));
  } else if(identifier == 0x9328) {
    Serial.println(F("Found ILI9328 LCD driver"));
  } else if(identifier == 0x4535) {
    Serial.println(F("Found LGDP4535 LCD driver"));
  }else if(identifier == 0x7575) {
    Serial.println(F("Found HX8347G LCD driver"));
  } else if(identifier == 0x9341) {
    Serial.println(F("Found ILI9341 LCD driver"));
  } else if(identifier == 0x8357) {
    Serial.println(F("Found HX8357D LCD driver"));
  } else {
    Serial.print(F("Unknown LCD driver chip: "));
    Serial.println(identifier, HEX);
    Serial.println(F("If using the Adafruit 2.8\" TFT Arduino shield, the line:"));
    Serial.println(F("  #define USE_ADAFRUIT_SHIELD_PINOUT"));
    Serial.println(F("should appear in the library header (Adafruit_TFT.h)."));
    Serial.println(F("If using the breakout board, it should NOT be #defined!"));
    Serial.println(F("Also if using the breakout, double-check that all wiring"));
    Serial.println(F("matches the tutorial."));
    return;
  }

  tft.begin(identifier);

  tft.fillScreen(BLACK);
  
  pinMode(13, OUTPUT);

}


void loop() {
  
  // Get touch point.
  TSPoint p = ts.getPoint();
  
  // if sharing pins, you'll need to fix the directions of the touchscreen pins
  //pinMode(XP, OUTPUT);
  pinMode(XM, OUTPUT);
  pinMode(YP, OUTPUT);
  //pinMode(YM, OUTPUT);

  // we have some minimum pressure we consider 'valid'
  // pressure of 0 means no pressing!

  if (p.z > MINPRESSURE && p.z < MAXPRESSURE) {
    
    Serial.print("X = "); Serial.print(p.x);
    Serial.print("\tY = "); Serial.print(p.y);
    Serial.print("\tPressure = "); Serial.println(p.z);

    // scale from 0->1023 to tft.width
    p.x = map(p.x, TS_MINX, TS_MAXX, tft.width(), 0);
    p.y = map(p.y, TS_MINY, TS_MAXY, tft.height(), 0);

    Serial.print("("); Serial.print(p.x);
    Serial.print(", "); Serial.print(p.y);
    Serial.println(")");
  }

  //small loop that creates two moving boxes
  //and erases the trace boxes leave.
  
  tft.fillRect(xplace, 0, 1, BOXSIZE, BLACK);
  tft.fillRect(0, xplace, BOXSIZE, 1, BLACK);
  xplace += 1;

  tft.fillRect(xplace, 0, BOXSIZE, BOXSIZE, YELLOW);
  tft.fillRect(0, xplace, BOXSIZE, BOXSIZE, YELLOW);

  if (xplace > 320){
    xplace = 0;
  }


  // Sets Cursor and print hello world
  tft.setCursor(50,50);
  tft.setTextColor(WHITE);
  tft.setTextSize(2);  
  tft.println("Hello World");


  // Create black rectangle to clear the previous millis() text and print new
  tft.setCursor(60,100);
  tft.fillRect(60, 100, 90, 30, BLACK);
  tft.println(millis());

  // Print last touch position x y
  if (p.z > MINPRESSURE && p.z < MAXPRESSURE) {
    tft.fillScreen(BLACK);
    tft.setCursor(65,150);
    tft.setTextColor(GREEN);
    tft.setTextSize(1);
    tft.print(p.x);
    tft.print("  ");
    tft.println(p.y);
    
  }

  // Lets draw some small lines.
  tft.drawFastVLine(200,200,20, RED);
  tft.drawFastHLine(210,200,20, GREEN);


  // Some shapes
  tft.drawRect(150, 210, 25, 39, BLUE);
  tft.fillCircle(110, 210, 5, CYAN);
  tft.drawTriangle(70,210,70,220,80,215, MAGENTA);

  
  delay(3);

 

}