#include <SPI.h>
#include <XPT2046_Touchscreen.h>
#include <Adafruit_ILI9341.h>

#define TOUCH_CS_PIN       D1
#define TOUCH_IRQ_PIN      D2

#define TFT_CS   D8 
#define TFT_DC   D3
#define TFT_RST  D4

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

#define TrefX 400
#define TrefY 300

int touchX,touchY ,Mysize = 1,MyR,MyG,MyB;

uint16_t selectColor = ILI9341_BLACK; 

XPT2046_Touchscreen touch( TOUCH_CS_PIN, TOUCH_IRQ_PIN );
  
void setup() {
  Serial.begin( 115200 );
  touch.begin();
  Serial.println( "Touch screen ready." );
  tft.begin();
  tft.setRotation(2);
  tft.fillScreen(ILI9341_WHITE);
  seting();
}

TS_Point rawLocation;

void loop() {
while ( touch.touched() )
    {
    rawLocation = touch.getPoint();
    touchX = (rawLocation.x - TrefX) / (3790 / 320);
    touchY = 240 - (rawLocation.y - TrefY) / (3640 / 240);
    Serial.print("x = ");
    Serial.print(touchX);
    Serial.print(", y = ");
    Serial.println(touchY);
    if(touchX <= 60)
        {
             if(touchY >= 0 && touchY < 30 && touchX <= 30 && touchX >= 0)  MyR++;
        else if(touchY >= 30 && touchY < 60 && touchX <= 30 && touchX >= 0) MyG++; 
        else if(touchY >= 60 && touchY < 90 && touchX <= 30 && touchX >= 0) MyB++; 
        else if(touchY >= 0 && touchY < 30 && touchX <= 60 && touchX >= 30)  MyR--;
        else if(touchY >= 30 && touchY < 60 && touchX <= 60 && touchX >= 30) MyG--; 
        else if(touchY >= 60 && touchY < 90 && touchX <= 60 && touchX >= 30) MyB--; 
        else if(touchY >= 90 && touchY < 120) {MyR = 0;MyG = 0;MyB = 0;}
        else if(touchY >= 130 && touchY < 160) Mysize++;
        else if(touchY >= 160 && touchY < 190) Mysize--;
        selectColor = tft.color565(MyR ,MyG ,MyB); 
        if(Mysize > 10) Mysize = 10;
        if(Mysize < 0) Mysize = 0;
        if(MyR > 255) MyR = 255;
        if(MyG > 255) MyG = 255;
        if(MyB > 255) MyB = 255;
        if(MyR < 0) MyR = 0;
        if(MyG < 0) MyG = 0;
        if(MyB < 0) MyB = 0;
        seting(); 
        }
    else tft.fillRect(touchY-Mysize, touchX-Mysize,Mysize * 2, Mysize * 2, selectColor); 
    }
delay(100);
}
void seting()
{
tft.setCursor(130, 20);
tft.setTextSize(4);
tft.setTextColor(selectColor);
tft.fillRect(120, 0 ,120 , 60, ILI9341_WHITE);
tft.fillRect(210 - Mysize, 30 - Mysize , Mysize * 2, Mysize * 2, selectColor);
tft.print("+");
tft.setCursor(160, 20);
tft.print("-");
tft.fillRect(0,  0,30, 60, ILI9341_RED);
tft.fillRect(30, 0,30, 60, ILI9341_GREEN);
tft.fillRect(60, 0,30, 60, ILI9341_BLUE);
tft.fillRect(90, 0,30, 60, ILI9341_BLACK);  
}