/*
 An example showing rainbow colours on a 1.8" TFT LCD screen
 and to show a basic example of font use.
 
 This examples uses the hardware SPI only. Non-hardware SPI
 is just too slow (~8 times slower!)
 
 Updated by Bodmer
 
 Colours:
 
 code	color
 0x0000	Black
 0xFFFF	White
 0xBDF7	Light Gray
 0x7BEF	Dark Gray
 0xF800	Red
 0xFFE0	Yellow
 0xFBE0	Orange
 0x79E0	Brown
 0x7E0	Green
 0x7FF	Cyan
 0x1F	Blue
 0xF81F	Pink
 
 */

#include <TFT_eSPI.h> // Graphics and font library for ST7735 driver chip
#include <SPI.h>

TFT_eSPI tft = TFT_eSPI();  // Invoke library, pins defined in User_Setup.h

unsigned long targetTime = 0;
byte red = 31;
byte green = 0;
byte blue = 0;
byte state = 0;
unsigned int colour = red << 11;

void setup(void) {
  tft.init();
  tft.setRotation(1);
  tft.fillScreen(ST7735_BLACK);

  targetTime = millis() + 1000; 
}

void loop() {

  if (targetTime < millis()) {
    targetTime = millis()+10000;
    for (int i = 0; i<160; i++) {
      tft.drawFastVLine(i, 0, tft.height(), colour);
      switch (state) {
      case 0: 
        green +=2;
        if (green == 64) {
          green=63; 
          state = 1;
        }
        break;
      case 1: 
        red--;
        if (red == 255) {
          red = 0;
          state = 2; 
        }
        break;
      case 2: 
        blue ++;
        if (blue == 32) {
          blue=31; 
          state = 3; 
        }
        break;
      case 3: 
        green -=2;
        if (green ==255) {
          green=0; 
          state = 4; 
        }
        break;
      case 4: 
        red ++;
        if (red == 32) {
          red = 31; 
          state = 5; 
        }
        break;
      case 5: 
        blue --;
        if (blue == 255) {
          blue = 0; 
          state = 0; 
        }
        break;
      }
      colour = red<<11 | green<<5 | blue;
    }
    
    // The standard ADAFruit font still works as berfore
    tft.setTextColor(ST7735_BLACK, ST7735_BLACK); // Note these fonts do not plot the background colour
    tft.setCursor (12, 5);
    tft.print("Original ADAfruit font!");
    
    // The new larger fonts do not use the .setCursor call, coords are embedded
    tft.setTextColor(ST7735_BLACK, ST7735_BLACK); // Do not plot the background colour
    // Overlay the black text on top of the rainbow plot (the advantage of not drawing the backgorund colour!)
    tft.drawCentreString("Font size 2",80,14,2); // Draw text centre at position 80, 12 using font 2
    //tft.drawCentreString("Font size 2",81,12,2); // Draw text centre at position 80, 12 using font 2
    tft.drawCentreString("Font size 4",80,30,4); // Draw text centre at position 80, 24 using font 4
    tft.drawCentreString("12.34",80,54,6); // Draw text centre at position 80, 24 using font 6
    tft.drawCentreString("12.34 is in font size 6",80,92,2); // Draw text centre at position 80, 90 using font 2
    // Note the x position is the top of the font!
    
    // draw a floating point number
    float pi = 3.14159; // Value to print
    int precision = 3;  // Number of digits after decimal point
    int xpos = 50;      // x position
    int ypos = 110;     // y position
    int font = 2;       // font number only 2,4,6,7 valid. Font 6 only contains characters [space] 0 1 2 3 4 5 6 7 8 9 0 : a p m
    xpos+=tft.drawFloat(pi,precision,xpos,ypos,font); // Draw rounded number and return new xpos delta for next print position
    tft.drawString(" is pi",xpos,ypos,font); // Continue printing from new x position
  }
}