/*
  Forum: https://forum.arduino.cc/t/adafruit-320x240-mit-teensy-4-0-flickering/1350338
  Wokwi: https://wokwi.com/projects/422059759297301505

  ec2021

  Draw Bars/Pointers with minimum erasure effort

  Classes with Template

*/
#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"
#include "TemplateGraphicClass.h"
#define TFT_DC 9
#define TFT_CS 10
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

constexpr float Radius = 100.0;
unsigned long lastTime = 0;
int Angle = 180;
int AngleDx = 10;
int value = 1;
int delta = 1;

PointerClass<Adafruit_ILI9341> pointerA(tft), pointerB(tft), pointerC(tft), pointerD(tft);
BarClass<Adafruit_ILI9341> barA(tft), barB(tft), barC(tft), barD(tft);

void setup() {
  Serial.begin(115200);
  Serial.println("Graphics Example");
  tft.begin();
  pointerA.setXYR(120, 160, 80);
  pointerB.setXYR(120, 160, 60);
  pointerC.setXYR(120, 160, 50);
  pointerD.setXYR(120, 160, 40);
  pointerA.setBackColor(ILI9341_BLACK);
  barA.setXYWD(200,  20, 40, 0);
  barA.setBackColor(ILI9341_GREEN);
  barB.setXYWD( 40, 260, 30, 1);
  barC.setXYWD( 20, 120, 20, 2);
  barD.setXYWD(160, 300, 10, 3);
  clearScreen();
}


void loop(void) {
  if (millis() - lastTime > 100) {
    lastTime = millis();
    handlePointers();
    handleBars();
  }
}

void clearScreen() {
  tft.fillScreen(ILI9341_BLACK);
}

void handlePointers() {
  pointerA.draw(Angle, ILI9341_YELLOW);
  pointerB.draw(90 - Angle, ILI9341_GREEN);
  pointerC.draw(Angle + 45, ILI9341_YELLOW);
  pointerD.draw(180 - Angle, ILI9341_GREEN);
  Angle += AngleDx;
  if ((Angle < 0) || (Angle > 180)) {
    AngleDx = -AngleDx;
  }
}

void handleBars() {
  barA.draw(value * 10, ILI9341_MAGENTA);
  barB.draw(value * 10, ILI9341_RED);
  barC.draw(value * 10, ILI9341_BLUE);
  barD.draw(value * 10, ILI9341_GREEN);
  value += delta;
  if (value > 10 || value < 2) {
    delta = -delta;
  }
}