#include <mechButton.h>

int         current_Num;
mechButton  aBtn(3);  // Handles debouncing the button and can do a callback when changed.


void setup() {
  // put your setup code here, to run once:
  pinMode(2, OUTPUT);

  // number output A~G
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);

  pinMode(13, OUTPUT);
  aBtn.setCallback(btnChg);
  current_Num = 0;
  callNum(current_Num);
}


// This is called when the button changes state. And don't worry,
// it's already been debounced.
void btnChg(void) {

  if (!aBtn.getState()) {     // Button bee clicked on..
    current_Num++;            // Bump up value;
    if (current_Num>9) {      // Went over?
      current_Num = 0;        // Circle around.
    }                         //
    callNum(current_Num);     // Show the new number.
  }
}


void loop() { idle(); } // Runs the magic.
  

void callNum(int num) {
  clear();
  switch(num) {
    case 0:
      digitalWrite(4, LOW);
      digitalWrite(5, LOW);
      digitalWrite(6, LOW);
      digitalWrite(7, LOW);
      digitalWrite(8, LOW);
      digitalWrite(9, LOW);
      break;
    case 1:
      digitalWrite(5, LOW);
      digitalWrite(6, LOW);
      break;
    case 2:
      digitalWrite(4, LOW);
      digitalWrite(5, LOW);
      digitalWrite(10, LOW);
      digitalWrite(7, LOW);
      digitalWrite(8, LOW);
      break;
    case 3:
      digitalWrite(4, LOW);
      digitalWrite(5, LOW);
      digitalWrite(6, LOW);
      digitalWrite(7, LOW);
      digitalWrite(10, LOW);
      break;
    case 4:
      digitalWrite(10, LOW);
      digitalWrite(5, LOW);
      digitalWrite(6, LOW);
      digitalWrite(9, LOW);
      break;
    case 5:
      digitalWrite(4, LOW);
      digitalWrite(9, LOW);
      digitalWrite(10, LOW);
      digitalWrite(6, LOW);
      digitalWrite(7, LOW);
      break;
    case 6:
      digitalWrite(4, LOW);
      digitalWrite(9, LOW);
      digitalWrite(8, LOW);
      digitalWrite(7, LOW);
      digitalWrite(6, LOW);
      digitalWrite(10, LOW);
      break;
    case 7:
      digitalWrite(4, LOW);
      digitalWrite(5, LOW);
      digitalWrite(6, LOW);
      break;
    case 8:
      digitalWrite(4, LOW);
      digitalWrite(5, LOW);
      digitalWrite(6, LOW);
      digitalWrite(7, LOW);
      digitalWrite(8, LOW);
      digitalWrite(9, LOW);
      digitalWrite(10, LOW);
      break;
    case 9:
      digitalWrite(4, LOW);
      digitalWrite(5, LOW);
      digitalWrite(6, LOW);
      digitalWrite(7, LOW);
      digitalWrite(9, LOW);
      digitalWrite(10, LOW);
      break;
  }
}

void clear(){
  digitalWrite(4, HIGH);
  digitalWrite(5, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(7, HIGH);
  digitalWrite(8, HIGH);
  digitalWrite(9, HIGH);
  digitalWrite(10, HIGH);
}