#include <iostream>
#include "vgl.h"
#include "Lines.h"

extern Lines starburst_G;
extern float theta_G;
extern void MakeWheel();
using namespace std;


void SpecialKeypress(int key, int x, int y) {
   return;
}

void KeyUp(unsigned char key, int x, int y) {
   return;
}

void SpecialUp(int key, int x, int y) {
   return;
}

bool DoAnimation = false;
int  delay = 1000/60;

void Animate(int value) {
   theta_G += 0.5;
   if(DoAnimation) {
       glutTimerFunc(delay, Animate,0);
   }
   glutPostRedisplay();
   return;
}

void StartAnimation() {
   glutTimerFunc(delay, Animate,0);
   DoAnimation = true;
   return;
}

void StopAnimation() {
   DoAnimation = false;;
   return;
}

void KeyHelp() {
    cout << endl;
    cout << "Keys " << endl;
    cout << "\ta\tStart Animation" << endl;
    cout << "\tA\tStop Animation" << endl;
    cout << "\tw\tAdd a wheel" << endl;
    cout << "\tq,Q\tQuit" << endl;
    cout << "\th,?\tHelp" << endl;
    cout << "\tr,R\tRedisplay" << endl;
    cout << endl;

    return;
}

void Keypress(unsigned char key, int x, int y) {
   static int state = 1;

   bool redisplay = false;
   switch (key) {

      case 'w':
          MakeWheel();
	  break;
      case 'a': 
          StartAnimation();
	  break;
      case 'A':
       	  StopAnimation();
	  break;
      case 'h': 
      case '?': KeyHelp();
                break;
      case 'Q': 
      case 'q': exit(0);

      case 'r':
      case 'R': redisplay = true;
                break;

      default:
      		cerr << "Unhandled keypress for key '" << key << "'" << endl;
   }

   if (redisplay) {
      glutPostRedisplay();
   }

   return;
}