import papaya.*;

Study aStudy;

PFont myfont, myboldfont;
PImage smallleft, smallup, smalldown, smallright;

int page=1;
float value;

float[] graphdata;
PGraphics pg;
int gwidth=160, gheight=80;
JakeButton leftarrow, rightarrow;

void setup() {
  size(700, 500);
  smooth();
  loadData();

  aStudy = new Study();

  graphdata = new float[101];
  for (int i = 0; i < 101; i++) {
    float x = -3.0 + 0.06*i;
    graphdata[i] = exp(-x*x/2)/sqrt(2*PI);
  }
  pg = createGraphics(gwidth, gheight, P2D);

  PImage[] lefts = {loadImage("leftblue.jpg"), loadImage("leftpurple.jpg")};
  leftarrow = new JakeButton(30,415,lefts[1],lefts[0],lefts[0]);

  PImage[] rights = {loadImage("rightblue.jpg"), loadImage("rightpurple.jpg")};
  rightarrow = new JakeButton(615,415,rights[1],rights[0],rights[0]);
}

void draw() {
  background(255);
  fill(0);

  String t = "For a z test statistics value of " + nf(aStudy.testvalue, 1, 4) + ", find the " + aStudy.tail + " p-value.";
  drawStrings(t, 30, 44, 25);

  switch(page) 
  {
  case 1:
    page1();
    break;
  case 2:
    page2();
    break;
  }
  
  leftarrow.updateButton();
  leftarrow.drawButton();
  
  if(leftarrow.clicked) page--;
  
  rightarrow.updateButton();
  rightarrow.drawButton();
  
  if (rightarrow.clicked)
  {
    page++;
    if (page>2) 
    {
     page = 1;
     aStudy = new Study();
   }
  }
}