class Button{

float bColor;
float xPos, yPos;
float bDiameter;
PFont bFont;
String bText;

 Button() {
  bColor = 100;
  xPos = width/2;
  yPos = height/2;
  bDiameter = 100;
  bFont = createFont("Times New Roman", bDiameter/1.75);
  bText = "_";
 }

 Button(float tColor, float txPos, float tyPos, float tDiameter) {
  bColor = tColor;
  xPos = txPos;
  yPos = tyPos;
  bDiameter = tDiameter;
  bFont = createFont("Times New Roman", bDiameter/1.75);
 }

 Button(float tColor, float txPos, float tyPos, float tDiameter, String tText) {
  bColor = tColor;
  xPos = txPos;
  yPos = tyPos;
  bDiameter = tDiameter;
  bFont = createFont("Times New Roman", bDiameter/1.75);
  bText = tText;
 }

 public void setColor(float tColor){
   this.bColor = tColor;
 }

 public void setXPos(float txPos){
  this.xPos = txPos;
 }

 public void setYPos(float tyPos){
  this.yPos = tyPos;
 }

 public void setDiameter(float tDiameter){
  this.bDiameter = tDiameter;
 }

 public void setText(String tText){
  this.bText = tText;
 }

 void display() {
 ellipse(xPos, yPos, bDiameter, bDiameter);
 fill(0);
 textFont(bFont);
 textAlign(CENTER);
 if ( bText != null && !bText.isEmpty() )
 text (bText, xPos, yPos + bDiameter/5);
 }


 void display(String tText) {
 bText = tText;
 ellipse(xPos, yPos, bDiameter, bDiameter);
 fill(0);
 textFont(bFont);
 textAlign(CENTER);
 text (bText, xPos, yPos + bDiameter/5);
 }

 void highlight(){
  if (overCircle() == true) {
    fill(bColor + 20);
  }
  else {
    fill(bColor);
  }
 }

boolean overCircle() {
  float disX = xPos - mouseX;
  float disY = yPos - mouseY;
  if (sqrt(sq(disX) + sq(disY)) < bDiameter/2 ) {
    return true;
  } else {
    return false;
  }
}

}

class ButtonRect {
float bColor;
float xPos, yPos;
float bLength, bWidth;
PFont bFont;
String bText;

 ButtonRect() {
  bColor = 100;
  xPos = width/2;
  yPos = height/2;
  bLength = 40;
  bWidth = 20;
  bFont = createFont("Times New Roman", bLength*bWidth/1.75);
 }

 ButtonRect(float tColor, float txPos, float tyPos, float tLength, float tWidth) {
  bColor = tColor;
  xPos = txPos;
  yPos = tyPos;
  bLength = tLength;
  bWidth = tWidth;
  bFont = createFont("Times New Roman", (bLength+bWidth/2)/1.75);
 }

 ButtonRect(float tColor, float txPos, float tyPos, float tLength, float tWidth, String tText) {
  bColor = tColor;
  xPos = txPos;
  yPos = tyPos;
  bLength = tLength;
  bWidth = tWidth;
  bText = tText;
  bFont = createFont("Times New Roman", (bLength+bWidth/2)/2.25);
 }

  public void setColor(float tColor){
   this.bColor = tColor;
 }

 public void setXPos(float txPos){
  this.xPos = txPos;
 }

 public void setYPos(float tyPos){
  this.yPos = tyPos;
 }

 public void setLength(float tLength){
  this.bLength = tLength;
 }

 public void setWidth(float tWidth){
  this.bWidth = tWidth;
 }

 public void setText(String tText){
  this.bText = tText;
 }

 void display() {
 rectMode(CENTER);
 rect(xPos, yPos, bLength, bWidth);
 fill(0);
 textFont(bFont);
 textAlign(CENTER);
 if ( bText != null && !bText.isEmpty() )
 text (bText, xPos, yPos + yPos/25);
 }

 void display(String tText) {
 bText = tText;
 rectMode(CENTER);
 rect(xPos, yPos, bLength, bWidth);
 fill(0);
 textFont(bFont);
 textAlign(CENTER);
 text (bText, xPos, yPos + yPos/2);
 }

 void highlight(){
  if (overRect() == true) {
    fill(bColor + 20);
  }
  else {
    fill(bColor);
  }
 }



boolean overRect() {
  if (mouseX >= xPos-bLength/2 && mouseX <= xPos+bLength/2 &&
      mouseY >= yPos-bWidth/2 && mouseY <= yPos+bWidth/2) {
    return true;
  } else {
    return false;
  }
// https://www.processing.org/examples/button.html
}


}


Button[] button;

class Question {

  Question(){
    button = new Button[5];
    for (int i = 0; i < 5; i++) {
     button[i] = new Button();
    }
    for (Button button : button) {
      button.setColor(192);
      button.setDiameter(30);
    }
    button[0].setText("1");
    button[0].setXPos(width*2/9);
    button[0].setYPos(height*2/9);

    button[1].setText("A");
    button[1].setXPos(width*3/9);
    button[1].setYPos(height*3.5/9);

    button[2].setText("B");
    button[2].setXPos(width*3/9);
    button[2].setYPos(height/2);

    button[3].setText("C");
    button[3].setXPos(width*3/9);
    button[3].setYPos(height*5.5/9);

    button[4].setText("D");
    button[4].setXPos(width*3/9);
    button[4].setYPos(height*6.5/9);

    for (Button button : button) {
      button.highlight();
      button.display();
    }

  }

}