/*
javaButtonExample
Nathan Rowbottom
Apr 15 2018
An example of a button

TODO:
1 Add comments
2 Move the button detection into a boolean function
3 Make the button do something else on hover or on clicking
4 In another sketch, make your own two buttons that does something (increases/decreases the shade of the background?)
*/


//Global variables
PVector mouse;
PVector buttonPos, buttonSize;

color activeCol = color(200,200,50);//yellow
color inactiveCol = color(255);//white

void setup(){
  size(800, 600);
  strokeWeight(4);
  rectMode(CENTER);
  textAlign(CENTER, CENTER);
  textSize(10);
  init();
}

//used to set up anything that needs to be set up
void init(){
  mouse = new PVector();
  buttonPos = new PVector(width/2, height/2);
  buttonSize = new PVector(80, 30);
}

//the draw function
void draw(){
  background(50);

  //update stuff
  mouse.set(mouseX, mouseY);

  //check stuff
  //is the mouse over the button?
  if (abs(mouse.x - buttonPos.x) < buttonSize.x/2 && abs(mouse.y - buttonPos.y) < buttonSize.y/2){
      fill(activeCol);
      text("mouse over", width/2, 500);
      //is the mouse button pressed?
      if (mousePressed){
         text("button clicked!", width/2, 100);
      }
  }
  else{
    fill(inactiveCol);
  }

  //draw stuff
  rect(buttonPos.x, buttonPos.y, buttonSize.x, buttonSize.y);
}