//// 080216b cr by rha on thales2 with P 0135 beta
//// follow R&F handbook p. 212, mouse buttons

// get some variables (dimensions of our angle)
int h = 30; // button height
int w = 40; // button width
int xc = 200; // x of center of button
int yc = 150; // y of center
int xmin = xc - w/2; // left edge of button
int xmax = xc + w/2; // right edge
int ymin = yc - h/2; // top edge
int ymax = yc + w/2; // bottom

// setup the canvas
void setup(){
  size(400, 300); // do not want to change this later
  background(0); // black is nice for a movie/}
  frameRate(10); // slow
  // noLoop(); // sometimes useful
  // print("starting");
}

// draw something
void draw(){
  background(0);
  drawB(); // draw my button
}

boolean hot(int x, int y) {
  boolean temp = false;
  if (( x > xmin ) && ( x < xmax ) && ( y > ymin) && ( y < ymax )) {
    temp = true;
  }
  return temp;
}

// here is the button code
void drawB() {
  if (( mousePressed == true ) && ( hot(mouseX, mouseY) == true)) {
    fill(255, 0, 0); // red
  } else {
    background(128); // gray
    fill(0, 255, 0); // green
  }
  noStroke();
  rect(200 - w/2, 150 - h/2, w, h); // our button
}

//// end