this.txt = txt;

  this.mouseIsOn = false;

​

  this.setPosition = function(x, y) {

    this.pos = createVector(x, y);

  };

​

  this.hover = function() {

    if (mouseX > this.pos.x && mouseX < this.pos.x + textWidth(txt) && mouseY > this.pos.y && mouseY < this.pos.y + 15) {

      return true;

    }

    return false;

  };

​

  this.show = function() {

    push();

    fill(200);

    if (this.hover()) {

      stroke(0);

    } else {

      stroke(100);

    }

    rect(this.pos.x, this.pos.y, textWidth(txt) + 10, 15);

    fill(0);

    noStroke();

    text(this.txt, this.pos.x + 5, this.pos.y + 12.5);

    pop();

  };

​

  this.whenPressed = function(func) {

    if (mouseIsPressed && this.hover) {

      if (!this.mouseIsOn) {

        func();

        this.mouseIsOn = true;

      }

    } else {

      this.mouseIsOn = false;

    }

  };

}