// Learning Processing
  // Daniel Shiffman
  // http://www.learningprocessing.com
  
  // Example 20-3: Doorbell with Minim
  
  class Doorbell {
    
    // Location and size
    float x;
    float y;
    float r;
    
    // An AudioPlayer object is used to store the sound.
    AudioSnippet dingdong; 
    
    // Create the doorbell
    Doorbell (float x_, float y_, float r_, String filename) {
      x = x_;
      y = y_;
      r = r_;
      
      // load "dingdong.wav" into a new AudioPlayer
      dingdong = Minim.loadSnippet(filename);
    }
    
    // If the "doorbell" is ringing, the shape jiggles
    void jiggle() {
      // The doorbell only jiggles if the sound is playing.
      if (dingdong.isPlaying()) { 
        x += random(-1,1);
        y += random(-1,1);
        r = constrain(r + random(-2,2),10,100);
      }
    }
    // The doorbell rings!
    void ring() {
      if (!dingdong.isPlaying()) {
        // The ring() function plays the sound, as long as it is not already playing. 
        // rewind() ensures the sound starts from the beginning.
        dingdong.rewind(); 
        dingdong.play();
      }
    }
  
    // Is a point inside the doorbell (used for mouse rollover, etc.)
    boolean contains(float mx, float my) {
      if (dist(mx,my,x,y) < r) {
        return true;
      } else {
        return false;
      }
    }
    // Show the doorbell (hardcoded colors, could be improved)
    void display(float mx, float my) {
      if (contains(mx,my)) {
        fill( 126,114,100);
      } else {
        fill(119,152,202);
      }
      stroke(202,175,142);
      ellipse(x,y,r,r);
    }
    void close() {
      // The doorbell has a close() function to close the AudioPlayer object.
      dingdong.close(); 
    }
  }