Learning Processing: A Beginner's Guide to Programming Images ...

386 Learning Processing
Exercise 20-2: Rewrite the Doorbell class to include a reference to the Sonia sample. Th is
will allow you to easily make multiple Doorbell objects that each play a diff erent sound.
Here is some code to get you started.
// A Class to describe a " doorbell " (really a button)
class Doorbell {
// Location and size
float x;
float y;
float r;
// A sample object (for a sound)
_________ ____________;
// Create the doorbell
Doorbell (float x_, float y_, float r_, _______ filename) {
}
}
x = x_;
y = y_;
r = r_;
_________ = new _________(_____________);
void ring() {
}
____________________;
boolean contains(float mx, float my) {
}
// same as original
void display(float mx, float my) {
}
// same as original
If you run the Doorbell example and click on the doorbell many times in rapid succession, you will notice
that the sound restarts every time you click. It is not given a chance to fi rst fi nish playing. While this
is not much of an issue for this straightforward example, stopping a sound from restarting can be very
important in other, more complex, sound sketches. Th e simplest way to achieve such a result is to always