johnny-five/wip/led.strip.js

Firmata based Arduino Programming Framework.

```js
var strips = new WeakMap();

Led.Strip = function(opts) {
  // ... make a strip device object with "opts"

  strips.set(this, {
    pixels: new Pixels({
      addr: i,
      clock: opts.clock,
      data: opts.data,
      firmata: this.firmata
    })
  });
};

Led.Strip.prototype.pixel = function(addr) {
  var strip = strips.get(this);

  return strip.pixels[addr];
};

var pixels = new WeakMap();

function Pixel(opts) {
  pixels.set(this, {
    addr: opts.addr,
    clock: opts.clock,
    data: opts.data
    color: ...
  });
}

Pixel.prototype.write = function() {
  var pixel = pixels.get(this);

  // do stuff with pi
};

Pixel.prototype.color = function(color) {
  var pixel = pixels.get(this);

  if (color) {
    // color (name|hex) => value translations
    // send value to device
    // update pixel.color = value
    return this;
  } else {
    return pixel.color;
  }
};
```

Then use of the API looks like this:

```js

var strip = new five.Led.Strip({
  pixels: 5, // Number of leds in the strip
  clock: 2, // Clock pin
  data: 3 // Data pin
});

// Get the pixel at address 10
var p = strip.pixel(10);

// set pixel 10 to red
p.color("#FF0000");

// ...OR...

// Get pixel 10, set it to the color blue!
strip.pixel(10).color("blue");

// What color is pixel 10?
strip.pixel(10).color(); // outputs the current color...
```

I'm not sure what form the return value of color should be... Maybe it could return an object with some representation of several formats? Like this:


```js
// What color is pixel 10?
strip.pixel(10).color("red").color();

// returns a plain object like:
{
  hex: "FF0000",
  name: "red"
}
```