colorcoded-bar

A colorcoded bar.

Example

var Bar = require('colorcoded-bar');

// Vertical bar

(function(){
  var bar = new Bar();
  for (var i = 0; i < 100; i++) {
    bar.set(i, 'rgba(1, 1, 1, ' + i / 100 + ')');
  }
  document.body.appendChild(bar.render());
})();

// Horizontal bar

(function(){
  var bar = new Bar();
  for (var i = 0; i < 100; i++) {
    bar.set(i, 'rgba(1, 1, 1, ' + i / 100 + ')');
  }
  document.body.appendChild(bar.render({ horizontal: true }));
})();

// Automatic input scaling

(function(){
  var bar = new Bar();
  for (var i = 0; i < 10; i++) {
    bar.set(i, 'rgba(1, 1, 1, ' + i / 10 + ')');
  }
  document.body.appendChild(bar.render({ height: 200 }));
})();

// Pretty rainbows

(function(){
  var bar = new Bar();
  var height = 500;
  for (var i = 0; i < height; i++) {
    var color = 'hsl(' + Math.round(i / height * 360) + ', 100%, 50%)';
    bar.set(i, color);
  }
  document.body.appendChild(bar.render({ height: height }));
})();

Installation

$ npm install colorcoded-bar

API

new Bar()

Create a new colorcoded bar.

#set(idx, color)

Set color at idx, any css supported color notation will work.

#render([{ canvas, horizontal, height, width }])

Render the bar, returning a canvas.

Options:

• canvas: use an already existing canvas
• horizontal: render from left to right instead of top to bottom
• height / width: size the canvas. default: 100

License

MIT