index.js

var events = require('events')
var bindings = require('bindings')
var Mouse = bindings('addon').Mouse

module.exports = function () {
  var that = new events.EventEmitter()
  var mouse = null
  var left = false
  var right = false

  that.once('newListener', function () {
    mouse = new Mouse(function (type, x, y) {
      if (type === 'left-down') left = true
      else if (type === 'left-up') left = false
      else if (type === 'right-down') right = true
      else if (type === 'right-up') right = false

      if (type === 'move' && left) type = 'left-drag'
      else if (type === 'move' && right) type = 'right-drag'

      that.emit(type, x, y)
    })
  })

  that.ref = function () {
    if (mouse) mouse.ref()
  }

  that.unref = function () {
    if (mouse) mouse.unref()
  }

  that.destroy = function () {
    if (mouse) mouse.destroy()
    mouse = null
  }

  return that
}