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// Generated by CoffeeScript 1.4.0
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/*
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  OrientationController (Orientation + buttons) for touch devices
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  @class bkcore.OrientationController
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  @author Thibaut 'BKcore' Despoulain <http://bkcore.com>
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*/
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(function() {
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  var OrientationController, exports, _base;
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  OrientationController = (function() {
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    OrientationController.isCompatible = function() {
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      return 'DeviceOrientationEvent' in window;
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    };
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    /*
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        Creates a new OrientationController
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        @param dom DOMElement The element that will listen to touch events
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        @param registerTouch bool Enable touch detection
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        @param touchCallback function Callback for touches
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    */
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    function OrientationController(dom, registerTouch, touchCallback) {
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      var _this = this;
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      this.dom = dom;
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      this.registerTouch = registerTouch != null ? registerTouch : true;
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      this.touchCallback = touchCallback != null ? touchCallback : null;
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      this.active = true;
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      this.alpha = 0.0;
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      this.beta = 0.0;
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      this.gamma = 0.0;
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      this.dalpha = null;
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      this.dbeta = null;
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      this.dgamma = null;
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      this.touches = null;
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      window.addEventListener('deviceorientation', (function(e) {
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        return _this.orientationChange(e);
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      }), false);
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      if (this.registerTouch) {
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        this.dom.addEventListener('touchstart', (function(e) {
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          return _this.touchStart(e);
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        }), false);
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        this.dom.addEventListener('touchend', (function(e) {
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          return _this.touchEnd(e);
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        }), false);
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      }
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    }
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    /*
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        @private
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    */
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    OrientationController.prototype.orientationChange = function(event) {
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      if (!this.active) {
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        return;
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      }
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      if (this.dalpha === null) {
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        console.log("calbrate", event.beta);
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        this.dalpha = event.alpha;
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        this.dbeta = event.beta;
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        this.dgamma = event.gamma;
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      }
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      this.alpha = event.alpha - this.dalpha;
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      this.beta = event.beta - this.dbeta;
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      this.gamma = event.gamma - this.dgamma;
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      return false;
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    };
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    /*
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        @private
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    */
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    OrientationController.prototype.touchStart = function(event) {
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      var touch, _i, _len, _ref;
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      if (!this.active) {
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        return;
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      }
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      _ref = event.changedTouches;
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      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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        touch = _ref[_i];
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        if (typeof this.touchCallback === "function") {
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          this.touchCallback(true, touch, event);
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        }
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      }
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      this.touches = event.touches;
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      return false;
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    };
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    /*
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        @private
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    */
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    OrientationController.prototype.touchEnd = function(event) {
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      var touch, _i, _len, _ref;
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      if (!this.active) {
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        return;
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      }
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      _ref = event.changedTouches;
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      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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        touch = _ref[_i];
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        if (typeof this.touchCallback === "function") {
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          this.touchCallback(true, touch, event);
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        }
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      }
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      this.touches = event.touches;
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      return false;
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    };
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    return OrientationController;
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  })();
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  exports = exports != null ? exports : this;
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  exports.bkcore || (exports.bkcore = {});
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  (_base = exports.bkcore).controllers || (_base.controllers = {});
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  exports.bkcore.controllers.OrientationController = OrientationController;
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}).call(this);
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