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// Generated by CoffeeScript 1.7.1
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/*
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  TouchController (stick + buttons) for touch devices
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  Based on the touch demo by Seb Lee-Delisle <http://seb.ly/>
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  @class bkcore.controllers.TouchController
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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 TouchController, Vec2, exports, _base;
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  TouchController = (function() {
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    TouchController.isCompatible = function() {
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      return 'ontouchstart' in document.documentElement;
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    };
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    /*
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      Creates a new TouchController
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      @param dom DOMElement The element that will listen to touch events
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      @param stickMargin int The left margin in px for stick detection
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      @param buttonCallback function Callback for non-stick touches
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     */
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    function TouchController(dom, stickMargin, buttonCallback) {
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      this.dom = dom;
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      this.stickMargin = stickMargin != null ? stickMargin : 200;
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      this.buttonCallback = buttonCallback != null ? buttonCallback : null;
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      this.active = true;
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      this.touches = null;
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      this.stickID = -1;
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      this.stickPos = new Vec2(0, 0);
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      this.stickStartPos = new Vec2(0, 0);
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      this.stickVector = new Vec2(0, 0);
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      this.dom.addEventListener('touchstart', ((function(_this) {
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        return function(e) {
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          return _this.touchStart(e);
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        };
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      })(this)), false);
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      this.dom.addEventListener('touchmove', ((function(_this) {
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        return function(e) {
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          return _this.touchMove(e);
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        };
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      })(this)), false);
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      this.dom.addEventListener('touchend', ((function(_this) {
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        return function(e) {
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          return _this.touchEnd(e);
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        };
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      })(this)), false);
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    }
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    /*
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      @private
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     */
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    TouchController.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 (this.stickID < 0 && touch.clientX < this.stickMargin) {
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          this.stickID = touch.identifier;
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          this.stickStartPos.set(touch.clientX, touch.clientY);
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          this.stickPos.copy(this.stickStartPos);
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          this.stickVector.set(0, 0);
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          continue;
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        } else {
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          if (typeof this.buttonCallback === "function") {
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            this.buttonCallback(true, touch, event);
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          }
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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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    TouchController.prototype.touchMove = function(event) {
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      var touch, _i, _len, _ref;
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      event.preventDefault();
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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 (this.stickID === touch.identifier && touch.clientX < this.stickMargin) {
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          this.stickPos.set(touch.clientX, touch.clientY);
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          this.stickVector.copy(this.stickPos).substract(this.stickStartPos);
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          break;
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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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    TouchController.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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      this.touches = event.touches;
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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 (this.stickID === touch.identifier) {
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          this.stickID = -1;
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          this.stickVector.set(0, 0);
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          break;
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        } else {
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          if (typeof this.buttonCallback === "function") {
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            this.buttonCallback(false, touch, event);
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          }
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        }
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      }
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      return false;
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    };
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    return TouchController;
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  })();
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  /*
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    Internal class used for vector2
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    @class Vec2
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    @private
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   */
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  Vec2 = (function() {
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    function Vec2(x, y) {
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      this.x = x != null ? x : 0;
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      this.y = y != null ? y : 0;
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    }
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    Vec2.prototype.substract = function(vec) {
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      this.x -= vec.x;
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      this.y -= vec.y;
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      return this;
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    };
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    Vec2.prototype.copy = function(vec) {
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      this.x = vec.x;
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      this.y = vec.y;
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      return this;
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    };
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    Vec2.prototype.set = function(x, y) {
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      this.x = x;
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      this.y = y;
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      return this;
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    };
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    return Vec2;
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  })();
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  /*
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    Exports
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    @package bkcore
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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.TouchController = TouchController;
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}).call(this);
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