Phaser.Key = function (game, keycode){ 
this.game = game; 
this._enabled = true ; 
this.event = null ; 
this.isDown = false ; 
this.isUp = true ; 
this.altKey = false ; 
this.ctrlKey = false ; 
this.shiftKey = false ; 
this.timeDown = 0; 
this.duration = 0; 
this.timeUp = -2500; 
this.repeats = 0; 
this.keyCode = keycode; 
this.onDown = new Phaser.Signal(); 
this.onHoldCallback = null ; 
this.onHoldContext = null ; 
this.onUp = new Phaser.Signal(); 
this._justDown = false ; 
this._justUp = false ; 
} 
; 
Phaser.Key.prototype = { 
update: function (){ 
if (!this._enabled) { 
return ; 
} 
if (this.isDown) { 
this.duration = this.game.time.time - this.timeDown; 
this.repeats++ ; 
if (this.onHoldCallback) { 
this.onHoldCallback.call(this.onHoldContext, this); 
} 
} 
} 
,
processKeyDown: function (event){ 
if (!this._enabled) { 
return ; 
} 
this.event = event; 
if (this.isDown) { 
return ; 
} 
this.altKey = event.altKey; 
this.ctrlKey = event.ctrlKey; 
this.shiftKey = event.shiftKey; 
this.isDown = true ; 
this.isUp = false ; 
this.timeDown = this.game.time.time; 
this.duration = 0; 
this.repeats = 0; 
this._justDown = true ; 
this.onDown.dispatch(this); 
} 
,
processKeyUp: function (event){ 
if (!this._enabled) { 
return ; 
} 
this.event = event; 
if (this.isUp) { 
return ; 
} 
this.isDown = false ; 
this.isUp = true ; 
this.timeUp = this.game.time.time; 
this.duration = this.game.time.time - this.timeDown; 
this._justUp = true ; 
this.onUp.dispatch(this); 
} 
,
reset: function (hard){ 
if (hard === undefined) { 
hard = true ; 
} 
this.isDown = false ; 
this.isUp = true ; 
this.timeUp = this.game.time.time; 
this.duration = 0; 
this._enabled = true ; 
this._justDown = false ; 
this._justUp = false ; 
if (hard) { 
this.onDown.removeAll(); 
this.onUp.removeAll(); 
this.onHoldCallback = null ; 
this.onHoldContext = null ; 
} 
} 
,
downDuration: function (duration){ 
if (duration === undefined) { 
duration = 50; 
} 
return (this.isDown && this.duration < duration); 
} 
,
upDuration: function (duration){ 
if (duration === undefined) { 
duration = 50; 
} 
return (!this.isDown && ((this.game.time.time - this.timeUp) < duration)); 
} 
}
; 
Object.defineProperty(Phaser.Key.prototype, "justDown", { 
get: function (){ 
var current = this._justDown; 
this._justDown = false ; 
return current; 
} 
}
); 
Object.defineProperty(Phaser.Key.prototype, "justUp", { 
get: function (){ 
var current = this._justUp; 
this._justUp = false ; 
return current; 
} 
}
); 
Object.defineProperty(Phaser.Key.prototype, "enabled", { 
get: function (){ 
return this._enabled; 
} 
,
set: function (value){ 
value = !!value; 
if (value !== this._enabled) { 
if (!value) { 
this.reset(false ); 
} 
this._enabled = value; 
} 
} 
}
); 
Phaser.Key.prototype.constructor = Phaser.Key;