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(); 
} 
; 
Phaser.Key.prototype = { 
update: function (){ 
if (!this.enabled) { 
return ; 
} 
if (this.isDown) { 
this.duration = this.game.time.now - 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.now; 
this.duration = 0; 
this.repeats = 0; 
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.now; 
this.duration = this.game.time.now - this.timeDown; 
this.onUp.dispatch(this); 
} 
,
reset: function (hard){ 
if (typeof hard === 'undefined') { 
hard = true ; 
} 
this.isDown = false ; 
this.isUp = true ; 
this.timeUp = this.game.time.now; 
this.duration = 0; 
this.enabled = true ; 
if (hard) { 
this.onDown.removeAll(); 
this.onUp.removeAll(); 
this.onHoldCallback = null ; 
this.onHoldContext = null ; 
} 
} 
,
justPressed: function (duration){ 
if (typeof duration === "undefined") { 
duration = 50; 
} 
return (this.isDown && this.duration < duration); 
} 
,
justReleased: function (duration){ 
if (typeof duration === "undefined") { 
duration = 50; 
} 
return (!this.isDown && ((this.game.time.now - this.timeUp) < duration)); 
} 
}
; 
Phaser.Key.prototype.constructor = Phaser.Key;