Game_Timer in window

// TimerWindow.js
// Created on 8/21/2018
/*:
* @plugindesc This plugin is meant to display the game timer in a window.
* @author Yethwhinger
* @help This plugin replaces the game timer sprite with a
* game timer window.
*/

//-----------------------------------------------------------------------------
// Window_Timer
//
// The window for displaying the game timer.

function Window_Timer() {
    this.initialize.apply(this, arguments);
}

Window_Timer.prototype = Object.create(Window_Base.prototype);
Window_Timer.prototype.constructor = Window_Timer;

Window_Timer.prototype.initialize = function (x, y, w) {
    var height = this.windowHeight();
    Window_Base.prototype.initialize.call(this, x, y, w, height);
    this._seconds = 0;
    this.openness = 0;
    this.refresh();
};

Window_Timer.prototype.windowHeight = function () {
    return this.fittingHeight(1);
};

Window_Timer.prototype.refresh = function () {
    var x = this.textPadding();
    var width = this.contents.width - this.textPadding() * 2;
    this.contents.clear();
    this.drawText(this.value(), x, 0, width);
};

Window_Timer.prototype.value = function () {
    return Sprite_Timer.prototype.timerText.call(this);
};

Window_Timer.prototype.open = function () {
    this.refresh();
    Window_Base.prototype.open.call(this);
};

Window_Timer.prototype.update = function () {
    if (this._seconds !== $gameTimer.seconds()) {
        this._seconds = $gameTimer.seconds();
        this.refresh();
    }
    Window_Base.prototype.update.call(this);
    this.updateVisibility();
};

Window_Timer.prototype.updateVisibility = function () {
    if (!$gameTimer.isWorking()) {
        this.close();
    }
    else {
        this.open();
    }
};

//----------------------------
// Changes to Spriteset_Base
//----------------------------

Spriteset_Base.prototype.createUpperLayer = function () {
    this.createPictures();
    this.createScreenSprites();
};

//----------------------------
// Changes to Scene_Map
//----------------------------

var _Scene_Map_createAllWindows = Scene_Map.prototype.createAllWindows;
Scene_Map.prototype.createAllWindows = function () {
    this.createTimerWindow();
    _Scene_Map_createAllWindows.call(this);
};

Scene_Map.prototype.createTimerWindow = function () {
    var w = 120;
    var x = Graphics.width - w;
    var y = 0;
    this._timerWindow = new Window_Timer(x, y, w);
    this.addChild(this._timerWindow);
};