    /**
     * @class Ext.picker.Date
     * @extends Ext.Component
     * <p>A date picker. This class is used by the {@link Ext.form.field.Date} field to allow browsing and
     * selection of valid dates in a popup next to the field, but may also be used with other components.</p>
     * <p>Typically you will need to implement a handler function to be notified when the user chooses a color from the
     * picker; you can register the handler using the {@link #select} event, or by implementing the {@link #handler}
     * method.</p>
     * <p>By default the user will be allowed to pick any date; this can be changed by using the {@link #minDate},
     * {@link #maxDate}, {@link #disabledDays}, {@link #disabledDatesRE}, and/or {@link #disabledDates} configs.</p>
     * <p>All the string values documented below may be overridden by including an Ext locale file in your page.</p>
     * <p>Example usage:</p>
     * <pre><code>new Ext.panel.Panel({
        title: 'Choose a future date:',
        width: 200,
        bodyPadding: 10,
        renderTo: Ext.getBody(),
        items: [{
            xtype: 'datepicker',
            minDate: new Date(),
            handler: function(picker, date) {
                // do something with the selected date
            }
        }]
    });</code></pre>
     * {@img Ext.picker.Date/Ext.picker.Date.png Ext.picker.Date component}
     *
     */
    Ext.define('Ext.picker.Date', {
        extend: 'Ext.Component',
        requires: [
            'Ext.XTemplate',
            'Ext.button.Button',
            'Ext.button.Split',
            'Ext.util.ClickRepeater',
            'Ext.util.KeyNav',
            'Ext.EventObject',
            'Ext.fx.Manager',
            'Ext.picker.Month'
        ],
        alias: 'widget.datepicker',
        alternateClassName: 'Ext.DatePicker',

        renderTpl: [
            '<div class="{cls}" id="{id}" role="grid" title="{ariaTitle} {value:this.longDay}">',
                '<div role="presentation" class="{baseCls}-header">',
                    '<div class="{baseCls}-prev"><a href="#" role="button" title="{prevText}"></a></div>',
                    '<div class="{baseCls}-month"></div>',
                    '<div class="{baseCls}-next"><a href="#" role="button" title="{nextText}"></a></div>',
                '</div>',
                '<table class="{baseCls}-inner" cellspacing="0" role="presentation">',
                    '<thead role="presentation"><tr role="presentation">',
                        '<tpl for="dayNames">',
                            '<th role="columnheader" title="{.}"><span>{.:this.firstInitial}</span></th>',
                        '</tpl>',
                    '</tr></thead>',
                    '<tbody role="presentation"><tr role="presentation">',
                        '<tpl for="days">',
                            '{#:this.isEndOfWeek}',
                            '<td role="gridcell" id="{[Ext.id()]}">',
                                '<a role="presentation" href="#" hidefocus="on" class="{parent.baseCls}-date" tabIndex="1">',
                                    '<em role="presentation"><span role="presentation"></span></em>',
                                '</a>',
                            '</td>',
                        '</tpl>',
                    '</tr></tbody>',
                '</table>',
                '<tpl if="showToday">',
                    '<div role="presentation" class="{baseCls}-footer"></div>',
                '</tpl>',
            '</div>',
            {
                firstInitial: function(value) {
                    return value.substr(0,1);
                },
                isEndOfWeek: function(value) {
                    // convert from 1 based index to 0 based
                    // by decrementing value once.
                    value--;
                    var end = value % 7 === 0 && value !== 0;
                    return end ? '</tr><tr role="row">' : '';
                },
                longDay: function(value){
                    return Ext.Date.format(value, this.longDayFormat);
                }
            }
        ],

        ariaTitle: 'Date Picker',
        /**
         * @cfg {String} todayText
         * The text to display on the button that selects the current date (defaults to <code>'Today'</code>)
         */
        todayText : 'Today',
        /**
         * @cfg {Function} handler
         * Optional. A function that will handle the select event of this picker.
         * The handler is passed the following parameters:<div class="mdetail-params"><ul>
         * <li><code>picker</code> : Ext.picker.Date <div class="sub-desc">This Date picker.</div></li>
         * <li><code>date</code> : Date <div class="sub-desc">The selected date.</div></li>
         * </ul></div>
         */
        /**
         * @cfg {Object} scope
         * The scope (<code><b>this</b></code> reference) in which the <code>{@link #handler}</code>
         * function will be called.  Defaults to this DatePicker instance.
         */
        /**
         * @cfg {String} todayTip
         * A string used to format the message for displaying in a tooltip over the button that
         * selects the current date. Defaults to <code>'{0} (Spacebar)'</code> where
         * the <code>{0}</code> token is replaced by today's date.
         */
        todayTip : '{0} (Spacebar)',
        /**
         * @cfg {String} minText
         * The error text to display if the minDate validation fails (defaults to <code>'This date is before the minimum date'</code>)
         */
        minText : 'This date is before the minimum date',
        /**
         * @cfg {String} maxText
         * The error text to display if the maxDate validation fails (defaults to <code>'This date is after the maximum date'</code>)
         */
        maxText : 'This date is after the maximum date',
        /**
         * @cfg {String} format
         * The default date format string which can be overriden for localization support.  The format must be
         * valid according to {@link Ext.Date#parse} (defaults to {@link Ext.Date#defaultFormat}).
         */
        /**
         * @cfg {String} disabledDaysText
         * The tooltip to display when the date falls on a disabled day (defaults to <code>'Disabled'</code>)
         */
        disabledDaysText : 'Disabled',
        /**
         * @cfg {String} disabledDatesText
         * The tooltip text to display when the date falls on a disabled date (defaults to <code>'Disabled'</code>)
         */
        disabledDatesText : 'Disabled',
        /**
         * @cfg {Array} monthNames
         * An array of textual month names which can be overriden for localization support (defaults to Ext.Date.monthNames)
         */
        /**
         * @cfg {Array} dayNames
         * An array of textual day names which can be overriden for localization support (defaults to Ext.Date.dayNames)
         */
        /**
         * @cfg {String} nextText
         * The next month navigation button tooltip (defaults to <code>'Next Month (Control+Right)'</code>)
         */
        nextText : 'Next Month (Control+Right)',
        /**
         * @cfg {String} prevText
         * The previous month navigation button tooltip (defaults to <code>'Previous Month (Control+Left)'</code>)
         */
        prevText : 'Previous Month (Control+Left)',
        /**
         * @cfg {String} monthYearText
         * The header month selector tooltip (defaults to <code>'Choose a month (Control+Up/Down to move years)'</code>)
         */
        monthYearText : 'Choose a month (Control+Up/Down to move years)',
        /**
         * @cfg {Number} startDay
         * Day index at which the week should begin, 0-based (defaults to 0, which is Sunday)
         */
        startDay : 0,
        /**
         * @cfg {Boolean} showToday
         * False to hide the footer area containing the Today button and disable the keyboard handler for spacebar
         * that selects the current date (defaults to <code>true</code>).
         */
        showToday : true,
        /**
         * @cfg {Date} minDate
         * Minimum allowable date (JavaScript date object, defaults to null)
         */
        /**
         * @cfg {Date} maxDate
         * Maximum allowable date (JavaScript date object, defaults to null)
         */
        /**
         * @cfg {Array} disabledDays
         * An array of days to disable, 0-based. For example, [0, 6] disables Sunday and Saturday (defaults to null).
         */
        /**
         * @cfg {RegExp} disabledDatesRE
         * JavaScript regular expression used to disable a pattern of dates (defaults to null).  The {@link #disabledDates}
         * config will generate this regex internally, but if you specify disabledDatesRE it will take precedence over the
         * disabledDates value.
         */
        /**
         * @cfg {Array} disabledDates
         * An array of 'dates' to disable, as strings. These strings will be used to build a dynamic regular
         * expression so they are very powerful. Some examples:
         * <ul>
         * <li>['03/08/2003', '09/16/2003'] would disable those exact dates</li>
         * <li>['03/08', '09/16'] would disable those days for every year</li>
         * <li>['^03/08'] would only match the beginning (useful if you are using short years)</li>
         * <li>['03/../2006'] would disable every day in March 2006</li>
         * <li>['^03'] would disable every day in every March</li>
         * </ul>
         * Note that the format of the dates included in the array should exactly match the {@link #format} config.
         * In order to support regular expressions, if you are using a date format that has '.' in it, you will have to
         * escape the dot when restricting dates. For example: ['03\\.08\\.03'].
         */

        /**
         * @cfg {Boolean} disableAnim True to disable animations when showing the month picker. Defaults to <tt>false</tt>.
         */
        disableAnim: true,

        /**
         * @cfg {String} baseCls
         * The base CSS class to apply to this components element (defaults to <tt>'x-datepicker'</tt>).
         */
        baseCls: Ext.baseCSSPrefix + 'datepicker',

        /**
         * @cfg {String} selectedCls
         * The class to apply to the selected cell. Defaults to <tt>'x-datepicker-selected'</tt>
         */

        /**
         * @cfg {String} disabledCellCls
         * The class to apply to disabled cells. Defaults to <tt>'x-datepicker-disabled'</tt>
         */

        /**
         * @cfg {String} longDayFormat
         * The format for displaying a date in a longer format. Defaults to <tt>'F d, Y'</tt>
         */
        longDayFormat: 'F d, Y',

        /**
         * @cfg {Object} keyNavConfig Specifies optional custom key event handlers for the {@link Ext.util.KeyNav}
         * attached to this date picker. Must conform to the config format recognized by the {@link Ext.util.KeyNav}
         * constructor. Handlers specified in this object will replace default handlers of the same name.
         */

        /**
         * @cfg {Boolean} focusOnShow
         * True to automatically focus the picker on show. Defaults to <tt>false</tt>.
         */
        focusOnShow: false,

        // private
        // Set by other components to stop the picker focus being updated when the value changes.
        focusOnSelect: true,

        width: 178,

        // default value used to initialise each date in the DatePicker
        // (note: 12 noon was chosen because it steers well clear of all DST timezone changes)
        initHour: 12, // 24-hour format

        numDays: 42,

        // private, inherit docs
        initComponent : function() {
            var me = this,
                clearTime = Ext.Date.clearTime;

            me.selectedCls = me.baseCls + '-selected';
            me.disabledCellCls = me.baseCls + '-disabled';
            me.prevCls = me.baseCls + '-prevday';
            me.activeCls = me.baseCls + '-active';
            me.nextCls = me.baseCls + '-prevday';
            me.todayCls = me.baseCls + '-today';
            me.dayNames = me.dayNames.slice(me.startDay).concat(me.dayNames.slice(0, me.startDay));
            this.callParent();

            me.value = me.value ?
                     clearTime(me.value, true) : clearTime(new Date());

            me.addEvents(
                /**
                 * @event select
                 * Fires when a date is selected
                 * @param {DatePicker} this DatePicker
                 * @param {Date} date The selected date
                 */
                'select'
            );

            me.initDisabledDays();
        },

        // private, inherit docs
        onRender : function(container, position){
            /*
             * days array for looping through 6 full weeks (6 weeks * 7 days)
             * Note that we explicitly force the size here so the template creates
             * all the appropriate cells.
             */

            var me = this,
                days = new Array(me.numDays),
                today = Ext.Date.format(new Date(), me.format);

            Ext.applyIf(me, {
                renderData: {},
                renderSelectors: {}
            });

            Ext.apply(me.renderData, {
                dayNames: me.dayNames,
                ariaTitle: me.ariaTitle,
                value: me.value,
                showToday: me.showToday,
                prevText: me.prevText,
                nextText: me.nextText,
                days: days
            });
            me.getTpl('renderTpl').longDayFormat = me.longDayFormat;

            Ext.apply(me.renderSelectors, {
                eventEl: 'table.' + me.baseCls + '-inner',
                prevEl: '.' + me.baseCls + '-prev a',
                nextEl: '.' + me.baseCls + '-next a',
                middleBtnEl: '.' + me.baseCls + '-month',
                footerEl: '.' + me.baseCls + '-footer'
            });

            this.callParent(arguments);
            me.el.unselectable();

            me.cells = me.eventEl.select('tbody td');
            me.textNodes = me.eventEl.query('tbody td span');

            me.monthBtn = Ext.create('Ext.button.Split', {
                text: '',
                tooltip: me.monthYearText,
                renderTo: me.middleBtnEl
            });
            //~ me.middleBtnEl.down('button').addCls(Ext.baseCSSPrefix + 'btn-arrow');

            me.todayBtn = Ext.create('Ext.button.Button', {
                renderTo: me.footerEl,
                text: Ext.String.format(me.todayText, today),
                tooltip: Ext.String.format(me.todayTip, today),
                handler: me.selectToday,
                scope: me
            });
        },

        // private, inherit docs
        initEvents: function(){
            var me = this,
                eDate = Ext.Date,
                day = eDate.DAY;

            this.callParent();

            me.prevRepeater = Ext.create('Ext.util.ClickRepeater', me.prevEl, {
                handler: me.showPrevMonth,
                scope: me,
                preventDefault: true,
                stopDefault: true
            });

            me.nextRepeater = Ext.create('Ext.util.ClickRepeater', me.nextEl, {
                handler: me.showNextMonth,
                scope: me,
                preventDefault:true,
                stopDefault:true
            });

            me.keyNav = Ext.create('Ext.util.KeyNav', me.eventEl, Ext.apply({
                scope: me,
                'left' : function(e){
                    if(e.ctrlKey){
                        me.showPrevMonth();
                    }else{
                        me.update(eDate.add(me.activeDate, day, -1));
                    }
                },

                'right' : function(e){
                    if(e.ctrlKey){
                        me.showNextMonth();
                    }else{
                        me.update(eDate.add(me.activeDate, day, 1));
                    }
                },

                'up' : function(e){
                    if(e.ctrlKey){
                        me.showNextYear();
                    }else{
                        me.update(eDate.add(me.activeDate, day, -7));
                    }
                },

                'down' : function(e){
                    if(e.ctrlKey){
                        me.showPrevYear();
                    }else{
                        me.update(eDate.add(me.activeDate, day, 7));
                    }
                },
                'pageUp' : me.showNextMonth,
                'pageDown' : me.showPrevMonth,
                'enter' : function(e){
                    e.stopPropagation();
                    return true;
                }
            }, me.keyNavConfig));

            if(me.showToday){
                me.todayKeyListener = me.eventEl.addKeyListener(Ext.EventObject.SPACE, me.selectToday,  me);
            }
            me.mon(me.eventEl, 'mousewheel', me.handleMouseWheel, me);
            me.mon(me.eventEl, 'click', me.handleDateClick,  me, {delegate: 'a.' + me.baseCls + '-date'});
            me.mon(me.monthBtn, 'click', me.showMonthPicker, me);
            me.mon(me.monthBtn, 'arrowclick', me.showMonthPicker, me);
            me.update(me.value);
        },

        /**
         * Setup the disabled dates regex based on config options
         * @private
         */
        initDisabledDays : function(){
            var me = this,
                dd = me.disabledDates,
                re = '(?:',
                len;

            if(!me.disabledDatesRE && dd){
                    len = dd.length - 1;

                Ext.each(dd, function(d, i){
                    re += Ext.isDate(d) ? '^' + Ext.String.escapeRegex(Ext.Date.dateFormat(d, me.format)) + '$' : dd[i];
                    if(i != len){
                        re += '|';
                    }
                }, me);
                me.disabledDatesRE = new RegExp(re + ')');
            }
        },

        /**
         * Replaces any existing disabled dates with new values and refreshes the DatePicker.
         * @param {Array/RegExp} disabledDates An array of date strings (see the {@link #disabledDates} config
         * for details on supported values), or a JavaScript regular expression used to disable a pattern of dates.
         * @return {Ext.picker.Date} this
         */
        setDisabledDates : function(dd){
            var me = this;

            if(Ext.isArray(dd)){
                me.disabledDates = dd;
                me.disabledDatesRE = null;
            }else{
                me.disabledDatesRE = dd;
            }
            me.initDisabledDays();
            me.update(me.value, true);
            return me;
        },

        /**
         * Replaces any existing disabled days (by index, 0-6) with new values and refreshes the DatePicker.
         * @param {Array} disabledDays An array of disabled day indexes. See the {@link #disabledDays} config
         * for details on supported values.
         * @return {Ext.picker.Date} this
         */
        setDisabledDays : function(dd){
            this.disabledDays = dd;
            return this.update(this.value, true);
        },

        /**
         * Replaces any existing {@link #minDate} with the new value and refreshes the DatePicker.
         * @param {Date} value The minimum date that can be selected
         * @return {Ext.picker.Date} this
         */
        setMinDate : function(dt){
            this.minDate = dt;
            return this.update(this.value, true);
        },

        /**
         * Replaces any existing {@link #maxDate} with the new value and refreshes the DatePicker.
         * @param {Date} value The maximum date that can be selected
         * @return {Ext.picker.Date} this
         */
        setMaxDate : function(dt){
            this.maxDate = dt;
            return this.update(this.value, true);
        },

        /**
         * Sets the value of the date field
         * @param {Date} value The date to set
         * @return {Ext.picker.Date} this
         */
        setValue : function(value){
            this.value = Ext.Date.clearTime(value, true);
            return this.update(this.value);
        },

        /**
         * Gets the current selected value of the date field
         * @return {Date} The selected date
         */
        getValue : function(){
            return this.value;
        },

        // private
        focus : function(){
            this.update(this.activeDate);
        },

        // private, inherit docs
        onEnable: function(){
            this.callParent();
            this.setDisabledStatus(false);
            this.update(this.activeDate);

        },

        // private, inherit docs
        onDisable : function(){
            this.callParent();
            this.setDisabledStatus(true);
        },

        /**
         * Set the disabled state of various internal components
         * @private
         * @param {Boolean} disabled
         */
        setDisabledStatus : function(disabled){
            var me = this;

            me.keyNav.setDisabled(disabled);
            me.prevRepeater.setDisabled(disabled);
            me.nextRepeater.setDisabled(disabled);
            if (me.showToday) {
                me.todayKeyListener.setDisabled(disabled);
                me.todayBtn.setDisabled(disabled);
            }
        },

        /**
         * Get the current active date.
         * @private
         * @return {Date} The active date
         */
        getActive: function(){
            return this.activeDate || me.value;
        },

        /**
         * Run any animation required to hide/show the month picker.
         * @private
         * @param {Boolean} isHide True if it's a hide operation
         */
        runAnimation: function(isHide){
            var options = {
                    target: this.monthPicker,
                    duration: 200
                };

            Ext.fx.Manager.run();
            if (isHide) {
                //TODO: slideout
            } else {
                //TODO: slidein
            }
            Ext.create('Ext.fx.Anim', options);
        },

        /**
         * Hides the month picker, if it's visible.
         * @return {Ext.picker.Date} this
         */
        hideMonthPicker : function(){
            var me = this,
                picker = me.monthPicker;

            if (picker) {
                if (me.disableAnim) {
                    picker.hide();
                } else {
                    this.runAnimation(true);
                }
            }
            return me;
        },

        /**
         * Show the month picker
         * @return {Ext.picker.Date} this
         */
        showMonthPicker : function(){

            var me = this,
                picker,
                size,
                top,
                left;

            if (me.rendered && !me.disabled) {
                size = me.getSize();
                picker = me.createMonthPicker();
                picker.show();
                picker.setSize(size);
                picker.setValue(me.getActive());

                if (me.disableAnim) {
                    picker.setPosition(-1, -1);
                } else {
                    me.runAnimation(false);
                }
            }
            return me;
        },

        /**
         * Create the month picker instance
         * @private
         * @return {Ext.picker.Month} picker
         */
        createMonthPicker: function(){
            var me = this,
                picker = me.monthPicker;

            if (!picker) {
                me.monthPicker = picker = Ext.create('Ext.picker.Month', {
                    renderTo: me.el,
                    floating: true,
                    shadow: false,
                    small: me.showToday === false,
                    listeners: {
                        scope: me,
                        cancelclick: me.onCancelClick,
                        okclick: me.onOkClick,
                        yeardblclick: me.onOkClick,
                        monthdblclick: me.onOkClick
                    }
                });

                me.on('beforehide', me.hideMonthPicker, me);
            }
            return picker;
        },

        /**
         * Respond to an ok click on the month picker
         * @private
         */
        onOkClick: function(picker, value){
            var me = this,
                month = value[0],
                year = value[1],
                date = new Date(year, month, me.getActive().getDate());

            if (date.getMonth() !== month) {
                // 'fix' the JS rolling date conversion if needed
                date = new Date(year, month, 1).getLastDateOfMonth();
            }
            me.update(date);
            me.hideMonthPicker();
        },

        /**
         * Respond to a cancel click on the month picker
         * @private
         */
        onCancelClick: function(){
            this.hideMonthPicker();
        },

        /**
         * Show the previous month.
         * @return {Ext.picker.Date} this
         */
        showPrevMonth : function(e){
            return this.update(Ext.Date.add(this.activeDate, Ext.Date.MONTH, -1));
        },

        /**
         * Show the next month.
         * @return {Ext.picker.Date} this
         */
        showNextMonth : function(e){
            return this.update(Ext.Date.add(this.activeDate, Ext.Date.MONTH, 1));
        },

        /**
         * Show the previous year.
         * @return {Ext.picker.Date} this
         */
        showPrevYear : function(){
            this.update(Ext.Date.add(this.activeDate, Ext.Date.YEAR, -1));
        },

        /**
         * Show the next year.
         * @return {Ext.picker.Date} this
         */
        showNextYear : function(){
            this.update(Ext.Date.add(this.activeDate, Ext.Date.YEAR, 1));
        },

        /**
         * Respond to the mouse wheel event
         * @private
         * @param {Ext.EventObject} e
         */
        handleMouseWheel : function(e){
            e.stopEvent();
            if(!this.disabled){
                var delta = e.getWheelDelta();
                if(delta > 0){
                    this.showPrevMonth();
                } else if(delta < 0){
                    this.showNextMonth();
                }
            }
        },

        /**
         * Respond to a date being clicked in the picker
         * @private
         * @param {Ext.EventObject} e
         * @param {HTMLElement} t
         */
        handleDateClick : function(e, t){
            var me = this,
                handler = me.handler;

            e.stopEvent();
            if(!me.disabled && t.dateValue && !Ext.fly(t.parentNode).hasCls(me.disabledCellCls)){
                me.cancelFocus = me.focusOnSelect === false;
                me.setValue(new Date(t.dateValue));
                delete me.cancelFocus;
                me.fireEvent('select', me, me.value);
                if (handler) {
                    handler.call(me.scope || me, me, me.value);
                }
                // event handling is turned off on hide
                // when we are using the picker in a field
                // therefore onSelect comes AFTER the select
                // event.
                me.onSelect();
            }
        },

        /**
         * Perform any post-select actions
         * @private
         */
        onSelect: function() {
            if (this.hideOnSelect) {
                 this.hide();
             }
        },

        /**
         * Sets the current value to today.
         * @return {Ext.picker.Date} this
         */
        selectToday : function(){
            var me = this,
                btn = me.todayBtn,
                handler = me.handler;

            if(btn && !btn.disabled){
                me.setValue(Ext.Date.clearTime(new Date()));
                me.fireEvent('select', me, me.value);
                if (handler) {
                    handler.call(me.scope || me, me, me.value);
                }
                me.onSelect();
            }
            return me;
        },

        /**
         * Update the selected cell
         * @private
         * @param {Date} date The new date
         * @param {Date} active The active date
         */
        selectedUpdate: function(date, active){
            var me = this,
                t = date.getTime(),
                cells = me.cells,
                cls = me.selectedCls;

            cells.removeCls(cls);
            cells.each(function(c){
                if (c.dom.firstChild.dateValue == t) {
                    me.el.dom.setAttribute('aria-activedescendent', c.dom.id);
                    c.addCls(cls);
                    if(me.isVisible() && !me.cancelFocus){
                        Ext.fly(c.dom.firstChild).focus(50);
                    }
                    return false;
                }
            }, this);
        },

        /**
         * Update the contents of the picker for a new month
         * @private
         * @param {Date} date The new date
         * @param {Date} active The active date
         */
        fullUpdate: function(date, active){
            var me = this,
                cells = me.cells.elements,
                textNodes = me.textNodes,
                disabledCls = me.disabledCellCls,
                eDate = Ext.Date,
                i = 0,
                extraDays = 0,
                visible = me.isVisible(),
                sel = +eDate.clearTime(date, true),
                today = +eDate.clearTime(new Date()),
                min = me.minDate ? eDate.clearTime(me.minDate, true) : Number.NEGATIVE_INFINITY,
                max = me.maxDate ? eDate.clearTime(me.maxDate, true) : Number.POSITIVE_INFINITY,
                ddMatch = me.disabledDatesRE,
                ddText = me.disabledDatesText,
                ddays = me.disabledDays ? me.disabledDays.join('') : false,
                ddaysText = me.disabledDaysText,
                format = me.format,
                days = eDate.getDaysInMonth(date),
                firstOfMonth = eDate.getFirstDateOfMonth(date),
                startingPos = firstOfMonth.getDay() - me.startDay,
                previousMonth = eDate.add(date, eDate.MONTH, -1),
                longDayFormat = me.longDayFormat,
                prevStart,
                current,
                disableToday,
                tempDate,
                setCellClass,
                html,
                cls,
                formatValue,
                value;

            if (startingPos < 0) {
                startingPos += 7;
            }

            days += startingPos;
            prevStart = eDate.getDaysInMonth(previousMonth) - startingPos;
            current = new Date(previousMonth.getFullYear(), previousMonth.getMonth(), prevStart, me.initHour);

            if (me.showToday) {
                tempDate = eDate.clearTime(new Date());
                disableToday = (tempDate < min || tempDate > max ||
                    (ddMatch && format && ddMatch.test(eDate.dateFormat(tempDate, format))) ||
                    (ddays && ddays.indexOf(tempDate.getDay()) != -1));

                if (!me.disabled) {
                    me.todayBtn.setDisabled(disableToday);
                    me.todayKeyListener.setDisabled(disableToday);
                }
            }

            setCellClass = function(cell){
                value = +eDate.clearTime(current, true);
                cell.title = eDate.format(current, longDayFormat);
                // store dateValue number as an expando
                cell.firstChild.dateValue = value;
                if(value == today){
                    cell.className += ' ' + me.todayCls;
                    cell.title = me.todayText;
                }
                if(value == sel){
                    cell.className += ' ' + me.selectedCls;
                    me.el.dom.setAttribute('aria-activedescendant', cell.id);
                    if (visible && me.floating) {
                        Ext.fly(cell.firstChild).focus(50);
                    }
                }
                // disabling
                if(value < min) {
                    cell.className = disabledCls;
                    cell.title = me.minText;
                    return;
                }
                if(value > max) {
                    cell.className = disabledCls;
                    cell.title = me.maxText;
                    return;
                }
                if(ddays){
                    if(ddays.indexOf(current.getDay()) != -1){
                        cell.title = ddaysText;
                        cell.className = disabledCls;
                    }
                }
                if(ddMatch && format){
                    formatValue = eDate.dateFormat(current, format);
                    if(ddMatch.test(formatValue)){
                        cell.title = ddText.replace('%0', formatValue);
                        cell.className = disabledCls;
                    }
                }
            };

            for(; i < me.numDays; ++i) {
                if (i < startingPos) {
                    html = (++prevStart);
                    cls = me.prevCls;
                } else if (i >= days) {
                    html = (++extraDays);
                    cls = me.nextCls;
                } else {
                    html = i - startingPos + 1;
                    cls = me.activeCls;
                }
                textNodes[i].innerHTML = html;
                cells[i].className = cls;
                current.setDate(current.getDate() + 1);
                setCellClass(cells[i]);
            }

            me.monthBtn.setText(me.monthNames[date.getMonth()] + ' ' + date.getFullYear());
        },

        /**
         * Update the contents of the picker
         * @private
         * @param {Date} date The new date
         * @param {Boolean} forceRefresh True to force a full refresh
         */
        update : function(date, forceRefresh){
            var me = this,
                active = me.activeDate;

            if (me.rendered) {
                me.activeDate = date;
                if(!forceRefresh && active && me.el && active.getMonth() == date.getMonth() && active.getFullYear() == date.getFullYear()){
                    me.selectedUpdate(date, active);
                } else {
                    me.fullUpdate(date, active);
                }
            }
            return me;
        },

        // private, inherit docs
        beforeDestroy : function() {
            var me = this;

            if (me.rendered) {
                Ext.destroy(
                    me.todayKeyListener,
                    me.keyNav,
                    me.monthPicker,
                    me.monthBtn,
                    me.nextRepeater,
                    me.prevRepeater,
                    me.todayBtn
                );
                delete me.textNodes;
                delete me.cells.elements;
            }
        },

        // private, inherit docs
        onShow: function() {
            this.callParent(arguments);
            if (this.focusOnShow) {
                this.focus();
            }
        }
    },

    // After dependencies have loaded:
    function() {
        var proto = this.prototype;

        proto.monthNames = Ext.Date.monthNames;

        proto.dayNames = Ext.Date.dayNames;

        proto.format = Ext.Date.defaultFormat;
    });