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app/assets/javascripts/lib/jquery-ui-timepicker-addon.js

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/*
* jQuery timepicker addon
* By: Trent Richardson [http://trentrichardson.com]
* Version 0.9.5
* Last Modified: 05/25/2011
* 
* Copyright 2011 Trent Richardson
* Dual licensed under the MIT and GPL licenses.
* http://trentrichardson.com/Impromptu/GPL-LICENSE.txt
* http://trentrichardson.com/Impromptu/MIT-LICENSE.txt
* 
* HERES THE CSS:
* .ui-timepicker-div .ui-widget-header{ margin-bottom: 8px; }
* .ui-timepicker-div dl{ text-align: left; }
* .ui-timepicker-div dl dt{ height: 25px; }
* .ui-timepicker-div dl dd{ margin: -25px 10px 10px 65px; }
* .ui-timepicker-div td { font-size: 90%; }
*/

(function($) {

$.extend($.ui, { timepicker: { version: "0.9.5" } });

/* Time picker manager.
   Use the singleton instance of this class, $.timepicker, to interact with the time picker.
   Settings for (groups of) time pickers are maintained in an instance object,
   allowing multiple different settings on the same page. */

function Timepicker() {
    this.regional = []; // Available regional settings, indexed by language code
    this.regional[''] = { // Default regional settings
        currentText: 'Now',
        closeText: 'Done',
        ampm: false,
        timeFormat: 'hh:mm tt',
        timeOnlyTitle: 'Choose Time',
        timeText: 'Time',
        hourText: 'Hour',
        minuteText: 'Minute',
        secondText: 'Second',
        timezoneText: 'Time Zone'
    };
    this._defaults = { // Global defaults for all the datetime picker instances
        showButtonPanel: true,
        timeOnly: false,
        showHour: true,
        showMinute: true,
        showSecond: false,
        showTimezone: false,
        showTime: true,
        stepHour: 0.05,
        stepMinute: 0.05,
        stepSecond: 0.05,
        hour: 0,
        minute: 0,
        second: 0,
        timezone: '+0000',
        hourMin: 0,
        minuteMin: 0,
        secondMin: 0,
        hourMax: 23,
        minuteMax: 59,
        secondMax: 59,
        minDateTime: null,
        maxDateTime: null,
        hourGrid: 0,
        minuteGrid: 0,
        secondGrid: 0,
        alwaysSetTime: true,
        separator: ' ',
        altFieldTimeOnly: true,
        showTimepicker: true,
        timezoneList: ["-1100", "-1000", "-0900", "-0800", "-0700", "-0600",
                   "-0500", "-0400", "-0300", "-0200", "-0100", "+0000",
                   "+0100", "+0200", "+0300", "+0400", "+0500", "+0600",
                   "+0700", "+0800", "+0900", "+1000", "+1100", "+1200"]
    };
    $.extend(this._defaults, this.regional['']);
}

$.extend(Timepicker.prototype, {
    $input: null,
    $altInput: null,
    $timeObj: null,
    inst: null,
    hour_slider: null,
    minute_slider: null,
    second_slider: null,
    timezone_select: null,
    hour: 0,
    minute: 0,
    second: 0,
    timezone: '+0000',
    hourMinOriginal: null,
    minuteMinOriginal: null,
    secondMinOriginal: null,
    hourMaxOriginal: null,
    minuteMaxOriginal: null,
    secondMaxOriginal: null,
    ampm: '',
    formattedDate: '',
    formattedTime: '',
    formattedDateTime: '',
    timezoneList: ["-1100", "-1000", "-0900", "-0800", "-0700", "-0600",
            "-0500", "-0400", "-0300", "-0200", "-0100", "+0000",
            "+0100", "+0200", "+0300", "+0400", "+0500", "+0600",
            "+0700", "+0800", "+0900", "+1000", "+1100", "+1200"],

    /* Override the default settings for all instances of the time picker.
       @param  settings  object - the new settings to use as defaults (anonymous object)
       @return the manager object */
    setDefaults: function(settings) {
        extendRemove(this._defaults, settings || {});
        return this;
    },

    //########################################################################
    // Create a new Timepicker instance
    //########################################################################
    _newInst: function($input, o) {
        var tp_inst = new Timepicker(),
            inlineSettings = {};
            
        for (var attrName in this._defaults) {
            var attrValue = $input.attr('time:' + attrName);
            if (attrValue) {
                try {
                    inlineSettings[attrName] = eval(attrValue);
                } catch (err) {
                    inlineSettings[attrName] = attrValue;
                }
            }
        }
        tp_inst._defaults = $.extend({}, this._defaults, inlineSettings, o, {
            beforeShow: function(input, dp_inst) {
                if ($.isFunction(o.beforeShow))
                    o.beforeShow(input, dp_inst, tp_inst);
            },
            onChangeMonthYear: function(year, month, dp_inst) {
                // Update the time as well : this prevents the time from disappearing from the $input field.
                tp_inst._updateDateTime(dp_inst);
                if ($.isFunction(o.onChangeMonthYear))
                    o.onChangeMonthYear.call($input[0], year, month, dp_inst, tp_inst);
            },
            onClose: function(dateText, dp_inst) {
                if (tp_inst.timeDefined === true && $input.val() != '')
                    tp_inst._updateDateTime(dp_inst);
                if ($.isFunction(o.onClose))
                    o.onClose.call($input[0], dateText, dp_inst, tp_inst);
            },
            timepicker: tp_inst // add timepicker as a property of datepicker: $.datepicker._get(dp_inst, 'timepicker');
        });

        tp_inst.hour = tp_inst._defaults.hour;
        tp_inst.minute = tp_inst._defaults.minute;
        tp_inst.second = tp_inst._defaults.second;
        tp_inst.ampm = '';
        tp_inst.$input = $input;

        if (o.altField)
            tp_inst.$altInput = $(o.altField)
                .css({ cursor: 'pointer' })
                .focus(function(){ $input.trigger("focus"); });
                        
        // datepicker needs minDate/maxDate, timepicker needs minDateTime/maxDateTime..
        if(tp_inst._defaults.minDate !== undefined && tp_inst._defaults.minDate instanceof Date)
            tp_inst._defaults.minDateTime = new Date(tp_inst._defaults.minDate.getTime());
        if(tp_inst._defaults.minDateTime !== undefined && tp_inst._defaults.minDateTime instanceof Date)
            tp_inst._defaults.minDate = new Date(tp_inst._defaults.minDateTime.getTime());
        if(tp_inst._defaults.maxDate !== undefined && tp_inst._defaults.maxDate instanceof Date)
            tp_inst._defaults.maxDateTime = new Date(tp_inst._defaults.maxDate.getTime());
        if(tp_inst._defaults.maxDateTime !== undefined && tp_inst._defaults.maxDateTime instanceof Date)
            tp_inst._defaults.maxDate = new Date(tp_inst._defaults.maxDateTime.getTime());
            
        return tp_inst;
    },

    //########################################################################
    // add our sliders to the calendar
    //########################################################################
    _addTimePicker: function(dp_inst) {
        var currDT = (this.$altInput && this._defaults.altFieldTimeOnly) ?
                this.$input.val() + ' ' + this.$altInput.val() : 
                this.$input.val();

        this.timeDefined = this._parseTime(currDT);
        this._limitMinMaxDateTime(dp_inst, false);
        this._injectTimePicker();
    },

    //########################################################################
    // parse the time string from input value or _setTime
    //########################################################################
    _parseTime: function(timeString, withDate) {
        var regstr = this._defaults.timeFormat.toString()
                .replace(/h{1,2}/ig, '(\\d?\\d)')
                .replace(/m{1,2}/ig, '(\\d?\\d)')
                .replace(/s{1,2}/ig, '(\\d?\\d)')
                .replace(/t{1,2}/ig, '(am|pm|a|p)?')
                .replace(/z{1}/ig, '((\\+|-)\\d\\d\\d\\d)?')
                .replace(/\s/g, '\\s?') + '$',
            order = this._getFormatPositions(),
            treg;

        if (!this.inst) this.inst = $.datepicker._getInst(this.$input[0]);

        if (withDate || !this._defaults.timeOnly) {
            // the time should come after x number of characters and a space.
            // x = at least the length of text specified by the date format
            var dp_dateFormat = $.datepicker._get(this.inst, 'dateFormat');
            // escape special regex characters in the seperator
            var specials = new RegExp("[.*+?|()\\[\\]{}\\\\]", "g");
            regstr = '.{' + dp_dateFormat.length + ',}' + this._defaults.separator.replace(specials, "\\$&") + regstr;
        }
        
        treg = timeString.match(new RegExp(regstr, 'i'));

        if (treg) {
            if (order.t !== -1)
                this.ampm = ((treg[order.t] === undefined || treg[order.t].length === 0) ?
                    '' :
                    (treg[order.t].charAt(0).toUpperCase() == 'A') ? 'AM' : 'PM').toUpperCase();

            if (order.h !== -1) {
                if (this.ampm == 'AM' && treg[order.h] == '12') 
                    this.hour = 0; // 12am = 0 hour
                else if (this.ampm == 'PM' && treg[order.h] != '12') 
                    this.hour = (parseFloat(treg[order.h]) + 12).toFixed(0); // 12pm = 12 hour, any other pm = hour + 12
                else this.hour = Number(treg[order.h]);
            }

            if (order.m !== -1) this.minute = Number(treg[order.m]);
            if (order.s !== -1) this.second = Number(treg[order.s]);
            if (order.z !== -1) this.timezone = treg[order.z];
            
            return true;

        }
        return false;
    },

    //########################################################################
    // figure out position of time elements.. cause js cant do named captures
    //########################################################################
    _getFormatPositions: function() {
        var finds = this._defaults.timeFormat.toLowerCase().match(/(h{1,2}|m{1,2}|s{1,2}|t{1,2}|z)/g),
            orders = { h: -1, m: -1, s: -1, t: -1, z: -1 };

        if (finds)
            for (var i = 0; i < finds.length; i++)
                if (orders[finds[i].toString().charAt(0)] == -1)
                    orders[finds[i].toString().charAt(0)] = i + 1;

        return orders;
    },

    //########################################################################
    // generate and inject html for timepicker into ui datepicker
    //########################################################################
    _injectTimePicker: function() {
        var $dp = this.inst.dpDiv,
            o = this._defaults,
            tp_inst = this,
            // Added by Peter Medeiros:
            // - Figure out what the hour/minute/second max should be based on the step values.
            // - Example: if stepMinute is 15, then minMax is 45.
            hourMax = (o.hourMax - (o.hourMax % o.stepHour)).toFixed(0),
            minMax  = (o.minuteMax - (o.minuteMax % o.stepMinute)).toFixed(0),
            secMax  = (o.secondMax - (o.secondMax % o.stepSecond)).toFixed(0),
            dp_id = this.inst.id.toString().replace(/([^A-Za-z0-9_])/g, '');

        // Prevent displaying twice
        //if ($dp.find("div#ui-timepicker-div-"+ dp_id).length === 0) {
        if ($dp.find("div#ui-timepicker-div-"+ dp_id).length === 0 && o.showTimepicker) {
            var noDisplay = ' style="display:none;"',
                html =    '<div class="ui-timepicker-div" id="ui-timepicker-div-' + dp_id + '"><dl>' +
                        '<dt class="ui_tpicker_time_label" id="ui_tpicker_time_label_' + dp_id + '"' +
                        ((o.showTime) ? '' : noDisplay) + '>' + o.timeText + '</dt>' +
                        '<dd class="ui_tpicker_time" id="ui_tpicker_time_' + dp_id + '"' +
                        ((o.showTime) ? '' : noDisplay) + '></dd>' +
                        '<dt class="ui_tpicker_hour_label" id="ui_tpicker_hour_label_' + dp_id + '"' +
                        ((o.showHour) ? '' : noDisplay) + '>' + o.hourText + '</dt>',
                hourGridSize = 0,
                minuteGridSize = 0,
                secondGridSize = 0,
                size;
 
            if (o.showHour && o.hourGrid > 0) {
                html += '<dd class="ui_tpicker_hour">' +
                        '<div id="ui_tpicker_hour_' + dp_id + '"' + ((o.showHour)   ? '' : noDisplay) + '></div>' +
                        '<div style="padding-left: 1px"><table><tr>';

                for (var h = o.hourMin; h < hourMax; h += o.hourGrid) {
                    hourGridSize++;
                    var tmph = (o.ampm && h > 12) ? h-12 : h;
                    if (tmph < 10) tmph = '0' + tmph;
                    if (o.ampm) {
                        if (h == 0) tmph = 12 +'a';
                        else if (h < 12) tmph += 'a';
                        else tmph += 'p';
                    }
                    html += '<td>' + tmph + '</td>';
                }

                html += '</tr></table></div>' +
                        '</dd>';
            } else html += '<dd class="ui_tpicker_hour" id="ui_tpicker_hour_' + dp_id + '"' +
                            ((o.showHour) ? '' : noDisplay) + '></dd>';

            html += '<dt class="ui_tpicker_minute_label" id="ui_tpicker_minute_label_' + dp_id + '"' +
                    ((o.showMinute) ? '' : noDisplay) + '>' + o.minuteText + '</dt>';

            if (o.showMinute && o.minuteGrid > 0) {
                html += '<dd class="ui_tpicker_minute ui_tpicker_minute_' + o.minuteGrid + '">' +
                        '<div id="ui_tpicker_minute_' + dp_id + '"' +
                        ((o.showMinute) ? '' : noDisplay) + '></div>' +
                        '<div style="padding-left: 1px"><table><tr>';

                for (var m = o.minuteMin; m < minMax; m += o.minuteGrid) {
                    minuteGridSize++;
                    html += '<td>' + ((m < 10) ? '0' : '') + m + '</td>';
                }

                html += '</tr></table></div>' +
                        '</dd>';
            } else html += '<dd class="ui_tpicker_minute" id="ui_tpicker_minute_' + dp_id + '"' +
                            ((o.showMinute) ? '' : noDisplay) + '></dd>';

            html += '<dt class="ui_tpicker_second_label" id="ui_tpicker_second_label_' + dp_id + '"' +
                    ((o.showSecond) ? '' : noDisplay) + '>' + o.secondText + '</dt>';

            if (o.showSecond && o.secondGrid > 0) {
                html += '<dd class="ui_tpicker_second ui_tpicker_second_' + o.secondGrid + '">' +
                        '<div id="ui_tpicker_second_' + dp_id + '"' +
                        ((o.showSecond) ? '' : noDisplay) + '></div>' +
                        '<div style="padding-left: 1px"><table><tr>';

                for (var s = o.secondMin; s < secMax; s += o.secondGrid) {
                    secondGridSize++;
                    html += '<td>' + ((s < 10) ? '0' : '') + s + '</td>';
                }

                html += '</tr></table></div>' +
                        '</dd>';
            } else html += '<dd class="ui_tpicker_second" id="ui_tpicker_second_' + dp_id + '"'    +
                            ((o.showSecond) ? '' : noDisplay) + '></dd>';
                            
            html += '<dt class="ui_tpicker_timezone_label" id="ui_tpicker_timezone_label_' + dp_id + '"' +
                    ((o.showTimezone) ? '' : noDisplay) + '>' + o.timezoneText + '</dt>';
            html += '<dd class="ui_tpicker_timezone" id="ui_tpicker_timezone_' + dp_id + '"'    +
                            ((o.showTimezone) ? '' : noDisplay) + '></dd>';

            html += '</dl></div>';
            $tp = $(html);

                // if we only want time picker...
            if (o.timeOnly === true) {
                $tp.prepend(
                    '<div class="ui-widget-header ui-helper-clearfix ui-corner-all">' +
                        '<div class="ui-datepicker-title">' + o.timeOnlyTitle + '</div>' +
                    '</div>');
                $dp.find('.ui-datepicker-header, .ui-datepicker-calendar').hide();
            }

            this.hour_slider = $tp.find('#ui_tpicker_hour_'+ dp_id).slider({
                orientation: "horizontal",
                value: this.hour,
                min: o.hourMin,
                max: hourMax,
                step: o.stepHour,
                slide: function(event, ui) {
                    tp_inst.hour_slider.slider( "option", "value", ui.value);
                    tp_inst._onTimeChange();
                }
            });

            // Updated by Peter Medeiros:
            // - Pass in Event and UI instance into slide function
            this.minute_slider = $tp.find('#ui_tpicker_minute_'+ dp_id).slider({
                orientation: "horizontal",
                value: this.minute,
                min: o.minuteMin,
                max: minMax,
                step: o.stepMinute,
                slide: function(event, ui) {
                    // update the global minute slider instance value with the current slider value
                    tp_inst.minute_slider.slider( "option", "value", ui.value);
                    tp_inst._onTimeChange();
                }
            });

            this.second_slider = $tp.find('#ui_tpicker_second_'+ dp_id).slider({
                orientation: "horizontal",
                value: this.second,
                min: o.secondMin,
                max: secMax,
                step: o.stepSecond,
                slide: function(event, ui) {
                    tp_inst.second_slider.slider( "option", "value", ui.value);
                    tp_inst._onTimeChange();
                }
            });
            
            
            this.timezone_select = $tp.find('#ui_tpicker_timezone_'+ dp_id).append('<select></select>').find("select");
            $.fn.append.apply(this.timezone_select,
                $.map(o.timezoneList, function(val, idx) {
                    return $("<option />")
                        .val(typeof val == "object" ? val.value : val)
                        .text(typeof val == "object" ? val.label : val);
                })
            );
            this.timezone_select.val((typeof this.timezone != "undefined" && this.timezone != null && this.timezone != "") ? this.timezone : o.timezone);
            this.timezone_select.change(function() {
                tp_inst._onTimeChange();
            });

            // Add grid functionality
            if (o.showHour && o.hourGrid > 0) {
                size = 100 * hourGridSize * o.hourGrid / (hourMax - o.hourMin);

                $tp.find(".ui_tpicker_hour table").css({
                    width: size + "%",
                    marginLeft: (size / (-2 * hourGridSize)) + "%",
                    borderCollapse: 'collapse'
                }).find("td").each( function(index) {
                    $(this).click(function() {
                        var h = $(this).html();
                        if(o.ampm)    {
                            var ap = h.substring(2).toLowerCase(),
                                aph = parseInt(h.substring(0,2));
                            if (ap == 'a') {
                                if (aph == 12) h = 0;
                                else h = aph;
                            } else if (aph == 12) h = 12;
                            else h = aph + 12;
                        }
                        tp_inst.hour_slider.slider("option", "value", h);
                        tp_inst._onTimeChange();
                        tp_inst._onSelectHandler();
                    }).css({
                        cursor: 'pointer',
                        width: (100 / hourGridSize) + '%',
                        textAlign: 'center',
                        overflow: 'hidden'
                    });
                });
            }

            if (o.showMinute && o.minuteGrid > 0) {
                size = 100 * minuteGridSize * o.minuteGrid / (minMax - o.minuteMin);
                $tp.find(".ui_tpicker_minute table").css({
                    width: size + "%",
                    marginLeft: (size / (-2 * minuteGridSize)) + "%",
                    borderCollapse: 'collapse'
                }).find("td").each(function(index) {
                    $(this).click(function() {
                        tp_inst.minute_slider.slider("option", "value", $(this).html());
                        tp_inst._onTimeChange();
                        tp_inst._onSelectHandler();
                    }).css({
                        cursor: 'pointer',
                        width: (100 / minuteGridSize) + '%',
                        textAlign: 'center',
                        overflow: 'hidden'
                    });
                });
            }

            if (o.showSecond && o.secondGrid > 0) {
                $tp.find(".ui_tpicker_second table").css({
                    width: size + "%",
                    marginLeft: (size / (-2 * secondGridSize)) + "%",
                    borderCollapse: 'collapse'
                }).find("td").each(function(index) {
                    $(this).click(function() {
                        tp_inst.second_slider.slider("option", "value", $(this).html());
                        tp_inst._onTimeChange();
                        tp_inst._onSelectHandler();
                    }).css({
                        cursor: 'pointer',
                        width: (100 / secondGridSize) + '%',
                        textAlign: 'center',
                        overflow: 'hidden'
                    });
                });
            }

            var $buttonPanel = $dp.find('.ui-datepicker-buttonpane');
            if ($buttonPanel.length) $buttonPanel.before($tp);
            else $dp.append($tp);

            this.$timeObj = $tp.find('#ui_tpicker_time_'+ dp_id);

            if (this.inst !== null) {
                var timeDefined = this.timeDefined;
                this._onTimeChange();
                this.timeDefined = timeDefined;
            }

            //Emulate datepicker onSelect behavior. Call on slidestop.
            var onSelectDelegate = function() {
                tp_inst._onSelectHandler();
            };
            this.hour_slider.bind('slidestop',onSelectDelegate);
            this.minute_slider.bind('slidestop',onSelectDelegate);
            this.second_slider.bind('slidestop',onSelectDelegate);
        }
    },

    //########################################################################
    // This function tries to limit the ability to go outside the 
    // min/max date range
    //########################################################################
    _limitMinMaxDateTime: function(dp_inst, adjustSliders){
        var o = this._defaults,
            dp_date = new Date(dp_inst.selectedYear, dp_inst.selectedMonth, dp_inst.selectedDay);

        if(!this._defaults.showTimepicker) return; // No time so nothing to check here

        if(this._defaults.minDateTime !== null && dp_date){
            var minDateTime = this._defaults.minDateTime,
                minDateTimeDate = new Date(minDateTime.getFullYear(), minDateTime.getMonth(), minDateTime.getDate(), 0, 0, 0, 0);

            if(this.hourMinOriginal === null || this.minuteMinOriginal === null || this.secondMinOriginal === null){
                this.hourMinOriginal = o.hourMin;
                this.minuteMinOriginal = o.minuteMin;
                this.secondMinOriginal = o.secondMin;
            }

            if(dp_inst.settings.timeOnly || minDateTimeDate.getTime() == dp_date.getTime()) {
                this._defaults.hourMin = minDateTime.getHours();
                if (this.hour <= this._defaults.hourMin) {
                    this.hour = this._defaults.hourMin;
                    this._defaults.minuteMin = minDateTime.getMinutes();
                    if (this.minute <= this._defaults.minuteMin) {
                        this.minute = this._defaults.minuteMin;
                        this._defaults.secondMin = minDateTime.getSeconds();
                    } else {
                        if(this.second < this._defaults.secondMin) this.second = this._defaults.secondMin;
                        this._defaults.secondMin = this.secondMinOriginal;
                    }
                } else {
                    this._defaults.minuteMin = this.minuteMinOriginal;
                    this._defaults.secondMin = this.secondMinOriginal;
                }
            }else{
                this._defaults.hourMin = this.hourMinOriginal;
                this._defaults.minuteMin = this.minuteMinOriginal;
                this._defaults.secondMin = this.secondMinOriginal;
            }
        }

        if(this._defaults.maxDateTime !== null && dp_date){
            var maxDateTime = this._defaults.maxDateTime,
                maxDateTimeDate = new Date(maxDateTime.getFullYear(), maxDateTime.getMonth(), maxDateTime.getDate(), 0, 0, 0, 0);
    
            if(this.hourMaxOriginal === null || this.minuteMaxOriginal === null || this.secondMaxOriginal === null){
                this.hourMaxOriginal = o.hourMax;
                this.minuteMaxOriginal = o.minuteMax;
                this.secondMaxOriginal = o.secondMax;
            }

            if(dp_inst.settings.timeOnly || maxDateTimeDate.getTime() == dp_date.getTime()){
                this._defaults.hourMax = maxDateTime.getHours();
                if (this.hour >= this._defaults.hourMax) {
                    this.hour = this._defaults.hourMax;
                    this._defaults.minuteMax = maxDateTime.getMinutes();
                    if (this.minute >= this._defaults.minuteMax) {
                        this.minute = this._defaults.minuteMax;
                        this._defaults.secondMin = maxDateTime.getSeconds();
                    } else {
                        if(this.second > this._defaults.secondMax) this.second = this._defaults.secondMax;
                        this._defaults.secondMax = this.secondMaxOriginal;
                    }
                } else {
                    this._defaults.minuteMax = this.minuteMaxOriginal;
                    this._defaults.secondMax = this.secondMaxOriginal;
                }
            }else{
                this._defaults.hourMax = this.hourMaxOriginal;
                this._defaults.minuteMax = this.minuteMaxOriginal;
                this._defaults.secondMax = this.secondMaxOriginal;
            }
        }

        if(adjustSliders !== undefined && adjustSliders === true){
            this.hour_slider.slider("option", { min: this._defaults.hourMin, max: this._defaults.hourMax }).slider('value', this.hour);
            this.minute_slider.slider("option", { min: this._defaults.minuteMin, max: this._defaults.minuteMax }).slider('value', this.minute);
            this.second_slider.slider("option", { min: this._defaults.secondMin, max: this._defaults.secondMax }).slider('value', this.second);
        }

    },

    
    //########################################################################
    // when a slider moves, set the internal time...
    // on time change is also called when the time is updated in the text field
    //########################################################################
    _onTimeChange: function() {
        var hour   = (this.hour_slider) ? this.hour_slider.slider('value') : false,
            minute = (this.minute_slider) ? this.minute_slider.slider('value') : false,
            second = (this.second_slider) ? this.second_slider.slider('value') : false,
            timezone = (this.timezone_select) ? this.timezone_select.val() : false;
        
        if (hour !== false) hour = parseInt(hour,10);
        if (minute !== false) minute = parseInt(minute,10);
        if (second !== false) second = parseInt(second,10);

        var ampm = (hour < 12) ? 'AM' : 'PM';
            
        // If the update was done in the input field, the input field should not be updated.
        // If the update was done using the sliders, update the input field.
        var hasChanged = (hour != this.hour || minute != this.minute || second != this.second || (this.ampm.length > 0 && this.ampm != ampm) || timezone != this.timezone);
        
        if (hasChanged) {

            if (hour !== false)this.hour = hour;
            if (minute !== false) this.minute = minute;
            if (second !== false) this.second = second;
            if (timezone !== false) this.timezone = timezone;
            this._limitMinMaxDateTime(this.inst, true);
        }
        if (this._defaults.ampm) this.ampm = ampm;
        
        this._formatTime();
        if (this.$timeObj) this.$timeObj.text(this.formattedTime);
        this.timeDefined = true;
        if (hasChanged) this._updateDateTime();
    },
    
    //########################################################################
    // call custom onSelect. 
    // bind to sliders slidestop, and grid click.
    //########################################################################
    _onSelectHandler: function() {
        var onSelect = this._defaults['onSelect'];
        var inputEl = this.$input ? this.$input[0] : null;
        if (onSelect && inputEl) {
            onSelect.apply(inputEl, [this.formattedDateTime, this]);
        }
    },

    //########################################################################
    // format the time all pretty...
    //########################################################################
    _formatTime: function(time, format, ampm) {
        if (ampm == undefined) ampm = this._defaults.ampm;
        time = time || { hour: this.hour, minute: this.minute, second: this.second, ampm: this.ampm, timezone: this.timezone };
        var tmptime = format || this._defaults.timeFormat.toString();

        if (ampm) {
            var hour12 = ((time.ampm == 'AM') ? (time.hour) : (time.hour % 12));
            hour12 = (Number(hour12) === 0) ? 12 : hour12;
            tmptime = tmptime.toString()
                .replace(/hh/g, ((hour12 < 10) ? '0' : '') + hour12)
                .replace(/h/g, hour12)
                .replace(/mm/g, ((time.minute < 10) ? '0' : '') + time.minute)
                .replace(/m/g, time.minute)
                .replace(/ss/g, ((time.second < 10) ? '0' : '') + time.second)
                .replace(/s/g, time.second)
                .replace(/TT/g, time.ampm.toUpperCase())
                .replace(/Tt/g, time.ampm.toUpperCase())
                .replace(/tT/g, time.ampm.toLowerCase())
                .replace(/tt/g, time.ampm.toLowerCase())
                .replace(/T/g, time.ampm.charAt(0).toUpperCase())
                .replace(/t/g, time.ampm.charAt(0).toLowerCase())
                .replace(/z/g, time.timezone);
        } else {
            tmptime = tmptime.toString()
                .replace(/hh/g, ((time.hour < 10) ? '0' : '') + time.hour)
                .replace(/h/g, time.hour)
                .replace(/mm/g, ((time.minute < 10) ? '0' : '') + time.minute)
                .replace(/m/g, time.minute)
                .replace(/ss/g, ((time.second < 10) ? '0' : '') + time.second)
                .replace(/s/g, time.second)
                .replace(/z/g, time.timezone);
            tmptime = $.trim(tmptime.replace(/t/gi, ''));
        }

        if (arguments.length) return tmptime;
        else this.formattedTime = tmptime;
    },

    //########################################################################
    // update our input with the new date time..
    //########################################################################
    _updateDateTime: function(dp_inst) {
        dp_inst = this.inst || dp_inst,
            dt = new Date(dp_inst.selectedYear, dp_inst.selectedMonth, dp_inst.selectedDay),
            dateFmt = $.datepicker._get(dp_inst, 'dateFormat'),
            formatCfg = $.datepicker._getFormatConfig(dp_inst),
            timeAvailable = dt !== null && this.timeDefined;
        this.formattedDate = $.datepicker.formatDate(dateFmt, (dt === null ? new Date() : dt), formatCfg);
        var formattedDateTime = this.formattedDate;
        if (dp_inst.lastVal !== undefined && (dp_inst.lastVal.length > 0 && this.$input.val().length === 0))
            return;

        if (this._defaults.timeOnly === true) {
            formattedDateTime = this.formattedTime;
        } else if (this._defaults.timeOnly !== true && (this._defaults.alwaysSetTime || timeAvailable)) {
            formattedDateTime += this._defaults.separator + this.formattedTime;
        }

        this.formattedDateTime = formattedDateTime;

        if(!this._defaults.showTimepicker) {
            this.$input.val(this.formattedDate);
        } else if (this.$altInput && this._defaults.altFieldTimeOnly === true) {
            this.$altInput.val(this.formattedTime);
            this.$input.val(this.formattedDate);
        } else if(this.$altInput) {
            this.$altInput.val(formattedDateTime);
            this.$input.val(formattedDateTime);
        } else {
            this.$input.val(formattedDateTime);
        }
        
        this.$input.trigger("change");
    }

});

$.fn.extend({
    //########################################################################
    // shorthand just to use timepicker..
    //########################################################################
    timepicker: function(o) {
        o = o || {};
        var tmp_args = arguments;

        if (typeof o == 'object') tmp_args[0] = $.extend(o, { timeOnly: true });

        return $(this).each(function() {
            $.fn.datetimepicker.apply($(this), tmp_args);
        });
    },

    //########################################################################
    // extend timepicker to datepicker
    //########################################################################
    datetimepicker: function(o) {
        o = o || {};
        var $input = this,
        tmp_args = arguments;

        if (typeof(o) == 'string'){
            if(o == 'getDate') 
                return $.fn.datepicker.apply($(this[0]), tmp_args);
            else 
                return this.each(function() {
                    var $t = $(this);
                    $t.datepicker.apply($t, tmp_args);
                });
        }
        else
            return this.each(function() {
                var $t = $(this);
                $t.datepicker($.timepicker._newInst($t, o)._defaults);
            });
    }
});

//########################################################################
// the bad hack :/ override datepicker so it doesnt close on select
// inspired: http://stackoverflow.com/questions/1252512/jquery-datepicker-prevent-closing-picker-when-clicking-a-date/1762378#1762378
//########################################################################
$.datepicker._base_selectDate = $.datepicker._selectDate;
$.datepicker._selectDate = function (id, dateStr) {
    var inst = this._getInst($(id)[0]),
        tp_inst = this._get(inst, 'timepicker');

    if (tp_inst) {
        tp_inst._limitMinMaxDateTime(inst, true);
        inst.inline = inst.stay_open = true;
        //This way the onSelect handler called from calendarpicker get the full dateTime
        this._base_selectDate(id, dateStr + tp_inst._defaults.separator + tp_inst.formattedTime);
        inst.inline = inst.stay_open = false;
        this._notifyChange(inst);
        this._updateDatepicker(inst);
    }
    else this._base_selectDate(id, dateStr);
};

//#############################################################################################
// second bad hack :/ override datepicker so it triggers an event when changing the input field
// and does not redraw the datepicker on every selectDate event
//#############################################################################################
$.datepicker._base_updateDatepicker = $.datepicker._updateDatepicker;
$.datepicker._updateDatepicker = function(inst) {
    if (typeof(inst.stay_open) !== 'boolean' || inst.stay_open === false) {
                
        this._base_updateDatepicker(inst);
        
        // Reload the time control when changing something in the input text field.
        var tp_inst = this._get(inst, 'timepicker');
        if(tp_inst) tp_inst._addTimePicker(inst);
    }
};

//#######################################################################################
// third bad hack :/ override datepicker so it allows spaces and colan in the input field
//#######################################################################################
$.datepicker._base_doKeyPress = $.datepicker._doKeyPress;
$.datepicker._doKeyPress = function(event) {
    var inst = $.datepicker._getInst(event.target),
        tp_inst = $.datepicker._get(inst, 'timepicker');

    if (tp_inst) {
        if ($.datepicker._get(inst, 'constrainInput')) {
            var ampm = tp_inst._defaults.ampm,
                datetimeChars = tp_inst._defaults.timeFormat.toString()
                                .replace(/[hms]/g, '')
                                .replace(/TT/g, ampm ? 'APM' : '')
                                .replace(/Tt/g, ampm ? 'AaPpMm' : '')
                                .replace(/tT/g, ampm ? 'AaPpMm' : '')
                                .replace(/T/g, ampm ? 'AP' : '')
                                .replace(/tt/g, ampm ? 'apm' : '')
                                .replace(/t/g, ampm ? 'ap' : '') +
                                " " +
                                tp_inst._defaults.separator +
                                $.datepicker._possibleChars($.datepicker._get(inst, 'dateFormat')),
                chr = String.fromCharCode(event.charCode === undefined ? event.keyCode : event.charCode);
            return event.ctrlKey || (chr < ' ' || !datetimeChars || datetimeChars.indexOf(chr) > -1);
        }
    }
    
    return $.datepicker._base_doKeyPress(event);
};

//#######################################################################################
// Override key up event to sync manual input changes.
//#######################################################################################
$.datepicker._base_doKeyUp = $.datepicker._doKeyUp;
$.datepicker._doKeyUp = function (event) {
    var inst = $.datepicker._getInst(event.target),
        tp_inst = $.datepicker._get(inst, 'timepicker');

    if (tp_inst) {
        if (tp_inst._defaults.timeOnly && (inst.input.val() != inst.lastVal)) {
            try {
                $.datepicker._updateDatepicker(inst);
            }
            catch (err) {
                $.datepicker.log(err);
            }
        }
    }

    return $.datepicker._base_doKeyUp(event);
};

//#######################################################################################
// override "Today" button to also grab the time.
//#######################################################################################
$.datepicker._base_gotoToday = $.datepicker._gotoToday;
$.datepicker._gotoToday = function(id) {
    this._base_gotoToday(id);
    this._setTime(this._getInst($(id)[0]), new Date());
};

//#######################################################################################
// Disable & enable the Time in the datetimepicker
//#######################################################################################
$.datepicker._disableTimepickerDatepicker = function(target, date, withDate) {
    var inst = this._getInst(target),
    tp_inst = this._get(inst, 'timepicker');
    $(target).datepicker('getDate'); // Init selected[Year|Month|Day]
    if (tp_inst) {
        tp_inst._defaults.showTimepicker = false;
        tp_inst._updateDateTime(inst);
    }
};

$.datepicker._enableTimepickerDatepicker = function(target, date, withDate) {
    var inst = this._getInst(target),
    tp_inst = this._get(inst, 'timepicker');
    $(target).datepicker('getDate'); // Init selected[Year|Month|Day]
    if (tp_inst) {
        tp_inst._defaults.showTimepicker = true;
        tp_inst._addTimePicker(inst); // Could be disabled on page load
        tp_inst._updateDateTime(inst);
    }
};

//#######################################################################################
// Create our own set time function
//#######################################################################################
$.datepicker._setTime = function(inst, date) {
    var tp_inst = this._get(inst, 'timepicker');
    if (tp_inst) {
        var defaults = tp_inst._defaults,
            // calling _setTime with no date sets time to defaults
            hour = date ? date.getHours() : defaults.hour,
            minute = date ? date.getMinutes() : defaults.minute,
            second = date ? date.getSeconds() : defaults.second;

        //check if within min/max times..
        if ((hour < defaults.hourMin || hour > defaults.hourMax) || (minute < defaults.minuteMin || minute > defaults.minuteMax) || (second < defaults.secondMin || second > defaults.secondMax)) {
            hour = defaults.hourMin;
            minute = defaults.minuteMin;
            second = defaults.secondMin;
        }

        if (tp_inst.hour_slider) tp_inst.hour_slider.slider('value', hour);
        else tp_inst.hour = hour;
        if (tp_inst.minute_slider) tp_inst.minute_slider.slider('value', minute);
        else tp_inst.minute = minute;
        if (tp_inst.second_slider) tp_inst.second_slider.slider('value', second);
        else tp_inst.second = second;

        tp_inst._onTimeChange();
        tp_inst._updateDateTime(inst);
    }
};

//#######################################################################################
// Create new public method to set only time, callable as $().datepicker('setTime', date)
//#######################################################################################
$.datepicker._setTimeDatepicker = function(target, date, withDate) {
    var inst = this._getInst(target),
        tp_inst = this._get(inst, 'timepicker');

    if (tp_inst) {
        this._setDateFromField(inst);
        var tp_date;
        if (date) {
            if (typeof date == "string") {
                tp_inst._parseTime(date, withDate);
                tp_date = new Date();
                tp_date.setHours(tp_inst.hour, tp_inst.minute, tp_inst.second);
            }
            else tp_date = new Date(date.getTime());
            if (tp_date.toString() == 'Invalid Date') tp_date = undefined;
            this._setTime(inst, tp_date);
        }
    }

};

//#######################################################################################
// override setDate() to allow setting time too within Date object
//#######################################################################################
$.datepicker._base_setDateDatepicker = $.datepicker._setDateDatepicker;
$.datepicker._setDateDatepicker = function(target, date) {
    var inst = this._getInst(target),
    tp_date = (date instanceof Date) ? new Date(date.getTime()) : date;

    this._updateDatepicker(inst);
    this._base_setDateDatepicker.apply(this, arguments);
    this._setTimeDatepicker(target, tp_date, true);
};

//#######################################################################################
// override getDate() to allow getting time too within Date object
//#######################################################################################
$.datepicker._base_getDateDatepicker = $.datepicker._getDateDatepicker;
$.datepicker._getDateDatepicker = function(target, noDefault) {
    var inst = this._getInst(target),
        tp_inst = this._get(inst, 'timepicker');

    if (tp_inst) {
        this._setDateFromField(inst, noDefault);
        var date = this._getDate(inst);
        if (date && tp_inst._parseTime($(target).val(), tp_inst.timeOnly)) date.setHours(tp_inst.hour, tp_inst.minute, tp_inst.second);
        return date;
    }
    return this._base_getDateDatepicker(target, noDefault);
};

//#######################################################################################
// jQuery extend now ignores nulls!
//#######################################################################################
function extendRemove(target, props) {
    $.extend(target, props);
    for (var name in props)
        if (props[name] === null || props[name] === undefined)
            target[name] = props[name];
    return target;
}

$.timepicker = new Timepicker(); // singleton instance
$.timepicker.version = "0.9.5";

})(jQuery);