/*!jQuery Knob*/
/**
 * Downward compatible, touchable dial
 *
 * Version: 1.2.13
 * Requires: jQuery v1.7+
 *
 * Copyright (c) 2012 Anthony Terrien
 * Under MIT License (http://www.opensource.org/licenses/mit-license.php)
 *
 * Thanks to vor, eskimoblood, spiffistan, FabrizioC
 */
(function (factory) {
    if (typeof exports === 'object') {
        // CommonJS
        module.exports = factory(require('jquery'));
    } else if (typeof define === 'function' && define.amd) {
        // AMD. Register as an anonymous module.
        define(['jquery'], factory);
    } else {
        // Browser globals
        factory(jQuery);
    }
}(function ($) {

    /**
     * Kontrol library
     */
    "use strict";

    /**
     * Definition of globals and core
     */
    var k = {}, // kontrol
        max = Math.max,
        min = Math.min;

    k.c = {};
    k.c.d = $(document);
    k.c.t = function (e) {
        return e.originalEvent.touches.length - 1;
    };

    /**
     * Kontrol Object
     *
     * Definition of an abstract UI control
     *
     * Each concrete component must call this one.
     * <code>
     * k.o.call(this);
     * </code>
     */
    k.o = function () {
        var s = this;

        this.o = null; // array of options
        this.$ = null; // jQuery wrapped element
        this.i = null; // mixed HTMLInputElement or array of HTMLInputElement
        this.g = null; // deprecated 2D graphics context for 'pre-rendering'
        this.v = null; // value ; mixed array or integer
        this.cv = null; // change value ; not commited value
        this.x = 0; // canvas x position
        this.y = 0; // canvas y position
        this.w = 0; // canvas width
        this.h = 0; // canvas height
        this.$c = null; // jQuery canvas element
        this.c = null; // rendered canvas context
        this.t = 0; // touches index
        this.isInit = false;
        this.fgColor = null; // main color
        this.pColor = null; // previous color
        this.dH = null; // draw hook
        this.cH = null; // change hook
        this.eH = null; // cancel hook
        this.rH = null; // release hook
        this.scale = 1; // scale factor
        this.relative = false;
        this.relativeWidth = false;
        this.relativeHeight = false;
        this.$div = null; // component div

        this.run = function () {
            var cf = function (e, conf) {
                var k;
                for (k in conf) {
                    s.o[k] = conf[k];
                }
                s._carve().init();
                s._configure()
                 ._draw();
            };

            if (this.$.data('kontroled')) return;
            this.$.data('kontroled', true);

            this.extend();
            this.o = $.extend({
                    // Config
                    min: this.$.data('min') !== undefined ? this.$.data('min') : 0,
                    max: this.$.data('max') !== undefined ? this.$.data('max') : 100,
                    stopper: true,
                    readOnly: this.$.data('readonly') || (this.$.attr('readonly') === 'readonly'),

                    // UI
                    cursor: this.$.data('cursor') === true && 30
                            || this.$.data('cursor') || 0,
                    thickness: this.$.data('thickness')
                               && Math.max(Math.min(this.$.data('thickness'), 1), 0.01)
                               || 0.35,
                    lineCap: this.$.data('linecap') || 'butt',
                    width: this.$.data('width') || 200,
                    height: this.$.data('height') || 200,
                    displayInput: this.$.data('displayinput') == null || this.$.data('displayinput'),
                    displayPrevious: this.$.data('displayprevious'),
                    fgColor: this.$.data('fgcolor') || '#87CEEB',
                    inputColor: this.$.data('inputcolor'),
                    font: this.$.data('font') || 'Arial',
                    fontWeight: this.$.data('font-weight') || 'bold',
                    inline: false,
                    step: this.$.data('step') || 1,
                    rotation: this.$.data('rotation'),

                    // Hooks
                    draw: null, // function () {}
                    change: null, // function (value) {}
                    cancel: null, // function () {}
                    release: null, // function (value) {}

                    // Output formatting, allows to add unit: %, ms ...
                    format: function(v) {
                        return v;
                    },
                    parse: function (v) {
                        return parseFloat(v);
                    }
                }, this.o
            );

            // finalize options
            this.o.flip = this.o.rotation === 'anticlockwise' || this.o.rotation === 'acw';
            if (!this.o.inputColor) {
                this.o.inputColor = this.o.fgColor;
            }

            // routing value
            if (this.$.is('fieldset')) {

                // fieldset = array of integer
                this.v = {};
                this.i = this.$.find('input');
                this.i.each(function(k) {
                    var $this = $(this);
                    s.i[k] = $this;
                    s.v[k] = s.o.parse($this.val());

                    $this.on(
                        'change blur',
                        function () {
                            var val = {};
                            val[k] = $this.val();
                            s.val(s._validate(val));
                        }
                    );
                });
                this.$.find('legend').remove();
            } else {

                // input = integer
                this.i = this.$;
                this.v = this.o.parse(this.$.val());
                this.v === '' && (this.v = this.o.min);
                this.$.on(
                    'change blur',
                    function () {
                        s.val(s._validate(s.o.parse(s.$.val())));
                    }
                );

            }

            !this.o.displayInput && this.$.hide();

            // adds needed DOM elements (canvas, div)
            this.$c = $(document.createElement('canvas')).attr({
                width: this.o.width,
                height: this.o.height
            });

            // wraps all elements in a div
            // add to DOM before Canvas init is triggered
            this.$div = $('<div style="'
                + (this.o.inline ? 'display:inline;' : '')
                + 'width:' + this.o.width + 'px;height:' + this.o.height + 'px;'
                + '"></div>');

            this.$.wrap(this.$div).before(this.$c);
            this.$div = this.$.parent();

            if (typeof G_vmlCanvasManager !== 'undefined') {
                G_vmlCanvasManager.initElement(this.$c[0]);
            }

            this.c = this.$c[0].getContext ? this.$c[0].getContext('2d') : null;

            if (!this.c) {
                throw {
                    name:        "CanvasNotSupportedException",
                    message:     "Canvas not supported. Please use excanvas on IE8.0.",
                    toString:    function(){return this.name + ": " + this.message}
                }
            }

            // hdpi support
            this.scale = (window.devicePixelRatio || 1) / (
                            this.c.webkitBackingStorePixelRatio ||
                            this.c.mozBackingStorePixelRatio ||
                            this.c.msBackingStorePixelRatio ||
                            this.c.oBackingStorePixelRatio ||
                            this.c.backingStorePixelRatio || 1
                         );

            // detects relative width / height
            this.relativeWidth =  this.o.width % 1 !== 0
                                  && this.o.width.indexOf('%');
            this.relativeHeight = this.o.height % 1 !== 0
                                  && this.o.height.indexOf('%');
            this.relative = this.relativeWidth || this.relativeHeight;

            // computes size and carves the component
            this._carve();

            // prepares props for transaction
            if (this.v instanceof Object) {
                this.cv = {};
                this.copy(this.v, this.cv);
            } else {
                this.cv = this.v;
            }

            // binds configure event
            this.$
                .on("configure", cf)
                .parent()
                .on("configure", cf);

            // finalize init
            this._listen()
                ._configure()
                ._xy()
                .init();

            this.isInit = true;

            this.$.val(this.o.format(this.v));
            this._draw();

            return this;
        };

        this._carve = function() {
            if (this.relative) {
                var w = this.relativeWidth ?
                        this.$div.parent().width() *
                        parseInt(this.o.width) / 100
                        : this.$div.parent().width(),
                    h = this.relativeHeight ?
                        this.$div.parent().height() *
                        parseInt(this.o.height) / 100
                        : this.$div.parent().height();

                // apply relative
                this.w = this.h = Math.min(w, h);
            } else {
                this.w = this.o.width;
                this.h = this.o.height;
            }

            // finalize div
            this.$div.css({
                'width': this.w + 'px',
                'height': this.h + 'px'
            });

            // finalize canvas with computed width
            this.$c.attr({
                width: this.w,
                height: this.h
            });

            // scaling
            if (this.scale !== 1) {
                this.$c[0].width = this.$c[0].width * this.scale;
                this.$c[0].height = this.$c[0].height * this.scale;
                this.$c.width(this.w);
                this.$c.height(this.h);
            }

            return this;
        };

        this._draw = function () {

            // canvas pre-rendering
            var d = true;

            s.g = s.c;

            s.clear();

            s.dH && (d = s.dH());

            d !== false && s.draw();
        };

        this._touch = function (e) {
            var touchMove = function (e) {
                var v = s.xy2val(
                            e.originalEvent.touches[s.t].pageX,
                            e.originalEvent.touches[s.t].pageY
                        );

                if (v == s.cv) return;

                if (s.cH && s.cH(v) === false) return;

                s.change(s._validate(v));
                s._draw();
            };

            // get touches index
            this.t = k.c.t(e);

            // First touch
            touchMove(e);

            // Touch events listeners
            k.c.d
                .on("touchmove.k", touchMove)
                .on(
                    "touchend.k",
                    function () {
                        k.c.d.off('touchmove.k touchend.k');
                        s.val(s.cv);
                    }
                );

            return this;
        };

        this._mouse = function (e) {
            var mouseMove = function (e) {
                var v = s.xy2val(e.pageX, e.pageY);

                if (v == s.cv) return;

                if (s.cH && (s.cH(v) === false)) return;

                s.change(s._validate(v));
                s._draw();
            };

            // First click
            mouseMove(e);

            // Mouse events listeners
            k.c.d
                .on("mousemove.k", mouseMove)
                .on(
                    // Escape key cancel current change
                    "keyup.k",
                    function (e) {
                        if (e.keyCode === 27) {
                            k.c.d.off("mouseup.k mousemove.k keyup.k");

                            if (s.eH && s.eH() === false)
                                return;

                            s.cancel();
                        }
                    }
                )
                .on(
                    "mouseup.k",
                    function (e) {
                        k.c.d.off('mousemove.k mouseup.k keyup.k');
                        s.val(s.cv);
                    }
                );

            return this;
        };

        this._xy = function () {
            var o = this.$c.offset();
            this.x = o.left;
            this.y = o.top;

            return this;
        };

        this._listen = function () {
            if (!this.o.readOnly) {
                this.$c
                    .on(
                        "mousedown",
                        function (e) {
                            e.preventDefault();
                            s._xy()._mouse(e);
                        }
                    )
                    .on(
                        "touchstart",
                        function (e) {
                            e.preventDefault();
                            s._xy()._touch(e);
                        }
                    );

                this.listen();
            } else {
                this.$.attr('readonly', 'readonly');
            }

            if (this.relative) {
                $(window).on("resize", function() {
                    s._carve().init();
                    s._draw();
                });
            }

            return this;
        };

        this._configure = function () {

            // Hooks
            if (this.o.draw) this.dH = this.o.draw;
            if (this.o.change) this.cH = this.o.change;
            if (this.o.cancel) this.eH = this.o.cancel;
            if (this.o.release) this.rH = this.o.release;

            if (this.o.displayPrevious) {
                this.pColor = this.h2rgba(this.o.fgColor, "0.4");
                this.fgColor = this.h2rgba(this.o.fgColor, "0.6");
            } else {
                this.fgColor = this.o.fgColor;
            }

            return this;
        };

        this._clear = function () {
            this.$c[0].width = this.$c[0].width;
        };

        this._validate = function (v) {
            var val = (~~ (((v < 0) ? -0.5 : 0.5) + (v/this.o.step))) * this.o.step;
            return Math.round(val * 100) / 100;
        };

        // Abstract methods
        this.listen = function () {}; // on start, one time
        this.extend = function () {}; // each time configure triggered
        this.init = function () {}; // each time configure triggered
        this.change = function (v) {}; // on change
        this.val = function (v) {}; // on release
        this.xy2val = function (x, y) {}; //
        this.draw = function () {}; // on change / on release
        this.clear = function () { this._clear(); };

        // Utils
        this.h2rgba = function (h, a) {
            var rgb;
            h = h.substring(1,7);
            rgb = [
                parseInt(h.substring(0,2), 16),
                parseInt(h.substring(2,4), 16),
                parseInt(h.substring(4,6), 16)
            ];

            return "rgba(" + rgb[0] + "," + rgb[1] + "," + rgb[2] + "," + a + ")";
        };

        this.copy = function (f, t) {
            for (var i in f) {
                t[i] = f[i];
            }
        };
    };


    /**
     * k.Dial
     */
    k.Dial = function () {
        k.o.call(this);

        this.startAngle = null;
        this.xy = null;
        this.radius = null;
        this.lineWidth = null;
        this.cursorExt = null;
        this.w2 = null;
        this.PI2 = 2*Math.PI;

        this.extend = function () {
            this.o = $.extend({
                bgColor: this.$.data('bgcolor') || '#EEEEEE',
                angleOffset: this.$.data('angleoffset') || 0,
                angleArc: this.$.data('anglearc') || 360,
                inline: true
            }, this.o);
        };

        this.val = function (v, triggerRelease) {
            if (null != v) {

                // reverse format
                v = this.o.parse(v);

                if (triggerRelease !== false
                    && v != this.v
                    && this.rH
                    && this.rH(v) === false) { return; }

                this.cv = this.o.stopper ? max(min(v, this.o.max), this.o.min) : v;
                this.v = this.cv;
                this.$.val(this.o.format(this.v));
                this._draw();
            } else {
                return this.v;
            }
        };

        this.xy2val = function (x, y) {
            var a, ret;

            a = Math.atan2(
                        x - (this.x + this.w2),
                        - (y - this.y - this.w2)
                    ) - this.angleOffset;

            if (this.o.flip) {
                a = this.angleArc - a - this.PI2;
            }

            if (this.angleArc != this.PI2 && (a < 0) && (a > -0.5)) {

                // if isset angleArc option, set to min if .5 under min
                a = 0;
            } else if (a < 0) {
                a += this.PI2;
            }

            ret = (a * (this.o.max - this.o.min) / this.angleArc) + this.o.min;

            this.o.stopper && (ret = max(min(ret, this.o.max), this.o.min));

            return ret;
        };

        this.listen = function () {

            // bind MouseWheel
            var s = this, mwTimerStop,
                mwTimerRelease,
                mw = function (e) {
                    // PrimeFaces #4098
                        e.stopImmediatePropagation();
                        e.stopPropagation();
                        
                    e.preventDefault();

                    var ori = e.originalEvent,
                        deltaX = ori.detail || ori.wheelDeltaX,
                        deltaY = ori.detail || ori.wheelDeltaY,
                        v = s._validate(s.o.parse(s.$.val()))
                            + (
                                deltaX > 0 || deltaY > 0
                                ? s.o.step
                                : deltaX < 0 || deltaY < 0 ? -s.o.step : 0
                              );

                    v = max(min(v, s.o.max), s.o.min);

                    s.val(v, false);

                    if (s.rH) {
                        // Handle mousewheel stop
                        clearTimeout(mwTimerStop);
                        mwTimerStop = setTimeout(function () {
                            s.rH(v);
                            mwTimerStop = null;
                        }, 100);

                        // Handle mousewheel releases
                        if (!mwTimerRelease) {
                            mwTimerRelease = setTimeout(function () {
                                if (mwTimerStop)
                                    s.rH(v);
                                mwTimerRelease = null;
                            }, 200);
                        }
                    }
                },
                kval,
                to,
                m = 1,
                kv = {
                    37: -s.o.step,
                    38: s.o.step,
                    39: s.o.step,
                    40: -s.o.step
                };

            this.$
                .on(
                    "keydown",
                    function (e) {
                        var kc = e.keyCode;

                        // numpad support
                        if (kc >= 96 && kc <= 105) {
                            kc = e.keyCode = kc - 48;
                        }

                        kval = parseInt(String.fromCharCode(kc));

                        if (isNaN(kval)) {
                            (kc !== 13)                     // enter
                            && kc !== 8                     // bs
                            && kc !== 9                     // tab
                            && kc !== 189                   // -
                            && (kc !== 190
                                || s.$.val().match(/\./))   // . allowed once
                            && e.preventDefault();

                            // arrows
                            if ($.inArray(kc,[37,38,39,40]) > -1) {
                                e.preventDefault();

                                var v = s.o.parse(s.$.val()) + kv[kc] * m;
                                s.o.stopper && (v = max(min(v, s.o.max), s.o.min));

                                s.change(s._validate(v));
                                s._draw();

                                // long time keydown speed-up
                                to = window.setTimeout(function () {
                                    m *= 2;
                                }, 30);
                            }
                        }
                    }
                )
                .on(
                    "keyup",
                    function (e) {
                        if (isNaN(kval)) {
                            if (to) {
                                window.clearTimeout(to);
                                to = null;
                                m = 1;
                                s.val(s.$.val());
                            }
                        } else {
                            // kval postcond
                            (s.$.val() > s.o.max && s.$.val(s.o.max))
                            || (s.$.val() < s.o.min && s.$.val(s.o.min));
                        }
                    }
                );

            this.$c.on("mousewheel DOMMouseScroll", mw);
            this.$.on("mousewheel DOMMouseScroll", mw);
        };

        this.init = function () {
            if (this.v < this.o.min
                || this.v > this.o.max) { this.v = this.o.min; }

            this.$.val(this.v);
            this.w2 = this.w / 2;
            this.cursorExt = this.o.cursor / 100;
            this.xy = this.w2 * this.scale;
            this.lineWidth = this.xy * this.o.thickness;
            this.lineCap = this.o.lineCap;
            this.radius = this.xy - this.lineWidth / 2;

            this.o.angleOffset
            && (this.o.angleOffset = isNaN(this.o.angleOffset) ? 0 : this.o.angleOffset);

            this.o.angleArc
            && (this.o.angleArc = isNaN(this.o.angleArc) ? this.PI2 : this.o.angleArc);

            // deg to rad
            this.angleOffset = this.o.angleOffset * Math.PI / 180;
            this.angleArc = this.o.angleArc * Math.PI / 180;

            // compute start and end angles
            this.startAngle = 1.5 * Math.PI + this.angleOffset;
            this.endAngle = 1.5 * Math.PI + this.angleOffset + this.angleArc;

            var s = max(
                String(Math.abs(this.o.max)).length,
                String(Math.abs(this.o.min)).length,
                2
            ) + 2;

            this.o.displayInput
                && this.i.css({
                        'width' : ((this.w / 2 + 4) >> 0) + 'px',
                        'height' : ((this.w / 3) >> 0) + 'px',
                        'position' : 'absolute',
                        'vertical-align' : 'middle',
                        'margin-top' : ((this.w / 3) >> 0) + 'px',
                        'margin-left' : '-' + ((this.w * 3 / 4 + 2) >> 0) + 'px',
                        'border' : 0,
                        'background' : 'none',
                        'font' : this.o.fontWeight + ' ' + ((this.w / s) >> 0) + 'px ' + this.o.font,
                        'text-align' : 'center',
                        'color' : this.o.inputColor || this.o.fgColor,
                        'padding' : '0px',
                        '-webkit-appearance': 'none'
                        }) || this.i.css({
                            'width': '0px',
                            'visibility': 'hidden'
                        });
        };

        this.change = function (v) {
            this.cv = v;
            this.$.val(this.o.format(v));
        };

        this.angle = function (v) {
            return (v - this.o.min) * this.angleArc / (this.o.max - this.o.min);
        };

        this.arc = function (v) {
          var sa, ea;
          v = this.angle(v);
          if (this.o.flip) {
              sa = this.endAngle + 0.00001;
              ea = sa - v - 0.00001;
          } else {
              sa = this.startAngle - 0.00001;
              ea = sa + v + 0.00001;
          }
          this.o.cursor
              && (sa = ea - this.cursorExt)
              && (ea = ea + this.cursorExt);

          return {
              s: sa,
              e: ea,
              d: this.o.flip && !this.o.cursor
          };
        };

        this.draw = function () {
            var c = this.g,                 // context
                a = this.arc(this.cv),      // Arc
                pa,                         // Previous arc
                r = 1;

            c.lineWidth = this.lineWidth;
            c.lineCap = this.lineCap;

            if (this.o.bgColor !== "none") {
                c.beginPath();
                    c.strokeStyle = this.o.bgColor;
                    c.arc(this.xy, this.xy, this.radius, this.endAngle - 0.00001, this.startAngle + 0.00001, true);
                c.stroke();
            }

            if (this.o.displayPrevious) {
                pa = this.arc(this.v);
                c.beginPath();
                c.strokeStyle = this.pColor;
                c.arc(this.xy, this.xy, this.radius, pa.s, pa.e, pa.d);
                c.stroke();
                r = this.cv == this.v;
            }

            c.beginPath();
            c.strokeStyle = r ? this.o.fgColor : this.fgColor ;
            c.arc(this.xy, this.xy, this.radius, a.s, a.e, a.d);
            c.stroke();
        };

        this.cancel = function () {
            this.val(this.v);
        };
    };

    $.fn.dial = $.fn.knob = function (o) {
        return this.each(
            function () {
                var d = new k.Dial();
                d.o = o;
                d.$ = $(this);
                d.run();
            }
        ).parent();
    };

}));

/**
 * __PrimeFaces Knob Widget__
 * 
 * Knob is an input component to insert numeric values in a range.
 * 
 * @typedef PrimeFaces.widget.Knob.OnChangeCallback Client side callback to invoke when value changes. See also
 * {@link KnobCfg.onchange}.
 * @param {number} PrimeFaces.widget.Knob.OnChangeCallback.currentValue Current numerical value of the knob.
 * 
 * @interface {PrimeFaces.widget.Knob.ColorTheme} ColorTheme A color theme for the knob, consisting of the color for the
 * filled and unfilled part of the knob.
 * @prop {string} ColorTheme.fgColor The foreground color, i.e. the color of the filled part of the knob. Must be a CSS
 * color, e.g. `#ff0000`.
 * @prop {string} ColorTheme.bgColor The background color, i.e. the color of the unfilled part of the knob. Must be a
 * CSS color, e.g. `#ff0000`.
 * 
 * @prop {string} colorTheme Name of the color theme to use. You can use on of the keys defined in
 * `PrimeFaces.widget.Knob.ColorThemes`.
 * @prop {number} cursorExt Used for the computing the theme layout.
 * @prop {JQuery} input The DOM Element for the hidden input that stores the value of this widget.
 * @prop {JQuery} knob The DOM element on which the JQuery knob plugin was initialized.
 * @prop {number} min Minimum allowed value for this knob.
 * @prop {number} max Maximum allowed value for this knob.
 * @prop {number} step Step size for incrementing or decrementing the value of this knob.
 * @prop {PrimeFaces.widget.Knob.ColorTheme} themeObject Color theme data to be used.
 * 
 * @interface {PrimeFaces.widget.KnobCfg} cfg The configuration for the {@link  Knob| Knob widget}.
 * You can access this configuration via {@link PrimeFaces.widget.BaseWidget.cfg|BaseWidget.cfg}. Please note that this
 * configuration is usually meant to be read-only and should not be modified.
 * @extends {PrimeFaces.widget.BaseWidgetCfg} cfg
 * 
 * @prop {string} cfg.colorTheme Theme of the knob.
 * @prop {string} cfg.bgColor Foreground color of the component.
 * @prop {string} cfg.fgColor Background color of the component.
 * @prop {string} cfg.labelTemplate Template of the progress value e.g. `{value}%`.
 * @prop {PrimeFaces.widget.Knob.OnChangeCallback} cfg.onchange Client side callback to invoke when value changes.
 * @prop {string} cfg.styleClass Style class of the component.
 */
PrimeFaces.widget.Knob = PrimeFaces.widget.BaseWidget.extend({

    /**
     * @override
     * @inheritdoc
     * @param {PrimeFaces.PartialWidgetCfg<TCfg>} cfg
     */
    init: function (cfg) {
        this._super(cfg);

        this.colorTheme = this.cfg.colorTheme;
        this.input = $(this.jqId + "_hidden");
        this.min = parseInt(this.jq.data('min'), 10);
        this.max = parseInt(this.jq.data('max'), 10);
        this.step = parseInt(this.jq.data('step'), 10);

        this.createKnob();

    },

    /**
     * @override
     * @inheritdoc
     * @param {PrimeFaces.PartialWidgetCfg<TCfg>} cfg
     */
    refresh: function(cfg) {
        if (this.knob) {
            this.knob.children('canvas').remove();
            this.input.remove();
            this.knob.children('input').unwrap();
        }
        
        this.init(cfg);
    },
    
    /**
     * Creates the knob widget and sets up all event listeners.
     * @private
     */
    createKnob: function () {
        var $this = this;

        this.themeObject = PrimeFaces.widget.Knob.colorThemes[this.colorTheme || 'aristo'];

        this.jq.data('fgcolor', this.cfg.fgColor || this.themeObject.fgColor);
        this.jq.data('bgcolor', this.cfg.bgColor || this.themeObject.bgColor);

        /* PrimeFaces Github #4085 */
        this.jq.css({
            'pointer-events': 'none',
            '-moz-user-select': 'none'
        });

        this.knob = this.jq.knob({
            release: function (value) {
                $this.input.val(value);

                if ($this.cfg.onchange) {
                    $this.cfg.onchange(value);
                }

                if ($this.hasBehavior('change')) {
                    var ext = {
                        params: [
                            {name: $this.id + '_hidden', value: value}
                        ]
                    };

                    $this.callBehavior('change', ext);
                }
            },
            format: function (value) {
                return $this.cfg.labelTemplate.replace('{value}', value);
            },
            draw: function () {

                // "tron" case
                if (this.$.data('skin') == 'tron') {

                    this.cursorExt = 0.3;

                    var a = this.arc(this.cv) // Arc
                            , pa // Previous arc
                            , r = 1;

                    this.g.lineWidth = this.lineWidth;

                    if (this.o.displayPrevious) {
                        pa = this.arc(this.v);
                        this.g.beginPath();
                        this.g.strokeStyle = this.pColor;
                        this.g.arc(this.xy, this.xy, this.radius - this.lineWidth, pa.s, pa.e, pa.d);
                        this.g.stroke();
                    }

                    this.g.beginPath();
                    this.g.strokeStyle = r ? this.o.fgColor : this.fgColor;
                    this.g.arc(this.xy, this.xy, this.radius - this.lineWidth, a.s, a.e, a.d);
                    this.g.stroke();

                    this.g.lineWidth = 2;
                    this.g.beginPath();
                    this.g.strokeStyle = this.o.fgColor;
                    this.g.arc(this.xy, this.xy, this.radius - this.lineWidth + 1 + this.lineWidth * 2 / 3, 0, 2 * Math.PI, false);
                    this.g.stroke();

                    return false;
                }
            }
        });
        
        this.knob.addClass(this.cfg.styleClass);
    },

    /**
     * Sets the value of this knob widget to the given value.
     * @param {number} value Value to set on this knob.
     */
    setValue: function (value) {
        this.input.val(value);
        this.jq.val(value).trigger('change');
    },

    /**
     * Retrieves the current value of this knob, as a number.
     * @return {number} The current numerical value of this knob.
     */
    getValue: function () {
        return parseInt(this.jq.val());
    },

    /**
     * Increments the value of this knob by the current step size.
     */
    increment: function () {
        var value = this.getValue() + this.step;
        value = value <= this.max ? value : this.max;
        this.setValue(value);
    },

    /**
     * Decrements the value of this knob by the current step size.
     */
    decrement: function () {
        var value = this.getValue() - this.step;
        value = value >= this.min ? value : this.min;
        this.setValue(value);
    }
});

/**
 * Interface for the the list of available builtin color themes for the {@link Knob} widget.
 * @interface {PrimeFaces.widget.Knob.ColorThemes} .
 * @constant {PrimeFaces.widget.Knob.colorThemes} . Contains a list with the available builtin color themes for the
 * {@link Knob} widget.
 */
PrimeFaces.widget.Knob.colorThemes = {
    /** 
     * The default afterdark theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    afterdark: {
        fgColor: '#8C9B8C',
        bgColor: '#535353'
    },
    /** 
     * The default afternoon theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    afternoon: {
        fgColor: '#5E61B0',
        bgColor: '#EBF8FF'
    },
    /** 
     * The default afterwork theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    afterwork: {
        fgColor: '#000000',
        bgColor: '#EBEBEB'
    },
    /** 
     * The default aristo theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    aristo: {
        fgColor: '#000000',
        bgColor: '#E3E3E3'
    },
    /** 
     * The default blitzer theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    blitzer: {
        fgColor: '#CC0505',
        bgColor: '#F1F1F1'
    },
    /** 
     * The default bluesky theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    bluesky: {
        fgColor: 'black',
        bgColor: '#E5EEFA'
    },
    /** 
     * The default black tie theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    'black-tie': {
        fgColor: 'black',
        bgColor: 'white'
    },
    /** 
     * The default bootstrap theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    bootstrap: {
        fgColor: '#000000',
        bgColor: '#EBEBEB'
    },
    /** 
     * The default casablanca theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    casablanca: {
        fgColor: '#030303',
        bgColor: '#F9F8F5'
    },
    /** 
     * The default cruze theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    cruze: {
        fgColor: '#C1C1C1',
        bgColor: '#3D3D3D'
    },
    /** 
     * The default cupertino theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    cupertino: {
        fgColor: '#2A7BAB',
        bgColor: '#D8EBF9'
    },
    /** 
     * The default dark hive theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    'dark-hive': {
        fgColor: 'white',
        bgColor: '#5F5F5F'
    },
    /** 
     * The default delta theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    delta: {
        fgColor: '#1B1D1F',
        bgColor: '#F9F9FC'
    },
    /** 
     * The default dot luv theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    'dot-luv': {
        fgColor: 'white',
        bgColor: '#083C6D'
    },
    /** 
     * The default eggplant theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    eggplant: {
        fgColor: 'white',
        bgColor: '#DFDCE1'
    },
    /** 
     * The default excite bike theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    'excite-bike': {
        fgColor: '#E69700',
        bgColor: '#1E88E6'
    },
    /** 
     * The default flick theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    flick: {
        fgColor: '#1980EC',
        bgColor: '#E0E0E0'
    },
    /** 
     * The default glass x theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    'glass-x': {
        fgColor: 'black',
        bgColor: '#D7E1E8'
    },
    /** 
     * The default home theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    home: {
        fgColor: '#424548',
        bgColor: '#747C89'
    },
    /** 
     * The default hot sneaks theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    'hot-sneaks': {
        fgColor: '#D2D660',
        bgColor: '#35414F'
    },
    /** 
     * The default humanity theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    humanity: {
        fgColor: 'white',
        bgColor: '#CB842F'
    },
    /** 
     * The default le frog theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    'le-frog': {
        fgColor: 'white',
        bgColor: '#5BA920'
    },
    /** 
     * The default midnight theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    midnight: {
        fgColor: 'white',
        bgColor: '#363641'
    },
    /** 
     * The default mint choc theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    'mint-choc': {
        fgColor: '#E3DDC9',
        bgColor: '#59493D'
    },
    /** 
     * The default overcast theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    overcast: {
        fgColor: '#3383BB',
        bgColor: '#F2F2F2'
    },
    /** 
     * The default pepper grinder theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    'pepper-grinder': {
        fgColor: '#654B24',
        bgColor: '#F6F5F4'
    },
    /** 
     * The default redmond theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    redmond: {
        fgColor: '#2E6E9E',
        bgColor: '#EAF4FD'
    },
    /** 
     * The default rocket theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    rocket: {
        fgColor: 'white',
        bgColor: '#292627'
    },
    /** 
     * The default sam theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    sam: {
        fgColor: '#000000',
        bgColor: '#E3E3E3'
    },
    /** 
     * The default smoothness theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    smoothness: {
        fgColor: '#000000',
        bgColor: '#E3E3E3'
    },
    /** 
     * The default south street theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    'south-street': {
        fgColor: 'white',
        bgColor: '#4CA109'
    },
    /** 
     * The default start theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    start: {
        fgColor: '#222222',
        bgColor: '#2E90BD'
    },
    /** 
     * The default sunny theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    sunny: {
        fgColor: '#9A9384',
        bgColor: '#FCDA66'
    },
    /** 
     * The default swanky purse theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    'swanky-purse': {
        fgColor: '#EFEC9F',
        bgColor: '#261803'
    },
    /** 
     * The default trontastic theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    trontastic: {
        fgColor: 'white',
        bgColor: '#BEE590'
    },
    /** 
     * The default ui darkness theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    'ui-darkness': {
        fgColor: 'white',
        bgColor: '#585858'
    },
    /** 
     * The default ui lightness theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    'ui-lightness': {
        fgColor: 'white',
        bgColor: '#F7B13D'
    },
    /** 
     * The default vader theme.
     * @type {PrimeFaces.widget.Knob.ColorTheme}
     */
    vader: {
        fgColor: 'white',
        bgColor: '#AEAEAE'
    }
};