/*!jQuery Knob*/

/**

 * Downward compatible, touchable dial

 *

 * Version: 1.2.7 (23/02/2014)

 * 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($) {



    /**

     * 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,



                    // 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

            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.bind(

                        'change blur'

                        , function () {

                            var val = {};

                            val[k] = $this.val();

                            s.val(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.$.bind(

                    '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.$

                .bind("configure", cf)

                .parent()

                .bind("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

                .bind("touchmove.k", touchMove)

                .bind(

                    "touchend.k"

                    , function () {

                        k.c.d.unbind('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

                .bind("mousemove.k", mouseMove)

                .bind(

                    // Escape key cancel current change

                    "keyup.k"

                    , function (e) {

                        if (e.keyCode === 27) {

                            k.c.d.unbind("mouseup.k mousemove.k keyup.k");



                            if (

                                s.eH

                                && (s.eH() === false)

                            ) return;



                            s.cancel();

                        }

                    }

                )

                .bind(

                    "mouseup.k"

                    , function (e) {

                        k.c.d.unbind('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

                    .bind(

                        "mousedown"

                        , function (e) {

                            e.preventDefault();

                            s._xy()._mouse(e);

                         }

                    )

                    .bind(

                        "touchstart"

                        , function (e) {

                            e.preventDefault();

                            s._xy()._touch(e);

                         }

                    );



                this.listen();

            } else {

                this.$.attr('readonly', 'readonly');

            }



            if(this.relative) {

                $(window).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) {

            return (~~ (((v < 0) ? -0.5 : 0.5) + (v/this.o.step))) * this.o.step;

        };



        // 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.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 = ~~ (0.5 + (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) {

                    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.$

                .bind(

                    "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(/\./))     // . only 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(v);

                                s._draw();



                                // long time keydown speed-up

                                to = window.setTimeout(

                                    function () { m *= 2; }, 30

                                );

                            }

                        }

                    }

                )

                .bind(

                    "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.bind("mousewheel DOMMouseScroll", mw);

            this.$.bind("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.draw = function () {



            var c = this.g,                 // context

                a = this.angle(this.cv)    // Angle

                , sat = this.startAngle     // Start angle

                , eat = sat + a             // End angle

                , sa, ea                    // Previous angles

                , r = 1;



            c.lineWidth = this.lineWidth;



            c.lineCap = this.lineCap;



            this.o.cursor

                && (sat = eat - this.cursorExt)

                && (eat = eat + this.cursorExt);



            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) {

                ea = this.startAngle + this.angle(this.v);

                sa = this.startAngle;

                this.o.cursor

                    && (sa = ea - this.cursorExt)

                    && (ea = ea + this.cursorExt);



                c.beginPath();

                    c.strokeStyle = this.pColor;

                    c.arc(this.xy, this.xy, this.radius, sa - 0.00001, ea + 0.00001, false);

                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, sat - 0.00001, eat + 0.00001, false);

            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();

    };



})(jQuery);