/*!jQuery Knob*/ /**

* Downward compatible, touchable dial
*
* Version: 1.2.8
* 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,
                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.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.$.val(this.o.format(this.v));
            this._draw();
        } else {
            return this.v;
        }
    };
    this.xy2val = function (x, y) {
        var a, ret;
        a = Math.atan2(
            x - (this.x + this.w2)
            , - (y - this.y - this.w2)
        ) - this.angleOffset;
        if (this.o.flip) {
            a = this.angleArc - a - this.PI2;
        }
        if(this.angleArc != this.PI2 && (a < 0) && (a > -0.5)) {
            // if isset angleArc option, set to min if .5 under min
            a = 0;
        } else if (a < 0) {
            a += this.PI2;
        }
        ret = ~~ (0.5 + (a * (this.o.max - this.o.min) / this.angleArc))
            + this.o.min;
        this.o.stopper && (ret = max(min(ret, this.o.max), this.o.min));
        return ret;
    };
    this.listen = function () {
        // bind MouseWheel
        var s = this, mwTimerStop, mwTimerRelease,
            mw = function (e) {
                e.preventDefault();
                var ori = e.originalEvent
                    ,deltaX = ori.detail || ori.wheelDeltaX
                    ,deltaY = ori.detail || ori.wheelDeltaY
                    ,v = s._validate(s.o.parse(s.$.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.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;
        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();
};

})(jQuery);