/*!jQuery Knob*/ /**

* Downward compatible, touchable dial
*
* Version: 1.2.12
* 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.bind(
                    '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.$.bind(
                'change blur',
                function () {
                    s.val(s._validate(s.o.parse(s.$.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) {
        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) {
                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(/\./))   // . 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);
                        }
                    }
                }
            )
            .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;

        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();
};

}));