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static/plugins/knob/jquery.knob.js 25.6 KB
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  /*!jQuery Knob*/
  /**
   * Downward compatible, touchable dial
   *
   * Version: 1.2.11
   * 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();
      };
  
  }));