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1 /* Javascript plotting library for jQuery, version 0.8.1. |
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2 |
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3 Copyright (c) 2007-2013 IOLA and Ole Laursen. |
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4 Licensed under the MIT license. |
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5 |
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6 */ |
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7 |
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8 // first an inline dependency, jquery.colorhelpers.js, we inline it here |
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9 // for convenience |
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10 |
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11 /* Plugin for jQuery for working with colors. |
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12 * |
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13 * Version 1.1. |
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14 * |
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15 * Inspiration from jQuery color animation plugin by John Resig. |
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16 * |
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17 * Released under the MIT license by Ole Laursen, October 2009. |
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18 * |
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19 * Examples: |
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20 * |
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21 * $.color.parse("#fff").scale('rgb', 0.25).add('a', -0.5).toString() |
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22 * var c = $.color.extract($("#mydiv"), 'background-color'); |
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23 * console.log(c.r, c.g, c.b, c.a); |
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24 * $.color.make(100, 50, 25, 0.4).toString() // returns "rgba(100,50,25,0.4)" |
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25 * |
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26 * Note that .scale() and .add() return the same modified object |
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27 * instead of making a new one. |
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28 * |
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29 * V. 1.1: Fix error handling so e.g. parsing an empty string does |
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30 * produce a color rather than just crashing. |
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31 */ |
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32 (function(B){B.color={};B.color.make=function(F,E,C,D){var G={};G.r=F||0;G.g=E||0;G.b=C||0;G.a=D!=null?D:1;G.add=function(J,I){for(var H=0;H<J.length;++H){G[J.charAt(H)]+=I}return G.normalize()};G.scale=function(J,I){for(var H=0;H<J.length;++H){G[J.charAt(H)]*=I}return G.normalize()};G.toString=function(){if(G.a>=1){return"rgb("+[G.r,G.g,G.b].join(",")+")"}else{return"rgba("+[G.r,G.g,G.b,G.a].join(",")+")"}};G.normalize=function(){function H(J,K,I){return K<J?J:(K>I?I:K)}G.r=H(0,parseInt(G.r),255);G.g=H(0,parseInt(G.g),255);G.b=H(0,parseInt(G.b),255);G.a=H(0,G.a,1);return G};G.clone=function(){return B.color.make(G.r,G.b,G.g,G.a)};return G.normalize()};B.color.extract=function(D,C){var E;do{E=D.css(C).toLowerCase();if(E!=""&&E!="transparent"){break}D=D.parent()}while(!B.nodeName(D.get(0),"body"));if(E=="rgba(0, 0, 0, 0)"){E="transparent"}return B.color.parse(E)};B.color.parse=function(F){var E,C=B.color.make;if(E=/rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(F)){return C(parseInt(E[1],10),parseInt(E[2],10),parseInt(E[3],10))}if(E=/rgba\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(F)){return C(parseInt(E[1],10),parseInt(E[2],10),parseInt(E[3],10),parseFloat(E[4]))}if(E=/rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(F)){return C(parseFloat(E[1])*2.55,parseFloat(E[2])*2.55,parseFloat(E[3])*2.55)}if(E=/rgba\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(F)){return C(parseFloat(E[1])*2.55,parseFloat(E[2])*2.55,parseFloat(E[3])*2.55,parseFloat(E[4]))}if(E=/#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(F)){return C(parseInt(E[1],16),parseInt(E[2],16),parseInt(E[3],16))}if(E=/#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(F)){return C(parseInt(E[1]+E[1],16),parseInt(E[2]+E[2],16),parseInt(E[3]+E[3],16))}var D=B.trim(F).toLowerCase();if(D=="transparent"){return C(255,255,255,0)}else{E=A[D]||[0,0,0];return C(E[0],E[1],E[2])}};var A={aqua:[0,255,255],azure:[240,255,255],beige:[245,245,220],black:[0,0,0],blue:[0,0,255],brown:[165,42,42],cyan:[0,255,255],darkblue:[0,0,139],darkcyan:[0,139,139],darkgrey:[169,169,169],darkgreen:[0,100,0],darkkhaki:[189,183,107],darkmagenta:[139,0,139],darkolivegreen:[85,107,47],darkorange:[255,140,0],darkorchid:[153,50,204],darkred:[139,0,0],darksalmon:[233,150,122],darkviolet:[148,0,211],fuchsia:[255,0,255],gold:[255,215,0],green:[0,128,0],indigo:[75,0,130],khaki:[240,230,140],lightblue:[173,216,230],lightcyan:[224,255,255],lightgreen:[144,238,144],lightgrey:[211,211,211],lightpink:[255,182,193],lightyellow:[255,255,224],lime:[0,255,0],magenta:[255,0,255],maroon:[128,0,0],navy:[0,0,128],olive:[128,128,0],orange:[255,165,0],pink:[255,192,203],purple:[128,0,128],violet:[128,0,128],red:[255,0,0],silver:[192,192,192],white:[255,255,255],yellow:[255,255,0]}})(jQuery); |
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33 |
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34 // the actual Flot code |
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35 (function($) { |
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36 |
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37 // Cache the prototype hasOwnProperty for faster access |
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38 |
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39 var hasOwnProperty = Object.prototype.hasOwnProperty; |
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40 |
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41 /////////////////////////////////////////////////////////////////////////// |
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42 // The Canvas object is a wrapper around an HTML5 <canvas> tag. |
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43 // |
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44 // @constructor |
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45 // @param {string} cls List of classes to apply to the canvas. |
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46 // @param {element} container Element onto which to append the canvas. |
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47 // |
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48 // Requiring a container is a little iffy, but unfortunately canvas |
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49 // operations don't work unless the canvas is attached to the DOM. |
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50 |
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51 function Canvas(cls, container) { |
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52 |
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53 var element = container.children("." + cls)[0]; |
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54 |
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55 if (element == null) { |
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56 |
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57 element = document.createElement("canvas"); |
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58 element.className = cls; |
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59 |
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60 $(element).css({ direction: "ltr", position: "absolute", left: 0, top: 0 }) |
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61 .appendTo(container); |
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62 |
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63 // If HTML5 Canvas isn't available, fall back to [Ex|Flash]canvas |
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64 |
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65 if (!element.getContext) { |
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66 if (window.G_vmlCanvasManager) { |
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67 element = window.G_vmlCanvasManager.initElement(element); |
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68 } else { |
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69 throw new Error("Canvas is not available. If you're using IE with a fall-back such as Excanvas, then there's either a mistake in your conditional include, or the page has no DOCTYPE and is rendering in Quirks Mode."); |
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70 } |
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71 } |
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72 } |
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73 |
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74 this.element = element; |
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75 |
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76 var context = this.context = element.getContext("2d"); |
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77 |
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78 // Determine the screen's ratio of physical to device-independent |
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79 // pixels. This is the ratio between the canvas width that the browser |
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80 // advertises and the number of pixels actually present in that space. |
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81 |
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82 // The iPhone 4, for example, has a device-independent width of 320px, |
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83 // but its screen is actually 640px wide. It therefore has a pixel |
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84 // ratio of 2, while most normal devices have a ratio of 1. |
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85 |
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86 var devicePixelRatio = window.devicePixelRatio || 1, |
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87 backingStoreRatio = |
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88 context.webkitBackingStorePixelRatio || |
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89 context.mozBackingStorePixelRatio || |
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90 context.msBackingStorePixelRatio || |
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91 context.oBackingStorePixelRatio || |
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92 context.backingStorePixelRatio || 1; |
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93 |
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94 this.pixelRatio = devicePixelRatio / backingStoreRatio; |
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95 |
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96 // Size the canvas to match the internal dimensions of its container |
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97 |
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98 this.resize(container.width(), container.height()); |
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99 |
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100 // Collection of HTML div layers for text overlaid onto the canvas |
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101 |
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102 this.textContainer = null; |
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103 this.text = {}; |
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104 |
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105 // Cache of text fragments and metrics, so we can avoid expensively |
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106 // re-calculating them when the plot is re-rendered in a loop. |
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107 |
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108 this._textCache = {}; |
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109 } |
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110 |
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111 // Resizes the canvas to the given dimensions. |
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112 // |
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113 // @param {number} width New width of the canvas, in pixels. |
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114 // @param {number} width New height of the canvas, in pixels. |
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115 |
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116 Canvas.prototype.resize = function(width, height) { |
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117 |
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118 if (width <= 0 || height <= 0) { |
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119 throw new Error("Invalid dimensions for plot, width = " + width + ", height = " + height); |
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120 } |
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121 |
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122 var element = this.element, |
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123 context = this.context, |
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124 pixelRatio = this.pixelRatio; |
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125 |
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126 // Resize the canvas, increasing its density based on the display's |
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127 // pixel ratio; basically giving it more pixels without increasing the |
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128 // size of its element, to take advantage of the fact that retina |
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129 // displays have that many more pixels in the same advertised space. |
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130 |
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131 // Resizing should reset the state (excanvas seems to be buggy though) |
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132 |
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133 if (this.width != width) { |
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134 element.width = width * pixelRatio; |
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135 element.style.width = width + "px"; |
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136 this.width = width; |
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137 } |
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138 |
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139 if (this.height != height) { |
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140 element.height = height * pixelRatio; |
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141 element.style.height = height + "px"; |
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142 this.height = height; |
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143 } |
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144 |
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145 // Save the context, so we can reset in case we get replotted. The |
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146 // restore ensure that we're really back at the initial state, and |
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147 // should be safe even if we haven't saved the initial state yet. |
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148 |
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149 context.restore(); |
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150 context.save(); |
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151 |
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152 // Scale the coordinate space to match the display density; so even though we |
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153 // may have twice as many pixels, we still want lines and other drawing to |
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154 // appear at the same size; the extra pixels will just make them crisper. |
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155 |
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156 context.scale(pixelRatio, pixelRatio); |
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157 }; |
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158 |
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159 // Clears the entire canvas area, not including any overlaid HTML text |
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160 |
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161 Canvas.prototype.clear = function() { |
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162 this.context.clearRect(0, 0, this.width, this.height); |
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163 }; |
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164 |
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165 // Finishes rendering the canvas, including managing the text overlay. |
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166 |
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167 Canvas.prototype.render = function() { |
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168 |
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169 var cache = this._textCache; |
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170 |
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171 // For each text layer, add elements marked as active that haven't |
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172 // already been rendered, and remove those that are no longer active. |
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173 |
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174 for (var layerKey in cache) { |
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175 if (hasOwnProperty.call(cache, layerKey)) { |
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176 |
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177 var layer = this.getTextLayer(layerKey), |
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178 layerCache = cache[layerKey]; |
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179 |
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180 layer.hide(); |
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181 |
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182 for (var styleKey in layerCache) { |
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183 if (hasOwnProperty.call(layerCache, styleKey)) { |
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184 var styleCache = layerCache[styleKey]; |
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185 for (var key in styleCache) { |
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186 if (hasOwnProperty.call(styleCache, key)) { |
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187 |
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188 var positions = styleCache[key].positions; |
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189 |
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190 for (var i = 0, position; position = positions[i]; i++) { |
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191 if (position.active) { |
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192 if (!position.rendered) { |
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193 layer.append(position.element); |
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194 position.rendered = true; |
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195 } |
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196 } else { |
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197 positions.splice(i--, 1); |
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198 if (position.rendered) { |
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199 position.element.detach(); |
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200 } |
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201 } |
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202 } |
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203 |
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204 if (positions.length == 0) { |
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205 delete styleCache[key]; |
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206 } |
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207 } |
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208 } |
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209 } |
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210 } |
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211 |
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212 layer.show(); |
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213 } |
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214 } |
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215 }; |
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216 |
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217 // Creates (if necessary) and returns the text overlay container. |
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218 // |
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219 // @param {string} classes String of space-separated CSS classes used to |
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220 // uniquely identify the text layer. |
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221 // @return {object} The jQuery-wrapped text-layer div. |
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222 |
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223 Canvas.prototype.getTextLayer = function(classes) { |
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224 |
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225 var layer = this.text[classes]; |
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226 |
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227 // Create the text layer if it doesn't exist |
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228 |
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229 if (layer == null) { |
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230 |
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231 // Create the text layer container, if it doesn't exist |
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232 |
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233 if (this.textContainer == null) { |
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234 this.textContainer = $("<div class='flot-text'></div>") |
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235 .css({ |
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236 position: "absolute", |
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237 top: 0, |
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238 left: 0, |
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239 bottom: 0, |
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240 right: 0, |
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241 'font-size': "smaller", |
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242 color: "#545454" |
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243 }) |
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244 .insertAfter(this.element); |
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245 } |
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246 |
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247 layer = this.text[classes] = $("<div></div>") |
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248 .addClass(classes) |
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249 .css({ |
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250 position: "absolute", |
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251 top: 0, |
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252 left: 0, |
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253 bottom: 0, |
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254 right: 0 |
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255 }) |
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256 .appendTo(this.textContainer); |
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257 } |
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258 |
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259 return layer; |
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260 }; |
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261 |
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262 // Creates (if necessary) and returns a text info object. |
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263 // |
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264 // The object looks like this: |
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265 // |
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266 // { |
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267 // width: Width of the text's wrapper div. |
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268 // height: Height of the text's wrapper div. |
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269 // element: The jQuery-wrapped HTML div containing the text. |
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270 // positions: Array of positions at which this text is drawn. |
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271 // } |
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272 // |
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273 // The positions array contains objects that look like this: |
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274 // |
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275 // { |
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276 // active: Flag indicating whether the text should be visible. |
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277 // rendered: Flag indicating whether the text is currently visible. |
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278 // element: The jQuery-wrapped HTML div containing the text. |
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279 // x: X coordinate at which to draw the text. |
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280 // y: Y coordinate at which to draw the text. |
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281 // } |
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282 // |
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283 // Each position after the first receives a clone of the original element. |
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284 // |
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285 // The idea is that that the width, height, and general 'identity' of the |
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286 // text is constant no matter where it is placed; the placements are a |
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287 // secondary property. |
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288 // |
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289 // Canvas maintains a cache of recently-used text info objects; getTextInfo |
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290 // either returns the cached element or creates a new entry. |
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291 // |
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292 // @param {string} layer A string of space-separated CSS classes uniquely |
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293 // identifying the layer containing this text. |
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294 // @param {string} text Text string to retrieve info for. |
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295 // @param {(string|object)=} font Either a string of space-separated CSS |
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296 // classes or a font-spec object, defining the text's font and style. |
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297 // @param {number=} angle Angle at which to rotate the text, in degrees. |
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298 // Angle is currently unused, it will be implemented in the future. |
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299 // @param {number=} width Maximum width of the text before it wraps. |
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300 // @return {object} a text info object. |
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301 |
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302 Canvas.prototype.getTextInfo = function(layer, text, font, angle, width) { |
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303 |
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304 var textStyle, layerCache, styleCache, info; |
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305 |
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306 // Cast the value to a string, in case we were given a number or such |
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307 |
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308 text = "" + text; |
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309 |
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310 // If the font is a font-spec object, generate a CSS font definition |
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311 |
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312 if (typeof font === "object") { |
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313 textStyle = font.style + " " + font.variant + " " + font.weight + " " + font.size + "px/" + font.lineHeight + "px " + font.family; |
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314 } else { |
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315 textStyle = font; |
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316 } |
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317 |
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318 // Retrieve (or create) the cache for the text's layer and styles |
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319 |
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320 layerCache = this._textCache[layer]; |
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321 |
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322 if (layerCache == null) { |
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323 layerCache = this._textCache[layer] = {}; |
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324 } |
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325 |
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326 styleCache = layerCache[textStyle]; |
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327 |
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328 if (styleCache == null) { |
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329 styleCache = layerCache[textStyle] = {}; |
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330 } |
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331 |
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332 info = styleCache[text]; |
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333 |
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334 // If we can't find a matching element in our cache, create a new one |
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335 |
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336 if (info == null) { |
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337 |
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338 var element = $("<div></div>").html(text) |
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339 .css({ |
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340 position: "absolute", |
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341 'max-width': width, |
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342 top: -9999 |
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343 }) |
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344 .appendTo(this.getTextLayer(layer)); |
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345 |
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346 if (typeof font === "object") { |
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347 element.css({ |
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348 font: textStyle, |
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349 color: font.color |
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350 }); |
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351 } else if (typeof font === "string") { |
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352 element.addClass(font); |
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353 } |
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354 |
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355 info = styleCache[text] = { |
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356 width: element.outerWidth(true), |
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357 height: element.outerHeight(true), |
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358 element: element, |
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359 positions: [] |
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360 }; |
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361 |
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362 element.detach(); |
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363 } |
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364 |
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365 return info; |
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366 }; |
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367 |
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368 // Adds a text string to the canvas text overlay. |
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369 // |
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370 // The text isn't drawn immediately; it is marked as rendering, which will |
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371 // result in its addition to the canvas on the next render pass. |
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372 // |
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373 // @param {string} layer A string of space-separated CSS classes uniquely |
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374 // identifying the layer containing this text. |
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375 // @param {number} x X coordinate at which to draw the text. |
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376 // @param {number} y Y coordinate at which to draw the text. |
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377 // @param {string} text Text string to draw. |
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378 // @param {(string|object)=} font Either a string of space-separated CSS |
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379 // classes or a font-spec object, defining the text's font and style. |
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380 // @param {number=} angle Angle at which to rotate the text, in degrees. |
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381 // Angle is currently unused, it will be implemented in the future. |
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382 // @param {number=} width Maximum width of the text before it wraps. |
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383 // @param {string=} halign Horizontal alignment of the text; either "left", |
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384 // "center" or "right". |
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385 // @param {string=} valign Vertical alignment of the text; either "top", |
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386 // "middle" or "bottom". |
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387 |
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388 Canvas.prototype.addText = function(layer, x, y, text, font, angle, width, halign, valign) { |
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389 |
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390 var info = this.getTextInfo(layer, text, font, angle, width), |
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391 positions = info.positions; |
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392 |
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393 // Tweak the div's position to match the text's alignment |
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394 |
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395 if (halign == "center") { |
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396 x -= info.width / 2; |
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397 } else if (halign == "right") { |
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398 x -= info.width; |
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399 } |
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400 |
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401 if (valign == "middle") { |
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402 y -= info.height / 2; |
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403 } else if (valign == "bottom") { |
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404 y -= info.height; |
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405 } |
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406 |
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407 // Determine whether this text already exists at this position. |
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408 // If so, mark it for inclusion in the next render pass. |
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409 |
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410 for (var i = 0, position; position = positions[i]; i++) { |
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411 if (position.x == x && position.y == y) { |
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412 position.active = true; |
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413 return; |
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414 } |
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415 } |
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416 |
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417 // If the text doesn't exist at this position, create a new entry |
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418 |
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419 // For the very first position we'll re-use the original element, |
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420 // while for subsequent ones we'll clone it. |
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421 |
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422 position = { |
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423 active: true, |
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424 rendered: false, |
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425 element: positions.length ? info.element.clone() : info.element, |
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426 x: x, |
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427 y: y |
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428 } |
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429 |
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430 positions.push(position); |
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431 |
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432 // Move the element to its final position within the container |
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433 |
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434 position.element.css({ |
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435 top: Math.round(y), |
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436 left: Math.round(x), |
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437 'text-align': halign // In case the text wraps |
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438 }); |
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439 }; |
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440 |
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441 // Removes one or more text strings from the canvas text overlay. |
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442 // |
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443 // If no parameters are given, all text within the layer is removed. |
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444 // |
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445 // Note that the text is not immediately removed; it is simply marked as |
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446 // inactive, which will result in its removal on the next render pass. |
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447 // This avoids the performance penalty for 'clear and redraw' behavior, |
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448 // where we potentially get rid of all text on a layer, but will likely |
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449 // add back most or all of it later, as when redrawing axes, for example. |
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450 // |
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451 // @param {string} layer A string of space-separated CSS classes uniquely |
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452 // identifying the layer containing this text. |
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453 // @param {number=} x X coordinate of the text. |
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454 // @param {number=} y Y coordinate of the text. |
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455 // @param {string=} text Text string to remove. |
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456 // @param {(string|object)=} font Either a string of space-separated CSS |
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457 // classes or a font-spec object, defining the text's font and style. |
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458 // @param {number=} angle Angle at which the text is rotated, in degrees. |
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459 // Angle is currently unused, it will be implemented in the future. |
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460 |
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461 Canvas.prototype.removeText = function(layer, x, y, text, font, angle) { |
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462 if (text == null) { |
|
463 var layerCache = this._textCache[layer]; |
|
464 if (layerCache != null) { |
|
465 for (var styleKey in layerCache) { |
|
466 if (hasOwnProperty.call(layerCache, styleKey)) { |
|
467 var styleCache = layerCache[styleKey]; |
|
468 for (var key in styleCache) { |
|
469 if (hasOwnProperty.call(styleCache, key)) { |
|
470 var positions = styleCache[key].positions; |
|
471 for (var i = 0, position; position = positions[i]; i++) { |
|
472 position.active = false; |
|
473 } |
|
474 } |
|
475 } |
|
476 } |
|
477 } |
|
478 } |
|
479 } else { |
|
480 var positions = this.getTextInfo(layer, text, font, angle).positions; |
|
481 for (var i = 0, position; position = positions[i]; i++) { |
|
482 if (position.x == x && position.y == y) { |
|
483 position.active = false; |
|
484 } |
|
485 } |
|
486 } |
|
487 }; |
|
488 |
|
489 /////////////////////////////////////////////////////////////////////////// |
|
490 // The top-level container for the entire plot. |
|
491 |
|
492 function Plot(placeholder, data_, options_, plugins) { |
|
493 // data is on the form: |
|
494 // [ series1, series2 ... ] |
|
495 // where series is either just the data as [ [x1, y1], [x2, y2], ... ] |
|
496 // or { data: [ [x1, y1], [x2, y2], ... ], label: "some label", ... } |
|
497 |
|
498 var series = [], |
|
499 options = { |
|
500 // the color theme used for graphs |
|
501 colors: ["#edc240", "#afd8f8", "#cb4b4b", "#4da74d", "#9440ed"], |
|
502 legend: { |
|
503 show: true, |
|
504 noColumns: 1, // number of colums in legend table |
|
505 labelFormatter: null, // fn: string -> string |
|
506 labelBoxBorderColor: "#ccc", // border color for the little label boxes |
|
507 container: null, // container (as jQuery object) to put legend in, null means default on top of graph |
|
508 position: "ne", // position of default legend container within plot |
|
509 margin: 5, // distance from grid edge to default legend container within plot |
|
510 backgroundColor: null, // null means auto-detect |
|
511 backgroundOpacity: 0.85, // set to 0 to avoid background |
|
512 sorted: null // default to no legend sorting |
|
513 }, |
|
514 xaxis: { |
|
515 show: null, // null = auto-detect, true = always, false = never |
|
516 position: "bottom", // or "top" |
|
517 mode: null, // null or "time" |
|
518 font: null, // null (derived from CSS in placeholder) or object like { size: 11, lineHeight: 13, style: "italic", weight: "bold", family: "sans-serif", variant: "small-caps" } |
|
519 color: null, // base color, labels, ticks |
|
520 tickColor: null, // possibly different color of ticks, e.g. "rgba(0,0,0,0.15)" |
|
521 transform: null, // null or f: number -> number to transform axis |
|
522 inverseTransform: null, // if transform is set, this should be the inverse function |
|
523 min: null, // min. value to show, null means set automatically |
|
524 max: null, // max. value to show, null means set automatically |
|
525 autoscaleMargin: null, // margin in % to add if auto-setting min/max |
|
526 ticks: null, // either [1, 3] or [[1, "a"], 3] or (fn: axis info -> ticks) or app. number of ticks for auto-ticks |
|
527 tickFormatter: null, // fn: number -> string |
|
528 labelWidth: null, // size of tick labels in pixels |
|
529 labelHeight: null, |
|
530 reserveSpace: null, // whether to reserve space even if axis isn't shown |
|
531 tickLength: null, // size in pixels of ticks, or "full" for whole line |
|
532 alignTicksWithAxis: null, // axis number or null for no sync |
|
533 tickDecimals: null, // no. of decimals, null means auto |
|
534 tickSize: null, // number or [number, "unit"] |
|
535 minTickSize: null // number or [number, "unit"] |
|
536 }, |
|
537 yaxis: { |
|
538 autoscaleMargin: 0.02, |
|
539 position: "left" // or "right" |
|
540 }, |
|
541 xaxes: [], |
|
542 yaxes: [], |
|
543 series: { |
|
544 points: { |
|
545 show: false, |
|
546 radius: 3, |
|
547 lineWidth: 2, // in pixels |
|
548 fill: true, |
|
549 fillColor: "#ffffff", |
|
550 symbol: "circle" // or callback |
|
551 }, |
|
552 lines: { |
|
553 // we don't put in show: false so we can see |
|
554 // whether lines were actively disabled |
|
555 lineWidth: 2, // in pixels |
|
556 fill: false, |
|
557 fillColor: null, |
|
558 steps: false |
|
559 // Omit 'zero', so we can later default its value to |
|
560 // match that of the 'fill' option. |
|
561 }, |
|
562 bars: { |
|
563 show: false, |
|
564 lineWidth: 2, // in pixels |
|
565 barWidth: 1, // in units of the x axis |
|
566 fill: true, |
|
567 fillColor: null, |
|
568 align: "left", // "left", "right", or "center" |
|
569 horizontal: false, |
|
570 zero: true |
|
571 }, |
|
572 shadowSize: 3, |
|
573 highlightColor: null |
|
574 }, |
|
575 grid: { |
|
576 show: true, |
|
577 aboveData: false, |
|
578 color: "#545454", // primary color used for outline and labels |
|
579 backgroundColor: null, // null for transparent, else color |
|
580 borderColor: null, // set if different from the grid color |
|
581 tickColor: null, // color for the ticks, e.g. "rgba(0,0,0,0.15)" |
|
582 margin: 0, // distance from the canvas edge to the grid |
|
583 labelMargin: 5, // in pixels |
|
584 axisMargin: 8, // in pixels |
|
585 borderWidth: 2, // in pixels |
|
586 minBorderMargin: null, // in pixels, null means taken from points radius |
|
587 markings: null, // array of ranges or fn: axes -> array of ranges |
|
588 markingsColor: "#f4f4f4", |
|
589 markingsLineWidth: 2, |
|
590 // interactive stuff |
|
591 clickable: false, |
|
592 hoverable: false, |
|
593 autoHighlight: true, // highlight in case mouse is near |
|
594 mouseActiveRadius: 10 // how far the mouse can be away to activate an item |
|
595 }, |
|
596 interaction: { |
|
597 redrawOverlayInterval: 1000/60 // time between updates, -1 means in same flow |
|
598 }, |
|
599 hooks: {} |
|
600 }, |
|
601 surface = null, // the canvas for the plot itself |
|
602 overlay = null, // canvas for interactive stuff on top of plot |
|
603 eventHolder = null, // jQuery object that events should be bound to |
|
604 ctx = null, octx = null, |
|
605 xaxes = [], yaxes = [], |
|
606 plotOffset = { left: 0, right: 0, top: 0, bottom: 0}, |
|
607 plotWidth = 0, plotHeight = 0, |
|
608 hooks = { |
|
609 processOptions: [], |
|
610 processRawData: [], |
|
611 processDatapoints: [], |
|
612 processOffset: [], |
|
613 drawBackground: [], |
|
614 drawSeries: [], |
|
615 draw: [], |
|
616 bindEvents: [], |
|
617 drawOverlay: [], |
|
618 shutdown: [] |
|
619 }, |
|
620 plot = this; |
|
621 |
|
622 // public functions |
|
623 plot.setData = setData; |
|
624 plot.setupGrid = setupGrid; |
|
625 plot.draw = draw; |
|
626 plot.getPlaceholder = function() { return placeholder; }; |
|
627 plot.getCanvas = function() { return surface.element; }; |
|
628 plot.getPlotOffset = function() { return plotOffset; }; |
|
629 plot.width = function () { return plotWidth; }; |
|
630 plot.height = function () { return plotHeight; }; |
|
631 plot.offset = function () { |
|
632 var o = eventHolder.offset(); |
|
633 o.left += plotOffset.left; |
|
634 o.top += plotOffset.top; |
|
635 return o; |
|
636 }; |
|
637 plot.getData = function () { return series; }; |
|
638 plot.getAxes = function () { |
|
639 var res = {}, i; |
|
640 $.each(xaxes.concat(yaxes), function (_, axis) { |
|
641 if (axis) |
|
642 res[axis.direction + (axis.n != 1 ? axis.n : "") + "axis"] = axis; |
|
643 }); |
|
644 return res; |
|
645 }; |
|
646 plot.getXAxes = function () { return xaxes; }; |
|
647 plot.getYAxes = function () { return yaxes; }; |
|
648 plot.c2p = canvasToAxisCoords; |
|
649 plot.p2c = axisToCanvasCoords; |
|
650 plot.getOptions = function () { return options; }; |
|
651 plot.highlight = highlight; |
|
652 plot.unhighlight = unhighlight; |
|
653 plot.triggerRedrawOverlay = triggerRedrawOverlay; |
|
654 plot.pointOffset = function(point) { |
|
655 return { |
|
656 left: parseInt(xaxes[axisNumber(point, "x") - 1].p2c(+point.x) + plotOffset.left, 10), |
|
657 top: parseInt(yaxes[axisNumber(point, "y") - 1].p2c(+point.y) + plotOffset.top, 10) |
|
658 }; |
|
659 }; |
|
660 plot.shutdown = shutdown; |
|
661 plot.resize = function () { |
|
662 var width = placeholder.width(), |
|
663 height = placeholder.height(); |
|
664 surface.resize(width, height); |
|
665 overlay.resize(width, height); |
|
666 }; |
|
667 |
|
668 // public attributes |
|
669 plot.hooks = hooks; |
|
670 |
|
671 // initialize |
|
672 initPlugins(plot); |
|
673 parseOptions(options_); |
|
674 setupCanvases(); |
|
675 setData(data_); |
|
676 setupGrid(); |
|
677 draw(); |
|
678 bindEvents(); |
|
679 |
|
680 |
|
681 function executeHooks(hook, args) { |
|
682 args = [plot].concat(args); |
|
683 for (var i = 0; i < hook.length; ++i) |
|
684 hook[i].apply(this, args); |
|
685 } |
|
686 |
|
687 function initPlugins() { |
|
688 |
|
689 // References to key classes, allowing plugins to modify them |
|
690 |
|
691 var classes = { |
|
692 Canvas: Canvas |
|
693 }; |
|
694 |
|
695 for (var i = 0; i < plugins.length; ++i) { |
|
696 var p = plugins[i]; |
|
697 p.init(plot, classes); |
|
698 if (p.options) |
|
699 $.extend(true, options, p.options); |
|
700 } |
|
701 } |
|
702 |
|
703 function parseOptions(opts) { |
|
704 |
|
705 $.extend(true, options, opts); |
|
706 |
|
707 // $.extend merges arrays, rather than replacing them. When less |
|
708 // colors are provided than the size of the default palette, we |
|
709 // end up with those colors plus the remaining defaults, which is |
|
710 // not expected behavior; avoid it by replacing them here. |
|
711 |
|
712 if (opts && opts.colors) { |
|
713 options.colors = opts.colors; |
|
714 } |
|
715 |
|
716 if (options.xaxis.color == null) |
|
717 options.xaxis.color = $.color.parse(options.grid.color).scale('a', 0.22).toString(); |
|
718 if (options.yaxis.color == null) |
|
719 options.yaxis.color = $.color.parse(options.grid.color).scale('a', 0.22).toString(); |
|
720 |
|
721 if (options.xaxis.tickColor == null) // grid.tickColor for back-compatibility |
|
722 options.xaxis.tickColor = options.grid.tickColor || options.xaxis.color; |
|
723 if (options.yaxis.tickColor == null) // grid.tickColor for back-compatibility |
|
724 options.yaxis.tickColor = options.grid.tickColor || options.yaxis.color; |
|
725 |
|
726 if (options.grid.borderColor == null) |
|
727 options.grid.borderColor = options.grid.color; |
|
728 if (options.grid.tickColor == null) |
|
729 options.grid.tickColor = $.color.parse(options.grid.color).scale('a', 0.22).toString(); |
|
730 |
|
731 // Fill in defaults for axis options, including any unspecified |
|
732 // font-spec fields, if a font-spec was provided. |
|
733 |
|
734 // If no x/y axis options were provided, create one of each anyway, |
|
735 // since the rest of the code assumes that they exist. |
|
736 |
|
737 var i, axisOptions, axisCount, |
|
738 fontDefaults = { |
|
739 style: placeholder.css("font-style"), |
|
740 size: Math.round(0.8 * (+placeholder.css("font-size").replace("px", "") || 13)), |
|
741 variant: placeholder.css("font-variant"), |
|
742 weight: placeholder.css("font-weight"), |
|
743 family: placeholder.css("font-family") |
|
744 }; |
|
745 |
|
746 fontDefaults.lineHeight = fontDefaults.size * 1.15; |
|
747 |
|
748 axisCount = options.xaxes.length || 1; |
|
749 for (i = 0; i < axisCount; ++i) { |
|
750 |
|
751 axisOptions = options.xaxes[i]; |
|
752 if (axisOptions && !axisOptions.tickColor) { |
|
753 axisOptions.tickColor = axisOptions.color; |
|
754 } |
|
755 |
|
756 axisOptions = $.extend(true, {}, options.xaxis, axisOptions); |
|
757 options.xaxes[i] = axisOptions; |
|
758 |
|
759 if (axisOptions.font) { |
|
760 axisOptions.font = $.extend({}, fontDefaults, axisOptions.font); |
|
761 if (!axisOptions.font.color) { |
|
762 axisOptions.font.color = axisOptions.color; |
|
763 } |
|
764 } |
|
765 } |
|
766 |
|
767 axisCount = options.yaxes.length || 1; |
|
768 for (i = 0; i < axisCount; ++i) { |
|
769 |
|
770 axisOptions = options.yaxes[i]; |
|
771 if (axisOptions && !axisOptions.tickColor) { |
|
772 axisOptions.tickColor = axisOptions.color; |
|
773 } |
|
774 |
|
775 axisOptions = $.extend(true, {}, options.yaxis, axisOptions); |
|
776 options.yaxes[i] = axisOptions; |
|
777 |
|
778 if (axisOptions.font) { |
|
779 axisOptions.font = $.extend({}, fontDefaults, axisOptions.font); |
|
780 if (!axisOptions.font.color) { |
|
781 axisOptions.font.color = axisOptions.color; |
|
782 } |
|
783 } |
|
784 } |
|
785 |
|
786 // backwards compatibility, to be removed in future |
|
787 if (options.xaxis.noTicks && options.xaxis.ticks == null) |
|
788 options.xaxis.ticks = options.xaxis.noTicks; |
|
789 if (options.yaxis.noTicks && options.yaxis.ticks == null) |
|
790 options.yaxis.ticks = options.yaxis.noTicks; |
|
791 if (options.x2axis) { |
|
792 options.xaxes[1] = $.extend(true, {}, options.xaxis, options.x2axis); |
|
793 options.xaxes[1].position = "top"; |
|
794 } |
|
795 if (options.y2axis) { |
|
796 options.yaxes[1] = $.extend(true, {}, options.yaxis, options.y2axis); |
|
797 options.yaxes[1].position = "right"; |
|
798 } |
|
799 if (options.grid.coloredAreas) |
|
800 options.grid.markings = options.grid.coloredAreas; |
|
801 if (options.grid.coloredAreasColor) |
|
802 options.grid.markingsColor = options.grid.coloredAreasColor; |
|
803 if (options.lines) |
|
804 $.extend(true, options.series.lines, options.lines); |
|
805 if (options.points) |
|
806 $.extend(true, options.series.points, options.points); |
|
807 if (options.bars) |
|
808 $.extend(true, options.series.bars, options.bars); |
|
809 if (options.shadowSize != null) |
|
810 options.series.shadowSize = options.shadowSize; |
|
811 if (options.highlightColor != null) |
|
812 options.series.highlightColor = options.highlightColor; |
|
813 |
|
814 // save options on axes for future reference |
|
815 for (i = 0; i < options.xaxes.length; ++i) |
|
816 getOrCreateAxis(xaxes, i + 1).options = options.xaxes[i]; |
|
817 for (i = 0; i < options.yaxes.length; ++i) |
|
818 getOrCreateAxis(yaxes, i + 1).options = options.yaxes[i]; |
|
819 |
|
820 // add hooks from options |
|
821 for (var n in hooks) |
|
822 if (options.hooks[n] && options.hooks[n].length) |
|
823 hooks[n] = hooks[n].concat(options.hooks[n]); |
|
824 |
|
825 executeHooks(hooks.processOptions, [options]); |
|
826 } |
|
827 |
|
828 function setData(d) { |
|
829 series = parseData(d); |
|
830 fillInSeriesOptions(); |
|
831 processData(); |
|
832 } |
|
833 |
|
834 function parseData(d) { |
|
835 var res = []; |
|
836 for (var i = 0; i < d.length; ++i) { |
|
837 var s = $.extend(true, {}, options.series); |
|
838 |
|
839 if (d[i].data != null) { |
|
840 s.data = d[i].data; // move the data instead of deep-copy |
|
841 delete d[i].data; |
|
842 |
|
843 $.extend(true, s, d[i]); |
|
844 |
|
845 d[i].data = s.data; |
|
846 } |
|
847 else |
|
848 s.data = d[i]; |
|
849 res.push(s); |
|
850 } |
|
851 |
|
852 return res; |
|
853 } |
|
854 |
|
855 function axisNumber(obj, coord) { |
|
856 var a = obj[coord + "axis"]; |
|
857 if (typeof a == "object") // if we got a real axis, extract number |
|
858 a = a.n; |
|
859 if (typeof a != "number") |
|
860 a = 1; // default to first axis |
|
861 return a; |
|
862 } |
|
863 |
|
864 function allAxes() { |
|
865 // return flat array without annoying null entries |
|
866 return $.grep(xaxes.concat(yaxes), function (a) { return a; }); |
|
867 } |
|
868 |
|
869 function canvasToAxisCoords(pos) { |
|
870 // return an object with x/y corresponding to all used axes |
|
871 var res = {}, i, axis; |
|
872 for (i = 0; i < xaxes.length; ++i) { |
|
873 axis = xaxes[i]; |
|
874 if (axis && axis.used) |
|
875 res["x" + axis.n] = axis.c2p(pos.left); |
|
876 } |
|
877 |
|
878 for (i = 0; i < yaxes.length; ++i) { |
|
879 axis = yaxes[i]; |
|
880 if (axis && axis.used) |
|
881 res["y" + axis.n] = axis.c2p(pos.top); |
|
882 } |
|
883 |
|
884 if (res.x1 !== undefined) |
|
885 res.x = res.x1; |
|
886 if (res.y1 !== undefined) |
|
887 res.y = res.y1; |
|
888 |
|
889 return res; |
|
890 } |
|
891 |
|
892 function axisToCanvasCoords(pos) { |
|
893 // get canvas coords from the first pair of x/y found in pos |
|
894 var res = {}, i, axis, key; |
|
895 |
|
896 for (i = 0; i < xaxes.length; ++i) { |
|
897 axis = xaxes[i]; |
|
898 if (axis && axis.used) { |
|
899 key = "x" + axis.n; |
|
900 if (pos[key] == null && axis.n == 1) |
|
901 key = "x"; |
|
902 |
|
903 if (pos[key] != null) { |
|
904 res.left = axis.p2c(pos[key]); |
|
905 break; |
|
906 } |
|
907 } |
|
908 } |
|
909 |
|
910 for (i = 0; i < yaxes.length; ++i) { |
|
911 axis = yaxes[i]; |
|
912 if (axis && axis.used) { |
|
913 key = "y" + axis.n; |
|
914 if (pos[key] == null && axis.n == 1) |
|
915 key = "y"; |
|
916 |
|
917 if (pos[key] != null) { |
|
918 res.top = axis.p2c(pos[key]); |
|
919 break; |
|
920 } |
|
921 } |
|
922 } |
|
923 |
|
924 return res; |
|
925 } |
|
926 |
|
927 function getOrCreateAxis(axes, number) { |
|
928 if (!axes[number - 1]) |
|
929 axes[number - 1] = { |
|
930 n: number, // save the number for future reference |
|
931 direction: axes == xaxes ? "x" : "y", |
|
932 options: $.extend(true, {}, axes == xaxes ? options.xaxis : options.yaxis) |
|
933 }; |
|
934 |
|
935 return axes[number - 1]; |
|
936 } |
|
937 |
|
938 function fillInSeriesOptions() { |
|
939 |
|
940 var neededColors = series.length, maxIndex = -1, i; |
|
941 |
|
942 // Subtract the number of series that already have fixed colors or |
|
943 // color indexes from the number that we still need to generate. |
|
944 |
|
945 for (i = 0; i < series.length; ++i) { |
|
946 var sc = series[i].color; |
|
947 if (sc != null) { |
|
948 neededColors--; |
|
949 if (typeof sc == "number" && sc > maxIndex) { |
|
950 maxIndex = sc; |
|
951 } |
|
952 } |
|
953 } |
|
954 |
|
955 // If any of the series have fixed color indexes, then we need to |
|
956 // generate at least as many colors as the highest index. |
|
957 |
|
958 if (neededColors <= maxIndex) { |
|
959 neededColors = maxIndex + 1; |
|
960 } |
|
961 |
|
962 // Generate all the colors, using first the option colors and then |
|
963 // variations on those colors once they're exhausted. |
|
964 |
|
965 var c, colors = [], colorPool = options.colors, |
|
966 colorPoolSize = colorPool.length, variation = 0; |
|
967 |
|
968 for (i = 0; i < neededColors; i++) { |
|
969 |
|
970 c = $.color.parse(colorPool[i % colorPoolSize] || "#666"); |
|
971 |
|
972 // Each time we exhaust the colors in the pool we adjust |
|
973 // a scaling factor used to produce more variations on |
|
974 // those colors. The factor alternates negative/positive |
|
975 // to produce lighter/darker colors. |
|
976 |
|
977 // Reset the variation after every few cycles, or else |
|
978 // it will end up producing only white or black colors. |
|
979 |
|
980 if (i % colorPoolSize == 0 && i) { |
|
981 if (variation >= 0) { |
|
982 if (variation < 0.5) { |
|
983 variation = -variation - 0.2; |
|
984 } else variation = 0; |
|
985 } else variation = -variation; |
|
986 } |
|
987 |
|
988 colors[i] = c.scale('rgb', 1 + variation); |
|
989 } |
|
990 |
|
991 // Finalize the series options, filling in their colors |
|
992 |
|
993 var colori = 0, s; |
|
994 for (i = 0; i < series.length; ++i) { |
|
995 s = series[i]; |
|
996 |
|
997 // assign colors |
|
998 if (s.color == null) { |
|
999 s.color = colors[colori].toString(); |
|
1000 ++colori; |
|
1001 } |
|
1002 else if (typeof s.color == "number") |
|
1003 s.color = colors[s.color].toString(); |
|
1004 |
|
1005 // turn on lines automatically in case nothing is set |
|
1006 if (s.lines.show == null) { |
|
1007 var v, show = true; |
|
1008 for (v in s) |
|
1009 if (s[v] && s[v].show) { |
|
1010 show = false; |
|
1011 break; |
|
1012 } |
|
1013 if (show) |
|
1014 s.lines.show = true; |
|
1015 } |
|
1016 |
|
1017 // If nothing was provided for lines.zero, default it to match |
|
1018 // lines.fill, since areas by default should extend to zero. |
|
1019 |
|
1020 if (s.lines.zero == null) { |
|
1021 s.lines.zero = !!s.lines.fill; |
|
1022 } |
|
1023 |
|
1024 // setup axes |
|
1025 s.xaxis = getOrCreateAxis(xaxes, axisNumber(s, "x")); |
|
1026 s.yaxis = getOrCreateAxis(yaxes, axisNumber(s, "y")); |
|
1027 } |
|
1028 } |
|
1029 |
|
1030 function processData() { |
|
1031 var topSentry = Number.POSITIVE_INFINITY, |
|
1032 bottomSentry = Number.NEGATIVE_INFINITY, |
|
1033 fakeInfinity = Number.MAX_VALUE, |
|
1034 i, j, k, m, length, |
|
1035 s, points, ps, x, y, axis, val, f, p, |
|
1036 data, format; |
|
1037 |
|
1038 function updateAxis(axis, min, max) { |
|
1039 if (min < axis.datamin && min != -fakeInfinity) |
|
1040 axis.datamin = min; |
|
1041 if (max > axis.datamax && max != fakeInfinity) |
|
1042 axis.datamax = max; |
|
1043 } |
|
1044 |
|
1045 $.each(allAxes(), function (_, axis) { |
|
1046 // init axis |
|
1047 axis.datamin = topSentry; |
|
1048 axis.datamax = bottomSentry; |
|
1049 axis.used = false; |
|
1050 }); |
|
1051 |
|
1052 for (i = 0; i < series.length; ++i) { |
|
1053 s = series[i]; |
|
1054 s.datapoints = { points: [] }; |
|
1055 |
|
1056 executeHooks(hooks.processRawData, [ s, s.data, s.datapoints ]); |
|
1057 } |
|
1058 |
|
1059 // first pass: clean and copy data |
|
1060 for (i = 0; i < series.length; ++i) { |
|
1061 s = series[i]; |
|
1062 |
|
1063 data = s.data; |
|
1064 format = s.datapoints.format; |
|
1065 |
|
1066 if (!format) { |
|
1067 format = []; |
|
1068 // find out how to copy |
|
1069 format.push({ x: true, number: true, required: true }); |
|
1070 format.push({ y: true, number: true, required: true }); |
|
1071 |
|
1072 if (s.bars.show || (s.lines.show && s.lines.fill)) { |
|
1073 var autoscale = !!((s.bars.show && s.bars.zero) || (s.lines.show && s.lines.zero)); |
|
1074 format.push({ y: true, number: true, required: false, defaultValue: 0, autoscale: autoscale }); |
|
1075 if (s.bars.horizontal) { |
|
1076 delete format[format.length - 1].y; |
|
1077 format[format.length - 1].x = true; |
|
1078 } |
|
1079 } |
|
1080 |
|
1081 s.datapoints.format = format; |
|
1082 } |
|
1083 |
|
1084 if (s.datapoints.pointsize != null) |
|
1085 continue; // already filled in |
|
1086 |
|
1087 s.datapoints.pointsize = format.length; |
|
1088 |
|
1089 ps = s.datapoints.pointsize; |
|
1090 points = s.datapoints.points; |
|
1091 |
|
1092 var insertSteps = s.lines.show && s.lines.steps; |
|
1093 s.xaxis.used = s.yaxis.used = true; |
|
1094 |
|
1095 for (j = k = 0; j < data.length; ++j, k += ps) { |
|
1096 p = data[j]; |
|
1097 |
|
1098 var nullify = p == null; |
|
1099 if (!nullify) { |
|
1100 for (m = 0; m < ps; ++m) { |
|
1101 val = p[m]; |
|
1102 f = format[m]; |
|
1103 |
|
1104 if (f) { |
|
1105 if (f.number && val != null) { |
|
1106 val = +val; // convert to number |
|
1107 if (isNaN(val)) |
|
1108 val = null; |
|
1109 else if (val == Infinity) |
|
1110 val = fakeInfinity; |
|
1111 else if (val == -Infinity) |
|
1112 val = -fakeInfinity; |
|
1113 } |
|
1114 |
|
1115 if (val == null) { |
|
1116 if (f.required) |
|
1117 nullify = true; |
|
1118 |
|
1119 if (f.defaultValue != null) |
|
1120 val = f.defaultValue; |
|
1121 } |
|
1122 } |
|
1123 |
|
1124 points[k + m] = val; |
|
1125 } |
|
1126 } |
|
1127 |
|
1128 if (nullify) { |
|
1129 for (m = 0; m < ps; ++m) { |
|
1130 val = points[k + m]; |
|
1131 if (val != null) { |
|
1132 f = format[m]; |
|
1133 // extract min/max info |
|
1134 if (f.autoscale) { |
|
1135 if (f.x) { |
|
1136 updateAxis(s.xaxis, val, val); |
|
1137 } |
|
1138 if (f.y) { |
|
1139 updateAxis(s.yaxis, val, val); |
|
1140 } |
|
1141 } |
|
1142 } |
|
1143 points[k + m] = null; |
|
1144 } |
|
1145 } |
|
1146 else { |
|
1147 // a little bit of line specific stuff that |
|
1148 // perhaps shouldn't be here, but lacking |
|
1149 // better means... |
|
1150 if (insertSteps && k > 0 |
|
1151 && points[k - ps] != null |
|
1152 && points[k - ps] != points[k] |
|
1153 && points[k - ps + 1] != points[k + 1]) { |
|
1154 // copy the point to make room for a middle point |
|
1155 for (m = 0; m < ps; ++m) |
|
1156 points[k + ps + m] = points[k + m]; |
|
1157 |
|
1158 // middle point has same y |
|
1159 points[k + 1] = points[k - ps + 1]; |
|
1160 |
|
1161 // we've added a point, better reflect that |
|
1162 k += ps; |
|
1163 } |
|
1164 } |
|
1165 } |
|
1166 } |
|
1167 |
|
1168 // give the hooks a chance to run |
|
1169 for (i = 0; i < series.length; ++i) { |
|
1170 s = series[i]; |
|
1171 |
|
1172 executeHooks(hooks.processDatapoints, [ s, s.datapoints]); |
|
1173 } |
|
1174 |
|
1175 // second pass: find datamax/datamin for auto-scaling |
|
1176 for (i = 0; i < series.length; ++i) { |
|
1177 s = series[i]; |
|
1178 points = s.datapoints.points; |
|
1179 ps = s.datapoints.pointsize; |
|
1180 format = s.datapoints.format; |
|
1181 |
|
1182 var xmin = topSentry, ymin = topSentry, |
|
1183 xmax = bottomSentry, ymax = bottomSentry; |
|
1184 |
|
1185 for (j = 0; j < points.length; j += ps) { |
|
1186 if (points[j] == null) |
|
1187 continue; |
|
1188 |
|
1189 for (m = 0; m < ps; ++m) { |
|
1190 val = points[j + m]; |
|
1191 f = format[m]; |
|
1192 if (!f || f.autoscale === false || val == fakeInfinity || val == -fakeInfinity) |
|
1193 continue; |
|
1194 |
|
1195 if (f.x) { |
|
1196 if (val < xmin) |
|
1197 xmin = val; |
|
1198 if (val > xmax) |
|
1199 xmax = val; |
|
1200 } |
|
1201 if (f.y) { |
|
1202 if (val < ymin) |
|
1203 ymin = val; |
|
1204 if (val > ymax) |
|
1205 ymax = val; |
|
1206 } |
|
1207 } |
|
1208 } |
|
1209 |
|
1210 if (s.bars.show) { |
|
1211 // make sure we got room for the bar on the dancing floor |
|
1212 var delta; |
|
1213 |
|
1214 switch (s.bars.align) { |
|
1215 case "left": |
|
1216 delta = 0; |
|
1217 break; |
|
1218 case "right": |
|
1219 delta = -s.bars.barWidth; |
|
1220 break; |
|
1221 case "center": |
|
1222 delta = -s.bars.barWidth / 2; |
|
1223 break; |
|
1224 default: |
|
1225 throw new Error("Invalid bar alignment: " + s.bars.align); |
|
1226 } |
|
1227 |
|
1228 if (s.bars.horizontal) { |
|
1229 ymin += delta; |
|
1230 ymax += delta + s.bars.barWidth; |
|
1231 } |
|
1232 else { |
|
1233 xmin += delta; |
|
1234 xmax += delta + s.bars.barWidth; |
|
1235 } |
|
1236 } |
|
1237 |
|
1238 updateAxis(s.xaxis, xmin, xmax); |
|
1239 updateAxis(s.yaxis, ymin, ymax); |
|
1240 } |
|
1241 |
|
1242 $.each(allAxes(), function (_, axis) { |
|
1243 if (axis.datamin == topSentry) |
|
1244 axis.datamin = null; |
|
1245 if (axis.datamax == bottomSentry) |
|
1246 axis.datamax = null; |
|
1247 }); |
|
1248 } |
|
1249 |
|
1250 function setupCanvases() { |
|
1251 |
|
1252 // Make sure the placeholder is clear of everything except canvases |
|
1253 // from a previous plot in this container that we'll try to re-use. |
|
1254 |
|
1255 placeholder.css("padding", 0) // padding messes up the positioning |
|
1256 .children(":not(.flot-base,.flot-overlay)").remove(); |
|
1257 |
|
1258 if (placeholder.css("position") == 'static') |
|
1259 placeholder.css("position", "relative"); // for positioning labels and overlay |
|
1260 |
|
1261 surface = new Canvas("flot-base", placeholder); |
|
1262 overlay = new Canvas("flot-overlay", placeholder); // overlay canvas for interactive features |
|
1263 |
|
1264 ctx = surface.context; |
|
1265 octx = overlay.context; |
|
1266 |
|
1267 // define which element we're listening for events on |
|
1268 eventHolder = $(overlay.element).unbind(); |
|
1269 |
|
1270 // If we're re-using a plot object, shut down the old one |
|
1271 |
|
1272 var existing = placeholder.data("plot"); |
|
1273 |
|
1274 if (existing) { |
|
1275 existing.shutdown(); |
|
1276 overlay.clear(); |
|
1277 } |
|
1278 |
|
1279 // save in case we get replotted |
|
1280 placeholder.data("plot", plot); |
|
1281 } |
|
1282 |
|
1283 function bindEvents() { |
|
1284 // bind events |
|
1285 if (options.grid.hoverable) { |
|
1286 eventHolder.mousemove(onMouseMove); |
|
1287 |
|
1288 // Use bind, rather than .mouseleave, because we officially |
|
1289 // still support jQuery 1.2.6, which doesn't define a shortcut |
|
1290 // for mouseenter or mouseleave. This was a bug/oversight that |
|
1291 // was fixed somewhere around 1.3.x. We can return to using |
|
1292 // .mouseleave when we drop support for 1.2.6. |
|
1293 |
|
1294 eventHolder.bind("mouseleave", onMouseLeave); |
|
1295 } |
|
1296 |
|
1297 if (options.grid.clickable) |
|
1298 eventHolder.click(onClick); |
|
1299 |
|
1300 executeHooks(hooks.bindEvents, [eventHolder]); |
|
1301 } |
|
1302 |
|
1303 function shutdown() { |
|
1304 if (redrawTimeout) |
|
1305 clearTimeout(redrawTimeout); |
|
1306 |
|
1307 eventHolder.unbind("mousemove", onMouseMove); |
|
1308 eventHolder.unbind("mouseleave", onMouseLeave); |
|
1309 eventHolder.unbind("click", onClick); |
|
1310 |
|
1311 executeHooks(hooks.shutdown, [eventHolder]); |
|
1312 } |
|
1313 |
|
1314 function setTransformationHelpers(axis) { |
|
1315 // set helper functions on the axis, assumes plot area |
|
1316 // has been computed already |
|
1317 |
|
1318 function identity(x) { return x; } |
|
1319 |
|
1320 var s, m, t = axis.options.transform || identity, |
|
1321 it = axis.options.inverseTransform; |
|
1322 |
|
1323 // precompute how much the axis is scaling a point |
|
1324 // in canvas space |
|
1325 if (axis.direction == "x") { |
|
1326 s = axis.scale = plotWidth / Math.abs(t(axis.max) - t(axis.min)); |
|
1327 m = Math.min(t(axis.max), t(axis.min)); |
|
1328 } |
|
1329 else { |
|
1330 s = axis.scale = plotHeight / Math.abs(t(axis.max) - t(axis.min)); |
|
1331 s = -s; |
|
1332 m = Math.max(t(axis.max), t(axis.min)); |
|
1333 } |
|
1334 |
|
1335 // data point to canvas coordinate |
|
1336 if (t == identity) // slight optimization |
|
1337 axis.p2c = function (p) { return (p - m) * s; }; |
|
1338 else |
|
1339 axis.p2c = function (p) { return (t(p) - m) * s; }; |
|
1340 // canvas coordinate to data point |
|
1341 if (!it) |
|
1342 axis.c2p = function (c) { return m + c / s; }; |
|
1343 else |
|
1344 axis.c2p = function (c) { return it(m + c / s); }; |
|
1345 } |
|
1346 |
|
1347 function measureTickLabels(axis) { |
|
1348 |
|
1349 var opts = axis.options, |
|
1350 ticks = axis.ticks || [], |
|
1351 labelWidth = opts.labelWidth || 0, |
|
1352 labelHeight = opts.labelHeight || 0, |
|
1353 maxWidth = labelWidth || axis.direction == "x" ? Math.floor(surface.width / (ticks.length || 1)) : null; |
|
1354 legacyStyles = axis.direction + "Axis " + axis.direction + axis.n + "Axis", |
|
1355 layer = "flot-" + axis.direction + "-axis flot-" + axis.direction + axis.n + "-axis " + legacyStyles, |
|
1356 font = opts.font || "flot-tick-label tickLabel"; |
|
1357 |
|
1358 for (var i = 0; i < ticks.length; ++i) { |
|
1359 |
|
1360 var t = ticks[i]; |
|
1361 |
|
1362 if (!t.label) |
|
1363 continue; |
|
1364 |
|
1365 var info = surface.getTextInfo(layer, t.label, font, null, maxWidth); |
|
1366 |
|
1367 labelWidth = Math.max(labelWidth, info.width); |
|
1368 labelHeight = Math.max(labelHeight, info.height); |
|
1369 } |
|
1370 |
|
1371 axis.labelWidth = opts.labelWidth || labelWidth; |
|
1372 axis.labelHeight = opts.labelHeight || labelHeight; |
|
1373 } |
|
1374 |
|
1375 function allocateAxisBoxFirstPhase(axis) { |
|
1376 // find the bounding box of the axis by looking at label |
|
1377 // widths/heights and ticks, make room by diminishing the |
|
1378 // plotOffset; this first phase only looks at one |
|
1379 // dimension per axis, the other dimension depends on the |
|
1380 // other axes so will have to wait |
|
1381 |
|
1382 var lw = axis.labelWidth, |
|
1383 lh = axis.labelHeight, |
|
1384 pos = axis.options.position, |
|
1385 tickLength = axis.options.tickLength, |
|
1386 axisMargin = options.grid.axisMargin, |
|
1387 padding = options.grid.labelMargin, |
|
1388 all = axis.direction == "x" ? xaxes : yaxes, |
|
1389 index, innermost; |
|
1390 |
|
1391 // determine axis margin |
|
1392 var samePosition = $.grep(all, function (a) { |
|
1393 return a && a.options.position == pos && a.reserveSpace; |
|
1394 }); |
|
1395 if ($.inArray(axis, samePosition) == samePosition.length - 1) |
|
1396 axisMargin = 0; // outermost |
|
1397 |
|
1398 // determine tick length - if we're innermost, we can use "full" |
|
1399 if (tickLength == null) { |
|
1400 var sameDirection = $.grep(all, function (a) { |
|
1401 return a && a.reserveSpace; |
|
1402 }); |
|
1403 |
|
1404 innermost = $.inArray(axis, sameDirection) == 0; |
|
1405 if (innermost) |
|
1406 tickLength = "full"; |
|
1407 else |
|
1408 tickLength = 5; |
|
1409 } |
|
1410 |
|
1411 if (!isNaN(+tickLength)) |
|
1412 padding += +tickLength; |
|
1413 |
|
1414 // compute box |
|
1415 if (axis.direction == "x") { |
|
1416 lh += padding; |
|
1417 |
|
1418 if (pos == "bottom") { |
|
1419 plotOffset.bottom += lh + axisMargin; |
|
1420 axis.box = { top: surface.height - plotOffset.bottom, height: lh }; |
|
1421 } |
|
1422 else { |
|
1423 axis.box = { top: plotOffset.top + axisMargin, height: lh }; |
|
1424 plotOffset.top += lh + axisMargin; |
|
1425 } |
|
1426 } |
|
1427 else { |
|
1428 lw += padding; |
|
1429 |
|
1430 if (pos == "left") { |
|
1431 axis.box = { left: plotOffset.left + axisMargin, width: lw }; |
|
1432 plotOffset.left += lw + axisMargin; |
|
1433 } |
|
1434 else { |
|
1435 plotOffset.right += lw + axisMargin; |
|
1436 axis.box = { left: surface.width - plotOffset.right, width: lw }; |
|
1437 } |
|
1438 } |
|
1439 |
|
1440 // save for future reference |
|
1441 axis.position = pos; |
|
1442 axis.tickLength = tickLength; |
|
1443 axis.box.padding = padding; |
|
1444 axis.innermost = innermost; |
|
1445 } |
|
1446 |
|
1447 function allocateAxisBoxSecondPhase(axis) { |
|
1448 // now that all axis boxes have been placed in one |
|
1449 // dimension, we can set the remaining dimension coordinates |
|
1450 if (axis.direction == "x") { |
|
1451 axis.box.left = plotOffset.left - axis.labelWidth / 2; |
|
1452 axis.box.width = surface.width - plotOffset.left - plotOffset.right + axis.labelWidth; |
|
1453 } |
|
1454 else { |
|
1455 axis.box.top = plotOffset.top - axis.labelHeight / 2; |
|
1456 axis.box.height = surface.height - plotOffset.bottom - plotOffset.top + axis.labelHeight; |
|
1457 } |
|
1458 } |
|
1459 |
|
1460 function adjustLayoutForThingsStickingOut() { |
|
1461 // possibly adjust plot offset to ensure everything stays |
|
1462 // inside the canvas and isn't clipped off |
|
1463 |
|
1464 var minMargin = options.grid.minBorderMargin, |
|
1465 margins = { x: 0, y: 0 }, i, axis; |
|
1466 |
|
1467 // check stuff from the plot (FIXME: this should just read |
|
1468 // a value from the series, otherwise it's impossible to |
|
1469 // customize) |
|
1470 if (minMargin == null) { |
|
1471 minMargin = 0; |
|
1472 for (i = 0; i < series.length; ++i) |
|
1473 minMargin = Math.max(minMargin, 2 * (series[i].points.radius + series[i].points.lineWidth/2)); |
|
1474 } |
|
1475 |
|
1476 margins.x = margins.y = Math.ceil(minMargin); |
|
1477 |
|
1478 // check axis labels, note we don't check the actual |
|
1479 // labels but instead use the overall width/height to not |
|
1480 // jump as much around with replots |
|
1481 $.each(allAxes(), function (_, axis) { |
|
1482 var dir = axis.direction; |
|
1483 if (axis.reserveSpace) |
|
1484 margins[dir] = Math.ceil(Math.max(margins[dir], (dir == "x" ? axis.labelWidth : axis.labelHeight) / 2)); |
|
1485 }); |
|
1486 |
|
1487 plotOffset.left = Math.max(margins.x, plotOffset.left); |
|
1488 plotOffset.right = Math.max(margins.x, plotOffset.right); |
|
1489 plotOffset.top = Math.max(margins.y, plotOffset.top); |
|
1490 plotOffset.bottom = Math.max(margins.y, plotOffset.bottom); |
|
1491 } |
|
1492 |
|
1493 function setupGrid() { |
|
1494 var i, axes = allAxes(), showGrid = options.grid.show; |
|
1495 |
|
1496 // Initialize the plot's offset from the edge of the canvas |
|
1497 |
|
1498 for (var a in plotOffset) { |
|
1499 var margin = options.grid.margin || 0; |
|
1500 plotOffset[a] = typeof margin == "number" ? margin : margin[a] || 0; |
|
1501 } |
|
1502 |
|
1503 executeHooks(hooks.processOffset, [plotOffset]); |
|
1504 |
|
1505 // If the grid is visible, add its border width to the offset |
|
1506 |
|
1507 for (var a in plotOffset) { |
|
1508 if(typeof(options.grid.borderWidth) == "object") { |
|
1509 plotOffset[a] += showGrid ? options.grid.borderWidth[a] : 0; |
|
1510 } |
|
1511 else { |
|
1512 plotOffset[a] += showGrid ? options.grid.borderWidth : 0; |
|
1513 } |
|
1514 } |
|
1515 |
|
1516 // init axes |
|
1517 $.each(axes, function (_, axis) { |
|
1518 axis.show = axis.options.show; |
|
1519 if (axis.show == null) |
|
1520 axis.show = axis.used; // by default an axis is visible if it's got data |
|
1521 |
|
1522 axis.reserveSpace = axis.show || axis.options.reserveSpace; |
|
1523 |
|
1524 setRange(axis); |
|
1525 }); |
|
1526 |
|
1527 if (showGrid) { |
|
1528 |
|
1529 var allocatedAxes = $.grep(axes, function (axis) { return axis.reserveSpace; }); |
|
1530 |
|
1531 $.each(allocatedAxes, function (_, axis) { |
|
1532 // make the ticks |
|
1533 setupTickGeneration(axis); |
|
1534 setTicks(axis); |
|
1535 snapRangeToTicks(axis, axis.ticks); |
|
1536 // find labelWidth/Height for axis |
|
1537 measureTickLabels(axis); |
|
1538 }); |
|
1539 |
|
1540 // with all dimensions calculated, we can compute the |
|
1541 // axis bounding boxes, start from the outside |
|
1542 // (reverse order) |
|
1543 for (i = allocatedAxes.length - 1; i >= 0; --i) |
|
1544 allocateAxisBoxFirstPhase(allocatedAxes[i]); |
|
1545 |
|
1546 // make sure we've got enough space for things that |
|
1547 // might stick out |
|
1548 adjustLayoutForThingsStickingOut(); |
|
1549 |
|
1550 $.each(allocatedAxes, function (_, axis) { |
|
1551 allocateAxisBoxSecondPhase(axis); |
|
1552 }); |
|
1553 } |
|
1554 |
|
1555 plotWidth = surface.width - plotOffset.left - plotOffset.right; |
|
1556 plotHeight = surface.height - plotOffset.bottom - plotOffset.top; |
|
1557 |
|
1558 // now we got the proper plot dimensions, we can compute the scaling |
|
1559 $.each(axes, function (_, axis) { |
|
1560 setTransformationHelpers(axis); |
|
1561 }); |
|
1562 |
|
1563 if (showGrid) { |
|
1564 drawAxisLabels(); |
|
1565 } |
|
1566 |
|
1567 insertLegend(); |
|
1568 } |
|
1569 |
|
1570 function setRange(axis) { |
|
1571 var opts = axis.options, |
|
1572 min = +(opts.min != null ? opts.min : axis.datamin), |
|
1573 max = +(opts.max != null ? opts.max : axis.datamax), |
|
1574 delta = max - min; |
|
1575 |
|
1576 if (delta == 0.0) { |
|
1577 // degenerate case |
|
1578 var widen = max == 0 ? 1 : 0.01; |
|
1579 |
|
1580 if (opts.min == null) |
|
1581 min -= widen; |
|
1582 // always widen max if we couldn't widen min to ensure we |
|
1583 // don't fall into min == max which doesn't work |
|
1584 if (opts.max == null || opts.min != null) |
|
1585 max += widen; |
|
1586 } |
|
1587 else { |
|
1588 // consider autoscaling |
|
1589 var margin = opts.autoscaleMargin; |
|
1590 if (margin != null) { |
|
1591 if (opts.min == null) { |
|
1592 min -= delta * margin; |
|
1593 // make sure we don't go below zero if all values |
|
1594 // are positive |
|
1595 if (min < 0 && axis.datamin != null && axis.datamin >= 0) |
|
1596 min = 0; |
|
1597 } |
|
1598 if (opts.max == null) { |
|
1599 max += delta * margin; |
|
1600 if (max > 0 && axis.datamax != null && axis.datamax <= 0) |
|
1601 max = 0; |
|
1602 } |
|
1603 } |
|
1604 } |
|
1605 axis.min = min; |
|
1606 axis.max = max; |
|
1607 } |
|
1608 |
|
1609 function setupTickGeneration(axis) { |
|
1610 var opts = axis.options; |
|
1611 |
|
1612 // estimate number of ticks |
|
1613 var noTicks; |
|
1614 if (typeof opts.ticks == "number" && opts.ticks > 0) |
|
1615 noTicks = opts.ticks; |
|
1616 else |
|
1617 // heuristic based on the model a*sqrt(x) fitted to |
|
1618 // some data points that seemed reasonable |
|
1619 noTicks = 0.3 * Math.sqrt(axis.direction == "x" ? surface.width : surface.height); |
|
1620 |
|
1621 var delta = (axis.max - axis.min) / noTicks, |
|
1622 dec = -Math.floor(Math.log(delta) / Math.LN10), |
|
1623 maxDec = opts.tickDecimals; |
|
1624 |
|
1625 if (maxDec != null && dec > maxDec) { |
|
1626 dec = maxDec; |
|
1627 } |
|
1628 |
|
1629 var magn = Math.pow(10, -dec), |
|
1630 norm = delta / magn, // norm is between 1.0 and 10.0 |
|
1631 size; |
|
1632 |
|
1633 if (norm < 1.5) { |
|
1634 size = 1; |
|
1635 } else if (norm < 3) { |
|
1636 size = 2; |
|
1637 // special case for 2.5, requires an extra decimal |
|
1638 if (norm > 2.25 && (maxDec == null || dec + 1 <= maxDec)) { |
|
1639 size = 2.5; |
|
1640 ++dec; |
|
1641 } |
|
1642 } else if (norm < 7.5) { |
|
1643 size = 5; |
|
1644 } else { |
|
1645 size = 10; |
|
1646 } |
|
1647 |
|
1648 size *= magn; |
|
1649 |
|
1650 if (opts.minTickSize != null && size < opts.minTickSize) { |
|
1651 size = opts.minTickSize; |
|
1652 } |
|
1653 |
|
1654 axis.delta = delta; |
|
1655 axis.tickDecimals = Math.max(0, maxDec != null ? maxDec : dec); |
|
1656 axis.tickSize = opts.tickSize || size; |
|
1657 |
|
1658 // Time mode was moved to a plug-in in 0.8, but since so many people use this |
|
1659 // we'll add an especially friendly make sure they remembered to include it. |
|
1660 |
|
1661 if (opts.mode == "time" && !axis.tickGenerator) { |
|
1662 throw new Error("Time mode requires the flot.time plugin."); |
|
1663 } |
|
1664 |
|
1665 // Flot supports base-10 axes; any other mode else is handled by a plug-in, |
|
1666 // like flot.time.js. |
|
1667 |
|
1668 if (!axis.tickGenerator) { |
|
1669 |
|
1670 axis.tickGenerator = function (axis) { |
|
1671 |
|
1672 var ticks = [], |
|
1673 start = floorInBase(axis.min, axis.tickSize), |
|
1674 i = 0, |
|
1675 v = Number.NaN, |
|
1676 prev; |
|
1677 |
|
1678 do { |
|
1679 prev = v; |
|
1680 v = start + i * axis.tickSize; |
|
1681 ticks.push(v); |
|
1682 ++i; |
|
1683 } while (v < axis.max && v != prev); |
|
1684 return ticks; |
|
1685 }; |
|
1686 |
|
1687 axis.tickFormatter = function (value, axis) { |
|
1688 |
|
1689 var factor = axis.tickDecimals ? Math.pow(10, axis.tickDecimals) : 1; |
|
1690 var formatted = "" + Math.round(value * factor) / factor; |
|
1691 |
|
1692 // If tickDecimals was specified, ensure that we have exactly that |
|
1693 // much precision; otherwise default to the value's own precision. |
|
1694 |
|
1695 if (axis.tickDecimals != null) { |
|
1696 var decimal = formatted.indexOf("."); |
|
1697 var precision = decimal == -1 ? 0 : formatted.length - decimal - 1; |
|
1698 if (precision < axis.tickDecimals) { |
|
1699 return (precision ? formatted : formatted + ".") + ("" + factor).substr(1, axis.tickDecimals - precision); |
|
1700 } |
|
1701 } |
|
1702 |
|
1703 return formatted; |
|
1704 }; |
|
1705 } |
|
1706 |
|
1707 if ($.isFunction(opts.tickFormatter)) |
|
1708 axis.tickFormatter = function (v, axis) { return "" + opts.tickFormatter(v, axis); }; |
|
1709 |
|
1710 if (opts.alignTicksWithAxis != null) { |
|
1711 var otherAxis = (axis.direction == "x" ? xaxes : yaxes)[opts.alignTicksWithAxis - 1]; |
|
1712 if (otherAxis && otherAxis.used && otherAxis != axis) { |
|
1713 // consider snapping min/max to outermost nice ticks |
|
1714 var niceTicks = axis.tickGenerator(axis); |
|
1715 if (niceTicks.length > 0) { |
|
1716 if (opts.min == null) |
|
1717 axis.min = Math.min(axis.min, niceTicks[0]); |
|
1718 if (opts.max == null && niceTicks.length > 1) |
|
1719 axis.max = Math.max(axis.max, niceTicks[niceTicks.length - 1]); |
|
1720 } |
|
1721 |
|
1722 axis.tickGenerator = function (axis) { |
|
1723 // copy ticks, scaled to this axis |
|
1724 var ticks = [], v, i; |
|
1725 for (i = 0; i < otherAxis.ticks.length; ++i) { |
|
1726 v = (otherAxis.ticks[i].v - otherAxis.min) / (otherAxis.max - otherAxis.min); |
|
1727 v = axis.min + v * (axis.max - axis.min); |
|
1728 ticks.push(v); |
|
1729 } |
|
1730 return ticks; |
|
1731 }; |
|
1732 |
|
1733 // we might need an extra decimal since forced |
|
1734 // ticks don't necessarily fit naturally |
|
1735 if (!axis.mode && opts.tickDecimals == null) { |
|
1736 var extraDec = Math.max(0, -Math.floor(Math.log(axis.delta) / Math.LN10) + 1), |
|
1737 ts = axis.tickGenerator(axis); |
|
1738 |
|
1739 // only proceed if the tick interval rounded |
|
1740 // with an extra decimal doesn't give us a |
|
1741 // zero at end |
|
1742 if (!(ts.length > 1 && /\..*0$/.test((ts[1] - ts[0]).toFixed(extraDec)))) |
|
1743 axis.tickDecimals = extraDec; |
|
1744 } |
|
1745 } |
|
1746 } |
|
1747 } |
|
1748 |
|
1749 function setTicks(axis) { |
|
1750 var oticks = axis.options.ticks, ticks = []; |
|
1751 if (oticks == null || (typeof oticks == "number" && oticks > 0)) |
|
1752 ticks = axis.tickGenerator(axis); |
|
1753 else if (oticks) { |
|
1754 if ($.isFunction(oticks)) |
|
1755 // generate the ticks |
|
1756 ticks = oticks(axis); |
|
1757 else |
|
1758 ticks = oticks; |
|
1759 } |
|
1760 |
|
1761 // clean up/labelify the supplied ticks, copy them over |
|
1762 var i, v; |
|
1763 axis.ticks = []; |
|
1764 for (i = 0; i < ticks.length; ++i) { |
|
1765 var label = null; |
|
1766 var t = ticks[i]; |
|
1767 if (typeof t == "object") { |
|
1768 v = +t[0]; |
|
1769 if (t.length > 1) |
|
1770 label = t[1]; |
|
1771 } |
|
1772 else |
|
1773 v = +t; |
|
1774 if (label == null) |
|
1775 label = axis.tickFormatter(v, axis); |
|
1776 if (!isNaN(v)) |
|
1777 axis.ticks.push({ v: v, label: label }); |
|
1778 } |
|
1779 } |
|
1780 |
|
1781 function snapRangeToTicks(axis, ticks) { |
|
1782 if (axis.options.autoscaleMargin && ticks.length > 0) { |
|
1783 // snap to ticks |
|
1784 if (axis.options.min == null) |
|
1785 axis.min = Math.min(axis.min, ticks[0].v); |
|
1786 if (axis.options.max == null && ticks.length > 1) |
|
1787 axis.max = Math.max(axis.max, ticks[ticks.length - 1].v); |
|
1788 } |
|
1789 } |
|
1790 |
|
1791 function draw() { |
|
1792 |
|
1793 surface.clear(); |
|
1794 |
|
1795 executeHooks(hooks.drawBackground, [ctx]); |
|
1796 |
|
1797 var grid = options.grid; |
|
1798 |
|
1799 // draw background, if any |
|
1800 if (grid.show && grid.backgroundColor) |
|
1801 drawBackground(); |
|
1802 |
|
1803 if (grid.show && !grid.aboveData) { |
|
1804 drawGrid(); |
|
1805 } |
|
1806 |
|
1807 for (var i = 0; i < series.length; ++i) { |
|
1808 executeHooks(hooks.drawSeries, [ctx, series[i]]); |
|
1809 drawSeries(series[i]); |
|
1810 } |
|
1811 |
|
1812 executeHooks(hooks.draw, [ctx]); |
|
1813 |
|
1814 if (grid.show && grid.aboveData) { |
|
1815 drawGrid(); |
|
1816 } |
|
1817 |
|
1818 surface.render(); |
|
1819 |
|
1820 // A draw implies that either the axes or data have changed, so we |
|
1821 // should probably update the overlay highlights as well. |
|
1822 |
|
1823 triggerRedrawOverlay(); |
|
1824 } |
|
1825 |
|
1826 function extractRange(ranges, coord) { |
|
1827 var axis, from, to, key, axes = allAxes(); |
|
1828 |
|
1829 for (var i = 0; i < axes.length; ++i) { |
|
1830 axis = axes[i]; |
|
1831 if (axis.direction == coord) { |
|
1832 key = coord + axis.n + "axis"; |
|
1833 if (!ranges[key] && axis.n == 1) |
|
1834 key = coord + "axis"; // support x1axis as xaxis |
|
1835 if (ranges[key]) { |
|
1836 from = ranges[key].from; |
|
1837 to = ranges[key].to; |
|
1838 break; |
|
1839 } |
|
1840 } |
|
1841 } |
|
1842 |
|
1843 // backwards-compat stuff - to be removed in future |
|
1844 if (!ranges[key]) { |
|
1845 axis = coord == "x" ? xaxes[0] : yaxes[0]; |
|
1846 from = ranges[coord + "1"]; |
|
1847 to = ranges[coord + "2"]; |
|
1848 } |
|
1849 |
|
1850 // auto-reverse as an added bonus |
|
1851 if (from != null && to != null && from > to) { |
|
1852 var tmp = from; |
|
1853 from = to; |
|
1854 to = tmp; |
|
1855 } |
|
1856 |
|
1857 return { from: from, to: to, axis: axis }; |
|
1858 } |
|
1859 |
|
1860 function drawBackground() { |
|
1861 ctx.save(); |
|
1862 ctx.translate(plotOffset.left, plotOffset.top); |
|
1863 |
|
1864 ctx.fillStyle = getColorOrGradient(options.grid.backgroundColor, plotHeight, 0, "rgba(255, 255, 255, 0)"); |
|
1865 ctx.fillRect(0, 0, plotWidth, plotHeight); |
|
1866 ctx.restore(); |
|
1867 } |
|
1868 |
|
1869 function drawGrid() { |
|
1870 var i, axes, bw, bc; |
|
1871 |
|
1872 ctx.save(); |
|
1873 ctx.translate(plotOffset.left, plotOffset.top); |
|
1874 |
|
1875 // draw markings |
|
1876 var markings = options.grid.markings; |
|
1877 if (markings) { |
|
1878 if ($.isFunction(markings)) { |
|
1879 axes = plot.getAxes(); |
|
1880 // xmin etc. is backwards compatibility, to be |
|
1881 // removed in the future |
|
1882 axes.xmin = axes.xaxis.min; |
|
1883 axes.xmax = axes.xaxis.max; |
|
1884 axes.ymin = axes.yaxis.min; |
|
1885 axes.ymax = axes.yaxis.max; |
|
1886 |
|
1887 markings = markings(axes); |
|
1888 } |
|
1889 |
|
1890 for (i = 0; i < markings.length; ++i) { |
|
1891 var m = markings[i], |
|
1892 xrange = extractRange(m, "x"), |
|
1893 yrange = extractRange(m, "y"); |
|
1894 |
|
1895 // fill in missing |
|
1896 if (xrange.from == null) |
|
1897 xrange.from = xrange.axis.min; |
|
1898 if (xrange.to == null) |
|
1899 xrange.to = xrange.axis.max; |
|
1900 if (yrange.from == null) |
|
1901 yrange.from = yrange.axis.min; |
|
1902 if (yrange.to == null) |
|
1903 yrange.to = yrange.axis.max; |
|
1904 |
|
1905 // clip |
|
1906 if (xrange.to < xrange.axis.min || xrange.from > xrange.axis.max || |
|
1907 yrange.to < yrange.axis.min || yrange.from > yrange.axis.max) |
|
1908 continue; |
|
1909 |
|
1910 xrange.from = Math.max(xrange.from, xrange.axis.min); |
|
1911 xrange.to = Math.min(xrange.to, xrange.axis.max); |
|
1912 yrange.from = Math.max(yrange.from, yrange.axis.min); |
|
1913 yrange.to = Math.min(yrange.to, yrange.axis.max); |
|
1914 |
|
1915 if (xrange.from == xrange.to && yrange.from == yrange.to) |
|
1916 continue; |
|
1917 |
|
1918 // then draw |
|
1919 xrange.from = xrange.axis.p2c(xrange.from); |
|
1920 xrange.to = xrange.axis.p2c(xrange.to); |
|
1921 yrange.from = yrange.axis.p2c(yrange.from); |
|
1922 yrange.to = yrange.axis.p2c(yrange.to); |
|
1923 |
|
1924 if (xrange.from == xrange.to || yrange.from == yrange.to) { |
|
1925 // draw line |
|
1926 ctx.beginPath(); |
|
1927 ctx.strokeStyle = m.color || options.grid.markingsColor; |
|
1928 ctx.lineWidth = m.lineWidth || options.grid.markingsLineWidth; |
|
1929 ctx.moveTo(xrange.from, yrange.from); |
|
1930 ctx.lineTo(xrange.to, yrange.to); |
|
1931 ctx.stroke(); |
|
1932 } |
|
1933 else { |
|
1934 // fill area |
|
1935 ctx.fillStyle = m.color || options.grid.markingsColor; |
|
1936 ctx.fillRect(xrange.from, yrange.to, |
|
1937 xrange.to - xrange.from, |
|
1938 yrange.from - yrange.to); |
|
1939 } |
|
1940 } |
|
1941 } |
|
1942 |
|
1943 // draw the ticks |
|
1944 axes = allAxes(); |
|
1945 bw = options.grid.borderWidth; |
|
1946 |
|
1947 for (var j = 0; j < axes.length; ++j) { |
|
1948 var axis = axes[j], box = axis.box, |
|
1949 t = axis.tickLength, x, y, xoff, yoff; |
|
1950 if (!axis.show || axis.ticks.length == 0) |
|
1951 continue; |
|
1952 |
|
1953 ctx.lineWidth = 1; |
|
1954 |
|
1955 // find the edges |
|
1956 if (axis.direction == "x") { |
|
1957 x = 0; |
|
1958 if (t == "full") |
|
1959 y = (axis.position == "top" ? 0 : plotHeight); |
|
1960 else |
|
1961 y = box.top - plotOffset.top + (axis.position == "top" ? box.height : 0); |
|
1962 } |
|
1963 else { |
|
1964 y = 0; |
|
1965 if (t == "full") |
|
1966 x = (axis.position == "left" ? 0 : plotWidth); |
|
1967 else |
|
1968 x = box.left - plotOffset.left + (axis.position == "left" ? box.width : 0); |
|
1969 } |
|
1970 |
|
1971 // draw tick bar |
|
1972 if (!axis.innermost) { |
|
1973 ctx.strokeStyle = axis.options.color; |
|
1974 ctx.beginPath(); |
|
1975 xoff = yoff = 0; |
|
1976 if (axis.direction == "x") |
|
1977 xoff = plotWidth + 1; |
|
1978 else |
|
1979 yoff = plotHeight + 1; |
|
1980 |
|
1981 if (ctx.lineWidth == 1) { |
|
1982 if (axis.direction == "x") { |
|
1983 y = Math.floor(y) + 0.5; |
|
1984 } else { |
|
1985 x = Math.floor(x) + 0.5; |
|
1986 } |
|
1987 } |
|
1988 |
|
1989 ctx.moveTo(x, y); |
|
1990 ctx.lineTo(x + xoff, y + yoff); |
|
1991 ctx.stroke(); |
|
1992 } |
|
1993 |
|
1994 // draw ticks |
|
1995 |
|
1996 ctx.strokeStyle = axis.options.tickColor; |
|
1997 |
|
1998 ctx.beginPath(); |
|
1999 for (i = 0; i < axis.ticks.length; ++i) { |
|
2000 var v = axis.ticks[i].v; |
|
2001 |
|
2002 xoff = yoff = 0; |
|
2003 |
|
2004 if (isNaN(v) || v < axis.min || v > axis.max |
|
2005 // skip those lying on the axes if we got a border |
|
2006 || (t == "full" |
|
2007 && ((typeof bw == "object" && bw[axis.position] > 0) || bw > 0) |
|
2008 && (v == axis.min || v == axis.max))) |
|
2009 continue; |
|
2010 |
|
2011 if (axis.direction == "x") { |
|
2012 x = axis.p2c(v); |
|
2013 yoff = t == "full" ? -plotHeight : t; |
|
2014 |
|
2015 if (axis.position == "top") |
|
2016 yoff = -yoff; |
|
2017 } |
|
2018 else { |
|
2019 y = axis.p2c(v); |
|
2020 xoff = t == "full" ? -plotWidth : t; |
|
2021 |
|
2022 if (axis.position == "left") |
|
2023 xoff = -xoff; |
|
2024 } |
|
2025 |
|
2026 if (ctx.lineWidth == 1) { |
|
2027 if (axis.direction == "x") |
|
2028 x = Math.floor(x) + 0.5; |
|
2029 else |
|
2030 y = Math.floor(y) + 0.5; |
|
2031 } |
|
2032 |
|
2033 ctx.moveTo(x, y); |
|
2034 ctx.lineTo(x + xoff, y + yoff); |
|
2035 } |
|
2036 |
|
2037 ctx.stroke(); |
|
2038 } |
|
2039 |
|
2040 |
|
2041 // draw border |
|
2042 if (bw) { |
|
2043 // If either borderWidth or borderColor is an object, then draw the border |
|
2044 // line by line instead of as one rectangle |
|
2045 bc = options.grid.borderColor; |
|
2046 if(typeof bw == "object" || typeof bc == "object") { |
|
2047 if (typeof bw !== "object") { |
|
2048 bw = {top: bw, right: bw, bottom: bw, left: bw}; |
|
2049 } |
|
2050 if (typeof bc !== "object") { |
|
2051 bc = {top: bc, right: bc, bottom: bc, left: bc}; |
|
2052 } |
|
2053 |
|
2054 if (bw.top > 0) { |
|
2055 ctx.strokeStyle = bc.top; |
|
2056 ctx.lineWidth = bw.top; |
|
2057 ctx.beginPath(); |
|
2058 ctx.moveTo(0 - bw.left, 0 - bw.top/2); |
|
2059 ctx.lineTo(plotWidth, 0 - bw.top/2); |
|
2060 ctx.stroke(); |
|
2061 } |
|
2062 |
|
2063 if (bw.right > 0) { |
|
2064 ctx.strokeStyle = bc.right; |
|
2065 ctx.lineWidth = bw.right; |
|
2066 ctx.beginPath(); |
|
2067 ctx.moveTo(plotWidth + bw.right / 2, 0 - bw.top); |
|
2068 ctx.lineTo(plotWidth + bw.right / 2, plotHeight); |
|
2069 ctx.stroke(); |
|
2070 } |
|
2071 |
|
2072 if (bw.bottom > 0) { |
|
2073 ctx.strokeStyle = bc.bottom; |
|
2074 ctx.lineWidth = bw.bottom; |
|
2075 ctx.beginPath(); |
|
2076 ctx.moveTo(plotWidth + bw.right, plotHeight + bw.bottom / 2); |
|
2077 ctx.lineTo(0, plotHeight + bw.bottom / 2); |
|
2078 ctx.stroke(); |
|
2079 } |
|
2080 |
|
2081 if (bw.left > 0) { |
|
2082 ctx.strokeStyle = bc.left; |
|
2083 ctx.lineWidth = bw.left; |
|
2084 ctx.beginPath(); |
|
2085 ctx.moveTo(0 - bw.left/2, plotHeight + bw.bottom); |
|
2086 ctx.lineTo(0- bw.left/2, 0); |
|
2087 ctx.stroke(); |
|
2088 } |
|
2089 } |
|
2090 else { |
|
2091 ctx.lineWidth = bw; |
|
2092 ctx.strokeStyle = options.grid.borderColor; |
|
2093 ctx.strokeRect(-bw/2, -bw/2, plotWidth + bw, plotHeight + bw); |
|
2094 } |
|
2095 } |
|
2096 |
|
2097 ctx.restore(); |
|
2098 } |
|
2099 |
|
2100 function drawAxisLabels() { |
|
2101 |
|
2102 $.each(allAxes(), function (_, axis) { |
|
2103 if (!axis.show || axis.ticks.length == 0) |
|
2104 return; |
|
2105 |
|
2106 var box = axis.box, |
|
2107 legacyStyles = axis.direction + "Axis " + axis.direction + axis.n + "Axis", |
|
2108 layer = "flot-" + axis.direction + "-axis flot-" + axis.direction + axis.n + "-axis " + legacyStyles, |
|
2109 font = axis.options.font || "flot-tick-label tickLabel", |
|
2110 tick, x, y, halign, valign; |
|
2111 |
|
2112 surface.removeText(layer); |
|
2113 |
|
2114 for (var i = 0; i < axis.ticks.length; ++i) { |
|
2115 |
|
2116 tick = axis.ticks[i]; |
|
2117 if (!tick.label || tick.v < axis.min || tick.v > axis.max) |
|
2118 continue; |
|
2119 |
|
2120 if (axis.direction == "x") { |
|
2121 halign = "center"; |
|
2122 x = plotOffset.left + axis.p2c(tick.v); |
|
2123 if (axis.position == "bottom") { |
|
2124 y = box.top + box.padding; |
|
2125 } else { |
|
2126 y = box.top + box.height - box.padding; |
|
2127 valign = "bottom"; |
|
2128 } |
|
2129 } else { |
|
2130 valign = "middle"; |
|
2131 y = plotOffset.top + axis.p2c(tick.v); |
|
2132 if (axis.position == "left") { |
|
2133 x = box.left + box.width - box.padding; |
|
2134 halign = "right"; |
|
2135 } else { |
|
2136 x = box.left + box.padding; |
|
2137 } |
|
2138 } |
|
2139 |
|
2140 surface.addText(layer, x, y, tick.label, font, null, null, halign, valign); |
|
2141 } |
|
2142 }); |
|
2143 } |
|
2144 |
|
2145 function drawSeries(series) { |
|
2146 if (series.lines.show) |
|
2147 drawSeriesLines(series); |
|
2148 if (series.bars.show) |
|
2149 drawSeriesBars(series); |
|
2150 if (series.points.show) |
|
2151 drawSeriesPoints(series); |
|
2152 } |
|
2153 |
|
2154 function drawSeriesLines(series) { |
|
2155 function plotLine(datapoints, xoffset, yoffset, axisx, axisy) { |
|
2156 var points = datapoints.points, |
|
2157 ps = datapoints.pointsize, |
|
2158 prevx = null, prevy = null; |
|
2159 |
|
2160 ctx.beginPath(); |
|
2161 for (var i = ps; i < points.length; i += ps) { |
|
2162 var x1 = points[i - ps], y1 = points[i - ps + 1], |
|
2163 x2 = points[i], y2 = points[i + 1]; |
|
2164 |
|
2165 if (x1 == null || x2 == null) |
|
2166 continue; |
|
2167 |
|
2168 // clip with ymin |
|
2169 if (y1 <= y2 && y1 < axisy.min) { |
|
2170 if (y2 < axisy.min) |
|
2171 continue; // line segment is outside |
|
2172 // compute new intersection point |
|
2173 x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
2174 y1 = axisy.min; |
|
2175 } |
|
2176 else if (y2 <= y1 && y2 < axisy.min) { |
|
2177 if (y1 < axisy.min) |
|
2178 continue; |
|
2179 x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
2180 y2 = axisy.min; |
|
2181 } |
|
2182 |
|
2183 // clip with ymax |
|
2184 if (y1 >= y2 && y1 > axisy.max) { |
|
2185 if (y2 > axisy.max) |
|
2186 continue; |
|
2187 x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
2188 y1 = axisy.max; |
|
2189 } |
|
2190 else if (y2 >= y1 && y2 > axisy.max) { |
|
2191 if (y1 > axisy.max) |
|
2192 continue; |
|
2193 x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
2194 y2 = axisy.max; |
|
2195 } |
|
2196 |
|
2197 // clip with xmin |
|
2198 if (x1 <= x2 && x1 < axisx.min) { |
|
2199 if (x2 < axisx.min) |
|
2200 continue; |
|
2201 y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
2202 x1 = axisx.min; |
|
2203 } |
|
2204 else if (x2 <= x1 && x2 < axisx.min) { |
|
2205 if (x1 < axisx.min) |
|
2206 continue; |
|
2207 y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
2208 x2 = axisx.min; |
|
2209 } |
|
2210 |
|
2211 // clip with xmax |
|
2212 if (x1 >= x2 && x1 > axisx.max) { |
|
2213 if (x2 > axisx.max) |
|
2214 continue; |
|
2215 y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
2216 x1 = axisx.max; |
|
2217 } |
|
2218 else if (x2 >= x1 && x2 > axisx.max) { |
|
2219 if (x1 > axisx.max) |
|
2220 continue; |
|
2221 y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
2222 x2 = axisx.max; |
|
2223 } |
|
2224 |
|
2225 if (x1 != prevx || y1 != prevy) |
|
2226 ctx.moveTo(axisx.p2c(x1) + xoffset, axisy.p2c(y1) + yoffset); |
|
2227 |
|
2228 prevx = x2; |
|
2229 prevy = y2; |
|
2230 ctx.lineTo(axisx.p2c(x2) + xoffset, axisy.p2c(y2) + yoffset); |
|
2231 } |
|
2232 ctx.stroke(); |
|
2233 } |
|
2234 |
|
2235 function plotLineArea(datapoints, axisx, axisy) { |
|
2236 var points = datapoints.points, |
|
2237 ps = datapoints.pointsize, |
|
2238 bottom = Math.min(Math.max(0, axisy.min), axisy.max), |
|
2239 i = 0, top, areaOpen = false, |
|
2240 ypos = 1, segmentStart = 0, segmentEnd = 0; |
|
2241 |
|
2242 // we process each segment in two turns, first forward |
|
2243 // direction to sketch out top, then once we hit the |
|
2244 // end we go backwards to sketch the bottom |
|
2245 while (true) { |
|
2246 if (ps > 0 && i > points.length + ps) |
|
2247 break; |
|
2248 |
|
2249 i += ps; // ps is negative if going backwards |
|
2250 |
|
2251 var x1 = points[i - ps], |
|
2252 y1 = points[i - ps + ypos], |
|
2253 x2 = points[i], y2 = points[i + ypos]; |
|
2254 |
|
2255 if (areaOpen) { |
|
2256 if (ps > 0 && x1 != null && x2 == null) { |
|
2257 // at turning point |
|
2258 segmentEnd = i; |
|
2259 ps = -ps; |
|
2260 ypos = 2; |
|
2261 continue; |
|
2262 } |
|
2263 |
|
2264 if (ps < 0 && i == segmentStart + ps) { |
|
2265 // done with the reverse sweep |
|
2266 ctx.fill(); |
|
2267 areaOpen = false; |
|
2268 ps = -ps; |
|
2269 ypos = 1; |
|
2270 i = segmentStart = segmentEnd + ps; |
|
2271 continue; |
|
2272 } |
|
2273 } |
|
2274 |
|
2275 if (x1 == null || x2 == null) |
|
2276 continue; |
|
2277 |
|
2278 // clip x values |
|
2279 |
|
2280 // clip with xmin |
|
2281 if (x1 <= x2 && x1 < axisx.min) { |
|
2282 if (x2 < axisx.min) |
|
2283 continue; |
|
2284 y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
2285 x1 = axisx.min; |
|
2286 } |
|
2287 else if (x2 <= x1 && x2 < axisx.min) { |
|
2288 if (x1 < axisx.min) |
|
2289 continue; |
|
2290 y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
2291 x2 = axisx.min; |
|
2292 } |
|
2293 |
|
2294 // clip with xmax |
|
2295 if (x1 >= x2 && x1 > axisx.max) { |
|
2296 if (x2 > axisx.max) |
|
2297 continue; |
|
2298 y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
2299 x1 = axisx.max; |
|
2300 } |
|
2301 else if (x2 >= x1 && x2 > axisx.max) { |
|
2302 if (x1 > axisx.max) |
|
2303 continue; |
|
2304 y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
2305 x2 = axisx.max; |
|
2306 } |
|
2307 |
|
2308 if (!areaOpen) { |
|
2309 // open area |
|
2310 ctx.beginPath(); |
|
2311 ctx.moveTo(axisx.p2c(x1), axisy.p2c(bottom)); |
|
2312 areaOpen = true; |
|
2313 } |
|
2314 |
|
2315 // now first check the case where both is outside |
|
2316 if (y1 >= axisy.max && y2 >= axisy.max) { |
|
2317 ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.max)); |
|
2318 ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.max)); |
|
2319 continue; |
|
2320 } |
|
2321 else if (y1 <= axisy.min && y2 <= axisy.min) { |
|
2322 ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.min)); |
|
2323 ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.min)); |
|
2324 continue; |
|
2325 } |
|
2326 |
|
2327 // else it's a bit more complicated, there might |
|
2328 // be a flat maxed out rectangle first, then a |
|
2329 // triangular cutout or reverse; to find these |
|
2330 // keep track of the current x values |
|
2331 var x1old = x1, x2old = x2; |
|
2332 |
|
2333 // clip the y values, without shortcutting, we |
|
2334 // go through all cases in turn |
|
2335 |
|
2336 // clip with ymin |
|
2337 if (y1 <= y2 && y1 < axisy.min && y2 >= axisy.min) { |
|
2338 x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
2339 y1 = axisy.min; |
|
2340 } |
|
2341 else if (y2 <= y1 && y2 < axisy.min && y1 >= axisy.min) { |
|
2342 x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
2343 y2 = axisy.min; |
|
2344 } |
|
2345 |
|
2346 // clip with ymax |
|
2347 if (y1 >= y2 && y1 > axisy.max && y2 <= axisy.max) { |
|
2348 x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
2349 y1 = axisy.max; |
|
2350 } |
|
2351 else if (y2 >= y1 && y2 > axisy.max && y1 <= axisy.max) { |
|
2352 x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
2353 y2 = axisy.max; |
|
2354 } |
|
2355 |
|
2356 // if the x value was changed we got a rectangle |
|
2357 // to fill |
|
2358 if (x1 != x1old) { |
|
2359 ctx.lineTo(axisx.p2c(x1old), axisy.p2c(y1)); |
|
2360 // it goes to (x1, y1), but we fill that below |
|
2361 } |
|
2362 |
|
2363 // fill triangular section, this sometimes result |
|
2364 // in redundant points if (x1, y1) hasn't changed |
|
2365 // from previous line to, but we just ignore that |
|
2366 ctx.lineTo(axisx.p2c(x1), axisy.p2c(y1)); |
|
2367 ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2)); |
|
2368 |
|
2369 // fill the other rectangle if it's there |
|
2370 if (x2 != x2old) { |
|
2371 ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2)); |
|
2372 ctx.lineTo(axisx.p2c(x2old), axisy.p2c(y2)); |
|
2373 } |
|
2374 } |
|
2375 } |
|
2376 |
|
2377 ctx.save(); |
|
2378 ctx.translate(plotOffset.left, plotOffset.top); |
|
2379 ctx.lineJoin = "round"; |
|
2380 |
|
2381 var lw = series.lines.lineWidth, |
|
2382 sw = series.shadowSize; |
|
2383 // FIXME: consider another form of shadow when filling is turned on |
|
2384 if (lw > 0 && sw > 0) { |
|
2385 // draw shadow as a thick and thin line with transparency |
|
2386 ctx.lineWidth = sw; |
|
2387 ctx.strokeStyle = "rgba(0,0,0,0.1)"; |
|
2388 // position shadow at angle from the mid of line |
|
2389 var angle = Math.PI/18; |
|
2390 plotLine(series.datapoints, Math.sin(angle) * (lw/2 + sw/2), Math.cos(angle) * (lw/2 + sw/2), series.xaxis, series.yaxis); |
|
2391 ctx.lineWidth = sw/2; |
|
2392 plotLine(series.datapoints, Math.sin(angle) * (lw/2 + sw/4), Math.cos(angle) * (lw/2 + sw/4), series.xaxis, series.yaxis); |
|
2393 } |
|
2394 |
|
2395 ctx.lineWidth = lw; |
|
2396 ctx.strokeStyle = series.color; |
|
2397 var fillStyle = getFillStyle(series.lines, series.color, 0, plotHeight); |
|
2398 if (fillStyle) { |
|
2399 ctx.fillStyle = fillStyle; |
|
2400 plotLineArea(series.datapoints, series.xaxis, series.yaxis); |
|
2401 } |
|
2402 |
|
2403 if (lw > 0) |
|
2404 plotLine(series.datapoints, 0, 0, series.xaxis, series.yaxis); |
|
2405 ctx.restore(); |
|
2406 } |
|
2407 |
|
2408 function drawSeriesPoints(series) { |
|
2409 function plotPoints(datapoints, radius, fillStyle, offset, shadow, axisx, axisy, symbol) { |
|
2410 var points = datapoints.points, ps = datapoints.pointsize; |
|
2411 |
|
2412 for (var i = 0; i < points.length; i += ps) { |
|
2413 var x = points[i], y = points[i + 1]; |
|
2414 if (x == null || x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max) |
|
2415 continue; |
|
2416 |
|
2417 ctx.beginPath(); |
|
2418 x = axisx.p2c(x); |
|
2419 y = axisy.p2c(y) + offset; |
|
2420 if (symbol == "circle") |
|
2421 ctx.arc(x, y, radius, 0, shadow ? Math.PI : Math.PI * 2, false); |
|
2422 else |
|
2423 symbol(ctx, x, y, radius, shadow); |
|
2424 ctx.closePath(); |
|
2425 |
|
2426 if (fillStyle) { |
|
2427 ctx.fillStyle = fillStyle; |
|
2428 ctx.fill(); |
|
2429 } |
|
2430 ctx.stroke(); |
|
2431 } |
|
2432 } |
|
2433 |
|
2434 ctx.save(); |
|
2435 ctx.translate(plotOffset.left, plotOffset.top); |
|
2436 |
|
2437 var lw = series.points.lineWidth, |
|
2438 sw = series.shadowSize, |
|
2439 radius = series.points.radius, |
|
2440 symbol = series.points.symbol; |
|
2441 |
|
2442 // If the user sets the line width to 0, we change it to a very |
|
2443 // small value. A line width of 0 seems to force the default of 1. |
|
2444 // Doing the conditional here allows the shadow setting to still be |
|
2445 // optional even with a lineWidth of 0. |
|
2446 |
|
2447 if( lw == 0 ) |
|
2448 lw = 0.0001; |
|
2449 |
|
2450 if (lw > 0 && sw > 0) { |
|
2451 // draw shadow in two steps |
|
2452 var w = sw / 2; |
|
2453 ctx.lineWidth = w; |
|
2454 ctx.strokeStyle = "rgba(0,0,0,0.1)"; |
|
2455 plotPoints(series.datapoints, radius, null, w + w/2, true, |
|
2456 series.xaxis, series.yaxis, symbol); |
|
2457 |
|
2458 ctx.strokeStyle = "rgba(0,0,0,0.2)"; |
|
2459 plotPoints(series.datapoints, radius, null, w/2, true, |
|
2460 series.xaxis, series.yaxis, symbol); |
|
2461 } |
|
2462 |
|
2463 ctx.lineWidth = lw; |
|
2464 ctx.strokeStyle = series.color; |
|
2465 plotPoints(series.datapoints, radius, |
|
2466 getFillStyle(series.points, series.color), 0, false, |
|
2467 series.xaxis, series.yaxis, symbol); |
|
2468 ctx.restore(); |
|
2469 } |
|
2470 |
|
2471 function drawBar(x, y, b, barLeft, barRight, offset, fillStyleCallback, axisx, axisy, c, horizontal, lineWidth) { |
|
2472 var left, right, bottom, top, |
|
2473 drawLeft, drawRight, drawTop, drawBottom, |
|
2474 tmp; |
|
2475 |
|
2476 // in horizontal mode, we start the bar from the left |
|
2477 // instead of from the bottom so it appears to be |
|
2478 // horizontal rather than vertical |
|
2479 if (horizontal) { |
|
2480 drawBottom = drawRight = drawTop = true; |
|
2481 drawLeft = false; |
|
2482 left = b; |
|
2483 right = x; |
|
2484 top = y + barLeft; |
|
2485 bottom = y + barRight; |
|
2486 |
|
2487 // account for negative bars |
|
2488 if (right < left) { |
|
2489 tmp = right; |
|
2490 right = left; |
|
2491 left = tmp; |
|
2492 drawLeft = true; |
|
2493 drawRight = false; |
|
2494 } |
|
2495 } |
|
2496 else { |
|
2497 drawLeft = drawRight = drawTop = true; |
|
2498 drawBottom = false; |
|
2499 left = x + barLeft; |
|
2500 right = x + barRight; |
|
2501 bottom = b; |
|
2502 top = y; |
|
2503 |
|
2504 // account for negative bars |
|
2505 if (top < bottom) { |
|
2506 tmp = top; |
|
2507 top = bottom; |
|
2508 bottom = tmp; |
|
2509 drawBottom = true; |
|
2510 drawTop = false; |
|
2511 } |
|
2512 } |
|
2513 |
|
2514 // clip |
|
2515 if (right < axisx.min || left > axisx.max || |
|
2516 top < axisy.min || bottom > axisy.max) |
|
2517 return; |
|
2518 |
|
2519 if (left < axisx.min) { |
|
2520 left = axisx.min; |
|
2521 drawLeft = false; |
|
2522 } |
|
2523 |
|
2524 if (right > axisx.max) { |
|
2525 right = axisx.max; |
|
2526 drawRight = false; |
|
2527 } |
|
2528 |
|
2529 if (bottom < axisy.min) { |
|
2530 bottom = axisy.min; |
|
2531 drawBottom = false; |
|
2532 } |
|
2533 |
|
2534 if (top > axisy.max) { |
|
2535 top = axisy.max; |
|
2536 drawTop = false; |
|
2537 } |
|
2538 |
|
2539 left = axisx.p2c(left); |
|
2540 bottom = axisy.p2c(bottom); |
|
2541 right = axisx.p2c(right); |
|
2542 top = axisy.p2c(top); |
|
2543 |
|
2544 // fill the bar |
|
2545 if (fillStyleCallback) { |
|
2546 c.beginPath(); |
|
2547 c.moveTo(left, bottom); |
|
2548 c.lineTo(left, top); |
|
2549 c.lineTo(right, top); |
|
2550 c.lineTo(right, bottom); |
|
2551 c.fillStyle = fillStyleCallback(bottom, top); |
|
2552 c.fill(); |
|
2553 } |
|
2554 |
|
2555 // draw outline |
|
2556 if (lineWidth > 0 && (drawLeft || drawRight || drawTop || drawBottom)) { |
|
2557 c.beginPath(); |
|
2558 |
|
2559 // FIXME: inline moveTo is buggy with excanvas |
|
2560 c.moveTo(left, bottom + offset); |
|
2561 if (drawLeft) |
|
2562 c.lineTo(left, top + offset); |
|
2563 else |
|
2564 c.moveTo(left, top + offset); |
|
2565 if (drawTop) |
|
2566 c.lineTo(right, top + offset); |
|
2567 else |
|
2568 c.moveTo(right, top + offset); |
|
2569 if (drawRight) |
|
2570 c.lineTo(right, bottom + offset); |
|
2571 else |
|
2572 c.moveTo(right, bottom + offset); |
|
2573 if (drawBottom) |
|
2574 c.lineTo(left, bottom + offset); |
|
2575 else |
|
2576 c.moveTo(left, bottom + offset); |
|
2577 c.stroke(); |
|
2578 } |
|
2579 } |
|
2580 |
|
2581 function drawSeriesBars(series) { |
|
2582 function plotBars(datapoints, barLeft, barRight, offset, fillStyleCallback, axisx, axisy) { |
|
2583 var points = datapoints.points, ps = datapoints.pointsize; |
|
2584 |
|
2585 for (var i = 0; i < points.length; i += ps) { |
|
2586 if (points[i] == null) |
|
2587 continue; |
|
2588 drawBar(points[i], points[i + 1], points[i + 2], barLeft, barRight, offset, fillStyleCallback, axisx, axisy, ctx, series.bars.horizontal, series.bars.lineWidth); |
|
2589 } |
|
2590 } |
|
2591 |
|
2592 ctx.save(); |
|
2593 ctx.translate(plotOffset.left, plotOffset.top); |
|
2594 |
|
2595 // FIXME: figure out a way to add shadows (for instance along the right edge) |
|
2596 ctx.lineWidth = series.bars.lineWidth; |
|
2597 ctx.strokeStyle = series.color; |
|
2598 |
|
2599 var barLeft; |
|
2600 |
|
2601 switch (series.bars.align) { |
|
2602 case "left": |
|
2603 barLeft = 0; |
|
2604 break; |
|
2605 case "right": |
|
2606 barLeft = -series.bars.barWidth; |
|
2607 break; |
|
2608 case "center": |
|
2609 barLeft = -series.bars.barWidth / 2; |
|
2610 break; |
|
2611 default: |
|
2612 throw new Error("Invalid bar alignment: " + series.bars.align); |
|
2613 } |
|
2614 |
|
2615 var fillStyleCallback = series.bars.fill ? function (bottom, top) { return getFillStyle(series.bars, series.color, bottom, top); } : null; |
|
2616 plotBars(series.datapoints, barLeft, barLeft + series.bars.barWidth, 0, fillStyleCallback, series.xaxis, series.yaxis); |
|
2617 ctx.restore(); |
|
2618 } |
|
2619 |
|
2620 function getFillStyle(filloptions, seriesColor, bottom, top) { |
|
2621 var fill = filloptions.fill; |
|
2622 if (!fill) |
|
2623 return null; |
|
2624 |
|
2625 if (filloptions.fillColor) |
|
2626 return getColorOrGradient(filloptions.fillColor, bottom, top, seriesColor); |
|
2627 |
|
2628 var c = $.color.parse(seriesColor); |
|
2629 c.a = typeof fill == "number" ? fill : 0.4; |
|
2630 c.normalize(); |
|
2631 return c.toString(); |
|
2632 } |
|
2633 |
|
2634 function insertLegend() { |
|
2635 |
|
2636 placeholder.find(".legend").remove(); |
|
2637 |
|
2638 if (!options.legend.show) |
|
2639 return; |
|
2640 |
|
2641 var fragments = [], entries = [], rowStarted = false, |
|
2642 lf = options.legend.labelFormatter, s, label; |
|
2643 |
|
2644 // Build a list of legend entries, with each having a label and a color |
|
2645 |
|
2646 for (var i = 0; i < series.length; ++i) { |
|
2647 s = series[i]; |
|
2648 if (s.label) { |
|
2649 label = lf ? lf(s.label, s) : s.label; |
|
2650 if (label) { |
|
2651 entries.push({ |
|
2652 label: label, |
|
2653 color: s.color |
|
2654 }); |
|
2655 } |
|
2656 } |
|
2657 } |
|
2658 |
|
2659 // Sort the legend using either the default or a custom comparator |
|
2660 |
|
2661 if (options.legend.sorted) { |
|
2662 if ($.isFunction(options.legend.sorted)) { |
|
2663 entries.sort(options.legend.sorted); |
|
2664 } else if (options.legend.sorted == "reverse") { |
|
2665 entries.reverse(); |
|
2666 } else { |
|
2667 var ascending = options.legend.sorted != "descending"; |
|
2668 entries.sort(function(a, b) { |
|
2669 return a.label == b.label ? 0 : ( |
|
2670 (a.label < b.label) != ascending ? 1 : -1 // Logical XOR |
|
2671 ); |
|
2672 }); |
|
2673 } |
|
2674 } |
|
2675 |
|
2676 // Generate markup for the list of entries, in their final order |
|
2677 |
|
2678 for (var i = 0; i < entries.length; ++i) { |
|
2679 |
|
2680 var entry = entries[i]; |
|
2681 |
|
2682 if (i % options.legend.noColumns == 0) { |
|
2683 if (rowStarted) |
|
2684 fragments.push('</tr>'); |
|
2685 fragments.push('<tr>'); |
|
2686 rowStarted = true; |
|
2687 } |
|
2688 |
|
2689 fragments.push( |
|
2690 '<td class="legendColorBox"><div style="border:1px solid ' + options.legend.labelBoxBorderColor + ';padding:1px"><div style="width:4px;height:0;border:5px solid ' + entry.color + ';overflow:hidden"></div></div></td>' + |
|
2691 '<td class="legendLabel">' + entry.label + '</td>' |
|
2692 ); |
|
2693 } |
|
2694 |
|
2695 if (rowStarted) |
|
2696 fragments.push('</tr>'); |
|
2697 |
|
2698 if (fragments.length == 0) |
|
2699 return; |
|
2700 |
|
2701 var table = '<table style="font-size:smaller;color:' + options.grid.color + '">' + fragments.join("") + '</table>'; |
|
2702 if (options.legend.container != null) |
|
2703 $(options.legend.container).html(table); |
|
2704 else { |
|
2705 var pos = "", |
|
2706 p = options.legend.position, |
|
2707 m = options.legend.margin; |
|
2708 if (m[0] == null) |
|
2709 m = [m, m]; |
|
2710 if (p.charAt(0) == "n") |
|
2711 pos += 'top:' + (m[1] + plotOffset.top) + 'px;'; |
|
2712 else if (p.charAt(0) == "s") |
|
2713 pos += 'bottom:' + (m[1] + plotOffset.bottom) + 'px;'; |
|
2714 if (p.charAt(1) == "e") |
|
2715 pos += 'right:' + (m[0] + plotOffset.right) + 'px;'; |
|
2716 else if (p.charAt(1) == "w") |
|
2717 pos += 'left:' + (m[0] + plotOffset.left) + 'px;'; |
|
2718 var legend = $('<div class="legend">' + table.replace('style="', 'style="position:absolute;' + pos +';') + '</div>').appendTo(placeholder); |
|
2719 if (options.legend.backgroundOpacity != 0.0) { |
|
2720 // put in the transparent background |
|
2721 // separately to avoid blended labels and |
|
2722 // label boxes |
|
2723 var c = options.legend.backgroundColor; |
|
2724 if (c == null) { |
|
2725 c = options.grid.backgroundColor; |
|
2726 if (c && typeof c == "string") |
|
2727 c = $.color.parse(c); |
|
2728 else |
|
2729 c = $.color.extract(legend, 'background-color'); |
|
2730 c.a = 1; |
|
2731 c = c.toString(); |
|
2732 } |
|
2733 var div = legend.children(); |
|
2734 $('<div style="position:absolute;width:' + div.width() + 'px;height:' + div.height() + 'px;' + pos +'background-color:' + c + ';"> </div>').prependTo(legend).css('opacity', options.legend.backgroundOpacity); |
|
2735 } |
|
2736 } |
|
2737 } |
|
2738 |
|
2739 |
|
2740 // interactive features |
|
2741 |
|
2742 var highlights = [], |
|
2743 redrawTimeout = null; |
|
2744 |
|
2745 // returns the data item the mouse is over, or null if none is found |
|
2746 function findNearbyItem(mouseX, mouseY, seriesFilter) { |
|
2747 var maxDistance = options.grid.mouseActiveRadius, |
|
2748 smallestDistance = maxDistance * maxDistance + 1, |
|
2749 item = null, foundPoint = false, i, j, ps; |
|
2750 |
|
2751 for (i = series.length - 1; i >= 0; --i) { |
|
2752 if (!seriesFilter(series[i])) |
|
2753 continue; |
|
2754 |
|
2755 var s = series[i], |
|
2756 axisx = s.xaxis, |
|
2757 axisy = s.yaxis, |
|
2758 points = s.datapoints.points, |
|
2759 mx = axisx.c2p(mouseX), // precompute some stuff to make the loop faster |
|
2760 my = axisy.c2p(mouseY), |
|
2761 maxx = maxDistance / axisx.scale, |
|
2762 maxy = maxDistance / axisy.scale; |
|
2763 |
|
2764 ps = s.datapoints.pointsize; |
|
2765 // with inverse transforms, we can't use the maxx/maxy |
|
2766 // optimization, sadly |
|
2767 if (axisx.options.inverseTransform) |
|
2768 maxx = Number.MAX_VALUE; |
|
2769 if (axisy.options.inverseTransform) |
|
2770 maxy = Number.MAX_VALUE; |
|
2771 |
|
2772 if (s.lines.show || s.points.show) { |
|
2773 for (j = 0; j < points.length; j += ps) { |
|
2774 var x = points[j], y = points[j + 1]; |
|
2775 if (x == null) |
|
2776 continue; |
|
2777 |
|
2778 // For points and lines, the cursor must be within a |
|
2779 // certain distance to the data point |
|
2780 if (x - mx > maxx || x - mx < -maxx || |
|
2781 y - my > maxy || y - my < -maxy) |
|
2782 continue; |
|
2783 |
|
2784 // We have to calculate distances in pixels, not in |
|
2785 // data units, because the scales of the axes may be different |
|
2786 var dx = Math.abs(axisx.p2c(x) - mouseX), |
|
2787 dy = Math.abs(axisy.p2c(y) - mouseY), |
|
2788 dist = dx * dx + dy * dy; // we save the sqrt |
|
2789 |
|
2790 // use <= to ensure last point takes precedence |
|
2791 // (last generally means on top of) |
|
2792 if (dist < smallestDistance) { |
|
2793 smallestDistance = dist; |
|
2794 item = [i, j / ps]; |
|
2795 } |
|
2796 } |
|
2797 } |
|
2798 |
|
2799 if (s.bars.show && !item) { // no other point can be nearby |
|
2800 var barLeft = s.bars.align == "left" ? 0 : -s.bars.barWidth/2, |
|
2801 barRight = barLeft + s.bars.barWidth; |
|
2802 |
|
2803 for (j = 0; j < points.length; j += ps) { |
|
2804 var x = points[j], y = points[j + 1], b = points[j + 2]; |
|
2805 if (x == null) |
|
2806 continue; |
|
2807 |
|
2808 // for a bar graph, the cursor must be inside the bar |
|
2809 if (series[i].bars.horizontal ? |
|
2810 (mx <= Math.max(b, x) && mx >= Math.min(b, x) && |
|
2811 my >= y + barLeft && my <= y + barRight) : |
|
2812 (mx >= x + barLeft && mx <= x + barRight && |
|
2813 my >= Math.min(b, y) && my <= Math.max(b, y))) |
|
2814 item = [i, j / ps]; |
|
2815 } |
|
2816 } |
|
2817 } |
|
2818 |
|
2819 if (item) { |
|
2820 i = item[0]; |
|
2821 j = item[1]; |
|
2822 ps = series[i].datapoints.pointsize; |
|
2823 |
|
2824 return { datapoint: series[i].datapoints.points.slice(j * ps, (j + 1) * ps), |
|
2825 dataIndex: j, |
|
2826 series: series[i], |
|
2827 seriesIndex: i }; |
|
2828 } |
|
2829 |
|
2830 return null; |
|
2831 } |
|
2832 |
|
2833 function onMouseMove(e) { |
|
2834 if (options.grid.hoverable) |
|
2835 triggerClickHoverEvent("plothover", e, |
|
2836 function (s) { return s["hoverable"] != false; }); |
|
2837 } |
|
2838 |
|
2839 function onMouseLeave(e) { |
|
2840 if (options.grid.hoverable) |
|
2841 triggerClickHoverEvent("plothover", e, |
|
2842 function (s) { return false; }); |
|
2843 } |
|
2844 |
|
2845 function onClick(e) { |
|
2846 triggerClickHoverEvent("plotclick", e, |
|
2847 function (s) { return s["clickable"] != false; }); |
|
2848 } |
|
2849 |
|
2850 // trigger click or hover event (they send the same parameters |
|
2851 // so we share their code) |
|
2852 function triggerClickHoverEvent(eventname, event, seriesFilter) { |
|
2853 var offset = eventHolder.offset(), |
|
2854 canvasX = event.pageX - offset.left - plotOffset.left, |
|
2855 canvasY = event.pageY - offset.top - plotOffset.top, |
|
2856 pos = canvasToAxisCoords({ left: canvasX, top: canvasY }); |
|
2857 |
|
2858 pos.pageX = event.pageX; |
|
2859 pos.pageY = event.pageY; |
|
2860 |
|
2861 var item = findNearbyItem(canvasX, canvasY, seriesFilter); |
|
2862 |
|
2863 if (item) { |
|
2864 // fill in mouse pos for any listeners out there |
|
2865 item.pageX = parseInt(item.series.xaxis.p2c(item.datapoint[0]) + offset.left + plotOffset.left, 10); |
|
2866 item.pageY = parseInt(item.series.yaxis.p2c(item.datapoint[1]) + offset.top + plotOffset.top, 10); |
|
2867 } |
|
2868 |
|
2869 if (options.grid.autoHighlight) { |
|
2870 // clear auto-highlights |
|
2871 for (var i = 0; i < highlights.length; ++i) { |
|
2872 var h = highlights[i]; |
|
2873 if (h.auto == eventname && |
|
2874 !(item && h.series == item.series && |
|
2875 h.point[0] == item.datapoint[0] && |
|
2876 h.point[1] == item.datapoint[1])) |
|
2877 unhighlight(h.series, h.point); |
|
2878 } |
|
2879 |
|
2880 if (item) |
|
2881 highlight(item.series, item.datapoint, eventname); |
|
2882 } |
|
2883 |
|
2884 placeholder.trigger(eventname, [ pos, item ]); |
|
2885 } |
|
2886 |
|
2887 function triggerRedrawOverlay() { |
|
2888 var t = options.interaction.redrawOverlayInterval; |
|
2889 if (t == -1) { // skip event queue |
|
2890 drawOverlay(); |
|
2891 return; |
|
2892 } |
|
2893 |
|
2894 if (!redrawTimeout) |
|
2895 redrawTimeout = setTimeout(drawOverlay, t); |
|
2896 } |
|
2897 |
|
2898 function drawOverlay() { |
|
2899 redrawTimeout = null; |
|
2900 |
|
2901 // draw highlights |
|
2902 octx.save(); |
|
2903 overlay.clear(); |
|
2904 octx.translate(plotOffset.left, plotOffset.top); |
|
2905 |
|
2906 var i, hi; |
|
2907 for (i = 0; i < highlights.length; ++i) { |
|
2908 hi = highlights[i]; |
|
2909 |
|
2910 if (hi.series.bars.show) |
|
2911 drawBarHighlight(hi.series, hi.point); |
|
2912 else |
|
2913 drawPointHighlight(hi.series, hi.point); |
|
2914 } |
|
2915 octx.restore(); |
|
2916 |
|
2917 executeHooks(hooks.drawOverlay, [octx]); |
|
2918 } |
|
2919 |
|
2920 function highlight(s, point, auto) { |
|
2921 if (typeof s == "number") |
|
2922 s = series[s]; |
|
2923 |
|
2924 if (typeof point == "number") { |
|
2925 var ps = s.datapoints.pointsize; |
|
2926 point = s.datapoints.points.slice(ps * point, ps * (point + 1)); |
|
2927 } |
|
2928 |
|
2929 var i = indexOfHighlight(s, point); |
|
2930 if (i == -1) { |
|
2931 highlights.push({ series: s, point: point, auto: auto }); |
|
2932 |
|
2933 triggerRedrawOverlay(); |
|
2934 } |
|
2935 else if (!auto) |
|
2936 highlights[i].auto = false; |
|
2937 } |
|
2938 |
|
2939 function unhighlight(s, point) { |
|
2940 if (s == null && point == null) { |
|
2941 highlights = []; |
|
2942 triggerRedrawOverlay(); |
|
2943 return; |
|
2944 } |
|
2945 |
|
2946 if (typeof s == "number") |
|
2947 s = series[s]; |
|
2948 |
|
2949 if (typeof point == "number") { |
|
2950 var ps = s.datapoints.pointsize; |
|
2951 point = s.datapoints.points.slice(ps * point, ps * (point + 1)); |
|
2952 } |
|
2953 |
|
2954 var i = indexOfHighlight(s, point); |
|
2955 if (i != -1) { |
|
2956 highlights.splice(i, 1); |
|
2957 |
|
2958 triggerRedrawOverlay(); |
|
2959 } |
|
2960 } |
|
2961 |
|
2962 function indexOfHighlight(s, p) { |
|
2963 for (var i = 0; i < highlights.length; ++i) { |
|
2964 var h = highlights[i]; |
|
2965 if (h.series == s && h.point[0] == p[0] |
|
2966 && h.point[1] == p[1]) |
|
2967 return i; |
|
2968 } |
|
2969 return -1; |
|
2970 } |
|
2971 |
|
2972 function drawPointHighlight(series, point) { |
|
2973 var x = point[0], y = point[1], |
|
2974 axisx = series.xaxis, axisy = series.yaxis, |
|
2975 highlightColor = (typeof series.highlightColor === "string") ? series.highlightColor : $.color.parse(series.color).scale('a', 0.5).toString(); |
|
2976 |
|
2977 if (x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max) |
|
2978 return; |
|
2979 |
|
2980 var pointRadius = series.points.radius + series.points.lineWidth / 2; |
|
2981 octx.lineWidth = pointRadius; |
|
2982 octx.strokeStyle = highlightColor; |
|
2983 var radius = 1.5 * pointRadius; |
|
2984 x = axisx.p2c(x); |
|
2985 y = axisy.p2c(y); |
|
2986 |
|
2987 octx.beginPath(); |
|
2988 if (series.points.symbol == "circle") |
|
2989 octx.arc(x, y, radius, 0, 2 * Math.PI, false); |
|
2990 else |
|
2991 series.points.symbol(octx, x, y, radius, false); |
|
2992 octx.closePath(); |
|
2993 octx.stroke(); |
|
2994 } |
|
2995 |
|
2996 function drawBarHighlight(series, point) { |
|
2997 var highlightColor = (typeof series.highlightColor === "string") ? series.highlightColor : $.color.parse(series.color).scale('a', 0.5).toString(), |
|
2998 fillStyle = highlightColor, |
|
2999 barLeft = series.bars.align == "left" ? 0 : -series.bars.barWidth/2; |
|
3000 |
|
3001 octx.lineWidth = series.bars.lineWidth; |
|
3002 octx.strokeStyle = highlightColor; |
|
3003 |
|
3004 drawBar(point[0], point[1], point[2] || 0, barLeft, barLeft + series.bars.barWidth, |
|
3005 0, function () { return fillStyle; }, series.xaxis, series.yaxis, octx, series.bars.horizontal, series.bars.lineWidth); |
|
3006 } |
|
3007 |
|
3008 function getColorOrGradient(spec, bottom, top, defaultColor) { |
|
3009 if (typeof spec == "string") |
|
3010 return spec; |
|
3011 else { |
|
3012 // assume this is a gradient spec; IE currently only |
|
3013 // supports a simple vertical gradient properly, so that's |
|
3014 // what we support too |
|
3015 var gradient = ctx.createLinearGradient(0, top, 0, bottom); |
|
3016 |
|
3017 for (var i = 0, l = spec.colors.length; i < l; ++i) { |
|
3018 var c = spec.colors[i]; |
|
3019 if (typeof c != "string") { |
|
3020 var co = $.color.parse(defaultColor); |
|
3021 if (c.brightness != null) |
|
3022 co = co.scale('rgb', c.brightness); |
|
3023 if (c.opacity != null) |
|
3024 co.a *= c.opacity; |
|
3025 c = co.toString(); |
|
3026 } |
|
3027 gradient.addColorStop(i / (l - 1), c); |
|
3028 } |
|
3029 |
|
3030 return gradient; |
|
3031 } |
|
3032 } |
|
3033 } |
|
3034 |
|
3035 // Add the plot function to the top level of the jQuery object |
|
3036 |
|
3037 $.plot = function(placeholder, data, options) { |
|
3038 //var t0 = new Date(); |
|
3039 var plot = new Plot($(placeholder), data, options, $.plot.plugins); |
|
3040 //(window.console ? console.log : alert)("time used (msecs): " + ((new Date()).getTime() - t0.getTime())); |
|
3041 return plot; |
|
3042 }; |
|
3043 |
|
3044 $.plot.version = "0.8.1"; |
|
3045 |
|
3046 $.plot.plugins = []; |
|
3047 |
|
3048 // Also add the plot function as a chainable property |
|
3049 |
|
3050 $.fn.plot = function(data, options) { |
|
3051 return this.each(function() { |
|
3052 $.plot(this, data, options); |
|
3053 }); |
|
3054 }; |
|
3055 |
|
3056 // round to nearby lower multiple of base |
|
3057 function floorInBase(n, base) { |
|
3058 return base * Math.floor(n / base); |
|
3059 } |
|
3060 |
|
3061 })(jQuery); |