vendor: 59,363 bytes, lines 1-1490
1/* Javascript plotting library for jQuery, version 0.8.2. 2 3Copyright (c) 2007-2013 IOLA and Ole Laursen. 4Licensed under the MIT license. 5 6*/ 7 8// first an inline dependency, jquery.colorhelpers.js, we inline it here 9// for convenience 10 11/* Plugin for jQuery for working with colors. 12 * 13 * Version 1.1. 14 * 15 * Inspiration from jQuery color animation plugin by John Resig. 16 * 17 * Released under the MIT license by Ole Laursen, October 2009. 18 * 19 * Examples: 20 * 21 * $.color.parse("#fff").scale('rgb', 0.25).add('a', -0.5).toString() 22 * var c = $.color.extract($("#mydiv"), 'background-color'); 23 * console.log(c.r, c.g, c.b, c.a); 24 * $.color.make(100, 50, 25, 0.4).toString() // returns "rgba(100,50,25,0.4)" 25 * 26 * Note that .scale() and .add() return the same modified object 27 * instead of making a new one. 28 * 29 * V. 1.1: Fix error handling so e.g. parsing an empty string does 30 * produce a color rather than just crashing. 31 */ 32(function($){$.color={};$.color.make=function(r,g,b,a){var o={};o.r=r||0;o.g=g||0;o.b=b||0;o.a=a!=null?a:1;o.add=function(c,d){for(var i=0;i<c.length;++i)o[c.charAt(i)]+=d;return o.normalize()};o.scale=function(c,f){for(var i=0;i<c.length;++i)o[c.charAt(i)]*=f;return o.normalize()};o.toString=function(){if(o.a>=1){return"rgb("+[o.r,o.g,o.b].join(",")+")"}else{return"rgba("+[o.r,o.g,o.b,o.a].join(",")+")"}};o.normalize=function(){function clamp(min,value,max){return value<min?min:value>max?max:value}o.r=clamp(0,parseInt(o.r),255);o.g=clamp(0,parseInt(o.g),255);o.b=clamp(0,parseInt(o.b),255);o.a=clamp(0,o.a,1);return o};o.clone=function(){return $.color.make(o.r,o.b,o.g,o.a)};return o.normalize()};$.color.extract=function(elem,css){var c;do{c=elem.css(css).toLowerCase();if(c!=""&&c!="transparent")break;elem=elem.parent()}while(elem.length&&!$.nodeName(elem.get(0),"body"));if(c=="rgba(0, 0, 0, 0)")c="transparent";return $.color.parse(c)};$.color.parse=function(str){var res,m=$.color.make;if(res=/rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(str))return m(parseInt(res[1],10),parseInt(res[2],10),parseInt(res[3],10));if(res=/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(str))return m(parseInt(res[1],10),parseInt(res[2],10),parseInt(res[3],10),parseFloat(res[4]));if(res=/rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(str))return m(parseFloat(res[1])*2.55,parseFloat(res[2])*2.55,parseFloat(res[3])*2.55);if(res=/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(str))return m(parseFloat(res[1])*2.55,parseFloat(res[2])*2.55,parseFloat(res[3])*2.55,parseFloat(res[4]));if(res=/#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(str))return m(parseInt(res[1],16),parseInt(res[2],16),parseInt(res[3],16));if(res=/#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(str))return m(parseInt(res[1]+res[1],16),parseInt(res[2]+res[2],16),parseInt(res[3]+res[3],16));var name=$.trim(str).toLowerCase();if(name=="transparent")return m(255,255,255,0);else{res=lookupColors[name]||[0,0,0];return m(res[0],res[1],res[2])}};var lookupColors={aqua:[0,255,255],azure:[240,255,255],beige:[245,245,220],black:[0,0,0],blue:[0,0,255],brown:[165,42,42],cyan:[0,255,255],darkblue:[0,0,139],darkcyan:[0,139,139],darkgrey:[169,169,169],darkgreen:[0,100,0],darkkhaki:[189,183,107],darkmagenta:[139,0,139],darkolivegreen:[85,107,47],darkorange:[255,140,0],darkorchid:[153,50,204],darkred:[139,0,0],darksalmon:[233,150,122],darkviolet:[148,0,211],fuchsia:[255,0,255],gold:[255,215,0],green:[0,128,0],indigo:[75,0,130],khaki:[240,230,140],lightblue:[173,216,230],lightcyan:[224,255,255],lightgreen:[144,238,144],lightgrey:[211,211,211],lightpink:[255,182,193],lightyellow:[255,255,224],lime:[0,255,0],magenta:[255,0,255],maroon:[128,0,0],navy:[0,0,128],olive:[128,128,0],orange:[255,165,0],pink:[255,192,203],purple:[128,0,128],violet:[128,0,128],red:[255,0,0],silver:[192,192,192],white:[255,255,255],yellow:[255,255,0]}})(jQuery); 33 34// the actual Flot code 35(function($) { 36 37 // Cache the prototype hasOwnProperty for faster access 38 39 var hasOwnProperty = Object.prototype.hasOwnProperty; 40 41 /////////////////////////////////////////////////////////////////////////// 42 // The Canvas object is a wrapper around an HTML5 <canvas> tag. 43 // 44 // @constructor 45 // @param {string} cls List of classes to apply to the canvas. 46 // @param {element} container Element onto which to append the canvas. 47 // 48 // Requiring a container is a little iffy, but unfortunately canvas 49 // operations don't work unless the canvas is attached to the DOM. 50 51 function Canvas(cls, container) { 52 53 var element = container.children("." + cls)[0]; 54 55 if (element == null) { 56 57 element = document.createElement("canvas"); 58 element.className = cls; 59 60 $(element).css({ direction: "ltr", position: "absolute", left: 0, top: 0 }) 61 .appendTo(container); 62 63 // If HTML5 Canvas isn't available, fall back to [Ex|Flash]canvas 64 65 if (!element.getContext) { 66 if (window.G_vmlCanvasManager) { 67 element = window.G_vmlCanvasManager.initElement(element); 68 } else { 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."); 70 } 71 } 72 } 73 74 this.element = element; 75 76 var context = this.context = element.getContext("2d"); 77 78 // Determine the screen's ratio of physical to device-independent 79 // pixels. This is the ratio between the canvas width that the browser 80 // advertises and the number of pixels actually present in that space. 81 82 // The iPhone 4, for example, has a device-independent width of 320px, 83 // but its screen is actually 640px wide. It therefore has a pixel 84 // ratio of 2, while most normal devices have a ratio of 1. 85 86 var devicePixelRatio = window.devicePixelRatio || 1, 87 backingStoreRatio = 88 context.webkitBackingStorePixelRatio || 89 context.mozBackingStorePixelRatio || 90 context.msBackingStorePixelRatio || 91 context.oBackingStorePixelRatio || 92 context.backingStorePixelRatio || 1; 93 94 this.pixelRatio = devicePixelRatio / backingStoreRatio; 95 96 // Size the canvas to match the internal dimensions of its container 97 98 this.resize(container.width(), container.height()); 99 100 // Collection of HTML div layers for text overlaid onto the canvas 101 102 this.textContainer = null; 103 this.text = {}; 104 105 // Cache of text fragments and metrics, so we can avoid expensively 106 // re-calculating them when the plot is re-rendered in a loop. 107 108 this._textCache = {}; 109 } 110 111 // Resizes the canvas to the given dimensions. 112 // 113 // @param {number} width New width of the canvas, in pixels. 114 // @param {number} width New height of the canvas, in pixels. 115 116 Canvas.prototype.resize = function(width, height) { 117 118 if (width <= 0 || height <= 0) { 119 throw new Error("Invalid dimensions for plot, width = " + width + ", height = " + height); 120 } 121 122 var element = this.element, 123 context = this.context, 124 pixelRatio = this.pixelRatio; 125 126 // Resize the canvas, increasing its density based on the display's 127 // pixel ratio; basically giving it more pixels without increasing the 128 // size of its element, to take advantage of the fact that retina 129 // displays have that many more pixels in the same advertised space. 130 131 // Resizing should reset the state (excanvas seems to be buggy though) 132 133 if (this.width != width) { 134 element.width = width * pixelRatio; 135 element.style.width = width + "px"; 136 this.width = width; 137 } 138 139 if (this.height != height) { 140 element.height = height * pixelRatio; 141 element.style.height = height + "px"; 142 this.height = height; 143 } 144 145 // Save the context, so we can reset in case we get replotted. The 146 // restore ensure that we're really back at the initial state, and 147 // should be safe even if we haven't saved the initial state yet. 148 149 context.restore(); 150 context.save(); 151 152 // Scale the coordinate space to match the display density; so even though we 153 // may have twice as many pixels, we still want lines and other drawing to 154 // appear at the same size; the extra pixels will just make them crisper. 155 156 context.scale(pixelRatio, pixelRatio); 157 }; 158 159 // Clears the entire canvas area, not including any overlaid HTML text 160 161 Canvas.prototype.clear = function() { 162 this.context.clearRect(0, 0, this.width, this.height); 163 }; 164 165 // Finishes rendering the canvas, including managing the text overlay. 166 167 Canvas.prototype.render = function() { 168 169 var cache = this._textCache; 170 171 // For each text layer, add elements marked as active that haven't 172 // already been rendered, and remove those that are no longer active. 173 174 for (var layerKey in cache) { 175 if (hasOwnProperty.call(cache, layerKey)) { 176 177 var layer = this.getTextLayer(layerKey), 178 layerCache = cache[layerKey]; 179 180 layer.hide(); 181 182 for (var styleKey in layerCache) { 183 if (hasOwnProperty.call(layerCache, styleKey)) { 184 var styleCache = layerCache[styleKey]; 185 for (var key in styleCache) { 186 if (hasOwnProperty.call(styleCache, key)) { 187 188 var positions = styleCache[key].positions; 189 190 for (var i = 0, position; position = positions[i]; i++) { 191 if (position.active) { 192 if (!position.rendered) { 193 layer.append(position.element); 194 position.rendered = true; 195 } 196 } else { 197 positions.splice(i--, 1); 198 if (position.rendered) { 199 position.element.detach(); 200 } 201 } 202 } 203 204 if (positions.length == 0) { 205 delete styleCache[key]; 206 } 207 } 208 } 209 } 210 } 211 212 layer.show(); 213 } 214 } 215 }; 216 217 // Creates (if necessary) and returns the text overlay container. 218 // 219 // @param {string} classes String of space-separated CSS classes used to 220 // uniquely identify the text layer. 221 // @return {object} The jQuery-wrapped text-layer div. 222 223 Canvas.prototype.getTextLayer = function(classes) { 224 225 var layer = this.text[classes]; 226 227 // Create the text layer if it doesn't exist 228 229 if (layer == null) { 230 231 // Create the text layer container, if it doesn't exist 232 233 if (this.textContainer == null) { 234 this.textContainer = $("<div class='flot-text'></div>") 235 .css({ 236 position: "absolute", 237 top: 0, 238 left: 0, 239 bottom: 0, 240 right: 0, 241 'font-size': "smaller", 242 color: "#545454" 243 }) 244 .insertAfter(this.element); 245 } 246 247 layer = this.text[classes] = $("<div></div>") 248 .addClass(classes) 249 .css({ 250 position: "absolute", 251 top: 0, 252 left: 0, 253 bottom: 0, 254 right: 0 255 }) 256 .appendTo(this.textContainer); 257 } 258 259 return layer; 260 }; 261 262 // Creates (if necessary) and returns a text info object. 263 // 264 // The object looks like this: 265 // 266 // { 267 // width: Width of the text's wrapper div. 268 // height: Height of the text's wrapper div. 269 // element: The jQuery-wrapped HTML div containing the text. 270 // positions: Array of positions at which this text is drawn. 271 // } 272 // 273 // The positions array contains objects that look like this: 274 // 275 // { 276 // active: Flag indicating whether the text should be visible. 277 // rendered: Flag indicating whether the text is currently visible. 278 // element: The jQuery-wrapped HTML div containing the text. 279 // x: X coordinate at which to draw the text. 280 // y: Y coordinate at which to draw the text. 281 // } 282 // 283 // Each position after the first receives a clone of the original element. 284 // 285 // The idea is that that the width, height, and general 'identity' of the 286 // text is constant no matter where it is placed; the placements are a 287 // secondary property. 288 // 289 // Canvas maintains a cache of recently-used text info objects; getTextInfo 290 // either returns the cached element or creates a new entry. 291 // 292 // @param {string} layer A string of space-separated CSS classes uniquely 293 // identifying the layer containing this text. 294 // @param {string} text Text string to retrieve info for. 295 // @param {(string|object)=} font Either a string of space-separated CSS 296 // classes or a font-spec object, defining the text's font and style. 297 // @param {number=} angle Angle at which to rotate the text, in degrees. 298 // Angle is currently unused, it will be implemented in the future. 299 // @param {number=} width Maximum width of the text before it wraps. 300 // @return {object} a text info object. 301 302 Canvas.prototype.getTextInfo = function(layer, text, font, angle, width) { 303 304 var textStyle, layerCache, styleCache, info; 305 306 // Cast the value to a string, in case we were given a number or such 307 308 text = "" + text; 309 310 // If the font is a font-spec object, generate a CSS font definition 311 312 if (typeof font === "object") { 313 textStyle = font.style + " " + font.variant + " " + font.weight + " " + font.size + "px/" + font.lineHeight + "px " + font.family; 314 } else { 315 textStyle = font; 316 } 317 318 // Retrieve (or create) the cache for the text's layer and styles 319 320 layerCache = this._textCache[layer]; 321 322 if (layerCache == null) { 323 layerCache = this._textCache[layer] = {}; 324 } 325 326 styleCache = layerCache[textStyle]; 327 328 if (styleCache == null) { 329 styleCache = layerCache[textStyle] = {}; 330 } 331 332 info = styleCache[text]; 333 334 // If we can't find a matching element in our cache, create a new one 335 336 if (info == null) { 337 338 var element = $("<div></div>").html(text) 339 .css({ 340 position: "absolute", 341 'max-width': width, 342 top: -9999 343 }) 344 .appendTo(this.getTextLayer(layer)); 345 346 if (typeof font === "object") { 347 element.css({ 348 font: textStyle, 349 color: font.color 350 }); 351 } else if (typeof font === "string") { 352 element.addClass(font); 353 } 354 355 info = styleCache[text] = { 356 width: element.outerWidth(true), 357 height: element.outerHeight(true), 358 element: element, 359 positions: [] 360 }; 361 362 element.detach(); 363 } 364 365 return info; 366 }; 367 368 // Adds a text string to the canvas text overlay. 369 // 370 // The text isn't drawn immediately; it is marked as rendering, which will 371 // result in its addition to the canvas on the next render pass. 372 // 373 // @param {string} layer A string of space-separated CSS classes uniquely 374 // identifying the layer containing this text. 375 // @param {number} x X coordinate at which to draw the text. 376 // @param {number} y Y coordinate at which to draw the text. 377 // @param {string} text Text string to draw. 378 // @param {(string|object)=} font Either a string of space-separated CSS 379 // classes or a font-spec object, defining the text's font and style. 380 // @param {number=} angle Angle at which to rotate the text, in degrees. 381 // Angle is currently unused, it will be implemented in the future. 382 // @param {number=} width Maximum width of the text before it wraps. 383 // @param {string=} halign Horizontal alignment of the text; either "left", 384 // "center" or "right". 385 // @param {string=} valign Vertical alignment of the text; either "top", 386 // "middle" or "bottom". 387 388 Canvas.prototype.addText = function(layer, x, y, text, font, angle, width, halign, valign) { 389 390 var info = this.getTextInfo(layer, text, font, angle, width), 391 positions = info.positions; 392 393 // Tweak the div's position to match the text's alignment 394 395 if (halign == "center") { 396 x -= info.width / 2; 397 } else if (halign == "right") { 398 x -= info.width; 399 } 400 401 if (valign == "middle") { 402 y -= info.height / 2; 403 } else if (valign == "bottom") { 404 y -= info.height; 405 } 406 407 // Determine whether this text already exists at this position. 408 // If so, mark it for inclusion in the next render pass. 409 410 for (var i = 0, position; position = positions[i]; i++) { 411 if (position.x == x && position.y == y) { 412 position.active = true; 413 return; 414 } 415 } 416 417 // If the text doesn't exist at this position, create a new entry 418 419 // For the very first position we'll re-use the original element, 420 // while for subsequent ones we'll clone it. 421 422 position = { 423 active: true, 424 rendered: false, 425 element: positions.length ? info.element.clone() : info.element, 426 x: x, 427 y: y 428 }; 429 430 positions.push(position); 431 432 // Move the element to its final position within the container 433 434 position.element.css({ 435 top: Math.round(y), 436 left: Math.round(x), 437 'text-align': halign // In case the text wraps 438 }); 439 }; 440 441 // Removes one or more text strings from the canvas text overlay. 442 // 443 // If no parameters are given, all text within the layer is removed. 444 // 445 // Note that the text is not immediately removed; it is simply marked as 446 // inactive, which will result in its removal on the next render pass. 447 // This avoids the performance penalty for 'clear and redraw' behavior, 448 // where we potentially get rid of all text on a layer, but will likely 449 // add back most or all of it later, as when redrawing axes, for example. 450 // 451 // @param {string} layer A string of space-separated CSS classes uniquely 452 // identifying the layer containing this text. 453 // @param {number=} x X coordinate of the text. 454 // @param {number=} y Y coordinate of the text. 455 // @param {string=} text Text string to remove. 456 // @param {(string|object)=} font Either a string of space-separated CSS 457 // classes or a font-spec object, defining the text's font and style. 458 // @param {number=} angle Angle at which the text is rotated, in degrees. 459 // Angle is currently unused, it will be implemented in the future. 460 461 Canvas.prototype.removeText = function(layer, x, y, text, font, angle) { 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.destroy = function () { 662 shutdown(); 663 placeholder.removeData("plot").empty(); 664 665 series = []; 666 options = null; 667 surface = null; 668 overlay = null; 669 eventHolder = null; 670 ctx = null; 671 octx = null; 672 xaxes = []; 673 yaxes = []; 674 hooks = null; 675 highlights = []; 676 plot = null; 677 }; 678 plot.resize = function () { 679 var width = placeholder.width(), 680 height = placeholder.height(); 681 surface.resize(width, height); 682 overlay.resize(width, height); 683 }; 684 685 // public attributes 686 plot.hooks = hooks; 687 688 // initialize 689 initPlugins(plot); 690 parseOptions(options_); 691 setupCanvases(); 692 setData(data_); 693 setupGrid(); 694 draw(); 695 bindEvents(); 696 697 698 function executeHooks(hook, args) { 699 args = [plot].concat(args); 700 for (var i = 0; i < hook.length; ++i) 701 hook[i].apply(this, args); 702 } 703 704 function initPlugins() { 705 706 // References to key classes, allowing plugins to modify them 707 708 var classes = { 709 Canvas: Canvas 710 }; 711 712 for (var i = 0; i < plugins.length; ++i) { 713 var p = plugins[i]; 714 p.init(plot, classes); 715 if (p.options) 716 $.extend(true, options, p.options); 717 } 718 } 719 720 function parseOptions(opts) { 721 722 $.extend(true, options, opts); 723 724 // $.extend merges arrays, rather than replacing them. When less 725 // colors are provided than the size of the default palette, we 726 // end up with those colors plus the remaining defaults, which is 727 // not expected behavior; avoid it by replacing them here. 728 729 if (opts && opts.colors) { 730 options.colors = opts.colors; 731 } 732 733 if (options.xaxis.color == null) 734 options.xaxis.color = $.color.parse(options.grid.color).scale('a', 0.22).toString(); 735 if (options.yaxis.color == null) 736 options.yaxis.color = $.color.parse(options.grid.color).scale('a', 0.22).toString(); 737 738 if (options.xaxis.tickColor == null) // grid.tickColor for back-compatibility 739 options.xaxis.tickColor = options.grid.tickColor || options.xaxis.color; 740 if (options.yaxis.tickColor == null) // grid.tickColor for back-compatibility 741 options.yaxis.tickColor = options.grid.tickColor || options.yaxis.color; 742 743 if (options.grid.borderColor == null) 744 options.grid.borderColor = options.grid.color; 745 if (options.grid.tickColor == null) 746 options.grid.tickColor = $.color.parse(options.grid.color).scale('a', 0.22).toString(); 747 748 // Fill in defaults for axis options, including any unspecified 749 // font-spec fields, if a font-spec was provided. 750 751 // If no x/y axis options were provided, create one of each anyway, 752 // since the rest of the code assumes that they exist. 753 754 var i, axisOptions, axisCount, 755 fontSize = placeholder.css("font-size"), 756 fontSizeDefault = fontSize ? +fontSize.replace("px", "") : 13, 757 fontDefaults = { 758 style: placeholder.css("font-style"), 759 size: Math.round(0.8 * fontSizeDefault), 760 variant: placeholder.css("font-variant"), 761 weight: placeholder.css("font-weight"), 762 family: placeholder.css("font-family") 763 }; 764 765 axisCount = options.xaxes.length || 1; 766 for (i = 0; i < axisCount; ++i) { 767 768 axisOptions = options.xaxes[i]; 769 if (axisOptions && !axisOptions.tickColor) { 770 axisOptions.tickColor = axisOptions.color; 771 } 772 773 axisOptions = $.extend(true, {}, options.xaxis, axisOptions); 774 options.xaxes[i] = axisOptions; 775 776 if (axisOptions.font) { 777 axisOptions.font = $.extend({}, fontDefaults, axisOptions.font); 778 if (!axisOptions.font.color) { 779 axisOptions.font.color = axisOptions.color; 780 } 781 if (!axisOptions.font.lineHeight) { 782 axisOptions.font.lineHeight = Math.round(axisOptions.font.size * 1.15); 783 } 784 } 785 } 786 787 axisCount = options.yaxes.length || 1; 788 for (i = 0; i < axisCount; ++i) { 789 790 axisOptions = options.yaxes[i]; 791 if (axisOptions && !axisOptions.tickColor) { 792 axisOptions.tickColor = axisOptions.color; 793 } 794 795 axisOptions = $.extend(true, {}, options.yaxis, axisOptions); 796 options.yaxes[i] = axisOptions; 797 798 if (axisOptions.font) { 799 axisOptions.font = $.extend({}, fontDefaults, axisOptions.font); 800 if (!axisOptions.font.color) { 801 axisOptions.font.color = axisOptions.color; 802 } 803 if (!axisOptions.font.lineHeight) { 804 axisOptions.font.lineHeight = Math.round(axisOptions.font.size * 1.15); 805 } 806 } 807 } 808 809 // backwards compatibility, to be removed in future 810 if (options.xaxis.noTicks && options.xaxis.ticks == null) 811 options.xaxis.ticks = options.xaxis.noTicks; 812 if (options.yaxis.noTicks && options.yaxis.ticks == null) 813 options.yaxis.ticks = options.yaxis.noTicks; 814 if (options.x2axis) { 815 options.xaxes[1] = $.extend(true, {}, options.xaxis, options.x2axis); 816 options.xaxes[1].position = "top"; 817 } 818 if (options.y2axis) { 819 options.yaxes[1] = $.extend(true, {}, options.yaxis, options.y2axis); 820 options.yaxes[1].position = "right"; 821 } 822 if (options.grid.coloredAreas) 823 options.grid.markings = options.grid.coloredAreas; 824 if (options.grid.coloredAreasColor) 825 options.grid.markingsColor = options.grid.coloredAreasColor; 826 if (options.lines) 827 $.extend(true, options.series.lines, options.lines); 828 if (options.points) 829 $.extend(true, options.series.points, options.points); 830 if (options.bars) 831 $.extend(true, options.series.bars, options.bars); 832 if (options.shadowSize != null) 833 options.series.shadowSize = options.shadowSize; 834 if (options.highlightColor != null) 835 options.series.highlightColor = options.highlightColor; 836 837 // save options on axes for future reference 838 for (i = 0; i < options.xaxes.length; ++i) 839 getOrCreateAxis(xaxes, i + 1).options = options.xaxes[i]; 840 for (i = 0; i < options.yaxes.length; ++i) 841 getOrCreateAxis(yaxes, i + 1).options = options.yaxes[i]; 842 843 // add hooks from options 844 for (var n in hooks) 845 if (options.hooks[n] && options.hooks[n].length) 846 hooks[n] = hooks[n].concat(options.hooks[n]); 847 848 executeHooks(hooks.processOptions, [options]); 849 } 850 851 function setData(d) { 852 series = parseData(d); 853 fillInSeriesOptions(); 854 processData(); 855 } 856 857 function parseData(d) { 858 var res = []; 859 for (var i = 0; i < d.length; ++i) { 860 var s = $.extend(true, {}, options.series); 861 862 if (d[i].data != null) { 863 s.data = d[i].data; // move the data instead of deep-copy 864 delete d[i].data; 865 866 $.extend(true, s, d[i]); 867 868 d[i].data = s.data; 869 } 870 else 871 s.data = d[i]; 872 res.push(s); 873 } 874 875 return res; 876 } 877 878 function axisNumber(obj, coord) { 879 var a = obj[coord + "axis"]; 880 if (typeof a == "object") // if we got a real axis, extract number 881 a = a.n; 882 if (typeof a != "number") 883 a = 1; // default to first axis 884 return a; 885 } 886 887 function allAxes() { 888 // return flat array without annoying null entries 889 return $.grep(xaxes.concat(yaxes), function (a) { return a; }); 890 } 891 892 function canvasToAxisCoords(pos) { 893 // return an object with x/y corresponding to all used axes 894 var res = {}, i, axis; 895 for (i = 0; i < xaxes.length; ++i) { 896 axis = xaxes[i]; 897 if (axis && axis.used) 898 res["x" + axis.n] = axis.c2p(pos.left); 899 } 900 901 for (i = 0; i < yaxes.length; ++i) { 902 axis = yaxes[i]; 903 if (axis && axis.used) 904 res["y" + axis.n] = axis.c2p(pos.top); 905 } 906 907 if (res.x1 !== undefined) 908 res.x = res.x1; 909 if (res.y1 !== undefined) 910 res.y = res.y1; 911 912 return res; 913 } 914 915 function axisToCanvasCoords(pos) { 916 // get canvas coords from the first pair of x/y found in pos 917 var res = {}, i, axis, key; 918 919 for (i = 0; i < xaxes.length; ++i) { 920 axis = xaxes[i]; 921 if (axis && axis.used) { 922 key = "x" + axis.n; 923 if (pos[key] == null && axis.n == 1) 924 key = "x"; 925 926 if (pos[key] != null) { 927 res.left = axis.p2c(pos[key]); 928 break; 929 } 930 } 931 } 932 933 for (i = 0; i < yaxes.length; ++i) { 934 axis = yaxes[i]; 935 if (axis && axis.used) { 936 key = "y" + axis.n; 937 if (pos[key] == null && axis.n == 1) 938 key = "y"; 939 940 if (pos[key] != null) { 941 res.top = axis.p2c(pos[key]); 942 break; 943 } 944 } 945 } 946 947 return res; 948 } 949 950 function getOrCreateAxis(axes, number) { 951 if (!axes[number - 1]) 952 axes[number - 1] = { 953 n: number, // save the number for future reference 954 direction: axes == xaxes ? "x" : "y", 955 options: $.extend(true, {}, axes == xaxes ? options.xaxis : options.yaxis) 956 }; 957 958 return axes[number - 1]; 959 } 960 961 function fillInSeriesOptions() { 962 963 var neededColors = series.length, maxIndex = -1, i; 964 965 // Subtract the number of series that already have fixed colors or 966 // color indexes from the number that we still need to generate. 967 968 for (i = 0; i < series.length; ++i) { 969 var sc = series[i].color; 970 if (sc != null) { 971 neededColors--; 972 if (typeof sc == "number" && sc > maxIndex) { 973 maxIndex = sc; 974 } 975 } 976 } 977 978 // If any of the series have fixed color indexes, then we need to 979 // generate at least as many colors as the highest index. 980 981 if (neededColors <= maxIndex) { 982 neededColors = maxIndex + 1; 983 } 984 985 // Generate all the colors, using first the option colors and then 986 // variations on those colors once they're exhausted. 987 988 var c, colors = [], colorPool = options.colors, 989 colorPoolSize = colorPool.length, variation = 0; 990 991 for (i = 0; i < neededColors; i++) { 992 993 c = $.color.parse(colorPool[i % colorPoolSize] || "#666"); 994 995 // Each time we exhaust the colors in the pool we adjust 996 // a scaling factor used to produce more variations on 997 // those colors. The factor alternates negative/positive 998 // to produce lighter/darker colors. 999 1000 // Reset the variation after every few cycles, or else 1001 // it will end up producing only white or black colors. 1002 1003 if (i % colorPoolSize == 0 && i) { 1004 if (variation >= 0) { 1005 if (variation < 0.5) { 1006 variation = -variation - 0.2; 1007 } else variation = 0; 1008 } else variation = -variation; 1009 } 1010 1011 colors[i] = c.scale('rgb', 1 + variation); 1012 } 1013 1014 // Finalize the series options, filling in their colors 1015 1016 var colori = 0, s; 1017 for (i = 0; i < series.length; ++i) { 1018 s = series[i]; 1019 1020 // assign colors 1021 if (s.color == null) { 1022 s.color = colors[colori].toString(); 1023 ++colori; 1024 } 1025 else if (typeof s.color == "number") 1026 s.color = colors[s.color].toString(); 1027 1028 // turn on lines automatically in case nothing is set 1029 if (s.lines.show == null) { 1030 var v, show = true; 1031 for (v in s) 1032 if (s[v] && s[v].show) { 1033 show = false; 1034 break; 1035 } 1036 if (show) 1037 s.lines.show = true; 1038 } 1039 1040 // If nothing was provided for lines.zero, default it to match 1041 // lines.fill, since areas by default should extend to zero. 1042 1043 if (s.lines.zero == null) { 1044 s.lines.zero = !!s.lines.fill; 1045 } 1046 1047 // setup axes 1048 s.xaxis = getOrCreateAxis(xaxes, axisNumber(s, "x")); 1049 s.yaxis = getOrCreateAxis(yaxes, axisNumber(s, "y")); 1050 } 1051 } 1052 1053 function processData() { 1054 var topSentry = Number.POSITIVE_INFINITY, 1055 bottomSentry = Number.NEGATIVE_INFINITY, 1056 fakeInfinity = Number.MAX_VALUE, 1057 i, j, k, m, length, 1058 s, points, ps, x, y, axis, val, f, p, 1059 data, format; 1060 1061 function updateAxis(axis, min, max) { 1062 if (min < axis.datamin && min != -fakeInfinity) 1063 axis.datamin = min; 1064 if (max > axis.datamax && max != fakeInfinity) 1065 axis.datamax = max; 1066 } 1067 1068 $.each(allAxes(), function (_, axis) { 1069 // init axis 1070 axis.datamin = topSentry; 1071 axis.datamax = bottomSentry; 1072 axis.used = false; 1073 }); 1074 1075 for (i = 0; i < series.length; ++i) { 1076 s = series[i]; 1077 s.datapoints = { points: [] }; 1078 1079 executeHooks(hooks.processRawData, [ s, s.data, s.datapoints ]); 1080 } 1081 1082 // first pass: clean and copy data 1083 for (i = 0; i < series.length; ++i) { 1084 s = series[i]; 1085 1086 data = s.data; 1087 format = s.datapoints.format; 1088 1089 if (!format) { 1090 format = []; 1091 // find out how to copy 1092 format.push({ x: true, number: true, required: true }); 1093 format.push({ y: true, number: true, required: true }); 1094 1095 if (s.bars.show || (s.lines.show && s.lines.fill)) { 1096 var autoscale = !!((s.bars.show && s.bars.zero) || (s.lines.show && s.lines.zero)); 1097 format.push({ y: true, number: true, required: false, defaultValue: 0, autoscale: autoscale }); 1098 if (s.bars.horizontal) { 1099 delete format[format.length - 1].y; 1100 format[format.length - 1].x = true; 1101 } 1102 } 1103 1104 s.datapoints.format = format; 1105 } 1106 1107 if (s.datapoints.pointsize != null) 1108 continue; // already filled in 1109 1110 s.datapoints.pointsize = format.length; 1111 1112 ps = s.datapoints.pointsize; 1113 points = s.datapoints.points; 1114 1115 var insertSteps = s.lines.show && s.lines.steps; 1116 s.xaxis.used = s.yaxis.used = true; 1117 1118 for (j = k = 0; j < data.length; ++j, k += ps) { 1119 p = data[j]; 1120 1121 var nullify = p == null; 1122 if (!nullify) { 1123 for (m = 0; m < ps; ++m) { 1124 val = p[m]; 1125 f = format[m]; 1126 1127 if (f) { 1128 if (f.number && val != null) { 1129 val = +val; // convert to number 1130 if (isNaN(val)) 1131 val = null; 1132 else if (val == Infinity) 1133 val = fakeInfinity; 1134 else if (val == -Infinity) 1135 val = -fakeInfinity; 1136 } 1137 1138 if (val == null) { 1139 if (f.required) 1140 nullify = true; 1141 1142 if (f.defaultValue != null) 1143 val = f.defaultValue; 1144 } 1145 } 1146 1147 points[k + m] = val; 1148 } 1149 } 1150 1151 if (nullify) { 1152 for (m = 0; m < ps; ++m) { 1153 val = points[k + m]; 1154 if (val != null) { 1155 f = format[m]; 1156 // extract min/max info 1157 if (f.autoscale !== false) { 1158 if (f.x) { 1159 updateAxis(s.xaxis, val, val); 1160 } 1161 if (f.y) { 1162 updateAxis(s.yaxis, val, val); 1163 } 1164 } 1165 } 1166 points[k + m] = null; 1167 } 1168 } 1169 else { 1170 // a little bit of line specific stuff that 1171 // perhaps shouldn't be here, but lacking 1172 // better means... 1173 if (insertSteps && k > 0 1174 && points[k - ps] != null 1175 && points[k - ps] != points[k] 1176 && points[k - ps + 1] != points[k + 1]) { 1177 // copy the point to make room for a middle point 1178 for (m = 0; m < ps; ++m) 1179 points[k + ps + m] = points[k + m]; 1180 1181 // middle point has same y 1182 points[k + 1] = points[k - ps + 1]; 1183 1184 // we've added a point, better reflect that 1185 k += ps; 1186 } 1187 } 1188 } 1189 } 1190 1191 // give the hooks a chance to run 1192 for (i = 0; i < series.length; ++i) { 1193 s = series[i]; 1194 1195 executeHooks(hooks.processDatapoints, [ s, s.datapoints]); 1196 } 1197 1198 // second pass: find datamax/datamin for auto-scaling 1199 for (i = 0; i < series.length; ++i) { 1200 s = series[i]; 1201 points = s.datapoints.points; 1202 ps = s.datapoints.pointsize; 1203 format = s.datapoints.format; 1204 1205 var xmin = topSentry, ymin = topSentry, 1206 xmax = bottomSentry, ymax = bottomSentry; 1207 1208 for (j = 0; j < points.length; j += ps) { 1209 if (points[j] == null) 1210 continue; 1211 1212 for (m = 0; m < ps; ++m) { 1213 val = points[j + m]; 1214 f = format[m]; 1215 if (!f || f.autoscale === false || val == fakeInfinity || val == -fakeInfinity) 1216 continue; 1217 1218 if (f.x) { 1219 if (val < xmin) 1220 xmin = val; 1221 if (val > xmax) 1222 xmax = val; 1223 } 1224 if (f.y) { 1225 if (val < ymin) 1226 ymin = val; 1227 if (val > ymax) 1228 ymax = val; 1229 } 1230 } 1231 } 1232 1233 if (s.bars.show) { 1234 // make sure we got room for the bar on the dancing floor 1235 var delta; 1236 1237 switch (s.bars.align) { 1238 case "left": 1239 delta = 0; 1240 break; 1241 case "right": 1242 delta = -s.bars.barWidth; 1243 break; 1244 default: 1245 delta = -s.bars.barWidth / 2; 1246 } 1247 1248 if (s.bars.horizontal) { 1249 ymin += delta; 1250 ymax += delta + s.bars.barWidth; 1251 } 1252 else { 1253 xmin += delta; 1254 xmax += delta + s.bars.barWidth; 1255 } 1256 } 1257 1258 updateAxis(s.xaxis, xmin, xmax); 1259 updateAxis(s.yaxis, ymin, ymax); 1260 } 1261 1262 $.each(allAxes(), function (_, axis) { 1263 if (axis.datamin == topSentry) 1264 axis.datamin = null; 1265 if (axis.datamax == bottomSentry) 1266 axis.datamax = null; 1267 }); 1268 } 1269 1270 function setupCanvases() { 1271 1272 // Make sure the placeholder is clear of everything except canvases 1273 // from a previous plot in this container that we'll try to re-use. 1274 1275 placeholder.css("padding", 0) // padding messes up the positioning 1276 .children().filter(function(){ 1277 return !$(this).hasClass("flot-overlay") && !$(this).hasClass('flot-base'); 1278 }).remove(); 1279 1280 if (placeholder.css("position") == 'static') 1281 placeholder.css("position", "relative"); // for positioning labels and overlay 1282 1283 surface = new Canvas("flot-base", placeholder); 1284 overlay = new Canvas("flot-overlay", placeholder); // overlay canvas for interactive features 1285 1286 ctx = surface.context; 1287 octx = overlay.context; 1288 1289 // define which element we're listening for events on 1290 eventHolder = $(overlay.element).unbind(); 1291 1292 // If we're re-using a plot object, shut down the old one 1293 1294 var existing = placeholder.data("plot"); 1295 1296 if (existing) { 1297 existing.shutdown(); 1298 overlay.clear(); 1299 } 1300 1301 // save in case we get replotted 1302 placeholder.data("plot", plot); 1303 } 1304 1305 function bindEvents() { 1306 // bind events 1307 if (options.grid.hoverable) { 1308 eventHolder.mousemove(onMouseMove); 1309 1310 // Use bind, rather than .mouseleave, because we officially 1311 // still support jQuery 1.2.6, which doesn't define a shortcut 1312 // for mouseenter or mouseleave. This was a bug/oversight that 1313 // was fixed somewhere around 1.3.x. We can return to using 1314 // .mouseleave when we drop support for 1.2.6. 1315 1316 eventHolder.bind("mouseleave", onMouseLeave); 1317 } 1318 1319 if (options.grid.clickable) 1320 eventHolder.click(onClick); 1321 1322 executeHooks(hooks.bindEvents, [eventHolder]); 1323 } 1324 1325 function shutdown() { 1326 if (redrawTimeout) 1327 clearTimeout(redrawTimeout); 1328 1329 eventHolder.unbind("mousemove", onMouseMove); 1330 eventHolder.unbind("mouseleave", onMouseLeave); 1331 eventHolder.unbind("click", onClick); 1332 1333 executeHooks(hooks.shutdown, [eventHolder]); 1334 } 1335 1336 function setTransformationHelpers(axis) { 1337 // set helper functions on the axis, assumes plot area 1338 // has been computed already 1339 1340 function identity(x) { return x; } 1341 1342 var s, m, t = axis.options.transform || identity, 1343 it = axis.options.inverseTransform; 1344 1345 // precompute how much the axis is scaling a point 1346 // in canvas space 1347 if (axis.direction == "x") { 1348 s = axis.scale = plotWidth / Math.abs(t(axis.max) - t(axis.min)); 1349 m = Math.min(t(axis.max), t(axis.min)); 1350 } 1351 else { 1352 s = axis.scale = plotHeight / Math.abs(t(axis.max) - t(axis.min)); 1353 s = -s; 1354 m = Math.max(t(axis.max), t(axis.min)); 1355 } 1356 1357 // data point to canvas coordinate 1358 if (t == identity) // slight optimization 1359 axis.p2c = function (p) { return (p - m) * s; }; 1360 else 1361 axis.p2c = function (p) { return (t(p) - m) * s; }; 1362 // canvas coordinate to data point 1363 if (!it) 1364 axis.c2p = function (c) { return m + c / s; }; 1365 else 1366 axis.c2p = function (c) { return it(m + c / s); }; 1367 } 1368 1369 function measureTickLabels(axis) { 1370 1371 var opts = axis.options, 1372 ticks = axis.ticks || [], 1373 labelWidth = opts.labelWidth || 0, 1374 labelHeight = opts.labelHeight || 0, 1375 maxWidth = labelWidth || (axis.direction == "x" ? Math.floor(surface.width / (ticks.length || 1)) : null), 1376 legacyStyles = axis.direction + "Axis " + axis.direction + axis.n + "Axis", 1377 layer = "flot-" + axis.direction + "-axis flot-" + axis.direction + axis.n + "-axis " + legacyStyles, 1378 font = opts.font || "flot-tick-label tickLabel"; 1379 1380 for (var i = 0; i < ticks.length; ++i) { 1381 1382 var t = ticks[i]; 1383 1384 if (!t.label) 1385 continue; 1386 1387 var info = surface.getTextInfo(layer, t.label, font, null, maxWidth); 1388 1389 labelWidth = Math.max(labelWidth, info.width); 1390 labelHeight = Math.max(labelHeight, info.height); 1391 } 1392 1393 axis.labelWidth = opts.labelWidth || labelWidth; 1394 axis.labelHeight = opts.labelHeight || labelHeight; 1395 } 1396 1397 function allocateAxisBoxFirstPhase(axis) { 1398 // find the bounding box of the axis by looking at label 1399 // widths/heights and ticks, make room by diminishing the 1400 // plotOffset; this first phase only looks at one 1401 // dimension per axis, the other dimension depends on the 1402 // other axes so will have to wait 1403 1404 var lw = axis.labelWidth, 1405 lh = axis.labelHeight, 1406 pos = axis.options.position, 1407 isXAxis = axis.direction === "x", 1408 tickLength = axis.options.tickLength, 1409 axisMargin = options.grid.axisMargin, 1410 padding = options.grid.labelMargin, 1411 innermost = true, 1412 outermost = true, 1413 first = true, 1414 found = false; 1415 1416 // Determine the axis's position in its direction and on its side 1417 1418 $.each(isXAxis ? xaxes : yaxes, function(i, a) { 1419 if (a && a.reserveSpace) { 1420 if (a === axis) { 1421 found = true; 1422 } else if (a.options.position === pos) { 1423 if (found) { 1424 outermost = false; 1425 } else { 1426 innermost = false; 1427 } 1428 } 1429 if (!found) { 1430 first = false; 1431 } 1432 } 1433 }); 1434 1435 // The outermost axis on each side has no margin 1436 1437 if (outermost) { 1438 axisMargin = 0; 1439 } 1440 1441 // The ticks for the first axis in each direction stretch across 1442 1443 if (tickLength == null) { 1444 tickLength = first ? "full" : 5; 1445 } 1446 1447 if (!isNaN(+tickLength)) 1448 padding += +tickLength; 1449 1450 if (isXAxis) { 1451 lh += padding; 1452 1453 if (pos == "bottom") { 1454 plotOffset.bottom += lh + axisMargin; 1455 axis.box = { top: surface.height - plotOffset.bottom, height: lh }; 1456 } 1457 else { 1458 axis.box = { top: plotOffset.top + axisMargin, height: lh }; 1459 plotOffset.top += lh + axisMargin; 1460 } 1461 } 1462 else { 1463 lw += padding; 1464 1465 if (pos == "left") { 1466 axis.box = { left: plotOffset.left + axisMargin, width: lw }; 1467 plotOffset.left += lw + axisMargin; 1468 } 1469 else { 1470 plotOffset.right += lw + axisMargin; 1471 axis.box = { left: surface.width - plotOffset.right, width: lw }; 1472 } 1473 } 1474 1475 // save for future reference 1476 axis.position = pos; 1477 axis.tickLength = tickLength; 1478 axis.box.padding = padding; 1479 axis.innermost = innermost; 1480 } 1481 1482 function allocateAxisBoxSecondPhase(axis) { 1483 // now that all axis boxes have been placed in one 1484 // dimension, we can set the remaining dimension coordinates 1485 if (axis.direction == "x") { 1486 axis.box.left = plotOffset.left - axis.labelWidth / 2; 1487 axis.box.width = surface.width - plotOffset.left - plotOffset.right + axis.labelWidth; 1488 } 1489 else { 1490 axis.box.top = plotOffset.top - axis.labelHeight / 2;
1491 axis.box.height = surface.height - plotOffset.bottom - plotOffset.top + axis.labelHeight; 1492 } 1493 } 1494 1495 function adjustLayoutForThingsStickingOut() { 1496 // possibly adjust plot offset to ensure everything stays 1497 // inside the canvas and isn't clipped off 1498 1499 var minMargin = options.grid.minBorderMargin, 1500 axis, i; 1501 1502 // check stuff from the plot (FIXME: this should just read 1503 // a value from the series, otherwise it's impossible to 1504 // customize) 1505 if (minMargin == null) { 1506 minMargin = 0; 1507 for (i = 0; i < series.length; ++i) 1508 minMargin = Math.max(minMargin, 2 * (series[i].points.radius + series[i].points.lineWidth/2)); 1509 } 1510 1511 var margins = { 1512 left: minMargin, 1513 right: minMargin, 1514 top: minMargin, 1515 bottom: minMargin 1516 }; 1517 1518 // check axis labels, note we don't check the actual 1519 // labels but instead use the overall width/height to not 1520 // jump as much around with replots 1521 $.each(allAxes(), function (_, axis) { 1522 if (axis.reserveSpace && axis.ticks && axis.ticks.length) { 1523 var lastTick = axis.ticks[axis.ticks.length - 1]; 1524 if (axis.direction === "x") { 1525 margins.left = Math.max(margins.left, axis.labelWidth / 2); 1526 if (lastTick.v <= axis.max) { 1527 margins.right = Math.max(margins.right, axis.labelWidth / 2); 1528 } 1529 } else { 1530 margins.bottom = Math.max(margins.bottom, axis.labelHeight / 2); 1531 if (lastTick.v <= axis.max) { 1532 margins.top = Math.max(margins.top, axis.labelHeight / 2); 1533 } 1534 } 1535 } 1536 }); 1537
vendor: 63,340 bytes, lines 1538-3137
1538 plotOffset.left = Math.ceil(Math.max(margins.left, plotOffset.left)); 1539 plotOffset.right = Math.ceil(Math.max(margins.right, plotOffset.right)); 1540 plotOffset.top = Math.ceil(Math.max(margins.top, plotOffset.top)); 1541 plotOffset.bottom = Math.ceil(Math.max(margins.bottom, plotOffset.bottom)); 1542 } 1543 1544 function setupGrid() { 1545 var i, axes = allAxes(), showGrid = options.grid.show; 1546 1547 // Initialize the plot's offset from the edge of the canvas 1548 1549 for (var a in plotOffset) { 1550 var margin = options.grid.margin || 0; 1551 plotOffset[a] = typeof margin == "number" ? margin : margin[a] || 0; 1552 } 1553 1554 executeHooks(hooks.processOffset, [plotOffset]); 1555 1556 // If the grid is visible, add its border width to the offset 1557 1558 for (var a in plotOffset) { 1559 if(typeof(options.grid.borderWidth) == "object") { 1560 plotOffset[a] += showGrid ? options.grid.borderWidth[a] : 0; 1561 } 1562 else { 1563 plotOffset[a] += showGrid ? options.grid.borderWidth : 0; 1564 } 1565 } 1566 1567 // init axes 1568 $.each(axes, function (_, axis) { 1569 axis.show = axis.options.show; 1570 if (axis.show == null) 1571 axis.show = axis.used; // by default an axis is visible if it's got data 1572 1573 axis.reserveSpace = axis.show || axis.options.reserveSpace; 1574 1575 setRange(axis); 1576 }); 1577 1578 if (showGrid) { 1579 1580 var allocatedAxes = $.grep(axes, function (axis) { return axis.reserveSpace; }); 1581 1582 $.each(allocatedAxes, function (_, axis) { 1583 // make the ticks 1584 setupTickGeneration(axis); 1585 setTicks(axis); 1586 snapRangeToTicks(axis, axis.ticks); 1587 // find labelWidth/Height for axis 1588 measureTickLabels(axis); 1589 }); 1590 1591 // with all dimensions calculated, we can compute the 1592 // axis bounding boxes, start from the outside 1593 // (reverse order) 1594 for (i = allocatedAxes.length - 1; i >= 0; --i) 1595 allocateAxisBoxFirstPhase(allocatedAxes[i]); 1596 1597 // make sure we've got enough space for things that 1598 // might stick out 1599 adjustLayoutForThingsStickingOut(); 1600 1601 $.each(allocatedAxes, function (_, axis) { 1602 allocateAxisBoxSecondPhase(axis); 1603 }); 1604 } 1605 1606 plotWidth = surface.width - plotOffset.left - plotOffset.right; 1607 plotHeight = surface.height - plotOffset.bottom - plotOffset.top; 1608 1609 // now we got the proper plot dimensions, we can compute the scaling 1610 $.each(axes, function (_, axis) { 1611 setTransformationHelpers(axis); 1612 }); 1613 1614 if (showGrid) { 1615 drawAxisLabels(); 1616 } 1617 1618 insertLegend(); 1619 } 1620 1621 function setRange(axis) { 1622 var opts = axis.options, 1623 min = +(opts.min != null ? opts.min : axis.datamin), 1624 max = +(opts.max != null ? opts.max : axis.datamax), 1625 delta = max - min; 1626 1627 if (delta == 0.0) { 1628 // degenerate case 1629 var widen = max == 0 ? 1 : 0.01; 1630 1631 if (opts.min == null) 1632 min -= widen; 1633 // always widen max if we couldn't widen min to ensure we 1634 // don't fall into min == max which doesn't work 1635 if (opts.max == null || opts.min != null) 1636 max += widen; 1637 } 1638 else { 1639 // consider autoscaling 1640 var margin = opts.autoscaleMargin; 1641 if (margin != null) { 1642 if (opts.min == null) { 1643 min -= delta * margin; 1644 // make sure we don't go below zero if all values 1645 // are positive 1646 if (min < 0 && axis.datamin != null && axis.datamin >= 0) 1647 min = 0; 1648 } 1649 if (opts.max == null) { 1650 max += delta * margin; 1651 if (max > 0 && axis.datamax != null && axis.datamax <= 0) 1652 max = 0; 1653 } 1654 } 1655 } 1656 axis.min = min; 1657 axis.max = max; 1658 } 1659 1660 function setupTickGeneration(axis) { 1661 var opts = axis.options; 1662 1663 // estimate number of ticks 1664 var noTicks; 1665 if (typeof opts.ticks == "number" && opts.ticks > 0) 1666 noTicks = opts.ticks; 1667 else 1668 // heuristic based on the model a*sqrt(x) fitted to 1669 // some data points that seemed reasonable 1670 noTicks = 0.3 * Math.sqrt(axis.direction == "x" ? surface.width : surface.height); 1671 1672 var delta = (axis.max - axis.min) / noTicks, 1673 dec = -Math.floor(Math.log(delta) / Math.LN10), 1674 maxDec = opts.tickDecimals; 1675 1676 if (maxDec != null && dec > maxDec) { 1677 dec = maxDec; 1678 } 1679 1680 var magn = Math.pow(10, -dec), 1681 norm = delta / magn, // norm is between 1.0 and 10.0 1682 size; 1683 1684 if (norm < 1.5) { 1685 size = 1; 1686 } else if (norm < 3) { 1687 size = 2; 1688 // special case for 2.5, requires an extra decimal 1689 if (norm > 2.25 && (maxDec == null || dec + 1 <= maxDec)) { 1690 size = 2.5; 1691 ++dec; 1692 } 1693 } else if (norm < 7.5) { 1694 size = 5; 1695 } else { 1696 size = 10; 1697 } 1698 1699 size *= magn; 1700 1701 if (opts.minTickSize != null && size < opts.minTickSize) { 1702 size = opts.minTickSize; 1703 } 1704 1705 axis.delta = delta; 1706 axis.tickDecimals = Math.max(0, maxDec != null ? maxDec : dec); 1707 axis.tickSize = opts.tickSize || size; 1708 1709 // Time mode was moved to a plug-in in 0.8, but since so many people use this 1710 // we'll add an especially friendly make sure they remembered to include it. 1711 1712 if (opts.mode == "time" && !axis.tickGenerator) { 1713 throw new Error("Time mode requires the flot.time plugin."); 1714 } 1715 1716 // Flot supports base-10 axes; any other mode else is handled by a plug-in, 1717 // like flot.time.js. 1718 1719 if (!axis.tickGenerator) { 1720 1721 axis.tickGenerator = function (axis) { 1722 1723 var ticks = [], 1724 start = floorInBase(axis.min, axis.tickSize), 1725 i = 0, 1726 v = Number.NaN, 1727 prev; 1728 1729 do { 1730 prev = v; 1731 v = start + i * axis.tickSize; 1732 ticks.push(v); 1733 ++i; 1734 } while (v < axis.max && v != prev); 1735 return ticks; 1736 }; 1737 1738 axis.tickFormatter = function (value, axis) { 1739 1740 var factor = axis.tickDecimals ? Math.pow(10, axis.tickDecimals) : 1; 1741 var formatted = "" + Math.round(value * factor) / factor; 1742 1743 // If tickDecimals was specified, ensure that we have exactly that 1744 // much precision; otherwise default to the value's own precision. 1745 1746 if (axis.tickDecimals != null) { 1747 var decimal = formatted.indexOf("."); 1748 var precision = decimal == -1 ? 0 : formatted.length - decimal - 1; 1749 if (precision < axis.tickDecimals) { 1750 return (precision ? formatted : formatted + ".") + ("" + factor).substr(1, axis.tickDecimals - precision); 1751 } 1752 } 1753 1754 return formatted; 1755 }; 1756 } 1757 1758 if ($.isFunction(opts.tickFormatter)) 1759 axis.tickFormatter = function (v, axis) { return "" + opts.tickFormatter(v, axis); }; 1760 1761 if (opts.alignTicksWithAxis != null) { 1762 var otherAxis = (axis.direction == "x" ? xaxes : yaxes)[opts.alignTicksWithAxis - 1]; 1763 if (otherAxis && otherAxis.used && otherAxis != axis) { 1764 // consider snapping min/max to outermost nice ticks 1765 var niceTicks = axis.tickGenerator(axis); 1766 if (niceTicks.length > 0) { 1767 if (opts.min == null) 1768 axis.min = Math.min(axis.min, niceTicks[0]); 1769 if (opts.max == null && niceTicks.length > 1) 1770 axis.max = Math.max(axis.max, niceTicks[niceTicks.length - 1]); 1771 } 1772 1773 axis.tickGenerator = function (axis) { 1774 // copy ticks, scaled to this axis 1775 var ticks = [], v, i; 1776 for (i = 0; i < otherAxis.ticks.length; ++i) { 1777 v = (otherAxis.ticks[i].v - otherAxis.min) / (otherAxis.max - otherAxis.min); 1778 v = axis.min + v * (axis.max - axis.min); 1779 ticks.push(v); 1780 } 1781 return ticks; 1782 }; 1783 1784 // we might need an extra decimal since forced 1785 // ticks don't necessarily fit naturally 1786 if (!axis.mode && opts.tickDecimals == null) { 1787 var extraDec = Math.max(0, -Math.floor(Math.log(axis.delta) / Math.LN10) + 1), 1788 ts = axis.tickGenerator(axis); 1789 1790 // only proceed if the tick interval rounded 1791 // with an extra decimal doesn't give us a 1792 // zero at end 1793 if (!(ts.length > 1 && /\..*0$/.test((ts[1] - ts[0]).toFixed(extraDec)))) 1794 axis.tickDecimals = extraDec; 1795 } 1796 } 1797 } 1798 } 1799 1800 function setTicks(axis) { 1801 var oticks = axis.options.ticks, ticks = []; 1802 if (oticks == null || (typeof oticks == "number" && oticks > 0)) 1803 ticks = axis.tickGenerator(axis); 1804 else if (oticks) { 1805 if ($.isFunction(oticks)) 1806 // generate the ticks 1807 ticks = oticks(axis); 1808 else 1809 ticks = oticks; 1810 } 1811 1812 // clean up/labelify the supplied ticks, copy them over 1813 var i, v; 1814 axis.ticks = []; 1815 for (i = 0; i < ticks.length; ++i) { 1816 var label = null; 1817 var t = ticks[i]; 1818 if (typeof t == "object") { 1819 v = +t[0]; 1820 if (t.length > 1) 1821 label = t[1]; 1822 } 1823 else 1824 v = +t; 1825 if (label == null) 1826 label = axis.tickFormatter(v, axis); 1827 if (!isNaN(v)) 1828 axis.ticks.push({ v: v, label: label }); 1829 } 1830 } 1831 1832 function snapRangeToTicks(axis, ticks) { 1833 if (axis.options.autoscaleMargin && ticks.length > 0) { 1834 // snap to ticks 1835 if (axis.options.min == null) 1836 axis.min = Math.min(axis.min, ticks[0].v); 1837 if (axis.options.max == null && ticks.length > 1) 1838 axis.max = Math.max(axis.max, ticks[ticks.length - 1].v); 1839 } 1840 } 1841 1842 function draw() { 1843 1844 surface.clear(); 1845 1846 executeHooks(hooks.drawBackground, [ctx]); 1847 1848 var grid = options.grid; 1849 1850 // draw background, if any 1851 if (grid.show && grid.backgroundColor) 1852 drawBackground(); 1853 1854 if (grid.show && !grid.aboveData) { 1855 drawGrid(); 1856 } 1857 1858 for (var i = 0; i < series.length; ++i) { 1859 executeHooks(hooks.drawSeries, [ctx, series[i]]); 1860 drawSeries(series[i]); 1861 } 1862 1863 executeHooks(hooks.draw, [ctx]); 1864 1865 if (grid.show && grid.aboveData) { 1866 drawGrid(); 1867 } 1868 1869 surface.render(); 1870 1871 // A draw implies that either the axes or data have changed, so we 1872 // should probably update the overlay highlights as well. 1873 1874 triggerRedrawOverlay(); 1875 } 1876 1877 function extractRange(ranges, coord) { 1878 var axis, from, to, key, axes = allAxes(); 1879 1880 for (var i = 0; i < axes.length; ++i) { 1881 axis = axes[i]; 1882 if (axis.direction == coord) { 1883 key = coord + axis.n + "axis"; 1884 if (!ranges[key] && axis.n == 1) 1885 key = coord + "axis"; // support x1axis as xaxis 1886 if (ranges[key]) { 1887 from = ranges[key].from; 1888 to = ranges[key].to; 1889 break; 1890 } 1891 } 1892 } 1893 1894 // backwards-compat stuff - to be removed in future 1895 if (!ranges[key]) { 1896 axis = coord == "x" ? xaxes[0] : yaxes[0]; 1897 from = ranges[coord + "1"]; 1898 to = ranges[coord + "2"]; 1899 } 1900 1901 // auto-reverse as an added bonus 1902 if (from != null && to != null && from > to) { 1903 var tmp = from; 1904 from = to; 1905 to = tmp; 1906 } 1907 1908 return { from: from, to: to, axis: axis }; 1909 } 1910 1911 function drawBackground() { 1912 ctx.save(); 1913 ctx.translate(plotOffset.left, plotOffset.top); 1914 1915 ctx.fillStyle = getColorOrGradient(options.grid.backgroundColor, plotHeight, 0, "rgba(255, 255, 255, 0)"); 1916 ctx.fillRect(0, 0, plotWidth, plotHeight); 1917 ctx.restore(); 1918 } 1919 1920 function drawGrid() { 1921 var i, axes, bw, bc; 1922 1923 ctx.save(); 1924 ctx.translate(plotOffset.left, plotOffset.top); 1925 1926 // draw markings 1927 var markings = options.grid.markings; 1928 if (markings) { 1929 if ($.isFunction(markings)) { 1930 axes = plot.getAxes(); 1931 // xmin etc. is backwards compatibility, to be 1932 // removed in the future 1933 axes.xmin = axes.xaxis.min; 1934 axes.xmax = axes.xaxis.max; 1935 axes.ymin = axes.yaxis.min; 1936 axes.ymax = axes.yaxis.max; 1937 1938 markings = markings(axes); 1939 } 1940 1941 for (i = 0; i < markings.length; ++i) { 1942 var m = markings[i], 1943 xrange = extractRange(m, "x"), 1944 yrange = extractRange(m, "y"); 1945 1946 // fill in missing 1947 if (xrange.from == null) 1948 xrange.from = xrange.axis.min; 1949 if (xrange.to == null) 1950 xrange.to = xrange.axis.max; 1951 if (yrange.from == null) 1952 yrange.from = yrange.axis.min; 1953 if (yrange.to == null) 1954 yrange.to = yrange.axis.max; 1955 1956 // clip 1957 if (xrange.to < xrange.axis.min || xrange.from > xrange.axis.max || 1958 yrange.to < yrange.axis.min || yrange.from > yrange.axis.max) 1959 continue; 1960 1961 xrange.from = Math.max(xrange.from, xrange.axis.min); 1962 xrange.to = Math.min(xrange.to, xrange.axis.max); 1963 yrange.from = Math.max(yrange.from, yrange.axis.min); 1964 yrange.to = Math.min(yrange.to, yrange.axis.max); 1965 1966 if (xrange.from == xrange.to && yrange.from == yrange.to) 1967 continue; 1968 1969 // then draw 1970 xrange.from = xrange.axis.p2c(xrange.from); 1971 xrange.to = xrange.axis.p2c(xrange.to); 1972 yrange.from = yrange.axis.p2c(yrange.from); 1973 yrange.to = yrange.axis.p2c(yrange.to); 1974 1975 if (xrange.from == xrange.to || yrange.from == yrange.to) { 1976 // draw line 1977 ctx.beginPath(); 1978 ctx.strokeStyle = m.color || options.grid.markingsColor; 1979 ctx.lineWidth = m.lineWidth || options.grid.markingsLineWidth; 1980 ctx.moveTo(xrange.from, yrange.from); 1981 ctx.lineTo(xrange.to, yrange.to); 1982 ctx.stroke(); 1983 } 1984 else { 1985 // fill area 1986 ctx.fillStyle = m.color || options.grid.markingsColor; 1987 ctx.fillRect(xrange.from, yrange.to, 1988 xrange.to - xrange.from, 1989 yrange.from - yrange.to); 1990 } 1991 } 1992 } 1993 1994 // draw the ticks 1995 axes = allAxes(); 1996 bw = options.grid.borderWidth; 1997 1998 for (var j = 0; j < axes.length; ++j) { 1999 var axis = axes[j], box = axis.box, 2000 t = axis.tickLength, x, y, xoff, yoff; 2001 if (!axis.show || axis.ticks.length == 0) 2002 continue; 2003 2004 ctx.lineWidth = 1; 2005 2006 // find the edges 2007 if (axis.direction == "x") { 2008 x = 0; 2009 if (t == "full") 2010 y = (axis.position == "top" ? 0 : plotHeight); 2011 else 2012 y = box.top - plotOffset.top + (axis.position == "top" ? box.height : 0); 2013 } 2014 else { 2015 y = 0; 2016 if (t == "full") 2017 x = (axis.position == "left" ? 0 : plotWidth); 2018 else 2019 x = box.left - plotOffset.left + (axis.position == "left" ? box.width : 0); 2020 } 2021 2022 // draw tick bar 2023 if (!axis.innermost) { 2024 ctx.strokeStyle = axis.options.color; 2025 ctx.beginPath(); 2026 xoff = yoff = 0; 2027 if (axis.direction == "x") 2028 xoff = plotWidth + 1; 2029 else 2030 yoff = plotHeight + 1; 2031 2032 if (ctx.lineWidth == 1) { 2033 if (axis.direction == "x") { 2034 y = Math.floor(y) + 0.5; 2035 } else { 2036 x = Math.floor(x) + 0.5; 2037 } 2038 } 2039 2040 ctx.moveTo(x, y); 2041 ctx.lineTo(x + xoff, y + yoff); 2042 ctx.stroke(); 2043 } 2044 2045 // draw ticks 2046 2047 ctx.strokeStyle = axis.options.tickColor; 2048 2049 ctx.beginPath(); 2050 for (i = 0; i < axis.ticks.length; ++i) { 2051 var v = axis.ticks[i].v; 2052 2053 xoff = yoff = 0; 2054 2055 if (isNaN(v) || v < axis.min || v > axis.max 2056 // skip those lying on the axes if we got a border 2057 || (t == "full" 2058 && ((typeof bw == "object" && bw[axis.position] > 0) || bw > 0) 2059 && (v == axis.min || v == axis.max))) 2060 continue; 2061 2062 if (axis.direction == "x") { 2063 x = axis.p2c(v); 2064 yoff = t == "full" ? -plotHeight : t; 2065 2066 if (axis.position == "top") 2067 yoff = -yoff; 2068 } 2069 else { 2070 y = axis.p2c(v); 2071 xoff = t == "full" ? -plotWidth : t; 2072 2073 if (axis.position == "left") 2074 xoff = -xoff; 2075 } 2076 2077 if (ctx.lineWidth == 1) { 2078 if (axis.direction == "x") 2079 x = Math.floor(x) + 0.5; 2080 else 2081 y = Math.floor(y) + 0.5; 2082 } 2083 2084 ctx.moveTo(x, y); 2085 ctx.lineTo(x + xoff, y + yoff); 2086 } 2087 2088 ctx.stroke(); 2089 } 2090 2091 2092 // draw border 2093 if (bw) { 2094 // If either borderWidth or borderColor is an object, then draw the border 2095 // line by line instead of as one rectangle 2096 bc = options.grid.borderColor; 2097 if(typeof bw == "object" || typeof bc == "object") { 2098 if (typeof bw !== "object") { 2099 bw = {top: bw, right: bw, bottom: bw, left: bw}; 2100 } 2101 if (typeof bc !== "object") { 2102 bc = {top: bc, right: bc, bottom: bc, left: bc}; 2103 } 2104 2105 if (bw.top > 0) { 2106 ctx.strokeStyle = bc.top; 2107 ctx.lineWidth = bw.top; 2108 ctx.beginPath(); 2109 ctx.moveTo(0 - bw.left, 0 - bw.top/2); 2110 ctx.lineTo(plotWidth, 0 - bw.top/2); 2111 ctx.stroke(); 2112 } 2113 2114 if (bw.right > 0) { 2115 ctx.strokeStyle = bc.right; 2116 ctx.lineWidth = bw.right; 2117 ctx.beginPath(); 2118 ctx.moveTo(plotWidth + bw.right / 2, 0 - bw.top); 2119 ctx.lineTo(plotWidth + bw.right / 2, plotHeight); 2120 ctx.stroke(); 2121 } 2122 2123 if (bw.bottom > 0) { 2124 ctx.strokeStyle = bc.bottom; 2125 ctx.lineWidth = bw.bottom; 2126 ctx.beginPath(); 2127 ctx.moveTo(plotWidth + bw.right, plotHeight + bw.bottom / 2); 2128 ctx.lineTo(0, plotHeight + bw.bottom / 2); 2129 ctx.stroke(); 2130 } 2131 2132 if (bw.left > 0) { 2133 ctx.strokeStyle = bc.left; 2134 ctx.lineWidth = bw.left; 2135 ctx.beginPath(); 2136 ctx.moveTo(0 - bw.left/2, plotHeight + bw.bottom); 2137 ctx.lineTo(0- bw.left/2, 0); 2138 ctx.stroke(); 2139 } 2140 } 2141 else { 2142 ctx.lineWidth = bw; 2143 ctx.strokeStyle = options.grid.borderColor; 2144 ctx.strokeRect(-bw/2, -bw/2, plotWidth + bw, plotHeight + bw); 2145 } 2146 } 2147 2148 ctx.restore(); 2149 } 2150 2151 function drawAxisLabels() { 2152 2153 $.each(allAxes(), function (_, axis) { 2154 var box = axis.box, 2155 legacyStyles = axis.direction + "Axis " + axis.direction + axis.n + "Axis", 2156 layer = "flot-" + axis.direction + "-axis flot-" + axis.direction + axis.n + "-axis " + legacyStyles, 2157 font = axis.options.font || "flot-tick-label tickLabel", 2158 tick, x, y, halign, valign; 2159 2160 // Remove text before checking for axis.show and ticks.length; 2161 // otherwise plugins, like flot-tickrotor, that draw their own 2162 // tick labels will end up with both theirs and the defaults. 2163 2164 surface.removeText(layer); 2165 2166 if (!axis.show || axis.ticks.length == 0) 2167 return; 2168 2169 for (var i = 0; i < axis.ticks.length; ++i) { 2170 2171 tick = axis.ticks[i]; 2172 if (!tick.label || tick.v < axis.min || tick.v > axis.max) 2173 continue; 2174 2175 if (axis.direction == "x") { 2176 halign = "center"; 2177 x = plotOffset.left + axis.p2c(tick.v); 2178 if (axis.position == "bottom") { 2179 y = box.top + box.padding; 2180 } else { 2181 y = box.top + box.height - box.padding; 2182 valign = "bottom"; 2183 } 2184 } else { 2185 valign = "middle"; 2186 y = plotOffset.top + axis.p2c(tick.v); 2187 if (axis.position == "left") { 2188 x = box.left + box.width - box.padding; 2189 halign = "right"; 2190 } else { 2191 x = box.left + box.padding; 2192 } 2193 } 2194 2195 surface.addText(layer, x, y, tick.label, font, null, null, halign, valign); 2196 } 2197 }); 2198 } 2199 2200 function drawSeries(series) { 2201 if (series.lines.show) 2202 drawSeriesLines(series); 2203 if (series.bars.show) 2204 drawSeriesBars(series); 2205 if (series.points.show) 2206 drawSeriesPoints(series); 2207 } 2208 2209 function drawSeriesLines(series) { 2210 function plotLine(datapoints, xoffset, yoffset, axisx, axisy) { 2211 var points = datapoints.points, 2212 ps = datapoints.pointsize, 2213 prevx = null, prevy = null; 2214 2215 ctx.beginPath(); 2216 for (var i = ps; i < points.length; i += ps) { 2217 var x1 = points[i - ps], y1 = points[i - ps + 1], 2218 x2 = points[i], y2 = points[i + 1]; 2219 2220 if (x1 == null || x2 == null) 2221 continue; 2222 2223 // clip with ymin 2224 if (y1 <= y2 && y1 < axisy.min) { 2225 if (y2 < axisy.min) 2226 continue; // line segment is outside 2227 // compute new intersection point 2228 x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1; 2229 y1 = axisy.min; 2230 } 2231 else if (y2 <= y1 && y2 < axisy.min) { 2232 if (y1 < axisy.min) 2233 continue; 2234 x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1; 2235 y2 = axisy.min; 2236 } 2237 2238 // clip with ymax 2239 if (y1 >= y2 && y1 > axisy.max) { 2240 if (y2 > axisy.max) 2241 continue; 2242 x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1; 2243 y1 = axisy.max; 2244 } 2245 else if (y2 >= y1 && y2 > axisy.max) { 2246 if (y1 > axisy.max) 2247 continue; 2248 x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1; 2249 y2 = axisy.max; 2250 } 2251 2252 // clip with xmin 2253 if (x1 <= x2 && x1 < axisx.min) { 2254 if (x2 < axisx.min) 2255 continue; 2256 y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1; 2257 x1 = axisx.min; 2258 } 2259 else if (x2 <= x1 && x2 < axisx.min) { 2260 if (x1 < axisx.min) 2261 continue; 2262 y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1; 2263 x2 = axisx.min; 2264 } 2265 2266 // clip with xmax 2267 if (x1 >= x2 && x1 > axisx.max) { 2268 if (x2 > axisx.max) 2269 continue; 2270 y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1; 2271 x1 = axisx.max; 2272 } 2273 else if (x2 >= x1 && x2 > axisx.max) { 2274 if (x1 > axisx.max) 2275 continue; 2276 y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1; 2277 x2 = axisx.max; 2278 } 2279 2280 if (x1 != prevx || y1 != prevy) 2281 ctx.moveTo(axisx.p2c(x1) + xoffset, axisy.p2c(y1) + yoffset); 2282 2283 prevx = x2; 2284 prevy = y2; 2285 ctx.lineTo(axisx.p2c(x2) + xoffset, axisy.p2c(y2) + yoffset); 2286 } 2287 ctx.stroke(); 2288 } 2289 2290 function plotLineArea(datapoints, axisx, axisy) { 2291 var points = datapoints.points, 2292 ps = datapoints.pointsize, 2293 bottom = Math.min(Math.max(0, axisy.min), axisy.max), 2294 i = 0, top, areaOpen = false, 2295 ypos = 1, segmentStart = 0, segmentEnd = 0; 2296 2297 // we process each segment in two turns, first forward 2298 // direction to sketch out top, then once we hit the 2299 // end we go backwards to sketch the bottom 2300 while (true) { 2301 if (ps > 0 && i > points.length + ps) 2302 break; 2303 2304 i += ps; // ps is negative if going backwards 2305 2306 var x1 = points[i - ps], 2307 y1 = points[i - ps + ypos], 2308 x2 = points[i], y2 = points[i + ypos]; 2309 2310 if (areaOpen) { 2311 if (ps > 0 && x1 != null && x2 == null) { 2312 // at turning point 2313 segmentEnd = i; 2314 ps = -ps; 2315 ypos = 2; 2316 continue; 2317 } 2318 2319 if (ps < 0 && i == segmentStart + ps) { 2320 // done with the reverse sweep 2321 ctx.fill(); 2322 areaOpen = false; 2323 ps = -ps; 2324 ypos = 1; 2325 i = segmentStart = segmentEnd + ps; 2326 continue; 2327 } 2328 } 2329 2330 if (x1 == null || x2 == null) 2331 continue; 2332 2333 // clip x values 2334 2335 // clip with xmin 2336 if (x1 <= x2 && x1 < axisx.min) { 2337 if (x2 < axisx.min) 2338 continue; 2339 y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1; 2340 x1 = axisx.min; 2341 } 2342 else if (x2 <= x1 && x2 < axisx.min) { 2343 if (x1 < axisx.min) 2344 continue; 2345 y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1; 2346 x2 = axisx.min; 2347 } 2348 2349 // clip with xmax 2350 if (x1 >= x2 && x1 > axisx.max) { 2351 if (x2 > axisx.max) 2352 continue; 2353 y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1; 2354 x1 = axisx.max; 2355 } 2356 else if (x2 >= x1 && x2 > axisx.max) { 2357 if (x1 > axisx.max) 2358 continue; 2359 y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1; 2360 x2 = axisx.max; 2361 } 2362 2363 if (!areaOpen) { 2364 // open area 2365 ctx.beginPath(); 2366 ctx.moveTo(axisx.p2c(x1), axisy.p2c(bottom)); 2367 areaOpen = true; 2368 } 2369 2370 // now first check the case where both is outside 2371 if (y1 >= axisy.max && y2 >= axisy.max) { 2372 ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.max)); 2373 ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.max)); 2374 continue; 2375 } 2376 else if (y1 <= axisy.min && y2 <= axisy.min) { 2377 ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.min)); 2378 ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.min)); 2379 continue; 2380 } 2381 2382 // else it's a bit more complicated, there might 2383 // be a flat maxed out rectangle first, then a 2384 // triangular cutout or reverse; to find these 2385 // keep track of the current x values 2386 var x1old = x1, x2old = x2; 2387 2388 // clip the y values, without shortcutting, we 2389 // go through all cases in turn 2390 2391 // clip with ymin 2392 if (y1 <= y2 && y1 < axisy.min && y2 >= axisy.min) { 2393 x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1; 2394 y1 = axisy.min; 2395 } 2396 else if (y2 <= y1 && y2 < axisy.min && y1 >= axisy.min) { 2397 x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1; 2398 y2 = axisy.min; 2399 } 2400 2401 // clip with ymax 2402 if (y1 >= y2 && y1 > axisy.max && y2 <= axisy.max) { 2403 x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1; 2404 y1 = axisy.max; 2405 } 2406 else if (y2 >= y1 && y2 > axisy.max && y1 <= axisy.max) { 2407 x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1; 2408 y2 = axisy.max; 2409 } 2410 2411 // if the x value was changed we got a rectangle 2412 // to fill 2413 if (x1 != x1old) { 2414 ctx.lineTo(axisx.p2c(x1old), axisy.p2c(y1)); 2415 // it goes to (x1, y1), but we fill that below 2416 } 2417 2418 // fill triangular section, this sometimes result 2419 // in redundant points if (x1, y1) hasn't changed 2420 // from previous line to, but we just ignore that 2421 ctx.lineTo(axisx.p2c(x1), axisy.p2c(y1)); 2422 ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2)); 2423 2424 // fill the other rectangle if it's there 2425 if (x2 != x2old) { 2426 ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2)); 2427 ctx.lineTo(axisx.p2c(x2old), axisy.p2c(y2)); 2428 } 2429 } 2430 } 2431 2432 ctx.save(); 2433 ctx.translate(plotOffset.left, plotOffset.top); 2434 ctx.lineJoin = "round"; 2435 2436 var lw = series.lines.lineWidth, 2437 sw = series.shadowSize; 2438 // FIXME: consider another form of shadow when filling is turned on 2439 if (lw > 0 && sw > 0) { 2440 // draw shadow as a thick and thin line with transparency 2441 ctx.lineWidth = sw; 2442 ctx.strokeStyle = "rgba(0,0,0,0.1)"; 2443 // position shadow at angle from the mid of line 2444 var angle = Math.PI/18; 2445 plotLine(series.datapoints, Math.sin(angle) * (lw/2 + sw/2), Math.cos(angle) * (lw/2 + sw/2), series.xaxis, series.yaxis); 2446 ctx.lineWidth = sw/2; 2447 plotLine(series.datapoints, Math.sin(angle) * (lw/2 + sw/4), Math.cos(angle) * (lw/2 + sw/4), series.xaxis, series.yaxis); 2448 } 2449 2450 ctx.lineWidth = lw; 2451 ctx.strokeStyle = series.color; 2452 var fillStyle = getFillStyle(series.lines, series.color, 0, plotHeight); 2453 if (fillStyle) { 2454 ctx.fillStyle = fillStyle; 2455 plotLineArea(series.datapoints, series.xaxis, series.yaxis); 2456 } 2457 2458 if (lw > 0) 2459 plotLine(series.datapoints, 0, 0, series.xaxis, series.yaxis); 2460 ctx.restore(); 2461 } 2462 2463 function drawSeriesPoints(series) { 2464 function plotPoints(datapoints, radius, fillStyle, offset, shadow, axisx, axisy, symbol) { 2465 var points = datapoints.points, ps = datapoints.pointsize; 2466 2467 for (var i = 0; i < points.length; i += ps) { 2468 var x = points[i], y = points[i + 1]; 2469 if (x == null || x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max) 2470 continue; 2471 2472 ctx.beginPath(); 2473 x = axisx.p2c(x); 2474 y = axisy.p2c(y) + offset; 2475 if (symbol == "circle") 2476 ctx.arc(x, y, radius, 0, shadow ? Math.PI : Math.PI * 2, false); 2477 else 2478 symbol(ctx, x, y, radius, shadow); 2479 ctx.closePath(); 2480 2481 if (fillStyle) { 2482 ctx.fillStyle = fillStyle; 2483 ctx.fill(); 2484 } 2485 ctx.stroke(); 2486 } 2487 } 2488 2489 ctx.save(); 2490 ctx.translate(plotOffset.left, plotOffset.top); 2491 2492 var lw = series.points.lineWidth, 2493 sw = series.shadowSize, 2494 radius = series.points.radius, 2495 symbol = series.points.symbol; 2496 2497 // If the user sets the line width to 0, we change it to a very 2498 // small value. A line width of 0 seems to force the default of 1. 2499 // Doing the conditional here allows the shadow setting to still be 2500 // optional even with a lineWidth of 0. 2501 2502 if( lw == 0 ) 2503 lw = 0.0001; 2504 2505 if (lw > 0 && sw > 0) { 2506 // draw shadow in two steps 2507 var w = sw / 2; 2508 ctx.lineWidth = w; 2509 ctx.strokeStyle = "rgba(0,0,0,0.1)"; 2510 plotPoints(series.datapoints, radius, null, w + w/2, true, 2511 series.xaxis, series.yaxis, symbol); 2512 2513 ctx.strokeStyle = "rgba(0,0,0,0.2)"; 2514 plotPoints(series.datapoints, radius, null, w/2, true, 2515 series.xaxis, series.yaxis, symbol); 2516 } 2517 2518 ctx.lineWidth = lw; 2519 ctx.strokeStyle = series.color; 2520 plotPoints(series.datapoints, radius, 2521 getFillStyle(series.points, series.color), 0, false, 2522 series.xaxis, series.yaxis, symbol); 2523 ctx.restore(); 2524 } 2525 2526 function drawBar(x, y, b, barLeft, barRight, fillStyleCallback, axisx, axisy, c, horizontal, lineWidth) { 2527 var left, right, bottom, top, 2528 drawLeft, drawRight, drawTop, drawBottom, 2529 tmp; 2530 2531 // in horizontal mode, we start the bar from the left 2532 // instead of from the bottom so it appears to be 2533 // horizontal rather than vertical 2534 if (horizontal) { 2535 drawBottom = drawRight = drawTop = true; 2536 drawLeft = false; 2537 left = b; 2538 right = x; 2539 top = y + barLeft; 2540 bottom = y + barRight; 2541 2542 // account for negative bars 2543 if (right < left) { 2544 tmp = right; 2545 right = left; 2546 left = tmp; 2547 drawLeft = true; 2548 drawRight = false; 2549 } 2550 } 2551 else { 2552 drawLeft = drawRight = drawTop = true; 2553 drawBottom = false; 2554 left = x + barLeft; 2555 right = x + barRight; 2556 bottom = b; 2557 top = y; 2558 2559 // account for negative bars 2560 if (top < bottom) { 2561 tmp = top; 2562 top = bottom; 2563 bottom = tmp; 2564 drawBottom = true; 2565 drawTop = false; 2566 } 2567 } 2568 2569 // clip 2570 if (right < axisx.min || left > axisx.max || 2571 top < axisy.min || bottom > axisy.max) 2572 return; 2573 2574 if (left < axisx.min) { 2575 left = axisx.min; 2576 drawLeft = false; 2577 } 2578 2579 if (right > axisx.max) { 2580 right = axisx.max; 2581 drawRight = false; 2582 } 2583 2584 if (bottom < axisy.min) { 2585 bottom = axisy.min; 2586 drawBottom = false; 2587 } 2588 2589 if (top > axisy.max) { 2590 top = axisy.max; 2591 drawTop = false; 2592 } 2593 2594 left = axisx.p2c(left); 2595 bottom = axisy.p2c(bottom); 2596 right = axisx.p2c(right); 2597 top = axisy.p2c(top); 2598 2599 // fill the bar 2600 if (fillStyleCallback) { 2601 c.fillStyle = fillStyleCallback(bottom, top); 2602 c.fillRect(left, top, right - left, bottom - top) 2603 } 2604 2605 // draw outline 2606 if (lineWidth > 0 && (drawLeft || drawRight || drawTop || drawBottom)) { 2607 c.beginPath(); 2608 2609 // FIXME: inline moveTo is buggy with excanvas 2610 c.moveTo(left, bottom); 2611 if (drawLeft) 2612 c.lineTo(left, top); 2613 else 2614 c.moveTo(left, top); 2615 if (drawTop) 2616 c.lineTo(right, top); 2617 else 2618 c.moveTo(right, top); 2619 if (drawRight) 2620 c.lineTo(right, bottom); 2621 else 2622 c.moveTo(right, bottom); 2623 if (drawBottom) 2624 c.lineTo(left, bottom); 2625 else 2626 c.moveTo(left, bottom); 2627 c.stroke(); 2628 } 2629 } 2630 2631 function drawSeriesBars(series) { 2632 function plotBars(datapoints, barLeft, barRight, fillStyleCallback, axisx, axisy) { 2633 var points = datapoints.points, ps = datapoints.pointsize; 2634 2635 for (var i = 0; i < points.length; i += ps) { 2636 if (points[i] == null) 2637 continue; 2638 drawBar(points[i], points[i + 1], points[i + 2], barLeft, barRight, fillStyleCallback, axisx, axisy, ctx, series.bars.horizontal, series.bars.lineWidth); 2639 } 2640 } 2641 2642 ctx.save(); 2643 ctx.translate(plotOffset.left, plotOffset.top); 2644 2645 // FIXME: figure out a way to add shadows (for instance along the right edge) 2646 ctx.lineWidth = series.bars.lineWidth; 2647 ctx.strokeStyle = series.color; 2648 2649 var barLeft; 2650 2651 switch (series.bars.align) { 2652 case "left": 2653 barLeft = 0; 2654 break; 2655 case "right": 2656 barLeft = -series.bars.barWidth; 2657 break; 2658 default: 2659 barLeft = -series.bars.barWidth / 2; 2660 } 2661 2662 var fillStyleCallback = series.bars.fill ? function (bottom, top) { return getFillStyle(series.bars, series.color, bottom, top); } : null; 2663 plotBars(series.datapoints, barLeft, barLeft + series.bars.barWidth, fillStyleCallback, series.xaxis, series.yaxis); 2664 ctx.restore(); 2665 } 2666 2667 function getFillStyle(filloptions, seriesColor, bottom, top) { 2668 var fill = filloptions.fill; 2669 if (!fill) 2670 return null; 2671 2672 if (filloptions.fillColor) 2673 return getColorOrGradient(filloptions.fillColor, bottom, top, seriesColor); 2674 2675 var c = $.color.parse(seriesColor); 2676 c.a = typeof fill == "number" ? fill : 0.4; 2677 c.normalize(); 2678 return c.toString(); 2679 } 2680 2681 function insertLegend() { 2682 2683 if (options.legend.container != null) { 2684 $(options.legend.container).html(""); 2685 } else { 2686 placeholder.find(".legend").remove(); 2687 } 2688 2689 if (!options.legend.show) { 2690 return; 2691 } 2692 2693 var fragments = [], entries = [], rowStarted = false, 2694 lf = options.legend.labelFormatter, s, label; 2695 2696 // Build a list of legend entries, with each having a label and a color 2697 2698 for (var i = 0; i < series.length; ++i) { 2699 s = series[i]; 2700 if (s.label) { 2701 label = lf ? lf(s.label, s) : s.label; 2702 if (label) { 2703 entries.push({ 2704 label: label, 2705 color: s.color 2706 }); 2707 } 2708 } 2709 } 2710 2711 // Sort the legend using either the default or a custom comparator 2712 2713 if (options.legend.sorted) { 2714 if ($.isFunction(options.legend.sorted)) { 2715 entries.sort(options.legend.sorted); 2716 } else if (options.legend.sorted == "reverse") { 2717 entries.reverse(); 2718 } else { 2719 var ascending = options.legend.sorted != "descending"; 2720 entries.sort(function(a, b) { 2721 return a.label == b.label ? 0 : ( 2722 (a.label < b.label) != ascending ? 1 : -1 // Logical XOR 2723 ); 2724 }); 2725 } 2726 } 2727 2728 // Generate markup for the list of entries, in their final order 2729 2730 for (var i = 0; i < entries.length; ++i) { 2731 2732 var entry = entries[i]; 2733 2734 if (i % options.legend.noColumns == 0) { 2735 if (rowStarted) 2736 fragments.push('</tr>'); 2737 fragments.push('<tr>'); 2738 rowStarted = true; 2739 } 2740 2741 fragments.push( 2742 '<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>' + 2743 '<td class="legendLabel">' + entry.label + '</td>' 2744 ); 2745 } 2746 2747 if (rowStarted) 2748 fragments.push('</tr>'); 2749 2750 if (fragments.length == 0) 2751 return; 2752 2753 var table = '<table style="font-size:smaller;color:' + options.grid.color + '">' + fragments.join("") + '</table>'; 2754 if (options.legend.container != null) 2755 $(options.legend.container).html(table); 2756 else { 2757 var pos = "", 2758 p = options.legend.position, 2759 m = options.legend.margin; 2760 if (m[0] == null) 2761 m = [m, m]; 2762 if (p.charAt(0) == "n") 2763 pos += 'top:' + (m[1] + plotOffset.top) + 'px;'; 2764 else if (p.charAt(0) == "s") 2765 pos += 'bottom:' + (m[1] + plotOffset.bottom) + 'px;'; 2766 if (p.charAt(1) == "e") 2767 pos += 'right:' + (m[0] + plotOffset.right) + 'px;'; 2768 else if (p.charAt(1) == "w") 2769 pos += 'left:' + (m[0] + plotOffset.left) + 'px;'; 2770 var legend = $('<div class="legend">' + table.replace('style="', 'style="position:absolute;' + pos +';') + '</div>').appendTo(placeholder); 2771 if (options.legend.backgroundOpacity != 0.0) { 2772 // put in the transparent background 2773 // separately to avoid blended labels and 2774 // label boxes 2775 var c = options.legend.backgroundColor; 2776 if (c == null) { 2777 c = options.grid.backgroundColor; 2778 if (c && typeof c == "string") 2779 c = $.color.parse(c); 2780 else 2781 c = $.color.extract(legend, 'background-color'); 2782 c.a = 1; 2783 c = c.toString(); 2784 } 2785 var div = legend.children(); 2786 $('<div style="position:absolute;width:' + div.width() + 'px;height:' + div.height() + 'px;' + pos +'background-color:' + c + ';"> </div>').prependTo(legend).css('opacity', options.legend.backgroundOpacity); 2787 } 2788 } 2789 } 2790 2791 2792 // interactive features 2793 2794 var highlights = [], 2795 redrawTimeout = null; 2796 2797 // returns the data item the mouse is over, or null if none is found 2798 function findNearbyItem(mouseX, mouseY, seriesFilter) { 2799 var maxDistance = options.grid.mouseActiveRadius, 2800 smallestDistance = maxDistance * maxDistance + 1, 2801 item = null, foundPoint = false, i, j, ps; 2802 2803 for (i = series.length - 1; i >= 0; --i) { 2804 if (!seriesFilter(series[i])) 2805 continue; 2806 2807 var s = series[i], 2808 axisx = s.xaxis, 2809 axisy = s.yaxis, 2810 points = s.datapoints.points, 2811 mx = axisx.c2p(mouseX), // precompute some stuff to make the loop faster 2812 my = axisy.c2p(mouseY), 2813 maxx = maxDistance / axisx.scale, 2814 maxy = maxDistance / axisy.scale; 2815 2816 ps = s.datapoints.pointsize; 2817 // with inverse transforms, we can't use the maxx/maxy 2818 // optimization, sadly 2819 if (axisx.options.inverseTransform) 2820 maxx = Number.MAX_VALUE; 2821 if (axisy.options.inverseTransform) 2822 maxy = Number.MAX_VALUE; 2823 2824 if (s.lines.show || s.points.show) { 2825 for (j = 0; j < points.length; j += ps) { 2826 var x = points[j], y = points[j + 1]; 2827 if (x == null) 2828 continue; 2829 2830 // For points and lines, the cursor must be within a 2831 // certain distance to the data point 2832 if (x - mx > maxx || x - mx < -maxx || 2833 y - my > maxy || y - my < -maxy) 2834 continue; 2835 2836 // We have to calculate distances in pixels, not in 2837 // data units, because the scales of the axes may be different 2838 var dx = Math.abs(axisx.p2c(x) - mouseX), 2839 dy = Math.abs(axisy.p2c(y) - mouseY), 2840 dist = dx * dx + dy * dy; // we save the sqrt 2841 2842 // use <= to ensure last point takes precedence 2843 // (last generally means on top of) 2844 if (dist < smallestDistance) { 2845 smallestDistance = dist; 2846 item = [i, j / ps]; 2847 } 2848 } 2849 } 2850 2851 if (s.bars.show && !item) { // no other point can be nearby 2852 2853 var barLeft, barRight; 2854 2855 switch (s.bars.align) { 2856 case "left": 2857 barLeft = 0; 2858 break; 2859 case "right": 2860 barLeft = -s.bars.barWidth; 2861 break; 2862 default: 2863 barLeft = -s.bars.barWidth / 2; 2864 } 2865 2866 barRight = barLeft + s.bars.barWidth; 2867 2868 for (j = 0; j < points.length; j += ps) { 2869 var x = points[j], y = points[j + 1], b = points[j + 2]; 2870 if (x == null) 2871 continue; 2872 2873 // for a bar graph, the cursor must be inside the bar 2874 if (series[i].bars.horizontal ? 2875 (mx <= Math.max(b, x) && mx >= Math.min(b, x) && 2876 my >= y + barLeft && my <= y + barRight) : 2877 (mx >= x + barLeft && mx <= x + barRight && 2878 my >= Math.min(b, y) && my <= Math.max(b, y))) 2879 item = [i, j / ps]; 2880 } 2881 } 2882 } 2883 2884 if (item) { 2885 i = item[0]; 2886 j = item[1]; 2887 ps = series[i].datapoints.pointsize; 2888 2889 return { datapoint: series[i].datapoints.points.slice(j * ps, (j + 1) * ps), 2890 dataIndex: j, 2891 series: series[i], 2892 seriesIndex: i }; 2893 } 2894 2895 return null; 2896 } 2897 2898 function onMouseMove(e) { 2899 if (options.grid.hoverable) 2900 triggerClickHoverEvent("plothover", e, 2901 function (s) { return s["hoverable"] != false; }); 2902 } 2903 2904 function onMouseLeave(e) { 2905 if (options.grid.hoverable) 2906 triggerClickHoverEvent("plothover", e, 2907 function (s) { return false; }); 2908 } 2909 2910 function onClick(e) { 2911 triggerClickHoverEvent("plotclick", e, 2912 function (s) { return s["clickable"] != false; }); 2913 } 2914 2915 // trigger click or hover event (they send the same parameters 2916 // so we share their code) 2917 function triggerClickHoverEvent(eventname, event, seriesFilter) { 2918 var offset = eventHolder.offset(), 2919 canvasX = event.pageX - offset.left - plotOffset.left, 2920 canvasY = event.pageY - offset.top - plotOffset.top, 2921 pos = canvasToAxisCoords({ left: canvasX, top: canvasY }); 2922 2923 pos.pageX = event.pageX; 2924 pos.pageY = event.pageY; 2925 2926 var item = findNearbyItem(canvasX, canvasY, seriesFilter); 2927 2928 if (item) { 2929 // fill in mouse pos for any listeners out there 2930 item.pageX = parseInt(item.series.xaxis.p2c(item.datapoint[0]) + offset.left + plotOffset.left, 10); 2931 item.pageY = parseInt(item.series.yaxis.p2c(item.datapoint[1]) + offset.top + plotOffset.top, 10); 2932 } 2933 2934 if (options.grid.autoHighlight) { 2935 // clear auto-highlights 2936 for (var i = 0; i < highlights.length; ++i) { 2937 var h = highlights[i]; 2938 if (h.auto == eventname && 2939 !(item && h.series == item.series && 2940 h.point[0] == item.datapoint[0] && 2941 h.point[1] == item.datapoint[1])) 2942 unhighlight(h.series, h.point); 2943 } 2944 2945 if (item) 2946 highlight(item.series, item.datapoint, eventname); 2947 } 2948 2949 placeholder.trigger(eventname, [ pos, item ]); 2950 } 2951 2952 function triggerRedrawOverlay() { 2953 var t = options.interaction.redrawOverlayInterval; 2954 if (t == -1) { // skip event queue 2955 drawOverlay(); 2956 return; 2957 } 2958 2959 if (!redrawTimeout) 2960 redrawTimeout = setTimeout(drawOverlay, t); 2961 } 2962 2963 function drawOverlay() { 2964 redrawTimeout = null; 2965 2966 // draw highlights 2967 octx.save(); 2968 overlay.clear(); 2969 octx.translate(plotOffset.left, plotOffset.top); 2970 2971 var i, hi; 2972 for (i = 0; i < highlights.length; ++i) { 2973 hi = highlights[i]; 2974 2975 if (hi.series.bars.show) 2976 drawBarHighlight(hi.series, hi.point); 2977 else 2978 drawPointHighlight(hi.series, hi.point); 2979 } 2980 octx.restore(); 2981 2982 executeHooks(hooks.drawOverlay, [octx]); 2983 } 2984 2985 function highlight(s, point, auto) { 2986 if (typeof s == "number") 2987 s = series[s]; 2988 2989 if (typeof point == "number") { 2990 var ps = s.datapoints.pointsize; 2991 point = s.datapoints.points.slice(ps * point, ps * (point + 1)); 2992 } 2993 2994 var i = indexOfHighlight(s, point); 2995 if (i == -1) { 2996 highlights.push({ series: s, point: point, auto: auto }); 2997 2998 triggerRedrawOverlay(); 2999 } 3000 else if (!auto) 3001 highlights[i].auto = false; 3002 } 3003 3004 function unhighlight(s, point) { 3005 if (s == null && point == null) { 3006 highlights = []; 3007 triggerRedrawOverlay(); 3008 return; 3009 } 3010 3011 if (typeof s == "number") 3012 s = series[s]; 3013 3014 if (typeof point == "number") { 3015 var ps = s.datapoints.pointsize; 3016 point = s.datapoints.points.slice(ps * point, ps * (point + 1)); 3017 } 3018 3019 var i = indexOfHighlight(s, point); 3020 if (i != -1) { 3021 highlights.splice(i, 1); 3022 3023 triggerRedrawOverlay(); 3024 } 3025 } 3026 3027 function indexOfHighlight(s, p) { 3028 for (var i = 0; i < highlights.length; ++i) { 3029 var h = highlights[i]; 3030 if (h.series == s && h.point[0] == p[0] 3031 && h.point[1] == p[1]) 3032 return i; 3033 } 3034 return -1; 3035 } 3036 3037 function drawPointHighlight(series, point) { 3038 var x = point[0], y = point[1], 3039 axisx = series.xaxis, axisy = series.yaxis, 3040 highlightColor = (typeof series.highlightColor === "string") ? series.highlightColor : $.color.parse(series.color).scale('a', 0.5).toString(); 3041 3042 if (x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max) 3043 return; 3044 3045 var pointRadius = series.points.radius + series.points.lineWidth / 2; 3046 octx.lineWidth = pointRadius; 3047 octx.strokeStyle = highlightColor; 3048 var radius = 1.5 * pointRadius; 3049 x = axisx.p2c(x); 3050 y = axisy.p2c(y); 3051 3052 octx.beginPath(); 3053 if (series.points.symbol == "circle") 3054 octx.arc(x, y, radius, 0, 2 * Math.PI, false); 3055 else 3056 series.points.symbol(octx, x, y, radius, false); 3057 octx.closePath(); 3058 octx.stroke(); 3059 } 3060 3061 function drawBarHighlight(series, point) { 3062 var highlightColor = (typeof series.highlightColor === "string") ? series.highlightColor : $.color.parse(series.color).scale('a', 0.5).toString(), 3063 fillStyle = highlightColor, 3064 barLeft; 3065 3066 switch (series.bars.align) { 3067 case "left": 3068 barLeft = 0; 3069 break; 3070 case "right": 3071 barLeft = -series.bars.barWidth; 3072 break; 3073 default: 3074 barLeft = -series.bars.barWidth / 2; 3075 } 3076 3077 octx.lineWidth = series.bars.lineWidth; 3078 octx.strokeStyle = highlightColor; 3079 3080 drawBar(point[0], point[1], point[2] || 0, barLeft, barLeft + series.bars.barWidth, 3081 function () { return fillStyle; }, series.xaxis, series.yaxis, octx, series.bars.horizontal, series.bars.lineWidth); 3082 } 3083 3084 function getColorOrGradient(spec, bottom, top, defaultColor) { 3085 if (typeof spec == "string") 3086 return spec; 3087 else { 3088 // assume this is a gradient spec; IE currently only 3089 // supports a simple vertical gradient properly, so that's 3090 // what we support too 3091 var gradient = ctx.createLinearGradient(0, top, 0, bottom); 3092 3093 for (var i = 0, l = spec.colors.length; i < l; ++i) { 3094 var c = spec.colors[i]; 3095 if (typeof c != "string") { 3096 var co = $.color.parse(defaultColor); 3097 if (c.brightness != null) 3098 co = co.scale('rgb', c.brightness); 3099 if (c.opacity != null) 3100 co.a *= c.opacity; 3101 c = co.toString(); 3102 } 3103 gradient.addColorStop(i / (l - 1), c); 3104 } 3105 3106 return gradient; 3107 } 3108 } 3109 } 3110 3111 // Add the plot function to the top level of the jQuery object 3112 3113 $.plot = function(placeholder, data, options) { 3114 //var t0 = new Date(); 3115 var plot = new Plot($(placeholder), data, options, $.plot.plugins); 3116 //(window.console ? console.log : alert)("time used (msecs): " + ((new Date()).getTime() - t0.getTime())); 3117 return plot; 3118 }; 3119 3120 $.plot.version = "0.8.2"; 3121 3122 $.plot.plugins = []; 3123 3124 // Also add the plot function as a chainable property 3125 3126 $.fn.plot = function(data, options) { 3127 return this.each(function() { 3128 $.plot(this, data, options); 3129 }); 3130 }; 3131 3132 // round to nearby lower multiple of base 3133 function floorInBase(n, base) { 3134 return base * Math.floor(n / base); 3135 } 3136 3137})(jQuery);
Line numbers count LF bytes from the start of the resource, as the search results do. Vendor segments are library code the classifier recognised; they are stored but not indexed. Bytes are shown as Latin1 characters, one per byte.