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3168 lines
120 KiB
3168 lines
120 KiB
/* Javascript plotting library for jQuery, version 0.8.3. |
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Copyright (c) 2007-2014 IOLA and Ole Laursen. |
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Licensed under the MIT license. |
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*/ |
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// first an inline dependency, jquery.colorhelpers.js, we inline it here |
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// for convenience |
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/* Plugin for jQuery for working with colors. |
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* |
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* Version 1.1. |
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* |
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* Inspiration from jQuery color animation plugin by John Resig. |
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* |
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* Released under the MIT license by Ole Laursen, October 2009. |
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* |
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* Examples: |
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* |
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* $.color.parse("#fff").scale('rgb', 0.25).add('a', -0.5).toString() |
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* var c = $.color.extract($("#mydiv"), 'background-color'); |
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* console.log(c.r, c.g, c.b, c.a); |
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* $.color.make(100, 50, 25, 0.4).toString() // returns "rgba(100,50,25,0.4)" |
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* |
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* Note that .scale() and .add() return the same modified object |
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* instead of making a new one. |
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* |
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* V. 1.1: Fix error handling so e.g. parsing an empty string does |
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* produce a color rather than just crashing. |
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*/ |
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(function($){$.color={};$.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=$.trim(str).toLowerCase();if(name=="transparent")return m(255,255,255,0);else{res=lookupColors[name]||[0,0,0];return m(res[0],res[1],res[2])}};var lookupColors={aqua:[0,255,255],azure:[240,255,255],beige:[245,245,220],black:[0,0,0],blue:[0,0,255],brown:[165,42,42],cyan:[0,255,255],darkblue:[0,0,139],darkcyan:[0,139,139],darkgrey:[169,169,169],darkgreen:[0,100,0],darkkhaki:[189,183,107],darkmagenta:[139,0,139],darkolivegreen:[85,107,47],darkorange:[255,140,0],darkorchid:[153,50,204],darkred:[139,0,0],darksalmon:[233,150,122],darkviolet:[148,0,211],fuchsia:[255,0,255],gold:[255,215,0],green:[0,128,0],indigo:[75,0,130],khaki:[240,230,140],lightblue:[173,216,230],lightcyan:[224,255,255],lightgreen:[144,238,144],lightgrey:[211,211,211],lightpink:[255,182,193],lightyellow:[255,255,224],lime:[0,255,0],magenta:[255,0,255],maroon:[128,0,0],navy:[0,0,128],olive:[128,128,0],orange:[255,165,0],pink:[255,192,203],purple:[128,0,128],violet:[128,0,128],red:[255,0,0],silver:[192,192,192],white:[255,255,255],yellow:[255,255,0]}})(jQuery); |
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// the actual Flot code |
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(function($) { |
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// Cache the prototype hasOwnProperty for faster access |
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var hasOwnProperty = Object.prototype.hasOwnProperty; |
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// A shim to provide 'detach' to jQuery versions prior to 1.4. Using a DOM |
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// operation produces the same effect as detach, i.e. removing the element |
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// without touching its jQuery data. |
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// Do not merge this into Flot 0.9, since it requires jQuery 1.4.4+. |
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if (!$.fn.detach) { |
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$.fn.detach = function() { |
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return this.each(function() { |
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if (this.parentNode) { |
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this.parentNode.removeChild( this ); |
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} |
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}); |
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}; |
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} |
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/////////////////////////////////////////////////////////////////////////// |
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// The Canvas object is a wrapper around an HTML5 <canvas> tag. |
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// |
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// @constructor |
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// @param {string} cls List of classes to apply to the canvas. |
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// @param {element} container Element onto which to append the canvas. |
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// |
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// Requiring a container is a little iffy, but unfortunately canvas |
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// operations don't work unless the canvas is attached to the DOM. |
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function Canvas(cls, container) { |
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var element = container.children("." + cls)[0]; |
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if (element == null) { |
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element = document.createElement("canvas"); |
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element.className = cls; |
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$(element).css({ direction: "ltr", position: "absolute", left: 0, top: 0 }) |
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.appendTo(container); |
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// If HTML5 Canvas isn't available, fall back to [Ex|Flash]canvas |
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if (!element.getContext) { |
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if (window.G_vmlCanvasManager) { |
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element = window.G_vmlCanvasManager.initElement(element); |
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} else { |
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throw new Error("Canvas is not available. If you're using IE with a fall-back such as Excanvas, then there's either a mistake in your conditional include, or the page has no DOCTYPE and is rendering in Quirks Mode."); |
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} |
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} |
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} |
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this.element = element; |
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var context = this.context = element.getContext("2d"); |
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// Determine the screen's ratio of physical to device-independent |
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// pixels. This is the ratio between the canvas width that the browser |
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// advertises and the number of pixels actually present in that space. |
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// The iPhone 4, for example, has a device-independent width of 320px, |
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// but its screen is actually 640px wide. It therefore has a pixel |
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// ratio of 2, while most normal devices have a ratio of 1. |
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var devicePixelRatio = window.devicePixelRatio || 1, |
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backingStoreRatio = |
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context.webkitBackingStorePixelRatio || |
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context.mozBackingStorePixelRatio || |
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context.msBackingStorePixelRatio || |
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context.oBackingStorePixelRatio || |
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context.backingStorePixelRatio || 1; |
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this.pixelRatio = devicePixelRatio / backingStoreRatio; |
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// Size the canvas to match the internal dimensions of its container |
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this.resize(container.width(), container.height()); |
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// Collection of HTML div layers for text overlaid onto the canvas |
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this.textContainer = null; |
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this.text = {}; |
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// Cache of text fragments and metrics, so we can avoid expensively |
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// re-calculating them when the plot is re-rendered in a loop. |
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this._textCache = {}; |
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} |
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// Resizes the canvas to the given dimensions. |
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// |
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// @param {number} width New width of the canvas, in pixels. |
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// @param {number} width New height of the canvas, in pixels. |
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Canvas.prototype.resize = function(width, height) { |
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if (width <= 0 || height <= 0) { |
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throw new Error("Invalid dimensions for plot, width = " + width + ", height = " + height); |
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} |
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var element = this.element, |
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context = this.context, |
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pixelRatio = this.pixelRatio; |
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// Resize the canvas, increasing its density based on the display's |
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// pixel ratio; basically giving it more pixels without increasing the |
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// size of its element, to take advantage of the fact that retina |
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// displays have that many more pixels in the same advertised space. |
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// Resizing should reset the state (excanvas seems to be buggy though) |
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if (this.width != width) { |
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element.width = width * pixelRatio; |
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element.style.width = width + "px"; |
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this.width = width; |
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} |
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if (this.height != height) { |
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element.height = height * pixelRatio; |
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element.style.height = height + "px"; |
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this.height = height; |
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} |
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// Save the context, so we can reset in case we get replotted. The |
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// restore ensure that we're really back at the initial state, and |
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// should be safe even if we haven't saved the initial state yet. |
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context.restore(); |
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context.save(); |
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// Scale the coordinate space to match the display density; so even though we |
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// may have twice as many pixels, we still want lines and other drawing to |
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// appear at the same size; the extra pixels will just make them crisper. |
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context.scale(pixelRatio, pixelRatio); |
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}; |
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// Clears the entire canvas area, not including any overlaid HTML text |
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Canvas.prototype.clear = function() { |
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this.context.clearRect(0, 0, this.width, this.height); |
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}; |
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// Finishes rendering the canvas, including managing the text overlay. |
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Canvas.prototype.render = function() { |
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var cache = this._textCache; |
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// For each text layer, add elements marked as active that haven't |
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// already been rendered, and remove those that are no longer active. |
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for (var layerKey in cache) { |
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if (hasOwnProperty.call(cache, layerKey)) { |
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var layer = this.getTextLayer(layerKey), |
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layerCache = cache[layerKey]; |
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layer.hide(); |
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for (var styleKey in layerCache) { |
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if (hasOwnProperty.call(layerCache, styleKey)) { |
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var styleCache = layerCache[styleKey]; |
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for (var key in styleCache) { |
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if (hasOwnProperty.call(styleCache, key)) { |
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var positions = styleCache[key].positions; |
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for (var i = 0, position; position = positions[i]; i++) { |
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if (position.active) { |
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if (!position.rendered) { |
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layer.append(position.element); |
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position.rendered = true; |
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} |
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} else { |
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positions.splice(i--, 1); |
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if (position.rendered) { |
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position.element.detach(); |
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} |
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} |
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} |
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if (positions.length == 0) { |
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delete styleCache[key]; |
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} |
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} |
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} |
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} |
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} |
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layer.show(); |
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} |
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} |
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}; |
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// Creates (if necessary) and returns the text overlay container. |
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// |
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// @param {string} classes String of space-separated CSS classes used to |
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// uniquely identify the text layer. |
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// @return {object} The jQuery-wrapped text-layer div. |
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Canvas.prototype.getTextLayer = function(classes) { |
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var layer = this.text[classes]; |
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// Create the text layer if it doesn't exist |
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if (layer == null) { |
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// Create the text layer container, if it doesn't exist |
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if (this.textContainer == null) { |
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this.textContainer = $("<div class='flot-text'></div>") |
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.css({ |
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position: "absolute", |
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top: 0, |
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left: 0, |
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bottom: 0, |
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right: 0, |
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'font-size': "smaller", |
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color: "#545454" |
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}) |
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.insertAfter(this.element); |
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} |
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layer = this.text[classes] = $("<div></div>") |
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.addClass(classes) |
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.css({ |
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position: "absolute", |
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top: 0, |
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left: 0, |
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bottom: 0, |
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right: 0 |
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}) |
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.appendTo(this.textContainer); |
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} |
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return layer; |
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}; |
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// Creates (if necessary) and returns a text info object. |
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// |
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// The object looks like this: |
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// |
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// { |
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// width: Width of the text's wrapper div. |
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// height: Height of the text's wrapper div. |
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// element: The jQuery-wrapped HTML div containing the text. |
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// positions: Array of positions at which this text is drawn. |
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// } |
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// |
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// The positions array contains objects that look like this: |
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// |
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// { |
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// active: Flag indicating whether the text should be visible. |
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// rendered: Flag indicating whether the text is currently visible. |
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// element: The jQuery-wrapped HTML div containing the text. |
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// x: X coordinate at which to draw the text. |
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// y: Y coordinate at which to draw the text. |
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// } |
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// |
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// Each position after the first receives a clone of the original element. |
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// |
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// The idea is that that the width, height, and general 'identity' of the |
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// text is constant no matter where it is placed; the placements are a |
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// secondary property. |
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// |
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// Canvas maintains a cache of recently-used text info objects; getTextInfo |
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// either returns the cached element or creates a new entry. |
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// |
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// @param {string} layer A string of space-separated CSS classes uniquely |
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// identifying the layer containing this text. |
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// @param {string} text Text string to retrieve info for. |
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// @param {(string|object)=} font Either a string of space-separated CSS |
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// classes or a font-spec object, defining the text's font and style. |
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// @param {number=} angle Angle at which to rotate the text, in degrees. |
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// Angle is currently unused, it will be implemented in the future. |
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// @param {number=} width Maximum width of the text before it wraps. |
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// @return {object} a text info object. |
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Canvas.prototype.getTextInfo = function(layer, text, font, angle, width) { |
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var textStyle, layerCache, styleCache, info; |
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// Cast the value to a string, in case we were given a number or such |
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text = "" + text; |
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// If the font is a font-spec object, generate a CSS font definition |
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if (typeof font === "object") { |
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textStyle = font.style + " " + font.variant + " " + font.weight + " " + font.size + "px/" + font.lineHeight + "px " + font.family; |
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} else { |
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textStyle = font; |
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} |
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// Retrieve (or create) the cache for the text's layer and styles |
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layerCache = this._textCache[layer]; |
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if (layerCache == null) { |
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layerCache = this._textCache[layer] = {}; |
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} |
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styleCache = layerCache[textStyle]; |
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if (styleCache == null) { |
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styleCache = layerCache[textStyle] = {}; |
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} |
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info = styleCache[text]; |
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// If we can't find a matching element in our cache, create a new one |
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if (info == null) { |
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var element = $("<div></div>").html(text) |
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.css({ |
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position: "absolute", |
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'max-width': width, |
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top: -9999 |
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}) |
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.appendTo(this.getTextLayer(layer)); |
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if (typeof font === "object") { |
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element.css({ |
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font: textStyle, |
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color: font.color |
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}); |
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} else if (typeof font === "string") { |
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element.addClass(font); |
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} |
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info = styleCache[text] = { |
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width: element.outerWidth(true), |
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height: element.outerHeight(true), |
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element: element, |
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positions: [] |
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}; |
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element.detach(); |
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} |
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return info; |
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}; |
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// Adds a text string to the canvas text overlay. |
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// |
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// The text isn't drawn immediately; it is marked as rendering, which will |
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// result in its addition to the canvas on the next render pass. |
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// |
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// @param {string} layer A string of space-separated CSS classes uniquely |
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// identifying the layer containing this text. |
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// @param {number} x X coordinate at which to draw the text. |
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// @param {number} y Y coordinate at which to draw the text. |
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// @param {string} text Text string to draw. |
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// @param {(string|object)=} font Either a string of space-separated CSS |
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// classes or a font-spec object, defining the text's font and style. |
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// @param {number=} angle Angle at which to rotate the text, in degrees. |
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// Angle is currently unused, it will be implemented in the future. |
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// @param {number=} width Maximum width of the text before it wraps. |
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// @param {string=} halign Horizontal alignment of the text; either "left", |
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// "center" or "right". |
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// @param {string=} valign Vertical alignment of the text; either "top", |
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// "middle" or "bottom". |
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Canvas.prototype.addText = function(layer, x, y, text, font, angle, width, halign, valign) { |
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var info = this.getTextInfo(layer, text, font, angle, width), |
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positions = info.positions; |
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// Tweak the div's position to match the text's alignment |
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if (halign == "center") { |
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x -= info.width / 2; |
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} else if (halign == "right") { |
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x -= info.width; |
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} |
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if (valign == "middle") { |
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y -= info.height / 2; |
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} else if (valign == "bottom") { |
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y -= info.height; |
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} |
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// Determine whether this text already exists at this position. |
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// If so, mark it for inclusion in the next render pass. |
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for (var i = 0, position; position = positions[i]; i++) { |
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if (position.x == x && position.y == y) { |
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position.active = true; |
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return; |
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} |
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} |
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// If the text doesn't exist at this position, create a new entry |
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// For the very first position we'll re-use the original element, |
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// while for subsequent ones we'll clone it. |
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position = { |
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active: true, |
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rendered: false, |
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element: positions.length ? info.element.clone() : info.element, |
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x: x, |
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y: y |
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}; |
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positions.push(position); |
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// Move the element to its final position within the container |
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position.element.css({ |
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top: Math.round(y), |
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left: Math.round(x), |
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'text-align': halign // In case the text wraps |
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}); |
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}; |
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// Removes one or more text strings from the canvas text overlay. |
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// |
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// If no parameters are given, all text within the layer is removed. |
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// |
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// Note that the text is not immediately removed; it is simply marked as |
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// inactive, which will result in its removal on the next render pass. |
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// This avoids the performance penalty for 'clear and redraw' behavior, |
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// where we potentially get rid of all text on a layer, but will likely |
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// add back most or all of it later, as when redrawing axes, for example. |
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// |
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// @param {string} layer A string of space-separated CSS classes uniquely |
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// identifying the layer containing this text. |
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// @param {number=} x X coordinate of the text. |
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// @param {number=} y Y coordinate of the text. |
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// @param {string=} text Text string to remove. |
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// @param {(string|object)=} font Either a string of space-separated CSS |
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// classes or a font-spec object, defining the text's font and style. |
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// @param {number=} angle Angle at which the text is rotated, in degrees. |
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// Angle is currently unused, it will be implemented in the future. |
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Canvas.prototype.removeText = function(layer, x, y, text, font, angle) { |
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if (text == null) { |
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var layerCache = this._textCache[layer]; |
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if (layerCache != null) { |
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for (var styleKey in layerCache) { |
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if (hasOwnProperty.call(layerCache, styleKey)) { |
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var styleCache = layerCache[styleKey]; |
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for (var key in styleCache) { |
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if (hasOwnProperty.call(styleCache, key)) { |
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var positions = styleCache[key].positions; |
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for (var i = 0, position; position = positions[i]; i++) { |
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position.active = false; |
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} |
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} |
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} |
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} |
|
} |
|
} |
|
} else { |
|
var positions = this.getTextInfo(layer, text, font, angle).positions; |
|
for (var i = 0, position; position = positions[i]; i++) { |
|
if (position.x == x && position.y == y) { |
|
position.active = false; |
|
} |
|
} |
|
} |
|
}; |
|
|
|
/////////////////////////////////////////////////////////////////////////// |
|
// The top-level container for the entire plot. |
|
|
|
function Plot(placeholder, data_, options_, plugins) { |
|
// data is on the form: |
|
// [ series1, series2 ... ] |
|
// where series is either just the data as [ [x1, y1], [x2, y2], ... ] |
|
// or { data: [ [x1, y1], [x2, y2], ... ], label: "some label", ... } |
|
|
|
var series = [], |
|
options = { |
|
// the color theme used for graphs |
|
colors: ["#edc240", "#afd8f8", "#cb4b4b", "#4da74d", "#9440ed"], |
|
legend: { |
|
show: true, |
|
noColumns: 1, // number of colums in legend table |
|
labelFormatter: null, // fn: string -> string |
|
labelBoxBorderColor: "#ccc", // border color for the little label boxes |
|
container: null, // container (as jQuery object) to put legend in, null means default on top of graph |
|
position: "ne", // position of default legend container within plot |
|
margin: 5, // distance from grid edge to default legend container within plot |
|
backgroundColor: null, // null means auto-detect |
|
backgroundOpacity: 0.85, // set to 0 to avoid background |
|
sorted: null // default to no legend sorting |
|
}, |
|
xaxis: { |
|
show: null, // null = auto-detect, true = always, false = never |
|
position: "bottom", // or "top" |
|
mode: null, // null or "time" |
|
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" } |
|
color: null, // base color, labels, ticks |
|
tickColor: null, // possibly different color of ticks, e.g. "rgba(0,0,0,0.15)" |
|
transform: null, // null or f: number -> number to transform axis |
|
inverseTransform: null, // if transform is set, this should be the inverse function |
|
min: null, // min. value to show, null means set automatically |
|
max: null, // max. value to show, null means set automatically |
|
autoscaleMargin: null, // margin in % to add if auto-setting min/max |
|
ticks: null, // either [1, 3] or [[1, "a"], 3] or (fn: axis info -> ticks) or app. number of ticks for auto-ticks |
|
tickFormatter: null, // fn: number -> string |
|
labelWidth: null, // size of tick labels in pixels |
|
labelHeight: null, |
|
reserveSpace: null, // whether to reserve space even if axis isn't shown |
|
tickLength: null, // size in pixels of ticks, or "full" for whole line |
|
alignTicksWithAxis: null, // axis number or null for no sync |
|
tickDecimals: null, // no. of decimals, null means auto |
|
tickSize: null, // number or [number, "unit"] |
|
minTickSize: null // number or [number, "unit"] |
|
}, |
|
yaxis: { |
|
autoscaleMargin: 0.02, |
|
position: "left" // or "right" |
|
}, |
|
xaxes: [], |
|
yaxes: [], |
|
series: { |
|
points: { |
|
show: false, |
|
radius: 3, |
|
lineWidth: 2, // in pixels |
|
fill: true, |
|
fillColor: "#ffffff", |
|
symbol: "circle" // or callback |
|
}, |
|
lines: { |
|
// we don't put in show: false so we can see |
|
// whether lines were actively disabled |
|
lineWidth: 2, // in pixels |
|
fill: false, |
|
fillColor: null, |
|
steps: false |
|
// Omit 'zero', so we can later default its value to |
|
// match that of the 'fill' option. |
|
}, |
|
bars: { |
|
show: false, |
|
lineWidth: 2, // in pixels |
|
barWidth: 1, // in units of the x axis |
|
fill: true, |
|
fillColor: null, |
|
align: "left", // "left", "right", or "center" |
|
horizontal: false, |
|
zero: true |
|
}, |
|
shadowSize: 3, |
|
highlightColor: null |
|
}, |
|
grid: { |
|
show: true, |
|
aboveData: false, |
|
color: "#545454", // primary color used for outline and labels |
|
backgroundColor: null, // null for transparent, else color |
|
borderColor: null, // set if different from the grid color |
|
tickColor: null, // color for the ticks, e.g. "rgba(0,0,0,0.15)" |
|
margin: 0, // distance from the canvas edge to the grid |
|
labelMargin: 5, // in pixels |
|
axisMargin: 8, // in pixels |
|
borderWidth: 2, // in pixels |
|
minBorderMargin: null, // in pixels, null means taken from points radius |
|
markings: null, // array of ranges or fn: axes -> array of ranges |
|
markingsColor: "#f4f4f4", |
|
markingsLineWidth: 2, |
|
// interactive stuff |
|
clickable: false, |
|
hoverable: false, |
|
autoHighlight: true, // highlight in case mouse is near |
|
mouseActiveRadius: 10 // how far the mouse can be away to activate an item |
|
}, |
|
interaction: { |
|
redrawOverlayInterval: 1000/60 // time between updates, -1 means in same flow |
|
}, |
|
hooks: {} |
|
}, |
|
surface = null, // the canvas for the plot itself |
|
overlay = null, // canvas for interactive stuff on top of plot |
|
eventHolder = null, // jQuery object that events should be bound to |
|
ctx = null, octx = null, |
|
xaxes = [], yaxes = [], |
|
plotOffset = { left: 0, right: 0, top: 0, bottom: 0}, |
|
plotWidth = 0, plotHeight = 0, |
|
hooks = { |
|
processOptions: [], |
|
processRawData: [], |
|
processDatapoints: [], |
|
processOffset: [], |
|
drawBackground: [], |
|
drawSeries: [], |
|
draw: [], |
|
bindEvents: [], |
|
drawOverlay: [], |
|
shutdown: [] |
|
}, |
|
plot = this; |
|
|
|
// public functions |
|
plot.setData = setData; |
|
plot.setupGrid = setupGrid; |
|
plot.draw = draw; |
|
plot.getPlaceholder = function() { return placeholder; }; |
|
plot.getCanvas = function() { return surface.element; }; |
|
plot.getPlotOffset = function() { return plotOffset; }; |
|
plot.width = function () { return plotWidth; }; |
|
plot.height = function () { return plotHeight; }; |
|
plot.offset = function () { |
|
var o = eventHolder.offset(); |
|
o.left += plotOffset.left; |
|
o.top += plotOffset.top; |
|
return o; |
|
}; |
|
plot.getData = function () { return series; }; |
|
plot.getAxes = function () { |
|
var res = {}, i; |
|
$.each(xaxes.concat(yaxes), function (_, axis) { |
|
if (axis) |
|
res[axis.direction + (axis.n != 1 ? axis.n : "") + "axis"] = axis; |
|
}); |
|
return res; |
|
}; |
|
plot.getXAxes = function () { return xaxes; }; |
|
plot.getYAxes = function () { return yaxes; }; |
|
plot.c2p = canvasToAxisCoords; |
|
plot.p2c = axisToCanvasCoords; |
|
plot.getOptions = function () { return options; }; |
|
plot.highlight = highlight; |
|
plot.unhighlight = unhighlight; |
|
plot.triggerRedrawOverlay = triggerRedrawOverlay; |
|
plot.pointOffset = function(point) { |
|
return { |
|
left: parseInt(xaxes[axisNumber(point, "x") - 1].p2c(+point.x) + plotOffset.left, 10), |
|
top: parseInt(yaxes[axisNumber(point, "y") - 1].p2c(+point.y) + plotOffset.top, 10) |
|
}; |
|
}; |
|
plot.shutdown = shutdown; |
|
plot.destroy = function () { |
|
shutdown(); |
|
placeholder.removeData("plot").empty(); |
|
|
|
series = []; |
|
options = null; |
|
surface = null; |
|
overlay = null; |
|
eventHolder = null; |
|
ctx = null; |
|
octx = null; |
|
xaxes = []; |
|
yaxes = []; |
|
hooks = null; |
|
highlights = []; |
|
plot = null; |
|
}; |
|
plot.resize = function () { |
|
var width = placeholder.width(), |
|
height = placeholder.height(); |
|
surface.resize(width, height); |
|
overlay.resize(width, height); |
|
}; |
|
|
|
// public attributes |
|
plot.hooks = hooks; |
|
|
|
// initialize |
|
initPlugins(plot); |
|
parseOptions(options_); |
|
setupCanvases(); |
|
setData(data_); |
|
setupGrid(); |
|
draw(); |
|
bindEvents(); |
|
|
|
|
|
function executeHooks(hook, args) { |
|
args = [plot].concat(args); |
|
for (var i = 0; i < hook.length; ++i) |
|
hook[i].apply(this, args); |
|
} |
|
|
|
function initPlugins() { |
|
|
|
// References to key classes, allowing plugins to modify them |
|
|
|
var classes = { |
|
Canvas: Canvas |
|
}; |
|
|
|
for (var i = 0; i < plugins.length; ++i) { |
|
var p = plugins[i]; |
|
p.init(plot, classes); |
|
if (p.options) |
|
$.extend(true, options, p.options); |
|
} |
|
} |
|
|
|
function parseOptions(opts) { |
|
|
|
$.extend(true, options, opts); |
|
|
|
// $.extend merges arrays, rather than replacing them. When less |
|
// colors are provided than the size of the default palette, we |
|
// end up with those colors plus the remaining defaults, which is |
|
// not expected behavior; avoid it by replacing them here. |
|
|
|
if (opts && opts.colors) { |
|
options.colors = opts.colors; |
|
} |
|
|
|
if (options.xaxis.color == null) |
|
options.xaxis.color = $.color.parse(options.grid.color).scale('a', 0.22).toString(); |
|
if (options.yaxis.color == null) |
|
options.yaxis.color = $.color.parse(options.grid.color).scale('a', 0.22).toString(); |
|
|
|
if (options.xaxis.tickColor == null) // grid.tickColor for back-compatibility |
|
options.xaxis.tickColor = options.grid.tickColor || options.xaxis.color; |
|
if (options.yaxis.tickColor == null) // grid.tickColor for back-compatibility |
|
options.yaxis.tickColor = options.grid.tickColor || options.yaxis.color; |
|
|
|
if (options.grid.borderColor == null) |
|
options.grid.borderColor = options.grid.color; |
|
if (options.grid.tickColor == null) |
|
options.grid.tickColor = $.color.parse(options.grid.color).scale('a', 0.22).toString(); |
|
|
|
// Fill in defaults for axis options, including any unspecified |
|
// font-spec fields, if a font-spec was provided. |
|
|
|
// If no x/y axis options were provided, create one of each anyway, |
|
// since the rest of the code assumes that they exist. |
|
|
|
var i, axisOptions, axisCount, |
|
fontSize = placeholder.css("font-size"), |
|
fontSizeDefault = fontSize ? +fontSize.replace("px", "") : 13, |
|
fontDefaults = { |
|
style: placeholder.css("font-style"), |
|
size: Math.round(0.8 * fontSizeDefault), |
|
variant: placeholder.css("font-variant"), |
|
weight: placeholder.css("font-weight"), |
|
family: placeholder.css("font-family") |
|
}; |
|
|
|
axisCount = options.xaxes.length || 1; |
|
for (i = 0; i < axisCount; ++i) { |
|
|
|
axisOptions = options.xaxes[i]; |
|
if (axisOptions && !axisOptions.tickColor) { |
|
axisOptions.tickColor = axisOptions.color; |
|
} |
|
|
|
axisOptions = $.extend(true, {}, options.xaxis, axisOptions); |
|
options.xaxes[i] = axisOptions; |
|
|
|
if (axisOptions.font) { |
|
axisOptions.font = $.extend({}, fontDefaults, axisOptions.font); |
|
if (!axisOptions.font.color) { |
|
axisOptions.font.color = axisOptions.color; |
|
} |
|
if (!axisOptions.font.lineHeight) { |
|
axisOptions.font.lineHeight = Math.round(axisOptions.font.size * 1.15); |
|
} |
|
} |
|
} |
|
|
|
axisCount = options.yaxes.length || 1; |
|
for (i = 0; i < axisCount; ++i) { |
|
|
|
axisOptions = options.yaxes[i]; |
|
if (axisOptions && !axisOptions.tickColor) { |
|
axisOptions.tickColor = axisOptions.color; |
|
} |
|
|
|
axisOptions = $.extend(true, {}, options.yaxis, axisOptions); |
|
options.yaxes[i] = axisOptions; |
|
|
|
if (axisOptions.font) { |
|
axisOptions.font = $.extend({}, fontDefaults, axisOptions.font); |
|
if (!axisOptions.font.color) { |
|
axisOptions.font.color = axisOptions.color; |
|
} |
|
if (!axisOptions.font.lineHeight) { |
|
axisOptions.font.lineHeight = Math.round(axisOptions.font.size * 1.15); |
|
} |
|
} |
|
} |
|
|
|
// backwards compatibility, to be removed in future |
|
if (options.xaxis.noTicks && options.xaxis.ticks == null) |
|
options.xaxis.ticks = options.xaxis.noTicks; |
|
if (options.yaxis.noTicks && options.yaxis.ticks == null) |
|
options.yaxis.ticks = options.yaxis.noTicks; |
|
if (options.x2axis) { |
|
options.xaxes[1] = $.extend(true, {}, options.xaxis, options.x2axis); |
|
options.xaxes[1].position = "top"; |
|
// Override the inherit to allow the axis to auto-scale |
|
if (options.x2axis.min == null) { |
|
options.xaxes[1].min = null; |
|
} |
|
if (options.x2axis.max == null) { |
|
options.xaxes[1].max = null; |
|
} |
|
} |
|
if (options.y2axis) { |
|
options.yaxes[1] = $.extend(true, {}, options.yaxis, options.y2axis); |
|
options.yaxes[1].position = "right"; |
|
// Override the inherit to allow the axis to auto-scale |
|
if (options.y2axis.min == null) { |
|
options.yaxes[1].min = null; |
|
} |
|
if (options.y2axis.max == null) { |
|
options.yaxes[1].max = null; |
|
} |
|
} |
|
if (options.grid.coloredAreas) |
|
options.grid.markings = options.grid.coloredAreas; |
|
if (options.grid.coloredAreasColor) |
|
options.grid.markingsColor = options.grid.coloredAreasColor; |
|
if (options.lines) |
|
$.extend(true, options.series.lines, options.lines); |
|
if (options.points) |
|
$.extend(true, options.series.points, options.points); |
|
if (options.bars) |
|
$.extend(true, options.series.bars, options.bars); |
|
if (options.shadowSize != null) |
|
options.series.shadowSize = options.shadowSize; |
|
if (options.highlightColor != null) |
|
options.series.highlightColor = options.highlightColor; |
|
|
|
// save options on axes for future reference |
|
for (i = 0; i < options.xaxes.length; ++i) |
|
getOrCreateAxis(xaxes, i + 1).options = options.xaxes[i]; |
|
for (i = 0; i < options.yaxes.length; ++i) |
|
getOrCreateAxis(yaxes, i + 1).options = options.yaxes[i]; |
|
|
|
// add hooks from options |
|
for (var n in hooks) |
|
if (options.hooks[n] && options.hooks[n].length) |
|
hooks[n] = hooks[n].concat(options.hooks[n]); |
|
|
|
executeHooks(hooks.processOptions, [options]); |
|
} |
|
|
|
function setData(d) { |
|
series = parseData(d); |
|
fillInSeriesOptions(); |
|
processData(); |
|
} |
|
|
|
function parseData(d) { |
|
var res = []; |
|
for (var i = 0; i < d.length; ++i) { |
|
var s = $.extend(true, {}, options.series); |
|
|
|
if (d[i].data != null) { |
|
s.data = d[i].data; // move the data instead of deep-copy |
|
delete d[i].data; |
|
|
|
$.extend(true, s, d[i]); |
|
|
|
d[i].data = s.data; |
|
} |
|
else |
|
s.data = d[i]; |
|
res.push(s); |
|
} |
|
|
|
return res; |
|
} |
|
|
|
function axisNumber(obj, coord) { |
|
var a = obj[coord + "axis"]; |
|
if (typeof a == "object") // if we got a real axis, extract number |
|
a = a.n; |
|
if (typeof a != "number") |
|
a = 1; // default to first axis |
|
return a; |
|
} |
|
|
|
function allAxes() { |
|
// return flat array without annoying null entries |
|
return $.grep(xaxes.concat(yaxes), function (a) { return a; }); |
|
} |
|
|
|
function canvasToAxisCoords(pos) { |
|
// return an object with x/y corresponding to all used axes |
|
var res = {}, i, axis; |
|
for (i = 0; i < xaxes.length; ++i) { |
|
axis = xaxes[i]; |
|
if (axis && axis.used) |
|
res["x" + axis.n] = axis.c2p(pos.left); |
|
} |
|
|
|
for (i = 0; i < yaxes.length; ++i) { |
|
axis = yaxes[i]; |
|
if (axis && axis.used) |
|
res["y" + axis.n] = axis.c2p(pos.top); |
|
} |
|
|
|
if (res.x1 !== undefined) |
|
res.x = res.x1; |
|
if (res.y1 !== undefined) |
|
res.y = res.y1; |
|
|
|
return res; |
|
} |
|
|
|
function axisToCanvasCoords(pos) { |
|
// get canvas coords from the first pair of x/y found in pos |
|
var res = {}, i, axis, key; |
|
|
|
for (i = 0; i < xaxes.length; ++i) { |
|
axis = xaxes[i]; |
|
if (axis && axis.used) { |
|
key = "x" + axis.n; |
|
if (pos[key] == null && axis.n == 1) |
|
key = "x"; |
|
|
|
if (pos[key] != null) { |
|
res.left = axis.p2c(pos[key]); |
|
break; |
|
} |
|
} |
|
} |
|
|
|
for (i = 0; i < yaxes.length; ++i) { |
|
axis = yaxes[i]; |
|
if (axis && axis.used) { |
|
key = "y" + axis.n; |
|
if (pos[key] == null && axis.n == 1) |
|
key = "y"; |
|
|
|
if (pos[key] != null) { |
|
res.top = axis.p2c(pos[key]); |
|
break; |
|
} |
|
} |
|
} |
|
|
|
return res; |
|
} |
|
|
|
function getOrCreateAxis(axes, number) { |
|
if (!axes[number - 1]) |
|
axes[number - 1] = { |
|
n: number, // save the number for future reference |
|
direction: axes == xaxes ? "x" : "y", |
|
options: $.extend(true, {}, axes == xaxes ? options.xaxis : options.yaxis) |
|
}; |
|
|
|
return axes[number - 1]; |
|
} |
|
|
|
function fillInSeriesOptions() { |
|
|
|
var neededColors = series.length, maxIndex = -1, i; |
|
|
|
// Subtract the number of series that already have fixed colors or |
|
// color indexes from the number that we still need to generate. |
|
|
|
for (i = 0; i < series.length; ++i) { |
|
var sc = series[i].color; |
|
if (sc != null) { |
|
neededColors--; |
|
if (typeof sc == "number" && sc > maxIndex) { |
|
maxIndex = sc; |
|
} |
|
} |
|
} |
|
|
|
// If any of the series have fixed color indexes, then we need to |
|
// generate at least as many colors as the highest index. |
|
|
|
if (neededColors <= maxIndex) { |
|
neededColors = maxIndex + 1; |
|
} |
|
|
|
// Generate all the colors, using first the option colors and then |
|
// variations on those colors once they're exhausted. |
|
|
|
var c, colors = [], colorPool = options.colors, |
|
colorPoolSize = colorPool.length, variation = 0; |
|
|
|
for (i = 0; i < neededColors; i++) { |
|
|
|
c = $.color.parse(colorPool[i % colorPoolSize] || "#666"); |
|
|
|
// Each time we exhaust the colors in the pool we adjust |
|
// a scaling factor used to produce more variations on |
|
// those colors. The factor alternates negative/positive |
|
// to produce lighter/darker colors. |
|
|
|
// Reset the variation after every few cycles, or else |
|
// it will end up producing only white or black colors. |
|
|
|
if (i % colorPoolSize == 0 && i) { |
|
if (variation >= 0) { |
|
if (variation < 0.5) { |
|
variation = -variation - 0.2; |
|
} else variation = 0; |
|
} else variation = -variation; |
|
} |
|
|
|
colors[i] = c.scale('rgb', 1 + variation); |
|
} |
|
|
|
// Finalize the series options, filling in their colors |
|
|
|
var colori = 0, s; |
|
for (i = 0; i < series.length; ++i) { |
|
s = series[i]; |
|
|
|
// assign colors |
|
if (s.color == null) { |
|
s.color = colors[colori].toString(); |
|
++colori; |
|
} |
|
else if (typeof s.color == "number") |
|
s.color = colors[s.color].toString(); |
|
|
|
// turn on lines automatically in case nothing is set |
|
if (s.lines.show == null) { |
|
var v, show = true; |
|
for (v in s) |
|
if (s[v] && s[v].show) { |
|
show = false; |
|
break; |
|
} |
|
if (show) |
|
s.lines.show = true; |
|
} |
|
|
|
// If nothing was provided for lines.zero, default it to match |
|
// lines.fill, since areas by default should extend to zero. |
|
|
|
if (s.lines.zero == null) { |
|
s.lines.zero = !!s.lines.fill; |
|
} |
|
|
|
// setup axes |
|
s.xaxis = getOrCreateAxis(xaxes, axisNumber(s, "x")); |
|
s.yaxis = getOrCreateAxis(yaxes, axisNumber(s, "y")); |
|
} |
|
} |
|
|
|
function processData() { |
|
var topSentry = Number.POSITIVE_INFINITY, |
|
bottomSentry = Number.NEGATIVE_INFINITY, |
|
fakeInfinity = Number.MAX_VALUE, |
|
i, j, k, m, length, |
|
s, points, ps, x, y, axis, val, f, p, |
|
data, format; |
|
|
|
function updateAxis(axis, min, max) { |
|
if (min < axis.datamin && min != -fakeInfinity) |
|
axis.datamin = min; |
|
if (max > axis.datamax && max != fakeInfinity) |
|
axis.datamax = max; |
|
} |
|
|
|
$.each(allAxes(), function (_, axis) { |
|
// init axis |
|
axis.datamin = topSentry; |
|
axis.datamax = bottomSentry; |
|
axis.used = false; |
|
}); |
|
|
|
for (i = 0; i < series.length; ++i) { |
|
s = series[i]; |
|
s.datapoints = { points: [] }; |
|
|
|
executeHooks(hooks.processRawData, [ s, s.data, s.datapoints ]); |
|
} |
|
|
|
// first pass: clean and copy data |
|
for (i = 0; i < series.length; ++i) { |
|
s = series[i]; |
|
|
|
data = s.data; |
|
format = s.datapoints.format; |
|
|
|
if (!format) { |
|
format = []; |
|
// find out how to copy |
|
format.push({ x: true, number: true, required: true }); |
|
format.push({ y: true, number: true, required: true }); |
|
|
|
if (s.bars.show || (s.lines.show && s.lines.fill)) { |
|
var autoscale = !!((s.bars.show && s.bars.zero) || (s.lines.show && s.lines.zero)); |
|
format.push({ y: true, number: true, required: false, defaultValue: 0, autoscale: autoscale }); |
|
if (s.bars.horizontal) { |
|
delete format[format.length - 1].y; |
|
format[format.length - 1].x = true; |
|
} |
|
} |
|
|
|
s.datapoints.format = format; |
|
} |
|
|
|
if (s.datapoints.pointsize != null) |
|
continue; // already filled in |
|
|
|
s.datapoints.pointsize = format.length; |
|
|
|
ps = s.datapoints.pointsize; |
|
points = s.datapoints.points; |
|
|
|
var insertSteps = s.lines.show && s.lines.steps; |
|
s.xaxis.used = s.yaxis.used = true; |
|
|
|
for (j = k = 0; j < data.length; ++j, k += ps) { |
|
p = data[j]; |
|
|
|
var nullify = p == null; |
|
if (!nullify) { |
|
for (m = 0; m < ps; ++m) { |
|
val = p[m]; |
|
f = format[m]; |
|
|
|
if (f) { |
|
if (f.number && val != null) { |
|
val = +val; // convert to number |
|
if (isNaN(val)) |
|
val = null; |
|
else if (val == Infinity) |
|
val = fakeInfinity; |
|
else if (val == -Infinity) |
|
val = -fakeInfinity; |
|
} |
|
|
|
if (val == null) { |
|
if (f.required) |
|
nullify = true; |
|
|
|
if (f.defaultValue != null) |
|
val = f.defaultValue; |
|
} |
|
} |
|
|
|
points[k + m] = val; |
|
} |
|
} |
|
|
|
if (nullify) { |
|
for (m = 0; m < ps; ++m) { |
|
val = points[k + m]; |
|
if (val != null) { |
|
f = format[m]; |
|
// extract min/max info |
|
if (f.autoscale !== false) { |
|
if (f.x) { |
|
updateAxis(s.xaxis, val, val); |
|
} |
|
if (f.y) { |
|
updateAxis(s.yaxis, val, val); |
|
} |
|
} |
|
} |
|
points[k + m] = null; |
|
} |
|
} |
|
else { |
|
// a little bit of line specific stuff that |
|
// perhaps shouldn't be here, but lacking |
|
// better means... |
|
if (insertSteps && k > 0 |
|
&& points[k - ps] != null |
|
&& points[k - ps] != points[k] |
|
&& points[k - ps + 1] != points[k + 1]) { |
|
// copy the point to make room for a middle point |
|
for (m = 0; m < ps; ++m) |
|
points[k + ps + m] = points[k + m]; |
|
|
|
// middle point has same y |
|
points[k + 1] = points[k - ps + 1]; |
|
|
|
// we've added a point, better reflect that |
|
k += ps; |
|
} |
|
} |
|
} |
|
} |
|
|
|
// give the hooks a chance to run |
|
for (i = 0; i < series.length; ++i) { |
|
s = series[i]; |
|
|
|
executeHooks(hooks.processDatapoints, [ s, s.datapoints]); |
|
} |
|
|
|
// second pass: find datamax/datamin for auto-scaling |
|
for (i = 0; i < series.length; ++i) { |
|
s = series[i]; |
|
points = s.datapoints.points; |
|
ps = s.datapoints.pointsize; |
|
format = s.datapoints.format; |
|
|
|
var xmin = topSentry, ymin = topSentry, |
|
xmax = bottomSentry, ymax = bottomSentry; |
|
|
|
for (j = 0; j < points.length; j += ps) { |
|
if (points[j] == null) |
|
continue; |
|
|
|
for (m = 0; m < ps; ++m) { |
|
val = points[j + m]; |
|
f = format[m]; |
|
if (!f || f.autoscale === false || val == fakeInfinity || val == -fakeInfinity) |
|
continue; |
|
|
|
if (f.x) { |
|
if (val < xmin) |
|
xmin = val; |
|
if (val > xmax) |
|
xmax = val; |
|
} |
|
if (f.y) { |
|
if (val < ymin) |
|
ymin = val; |
|
if (val > ymax) |
|
ymax = val; |
|
} |
|
} |
|
} |
|
|
|
if (s.bars.show) { |
|
// make sure we got room for the bar on the dancing floor |
|
var delta; |
|
|
|
switch (s.bars.align) { |
|
case "left": |
|
delta = 0; |
|
break; |
|
case "right": |
|
delta = -s.bars.barWidth; |
|
break; |
|
default: |
|
delta = -s.bars.barWidth / 2; |
|
} |
|
|
|
if (s.bars.horizontal) { |
|
ymin += delta; |
|
ymax += delta + s.bars.barWidth; |
|
} |
|
else { |
|
xmin += delta; |
|
xmax += delta + s.bars.barWidth; |
|
} |
|
} |
|
|
|
updateAxis(s.xaxis, xmin, xmax); |
|
updateAxis(s.yaxis, ymin, ymax); |
|
} |
|
|
|
$.each(allAxes(), function (_, axis) { |
|
if (axis.datamin == topSentry) |
|
axis.datamin = null; |
|
if (axis.datamax == bottomSentry) |
|
axis.datamax = null; |
|
}); |
|
} |
|
|
|
function setupCanvases() { |
|
|
|
// Make sure the placeholder is clear of everything except canvases |
|
// from a previous plot in this container that we'll try to re-use. |
|
|
|
placeholder.css("padding", 0) // padding messes up the positioning |
|
.children().filter(function(){ |
|
return !$(this).hasClass("flot-overlay") && !$(this).hasClass('flot-base'); |
|
}).remove(); |
|
|
|
if (placeholder.css("position") == 'static') |
|
placeholder.css("position", "relative"); // for positioning labels and overlay |
|
|
|
surface = new Canvas("flot-base", placeholder); |
|
overlay = new Canvas("flot-overlay", placeholder); // overlay canvas for interactive features |
|
|
|
ctx = surface.context; |
|
octx = overlay.context; |
|
|
|
// define which element we're listening for events on |
|
eventHolder = $(overlay.element).unbind(); |
|
|
|
// If we're re-using a plot object, shut down the old one |
|
|
|
var existing = placeholder.data("plot"); |
|
|
|
if (existing) { |
|
existing.shutdown(); |
|
overlay.clear(); |
|
} |
|
|
|
// save in case we get replotted |
|
placeholder.data("plot", plot); |
|
} |
|
|
|
function bindEvents() { |
|
// bind events |
|
if (options.grid.hoverable) { |
|
eventHolder.mousemove(onMouseMove); |
|
|
|
// Use bind, rather than .mouseleave, because we officially |
|
// still support jQuery 1.2.6, which doesn't define a shortcut |
|
// for mouseenter or mouseleave. This was a bug/oversight that |
|
// was fixed somewhere around 1.3.x. We can return to using |
|
// .mouseleave when we drop support for 1.2.6. |
|
|
|
eventHolder.bind("mouseleave", onMouseLeave); |
|
} |
|
|
|
if (options.grid.clickable) |
|
eventHolder.click(onClick); |
|
|
|
executeHooks(hooks.bindEvents, [eventHolder]); |
|
} |
|
|
|
function shutdown() { |
|
if (redrawTimeout) |
|
clearTimeout(redrawTimeout); |
|
|
|
eventHolder.unbind("mousemove", onMouseMove); |
|
eventHolder.unbind("mouseleave", onMouseLeave); |
|
eventHolder.unbind("click", onClick); |
|
|
|
executeHooks(hooks.shutdown, [eventHolder]); |
|
} |
|
|
|
function setTransformationHelpers(axis) { |
|
// set helper functions on the axis, assumes plot area |
|
// has been computed already |
|
|
|
function identity(x) { return x; } |
|
|
|
var s, m, t = axis.options.transform || identity, |
|
it = axis.options.inverseTransform; |
|
|
|
// precompute how much the axis is scaling a point |
|
// in canvas space |
|
if (axis.direction == "x") { |
|
s = axis.scale = plotWidth / Math.abs(t(axis.max) - t(axis.min)); |
|
m = Math.min(t(axis.max), t(axis.min)); |
|
} |
|
else { |
|
s = axis.scale = plotHeight / Math.abs(t(axis.max) - t(axis.min)); |
|
s = -s; |
|
m = Math.max(t(axis.max), t(axis.min)); |
|
} |
|
|
|
// data point to canvas coordinate |
|
if (t == identity) // slight optimization |
|
axis.p2c = function (p) { return (p - m) * s; }; |
|
else |
|
axis.p2c = function (p) { return (t(p) - m) * s; }; |
|
// canvas coordinate to data point |
|
if (!it) |
|
axis.c2p = function (c) { return m + c / s; }; |
|
else |
|
axis.c2p = function (c) { return it(m + c / s); }; |
|
} |
|
|
|
function measureTickLabels(axis) { |
|
|
|
var opts = axis.options, |
|
ticks = axis.ticks || [], |
|
labelWidth = opts.labelWidth || 0, |
|
labelHeight = opts.labelHeight || 0, |
|
maxWidth = labelWidth || (axis.direction == "x" ? Math.floor(surface.width / (ticks.length || 1)) : null), |
|
legacyStyles = axis.direction + "Axis " + axis.direction + axis.n + "Axis", |
|
layer = "flot-" + axis.direction + "-axis flot-" + axis.direction + axis.n + "-axis " + legacyStyles, |
|
font = opts.font || "flot-tick-label tickLabel"; |
|
|
|
for (var i = 0; i < ticks.length; ++i) { |
|
|
|
var t = ticks[i]; |
|
|
|
if (!t.label) |
|
continue; |
|
|
|
var info = surface.getTextInfo(layer, t.label, font, null, maxWidth); |
|
|
|
labelWidth = Math.max(labelWidth, info.width); |
|
labelHeight = Math.max(labelHeight, info.height); |
|
} |
|
|
|
axis.labelWidth = opts.labelWidth || labelWidth; |
|
axis.labelHeight = opts.labelHeight || labelHeight; |
|
} |
|
|
|
function allocateAxisBoxFirstPhase(axis) { |
|
// find the bounding box of the axis by looking at label |
|
// widths/heights and ticks, make room by diminishing the |
|
// plotOffset; this first phase only looks at one |
|
// dimension per axis, the other dimension depends on the |
|
// other axes so will have to wait |
|
|
|
var lw = axis.labelWidth, |
|
lh = axis.labelHeight, |
|
pos = axis.options.position, |
|
isXAxis = axis.direction === "x", |
|
tickLength = axis.options.tickLength, |
|
axisMargin = options.grid.axisMargin, |
|
padding = options.grid.labelMargin, |
|
innermost = true, |
|
outermost = true, |
|
first = true, |
|
found = false; |
|
|
|
// Determine the axis's position in its direction and on its side |
|
|
|
$.each(isXAxis ? xaxes : yaxes, function(i, a) { |
|
if (a && (a.show || a.reserveSpace)) { |
|
if (a === axis) { |
|
found = true; |
|
} else if (a.options.position === pos) { |
|
if (found) { |
|
outermost = false; |
|
} else { |
|
innermost = false; |
|
} |
|
} |
|
if (!found) { |
|
first = false; |
|
} |
|
} |
|
}); |
|
|
|
// The outermost axis on each side has no margin |
|
|
|
if (outermost) { |
|
axisMargin = 0; |
|
} |
|
|
|
// The ticks for the first axis in each direction stretch across |
|
|
|
if (tickLength == null) { |
|
tickLength = first ? "full" : 5; |
|
} |
|
|
|
if (!isNaN(+tickLength)) |
|
padding += +tickLength; |
|
|
|
if (isXAxis) { |
|
lh += padding; |
|
|
|
if (pos == "bottom") { |
|
plotOffset.bottom += lh + axisMargin; |
|
axis.box = { top: surface.height - plotOffset.bottom, height: lh }; |
|
} |
|
else { |
|
axis.box = { top: plotOffset.top + axisMargin, height: lh }; |
|
plotOffset.top += lh + axisMargin; |
|
} |
|
} |
|
else { |
|
lw += padding; |
|
|
|
if (pos == "left") { |
|
axis.box = { left: plotOffset.left + axisMargin, width: lw }; |
|
plotOffset.left += lw + axisMargin; |
|
} |
|
else { |
|
plotOffset.right += lw + axisMargin; |
|
axis.box = { left: surface.width - plotOffset.right, width: lw }; |
|
} |
|
} |
|
|
|
// save for future reference |
|
axis.position = pos; |
|
axis.tickLength = tickLength; |
|
axis.box.padding = padding; |
|
axis.innermost = innermost; |
|
} |
|
|
|
function allocateAxisBoxSecondPhase(axis) { |
|
// now that all axis boxes have been placed in one |
|
// dimension, we can set the remaining dimension coordinates |
|
if (axis.direction == "x") { |
|
axis.box.left = plotOffset.left - axis.labelWidth / 2; |
|
axis.box.width = surface.width - plotOffset.left - plotOffset.right + axis.labelWidth; |
|
} |
|
else { |
|
axis.box.top = plotOffset.top - axis.labelHeight / 2; |
|
axis.box.height = surface.height - plotOffset.bottom - plotOffset.top + axis.labelHeight; |
|
} |
|
} |
|
|
|
function adjustLayoutForThingsStickingOut() { |
|
// possibly adjust plot offset to ensure everything stays |
|
// inside the canvas and isn't clipped off |
|
|
|
var minMargin = options.grid.minBorderMargin, |
|
axis, i; |
|
|
|
// check stuff from the plot (FIXME: this should just read |
|
// a value from the series, otherwise it's impossible to |
|
// customize) |
|
if (minMargin == null) { |
|
minMargin = 0; |
|
for (i = 0; i < series.length; ++i) |
|
minMargin = Math.max(minMargin, 2 * (series[i].points.radius + series[i].points.lineWidth/2)); |
|
} |
|
|
|
var margins = { |
|
left: minMargin, |
|
right: minMargin, |
|
top: minMargin, |
|
bottom: minMargin |
|
}; |
|
|
|
// check axis labels, note we don't check the actual |
|
// labels but instead use the overall width/height to not |
|
// jump as much around with replots |
|
$.each(allAxes(), function (_, axis) { |
|
if (axis.reserveSpace && axis.ticks && axis.ticks.length) { |
|
if (axis.direction === "x") { |
|
margins.left = Math.max(margins.left, axis.labelWidth / 2); |
|
margins.right = Math.max(margins.right, axis.labelWidth / 2); |
|
} else { |
|
margins.bottom = Math.max(margins.bottom, axis.labelHeight / 2); |
|
margins.top = Math.max(margins.top, axis.labelHeight / 2); |
|
} |
|
} |
|
}); |
|
|
|
plotOffset.left = Math.ceil(Math.max(margins.left, plotOffset.left)); |
|
plotOffset.right = Math.ceil(Math.max(margins.right, plotOffset.right)); |
|
plotOffset.top = Math.ceil(Math.max(margins.top, plotOffset.top)); |
|
plotOffset.bottom = Math.ceil(Math.max(margins.bottom, plotOffset.bottom)); |
|
} |
|
|
|
function setupGrid() { |
|
var i, axes = allAxes(), showGrid = options.grid.show; |
|
|
|
// Initialize the plot's offset from the edge of the canvas |
|
|
|
for (var a in plotOffset) { |
|
var margin = options.grid.margin || 0; |
|
plotOffset[a] = typeof margin == "number" ? margin : margin[a] || 0; |
|
} |
|
|
|
executeHooks(hooks.processOffset, [plotOffset]); |
|
|
|
// If the grid is visible, add its border width to the offset |
|
|
|
for (var a in plotOffset) { |
|
if(typeof(options.grid.borderWidth) == "object") { |
|
plotOffset[a] += showGrid ? options.grid.borderWidth[a] : 0; |
|
} |
|
else { |
|
plotOffset[a] += showGrid ? options.grid.borderWidth : 0; |
|
} |
|
} |
|
|
|
$.each(axes, function (_, axis) { |
|
var axisOpts = axis.options; |
|
axis.show = axisOpts.show == null ? axis.used : axisOpts.show; |
|
axis.reserveSpace = axisOpts.reserveSpace == null ? axis.show : axisOpts.reserveSpace; |
|
setRange(axis); |
|
}); |
|
|
|
if (showGrid) { |
|
|
|
var allocatedAxes = $.grep(axes, function (axis) { |
|
return axis.show || axis.reserveSpace; |
|
}); |
|
|
|
$.each(allocatedAxes, function (_, axis) { |
|
// make the ticks |
|
setupTickGeneration(axis); |
|
setTicks(axis); |
|
snapRangeToTicks(axis, axis.ticks); |
|
// find labelWidth/Height for axis |
|
measureTickLabels(axis); |
|
}); |
|
|
|
// with all dimensions calculated, we can compute the |
|
// axis bounding boxes, start from the outside |
|
// (reverse order) |
|
for (i = allocatedAxes.length - 1; i >= 0; --i) |
|
allocateAxisBoxFirstPhase(allocatedAxes[i]); |
|
|
|
// make sure we've got enough space for things that |
|
// might stick out |
|
adjustLayoutForThingsStickingOut(); |
|
|
|
$.each(allocatedAxes, function (_, axis) { |
|
allocateAxisBoxSecondPhase(axis); |
|
}); |
|
} |
|
|
|
plotWidth = surface.width - plotOffset.left - plotOffset.right; |
|
plotHeight = surface.height - plotOffset.bottom - plotOffset.top; |
|
|
|
// now we got the proper plot dimensions, we can compute the scaling |
|
$.each(axes, function (_, axis) { |
|
setTransformationHelpers(axis); |
|
}); |
|
|
|
if (showGrid) { |
|
drawAxisLabels(); |
|
} |
|
|
|
insertLegend(); |
|
} |
|
|
|
function setRange(axis) { |
|
var opts = axis.options, |
|
min = +(opts.min != null ? opts.min : axis.datamin), |
|
max = +(opts.max != null ? opts.max : axis.datamax), |
|
delta = max - min; |
|
|
|
if (delta == 0.0) { |
|
// degenerate case |
|
var widen = max == 0 ? 1 : 0.01; |
|
|
|
if (opts.min == null) |
|
min -= widen; |
|
// always widen max if we couldn't widen min to ensure we |
|
// don't fall into min == max which doesn't work |
|
if (opts.max == null || opts.min != null) |
|
max += widen; |
|
} |
|
else { |
|
// consider autoscaling |
|
var margin = opts.autoscaleMargin; |
|
if (margin != null) { |
|
if (opts.min == null) { |
|
min -= delta * margin; |
|
// make sure we don't go below zero if all values |
|
// are positive |
|
if (min < 0 && axis.datamin != null && axis.datamin >= 0) |
|
min = 0; |
|
} |
|
if (opts.max == null) { |
|
max += delta * margin; |
|
if (max > 0 && axis.datamax != null && axis.datamax <= 0) |
|
max = 0; |
|
} |
|
} |
|
} |
|
axis.min = min; |
|
axis.max = max; |
|
} |
|
|
|
function setupTickGeneration(axis) { |
|
var opts = axis.options; |
|
|
|
// estimate number of ticks |
|
var noTicks; |
|
if (typeof opts.ticks == "number" && opts.ticks > 0) |
|
noTicks = opts.ticks; |
|
else |
|
// heuristic based on the model a*sqrt(x) fitted to |
|
// some data points that seemed reasonable |
|
noTicks = 0.3 * Math.sqrt(axis.direction == "x" ? surface.width : surface.height); |
|
|
|
var delta = (axis.max - axis.min) / noTicks, |
|
dec = -Math.floor(Math.log(delta) / Math.LN10), |
|
maxDec = opts.tickDecimals; |
|
|
|
if (maxDec != null && dec > maxDec) { |
|
dec = maxDec; |
|
} |
|
|
|
var magn = Math.pow(10, -dec), |
|
norm = delta / magn, // norm is between 1.0 and 10.0 |
|
size; |
|
|
|
if (norm < 1.5) { |
|
size = 1; |
|
} else if (norm < 3) { |
|
size = 2; |
|
// special case for 2.5, requires an extra decimal |
|
if (norm > 2.25 && (maxDec == null || dec + 1 <= maxDec)) { |
|
size = 2.5; |
|
++dec; |
|
} |
|
} else if (norm < 7.5) { |
|
size = 5; |
|
} else { |
|
size = 10; |
|
} |
|
|
|
size *= magn; |
|
|
|
if (opts.minTickSize != null && size < opts.minTickSize) { |
|
size = opts.minTickSize; |
|
} |
|
|
|
axis.delta = delta; |
|
axis.tickDecimals = Math.max(0, maxDec != null ? maxDec : dec); |
|
axis.tickSize = opts.tickSize || size; |
|
|
|
// Time mode was moved to a plug-in in 0.8, and since so many people use it |
|
// we'll add an especially friendly reminder to make sure they included it. |
|
|
|
if (opts.mode == "time" && !axis.tickGenerator) { |
|
throw new Error("Time mode requires the flot.time plugin."); |
|
} |
|
|
|
// Flot supports base-10 axes; any other mode else is handled by a plug-in, |
|
// like flot.time.js. |
|
|
|
if (!axis.tickGenerator) { |
|
|
|
axis.tickGenerator = function (axis) { |
|
|
|
var ticks = [], |
|
start = floorInBase(axis.min, axis.tickSize), |
|
i = 0, |
|
v = Number.NaN, |
|
prev; |
|
|
|
do { |
|
prev = v; |
|
v = start + i * axis.tickSize; |
|
ticks.push(v); |
|
++i; |
|
} while (v < axis.max && v != prev); |
|
return ticks; |
|
}; |
|
|
|
axis.tickFormatter = function (value, axis) { |
|
|
|
var factor = axis.tickDecimals ? Math.pow(10, axis.tickDecimals) : 1; |
|
var formatted = "" + Math.round(value * factor) / factor; |
|
|
|
// If tickDecimals was specified, ensure that we have exactly that |
|
// much precision; otherwise default to the value's own precision. |
|
|
|
if (axis.tickDecimals != null) { |
|
var decimal = formatted.indexOf("."); |
|
var precision = decimal == -1 ? 0 : formatted.length - decimal - 1; |
|
if (precision < axis.tickDecimals) { |
|
return (precision ? formatted : formatted + ".") + ("" + factor).substr(1, axis.tickDecimals - precision); |
|
} |
|
} |
|
|
|
return formatted; |
|
}; |
|
} |
|
|
|
if ($.isFunction(opts.tickFormatter)) |
|
axis.tickFormatter = function (v, axis) { return "" + opts.tickFormatter(v, axis); }; |
|
|
|
if (opts.alignTicksWithAxis != null) { |
|
var otherAxis = (axis.direction == "x" ? xaxes : yaxes)[opts.alignTicksWithAxis - 1]; |
|
if (otherAxis && otherAxis.used && otherAxis != axis) { |
|
// consider snapping min/max to outermost nice ticks |
|
var niceTicks = axis.tickGenerator(axis); |
|
if (niceTicks.length > 0) { |
|
if (opts.min == null) |
|
axis.min = Math.min(axis.min, niceTicks[0]); |
|
if (opts.max == null && niceTicks.length > 1) |
|
axis.max = Math.max(axis.max, niceTicks[niceTicks.length - 1]); |
|
} |
|
|
|
axis.tickGenerator = function (axis) { |
|
// copy ticks, scaled to this axis |
|
var ticks = [], v, i; |
|
for (i = 0; i < otherAxis.ticks.length; ++i) { |
|
v = (otherAxis.ticks[i].v - otherAxis.min) / (otherAxis.max - otherAxis.min); |
|
v = axis.min + v * (axis.max - axis.min); |
|
ticks.push(v); |
|
} |
|
return ticks; |
|
}; |
|
|
|
// we might need an extra decimal since forced |
|
// ticks don't necessarily fit naturally |
|
if (!axis.mode && opts.tickDecimals == null) { |
|
var extraDec = Math.max(0, -Math.floor(Math.log(axis.delta) / Math.LN10) + 1), |
|
ts = axis.tickGenerator(axis); |
|
|
|
// only proceed if the tick interval rounded |
|
// with an extra decimal doesn't give us a |
|
// zero at end |
|
if (!(ts.length > 1 && /\..*0$/.test((ts[1] - ts[0]).toFixed(extraDec)))) |
|
axis.tickDecimals = extraDec; |
|
} |
|
} |
|
} |
|
} |
|
|
|
function setTicks(axis) { |
|
var oticks = axis.options.ticks, ticks = []; |
|
if (oticks == null || (typeof oticks == "number" && oticks > 0)) |
|
ticks = axis.tickGenerator(axis); |
|
else if (oticks) { |
|
if ($.isFunction(oticks)) |
|
// generate the ticks |
|
ticks = oticks(axis); |
|
else |
|
ticks = oticks; |
|
} |
|
|
|
// clean up/labelify the supplied ticks, copy them over |
|
var i, v; |
|
axis.ticks = []; |
|
for (i = 0; i < ticks.length; ++i) { |
|
var label = null; |
|
var t = ticks[i]; |
|
if (typeof t == "object") { |
|
v = +t[0]; |
|
if (t.length > 1) |
|
label = t[1]; |
|
} |
|
else |
|
v = +t; |
|
if (label == null) |
|
label = axis.tickFormatter(v, axis); |
|
if (!isNaN(v)) |
|
axis.ticks.push({ v: v, label: label }); |
|
} |
|
} |
|
|
|
function snapRangeToTicks(axis, ticks) { |
|
if (axis.options.autoscaleMargin && ticks.length > 0) { |
|
// snap to ticks |
|
if (axis.options.min == null) |
|
axis.min = Math.min(axis.min, ticks[0].v); |
|
if (axis.options.max == null && ticks.length > 1) |
|
axis.max = Math.max(axis.max, ticks[ticks.length - 1].v); |
|
} |
|
} |
|
|
|
function draw() { |
|
|
|
surface.clear(); |
|
|
|
executeHooks(hooks.drawBackground, [ctx]); |
|
|
|
var grid = options.grid; |
|
|
|
// draw background, if any |
|
if (grid.show && grid.backgroundColor) |
|
drawBackground(); |
|
|
|
if (grid.show && !grid.aboveData) { |
|
drawGrid(); |
|
} |
|
|
|
for (var i = 0; i < series.length; ++i) { |
|
executeHooks(hooks.drawSeries, [ctx, series[i]]); |
|
drawSeries(series[i]); |
|
} |
|
|
|
executeHooks(hooks.draw, [ctx]); |
|
|
|
if (grid.show && grid.aboveData) { |
|
drawGrid(); |
|
} |
|
|
|
surface.render(); |
|
|
|
// A draw implies that either the axes or data have changed, so we |
|
// should probably update the overlay highlights as well. |
|
|
|
triggerRedrawOverlay(); |
|
} |
|
|
|
function extractRange(ranges, coord) { |
|
var axis, from, to, key, axes = allAxes(); |
|
|
|
for (var i = 0; i < axes.length; ++i) { |
|
axis = axes[i]; |
|
if (axis.direction == coord) { |
|
key = coord + axis.n + "axis"; |
|
if (!ranges[key] && axis.n == 1) |
|
key = coord + "axis"; // support x1axis as xaxis |
|
if (ranges[key]) { |
|
from = ranges[key].from; |
|
to = ranges[key].to; |
|
break; |
|
} |
|
} |
|
} |
|
|
|
// backwards-compat stuff - to be removed in future |
|
if (!ranges[key]) { |
|
axis = coord == "x" ? xaxes[0] : yaxes[0]; |
|
from = ranges[coord + "1"]; |
|
to = ranges[coord + "2"]; |
|
} |
|
|
|
// auto-reverse as an added bonus |
|
if (from != null && to != null && from > to) { |
|
var tmp = from; |
|
from = to; |
|
to = tmp; |
|
} |
|
|
|
return { from: from, to: to, axis: axis }; |
|
} |
|
|
|
function drawBackground() { |
|
ctx.save(); |
|
ctx.translate(plotOffset.left, plotOffset.top); |
|
|
|
ctx.fillStyle = getColorOrGradient(options.grid.backgroundColor, plotHeight, 0, "rgba(255, 255, 255, 0)"); |
|
ctx.fillRect(0, 0, plotWidth, plotHeight); |
|
ctx.restore(); |
|
} |
|
|
|
function drawGrid() { |
|
var i, axes, bw, bc; |
|
|
|
ctx.save(); |
|
ctx.translate(plotOffset.left, plotOffset.top); |
|
|
|
// draw markings |
|
var markings = options.grid.markings; |
|
if (markings) { |
|
if ($.isFunction(markings)) { |
|
axes = plot.getAxes(); |
|
// xmin etc. is backwards compatibility, to be |
|
// removed in the future |
|
axes.xmin = axes.xaxis.min; |
|
axes.xmax = axes.xaxis.max; |
|
axes.ymin = axes.yaxis.min; |
|
axes.ymax = axes.yaxis.max; |
|
|
|
markings = markings(axes); |
|
} |
|
|
|
for (i = 0; i < markings.length; ++i) { |
|
var m = markings[i], |
|
xrange = extractRange(m, "x"), |
|
yrange = extractRange(m, "y"); |
|
|
|
// fill in missing |
|
if (xrange.from == null) |
|
xrange.from = xrange.axis.min; |
|
if (xrange.to == null) |
|
xrange.to = xrange.axis.max; |
|
if (yrange.from == null) |
|
yrange.from = yrange.axis.min; |
|
if (yrange.to == null) |
|
yrange.to = yrange.axis.max; |
|
|
|
// clip |
|
if (xrange.to < xrange.axis.min || xrange.from > xrange.axis.max || |
|
yrange.to < yrange.axis.min || yrange.from > yrange.axis.max) |
|
continue; |
|
|
|
xrange.from = Math.max(xrange.from, xrange.axis.min); |
|
xrange.to = Math.min(xrange.to, xrange.axis.max); |
|
yrange.from = Math.max(yrange.from, yrange.axis.min); |
|
yrange.to = Math.min(yrange.to, yrange.axis.max); |
|
|
|
var xequal = xrange.from === xrange.to, |
|
yequal = yrange.from === yrange.to; |
|
|
|
if (xequal && yequal) { |
|
continue; |
|
} |
|
|
|
// then draw |
|
xrange.from = Math.floor(xrange.axis.p2c(xrange.from)); |
|
xrange.to = Math.floor(xrange.axis.p2c(xrange.to)); |
|
yrange.from = Math.floor(yrange.axis.p2c(yrange.from)); |
|
yrange.to = Math.floor(yrange.axis.p2c(yrange.to)); |
|
|
|
if (xequal || yequal) { |
|
var lineWidth = m.lineWidth || options.grid.markingsLineWidth, |
|
subPixel = lineWidth % 2 ? 0.5 : 0; |
|
ctx.beginPath(); |
|
ctx.strokeStyle = m.color || options.grid.markingsColor; |
|
ctx.lineWidth = lineWidth; |
|
if (xequal) { |
|
ctx.moveTo(xrange.to + subPixel, yrange.from); |
|
ctx.lineTo(xrange.to + subPixel, yrange.to); |
|
} else { |
|
ctx.moveTo(xrange.from, yrange.to + subPixel); |
|
ctx.lineTo(xrange.to, yrange.to + subPixel); |
|
} |
|
ctx.stroke(); |
|
} else { |
|
ctx.fillStyle = m.color || options.grid.markingsColor; |
|
ctx.fillRect(xrange.from, yrange.to, |
|
xrange.to - xrange.from, |
|
yrange.from - yrange.to); |
|
} |
|
} |
|
} |
|
|
|
// draw the ticks |
|
axes = allAxes(); |
|
bw = options.grid.borderWidth; |
|
|
|
for (var j = 0; j < axes.length; ++j) { |
|
var axis = axes[j], box = axis.box, |
|
t = axis.tickLength, x, y, xoff, yoff; |
|
if (!axis.show || axis.ticks.length == 0) |
|
continue; |
|
|
|
ctx.lineWidth = 1; |
|
|
|
// find the edges |
|
if (axis.direction == "x") { |
|
x = 0; |
|
if (t == "full") |
|
y = (axis.position == "top" ? 0 : plotHeight); |
|
else |
|
y = box.top - plotOffset.top + (axis.position == "top" ? box.height : 0); |
|
} |
|
else { |
|
y = 0; |
|
if (t == "full") |
|
x = (axis.position == "left" ? 0 : plotWidth); |
|
else |
|
x = box.left - plotOffset.left + (axis.position == "left" ? box.width : 0); |
|
} |
|
|
|
// draw tick bar |
|
if (!axis.innermost) { |
|
ctx.strokeStyle = axis.options.color; |
|
ctx.beginPath(); |
|
xoff = yoff = 0; |
|
if (axis.direction == "x") |
|
xoff = plotWidth + 1; |
|
else |
|
yoff = plotHeight + 1; |
|
|
|
if (ctx.lineWidth == 1) { |
|
if (axis.direction == "x") { |
|
y = Math.floor(y) + 0.5; |
|
} else { |
|
x = Math.floor(x) + 0.5; |
|
} |
|
} |
|
|
|
ctx.moveTo(x, y); |
|
ctx.lineTo(x + xoff, y + yoff); |
|
ctx.stroke(); |
|
} |
|
|
|
// draw ticks |
|
|
|
ctx.strokeStyle = axis.options.tickColor; |
|
|
|
ctx.beginPath(); |
|
for (i = 0; i < axis.ticks.length; ++i) { |
|
var v = axis.ticks[i].v; |
|
|
|
xoff = yoff = 0; |
|
|
|
if (isNaN(v) || v < axis.min || v > axis.max |
|
// skip those lying on the axes if we got a border |
|
|| (t == "full" |
|
&& ((typeof bw == "object" && bw[axis.position] > 0) || bw > 0) |
|
&& (v == axis.min || v == axis.max))) |
|
continue; |
|
|
|
if (axis.direction == "x") { |
|
x = axis.p2c(v); |
|
yoff = t == "full" ? -plotHeight : t; |
|
|
|
if (axis.position == "top") |
|
yoff = -yoff; |
|
} |
|
else { |
|
y = axis.p2c(v); |
|
xoff = t == "full" ? -plotWidth : t; |
|
|
|
if (axis.position == "left") |
|
xoff = -xoff; |
|
} |
|
|
|
if (ctx.lineWidth == 1) { |
|
if (axis.direction == "x") |
|
x = Math.floor(x) + 0.5; |
|
else |
|
y = Math.floor(y) + 0.5; |
|
} |
|
|
|
ctx.moveTo(x, y); |
|
ctx.lineTo(x + xoff, y + yoff); |
|
} |
|
|
|
ctx.stroke(); |
|
} |
|
|
|
|
|
// draw border |
|
if (bw) { |
|
// If either borderWidth or borderColor is an object, then draw the border |
|
// line by line instead of as one rectangle |
|
bc = options.grid.borderColor; |
|
if(typeof bw == "object" || typeof bc == "object") { |
|
if (typeof bw !== "object") { |
|
bw = {top: bw, right: bw, bottom: bw, left: bw}; |
|
} |
|
if (typeof bc !== "object") { |
|
bc = {top: bc, right: bc, bottom: bc, left: bc}; |
|
} |
|
|
|
if (bw.top > 0) { |
|
ctx.strokeStyle = bc.top; |
|
ctx.lineWidth = bw.top; |
|
ctx.beginPath(); |
|
ctx.moveTo(0 - bw.left, 0 - bw.top/2); |
|
ctx.lineTo(plotWidth, 0 - bw.top/2); |
|
ctx.stroke(); |
|
} |
|
|
|
if (bw.right > 0) { |
|
ctx.strokeStyle = bc.right; |
|
ctx.lineWidth = bw.right; |
|
ctx.beginPath(); |
|
ctx.moveTo(plotWidth + bw.right / 2, 0 - bw.top); |
|
ctx.lineTo(plotWidth + bw.right / 2, plotHeight); |
|
ctx.stroke(); |
|
} |
|
|
|
if (bw.bottom > 0) { |
|
ctx.strokeStyle = bc.bottom; |
|
ctx.lineWidth = bw.bottom; |
|
ctx.beginPath(); |
|
ctx.moveTo(plotWidth + bw.right, plotHeight + bw.bottom / 2); |
|
ctx.lineTo(0, plotHeight + bw.bottom / 2); |
|
ctx.stroke(); |
|
} |
|
|
|
if (bw.left > 0) { |
|
ctx.strokeStyle = bc.left; |
|
ctx.lineWidth = bw.left; |
|
ctx.beginPath(); |
|
ctx.moveTo(0 - bw.left/2, plotHeight + bw.bottom); |
|
ctx.lineTo(0- bw.left/2, 0); |
|
ctx.stroke(); |
|
} |
|
} |
|
else { |
|
ctx.lineWidth = bw; |
|
ctx.strokeStyle = options.grid.borderColor; |
|
ctx.strokeRect(-bw/2, -bw/2, plotWidth + bw, plotHeight + bw); |
|
} |
|
} |
|
|
|
ctx.restore(); |
|
} |
|
|
|
function drawAxisLabels() { |
|
|
|
$.each(allAxes(), function (_, axis) { |
|
var box = axis.box, |
|
legacyStyles = axis.direction + "Axis " + axis.direction + axis.n + "Axis", |
|
layer = "flot-" + axis.direction + "-axis flot-" + axis.direction + axis.n + "-axis " + legacyStyles, |
|
font = axis.options.font || "flot-tick-label tickLabel", |
|
tick, x, y, halign, valign; |
|
|
|
// Remove text before checking for axis.show and ticks.length; |
|
// otherwise plugins, like flot-tickrotor, that draw their own |
|
// tick labels will end up with both theirs and the defaults. |
|
|
|
surface.removeText(layer); |
|
|
|
if (!axis.show || axis.ticks.length == 0) |
|
return; |
|
|
|
for (var i = 0; i < axis.ticks.length; ++i) { |
|
|
|
tick = axis.ticks[i]; |
|
if (!tick.label || tick.v < axis.min || tick.v > axis.max) |
|
continue; |
|
|
|
if (axis.direction == "x") { |
|
halign = "center"; |
|
x = plotOffset.left + axis.p2c(tick.v); |
|
if (axis.position == "bottom") { |
|
y = box.top + box.padding; |
|
} else { |
|
y = box.top + box.height - box.padding; |
|
valign = "bottom"; |
|
} |
|
} else { |
|
valign = "middle"; |
|
y = plotOffset.top + axis.p2c(tick.v); |
|
if (axis.position == "left") { |
|
x = box.left + box.width - box.padding; |
|
halign = "right"; |
|
} else { |
|
x = box.left + box.padding; |
|
} |
|
} |
|
|
|
surface.addText(layer, x, y, tick.label, font, null, null, halign, valign); |
|
} |
|
}); |
|
} |
|
|
|
function drawSeries(series) { |
|
if (series.lines.show) |
|
drawSeriesLines(series); |
|
if (series.bars.show) |
|
drawSeriesBars(series); |
|
if (series.points.show) |
|
drawSeriesPoints(series); |
|
} |
|
|
|
function drawSeriesLines(series) { |
|
function plotLine(datapoints, xoffset, yoffset, axisx, axisy) { |
|
var points = datapoints.points, |
|
ps = datapoints.pointsize, |
|
prevx = null, prevy = null; |
|
|
|
ctx.beginPath(); |
|
for (var i = ps; i < points.length; i += ps) { |
|
var x1 = points[i - ps], y1 = points[i - ps + 1], |
|
x2 = points[i], y2 = points[i + 1]; |
|
|
|
if (x1 == null || x2 == null) |
|
continue; |
|
|
|
// clip with ymin |
|
if (y1 <= y2 && y1 < axisy.min) { |
|
if (y2 < axisy.min) |
|
continue; // line segment is outside |
|
// compute new intersection point |
|
x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
y1 = axisy.min; |
|
} |
|
else if (y2 <= y1 && y2 < axisy.min) { |
|
if (y1 < axisy.min) |
|
continue; |
|
x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
y2 = axisy.min; |
|
} |
|
|
|
// clip with ymax |
|
if (y1 >= y2 && y1 > axisy.max) { |
|
if (y2 > axisy.max) |
|
continue; |
|
x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
y1 = axisy.max; |
|
} |
|
else if (y2 >= y1 && y2 > axisy.max) { |
|
if (y1 > axisy.max) |
|
continue; |
|
x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
y2 = axisy.max; |
|
} |
|
|
|
// clip with xmin |
|
if (x1 <= x2 && x1 < axisx.min) { |
|
if (x2 < axisx.min) |
|
continue; |
|
y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
x1 = axisx.min; |
|
} |
|
else if (x2 <= x1 && x2 < axisx.min) { |
|
if (x1 < axisx.min) |
|
continue; |
|
y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
x2 = axisx.min; |
|
} |
|
|
|
// clip with xmax |
|
if (x1 >= x2 && x1 > axisx.max) { |
|
if (x2 > axisx.max) |
|
continue; |
|
y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
x1 = axisx.max; |
|
} |
|
else if (x2 >= x1 && x2 > axisx.max) { |
|
if (x1 > axisx.max) |
|
continue; |
|
y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
x2 = axisx.max; |
|
} |
|
|
|
if (x1 != prevx || y1 != prevy) |
|
ctx.moveTo(axisx.p2c(x1) + xoffset, axisy.p2c(y1) + yoffset); |
|
|
|
prevx = x2; |
|
prevy = y2; |
|
ctx.lineTo(axisx.p2c(x2) + xoffset, axisy.p2c(y2) + yoffset); |
|
} |
|
ctx.stroke(); |
|
} |
|
|
|
function plotLineArea(datapoints, axisx, axisy) { |
|
var points = datapoints.points, |
|
ps = datapoints.pointsize, |
|
bottom = Math.min(Math.max(0, axisy.min), axisy.max), |
|
i = 0, top, areaOpen = false, |
|
ypos = 1, segmentStart = 0, segmentEnd = 0; |
|
|
|
// we process each segment in two turns, first forward |
|
// direction to sketch out top, then once we hit the |
|
// end we go backwards to sketch the bottom |
|
while (true) { |
|
if (ps > 0 && i > points.length + ps) |
|
break; |
|
|
|
i += ps; // ps is negative if going backwards |
|
|
|
var x1 = points[i - ps], |
|
y1 = points[i - ps + ypos], |
|
x2 = points[i], y2 = points[i + ypos]; |
|
|
|
if (areaOpen) { |
|
if (ps > 0 && x1 != null && x2 == null) { |
|
// at turning point |
|
segmentEnd = i; |
|
ps = -ps; |
|
ypos = 2; |
|
continue; |
|
} |
|
|
|
if (ps < 0 && i == segmentStart + ps) { |
|
// done with the reverse sweep |
|
ctx.fill(); |
|
areaOpen = false; |
|
ps = -ps; |
|
ypos = 1; |
|
i = segmentStart = segmentEnd + ps; |
|
continue; |
|
} |
|
} |
|
|
|
if (x1 == null || x2 == null) |
|
continue; |
|
|
|
// clip x values |
|
|
|
// clip with xmin |
|
if (x1 <= x2 && x1 < axisx.min) { |
|
if (x2 < axisx.min) |
|
continue; |
|
y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
x1 = axisx.min; |
|
} |
|
else if (x2 <= x1 && x2 < axisx.min) { |
|
if (x1 < axisx.min) |
|
continue; |
|
y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
x2 = axisx.min; |
|
} |
|
|
|
// clip with xmax |
|
if (x1 >= x2 && x1 > axisx.max) { |
|
if (x2 > axisx.max) |
|
continue; |
|
y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
x1 = axisx.max; |
|
} |
|
else if (x2 >= x1 && x2 > axisx.max) { |
|
if (x1 > axisx.max) |
|
continue; |
|
y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1; |
|
x2 = axisx.max; |
|
} |
|
|
|
if (!areaOpen) { |
|
// open area |
|
ctx.beginPath(); |
|
ctx.moveTo(axisx.p2c(x1), axisy.p2c(bottom)); |
|
areaOpen = true; |
|
} |
|
|
|
// now first check the case where both is outside |
|
if (y1 >= axisy.max && y2 >= axisy.max) { |
|
ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.max)); |
|
ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.max)); |
|
continue; |
|
} |
|
else if (y1 <= axisy.min && y2 <= axisy.min) { |
|
ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.min)); |
|
ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.min)); |
|
continue; |
|
} |
|
|
|
// else it's a bit more complicated, there might |
|
// be a flat maxed out rectangle first, then a |
|
// triangular cutout or reverse; to find these |
|
// keep track of the current x values |
|
var x1old = x1, x2old = x2; |
|
|
|
// clip the y values, without shortcutting, we |
|
// go through all cases in turn |
|
|
|
// clip with ymin |
|
if (y1 <= y2 && y1 < axisy.min && y2 >= axisy.min) { |
|
x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
y1 = axisy.min; |
|
} |
|
else if (y2 <= y1 && y2 < axisy.min && y1 >= axisy.min) { |
|
x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
y2 = axisy.min; |
|
} |
|
|
|
// clip with ymax |
|
if (y1 >= y2 && y1 > axisy.max && y2 <= axisy.max) { |
|
x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
y1 = axisy.max; |
|
} |
|
else if (y2 >= y1 && y2 > axisy.max && y1 <= axisy.max) { |
|
x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1; |
|
y2 = axisy.max; |
|
} |
|
|
|
// if the x value was changed we got a rectangle |
|
// to fill |
|
if (x1 != x1old) { |
|
ctx.lineTo(axisx.p2c(x1old), axisy.p2c(y1)); |
|
// it goes to (x1, y1), but we fill that below |
|
} |
|
|
|
// fill triangular section, this sometimes result |
|
// in redundant points if (x1, y1) hasn't changed |
|
// from previous line to, but we just ignore that |
|
ctx.lineTo(axisx.p2c(x1), axisy.p2c(y1)); |
|
ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2)); |
|
|
|
// fill the other rectangle if it's there |
|
if (x2 != x2old) { |
|
ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2)); |
|
ctx.lineTo(axisx.p2c(x2old), axisy.p2c(y2)); |
|
} |
|
} |
|
} |
|
|
|
ctx.save(); |
|
ctx.translate(plotOffset.left, plotOffset.top); |
|
ctx.lineJoin = "round"; |
|
|
|
var lw = series.lines.lineWidth, |
|
sw = series.shadowSize; |
|
// FIXME: consider another form of shadow when filling is turned on |
|
if (lw > 0 && sw > 0) { |
|
// draw shadow as a thick and thin line with transparency |
|
ctx.lineWidth = sw; |
|
ctx.strokeStyle = "rgba(0,0,0,0.1)"; |
|
// position shadow at angle from the mid of line |
|
var angle = Math.PI/18; |
|
plotLine(series.datapoints, Math.sin(angle) * (lw/2 + sw/2), Math.cos(angle) * (lw/2 + sw/2), series.xaxis, series.yaxis); |
|
ctx.lineWidth = sw/2; |
|
plotLine(series.datapoints, Math.sin(angle) * (lw/2 + sw/4), Math.cos(angle) * (lw/2 + sw/4), series.xaxis, series.yaxis); |
|
} |
|
|
|
ctx.lineWidth = lw; |
|
ctx.strokeStyle = series.color; |
|
var fillStyle = getFillStyle(series.lines, series.color, 0, plotHeight); |
|
if (fillStyle) { |
|
ctx.fillStyle = fillStyle; |
|
plotLineArea(series.datapoints, series.xaxis, series.yaxis); |
|
} |
|
|
|
if (lw > 0) |
|
plotLine(series.datapoints, 0, 0, series.xaxis, series.yaxis); |
|
ctx.restore(); |
|
} |
|
|
|
function drawSeriesPoints(series) { |
|
function plotPoints(datapoints, radius, fillStyle, offset, shadow, axisx, axisy, symbol) { |
|
var points = datapoints.points, ps = datapoints.pointsize; |
|
|
|
for (var i = 0; i < points.length; i += ps) { |
|
var x = points[i], y = points[i + 1]; |
|
if (x == null || x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max) |
|
continue; |
|
|
|
ctx.beginPath(); |
|
x = axisx.p2c(x); |
|
y = axisy.p2c(y) + offset; |
|
if (symbol == "circle") |
|
ctx.arc(x, y, radius, 0, shadow ? Math.PI : Math.PI * 2, false); |
|
else |
|
symbol(ctx, x, y, radius, shadow); |
|
ctx.closePath(); |
|
|
|
if (fillStyle) { |
|
ctx.fillStyle = fillStyle; |
|
ctx.fill(); |
|
} |
|
ctx.stroke(); |
|
} |
|
} |
|
|
|
ctx.save(); |
|
ctx.translate(plotOffset.left, plotOffset.top); |
|
|
|
var lw = series.points.lineWidth, |
|
sw = series.shadowSize, |
|
radius = series.points.radius, |
|
symbol = series.points.symbol; |
|
|
|
// If the user sets the line width to 0, we change it to a very |
|
// small value. A line width of 0 seems to force the default of 1. |
|
// Doing the conditional here allows the shadow setting to still be |
|
// optional even with a lineWidth of 0. |
|
|
|
if( lw == 0 ) |
|
lw = 0.0001; |
|
|
|
if (lw > 0 && sw > 0) { |
|
// draw shadow in two steps |
|
var w = sw / 2; |
|
ctx.lineWidth = w; |
|
ctx.strokeStyle = "rgba(0,0,0,0.1)"; |
|
plotPoints(series.datapoints, radius, null, w + w/2, true, |
|
series.xaxis, series.yaxis, symbol); |
|
|
|
ctx.strokeStyle = "rgba(0,0,0,0.2)"; |
|
plotPoints(series.datapoints, radius, null, w/2, true, |
|
series.xaxis, series.yaxis, symbol); |
|
} |
|
|
|
ctx.lineWidth = lw; |
|
ctx.strokeStyle = series.color; |
|
plotPoints(series.datapoints, radius, |
|
getFillStyle(series.points, series.color), 0, false, |
|
series.xaxis, series.yaxis, symbol); |
|
ctx.restore(); |
|
} |
|
|
|
function drawBar(x, y, b, barLeft, barRight, fillStyleCallback, axisx, axisy, c, horizontal, lineWidth) { |
|
var left, right, bottom, top, |
|
drawLeft, drawRight, drawTop, drawBottom, |
|
tmp; |
|
|
|
// in horizontal mode, we start the bar from the left |
|
// instead of from the bottom so it appears to be |
|
// horizontal rather than vertical |
|
if (horizontal) { |
|
drawBottom = drawRight = drawTop = true; |
|
drawLeft = false; |
|
left = b; |
|
right = x; |
|
top = y + barLeft; |
|
bottom = y + barRight; |
|
|
|
// account for negative bars |
|
if (right < left) { |
|
tmp = right; |
|
right = left; |
|
left = tmp; |
|
drawLeft = true; |
|
drawRight = false; |
|
} |
|
} |
|
else { |
|
drawLeft = drawRight = drawTop = true; |
|
drawBottom = false; |
|
left = x + barLeft; |
|
right = x + barRight; |
|
bottom = b; |
|
top = y; |
|
|
|
// account for negative bars |
|
if (top < bottom) { |
|
tmp = top; |
|
top = bottom; |
|
bottom = tmp; |
|
drawBottom = true; |
|
drawTop = false; |
|
} |
|
} |
|
|
|
// clip |
|
if (right < axisx.min || left > axisx.max || |
|
top < axisy.min || bottom > axisy.max) |
|
return; |
|
|
|
if (left < axisx.min) { |
|
left = axisx.min; |
|
drawLeft = false; |
|
} |
|
|
|
if (right > axisx.max) { |
|
right = axisx.max; |
|
drawRight = false; |
|
} |
|
|
|
if (bottom < axisy.min) { |
|
bottom = axisy.min; |
|
drawBottom = false; |
|
} |
|
|
|
if (top > axisy.max) { |
|
top = axisy.max; |
|
drawTop = false; |
|
} |
|
|
|
left = axisx.p2c(left); |
|
bottom = axisy.p2c(bottom); |
|
right = axisx.p2c(right); |
|
top = axisy.p2c(top); |
|
|
|
// fill the bar |
|
if (fillStyleCallback) { |
|
c.fillStyle = fillStyleCallback(bottom, top); |
|
c.fillRect(left, top, right - left, bottom - top) |
|
} |
|
|
|
// draw outline |
|
if (lineWidth > 0 && (drawLeft || drawRight || drawTop || drawBottom)) { |
|
c.beginPath(); |
|
|
|
// FIXME: inline moveTo is buggy with excanvas |
|
c.moveTo(left, bottom); |
|
if (drawLeft) |
|
c.lineTo(left, top); |
|
else |
|
c.moveTo(left, top); |
|
if (drawTop) |
|
c.lineTo(right, top); |
|
else |
|
c.moveTo(right, top); |
|
if (drawRight) |
|
c.lineTo(right, bottom); |
|
else |
|
c.moveTo(right, bottom); |
|
if (drawBottom) |
|
c.lineTo(left, bottom); |
|
else |
|
c.moveTo(left, bottom); |
|
c.stroke(); |
|
} |
|
} |
|
|
|
function drawSeriesBars(series) { |
|
function plotBars(datapoints, barLeft, barRight, fillStyleCallback, axisx, axisy) { |
|
var points = datapoints.points, ps = datapoints.pointsize; |
|
|
|
for (var i = 0; i < points.length; i += ps) { |
|
if (points[i] == null) |
|
continue; |
|
drawBar(points[i], points[i + 1], points[i + 2], barLeft, barRight, fillStyleCallback, axisx, axisy, ctx, series.bars.horizontal, series.bars.lineWidth); |
|
} |
|
} |
|
|
|
ctx.save(); |
|
ctx.translate(plotOffset.left, plotOffset.top); |
|
|
|
// FIXME: figure out a way to add shadows (for instance along the right edge) |
|
ctx.lineWidth = series.bars.lineWidth; |
|
ctx.strokeStyle = series.color; |
|
|
|
var barLeft; |
|
|
|
switch (series.bars.align) { |
|
case "left": |
|
barLeft = 0; |
|
break; |
|
case "right": |
|
barLeft = -series.bars.barWidth; |
|
break; |
|
default: |
|
barLeft = -series.bars.barWidth / 2; |
|
} |
|
|
|
var fillStyleCallback = series.bars.fill ? function (bottom, top) { return getFillStyle(series.bars, series.color, bottom, top); } : null; |
|
plotBars(series.datapoints, barLeft, barLeft + series.bars.barWidth, fillStyleCallback, series.xaxis, series.yaxis); |
|
ctx.restore(); |
|
} |
|
|
|
function getFillStyle(filloptions, seriesColor, bottom, top) { |
|
var fill = filloptions.fill; |
|
if (!fill) |
|
return null; |
|
|
|
if (filloptions.fillColor) |
|
return getColorOrGradient(filloptions.fillColor, bottom, top, seriesColor); |
|
|
|
var c = $.color.parse(seriesColor); |
|
c.a = typeof fill == "number" ? fill : 0.4; |
|
c.normalize(); |
|
return c.toString(); |
|
} |
|
|
|
function insertLegend() { |
|
|
|
if (options.legend.container != null) { |
|
$(options.legend.container).html(""); |
|
} else { |
|
placeholder.find(".legend").remove(); |
|
} |
|
|
|
if (!options.legend.show) { |
|
return; |
|
} |
|
|
|
var fragments = [], entries = [], rowStarted = false, |
|
lf = options.legend.labelFormatter, s, label; |
|
|
|
// Build a list of legend entries, with each having a label and a color |
|
|
|
for (var i = 0; i < series.length; ++i) { |
|
s = series[i]; |
|
if (s.label) { |
|
label = lf ? lf(s.label, s) : s.label; |
|
if (label) { |
|
entries.push({ |
|
label: label, |
|
color: s.color |
|
}); |
|
} |
|
} |
|
} |
|
|
|
// Sort the legend using either the default or a custom comparator |
|
|
|
if (options.legend.sorted) { |
|
if ($.isFunction(options.legend.sorted)) { |
|
entries.sort(options.legend.sorted); |
|
} else if (options.legend.sorted == "reverse") { |
|
entries.reverse(); |
|
} else { |
|
var ascending = options.legend.sorted != "descending"; |
|
entries.sort(function(a, b) { |
|
return a.label == b.label ? 0 : ( |
|
(a.label < b.label) != ascending ? 1 : -1 // Logical XOR |
|
); |
|
}); |
|
} |
|
} |
|
|
|
// Generate markup for the list of entries, in their final order |
|
|
|
for (var i = 0; i < entries.length; ++i) { |
|
|
|
var entry = entries[i]; |
|
|
|
if (i % options.legend.noColumns == 0) { |
|
if (rowStarted) |
|
fragments.push('</tr>'); |
|
fragments.push('<tr>'); |
|
rowStarted = true; |
|
} |
|
|
|
fragments.push( |
|
'<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>' + |
|
'<td class="legendLabel">' + entry.label + '</td>' |
|
); |
|
} |
|
|
|
if (rowStarted) |
|
fragments.push('</tr>'); |
|
|
|
if (fragments.length == 0) |
|
return; |
|
|
|
var table = '<table style="font-size:smaller;color:' + options.grid.color + '">' + fragments.join("") + '</table>'; |
|
if (options.legend.container != null) |
|
$(options.legend.container).html(table); |
|
else { |
|
var pos = "", |
|
p = options.legend.position, |
|
m = options.legend.margin; |
|
if (m[0] == null) |
|
m = [m, m]; |
|
if (p.charAt(0) == "n") |
|
pos += 'top:' + (m[1] + plotOffset.top) + 'px;'; |
|
else if (p.charAt(0) == "s") |
|
pos += 'bottom:' + (m[1] + plotOffset.bottom) + 'px;'; |
|
if (p.charAt(1) == "e") |
|
pos += 'right:' + (m[0] + plotOffset.right) + 'px;'; |
|
else if (p.charAt(1) == "w") |
|
pos += 'left:' + (m[0] + plotOffset.left) + 'px;'; |
|
var legend = $('<div class="legend">' + table.replace('style="', 'style="position:absolute;' + pos +';') + '</div>').appendTo(placeholder); |
|
if (options.legend.backgroundOpacity != 0.0) { |
|
// put in the transparent background |
|
// separately to avoid blended labels and |
|
// label boxes |
|
var c = options.legend.backgroundColor; |
|
if (c == null) { |
|
c = options.grid.backgroundColor; |
|
if (c && typeof c == "string") |
|
c = $.color.parse(c); |
|
else |
|
c = $.color.extract(legend, 'background-color'); |
|
c.a = 1; |
|
c = c.toString(); |
|
} |
|
var div = legend.children(); |
|
$('<div style="position:absolute;width:' + div.width() + 'px;height:' + div.height() + 'px;' + pos +'background-color:' + c + ';"> </div>').prependTo(legend).css('opacity', options.legend.backgroundOpacity); |
|
} |
|
} |
|
} |
|
|
|
|
|
// interactive features |
|
|
|
var highlights = [], |
|
redrawTimeout = null; |
|
|
|
// returns the data item the mouse is over, or null if none is found |
|
function findNearbyItem(mouseX, mouseY, seriesFilter) { |
|
var maxDistance = options.grid.mouseActiveRadius, |
|
smallestDistance = maxDistance * maxDistance + 1, |
|
item = null, foundPoint = false, i, j, ps; |
|
|
|
for (i = series.length - 1; i >= 0; --i) { |
|
if (!seriesFilter(series[i])) |
|
continue; |
|
|
|
var s = series[i], |
|
axisx = s.xaxis, |
|
axisy = s.yaxis, |
|
points = s.datapoints.points, |
|
mx = axisx.c2p(mouseX), // precompute some stuff to make the loop faster |
|
my = axisy.c2p(mouseY), |
|
maxx = maxDistance / axisx.scale, |
|
maxy = maxDistance / axisy.scale; |
|
|
|
ps = s.datapoints.pointsize; |
|
// with inverse transforms, we can't use the maxx/maxy |
|
// optimization, sadly |
|
if (axisx.options.inverseTransform) |
|
maxx = Number.MAX_VALUE; |
|
if (axisy.options.inverseTransform) |
|
maxy = Number.MAX_VALUE; |
|
|
|
if (s.lines.show || s.points.show) { |
|
for (j = 0; j < points.length; j += ps) { |
|
var x = points[j], y = points[j + 1]; |
|
if (x == null) |
|
continue; |
|
|
|
// For points and lines, the cursor must be within a |
|
// certain distance to the data point |
|
if (x - mx > maxx || x - mx < -maxx || |
|
y - my > maxy || y - my < -maxy) |
|
continue; |
|
|
|
// We have to calculate distances in pixels, not in |
|
// data units, because the scales of the axes may be different |
|
var dx = Math.abs(axisx.p2c(x) - mouseX), |
|
dy = Math.abs(axisy.p2c(y) - mouseY), |
|
dist = dx * dx + dy * dy; // we save the sqrt |
|
|
|
// use <= to ensure last point takes precedence |
|
// (last generally means on top of) |
|
if (dist < smallestDistance) { |
|
smallestDistance = dist; |
|
item = [i, j / ps]; |
|
} |
|
} |
|
} |
|
|
|
if (s.bars.show && !item) { // no other point can be nearby |
|
|
|
var barLeft, barRight; |
|
|
|
switch (s.bars.align) { |
|
case "left": |
|
barLeft = 0; |
|
break; |
|
case "right": |
|
barLeft = -s.bars.barWidth; |
|
break; |
|
default: |
|
barLeft = -s.bars.barWidth / 2; |
|
} |
|
|
|
barRight = barLeft + s.bars.barWidth; |
|
|
|
for (j = 0; j < points.length; j += ps) { |
|
var x = points[j], y = points[j + 1], b = points[j + 2]; |
|
if (x == null) |
|
continue; |
|
|
|
// for a bar graph, the cursor must be inside the bar |
|
if (series[i].bars.horizontal ? |
|
(mx <= Math.max(b, x) && mx >= Math.min(b, x) && |
|
my >= y + barLeft && my <= y + barRight) : |
|
(mx >= x + barLeft && mx <= x + barRight && |
|
my >= Math.min(b, y) && my <= Math.max(b, y))) |
|
item = [i, j / ps]; |
|
} |
|
} |
|
} |
|
|
|
if (item) { |
|
i = item[0]; |
|
j = item[1]; |
|
ps = series[i].datapoints.pointsize; |
|
|
|
return { datapoint: series[i].datapoints.points.slice(j * ps, (j + 1) * ps), |
|
dataIndex: j, |
|
series: series[i], |
|
seriesIndex: i }; |
|
} |
|
|
|
return null; |
|
} |
|
|
|
function onMouseMove(e) { |
|
if (options.grid.hoverable) |
|
triggerClickHoverEvent("plothover", e, |
|
function (s) { return s["hoverable"] != false; }); |
|
} |
|
|
|
function onMouseLeave(e) { |
|
if (options.grid.hoverable) |
|
triggerClickHoverEvent("plothover", e, |
|
function (s) { return false; }); |
|
} |
|
|
|
function onClick(e) { |
|
triggerClickHoverEvent("plotclick", e, |
|
function (s) { return s["clickable"] != false; }); |
|
} |
|
|
|
// trigger click or hover event (they send the same parameters |
|
// so we share their code) |
|
function triggerClickHoverEvent(eventname, event, seriesFilter) { |
|
var offset = eventHolder.offset(), |
|
canvasX = event.pageX - offset.left - plotOffset.left, |
|
canvasY = event.pageY - offset.top - plotOffset.top, |
|
pos = canvasToAxisCoords({ left: canvasX, top: canvasY }); |
|
|
|
pos.pageX = event.pageX; |
|
pos.pageY = event.pageY; |
|
|
|
var item = findNearbyItem(canvasX, canvasY, seriesFilter); |
|
|
|
if (item) { |
|
// fill in mouse pos for any listeners out there |
|
item.pageX = parseInt(item.series.xaxis.p2c(item.datapoint[0]) + offset.left + plotOffset.left, 10); |
|
item.pageY = parseInt(item.series.yaxis.p2c(item.datapoint[1]) + offset.top + plotOffset.top, 10); |
|
} |
|
|
|
if (options.grid.autoHighlight) { |
|
// clear auto-highlights |
|
for (var i = 0; i < highlights.length; ++i) { |
|
var h = highlights[i]; |
|
if (h.auto == eventname && |
|
!(item && h.series == item.series && |
|
h.point[0] == item.datapoint[0] && |
|
h.point[1] == item.datapoint[1])) |
|
unhighlight(h.series, h.point); |
|
} |
|
|
|
if (item) |
|
highlight(item.series, item.datapoint, eventname); |
|
} |
|
|
|
placeholder.trigger(eventname, [ pos, item ]); |
|
} |
|
|
|
function triggerRedrawOverlay() { |
|
var t = options.interaction.redrawOverlayInterval; |
|
if (t == -1) { // skip event queue |
|
drawOverlay(); |
|
return; |
|
} |
|
|
|
if (!redrawTimeout) |
|
redrawTimeout = setTimeout(drawOverlay, t); |
|
} |
|
|
|
function drawOverlay() { |
|
redrawTimeout = null; |
|
|
|
// draw highlights |
|
octx.save(); |
|
overlay.clear(); |
|
octx.translate(plotOffset.left, plotOffset.top); |
|
|
|
var i, hi; |
|
for (i = 0; i < highlights.length; ++i) { |
|
hi = highlights[i]; |
|
|
|
if (hi.series.bars.show) |
|
drawBarHighlight(hi.series, hi.point); |
|
else |
|
drawPointHighlight(hi.series, hi.point); |
|
} |
|
octx.restore(); |
|
|
|
executeHooks(hooks.drawOverlay, [octx]); |
|
} |
|
|
|
function highlight(s, point, auto) { |
|
if (typeof s == "number") |
|
s = series[s]; |
|
|
|
if (typeof point == "number") { |
|
var ps = s.datapoints.pointsize; |
|
point = s.datapoints.points.slice(ps * point, ps * (point + 1)); |
|
} |
|
|
|
var i = indexOfHighlight(s, point); |
|
if (i == -1) { |
|
highlights.push({ series: s, point: point, auto: auto }); |
|
|
|
triggerRedrawOverlay(); |
|
} |
|
else if (!auto) |
|
highlights[i].auto = false; |
|
} |
|
|
|
function unhighlight(s, point) { |
|
if (s == null && point == null) { |
|
highlights = []; |
|
triggerRedrawOverlay(); |
|
return; |
|
} |
|
|
|
if (typeof s == "number") |
|
s = series[s]; |
|
|
|
if (typeof point == "number") { |
|
var ps = s.datapoints.pointsize; |
|
point = s.datapoints.points.slice(ps * point, ps * (point + 1)); |
|
} |
|
|
|
var i = indexOfHighlight(s, point); |
|
if (i != -1) { |
|
highlights.splice(i, 1); |
|
|
|
triggerRedrawOverlay(); |
|
} |
|
} |
|
|
|
function indexOfHighlight(s, p) { |
|
for (var i = 0; i < highlights.length; ++i) { |
|
var h = highlights[i]; |
|
if (h.series == s && h.point[0] == p[0] |
|
&& h.point[1] == p[1]) |
|
return i; |
|
} |
|
return -1; |
|
} |
|
|
|
function drawPointHighlight(series, point) { |
|
var x = point[0], y = point[1], |
|
axisx = series.xaxis, axisy = series.yaxis, |
|
highlightColor = (typeof series.highlightColor === "string") ? series.highlightColor : $.color.parse(series.color).scale('a', 0.5).toString(); |
|
|
|
if (x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max) |
|
return; |
|
|
|
var pointRadius = series.points.radius + series.points.lineWidth / 2; |
|
octx.lineWidth = pointRadius; |
|
octx.strokeStyle = highlightColor; |
|
var radius = 1.5 * pointRadius; |
|
x = axisx.p2c(x); |
|
y = axisy.p2c(y); |
|
|
|
octx.beginPath(); |
|
if (series.points.symbol == "circle") |
|
octx.arc(x, y, radius, 0, 2 * Math.PI, false); |
|
else |
|
series.points.symbol(octx, x, y, radius, false); |
|
octx.closePath(); |
|
octx.stroke(); |
|
} |
|
|
|
function drawBarHighlight(series, point) { |
|
var highlightColor = (typeof series.highlightColor === "string") ? series.highlightColor : $.color.parse(series.color).scale('a', 0.5).toString(), |
|
fillStyle = highlightColor, |
|
barLeft; |
|
|
|
switch (series.bars.align) { |
|
case "left": |
|
barLeft = 0; |
|
break; |
|
case "right": |
|
barLeft = -series.bars.barWidth; |
|
break; |
|
default: |
|
barLeft = -series.bars.barWidth / 2; |
|
} |
|
|
|
octx.lineWidth = series.bars.lineWidth; |
|
octx.strokeStyle = highlightColor; |
|
|
|
drawBar(point[0], point[1], point[2] || 0, barLeft, barLeft + series.bars.barWidth, |
|
function () { return fillStyle; }, series.xaxis, series.yaxis, octx, series.bars.horizontal, series.bars.lineWidth); |
|
} |
|
|
|
function getColorOrGradient(spec, bottom, top, defaultColor) { |
|
if (typeof spec == "string") |
|
return spec; |
|
else { |
|
// assume this is a gradient spec; IE currently only |
|
// supports a simple vertical gradient properly, so that's |
|
// what we support too |
|
var gradient = ctx.createLinearGradient(0, top, 0, bottom); |
|
|
|
for (var i = 0, l = spec.colors.length; i < l; ++i) { |
|
var c = spec.colors[i]; |
|
if (typeof c != "string") { |
|
var co = $.color.parse(defaultColor); |
|
if (c.brightness != null) |
|
co = co.scale('rgb', c.brightness); |
|
if (c.opacity != null) |
|
co.a *= c.opacity; |
|
c = co.toString(); |
|
} |
|
gradient.addColorStop(i / (l - 1), c); |
|
} |
|
|
|
return gradient; |
|
} |
|
} |
|
} |
|
|
|
// Add the plot function to the top level of the jQuery object |
|
|
|
$.plot = function(placeholder, data, options) { |
|
//var t0 = new Date(); |
|
var plot = new Plot($(placeholder), data, options, $.plot.plugins); |
|
//(window.console ? console.log : alert)("time used (msecs): " + ((new Date()).getTime() - t0.getTime())); |
|
return plot; |
|
}; |
|
|
|
$.plot.version = "0.8.3"; |
|
|
|
$.plot.plugins = []; |
|
|
|
// Also add the plot function as a chainable property |
|
|
|
$.fn.plot = function(data, options) { |
|
return this.each(function() { |
|
$.plot(this, data, options); |
|
}); |
|
}; |
|
|
|
// round to nearby lower multiple of base |
|
function floorInBase(n, base) { |
|
return base * Math.floor(n / base); |
|
} |
|
|
|
})(jQuery);
|
|
|