--- /dev/null
+/* Javascript plotting library for jQuery, version 0.8.2.
+
+Copyright (c) 2007-2013 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+*/
+
+// first an inline dependency, jquery.colorhelpers.js, we inline it here
+// for convenience
+
+/* Plugin for jQuery for working with colors.
+ *
+ * Version 1.1.
+ *
+ * Inspiration from jQuery color animation plugin by John Resig.
+ *
+ * Released under the MIT license by Ole Laursen, October 2009.
+ *
+ * Examples:
+ *
+ * $.color.parse("#fff").scale('rgb', 0.25).add('a', -0.5).toString()
+ * var c = $.color.extract($("#mydiv"), 'background-color');
+ * console.log(c.r, c.g, c.b, c.a);
+ * $.color.make(100, 50, 25, 0.4).toString() // returns "rgba(100,50,25,0.4)"
+ *
+ * Note that .scale() and .add() return the same modified object
+ * instead of making a new one.
+ *
+ * V. 1.1: Fix error handling so e.g. parsing an empty string does
+ * produce a color rather than just crashing.
+ */
+(function($){$.color={};$.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=$.trim(str).toLowerCase();if(name=="transparent")return m(255,255,255,0);else{res=lookupColors[name]||[0,0,0];return m(res[0],res[1],res[2])}};var lookupColors={aqua:[0,255,255],azure:[240,255,255],beige:[245,245,220],black:[0,0,0],blue:[0,0,255],brown:[165,42,42],cyan:[0,255,255],darkblue:[0,0,139],darkcyan:[0,139,139],darkgrey:[169,169,169],darkgreen:[0,100,0],darkkhaki:[189,183,107],darkmagenta:[139,0,139],darkolivegreen:[85,107,47],darkorange:[255,140,0],darkorchid:[153,50,204],darkred:[139,0,0],darksalmon:[233,150,122],darkviolet:[148,0,211],fuchsia:[255,0,255],gold:[255,215,0],green:[0,128,0],indigo:[75,0,130],khaki:[240,230,140],lightblue:[173,216,230],lightcyan:[224,255,255],lightgreen:[144,238,144],lightgrey:[211,211,211],lightpink:[255,182,193],lightyellow:[255,255,224],lime:[0,255,0],magenta:[255,0,255],maroon:[128,0,0],navy:[0,0,128],olive:[128,128,0],orange:[255,165,0],pink:[255,192,203],purple:[128,0,128],violet:[128,0,128],red:[255,0,0],silver:[192,192,192],white:[255,255,255],yellow:[255,255,0]}})(jQuery);
+
+// the actual Flot code
+(function($) {
+
+ // Cache the prototype hasOwnProperty for faster access
+
+ var hasOwnProperty = Object.prototype.hasOwnProperty;
+
+ ///////////////////////////////////////////////////////////////////////////
+ // The Canvas object is a wrapper around an HTML5 <canvas> tag.
+ //
+ // @constructor
+ // @param {string} cls List of classes to apply to the canvas.
+ // @param {element} container Element onto which to append the canvas.
+ //
+ // Requiring a container is a little iffy, but unfortunately canvas
+ // operations don't work unless the canvas is attached to the DOM.
+
+ function Canvas(cls, container) {
+
+ var element = container.children("." + cls)[0];
+
+ if (element == null) {
+
+ element = document.createElement("canvas");
+ element.className = cls;
+
+ $(element).css({ direction: "ltr", position: "absolute", left: 0, top: 0 })
+ .appendTo(container);
+
+ // If HTML5 Canvas isn't available, fall back to [Ex|Flash]canvas
+
+ if (!element.getContext) {
+ if (window.G_vmlCanvasManager) {
+ element = window.G_vmlCanvasManager.initElement(element);
+ } else {
+ 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.");
+ }
+ }
+ }
+
+ this.element = element;
+
+ var context = this.context = element.getContext("2d");
+
+ // Determine the screen's ratio of physical to device-independent
+ // pixels. This is the ratio between the canvas width that the browser
+ // advertises and the number of pixels actually present in that space.
+
+ // The iPhone 4, for example, has a device-independent width of 320px,
+ // but its screen is actually 640px wide. It therefore has a pixel
+ // ratio of 2, while most normal devices have a ratio of 1.
+
+ var devicePixelRatio = window.devicePixelRatio || 1,
+ backingStoreRatio =
+ context.webkitBackingStorePixelRatio ||
+ context.mozBackingStorePixelRatio ||
+ context.msBackingStorePixelRatio ||
+ context.oBackingStorePixelRatio ||
+ context.backingStorePixelRatio || 1;
+
+ this.pixelRatio = devicePixelRatio / backingStoreRatio;
+
+ // Size the canvas to match the internal dimensions of its container
+
+ this.resize(container.width(), container.height());
+
+ // Collection of HTML div layers for text overlaid onto the canvas
+
+ this.textContainer = null;
+ this.text = {};
+
+ // Cache of text fragments and metrics, so we can avoid expensively
+ // re-calculating them when the plot is re-rendered in a loop.
+
+ this._textCache = {};
+ }
+
+ // Resizes the canvas to the given dimensions.
+ //
+ // @param {number} width New width of the canvas, in pixels.
+ // @param {number} width New height of the canvas, in pixels.
+
+ Canvas.prototype.resize = function(width, height) {
+
+ if (width <= 0 || height <= 0) {
+ throw new Error("Invalid dimensions for plot, width = " + width + ", height = " + height);
+ }
+
+ var element = this.element,
+ context = this.context,
+ pixelRatio = this.pixelRatio;
+
+ // Resize the canvas, increasing its density based on the display's
+ // pixel ratio; basically giving it more pixels without increasing the
+ // size of its element, to take advantage of the fact that retina
+ // displays have that many more pixels in the same advertised space.
+
+ // Resizing should reset the state (excanvas seems to be buggy though)
+
+ if (this.width != width) {
+ element.width = width * pixelRatio;
+ element.style.width = width + "px";
+ this.width = width;
+ }
+
+ if (this.height != height) {
+ element.height = height * pixelRatio;
+ element.style.height = height + "px";
+ this.height = height;
+ }
+
+ // Save the context, so we can reset in case we get replotted. The
+ // restore ensure that we're really back at the initial state, and
+ // should be safe even if we haven't saved the initial state yet.
+
+ context.restore();
+ context.save();
+
+ // Scale the coordinate space to match the display density; so even though we
+ // may have twice as many pixels, we still want lines and other drawing to
+ // appear at the same size; the extra pixels will just make them crisper.
+
+ context.scale(pixelRatio, pixelRatio);
+ };
+
+ // Clears the entire canvas area, not including any overlaid HTML text
+
+ Canvas.prototype.clear = function() {
+ this.context.clearRect(0, 0, this.width, this.height);
+ };
+
+ // Finishes rendering the canvas, including managing the text overlay.
+
+ Canvas.prototype.render = function() {
+
+ var cache = this._textCache;
+
+ // For each text layer, add elements marked as active that haven't
+ // already been rendered, and remove those that are no longer active.
+
+ for (var layerKey in cache) {
+ if (hasOwnProperty.call(cache, layerKey)) {
+
+ var layer = this.getTextLayer(layerKey),
+ layerCache = cache[layerKey];
+
+ layer.hide();
+
+ for (var styleKey in layerCache) {
+ if (hasOwnProperty.call(layerCache, styleKey)) {
+ var styleCache = layerCache[styleKey];
+ for (var key in styleCache) {
+ if (hasOwnProperty.call(styleCache, key)) {
+
+ var positions = styleCache[key].positions;
+
+ for (var i = 0, position; position = positions[i]; i++) {
+ if (position.active) {
+ if (!position.rendered) {
+ layer.append(position.element);
+ position.rendered = true;
+ }
+ } else {
+ positions.splice(i--, 1);
+ if (position.rendered) {
+ position.element.detach();
+ }
+ }
+ }
+
+ if (positions.length == 0) {
+ delete styleCache[key];
+ }
+ }
+ }
+ }
+ }
+
+ layer.show();
+ }
+ }
+ };
+
+ // Creates (if necessary) and returns the text overlay container.
+ //
+ // @param {string} classes String of space-separated CSS classes used to
+ // uniquely identify the text layer.
+ // @return {object} The jQuery-wrapped text-layer div.
+
+ Canvas.prototype.getTextLayer = function(classes) {
+
+ var layer = this.text[classes];
+
+ // Create the text layer if it doesn't exist
+
+ if (layer == null) {
+
+ // Create the text layer container, if it doesn't exist
+
+ if (this.textContainer == null) {
+ this.textContainer = $("<div class='flot-text'></div>")
+ .css({
+ position: "absolute",
+ top: 0,
+ left: 0,
+ bottom: 0,
+ right: 0,
+ 'font-size': "smaller",
+ color: "#545454"
+ })
+ .insertAfter(this.element);
+ }
+
+ layer = this.text[classes] = $("<div></div>")
+ .addClass(classes)
+ .css({
+ position: "absolute",
+ top: 0,
+ left: 0,
+ bottom: 0,
+ right: 0
+ })
+ .appendTo(this.textContainer);
+ }
+
+ return layer;
+ };
+
+ // Creates (if necessary) and returns a text info object.
+ //
+ // The object looks like this:
+ //
+ // {
+ // width: Width of the text's wrapper div.
+ // height: Height of the text's wrapper div.
+ // element: The jQuery-wrapped HTML div containing the text.
+ // positions: Array of positions at which this text is drawn.
+ // }
+ //
+ // The positions array contains objects that look like this:
+ //
+ // {
+ // active: Flag indicating whether the text should be visible.
+ // rendered: Flag indicating whether the text is currently visible.
+ // element: The jQuery-wrapped HTML div containing the text.
+ // x: X coordinate at which to draw the text.
+ // y: Y coordinate at which to draw the text.
+ // }
+ //
+ // Each position after the first receives a clone of the original element.
+ //
+ // The idea is that that the width, height, and general 'identity' of the
+ // text is constant no matter where it is placed; the placements are a
+ // secondary property.
+ //
+ // Canvas maintains a cache of recently-used text info objects; getTextInfo
+ // either returns the cached element or creates a new entry.
+ //
+ // @param {string} layer A string of space-separated CSS classes uniquely
+ // identifying the layer containing this text.
+ // @param {string} text Text string to retrieve info for.
+ // @param {(string|object)=} font Either a string of space-separated CSS
+ // classes or a font-spec object, defining the text's font and style.
+ // @param {number=} angle Angle at which to rotate the text, in degrees.
+ // Angle is currently unused, it will be implemented in the future.
+ // @param {number=} width Maximum width of the text before it wraps.
+ // @return {object} a text info object.
+
+ Canvas.prototype.getTextInfo = function(layer, text, font, angle, width) {
+
+ var textStyle, layerCache, styleCache, info;
+
+ // Cast the value to a string, in case we were given a number or such
+
+ text = "" + text;
+
+ // If the font is a font-spec object, generate a CSS font definition
+
+ if (typeof font === "object") {
+ textStyle = font.style + " " + font.variant + " " + font.weight + " " + font.size + "px/" + font.lineHeight + "px " + font.family;
+ } else {
+ textStyle = font;
+ }
+
+ // Retrieve (or create) the cache for the text's layer and styles
+
+ layerCache = this._textCache[layer];
+
+ if (layerCache == null) {
+ layerCache = this._textCache[layer] = {};
+ }
+
+ styleCache = layerCache[textStyle];
+
+ if (styleCache == null) {
+ styleCache = layerCache[textStyle] = {};
+ }
+
+ info = styleCache[text];
+
+ // If we can't find a matching element in our cache, create a new one
+
+ if (info == null) {
+
+ var element = $("<div></div>").html(text)
+ .css({
+ position: "absolute",
+ 'max-width': width,
+ top: -9999
+ })
+ .appendTo(this.getTextLayer(layer));
+
+ if (typeof font === "object") {
+ element.css({
+ font: textStyle,
+ color: font.color
+ });
+ } else if (typeof font === "string") {
+ element.addClass(font);
+ }
+
+ info = styleCache[text] = {
+ width: element.outerWidth(true),
+ height: element.outerHeight(true),
+ element: element,
+ positions: []
+ };
+
+ element.detach();
+ }
+
+ return info;
+ };
+
+ // Adds a text string to the canvas text overlay.
+ //
+ // The text isn't drawn immediately; it is marked as rendering, which will
+ // result in its addition to the canvas on the next render pass.
+ //
+ // @param {string} layer A string of space-separated CSS classes uniquely
+ // identifying the layer containing this text.
+ // @param {number} x X coordinate at which to draw the text.
+ // @param {number} y Y coordinate at which to draw the text.
+ // @param {string} text Text string to draw.
+ // @param {(string|object)=} font Either a string of space-separated CSS
+ // classes or a font-spec object, defining the text's font and style.
+ // @param {number=} angle Angle at which to rotate the text, in degrees.
+ // Angle is currently unused, it will be implemented in the future.
+ // @param {number=} width Maximum width of the text before it wraps.
+ // @param {string=} halign Horizontal alignment of the text; either "left",
+ // "center" or "right".
+ // @param {string=} valign Vertical alignment of the text; either "top",
+ // "middle" or "bottom".
+
+ Canvas.prototype.addText = function(layer, x, y, text, font, angle, width, halign, valign) {
+
+ var info = this.getTextInfo(layer, text, font, angle, width),
+ positions = info.positions;
+
+ // Tweak the div's position to match the text's alignment
+
+ if (halign == "center") {
+ x -= info.width / 2;
+ } else if (halign == "right") {
+ x -= info.width;
+ }
+
+ if (valign == "middle") {
+ y -= info.height / 2;
+ } else if (valign == "bottom") {
+ y -= info.height;
+ }
+
+ // Determine whether this text already exists at this position.
+ // If so, mark it for inclusion in the next render pass.
+
+ for (var i = 0, position; position = positions[i]; i++) {
+ if (position.x == x && position.y == y) {
+ position.active = true;
+ return;
+ }
+ }
+
+ // If the text doesn't exist at this position, create a new entry
+
+ // For the very first position we'll re-use the original element,
+ // while for subsequent ones we'll clone it.
+
+ position = {
+ active: true,
+ rendered: false,
+ element: positions.length ? info.element.clone() : info.element,
+ x: x,
+ y: y
+ };
+
+ positions.push(position);
+
+ // Move the element to its final position within the container
+
+ position.element.css({
+ top: Math.round(y),
+ left: Math.round(x),
+ 'text-align': halign // In case the text wraps
+ });
+ };
+
+ // Removes one or more text strings from the canvas text overlay.
+ //
+ // If no parameters are given, all text within the layer is removed.
+ //
+ // Note that the text is not immediately removed; it is simply marked as
+ // inactive, which will result in its removal on the next render pass.
+ // This avoids the performance penalty for 'clear and redraw' behavior,
+ // where we potentially get rid of all text on a layer, but will likely
+ // add back most or all of it later, as when redrawing axes, for example.
+ //
+ // @param {string} layer A string of space-separated CSS classes uniquely
+ // identifying the layer containing this text.
+ // @param {number=} x X coordinate of the text.
+ // @param {number=} y Y coordinate of the text.
+ // @param {string=} text Text string to remove.
+ // @param {(string|object)=} font Either a string of space-separated CSS
+ // classes or a font-spec object, defining the text's font and style.
+ // @param {number=} angle Angle at which the text is rotated, in degrees.
+ // Angle is currently unused, it will be implemented in the future.
+
+ Canvas.prototype.removeText = function(layer, x, y, text, font, angle) {
+ if (text == null) {
+ var layerCache = this._textCache[layer];
+ if (layerCache != null) {
+ for (var styleKey in layerCache) {
+ if (hasOwnProperty.call(layerCache, styleKey)) {
+ var styleCache = layerCache[styleKey];
+ for (var key in styleCache) {
+ if (hasOwnProperty.call(styleCache, key)) {
+ var positions = styleCache[key].positions;
+ for (var i = 0, position; position = positions[i]; i++) {
+ position.active = false;
+ }
+ }
+ }
+ }
+ }
+ }
+ } 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";
+ }
+ if (options.y2axis) {
+ options.yaxes[1] = $.extend(true, {}, options.yaxis, options.y2axis);
+ options.yaxes[1].position = "right";
+ }
+ 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.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) {
+ var lastTick = axis.ticks[axis.ticks.length - 1];
+ if (axis.direction === "x") {
+ margins.left = Math.max(margins.left, axis.labelWidth / 2);
+ if (lastTick.v <= axis.max) {
+ margins.right = Math.max(margins.right, axis.labelWidth / 2);
+ }
+ } else {
+ margins.bottom = Math.max(margins.bottom, axis.labelHeight / 2);
+ if (lastTick.v <= axis.max) {
+ 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;
+ }
+ }
+
+ // init axes
+ $.each(axes, function (_, axis) {
+ axis.show = axis.options.show;
+ if (axis.show == null)
+ axis.show = axis.used; // by default an axis is visible if it's got data
+
+ axis.reserveSpace = axis.show || axis.options.reserveSpace;
+
+ setRange(axis);
+ });
+
+ if (showGrid) {
+
+ var allocatedAxes = $.grep(axes, function (axis) { return 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, but since so many people use this
+ // we'll add an especially friendly make sure they remembered to include 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);
+
+ if (xrange.from == xrange.to && yrange.from == yrange.to)
+ continue;
+
+ // then draw
+ xrange.from = xrange.axis.p2c(xrange.from);
+ xrange.to = xrange.axis.p2c(xrange.to);
+ yrange.from = yrange.axis.p2c(yrange.from);
+ yrange.to = yrange.axis.p2c(yrange.to);
+
+ if (xrange.from == xrange.to || yrange.from == yrange.to) {
+ // draw line
+ ctx.beginPath();
+ ctx.strokeStyle = m.color || options.grid.markingsColor;
+ ctx.lineWidth = m.lineWidth || options.grid.markingsLineWidth;
+ ctx.moveTo(xrange.from, yrange.from);
+ ctx.lineTo(xrange.to, yrange.to);
+ ctx.stroke();
+ }
+ else {
+ // fill area
+ 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 = "0.8.2";
+
+ $.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);
Code Review / stor4nfv.git / blobdiff