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-/*! Javascript plotting library for jQuery, v. 0.7.
- *
- * Released under the MIT license by IOLA, December 2007.
- *
- */
-
-// 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(B){B.color={};B.color.make=function(F,E,C,D){var G={};G.r=F||0;G.g=E||0;G.b=C||0;G.a=D!=null?D:1;G.add=function(J,I){for(var H=0;H<J.length;++H){G[J.charAt(H)]+=I}return G.normalize()};G.scale=function(J,I){for(var H=0;H<J.length;++H){G[J.charAt(H)]*=I}return G.normalize()};G.toString=function(){if(G.a>=1){return"rgb("+[G.r,G.g,G.b].join(",")+")"}else{return"rgba("+[G.r,G.g,G.b,G.a].join(",")+")"}};G.normalize=function(){function H(J,K,I){return K<J?J:(K>I?I:K)}G.r=H(0,parseInt(G.r),255);G.g=H(0,parseInt(G.g),255);G.b=H(0,parseInt(G.b),255);G.a=H(0,G.a,1);return G};G.clone=function(){return B.color.make(G.r,G.b,G.g,G.a)};return G.normalize()};B.color.extract=function(D,C){var E;do{E=D.css(C).toLowerCase();if(E!=""&&E!="transparent"){break}D=D.parent()}while(!B.nodeName(D.get(0),"body"));if(E=="rgba(0, 0, 0, 0)"){E="transparent"}return B.color.parse(E)};B.color.parse=function(F){var E,C=B.color.make;if(E=/rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(F)){return C(parseInt(E[1],10),parseInt(E[2],10),parseInt(E[3],10))}if(E=/rgba\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(F)){return C(parseInt(E[1],10),parseInt(E[2],10),parseInt(E[3],10),parseFloat(E[4]))}if(E=/rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(F)){return C(parseFloat(E[1])*2.55,parseFloat(E[2])*2.55,parseFloat(E[3])*2.55)}if(E=/rgba\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(F)){return C(parseFloat(E[1])*2.55,parseFloat(E[2])*2.55,parseFloat(E[3])*2.55,parseFloat(E[4]))}if(E=/#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(F)){return C(parseInt(E[1],16),parseInt(E[2],16),parseInt(E[3],16))}if(E=/#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(F)){return C(parseInt(E[1]+E[1],16),parseInt(E[2]+E[2],16),parseInt(E[3]+E[3],16))}var D=B.trim(F).toLowerCase();if(D=="transparent"){return C(255,255,255,0)}else{E=A[D]||[0,0,0];return C(E[0],E[1],E[2])}};var A={aqua:[0,255,255],azure:[240,255,255],beige:[245,245,220],black:[0,0,0],blue:[0,0,255],brown:[165,42,42],cyan:[0,255,255],darkblue:[0,0,139],darkcyan:[0,139,139],darkgrey:[169,169,169],darkgreen:[0,100,0],darkkhaki:[189,183,107],darkmagenta:[139,0,139],darkolivegreen:[85,107,47],darkorange:[255,140,0],darkorchid:[153,50,204],darkred:[139,0,0],darksalmon:[233,150,122],darkviolet:[148,0,211],fuchsia:[255,0,255],gold:[255,215,0],green:[0,128,0],indigo:[75,0,130],khaki:[240,230,140],lightblue:[173,216,230],lightcyan:[224,255,255],lightgreen:[144,238,144],lightgrey:[211,211,211],lightpink:[255,182,193],lightyellow:[255,255,224],lime:[0,255,0],magenta:[255,0,255],maroon:[128,0,0],navy:[0,0,128],olive:[128,128,0],orange:[255,165,0],pink:[255,192,203],purple:[128,0,128],violet:[128,0,128],red:[255,0,0],silver:[192,192,192],white:[255,255,255],yellow:[255,255,0]}})(jQuery);
-
-// the actual Flot code
-(function($) {
- 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
- },
- xaxis: {
- show: null, // null = auto-detect, true = always, false = never
- position: "bottom", // or "top"
- mode: null, // null or "time"
- 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
-
- // mode specific options
- tickDecimals: null, // no. of decimals, null means auto
- tickSize: null, // number or [number, "unit"]
- minTickSize: null, // number or [number, "unit"]
- monthNames: null, // list of names of months
- timeformat: null, // format string to use
- twelveHourClock: false // 12 or 24 time in time mode
- },
- 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
- },
- bars: {
- show: false,
- lineWidth: 2, // in pixels
- barWidth: 1, // in units of the x axis
- fill: true,
- fillColor: null,
- align: "left", // or "center"
- horizontal: false
- },
- shadowSize: 3
- },
- 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)"
- 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
- },
- hooks: {}
- },
- canvas = 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},
- canvasWidth = 0, canvasHeight = 0,
- plotWidth = 0, plotHeight = 0,
- hooks = {
- processOptions: [],
- processRawData: [],
- processDatapoints: [],
- 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 canvas; };
- 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),
- top: parseInt(yaxes[axisNumber(point, "y") - 1].p2c(+point.y) + plotOffset.top)
- };
- };
- plot.shutdown = shutdown;
- plot.resize = function () {
- getCanvasDimensions();
- resizeCanvas(canvas);
- resizeCanvas(overlay);
- };
-
- // 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() {
- for (var i = 0; i < plugins.length; ++i) {
- var p = plugins[i];
- p.init(plot);
- if (p.options)
- $.extend(true, options, p.options);
- }
- }
-
- function parseOptions(opts) {
- var i;
-
- $.extend(true, options, opts);
-
- if (options.xaxis.color == null)
- options.xaxis.color = options.grid.color;
- if (options.yaxis.color == null)
- options.yaxis.color = options.grid.color;
-
- if (options.xaxis.tickColor == null) // backwards-compatibility
- options.xaxis.tickColor = options.grid.tickColor;
- if (options.yaxis.tickColor == null) // backwards-compatibility
- options.yaxis.tickColor = options.grid.tickColor;
-
- 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 in axes, copy at least always the
- // first as the rest of the code assumes it'll be there
- for (i = 0; i < Math.max(1, options.xaxes.length); ++i)
- options.xaxes[i] = $.extend(true, {}, options.xaxis, options.xaxes[i]);
- for (i = 0; i < Math.max(1, options.yaxes.length); ++i)
- options.yaxes[i] = $.extend(true, {}, options.yaxis, options.yaxes[i]);
-
- // 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;
-
- // 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: $.extend(true, {}, axes == xaxes ? options.xaxis : options.yaxis)
- };
-
- return axes[number - 1];
- }
-
- function fillInSeriesOptions() {
- var i;
-
- // collect what we already got of colors
- var neededColors = series.length,
- usedColors = [],
- assignedColors = [];
- for (i = 0; i < series.length; ++i) {
- var sc = series[i].color;
- if (sc != null) {
- --neededColors;
- if (typeof sc == "number")
- assignedColors.push(sc);
- else
- usedColors.push($.color.parse(series[i].color));
- }
- }
-
- // we might need to generate more colors if higher indices
- // are assigned
- for (i = 0; i < assignedColors.length; ++i) {
- neededColors = Math.max(neededColors, assignedColors[i] + 1);
- }
-
- // produce colors as needed
- var colors = [], variation = 0;
- i = 0;
- while (colors.length < neededColors) {
- var c;
- if (options.colors.length == i) // check degenerate case
- c = $.color.make(100, 100, 100);
- else
- c = $.color.parse(options.colors[i]);
-
- // vary color if needed
- var sign = variation % 2 == 1 ? -1 : 1;
- c.scale('rgb', 1 + sign * Math.ceil(variation / 2) * 0.2)
-
- // FIXME: if we're getting to close to something else,
- // we should probably skip this one
- colors.push(c);
-
- ++i;
- if (i >= options.colors.length) {
- i = 0;
- ++variation;
- }
- }
-
- // fill in the options
- 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;
- }
-
- // 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;
-
- 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];
-
- var 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)) {
- format.push({ y: true, number: true, required: false, defaultValue: 0 });
- 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;
-
- 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.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;
-
- 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 || 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 = s.bars.align == "left" ? 0 : -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 makeCanvas(skipPositioning, cls) {
- var c = document.createElement('canvas');
- c.className = cls;
- c.width = canvasWidth;
- c.height = canvasHeight;
-
- if (!skipPositioning)
- $(c).css({ position: 'absolute', left: 0, top: 0 });
-
- $(c).appendTo(placeholder);
-
- if (!c.getContext) // excanvas hack
- c = window.G_vmlCanvasManager.initElement(c);
-
- // used for resetting in case we get replotted
- c.getContext("2d").save();
-
- return c;
- }
-
- function getCanvasDimensions() {
- canvasWidth = placeholder.width();
- canvasHeight = placeholder.height();
-
- if (canvasWidth <= 0 || canvasHeight <= 0)
- throw "Invalid dimensions for plot, width = " + canvasWidth + ", height = " + canvasHeight;
- }
-
- function resizeCanvas(c) {
- // resizing should reset the state (excanvas seems to be
- // buggy though)
- if (c.width != canvasWidth)
- c.width = canvasWidth;
-
- if (c.height != canvasHeight)
- c.height = canvasHeight;
-
- // so try to get back to the initial state (even if it's
- // gone now, this should be safe according to the spec)
- var cctx = c.getContext("2d");
- cctx.restore();
-
- // and save again
- cctx.save();
- }
-
- function setupCanvases() {
- var reused,
- existingCanvas = placeholder.children("canvas.base"),
- existingOverlay = placeholder.children("canvas.overlay");
-
- if (existingCanvas.length == 0 || existingOverlay == 0) {
- // init everything
-
- placeholder.html(""); // make sure placeholder is clear
-
- placeholder.css({ padding: 0 }); // padding messes up the positioning
-
- if (placeholder.css("position") == 'static')
- placeholder.css("position", "relative"); // for positioning labels and overlay
-
- getCanvasDimensions();
-
- canvas = makeCanvas(true, "base");
- overlay = makeCanvas(false, "overlay"); // overlay canvas for interactive features
-
- reused = false;
- }
- else {
- // reuse existing elements
-
- canvas = existingCanvas.get(0);
- overlay = existingOverlay.get(0);
-
- reused = true;
- }
-
- ctx = canvas.getContext("2d");
- octx = overlay.getContext("2d");
-
- // we include the canvas in the event holder too, because IE 7
- // sometimes has trouble with the stacking order
- eventHolder = $([overlay, canvas]);
-
- if (reused) {
- // run shutdown in the old plot object
- placeholder.data("plot").shutdown();
-
- // reset reused canvases
- plot.resize();
-
- // make sure overlay pixels are cleared (canvas is cleared when we redraw)
- octx.clearRect(0, 0, canvasWidth, canvasHeight);
-
- // then whack any remaining obvious garbage left
- eventHolder.unbind();
- placeholder.children().not([canvas, overlay]).remove();
- }
-
- // save in case we get replotted
- placeholder.data("plot", plot);
- }
-
- function bindEvents() {
- // bind events
- if (options.grid.hoverable) {
- eventHolder.mousemove(onMouseMove);
- eventHolder.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, i, ticks = axis.ticks || [], labels = [],
- l, w = opts.labelWidth, h = opts.labelHeight, dummyDiv;
-
- function makeDummyDiv(labels, width) {
- return $('<div style="position:absolute;top:-10000px;' + width + 'font-size:smaller">' +
- '<div class="' + axis.direction + 'Axis ' + axis.direction + axis.n + 'Axis">'
- + labels.join("") + '</div></div>')
- .appendTo(placeholder);
- }
-
- if (axis.direction == "x") {
- // to avoid measuring the widths of the labels (it's slow), we
- // construct fixed-size boxes and put the labels inside
- // them, we don't need the exact figures and the
- // fixed-size box content is easy to center
- if (w == null)
- w = Math.floor(canvasWidth / (ticks.length > 0 ? ticks.length : 1));
-
- // measure x label heights
- if (h == null) {
- labels = [];
- for (i = 0; i < ticks.length; ++i) {
- l = ticks[i].label;
- if (l)
- labels.push('<div class="tickLabel" style="float:left;width:' + w + 'px">' + l + '</div>');
- }
-
- if (labels.length > 0) {
- // stick them all in the same div and measure
- // collective height
- labels.push('<div style="clear:left"></div>');
- dummyDiv = makeDummyDiv(labels, "width:10000px;");
- h = dummyDiv.height();
- dummyDiv.remove();
- }
- }
- }
- else if (w == null || h == null) {
- // calculate y label dimensions
- for (i = 0; i < ticks.length; ++i) {
- l = ticks[i].label;
- if (l)
- labels.push('<div class="tickLabel">' + l + '</div>');
- }
-
- if (labels.length > 0) {
- dummyDiv = makeDummyDiv(labels, "");
- if (w == null)
- w = dummyDiv.children().width();
- if (h == null)
- h = dummyDiv.find("div.tickLabel").height();
- dummyDiv.remove();
- }
- }
-
- if (w == null)
- w = 0;
- if (h == null)
- h = 0;
-
- axis.labelWidth = w;
- axis.labelHeight = h;
- }
-
- function allocateAxisBoxFirstPhase(axis) {
- // find the bounding box of the axis by looking at label
- // widths/heights and ticks, make room by diminishing the
- // plotOffset
-
- var lw = axis.labelWidth,
- lh = axis.labelHeight,
- pos = axis.options.position,
- tickLength = axis.options.tickLength,
- axismargin = options.grid.axisMargin,
- padding = options.grid.labelMargin,
- all = axis.direction == "x" ? xaxes : yaxes,
- index;
-
- // determine axis margin
- var samePosition = $.grep(all, function (a) {
- return a && a.options.position == pos && a.reserveSpace;
- });
- if ($.inArray(axis, samePosition) == samePosition.length - 1)
- axismargin = 0; // outermost
-
- // determine tick length - if we're innermost, we can use "full"
- if (tickLength == null)
- tickLength = "full";
-
- var sameDirection = $.grep(all, function (a) {
- return a && a.reserveSpace;
- });
-
- var innermost = $.inArray(axis, sameDirection) == 0;
- if (!innermost && tickLength == "full")
- tickLength = 5;
-
- if (!isNaN(+tickLength))
- padding += +tickLength;
-
- // compute box
- if (axis.direction == "x") {
- lh += padding;
-
- if (pos == "bottom") {
- plotOffset.bottom += lh + axismargin;
- axis.box = { top: canvasHeight - 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: canvasWidth - plotOffset.right, width: lw };
- }
- }
-
- // save for future reference
- axis.position = pos;
- axis.tickLength = tickLength;
- axis.box.padding = padding;
- axis.innermost = innermost;
- }
-
- function allocateAxisBoxSecondPhase(axis) {
- // set remaining bounding box coordinates
- if (axis.direction == "x") {
- axis.box.left = plotOffset.left;
- axis.box.width = plotWidth;
- }
- else {
- axis.box.top = plotOffset.top;
- axis.box.height = plotHeight;
- }
- }
-
- function setupGrid() {
- var i, axes = allAxes();
-
- // first calculate the plot and axis box dimensions
-
- $.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);
- });
-
- allocatedAxes = $.grep(axes, function (axis) { return axis.reserveSpace; });
-
- plotOffset.left = plotOffset.right = plotOffset.top = plotOffset.bottom = 0;
- if (options.grid.show) {
- $.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 in house, we can compute the
- // axis 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
- var minMargin = options.grid.minBorderMargin;
- if (minMargin == null) {
- minMargin = 0;
- for (i = 0; i < series.length; ++i)
- minMargin = Math.max(minMargin, series[i].points.radius + series[i].points.lineWidth/2);
- }
-
- for (var a in plotOffset) {
- plotOffset[a] += options.grid.borderWidth;
- plotOffset[a] = Math.max(minMargin, plotOffset[a]);
- }
- }
-
- plotWidth = canvasWidth - plotOffset.left - plotOffset.right;
- plotHeight = canvasHeight - plotOffset.bottom - plotOffset.top;
-
- // now we got the proper plotWidth/Height, we can compute the scaling
- $.each(axes, function (_, axis) {
- setTransformationHelpers(axis);
- });
-
- if (options.grid.show) {
- $.each(allocatedAxes, function (_, axis) {
- allocateAxisBoxSecondPhase(axis);
- });
-
- insertAxisLabels();
- }
-
- 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" ? canvasWidth : canvasHeight);
-
- var delta = (axis.max - axis.min) / noTicks,
- size, generator, unit, formatter, i, magn, norm;
-
- if (opts.mode == "time") {
- // pretty handling of time
-
- // map of app. size of time units in milliseconds
- var timeUnitSize = {
- "second": 1000,
- "minute": 60 * 1000,
- "hour": 60 * 60 * 1000,
- "day": 24 * 60 * 60 * 1000,
- "month": 30 * 24 * 60 * 60 * 1000,
- "year": 365.2425 * 24 * 60 * 60 * 1000
- };
-
-
- // the allowed tick sizes, after 1 year we use
- // an integer algorithm
- var spec = [
- [1, "second"], [2, "second"], [5, "second"], [10, "second"],
- [30, "second"],
- [1, "minute"], [2, "minute"], [5, "minute"], [10, "minute"],
- [30, "minute"],
- [1, "hour"], [2, "hour"], [4, "hour"],
- [8, "hour"], [12, "hour"],
- [1, "day"], [2, "day"], [3, "day"],
- [0.25, "month"], [0.5, "month"], [1, "month"],
- [2, "month"], [3, "month"], [6, "month"],
- [1, "year"]
- ];
-
- var minSize = 0;
- if (opts.minTickSize != null) {
- if (typeof opts.tickSize == "number")
- minSize = opts.tickSize;
- else
- minSize = opts.minTickSize[0] * timeUnitSize[opts.minTickSize[1]];
- }
-
- for (var i = 0; i < spec.length - 1; ++i)
- if (delta < (spec[i][0] * timeUnitSize[spec[i][1]]
- + spec[i + 1][0] * timeUnitSize[spec[i + 1][1]]) / 2
- && spec[i][0] * timeUnitSize[spec[i][1]] >= minSize)
- break;
- size = spec[i][0];
- unit = spec[i][1];
-
- // special-case the possibility of several years
- if (unit == "year") {
- magn = Math.pow(10, Math.floor(Math.log(delta / timeUnitSize.year) / Math.LN10));
- norm = (delta / timeUnitSize.year) / magn;
- if (norm < 1.5)
- size = 1;
- else if (norm < 3)
- size = 2;
- else if (norm < 7.5)
- size = 5;
- else
- size = 10;
-
- size *= magn;
- }
-
- axis.tickSize = opts.tickSize || [size, unit];
-
- generator = function(axis) {
- var ticks = [],
- tickSize = axis.tickSize[0], unit = axis.tickSize[1],
- d = new Date(axis.min);
-
- var step = tickSize * timeUnitSize[unit];
-
- if (unit == "second")
- d.setUTCSeconds(floorInBase(d.getUTCSeconds(), tickSize));
- if (unit == "minute")
- d.setUTCMinutes(floorInBase(d.getUTCMinutes(), tickSize));
- if (unit == "hour")
- d.setUTCHours(floorInBase(d.getUTCHours(), tickSize));
- if (unit == "month")
- d.setUTCMonth(floorInBase(d.getUTCMonth(), tickSize));
- if (unit == "year")
- d.setUTCFullYear(floorInBase(d.getUTCFullYear(), tickSize));
-
- // reset smaller components
- d.setUTCMilliseconds(0);
- if (step >= timeUnitSize.minute)
- d.setUTCSeconds(0);
- if (step >= timeUnitSize.hour)
- d.setUTCMinutes(0);
- if (step >= timeUnitSize.day)
- d.setUTCHours(0);
- if (step >= timeUnitSize.day * 4)
- d.setUTCDate(1);
- if (step >= timeUnitSize.year)
- d.setUTCMonth(0);
-
-
- var carry = 0, v = Number.NaN, prev;
- do {
- prev = v;
- v = d.getTime();
- ticks.push(v);
- if (unit == "month") {
- if (tickSize < 1) {
- // a bit complicated - we'll divide the month
- // up but we need to take care of fractions
- // so we don't end up in the middle of a day
- d.setUTCDate(1);
- var start = d.getTime();
- d.setUTCMonth(d.getUTCMonth() + 1);
- var end = d.getTime();
- d.setTime(v + carry * timeUnitSize.hour + (end - start) * tickSize);
- carry = d.getUTCHours();
- d.setUTCHours(0);
- }
- else
- d.setUTCMonth(d.getUTCMonth() + tickSize);
- }
- else if (unit == "year") {
- d.setUTCFullYear(d.getUTCFullYear() + tickSize);
- }
- else
- d.setTime(v + step);
- } while (v < axis.max && v != prev);
-
- return ticks;
- };
-
- formatter = function (v, axis) {
- var d = new Date(v);
-
- // first check global format
- if (opts.timeformat != null)
- return $.plot.formatDate(d, opts.timeformat, opts.monthNames);
-
- var t = axis.tickSize[0] * timeUnitSize[axis.tickSize[1]];
- var span = axis.max - axis.min;
- var suffix = (opts.twelveHourClock) ? " %p" : "";
-
- if (t < timeUnitSize.minute)
- fmt = "%h:%M:%S" + suffix;
- else if (t < timeUnitSize.day) {
- if (span < 2 * timeUnitSize.day)
- fmt = "%h:%M" + suffix;
- else
- fmt = "%b %d %h:%M" + suffix;
- }
- else if (t < timeUnitSize.month)
- fmt = "%b %d";
- else if (t < timeUnitSize.year) {
- if (span < timeUnitSize.year)
- fmt = "%b";
- else
- fmt = "%b %y";
- }
- else
- fmt = "%y";
-
- return $.plot.formatDate(d, fmt, opts.monthNames);
- };
- }
- else {
- // pretty rounding of base-10 numbers
- var maxDec = opts.tickDecimals;
- var dec = -Math.floor(Math.log(delta) / Math.LN10);
- if (maxDec != null && dec > maxDec)
- dec = maxDec;
-
- magn = Math.pow(10, -dec);
- norm = delta / magn; // norm is between 1.0 and 10.0
-
- 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.tickDecimals = Math.max(0, maxDec != null ? maxDec : dec);
- axis.tickSize = opts.tickSize || size;
-
- generator = function (axis) {
- var ticks = [];
-
- // spew out all possible ticks
- var 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;
- };
-
- formatter = function (v, axis) {
- return v.toFixed(axis.tickDecimals);
- };
- }
-
- 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 = generator(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]);
- }
-
- generator = 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 != "time" && opts.tickDecimals == null) {
- var extraDec = Math.max(0, -Math.floor(Math.log(delta) / Math.LN10) + 1),
- ts = generator(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;
- }
- }
- }
-
- axis.tickGenerator = generator;
- if ($.isFunction(opts.tickFormatter))
- axis.tickFormatter = function (v, axis) { return "" + opts.tickFormatter(v, axis); };
- else
- axis.tickFormatter = formatter;
- }
-
- function setTicks(axis) {
- var oticks = axis.options.ticks, ticks = [];
- if (oticks == null || (typeof oticks == "number" && oticks > 0))
- ticks = axis.tickGenerator(axis);
- else if (oticks) {
- if ($.isFunction(oticks))
- // generate the ticks
- ticks = oticks({ min: axis.min, max: axis.max });
- 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() {
- ctx.clearRect(0, 0, canvasWidth, canvasHeight);
-
- 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();
- }
-
- function extractRange(ranges, coord) {
- var axis, from, to, key, axes = allAxes();
-
- for (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;
-
- ctx.save();
- ctx.translate(plotOffset.left, plotOffset.top);
-
- // draw markings
- var markings = options.grid.markings;
- if (markings) {
- if ($.isFunction(markings)) {
- var 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
- var 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.strokeStyle = axis.options.tickColor || $.color.parse(axis.options.color).scale('a', 0.22).toString();
- 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.beginPath();
- xoff = yoff = 0;
- if (axis.direction == "x")
- xoff = plotWidth;
- else
- yoff = plotHeight;
-
- if (ctx.lineWidth == 1) {
- x = Math.floor(x) + 0.5;
- y = Math.floor(y) + 0.5;
- }
-
- ctx.moveTo(x, y);
- ctx.lineTo(x + xoff, y + yoff);
- ctx.stroke();
- }
-
- // draw ticks
- ctx.beginPath();
- for (i = 0; i < axis.ticks.length; ++i) {
- var v = axis.ticks[i].v;
-
- xoff = yoff = 0;
-
- if (v < axis.min || v > axis.max
- // skip those lying on the axes if we got a border
- || (t == "full" && 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) {
- ctx.lineWidth = bw;
- ctx.strokeStyle = options.grid.borderColor;
- ctx.strokeRect(-bw/2, -bw/2, plotWidth + bw, plotHeight + bw);
- }
-
- ctx.restore();
- }
-
- function insertAxisLabels() {
- placeholder.find(".tickLabels").remove();
-
- var html = ['<div class="tickLabels" style="font-size:smaller">'];
-
- var axes = allAxes();
- for (var j = 0; j < axes.length; ++j) {
- var axis = axes[j], box = axis.box;
- if (!axis.show)
- continue;
- //debug: html.push('<div style="position:absolute;opacity:0.10;background-color:red;left:' + box.left + 'px;top:' + box.top + 'px;width:' + box.width + 'px;height:' + box.height + 'px"></div>')
- html.push('<div class="' + axis.direction + 'Axis ' + axis.direction + axis.n + 'Axis" style="color:' + axis.options.color + '">');
- for (var i = 0; i < axis.ticks.length; ++i) {
- var tick = axis.ticks[i];
- if (!tick.label || tick.v < axis.min || tick.v > axis.max)
- continue;
-
- var pos = {}, align;
-
- if (axis.direction == "x") {
- align = "center";
- pos.left = Math.round(plotOffset.left + axis.p2c(tick.v) - axis.labelWidth/2);
- if (axis.position == "bottom")
- pos.top = box.top + box.padding;
- else
- pos.bottom = canvasHeight - (box.top + box.height - box.padding);
- }
- else {
- pos.top = Math.round(plotOffset.top + axis.p2c(tick.v) - axis.labelHeight/2);
- if (axis.position == "left") {
- pos.right = canvasWidth - (box.left + box.width - box.padding)
- align = "right";
- }
- else {
- pos.left = box.left + box.padding;
- align = "left";
- }
- }
-
- pos.width = axis.labelWidth;
-
- var style = ["position:absolute", "text-align:" + align ];
- for (var a in pos)
- style.push(a + ":" + pos[a] + "px")
-
- html.push('<div class="tickLabel" style="' + style.join(';') + '">' + tick.label + '</div>');
- }
- html.push('</div>');
- }
-
- html.push('</div>');
-
- placeholder.append(html.join(""));
- }
-
- 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 (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, offset, 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.beginPath();
- c.moveTo(left, bottom);
- c.lineTo(left, top);
- c.lineTo(right, top);
- c.lineTo(right, bottom);
- c.fillStyle = fillStyleCallback(bottom, top);
- c.fill();
- }
-
- // draw outline
- if (lineWidth > 0 && (drawLeft || drawRight || drawTop || drawBottom)) {
- c.beginPath();
-
- // FIXME: inline moveTo is buggy with excanvas
- c.moveTo(left, bottom + offset);
- if (drawLeft)
- c.lineTo(left, top + offset);
- else
- c.moveTo(left, top + offset);
- if (drawTop)
- c.lineTo(right, top + offset);
- else
- c.moveTo(right, top + offset);
- if (drawRight)
- c.lineTo(right, bottom + offset);
- else
- c.moveTo(right, bottom + offset);
- if (drawBottom)
- c.lineTo(left, bottom + offset);
- else
- c.moveTo(left, bottom + offset);
- c.stroke();
- }
- }
-
- function drawSeriesBars(series) {
- function plotBars(datapoints, barLeft, barRight, offset, 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, offset, 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 = series.bars.align == "left" ? 0 : -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, 0, 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() {
- placeholder.find(".legend").remove();
-
- if (!options.legend.show)
- return;
-
- var fragments = [], rowStarted = false,
- lf = options.legend.labelFormatter, s, label;
- for (var i = 0; i < series.length; ++i) {
- s = series[i];
- label = s.label;
- if (!label)
- continue;
-
- if (i % options.legend.noColumns == 0) {
- if (rowStarted)
- fragments.push('</tr>');
- fragments.push('<tr>');
- rowStarted = true;
- }
-
- if (lf)
- label = lf(label, s);
-
- fragments.push(
- '<td class="legendColorBox"><div style="border:1px solid ' + options.legend.labelBoxBorderColor + ';padding:1px"><div style="width:4px;height:0;border:5px solid ' + s.color + ';overflow:hidden"></div></div></td>' +
- '<td class="legendLabel">' + 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;
-
- 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,
- ps = s.datapoints.pointsize,
- mx = axisx.c2p(mouseX), // precompute some stuff to make the loop faster
- my = axisy.c2p(mouseY),
- maxx = maxDistance / axisx.scale,
- maxy = maxDistance / axisy.scale;
-
- // 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 = s.bars.align == "left" ? 0 : -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);
- item.pageY = parseInt(item.series.yaxis.p2c(item.datapoint[1]) + offset.top + plotOffset.top);
- }
-
- 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() {
- if (!redrawTimeout)
- redrawTimeout = setTimeout(drawOverlay, 30);
- }
-
- function drawOverlay() {
- redrawTimeout = null;
-
- // draw highlights
- octx.save();
- octx.clearRect(0, 0, canvasWidth, canvasHeight);
- 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();
- }
-
- if (typeof s == "number")
- s = series[s];
-
- if (typeof point == "number")
- point = s.data[point];
-
- 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;
-
- 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 = $.color.parse(series.color).scale('a', 0.5).toString();
- 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) {
- octx.lineWidth = series.bars.lineWidth;
- octx.strokeStyle = $.color.parse(series.color).scale('a', 0.5).toString();
- var fillStyle = $.color.parse(series.color).scale('a', 0.5).toString();
- var barLeft = series.bars.align == "left" ? 0 : -series.bars.barWidth/2;
- drawBar(point[0], point[1], point[2] || 0, barLeft, barLeft + series.bars.barWidth,
- 0, 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;
- }
- }
- }
-
- $.plot = function(placeholder, data, options) {
- //var t0 = new Date();
- var plot = new Plot($(placeholder), data, options, $.plot.plugins);
- //(window.console ? console.log : alert)("time used (msecs): " + ((new Date()).getTime() - t0.getTime()));
- return plot;
- };
-
- $.plot.version = "0.7";
-
- $.plot.plugins = [];
-
- // returns a string with the date d formatted according to fmt
- $.plot.formatDate = function(d, fmt, monthNames) {
- var leftPad = function(n) {
- n = "" + n;
- return n.length == 1 ? "0" + n : n;
- };
-
- var r = [];
- var escape = false, padNext = false;
- var hours = d.getUTCHours();
- var isAM = hours < 12;
- if (monthNames == null)
- monthNames = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
-
- if (fmt.search(/%p|%P/) != -1) {
- if (hours > 12) {
- hours = hours - 12;
- } else if (hours == 0) {
- hours = 12;
- }
- }
- for (var i = 0; i < fmt.length; ++i) {
- var c = fmt.charAt(i);
-
- if (escape) {
- switch (c) {
- case 'h': c = "" + hours; break;
- case 'H': c = leftPad(hours); break;
- case 'M': c = leftPad(d.getUTCMinutes()); break;
- case 'S': c = leftPad(d.getUTCSeconds()); break;
- case 'd': c = "" + d.getUTCDate(); break;
- case 'm': c = "" + (d.getUTCMonth() + 1); break;
- case 'y': c = "" + d.getUTCFullYear(); break;
- case 'b': c = "" + monthNames[d.getUTCMonth()]; break;
- case 'p': c = (isAM) ? ("" + "am") : ("" + "pm"); break;
- case 'P': c = (isAM) ? ("" + "AM") : ("" + "PM"); break;
- case '0': c = ""; padNext = true; break;
- }
- if (c && padNext) {
- c = leftPad(c);
- padNext = false;
- }
- r.push(c);
- if (!padNext)
- escape = false;
- }
- else {
- if (c == "%")
- escape = true;
- else
- r.push(c);
- }
- }
- return r.join("");
- };
-
- // round to nearby lower multiple of base
- function floorInBase(n, base) {
- return base * Math.floor(n / base);
- }
-
-})(jQuery);