Mercurial > ~darius > hgwebdir.cgi > iwws
view static/jquery.flot.js @ 9:6edb93c20971
Fix stretching the graph limits for temperature.
| author | Daniel O'Connor <darius@dons.net.au> |
|---|---|
| date | Tue, 03 Jan 2012 19:05:55 +1030 |
| parents | 2d9ee2b3ae82 |
| children |
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/* Javascript plotting library for jQuery, v. 0.6. * * 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 1.0. * * 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() work in-place instead of returning * new objects. */ (function(){jQuery.color={};jQuery.color.make=function(E,D,B,C){var F={};F.r=E||0;F.g=D||0;F.b=B||0;F.a=C!=null?C:1;F.add=function(I,H){for(var G=0;G<I.length;++G){F[I.charAt(G)]+=H}return F.normalize()};F.scale=function(I,H){for(var G=0;G<I.length;++G){F[I.charAt(G)]*=H}return F.normalize()};F.toString=function(){if(F.a>=1){return"rgb("+[F.r,F.g,F.b].join(",")+")"}else{return"rgba("+[F.r,F.g,F.b,F.a].join(",")+")"}};F.normalize=function(){function G(I,J,H){return J<I?I:(J>H?H:J)}F.r=G(0,parseInt(F.r),255);F.g=G(0,parseInt(F.g),255);F.b=G(0,parseInt(F.b),255);F.a=G(0,F.a,1);return F};F.clone=function(){return jQuery.color.make(F.r,F.b,F.g,F.a)};return F.normalize()};jQuery.color.extract=function(C,B){var D;do{D=C.css(B).toLowerCase();if(D!=""&&D!="transparent"){break}C=C.parent()}while(!jQuery.nodeName(C.get(0),"body"));if(D=="rgba(0, 0, 0, 0)"){D="transparent"}return jQuery.color.parse(D)};jQuery.color.parse=function(E){var D,B=jQuery.color.make;if(D=/rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(E)){return B(parseInt(D[1],10),parseInt(D[2],10),parseInt(D[3],10))}if(D=/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(E)){return B(parseInt(D[1],10),parseInt(D[2],10),parseInt(D[3],10),parseFloat(D[4]))}if(D=/rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(E)){return B(parseFloat(D[1])*2.55,parseFloat(D[2])*2.55,parseFloat(D[3])*2.55)}if(D=/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(E)){return B(parseFloat(D[1])*2.55,parseFloat(D[2])*2.55,parseFloat(D[3])*2.55,parseFloat(D[4]))}if(D=/#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(E)){return B(parseInt(D[1],16),parseInt(D[2],16),parseInt(D[3],16))}if(D=/#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(E)){return B(parseInt(D[1]+D[1],16),parseInt(D[2]+D[2],16),parseInt(D[3]+D[3],16))}var C=jQuery.trim(E).toLowerCase();if(C=="transparent"){return B(255,255,255,0)}else{D=A[C];return B(D[0],D[1],D[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]}})(); // 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: { mode: null, // null or "time" 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, // 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 }, x2axis: { autoscaleMargin: null }, y2axis: { autoscaleMargin: 0.02 }, series: { points: { show: false, radius: 3, lineWidth: 2, // in pixels fill: true, fillColor: "#ffffff" }, 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 // when horizontal, left is now top }, shadowSize: 3 }, grid: { show: true, aboveData: false, color: "#545454", // primary color used for outline and labels backgroundColor: null, // null for transparent, else color tickColor: "rgba(0,0,0,0.15)", // color used for the ticks labelMargin: 5, // in pixels borderWidth: 2, // in pixels borderColor: null, // set if different from the grid color 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, axes = { xaxis: {}, yaxis: {}, x2axis: {}, y2axis: {} }, plotOffset = { left: 0, right: 0, top: 0, bottom: 0}, canvasWidth = 0, canvasHeight = 0, plotWidth = 0, plotHeight = 0, hooks = { processOptions: [], processRawData: [], processDatapoints: [], draw: [], bindEvents: [], drawOverlay: [] }, 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() { return axes; }; plot.getOptions = function() { return options; }; plot.highlight = highlight; plot.unhighlight = unhighlight; plot.triggerRedrawOverlay = triggerRedrawOverlay; plot.pointOffset = function(point) { return { left: parseInt(axisSpecToRealAxis(point, "xaxis").p2c(+point.x) + plotOffset.left), top: parseInt(axisSpecToRealAxis(point, "yaxis").p2c(+point.y) + plotOffset.top) }; }; // public attributes plot.hooks = hooks; // initialize initPlugins(plot); parseOptions(options_); constructCanvas(); 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) { $.extend(true, options, opts); if (options.grid.borderColor == null) options.grid.borderColor = options.grid.color; // 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.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) options.series.shadowSize = options.shadowSize; 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) { s.data = d[i].data; // move the data instead of deep-copy delete d[i].data; $.extend(true, s, d[i]); d[i].data = s.data; } else s.data = d[i]; res.push(s); } return res; } function axisSpecToRealAxis(obj, attr) { var a = obj[attr]; if (!a || a == 1) return axes[attr]; if (typeof a == "number") return axes[attr.charAt(0) + a + attr.slice(1)]; return a; // assume it's OK } function fillInSeriesOptions() { var i; // collect what we already got of colors var neededColors = series.length, usedColors = [], assignedColors = []; for (i = 0; i < series.length; ++i) { var sc = series[i].color; if (sc != null) { --neededColors; if (typeof sc == "number") assignedColors.push(sc); else usedColors.push($.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].show) { show = false; break; } if (show) s.lines.show = true; } // setup axes s.xaxis = axisSpecToRealAxis(s, "xaxis"); s.yaxis = axisSpecToRealAxis(s, "yaxis"); } } function processData() { var topSentry = Number.POSITIVE_INFINITY, bottomSentry = Number.NEGATIVE_INFINITY, i, j, k, m, length, s, points, ps, x, y, axis, val, f, p; for (axis in axes) { axes[axis].datamin = topSentry; axes[axis].datamax = bottomSentry; axes[axis].used = false; } function updateAxis(axis, min, max) { if (min < axis.datamin) axis.datamin = min; if (max > axis.datamax) axis.datamax = max; } 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) format.push({ y: true, number: true, required: false, defaultValue: 0 }); s.datapoints.format = format; } if (s.datapoints.pointsize != null) continue; // already filled in if (s.datapoints.pointsize == null) 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; } 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) 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); } for (axis in axes) { if (axes[axis].datamin == topSentry) axes[axis].datamin = null; if (axes[axis].datamax == bottomSentry) axes[axis].datamax = null; } } function constructCanvas() { function makeCanvas(width, height) { var c = document.createElement('canvas'); c.width = width; c.height = height; if ($.browser.msie) // excanvas hack c = window.G_vmlCanvasManager.initElement(c); return c; } canvasWidth = placeholder.width(); canvasHeight = placeholder.height(); placeholder.html(""); // clear placeholder if (placeholder.css("position") == 'static') placeholder.css("position", "relative"); // for positioning labels and overlay if (canvasWidth <= 0 || canvasHeight <= 0) throw "Invalid dimensions for plot, width = " + canvasWidth + ", height = " + canvasHeight; if ($.browser.msie) // excanvas hack window.G_vmlCanvasManager.init_(document); // make sure everything is setup // the canvas canvas = $(makeCanvas(canvasWidth, canvasHeight)).appendTo(placeholder).get(0); ctx = canvas.getContext("2d"); // overlay canvas for interactive features overlay = $(makeCanvas(canvasWidth, canvasHeight)).css({ position: 'absolute', left: 0, top: 0 }).appendTo(placeholder).get(0); octx = overlay.getContext("2d"); octx.stroke(); } function bindEvents() { // we include the canvas in the event holder too, because IE 7 // sometimes has trouble with the stacking order eventHolder = $([overlay, canvas]); // bind events if (options.grid.hoverable) eventHolder.mousemove(onMouseMove); if (options.grid.clickable) eventHolder.click(onClick); executeHooks(hooks.bindEvents, [eventHolder]); } function setupGrid() { function setTransformationHelpers(axis, o) { function identity(x) { return x; } var s, m, t = o.transform || identity, it = o.inverseTransform; // add transformation helpers if (axis == axes.xaxis || axis == axes.x2axis) { // precompute how much the axis is scaling a point // in canvas space s = axis.scale = plotWidth / (t(axis.max) - t(axis.min)); m = 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); }; } else { s = axis.scale = plotHeight / (t(axis.max) - t(axis.min)); m = t(axis.max); if (t == identity) axis.p2c = function (p) { return (m - p) * s; }; else axis.p2c = function (p) { return (m - t(p)) * s; }; if (!it) axis.c2p = function (c) { return m - c / s; }; else axis.c2p = function (c) { return it(m - c / s); }; } } function measureLabels(axis, axisOptions) { var i, labels = [], l; axis.labelWidth = axisOptions.labelWidth; axis.labelHeight = axisOptions.labelHeight; if (axis == axes.xaxis || axis == axes.x2axis) { // to avoid measuring the widths of the labels, 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 (axis.labelWidth == null) axis.labelWidth = canvasWidth / (axis.ticks.length > 0 ? axis.ticks.length : 1); // measure x label heights if (axis.labelHeight == null) { labels = []; for (i = 0; i < axis.ticks.length; ++i) { l = axis.ticks[i].label; if (l) labels.push('<div class="tickLabel" style="float:left;width:' + axis.labelWidth + 'px">' + l + '</div>'); } if (labels.length > 0) { var dummyDiv = $('<div style="position:absolute;top:-10000px;width:10000px;font-size:smaller">' + labels.join("") + '<div style="clear:left"></div></div>').appendTo(placeholder); axis.labelHeight = dummyDiv.height(); dummyDiv.remove(); } } } else if (axis.labelWidth == null || axis.labelHeight == null) { // calculate y label dimensions for (i = 0; i < axis.ticks.length; ++i) { l = axis.ticks[i].label; if (l) labels.push('<div class="tickLabel">' + l + '</div>'); } if (labels.length > 0) { var dummyDiv = $('<div style="position:absolute;top:-10000px;font-size:smaller">' + labels.join("") + '</div>').appendTo(placeholder); if (axis.labelWidth == null) axis.labelWidth = dummyDiv.width(); if (axis.labelHeight == null) axis.labelHeight = dummyDiv.find("div").height(); dummyDiv.remove(); } } if (axis.labelWidth == null) axis.labelWidth = 0; if (axis.labelHeight == null) axis.labelHeight = 0; } function setGridSpacing() { // get the most space needed around the grid for things // that may stick out var maxOutset = options.grid.borderWidth; for (i = 0; i < series.length; ++i) maxOutset = Math.max(maxOutset, 2 * (series[i].points.radius + series[i].points.lineWidth/2)); plotOffset.left = plotOffset.right = plotOffset.top = plotOffset.bottom = maxOutset; var margin = options.grid.labelMargin + options.grid.borderWidth; if (axes.xaxis.labelHeight > 0) plotOffset.bottom = Math.max(maxOutset, axes.xaxis.labelHeight + margin); if (axes.yaxis.labelWidth > 0) plotOffset.left = Math.max(maxOutset, axes.yaxis.labelWidth + margin); if (axes.x2axis.labelHeight > 0) plotOffset.top = Math.max(maxOutset, axes.x2axis.labelHeight + margin); if (axes.y2axis.labelWidth > 0) plotOffset.right = Math.max(maxOutset, axes.y2axis.labelWidth + margin); plotWidth = canvasWidth - plotOffset.left - plotOffset.right; plotHeight = canvasHeight - plotOffset.bottom - plotOffset.top; } var axis; for (axis in axes) setRange(axes[axis], options[axis]); if (options.grid.show) { for (axis in axes) { prepareTickGeneration(axes[axis], options[axis]); setTicks(axes[axis], options[axis]); measureLabels(axes[axis], options[axis]); } setGridSpacing(); } else { plotOffset.left = plotOffset.right = plotOffset.top = plotOffset.bottom = 0; plotWidth = canvasWidth; plotHeight = canvasHeight; } for (axis in axes) setTransformationHelpers(axes[axis], options[axis]); if (options.grid.show) insertLabels(); insertLegend(); } function setRange(axis, axisOptions) { var min = +(axisOptions.min != null ? axisOptions.min : axis.datamin), max = +(axisOptions.max != null ? axisOptions.max : axis.datamax), delta = max - min; if (delta == 0.0) { // degenerate case var widen = max == 0 ? 1 : 0.01; if (axisOptions.min == null) min -= widen; // alway widen max if we couldn't widen min to ensure we // don't fall into min == max which doesn't work if (axisOptions.max == null || axisOptions.min != null) max += widen; } else { // consider autoscaling var margin = axisOptions.autoscaleMargin; if (margin != null) { if (axisOptions.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 (axisOptions.max == null) { max += delta * margin; if (max > 0 && axis.datamax != null && axis.datamax <= 0) max = 0; } } } axis.min = min; axis.max = max; } function prepareTickGeneration(axis, axisOptions) { // estimate number of ticks var noTicks; if (typeof axisOptions.ticks == "number" && axisOptions.ticks > 0) noTicks = axisOptions.ticks; else if (axis == axes.xaxis || axis == axes.x2axis) // heuristic based on the model a*sqrt(x) fitted to // some reasonable data points noTicks = 0.3 * Math.sqrt(canvasWidth); else noTicks = 0.3 * Math.sqrt(canvasHeight); var delta = (axis.max - axis.min) / noTicks, size, generator, unit, formatter, i, magn, norm; if (axisOptions.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 (axisOptions.minTickSize != null) { if (typeof axisOptions.tickSize == "number") minSize = axisOptions.tickSize; else minSize = axisOptions.minTickSize[0] * timeUnitSize[axisOptions.minTickSize[1]]; } for (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; } if (axisOptions.tickSize) { size = axisOptions.tickSize[0]; unit = axisOptions.tickSize[1]; } 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: v, label: axis.tickFormatter(v, axis) }); 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 (axisOptions.timeformat != null) return $.plot.formatDate(d, axisOptions.timeformat, axisOptions.monthNames); var t = axis.tickSize[0] * timeUnitSize[axis.tickSize[1]]; var span = axis.max - axis.min; var suffix = (axisOptions.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 $.plot.formatDate(d, fmt, axisOptions.monthNames); }; } else { // pretty rounding of base-10 numbers var maxDec = axisOptions.tickDecimals; var dec = -Math.floor(Math.log(delta) / Math.LN10); if (maxDec != null && dec > maxDec) dec = maxDec; magn = Math.pow(10, -dec); norm = delta / magn; // norm is between 1.0 and 10.0 if (norm < 1.5) size = 1; else if (norm < 3) { size = 2; // special case for 2.5, requires an extra decimal if (norm > 2.25 && (maxDec == null || dec + 1 <= maxDec)) { size = 2.5; ++dec; } } else if (norm < 7.5) size = 5; else size = 10; size *= magn; if (axisOptions.minTickSize != null && size < axisOptions.minTickSize) size = axisOptions.minTickSize; if (axisOptions.tickSize != null) size = axisOptions.tickSize; axis.tickDecimals = Math.max(0, (maxDec != null) ? maxDec : dec); generator = function (axis) { var ticks = []; // spew out all possible ticks var start = floorInBase(axis.min, axis.tickSize), i = 0, v = Number.NaN, prev; do { prev = v; v = start + i * axis.tickSize; ticks.push({ v: v, label: axis.tickFormatter(v, axis) }); ++i; } while (v < axis.max && v != prev); return ticks; }; formatter = function (v, axis) { return v.toFixed(axis.tickDecimals); }; } axis.tickSize = unit ? [size, unit] : size; axis.tickGenerator = generator; if ($.isFunction(axisOptions.tickFormatter)) axis.tickFormatter = function (v, axis) { return "" + axisOptions.tickFormatter(v, axis); }; else axis.tickFormatter = formatter; } function setTicks(axis, axisOptions) { axis.ticks = []; if (!axis.used) return; if (axisOptions.ticks == null) axis.ticks = axis.tickGenerator(axis); else if (typeof axisOptions.ticks == "number") { if (axisOptions.ticks > 0) axis.ticks = axis.tickGenerator(axis); } else if (axisOptions.ticks) { var ticks = axisOptions.ticks; if ($.isFunction(ticks)) // generate the ticks ticks = ticks({ min: axis.min, max: axis.max }); // clean up the user-supplied ticks, copy them over var i, v; 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); axis.ticks[i] = { v: v, label: label }; } } if (axisOptions.autoscaleMargin != null && axis.ticks.length > 0) { // snap to ticks if (axisOptions.min == null) axis.min = Math.min(axis.min, axis.ticks[0].v); if (axisOptions.max == null && axis.ticks.length > 1) axis.max = Math.max(axis.max, axis.ticks[axis.ticks.length - 1].v); } } function draw() { ctx.clearRect(0, 0, canvasWidth, canvasHeight); var grid = options.grid; if (grid.show && !grid.aboveData) drawGrid(); for (var i = 0; i < series.length; ++i) drawSeries(series[i]); executeHooks(hooks.draw, [ctx]); if (grid.show && grid.aboveData) drawGrid(); } function extractRange(ranges, coord) { var firstAxis = coord + "axis", secondaryAxis = coord + "2axis", axis, from, to, reverse; if (ranges[firstAxis]) { axis = axes[firstAxis]; from = ranges[firstAxis].from; to = ranges[firstAxis].to; } else if (ranges[secondaryAxis]) { axis = axes[secondaryAxis]; from = ranges[secondaryAxis].from; to = ranges[secondaryAxis].to; } else { // backwards-compat stuff - to be removed in future axis = axes[firstAxis]; from = ranges[coord + "1"]; to = ranges[coord + "2"]; } // auto-reverse as an added bonus if (from != null && to != null && from > to) return { from: to, to: from, axis: axis }; return { from: from, to: to, axis: axis }; } function drawGrid() { var i; ctx.save(); ctx.translate(plotOffset.left, plotOffset.top); // draw background, if any if (options.grid.backgroundColor) { ctx.fillStyle = getColorOrGradient(options.grid.backgroundColor, plotHeight, 0, "rgba(255, 255, 255, 0)"); ctx.fillRect(0, 0, plotWidth, plotHeight); } // draw markings var markings = options.grid.markings; if (markings) { if ($.isFunction(markings)) // xmin etc. are backwards-compatible, to be removed in future markings = markings({ xmin: axes.xaxis.min, xmax: axes.xaxis.max, ymin: axes.yaxis.min, ymax: axes.yaxis.max, xaxis: axes.xaxis, yaxis: axes.yaxis, x2axis: axes.x2axis, y2axis: axes.y2axis }); 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(Math.floor(xrange.from), yrange.from); //ctx.lineTo(Math.floor(xrange.to), yrange.to); 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 inner grid ctx.lineWidth = 1; ctx.strokeStyle = options.grid.tickColor; ctx.beginPath(); var v, axis = axes.xaxis; for (i = 0; i < axis.ticks.length; ++i) { v = axis.ticks[i].v; if (v <= axis.min || v >= axes.xaxis.max) continue; // skip those lying on the axes ctx.moveTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, 0); ctx.lineTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, plotHeight); } axis = axes.yaxis; for (i = 0; i < axis.ticks.length; ++i) { v = axis.ticks[i].v; if (v <= axis.min || v >= axis.max) continue; ctx.moveTo(0, Math.floor(axis.p2c(v)) + ctx.lineWidth/2); ctx.lineTo(plotWidth, Math.floor(axis.p2c(v)) + ctx.lineWidth/2); } axis = axes.x2axis; for (i = 0; i < axis.ticks.length; ++i) { v = axis.ticks[i].v; if (v <= axis.min || v >= axis.max) continue; ctx.moveTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, -5); ctx.lineTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, 5); } axis = axes.y2axis; for (i = 0; i < axis.ticks.length; ++i) { v = axis.ticks[i].v; if (v <= axis.min || v >= axis.max) continue; ctx.moveTo(plotWidth-5, Math.floor(axis.p2c(v)) + ctx.lineWidth/2); ctx.lineTo(plotWidth+5, Math.floor(axis.p2c(v)) + ctx.lineWidth/2); } ctx.stroke(); if (options.grid.borderWidth) { // draw border var bw = options.grid.borderWidth; ctx.lineWidth = bw; ctx.strokeStyle = options.grid.borderColor; ctx.strokeRect(-bw/2, -bw/2, plotWidth + bw, plotHeight + bw); } ctx.restore(); } function insertLabels() { placeholder.find(".tickLabels").remove(); var html = ['<div class="tickLabels" style="font-size:smaller;color:' + options.grid.color + '">']; function addLabels(axis, labelGenerator) { 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; html.push(labelGenerator(tick, axis)); } } var margin = options.grid.labelMargin + options.grid.borderWidth; addLabels(axes.xaxis, function (tick, axis) { return '<div style="position:absolute;top:' + (plotOffset.top + plotHeight + margin) + 'px;left:' + Math.round(plotOffset.left + axis.p2c(tick.v) - axis.labelWidth/2) + 'px;width:' + axis.labelWidth + 'px;text-align:center" class="tickLabel">' + tick.label + "</div>"; }); addLabels(axes.yaxis, function (tick, axis) { return '<div style="position:absolute;top:' + Math.round(plotOffset.top + axis.p2c(tick.v) - axis.labelHeight/2) + 'px;right:' + (plotOffset.right + plotWidth + margin) + 'px;width:' + axis.labelWidth + 'px;text-align:right" class="tickLabel">' + tick.label + "</div>"; }); addLabels(axes.x2axis, function (tick, axis) { return '<div style="position:absolute;bottom:' + (plotOffset.bottom + plotHeight + margin) + 'px;left:' + Math.round(plotOffset.left + axis.p2c(tick.v) - axis.labelWidth/2) + 'px;width:' + axis.labelWidth + 'px;text-align:center" class="tickLabel">' + tick.label + "</div>"; }); addLabels(axes.y2axis, function (tick, axis) { return '<div style="position:absolute;top:' + Math.round(plotOffset.top + axis.p2c(tick.v) - axis.labelHeight/2) + 'px;left:' + (plotOffset.left + plotWidth + margin) +'px;width:' + axis.labelWidth + 'px;text-align:left" class="tickLabel">' + tick.label + "</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), top, lastX = 0, areaOpen = false; 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 (areaOpen && x1 != null && x2 == null) { // close area ctx.lineTo(axisx.p2c(lastX), axisy.p2c(bottom)); ctx.fill(); areaOpen = false; 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)); lastX = x2; 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)); lastX = x2; continue; } // else it's a bit more complicated, there might // be two rectangles and two triangles we need to fill // in; to find these keep track of the current x values var x1old = x1, x2old = x2; // and clip the y values, without shortcutting // 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) { if (y1 <= axisy.min) top = axisy.min; else top = axisy.max; ctx.lineTo(axisx.p2c(x1old), axisy.p2c(top)); ctx.lineTo(axisx.p2c(x1), axisy.p2c(top)); } // fill the triangles 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) { if (y2 <= axisy.min) top = axisy.min; else top = axisy.max; ctx.lineTo(axisx.p2c(x2), axisy.p2c(top)); ctx.lineTo(axisx.p2c(x2old), axisy.p2c(top)); } lastX = Math.max(x2, x2old); } if (areaOpen) { ctx.lineTo(axisx.p2c(lastX), axisy.p2c(bottom)); ctx.fill(); } } 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, circumference, axisx, axisy) { 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(); ctx.arc(axisx.p2c(x), axisy.p2c(y) + offset, radius, 0, circumference, false); if (fillStyle) { ctx.fillStyle = fillStyle; ctx.fill(); } ctx.stroke(); } } ctx.save(); ctx.translate(plotOffset.left, plotOffset.top); var lw = series.lines.lineWidth, sw = series.shadowSize, radius = series.points.radius; 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, Math.PI, series.xaxis, series.yaxis); ctx.strokeStyle = "rgba(0,0,0,0.2)"; plotPoints(series.datapoints, radius, null, w/2, Math.PI, series.xaxis, series.yaxis); } ctx.lineWidth = lw; ctx.strokeStyle = series.color; plotPoints(series.datapoints, radius, getFillStyle(series.points, series.color), 0, 2 * Math.PI, series.xaxis, series.yaxis); ctx.restore(); } function drawBar(x, y, b, barLeft, barRight, offset, fillStyleCallback, axisx, axisy, c, horizontal) { var left, right, bottom, top, drawLeft, drawRight, drawTop, drawBottom, tmp; 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 (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); } } 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 (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 = 0; i < series.length; ++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; 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 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(), pos = { pageX: event.pageX, pageY: event.pageY }, canvasX = event.pageX - offset.left - plotOffset.left, canvasY = event.pageY - offset.top - plotOffset.top; if (axes.xaxis.used) pos.x = axes.xaxis.c2p(canvasX); if (axes.yaxis.used) pos.y = axes.yaxis.c2p(canvasY); if (axes.x2axis.used) pos.x2 = axes.x2axis.c2p(canvasX); if (axes.y2axis.used) pos.y2 = axes.y2axis.c2p(canvasY); 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 == item.datapoint)) 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") point = s.data[point]; 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; octx.beginPath(); octx.arc(axisx.p2c(x), axisy.p2c(y), radius, 0, 2 * Math.PI, false); 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); } 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") { c = $.color.parse(defaultColor).scale('rgb', c.brightness); c.a *= c.opacity; c = c.toString(); } gradient.addColorStop(i / (l - 1), c); } return gradient; } } } $.plot = function(placeholder, data, options) { var plot = new Plot($(placeholder), data, options, $.plot.plugins); /*var t0 = new Date(); var t1 = new Date(); var tstr = "time used (msecs): " + (t1.getTime() - t0.getTime()) if (window.console) console.log(tstr); else alert(tstr);*/ return plot; }; $.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; 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; } r.push(c); 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);