| /*! 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); |