From 7385ff9506ea6db4c07150ee1b56e436cf384918 Mon Sep 17 00:00:00 2001 From: Frank Wuerthwein Date: Thu, 25 Sep 2008 06:12:15 -0400 Subject: flot-0.5 --- jquery.flot.js | 2136 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 2136 insertions(+) create mode 100644 jquery.flot.js (limited to 'jquery.flot.js') diff --git a/jquery.flot.js b/jquery.flot.js new file mode 100644 index 0000000..b1b298e --- /dev/null +++ b/jquery.flot.js @@ -0,0 +1,2136 @@ +/* Javascript plotting library for jQuery, v. 0.5. + * + * Released under the MIT license by IOLA, December 2007. + * + */ + +(function($) { + function Plot(target_, data_, options_) { + // 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" + 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 + }, + yaxis: { + autoscaleMargin: 0.02 + }, + x2axis: { + autoscaleMargin: null + }, + y2axis: { + autoscaleMargin: 0.02 + }, + points: { + show: false, + radius: 3, + lineWidth: 2, // in pixels + fill: true, + fillColor: "#ffffff" + }, + lines: { + show: false, + lineWidth: 2, // in pixels + fill: false, + fillColor: null + }, + bars: { + show: false, + lineWidth: 2, // in pixels + barWidth: 1, // in units of the x axis + fill: true, + fillColor: null, + align: "left" // or "center" + }, + grid: { + color: "#545454", // primary color used for outline and labels + backgroundColor: null, // null for transparent, else color + tickColor: "#dddddd", // color used for the ticks + labelMargin: 5, // in pixels + borderWidth: 2, + 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 + }, + selection: { + mode: null, // one of null, "x", "y" or "xy" + color: "#e8cfac" + }, + shadowSize: 4 + }, + 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, + target = target_, + axes = { xaxis: {}, yaxis: {}, x2axis: {}, y2axis: {} }, + plotOffset = { left: 0, right: 0, top: 0, bottom: 0}, + canvasWidth = 0, canvasHeight = 0, + plotWidth = 0, plotHeight = 0, + // dedicated to storing data for buggy standard compliance cases + workarounds = {}; + + this.setData = setData; + this.setupGrid = setupGrid; + this.draw = draw; + this.clearSelection = clearSelection; + this.setSelection = setSelection; + this.getCanvas = function() { return canvas; }; + this.getPlotOffset = function() { return plotOffset; }; + this.getData = function() { return series; }; + this.getAxes = function() { return axes; }; + this.highlight = highlight; + this.unhighlight = unhighlight; + + // initialize + parseOptions(options_); + setData(data_); + constructCanvas(); + setupGrid(); + draw(); + + + function setData(d) { + series = parseData(d); + + fillInSeriesOptions(); + processData(); + } + + function parseData(d) { + var res = []; + for (var i = 0; i < d.length; ++i) { + var s; + if (d[i].data) { + s = {}; + for (var v in d[i]) + s[v] = d[i][v]; + } + else { + s = { data: d[i] }; + } + res.push(s); + } + + return res; + } + + function parseOptions(o) { + $.extend(true, options, o); + + // 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; + } + + 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(parseColor(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 = new Color(100, 100, 100); + else + c = parseColor(options.colors[i]); + + // vary color if needed + var sign = variation % 2 == 1 ? -1 : 1; + var factor = 1 + sign * Math.ceil(variation / 2) * 0.2; + c.scale(factor, factor, factor); + + // 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(); + + // copy the rest + s.lines = $.extend(true, {}, options.lines, s.lines); + s.points = $.extend(true, {}, options.points, s.points); + s.bars = $.extend(true, {}, options.bars, s.bars); + if (s.shadowSize == null) + s.shadowSize = options.shadowSize; + if (s.xaxis && s.xaxis == 2) + s.xaxis = axes.x2axis; + else + s.xaxis = axes.xaxis; + if (s.yaxis && s.yaxis == 2) + s.yaxis = axes.y2axis; + else + s.yaxis = axes.yaxis; + } + } + + function processData() { + var topSentry = Number.POSITIVE_INFINITY, + bottomSentry = Number.NEGATIVE_INFINITY, + axis; + + for (axis in axes) { + axes[axis].datamin = topSentry; + axes[axis].datamax = bottomSentry; + axes[axis].used = false; + } + + for (var i = 0; i < series.length; ++i) { + var data = series[i].data, + axisx = series[i].xaxis, + axisy = series[i].yaxis, + mindelta = 0, maxdelta = 0; + + // make sure we got room for the bar + if (series[i].bars.show) { + mindelta = series[i].bars.align == "left" ? 0 : -series[i].bars.barWidth/2; + maxdelta = mindelta + series[i].bars.barWidth; + } + + axisx.used = axisy.used = true; + for (var j = 0; j < data.length; ++j) { + if (data[j] == null) + continue; + + var x = data[j][0], y = data[j][1]; + + // convert to number + if (x != null && !isNaN(x = +x)) { + if (x + mindelta < axisx.datamin) + axisx.datamin = x + mindelta; + if (x + maxdelta > axisx.datamax) + axisx.datamax = x + maxdelta; + } + + if (y != null && !isNaN(y = +y)) { + if (y < axisy.datamin) + axisy.datamin = y; + if (y > axisy.datamax) + axisy.datamax = y; + } + + if (x == null || y == null || isNaN(x) || isNaN(y)) + data[j] = null; // mark this point as invalid + } + } + + for (axis in axes) { + if (axes[axis].datamin == topSentry) + axes[axis].datamin = 0; + if (axes[axis].datamax == bottomSentry) + axes[axis].datamax = 1; + } + } + + function constructCanvas() { + canvasWidth = target.width(); + canvasHeight = target.height(); + target.html(""); // clear target + target.css("position", "relative"); // for positioning labels and overlay + + if (canvasWidth <= 0 || canvasHeight <= 0) + throw "Invalid dimensions for plot, width = " + canvasWidth + ", height = " + canvasHeight; + + // the canvas + canvas = $('').appendTo(target).get(0); + if ($.browser.msie) // excanvas hack + canvas = window.G_vmlCanvasManager.initElement(canvas); + ctx = canvas.getContext("2d"); + + // overlay canvas for interactive features + overlay = $('').appendTo(target).get(0); + if ($.browser.msie) // excanvas hack + overlay = window.G_vmlCanvasManager.initElement(overlay); + 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]); + + // bind events + if (options.selection.mode != null || options.grid.hoverable) { + // FIXME: temp. work-around until jQuery bug 1871 is fixed + eventHolder.each(function () { + this.onmousemove = onMouseMove; + }); + + if (options.selection.mode != null) + eventHolder.mousedown(onMouseDown); + } + + if (options.grid.clickable) + eventHolder.click(onClick); + } + + function setupGrid() { + function setupAxis(axis, options) { + setRange(axis, options); + prepareTickGeneration(axis, options); + setTicks(axis, options); + // add transformation helpers + if (axis == axes.xaxis || axis == axes.x2axis) { + // data point to canvas coordinate + axis.p2c = function (p) { return (p - axis.min) * axis.scale; }; + // canvas coordinate to data point + axis.c2p = function (c) { return axis.min + c / axis.scale; }; + } + else { + axis.p2c = function (p) { return (axis.max - p) * axis.scale; }; + axis.c2p = function (p) { return axis.max - p / axis.scale; }; + } + } + + for (var axis in axes) + setupAxis(axes[axis], options[axis]); + + setSpacing(); + insertLabels(); + insertLegend(); + } + + function setRange(axis, axisOptions) { + var min = axisOptions.min != null ? axisOptions.min : axis.datamin; + var max = axisOptions.max != null ? axisOptions.max : axis.datamax; + + if (max - min == 0.0) { + // degenerate case + var widen; + if (max == 0.0) + widen = 1.0; + else + widen = 0.01; + + min -= widen; + max += widen; + } + else { + // consider autoscaling + var margin = axisOptions.autoscaleMargin; + if (margin != null) { + if (axisOptions.min == null) { + min -= (max - min) * margin; + // make sure we don't go below zero if all values + // are positive + if (min < 0 && axis.datamin >= 0) + min = 0; + } + if (axisOptions.max == null) { + max += (max - min) * margin; + if (max > 0 && 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) + noTicks = canvasWidth / 100; + else + noTicks = canvasHeight / 60; + + var delta = (axis.max - axis.min) / noTicks; + var size, generator, unit, formatter, i, magn, norm; + + if (axisOptions.mode == "time") { + // pretty handling of time + + function formatDate(d, fmt, monthNames) { + var leftPad = function(n) { + n = "" + n; + return n.length == 1 ? "0" + n : n; + }; + + var r = []; + var escape = false; + if (monthNames == null) + monthNames = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; + for (var i = 0; i < fmt.length; ++i) { + var c = fmt.charAt(i); + + if (escape) { + switch (c) { + case 'h': c = "" + d.getUTCHours(); break; + case 'H': c = leftPad(d.getUTCHours()); 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; + } + r.push(c); + escape = false; + } + else { + if (c == "%") + escape = true; + else + r.push(c); + } + } + return r.join(""); + } + + + // 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 formatDate(d, axisOptions.timeformat, axisOptions.monthNames); + + var t = axis.tickSize[0] * timeUnitSize[axis.tickSize[1]]; + var span = axis.max - axis.min; + + if (t < timeUnitSize.minute) + fmt = "%h:%M:%S"; + else if (t < timeUnitSize.day) { + if (span < 2 * timeUnitSize.day) + fmt = "%h:%M"; + else + fmt = "%b %d %h:%M"; + } + 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 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; + if (axisOptions.labelWidth != null) + axis.labelWidth = axisOptions.labelWidth; + if (axisOptions.labelHeight != null) + axis.labelHeight = axisOptions.labelHeight; + } + + 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.min(axis.max, axis.ticks[axis.ticks.length - 1].v); + } + } + + function setSpacing() { + function measureXLabels(axis) { + // 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 / 6; + + // 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('
' + l + '
'); + } + + axis.labelHeight = 0; + if (labels.length > 0) { + var dummyDiv = $('
' + + labels.join("") + '
').appendTo(target); + axis.labelHeight = dummyDiv.height(); + dummyDiv.remove(); + } + } + } + + function measureYLabels(axis) { + if (axis.labelWidth == null || axis.labelHeight == null) { + var i, labels = [], l; + // calculate y label dimensions + for (i = 0; i < axis.ticks.length; ++i) { + l = axis.ticks[i].label; + if (l) + labels.push('
' + l + '
'); + } + + if (labels.length > 0) { + var dummyDiv = $('
' + + labels.join("") + '
').appendTo(target); + 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; + } + } + + measureXLabels(axes.xaxis); + measureYLabels(axes.yaxis); + measureXLabels(axes.x2axis); + measureYLabels(axes.y2axis); + + // get the most space needed around the grid for things + // that may stick out + var maxOutset = options.grid.borderWidth / 2; + 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; + + if (axes.xaxis.labelHeight > 0) + plotOffset.bottom = Math.max(maxOutset, axes.xaxis.labelHeight + options.grid.labelMargin); + if (axes.yaxis.labelWidth > 0) + plotOffset.left = Math.max(maxOutset, axes.yaxis.labelWidth + options.grid.labelMargin); + + if (axes.x2axis.labelHeight > 0) + plotOffset.top = Math.max(maxOutset, axes.x2axis.labelHeight + options.grid.labelMargin); + + if (axes.y2axis.labelWidth > 0) + plotOffset.right = Math.max(maxOutset, axes.y2axis.labelWidth + options.grid.labelMargin); + + plotWidth = canvasWidth - plotOffset.left - plotOffset.right; + plotHeight = canvasHeight - plotOffset.bottom - plotOffset.top; + + // precompute how much the axis is scaling a point in canvas space + axes.xaxis.scale = plotWidth / (axes.xaxis.max - axes.xaxis.min); + axes.yaxis.scale = plotHeight / (axes.yaxis.max - axes.yaxis.min); + axes.x2axis.scale = plotWidth / (axes.x2axis.max - axes.x2axis.min); + axes.y2axis.scale = plotHeight / (axes.y2axis.max - axes.y2axis.min); + } + + function draw() { + drawGrid(); + for (var i = 0; i < series.length; i++) { + drawSeries(series[i]); + } + } + + 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.clearRect(0, 0, canvasWidth, canvasHeight); + ctx.translate(plotOffset.left, plotOffset.top); + + // draw background, if any + if (options.grid.backgroundColor) { + ctx.fillStyle = options.grid.backgroundColor; + ctx.fillRect(0, 0, plotWidth, plotHeight); + } + + // draw markings + if (options.grid.markings) { + var markings = options.grid.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.strokeStyle = m.color || options.grid.markingsColor; + ctx.lineWidth = m.lineWidth || options.grid.markingsLineWidth; + ctx.moveTo(Math.floor(xrange.from), Math.floor(yrange.from)); + ctx.lineTo(Math.floor(xrange.to), Math.floor(yrange.to)); + ctx.stroke(); + } + else { + // fill area + ctx.fillStyle = m.color || options.grid.markingsColor; + ctx.fillRect(Math.floor(xrange.from), + Math.floor(yrange.to), + Math.floor(xrange.to - xrange.from), + Math.floor(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 + ctx.lineWidth = options.grid.borderWidth; + ctx.strokeStyle = options.grid.color; + ctx.lineJoin = "round"; + ctx.strokeRect(0, 0, plotWidth, plotHeight); + } + + ctx.restore(); + } + + function insertLabels() { + target.find(".tickLabels").remove(); + + var html = '
'; + + 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 += labelGenerator(tick, axis); + } + } + + addLabels(axes.xaxis, function (tick, axis) { + return '
' + tick.label + "
"; + }); + + + addLabels(axes.yaxis, function (tick, axis) { + return '
' + tick.label + "
"; + }); + + addLabels(axes.x2axis, function (tick, axis) { + return '
' + tick.label + "
"; + }); + + addLabels(axes.y2axis, function (tick, axis) { + return '
' + tick.label + "
"; + }); + + html += '
'; + + target.append(html); + } + + function drawSeries(series) { + if (series.lines.show || (!series.bars.show && !series.points.show)) + drawSeriesLines(series); + if (series.bars.show) + drawSeriesBars(series); + if (series.points.show) + drawSeriesPoints(series); + } + + function drawSeriesLines(series) { + function plotLine(data, offset, axisx, axisy) { + var prev, cur = null, drawx = null, drawy = null; + + ctx.beginPath(); + for (var i = 0; i < data.length; ++i) { + prev = cur; + cur = data[i]; + + if (prev == null || cur == null) + continue; + + var x1 = prev[0], y1 = prev[1], + x2 = cur[0], y2 = cur[1]; + + // 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 (drawx != axisx.p2c(x1) || drawy != axisy.p2c(y1) + offset) + ctx.moveTo(axisx.p2c(x1), axisy.p2c(y1) + offset); + + drawx = axisx.p2c(x2); + drawy = axisy.p2c(y2) + offset; + ctx.lineTo(drawx, drawy); + } + ctx.stroke(); + } + + function plotLineArea(data, axisx, axisy) { + var prev, cur = null; + + var bottom = Math.min(Math.max(0, axisy.min), axisy.max); + var top, lastX = 0; + + var areaOpen = false; + + for (var i = 0; i < data.length; ++i) { + prev = cur; + cur = data[i]; + + if (areaOpen && prev != null && cur == null) { + // close area + ctx.lineTo(axisx.p2c(lastX), axisy.p2c(bottom)); + ctx.fill(); + areaOpen = false; + continue; + } + + if (prev == null || cur == null) + continue; + + var x1 = prev[0], y1 = prev[1], + x2 = cur[0], y2 = cur[1]; + + // 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 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(x2old), axisy.p2c(top)); + ctx.lineTo(axisx.p2c(x2), 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; + var sw = series.shadowSize; + // FIXME: consider another form of shadow when filling is turned on + if (sw > 0) { + // draw shadow in two steps + ctx.lineWidth = sw / 2; + ctx.strokeStyle = "rgba(0,0,0,0.1)"; + plotLine(series.data, lw/2 + sw/2 + ctx.lineWidth/2, series.xaxis, series.yaxis); + + ctx.lineWidth = sw / 2; + ctx.strokeStyle = "rgba(0,0,0,0.2)"; + plotLine(series.data, lw/2 + ctx.lineWidth/2, series.xaxis, series.yaxis); + } + + ctx.lineWidth = lw; + ctx.strokeStyle = series.color; + setFillStyle(series.lines, series.color); + if (series.lines.fill) + plotLineArea(series.data, series.xaxis, series.yaxis); + plotLine(series.data, 0, series.xaxis, series.yaxis); + ctx.restore(); + } + + function drawSeriesPoints(series) { + function plotPoints(data, radius, fill, axisx, axisy) { + for (var i = 0; i < data.length; ++i) { + if (data[i] == null) + continue; + + var x = data[i][0], y = data[i][1]; + if (x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max) + continue; + + ctx.beginPath(); + ctx.arc(axisx.p2c(x), axisy.p2c(y), radius, 0, 2 * Math.PI, true); + if (fill) + ctx.fill(); + ctx.stroke(); + } + } + + function plotPointShadows(data, offset, radius, axisx, axisy) { + for (var i = 0; i < data.length; ++i) { + if (data[i] == null) + continue; + + var x = data[i][0], y = data[i][1]; + if (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, Math.PI, false); + ctx.stroke(); + } + } + + ctx.save(); + ctx.translate(plotOffset.left, plotOffset.top); + + var lw = series.lines.lineWidth; + var sw = series.shadowSize; + if (sw > 0) { + // draw shadow in two steps + ctx.lineWidth = sw / 2; + ctx.strokeStyle = "rgba(0,0,0,0.1)"; + plotPointShadows(series.data, sw/2 + ctx.lineWidth/2, + series.points.radius, series.xaxis, series.yaxis); + + ctx.lineWidth = sw / 2; + ctx.strokeStyle = "rgba(0,0,0,0.2)"; + plotPointShadows(series.data, ctx.lineWidth/2, + series.points.radius, series.xaxis, series.yaxis); + } + + ctx.lineWidth = series.points.lineWidth; + ctx.strokeStyle = series.color; + setFillStyle(series.points, series.color); + plotPoints(series.data, series.points.radius, series.points.fill, + series.xaxis, series.yaxis); + ctx.restore(); + } + + function drawBar(x, y, barLeft, barRight, offset, fill, axisx, axisy, c) { + var drawLeft = true, drawRight = true, + drawTop = true, drawBottom = false, + left = x + barLeft, right = x + barRight, + bottom = 0, top = y; + + // account for negative bars + if (top < bottom) { + top = 0; + bottom = y; + 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; + } + + // fill the bar + if (fill) { + c.beginPath(); + c.moveTo(axisx.p2c(left), axisy.p2c(bottom) + offset); + c.lineTo(axisx.p2c(left), axisy.p2c(top) + offset); + c.lineTo(axisx.p2c(right), axisy.p2c(top) + offset); + c.lineTo(axisx.p2c(right), axisy.p2c(bottom) + offset); + c.fill(); + } + + // draw outline + if (drawLeft || drawRight || drawTop || drawBottom) { + c.beginPath(); + left = axisx.p2c(left); + bottom = axisy.p2c(bottom); + right = axisx.p2c(right); + top = axisy.p2c(top); + + 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(data, barLeft, barRight, offset, fill, axisx, axisy) { + for (var i = 0; i < data.length; i++) { + if (data[i] == null) + continue; + drawBar(data[i][0], data[i][1], barLeft, barRight, offset, fill, axisx, axisy, ctx); + } + } + + ctx.save(); + ctx.translate(plotOffset.left, plotOffset.top); + ctx.lineJoin = "round"; + + // FIXME: figure out a way to add shadows + /* + var bw = series.bars.barWidth; + var lw = series.bars.lineWidth; + var sw = series.shadowSize; + if (sw > 0) { + // draw shadow in two steps + ctx.lineWidth = sw / 2; + ctx.strokeStyle = "rgba(0,0,0,0.1)"; + plotBars(series.data, bw, lw/2 + sw/2 + ctx.lineWidth/2, false); + + ctx.lineWidth = sw / 2; + ctx.strokeStyle = "rgba(0,0,0,0.2)"; + plotBars(series.data, bw, lw/2 + ctx.lineWidth/2, false); + }*/ + + ctx.lineWidth = series.bars.lineWidth; + ctx.strokeStyle = series.color; + setFillStyle(series.bars, series.color); + var barLeft = series.bars.align == "left" ? 0 : -series.bars.barWidth/2; + plotBars(series.data, barLeft, barLeft + series.bars.barWidth, 0, series.bars.fill, series.xaxis, series.yaxis); + ctx.restore(); + } + + function setFillStyle(obj, seriesColor) { + var fill = obj.fill; + if (!fill) + return; + + if (obj.fillColor) + ctx.fillStyle = obj.fillColor; + else { + var c = parseColor(seriesColor); + c.a = typeof fill == "number" ? fill : 0.4; + c.normalize(); + ctx.fillStyle = c.toString(); + } + } + + function insertLegend() { + target.find(".legend").remove(); + + if (!options.legend.show) + return; + + var fragments = []; + var rowStarted = false; + for (i = 0; i < series.length; ++i) { + if (!series[i].label) + continue; + + if (i % options.legend.noColumns == 0) { + if (rowStarted) + fragments.push(''); + fragments.push(''); + rowStarted = true; + } + + var label = series[i].label; + if (options.legend.labelFormatter != null) + label = options.legend.labelFormatter(label); + + fragments.push( + '
' + + '' + label + ''); + } + if (rowStarted) + fragments.push(''); + + if (fragments.length == 0) + return; + + var table = '' + fragments.join("") + '
'; + if (options.legend.container != null) + options.legend.container.html(table); + else { + var pos = ""; + var p = options.legend.position, m = options.legend.margin; + if (p.charAt(0) == "n") + pos += 'top:' + (m + plotOffset.top) + 'px;'; + else if (p.charAt(0) == "s") + pos += 'bottom:' + (m + plotOffset.bottom) + 'px;'; + if (p.charAt(1) == "e") + pos += 'right:' + (m + plotOffset.right) + 'px;'; + else if (p.charAt(1) == "w") + pos += 'left:' + (m + plotOffset.left) + 'px;'; + var legend = $('
' + table.replace('style="', 'style="position:absolute;' + pos +';') + '
').appendTo(target); + 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) { + var tmp; + if (options.grid.backgroundColor) + tmp = options.grid.backgroundColor; + else + tmp = extractColor(legend); + c = parseColor(tmp).adjust(null, null, null, 1).toString(); + } + var div = legend.children(); + $('
').prependTo(legend).css('opacity', options.legend.backgroundOpacity); + + } + } + } + + + // interactive features + + var lastMousePos = { pageX: null, pageY: null }, + selection = { + first: { x: -1, y: -1}, second: { x: -1, y: -1}, + show: false, active: false }, + highlights = [], + clickIsMouseUp = false, + redrawTimeout = null, + hoverTimeout = null; + + // Returns the data item the mouse is over, or null if none is found + function findNearbyItem(mouseX, mouseY) { + var maxDistance = options.grid.mouseActiveRadius, + lowestDistance = maxDistance * maxDistance + 1, + item = null, foundPoint = false; + + function result(i, j) { + return { datapoint: series[i].data[j], + dataIndex: j, + series: series[i], + seriesIndex: i }; + } + + for (var i = 0; i < series.length; ++i) { + var data = series[i].data, + axisx = series[i].xaxis, + axisy = series[i].yaxis, + + // precompute some stuff to make the loop faster + mx = axisx.c2p(mouseX), + my = axisy.c2p(mouseY), + maxx = maxDistance / axisx.scale, + maxy = maxDistance / axisy.scale, + checkbar = series[i].bars.show, + checkpoint = !(series[i].bars.show && !(series[i].lines.show || series[i].points.show)), + barLeft = series[i].bars.align == "left" ? 0 : -series[i].bars.barWidth/2, + barRight = barLeft + series[i].bars.barWidth; + for (var j = 0; j < data.length; ++j) { + if (data[j] == null) + continue; + + var x = data[j][0], y = data[j][1]; + + if (checkbar) { + // For a bar graph, the cursor must be inside the bar + // and no other point can be nearby + if (!foundPoint && mx >= x + barLeft && + mx <= x + barRight && + my >= Math.min(0, y) && my <= Math.max(0, y)) + item = result(i, j); + } + + if (checkpoint) { + // For points and lines, the cursor must be within a + // certain distance to the data point + + // check bounding box first + 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 scale 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; + if (dist < lowestDistance) { + lowestDistance = dist; + foundPoint = true; + item = result(i, j); + } + } + } + } + + return item; + } + + function onMouseMove(ev) { + // FIXME: temp. work-around until jQuery bug 1871 is fixed + var e = ev || window.event; + if (e.pageX == null && e.clientX != null) { + var de = document.documentElement, b = document.body; + lastMousePos.pageX = e.clientX + (de && de.scrollLeft || b.scrollLeft || 0); + lastMousePos.pageY = e.clientY + (de && de.scrollTop || b.scrollTop || 0); + } + else { + lastMousePos.pageX = e.pageX; + lastMousePos.pageY = e.pageY; + } + + if (options.grid.hoverable && !hoverTimeout) + hoverTimeout = setTimeout(onHover, 100); + + if (selection.active) + updateSelection(lastMousePos); + } + + function onMouseDown(e) { + if (e.which != 1) // only accept left-click + return; + + // cancel out any text selections + document.body.focus(); + + // prevent text selection and drag in old-school browsers + if (document.onselectstart !== undefined && workarounds.onselectstart == null) { + workarounds.onselectstart = document.onselectstart; + document.onselectstart = function () { return false; }; + } + if (document.ondrag !== undefined && workarounds.ondrag == null) { + workarounds.ondrag = document.ondrag; + document.ondrag = function () { return false; }; + } + + setSelectionPos(selection.first, e); + + lastMousePos.pageX = null; + selection.active = true; + $(document).one("mouseup", onSelectionMouseUp); + } + + function onClick(e) { + if (clickIsMouseUp) { + clickIsMouseUp = false; + return; + } + + triggerClickHoverEvent("plotclick", e); + } + + function onHover() { + triggerClickHoverEvent("plothover", lastMousePos); + hoverTimeout = null; + } + + // trigger click or hover event (they send the same parameters + // so we share their code) + function triggerClickHoverEvent(eventname, event) { + 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); + + 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) { + for (var i = 0; i < highlights.length; ++i) { + var h = highlights[i]; + if (h.auto && + !(item && h.series == item.series && h.point == item.datapoint)) + unhighlight(h.series, h.point); + } + + if (item) + highlight(item.series, item.datapoint, true); + } + + target.trigger(eventname, [ pos, item ]); + } + + function triggerRedrawOverlay() { + if (!redrawTimeout) + redrawTimeout = setTimeout(redrawOverlay, 50); + } + + function redrawOverlay() { + redrawTimeout = null; + + // redraw 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(); + + // redraw selection + if (selection.show && selectionIsSane()) { + octx.strokeStyle = parseColor(options.selection.color).scale(null, null, null, 0.8).toString(); + octx.lineWidth = 1; + ctx.lineJoin = "round"; + octx.fillStyle = parseColor(options.selection.color).scale(null, null, null, 0.4).toString(); + + var x = Math.min(selection.first.x, selection.second.x), + y = Math.min(selection.first.y, selection.second.y), + w = Math.abs(selection.second.x - selection.first.x), + h = Math.abs(selection.second.y - selection.first.y); + + octx.fillRect(x + plotOffset.left, y + plotOffset.top, w, h); + octx.strokeRect(x + plotOffset.left, y + plotOffset.top, w, h); + } + } + + 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 (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 = parseColor(series.color).scale(1, 1, 1, 0.5).toString(); + var radius = 1.5 * pointRadius; + octx.beginPath(); + octx.arc(axisx.p2c(x), axisy.p2c(y), radius, 0, 2 * Math.PI, true); + octx.stroke(); + } + + function drawBarHighlight(series, point) { + octx.lineJoin = "round"; + octx.lineWidth = series.bars.lineWidth; + octx.strokeStyle = parseColor(series.color).scale(1, 1, 1, 0.5).toString(); + octx.fillStyle = parseColor(series.color).scale(1, 1, 1, 0.5).toString(); + var barLeft = series.bars.align == "left" ? 0 : -series.bars.barWidth/2; + drawBar(point[0], point[1], barLeft, barLeft + series.bars.barWidth, + 0, true, series.xaxis, series.yaxis, octx); + } + + function triggerSelectedEvent() { + var x1 = Math.min(selection.first.x, selection.second.x), + x2 = Math.max(selection.first.x, selection.second.x), + y1 = Math.max(selection.first.y, selection.second.y), + y2 = Math.min(selection.first.y, selection.second.y); + + var r = {}; + if (axes.xaxis.used) + r.xaxis = { from: axes.xaxis.c2p(x1), to: axes.xaxis.c2p(x2) }; + if (axes.x2axis.used) + r.x2axis = { from: axes.x2axis.c2p(x1), to: axes.x2axis.c2p(x2) }; + if (axes.yaxis.used) + r.yaxis = { from: axes.yaxis.c2p(y1), to: axes.yaxis.c2p(y2) }; + if (axes.y2axis.used) + r.yaxis = { from: axes.y2axis.c2p(y1), to: axes.y2axis.c2p(y2) }; + + target.trigger("plotselected", [ r ]); + + // backwards-compat stuff, to be removed in future + if (axes.xaxis.used && axes.yaxis.used) + target.trigger("selected", [ { x1: r.xaxis.from, y1: r.yaxis.from, x2: r.xaxis.to, y2: r.yaxis.to } ]); + } + + function onSelectionMouseUp(e) { + // revert drag stuff for old-school browsers + if (document.onselectstart !== undefined) + document.onselectstart = workarounds.onselectstart; + if (document.ondrag !== undefined) + document.ondrag = workarounds.ondrag; + + // no more draggy-dee-drag + selection.active = false; + updateSelection(e); + + if (selectionIsSane()) { + triggerSelectedEvent(); + clickIsMouseUp = true; + } + + return false; + } + + function setSelectionPos(pos, e) { + var offset = eventHolder.offset(); + if (options.selection.mode == "y") { + if (pos == selection.first) + pos.x = 0; + else + pos.x = plotWidth; + } + else { + pos.x = e.pageX - offset.left - plotOffset.left; + pos.x = Math.min(Math.max(0, pos.x), plotWidth); + } + + if (options.selection.mode == "x") { + if (pos == selection.first) + pos.y = 0; + else + pos.y = plotHeight; + } + else { + pos.y = e.pageY - offset.top - plotOffset.top; + pos.y = Math.min(Math.max(0, pos.y), plotHeight); + } + } + + function updateSelection(pos) { + if (pos.pageX == null) + return; + + setSelectionPos(selection.second, pos); + if (selectionIsSane()) { + selection.show = true; + triggerRedrawOverlay(); + } + else + clearSelection(); + } + + function clearSelection() { + if (selection.show) { + selection.show = false; + triggerRedrawOverlay(); + } + } + + function setSelection(ranges, preventEvent) { + var range; + + if (options.selection.mode == "y") { + selection.first.x = 0; + selection.second.x = plotWidth; + } + else { + range = extractRange(ranges, "x"); + + selection.first.x = range.axis.p2c(range.from); + selection.second.x = range.axis.p2c(range.to); + } + + if (options.selection.mode == "x") { + selection.first.y = 0; + selection.second.y = plotHeight; + } + else { + range = extractRange(ranges, "y"); + + selection.first.y = range.axis.p2c(range.from); + selection.second.y = range.axis.p2c(range.to); + } + + selection.show = true; + triggerRedrawOverlay(); + if (!preventEvent) + triggerSelectedEvent(); + } + + function selectionIsSane() { + var minSize = 5; + return Math.abs(selection.second.x - selection.first.x) >= minSize && + Math.abs(selection.second.y - selection.first.y) >= minSize; + } + } + + $.plot = function(target, data, options) { + var plot = new Plot(target, data, options); + /*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; + }; + + // round to nearby lower multiple of base + function floorInBase(n, base) { + return base * Math.floor(n / base); + } + + function clamp(min, value, max) { + if (value < min) + return value; + else if (value > max) + return max; + else + return value; + } + + // color helpers, inspiration from the jquery color animation + // plugin by John Resig + function Color (r, g, b, a) { + + var rgba = ['r','g','b','a']; + var x = 4; //rgba.length + + while (-1<--x) { + this[rgba[x]] = arguments[x] || ((x==3) ? 1.0 : 0); + } + + this.toString = function() { + if (this.a >= 1.0) { + return "rgb("+[this.r,this.g,this.b].join(",")+")"; + } else { + return "rgba("+[this.r,this.g,this.b,this.a].join(",")+")"; + } + }; + + this.scale = function(rf, gf, bf, af) { + x = 4; //rgba.length + while (-1<--x) { + if (arguments[x] != null) + this[rgba[x]] *= arguments[x]; + } + return this.normalize(); + }; + + this.adjust = function(rd, gd, bd, ad) { + x = 4; //rgba.length + while (-1<--x) { + if (arguments[x] != null) + this[rgba[x]] += arguments[x]; + } + return this.normalize(); + }; + + this.clone = function() { + return new Color(this.r, this.b, this.g, this.a); + }; + + var limit = function(val,minVal,maxVal) { + return Math.max(Math.min(val, maxVal), minVal); + }; + + this.normalize = function() { + this.r = limit(parseInt(this.r), 0, 255); + this.g = limit(parseInt(this.g), 0, 255); + this.b = limit(parseInt(this.b), 0, 255); + this.a = limit(this.a, 0, 1); + return this; + }; + + this.normalize(); + } + + var lookupColors = { + aqua:[0,255,255], + azure:[240,255,255], + beige:[245,245,220], + black:[0,0,0], + blue:[0,0,255], + brown:[165,42,42], + cyan:[0,255,255], + darkblue:[0,0,139], + darkcyan:[0,139,139], + darkgrey:[169,169,169], + darkgreen:[0,100,0], + darkkhaki:[189,183,107], + darkmagenta:[139,0,139], + darkolivegreen:[85,107,47], + darkorange:[255,140,0], + darkorchid:[153,50,204], + darkred:[139,0,0], + darksalmon:[233,150,122], + darkviolet:[148,0,211], + fuchsia:[255,0,255], + gold:[255,215,0], + green:[0,128,0], + indigo:[75,0,130], + khaki:[240,230,140], + lightblue:[173,216,230], + lightcyan:[224,255,255], + lightgreen:[144,238,144], + lightgrey:[211,211,211], + lightpink:[255,182,193], + lightyellow:[255,255,224], + lime:[0,255,0], + magenta:[255,0,255], + maroon:[128,0,0], + navy:[0,0,128], + olive:[128,128,0], + orange:[255,165,0], + pink:[255,192,203], + purple:[128,0,128], + violet:[128,0,128], + red:[255,0,0], + silver:[192,192,192], + white:[255,255,255], + yellow:[255,255,0] + }; + + function extractColor(element) { + var color, elem = element; + do { + color = elem.css("background-color").toLowerCase(); + // keep going until we find an element that has color, or + // we hit the body + if (color != '' && color != 'transparent') + break; + elem = elem.parent(); + } while (!$.nodeName(elem.get(0), "body")); + + // catch Safari's way of signalling transparent + if (color == "rgba(0, 0, 0, 0)") + return "transparent"; + + return color; + } + + // parse string, returns Color + function parseColor(str) { + var result; + + // Look for rgb(num,num,num) + if (result = /rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(str)) + return new Color(parseInt(result[1], 10), parseInt(result[2], 10), parseInt(result[3], 10)); + + // Look for rgba(num,num,num,num) + if (result = /rgba\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(str)) + return new Color(parseInt(result[1], 10), parseInt(result[2], 10), parseInt(result[3], 10), parseFloat(result[4])); + + // Look for rgb(num%,num%,num%) + if (result = /rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(str)) + return new Color(parseFloat(result[1])*2.55, parseFloat(result[2])*2.55, parseFloat(result[3])*2.55); + + // Look for rgba(num%,num%,num%,num) + if (result = /rgba\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(str)) + return new Color(parseFloat(result[1])*2.55, parseFloat(result[2])*2.55, parseFloat(result[3])*2.55, parseFloat(result[4])); + + // Look for #a0b1c2 + if (result = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(str)) + return new Color(parseInt(result[1], 16), parseInt(result[2], 16), parseInt(result[3], 16)); + + // Look for #fff + if (result = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(str)) + return new Color(parseInt(result[1]+result[1], 16), parseInt(result[2]+result[2], 16), parseInt(result[3]+result[3], 16)); + + // Otherwise, we're most likely dealing with a named color + var name = $.trim(str).toLowerCase(); + if (name == "transparent") + return new Color(255, 255, 255, 0); + else { + result = lookupColors[name]; + return new Color(result[0], result[1], result[2]); + } + } + +})(jQuery); -- cgit v1.2.3