--- /dev/null
+/* 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: {
+ // we don't put in show: false so we can see
+ // whether lines were actively disabled
+ lineWidth: 2, // in pixels
+ fill: false,
+ fillColor: null,
+ steps: false
+ },
+ bars: {
+ show: false,
+ lineWidth: 2, // in pixels
+ barWidth: 1, // in units of the x axis
+ fill: true,
+ fillColor: null,
+ align: "left", // or "center"
+ horizontal: false // when horizontal, left is now top
+ },
+ threshold: null, // or { below: number, color: color spec}
+ 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, // in pixels
+ borderColor: null, // set if different from the grid color
+ markings: null, // array of ranges or fn: axes -> array of ranges
+ markingsColor: "#f4f4f4",
+ markingsLineWidth: 2,
+ // interactive stuff
+ clickable: false,
+ hoverable: false,
+ autoHighlight: true, // highlight in case mouse is near
+ mouseActiveRadius: 10 // how far the mouse can be away to activate an item
+ },
+ selection: {
+ mode: null, // one of null, "x", "y" or "xy"
+ color: "#e8cfac"
+ },
+ crosshair: {
+ mode: null, // one of null, "x", "y" or "xy",
+ color: "#aa0000"
+ },
+ shadowSize: 3
+ },
+ 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.setCrosshair = setCrosshair;
+ this.clearCrosshair = function () { setCrosshair(null); };
+ 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);
+ if (options.grid.borderColor == null)
+ options.grid.borderColor = options.grid.color
+ // backwards compatibility, to be removed in future
+ if (options.xaxis.noTicks && options.xaxis.ticks == null)
+ options.xaxis.ticks = options.xaxis.noTicks;
+ if (options.yaxis.noTicks && options.yaxis.ticks == null)
+ options.yaxis.ticks = options.yaxis.noTicks;
+ if (options.grid.coloredAreas)
+ options.grid.markings = options.grid.coloredAreas;
+ if (options.grid.coloredAreasColor)
+ options.grid.markingsColor = options.grid.coloredAreasColor;
+ }
+
+ 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);
+
+ // turn on lines automatically in case nothing is set
+ if (s.lines.show == null && !s.bars.show && !s.points.show)
+ s.lines.show = true;
+ if (s.shadowSize == null)
+ s.shadowSize = options.shadowSize;
+
+ if (!s.xaxis)
+ s.xaxis = axes.xaxis;
+
+ if (s.xaxis == 1)
+ s.xaxis = axes.xaxis;
+ else if (s.xaxis == 2)
+ s.xaxis = axes.x2axis;
+
+ if (!s.yaxis)
+ s.yaxis = axes.yaxis;
+
+ if (s.yaxis == 1)
+ s.yaxis = axes.yaxis;
+ else if (s.yaxis == 2)
+ s.yaxis = axes.y2axis;
+
+ if (!s.threshold)
+ s.threshold = options.threshold;
+ s.subseries = null;
+ }
+ }
+
+ function processData() {
+ var topSentry = Number.POSITIVE_INFINITY,
+ bottomSentry = Number.NEGATIVE_INFINITY,
+ axis, i, j, k, m, s;
+
+ for (axis in axes) {
+ axes[axis].datamin = topSentry;
+ axes[axis].datamax = bottomSentry;
+ axes[axis].min = options[axis].min;
+ axes[axis].max = options[axis].max;
+ axes[axis].used = false;
+ }
+
+ for (i = 0; i < series.length; ++i) {
+ s = series[i];
+ s.datapoints = { points: [], incr: 2 };
+
+ var data = s.data,
+ points = s.datapoints.points,
+ axisx = s.xaxis, axisy = s.yaxis,
+ xmin = topSentry, xmax = bottomSentry,
+ ymin = topSentry, ymax = bottomSentry,
+ x, y, p, incr, format = [];
+
+ // determine the increment
+ if (s.bars.show) {
+ s.datapoints.incr = 3;
+ format.push({ d: 0 });
+ }
+
+ /*
+ // examine data to find out how to copy
+ for (j = 0; j < data.length; ++j) {
+ }*/
+
+
+ axisx.used = axisy.used = true;
+ incr = s.datapoints.incr;
+
+ for (j = k = 0; j < data.length; ++j, k += incr) {
+ p = data[j];
+ x = null;
+ y = null;
+
+ if (data[j] != null) {
+ x = p[0];
+ y = p[1];
+ }
+
+ // convert to number
+ if (x != null && !isNaN(x = +x)) {
+ if (x < xmin)
+ xmin = x;
+ if (x > xmax)
+ xmax = x
+ }
+ else
+ x = null;
+
+ if (y != null && !isNaN(y = +y)) {
+ if (y < ymin)
+ ymin = y;
+ if (y > ymax)
+ ymax = y;
+ }
+ else
+ y = null;
+
+ if (x == null || y == null)
+ x = y = null; // make sure everything is cleared
+
+ for (m = 2; m < incr; ++m)
+ points[k + m] = p[m] == null ? format[m-2].d : p[m];
+
+ points[k + 1] = y;
+ points[k] = x;
+ }
+
+ 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;
+ }
+ }
+
+ axisx.datamin = Math.min(axisx.datamin, xmin);
+ axisx.datamax = Math.max(axisx.datamax, xmax);
+ axisy.datamin = Math.min(axisy.datamin, ymin);
+ axisy.datamax = Math.max(axisy.datamax, ymax);
+
+
+ // step charts
+ if (s.lines.show && s.lines.steps) {
+ p = [];
+ // copy, inserting extra points to make steps
+ for (j = k = 0; j < points.length; j += incr, k += incr) {
+ x = points[j];
+ y = points[j + 1];
+ if (j > 0
+ && points[j - incr] != null
+ && x != null
+ && points[j - incr + 1] != y) {
+ p[k] = x;
+ p[k + 1] = points[j - incr + 1];
+ k += incr;
+ }
+
+ p[k] = x;
+ p[k + 1] = y;
+ }
+ s.datapoints.linespoints = p;
+ }
+
+ // possibly split data points because of threshold
+ if (s.threshold) {
+ var orig = $.extend({}, s), thresholded = $.extend({}, s);
+ orig.datapoints = { points: [], incr: incr };
+ thresholded.datapoints = { points: [], incr: incr };
+
+ thresholded.color = s.threshold.color;
+
+ var below = s.threshold.below,
+ origpoints = orig.datapoints.points,
+ threspoints = thresholded.datapoints.points;
+
+ // ordinary points
+ for (j = 0; j < points.length; j += incr) {
+ x = points[j];
+ y = points[j + 1];
+
+ if (y < below)
+ p = threspoints;
+ else
+ p = origpoints;
+
+ p.push(x);
+ p.push(y);
+ }
+
+ // possibly split lines
+ if (s.lines.show) {
+ var lp = s.datapoints.linespoints || points;
+
+ origpoints = [];
+ threspoints = [];
+ p = origpoints;
+
+ for (j = 0; j < lp.length; j += incr) {
+ x = lp[j];
+ y = lp[j + 1];
+
+ var prevp = p;
+ if (y != null) {
+ if (y < below)
+ p = threspoints;
+ else
+ p = origpoints;
+ }
+
+ if (p != prevp && x != null && j > 0 && lp[j - incr] != null) {
+ // find intersection and add it to both
+ k = (x - lp[j - incr]) / (y - lp[j - incr + 1]) * (below - y) + x;
+ prevp.push(k);
+ prevp.push(below);
+ p.push(null); // start new segment
+ p.push(null);
+ p.push(k);
+ p.push(below);
+ }
+
+ p.push(x);
+ p.push(y);
+ }
+
+ orig.datapoints.linespoints = origpoints
+ thresholded.datapoints.linespoints = threspoints;
+ }
+
+ s.subseries = [orig, thresholded];
+ }
+ }
+ }
+
+ function constructCanvas() {
+ function makeCanvas(width, height) {
+ var c = document.createElement('canvas');
+ c.width = width;
+ c.height = height;
+ if ($.browser.msie) // excanvas hack
+ c = window.G_vmlCanvasManager.initElement(c);
+ return c;
+ }
+
+ canvasWidth = target.width();
+ canvasHeight = target.height();
+ target.html(""); // clear target
+ if (target.css("position") == 'static')
+ 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 = $(makeCanvas(canvasWidth, canvasHeight)).appendTo(target).get(0);
+ ctx = canvas.getContext("2d");
+
+ // overlay canvas for interactive features
+ overlay = $(makeCanvas(canvasWidth, canvasHeight)).css({ position: 'absolute', left: 0, top: 0 }).appendTo(target).get(0);
+ 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.crosshair.mode != null
+ || options.grid.hoverable) {
+ // FIXME: temp. work-around until jQuery bug 4398 is fixed
+ eventHolder.each(function () {
+ this.onmousemove = onMouseMove;
+ });
+
+ if (options.selection.mode != null)
+ eventHolder.mousedown(onMouseDown);
+ }
+
+ if (options.crosshair.mode != null)
+ eventHolder.mouseout(onMouseOut);
+
+ 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,
+ max = axisOptions.max != null ? +axisOptions.max : axis.datamax;
+
+ // degenerate case
+ if (min == Number.POSITIVE_INFINITY)
+ min = 0;
+ if (max == Number.NEGATIVE_INFINITY)
+ max = 1;
+
+ if (max - min == 0.0) {
+ // degenerate case
+ var widen = max == 0 ? 1 : 0.01;
+
+ if (axisOptions.min == null)
+ min -= widen;
+ // alway widen max if we couldn't widen min to ensure we
+ // don't fall into min == max which doesn't work
+ if (axisOptions.max == null || axisOptions.min != null)
+ max += widen;
+ }
+ else {
+ // consider autoscaling
+ var margin = axisOptions.autoscaleMargin;
+ if (margin != null) {
+ if (axisOptions.min == null) {
+ min -= (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
+
+ // map of app. size of time units in milliseconds
+ var timeUnitSize = {
+ "second": 1000,
+ "minute": 60 * 1000,
+ "hour": 60 * 60 * 1000,
+ "day": 24 * 60 * 60 * 1000,
+ "month": 30 * 24 * 60 * 60 * 1000,
+ "year": 365.2425 * 24 * 60 * 60 * 1000
+ };
+
+
+ // the allowed tick sizes, after 1 year we use
+ // an integer algorithm
+ var spec = [
+ [1, "second"], [2, "second"], [5, "second"], [10, "second"],
+ [30, "second"],
+ [1, "minute"], [2, "minute"], [5, "minute"], [10, "minute"],
+ [30, "minute"],
+ [1, "hour"], [2, "hour"], [4, "hour"],
+ [8, "hour"], [12, "hour"],
+ [1, "day"], [2, "day"], [3, "day"],
+ [0.25, "month"], [0.5, "month"], [1, "month"],
+ [2, "month"], [3, "month"], [6, "month"],
+ [1, "year"]
+ ];
+
+ var minSize = 0;
+ if (axisOptions.minTickSize != null) {
+ if (typeof axisOptions.tickSize == "number")
+ minSize = axisOptions.tickSize;
+ else
+ minSize = axisOptions.minTickSize[0] * timeUnitSize[axisOptions.minTickSize[1]];
+ }
+
+ for (i = 0; i < spec.length - 1; ++i)
+ if (delta < (spec[i][0] * timeUnitSize[spec[i][1]]
+ + spec[i + 1][0] * timeUnitSize[spec[i + 1][1]]) / 2
+ && spec[i][0] * timeUnitSize[spec[i][1]] >= minSize)
+ break;
+ size = spec[i][0];
+ unit = spec[i][1];
+
+ // special-case the possibility of several years
+ if (unit == "year") {
+ magn = Math.pow(10, Math.floor(Math.log(delta / timeUnitSize.year) / Math.LN10));
+ norm = (delta / timeUnitSize.year) / magn;
+ if (norm < 1.5)
+ size = 1;
+ else if (norm < 3)
+ size = 2;
+ else if (norm < 7.5)
+ size = 5;
+ else
+ size = 10;
+
+ size *= magn;
+ }
+
+ if (axisOptions.tickSize) {
+ size = axisOptions.tickSize[0];
+ unit = axisOptions.tickSize[1];
+ }
+
+ generator = function(axis) {
+ var ticks = [],
+ tickSize = axis.tickSize[0], unit = axis.tickSize[1],
+ d = new Date(axis.min);
+
+ var step = tickSize * timeUnitSize[unit];
+
+ if (unit == "second")
+ d.setUTCSeconds(floorInBase(d.getUTCSeconds(), tickSize));
+ if (unit == "minute")
+ d.setUTCMinutes(floorInBase(d.getUTCMinutes(), tickSize));
+ if (unit == "hour")
+ d.setUTCHours(floorInBase(d.getUTCHours(), tickSize));
+ if (unit == "month")
+ d.setUTCMonth(floorInBase(d.getUTCMonth(), tickSize));
+ if (unit == "year")
+ d.setUTCFullYear(floorInBase(d.getUTCFullYear(), tickSize));
+
+ // reset smaller components
+ d.setUTCMilliseconds(0);
+ if (step >= timeUnitSize.minute)
+ d.setUTCSeconds(0);
+ if (step >= timeUnitSize.hour)
+ d.setUTCMinutes(0);
+ if (step >= timeUnitSize.day)
+ d.setUTCHours(0);
+ if (step >= timeUnitSize.day * 4)
+ d.setUTCDate(1);
+ if (step >= timeUnitSize.year)
+ d.setUTCMonth(0);
+
+
+ var carry = 0, v = Number.NaN, prev;
+ do {
+ prev = v;
+ v = d.getTime();
+ ticks.push({ v: v, label: axis.tickFormatter(v, axis) });
+ if (unit == "month") {
+ if (tickSize < 1) {
+ // a bit complicated - we'll divide the month
+ // up but we need to take care of fractions
+ // so we don't end up in the middle of a day
+ d.setUTCDate(1);
+ var start = d.getTime();
+ d.setUTCMonth(d.getUTCMonth() + 1);
+ var end = d.getTime();
+ d.setTime(v + carry * timeUnitSize.hour + (end - start) * tickSize);
+ carry = d.getUTCHours();
+ d.setUTCHours(0);
+ }
+ else
+ d.setUTCMonth(d.getUTCMonth() + tickSize);
+ }
+ else if (unit == "year") {
+ d.setUTCFullYear(d.getUTCFullYear() + tickSize);
+ }
+ else
+ d.setTime(v + step);
+ } while (v < axis.max && v != prev);
+
+ return ticks;
+ };
+
+ formatter = function (v, axis) {
+ var d = new Date(v);
+
+ // first check global format
+ if (axisOptions.timeformat != null)
+ return $.plot.formatDate(d, axisOptions.timeformat, axisOptions.monthNames);
+
+ var t = axis.tickSize[0] * timeUnitSize[axis.tickSize[1]];
+ var span = axis.max - axis.min;
+
+ 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 $.plot.formatDate(d, fmt, axisOptions.monthNames);
+ };
+ }
+ else {
+ // pretty rounding of base-10 numbers
+ var maxDec = axisOptions.tickDecimals;
+ var dec = -Math.floor(Math.log(delta) / Math.LN10);
+ if (maxDec != null && dec > maxDec)
+ dec = maxDec;
+
+ magn = Math.pow(10, -dec);
+ norm = delta / magn; // norm is between 1.0 and 10.0
+
+ if (norm < 1.5)
+ size = 1;
+ else if (norm < 3) {
+ size = 2;
+ // special case for 2.5, requires an extra decimal
+ if (norm > 2.25 && (maxDec == null || dec + 1 <= maxDec)) {
+ size = 2.5;
+ ++dec;
+ }
+ }
+ else if (norm < 7.5)
+ size = 5;
+ else
+ size = 10;
+
+ size *= magn;
+
+ if (axisOptions.minTickSize != null && size < axisOptions.minTickSize)
+ size = axisOptions.minTickSize;
+
+ if (axisOptions.tickSize != null)
+ size = axisOptions.tickSize;
+
+ axis.tickDecimals = Math.max(0, (maxDec != null) ? maxDec : dec);
+
+ generator = function (axis) {
+ var ticks = [];
+
+ // spew out all possible ticks
+ var start = floorInBase(axis.min, axis.tickSize),
+ i = 0, v = Number.NaN, prev;
+ do {
+ prev = v;
+ v = start + i * axis.tickSize;
+ ticks.push({ v: v, label: axis.tickFormatter(v, axis) });
+ ++i;
+ } while (v < axis.max && v != prev);
+ return ticks;
+ };
+
+ formatter = function (v, axis) {
+ return v.toFixed(axis.tickDecimals);
+ };
+ }
+
+ axis.tickSize = unit ? [size, unit] : size;
+ axis.tickGenerator = generator;
+ if ($.isFunction(axisOptions.tickFormatter))
+ axis.tickFormatter = function (v, axis) { return "" + axisOptions.tickFormatter(v, axis); };
+ else
+ axis.tickFormatter = formatter;
+ 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('<div class="tickLabel" style="float:left;width:' + axis.labelWidth + 'px">' + l + '</div>');
+ }
+
+ axis.labelHeight = 0;
+ if (labels.length > 0) {
+ var dummyDiv = $('<div style="position:absolute;top:-10000px;width:10000px;font-size:smaller">'
+ + labels.join("") + '<div style="clear:left"></div></div>').appendTo(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('<div class="tickLabel">' + l + '</div>');
+ }
+
+ if (labels.length > 0) {
+ var dummyDiv = $('<div style="position:absolute;top:-10000px;font-size:smaller">'
+ + labels.join("") + '</div>').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;
+ for (i = 0; i < series.length; ++i)
+ maxOutset = Math.max(maxOutset, 2 * (series[i].points.radius + series[i].points.lineWidth/2));
+
+ plotOffset.left = plotOffset.right = plotOffset.top = plotOffset.bottom = maxOutset;
+
+ var margin = options.grid.labelMargin + options.grid.borderWidth;
+
+ if (axes.xaxis.labelHeight > 0)
+ plotOffset.bottom = Math.max(maxOutset, axes.xaxis.labelHeight + margin);
+ if (axes.yaxis.labelWidth > 0)
+ plotOffset.left = Math.max(maxOutset, axes.yaxis.labelWidth + margin);
+
+ if (axes.x2axis.labelHeight > 0)
+ plotOffset.top = Math.max(maxOutset, axes.x2axis.labelHeight + margin);
+
+ if (axes.y2axis.labelWidth > 0)
+ plotOffset.right = Math.max(maxOutset, axes.y2axis.labelWidth + margin);
+
+ plotWidth = canvasWidth - plotOffset.left - plotOffset.right;
+ plotHeight = canvasHeight - plotOffset.bottom - plotOffset.top;
+
+ // 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) {
+ var s = series[i];
+ if (s.subseries)
+ for (var j = 0; j < s.subseries.length; ++j)
+ drawSeries(s.subseries[j]);
+ else
+ drawSeries(s);
+ }
+ }
+
+ 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 = getColorOrGradient(options.grid.backgroundColor, plotHeight, 0, "rgba(255, 255, 255, 0)");
+ ctx.fillRect(0, 0, plotWidth, plotHeight);
+ }
+
+ // draw markings
+ var markings = options.grid.markings;
+ if (markings) {
+ if ($.isFunction(markings))
+ // xmin etc. are backwards-compatible, to be removed in future
+ markings = markings({ xmin: axes.xaxis.min, xmax: axes.xaxis.max, ymin: axes.yaxis.min, ymax: axes.yaxis.max, xaxis: axes.xaxis, yaxis: axes.yaxis, x2axis: axes.x2axis, y2axis: axes.y2axis });
+
+ for (i = 0; i < markings.length; ++i) {
+ var m = markings[i],
+ xrange = extractRange(m, "x"),
+ yrange = extractRange(m, "y");
+
+ // fill in missing
+ if (xrange.from == null)
+ xrange.from = xrange.axis.min;
+ if (xrange.to == null)
+ xrange.to = xrange.axis.max;
+ if (yrange.from == null)
+ yrange.from = yrange.axis.min;
+ if (yrange.to == null)
+ yrange.to = yrange.axis.max;
+
+ // clip
+ if (xrange.to < xrange.axis.min || xrange.from > xrange.axis.max ||
+ yrange.to < yrange.axis.min || yrange.from > yrange.axis.max)
+ continue;
+
+ xrange.from = Math.max(xrange.from, xrange.axis.min);
+ xrange.to = Math.min(xrange.to, xrange.axis.max);
+ yrange.from = Math.max(yrange.from, yrange.axis.min);
+ yrange.to = Math.min(yrange.to, yrange.axis.max);
+
+ if (xrange.from == xrange.to && yrange.from == yrange.to)
+ continue;
+
+ // then draw
+ xrange.from = xrange.axis.p2c(xrange.from);
+ xrange.to = xrange.axis.p2c(xrange.to);
+ yrange.from = yrange.axis.p2c(yrange.from);
+ yrange.to = yrange.axis.p2c(yrange.to);
+
+ if (xrange.from == xrange.to || yrange.from == yrange.to) {
+ // draw line
+ ctx.strokeStyle = m.color || options.grid.markingsColor;
+ ctx.beginPath();
+ ctx.lineWidth = m.lineWidth || options.grid.markingsLineWidth;
+ //ctx.moveTo(Math.floor(xrange.from), yrange.from);
+ //ctx.lineTo(Math.floor(xrange.to), yrange.to);
+ ctx.moveTo(xrange.from, yrange.from);
+ ctx.lineTo(xrange.to, yrange.to);
+ ctx.stroke();
+ }
+ else {
+ // fill area
+ ctx.fillStyle = m.color || options.grid.markingsColor;
+ ctx.fillRect(xrange.from, yrange.to,
+ xrange.to - xrange.from,
+ yrange.from - yrange.to);
+ }
+ }
+ }
+
+ // draw the inner grid
+ ctx.lineWidth = 1;
+ ctx.strokeStyle = options.grid.tickColor;
+ ctx.beginPath();
+ var v, axis = axes.xaxis;
+ for (i = 0; i < axis.ticks.length; ++i) {
+ v = axis.ticks[i].v;
+ if (v <= axis.min || v >= axes.xaxis.max)
+ continue; // skip those lying on the axes
+
+ ctx.moveTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, 0);
+ ctx.lineTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, plotHeight);
+ }
+
+ axis = axes.yaxis;
+ for (i = 0; i < axis.ticks.length; ++i) {
+ v = axis.ticks[i].v;
+ if (v <= axis.min || v >= axis.max)
+ continue;
+
+ ctx.moveTo(0, Math.floor(axis.p2c(v)) + ctx.lineWidth/2);
+ ctx.lineTo(plotWidth, Math.floor(axis.p2c(v)) + ctx.lineWidth/2);
+ }
+
+ axis = axes.x2axis;
+ for (i = 0; i < axis.ticks.length; ++i) {
+ v = axis.ticks[i].v;
+ if (v <= axis.min || v >= axis.max)
+ continue;
+
+ ctx.moveTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, -5);
+ ctx.lineTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, 5);
+ }
+
+ axis = axes.y2axis;
+ for (i = 0; i < axis.ticks.length; ++i) {
+ v = axis.ticks[i].v;
+ if (v <= axis.min || v >= axis.max)
+ continue;
+
+ ctx.moveTo(plotWidth-5, Math.floor(axis.p2c(v)) + ctx.lineWidth/2);
+ ctx.lineTo(plotWidth+5, Math.floor(axis.p2c(v)) + ctx.lineWidth/2);
+ }
+
+ ctx.stroke();
+
+ if (options.grid.borderWidth) {
+ // draw border
+ var bw = options.grid.borderWidth;
+ ctx.lineWidth = bw;
+ ctx.strokeStyle = options.grid.borderColor;
+ ctx.strokeRect(-bw/2, -bw/2, plotWidth + bw, plotHeight + bw);
+ }
+
+ ctx.restore();
+ }
+
+ function insertLabels() {
+ target.find(".tickLabels").remove();
+
+ var html = ['<div class="tickLabels" style="font-size:smaller;color:' + options.grid.color + '">'];
+
+ function addLabels(axis, labelGenerator) {
+ for (var i = 0; i < axis.ticks.length; ++i) {
+ var tick = axis.ticks[i];
+ if (!tick.label || tick.v < axis.min || tick.v > axis.max)
+ continue;
+ html.push(labelGenerator(tick, axis));
+ }
+ }
+
+ var margin = options.grid.labelMargin + options.grid.borderWidth;
+
+ addLabels(axes.xaxis, function (tick, axis) {
+ return '<div style="position:absolute;top:' + (plotOffset.top + plotHeight + margin) + 'px;left:' + Math.round(plotOffset.left + axis.p2c(tick.v) - axis.labelWidth/2) + 'px;width:' + axis.labelWidth + 'px;text-align:center" class="tickLabel">' + tick.label + "</div>";
+ });
+
+
+ addLabels(axes.yaxis, function (tick, axis) {
+ return '<div style="position:absolute;top:' + Math.round(plotOffset.top + axis.p2c(tick.v) - axis.labelHeight/2) + 'px;right:' + (plotOffset.right + plotWidth + margin) + 'px;width:' + axis.labelWidth + 'px;text-align:right" class="tickLabel">' + tick.label + "</div>";
+ });
+
+ addLabels(axes.x2axis, function (tick, axis) {
+ return '<div style="position:absolute;bottom:' + (plotOffset.bottom + plotHeight + margin) + 'px;left:' + Math.round(plotOffset.left + axis.p2c(tick.v) - axis.labelWidth/2) + 'px;width:' + axis.labelWidth + 'px;text-align:center" class="tickLabel">' + tick.label + "</div>";
+ });
+
+ addLabels(axes.y2axis, function (tick, axis) {
+ return '<div style="position:absolute;top:' + Math.round(plotOffset.top + axis.p2c(tick.v) - axis.labelHeight/2) + 'px;left:' + (plotOffset.left + plotWidth + margin) +'px;width:' + axis.labelWidth + 'px;text-align:left" class="tickLabel">' + tick.label + "</div>";
+ });
+
+ html.push('</div>');
+
+ target.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.linespoints || datapoints.points,
+ incr = datapoints.incr,
+ prevx = null, prevy = null;
+
+ ctx.beginPath();
+ for (var i = incr; i < points.length; i += incr) {
+ var x1 = points[i - incr], y1 = points[i - incr + 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.linespoints || datapoints.points,
+ incr = datapoints.incr,
+ bottom = Math.min(Math.max(0, axisy.min), axisy.max),
+ top, lastX = 0, areaOpen = false;
+
+ for (var i = incr; i < points.length; i += incr) {
+ var x1 = points[i - incr], y1 = points[i - incr + 1],
+ x2 = points[i], y2 = points[i + 1];
+
+ if (areaOpen && x1 != null && x2 == null) {
+ // close area
+ ctx.lineTo(axisx.p2c(lastX), axisy.p2c(bottom));
+ ctx.fill();
+ areaOpen = false;
+ continue;
+ }
+
+ if (x1 == null || x2 == null)
+ continue;
+
+ // clip x values
+
+ // clip with xmin
+ if (x1 <= x2 && x1 < axisx.min) {
+ if (x2 < axisx.min)
+ continue;
+ y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
+ x1 = axisx.min;
+ }
+ else if (x2 <= x1 && x2 < axisx.min) {
+ if (x1 < axisx.min)
+ continue;
+ y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
+ x2 = axisx.min;
+ }
+
+ // clip with xmax
+ if (x1 >= x2 && x1 > axisx.max) {
+ if (x2 > axisx.max)
+ continue;
+ y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
+ x1 = axisx.max;
+ }
+ else if (x2 >= x1 && x2 > axisx.max) {
+ if (x1 > axisx.max)
+ continue;
+ y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
+ x2 = axisx.max;
+ }
+
+ if (!areaOpen) {
+ // open area
+ ctx.beginPath();
+ ctx.moveTo(axisx.p2c(x1), axisy.p2c(bottom));
+ areaOpen = true;
+ }
+
+ // now first check the case where both is outside
+ if (y1 >= axisy.max && y2 >= axisy.max) {
+ ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.max));
+ ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.max));
+ lastX = x2;
+ continue;
+ }
+ else if (y1 <= axisy.min && y2 <= axisy.min) {
+ ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.min));
+ ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.min));
+ lastX = x2;
+ continue;
+ }
+
+ // else it's a bit more complicated, there might
+ // be two rectangles and two triangles we need to fill
+ // in; to find these keep track of the current x values
+ var x1old = x1, x2old = x2;
+
+ // and clip the y values, without shortcutting
+
+ // clip with ymin
+ if (y1 <= y2 && y1 < axisy.min && y2 >= axisy.min) {
+ x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
+ y1 = axisy.min;
+ }
+ else if (y2 <= y1 && y2 < axisy.min && y1 >= axisy.min) {
+ x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
+ y2 = axisy.min;
+ }
+
+ // clip with ymax
+ if (y1 >= y2 && y1 > axisy.max && y2 <= axisy.max) {
+ x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
+ y1 = axisy.max;
+ }
+ else if (y2 >= y1 && y2 > axisy.max && y1 <= axisy.max) {
+ x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
+ y2 = axisy.max;
+ }
+
+
+ // if the x value was changed we got a rectangle
+ // to fill
+ if (x1 != x1old) {
+ if (y1 <= axisy.min)
+ top = axisy.min;
+ else
+ top = axisy.max;
+
+ ctx.lineTo(axisx.p2c(x1old), axisy.p2c(top));
+ ctx.lineTo(axisx.p2c(x1), axisy.p2c(top));
+ }
+
+ // fill the triangles
+ ctx.lineTo(axisx.p2c(x1), axisy.p2c(y1));
+ ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));
+
+ // fill the other rectangle if it's there
+ if (x2 != x2old) {
+ if (y2 <= axisy.min)
+ top = axisy.min;
+ else
+ top = axisy.max;
+
+ ctx.lineTo(axisx.p2c(x2), axisy.p2c(top));
+ ctx.lineTo(axisx.p2c(x2old), axisy.p2c(top));
+ }
+
+ lastX = Math.max(x2, x2old);
+ }
+
+ if (areaOpen) {
+ ctx.lineTo(axisx.p2c(lastX), axisy.p2c(bottom));
+ ctx.fill();
+ }
+ }
+
+ ctx.save();
+ ctx.translate(plotOffset.left, plotOffset.top);
+ ctx.lineJoin = "round";
+
+ var lw = series.lines.lineWidth,
+ sw = series.shadowSize;
+ // FIXME: consider another form of shadow when filling is turned on
+ if (lw > 0 && sw > 0) {
+ // draw shadow as a thick and thin line with transparency
+ ctx.lineWidth = sw;
+ ctx.strokeStyle = "rgba(0,0,0,0.1)";
+ var xoffset = 1;
+ plotLine(series.datapoints, xoffset, Math.sqrt((lw/2 + sw/2)*(lw/2 + sw/2) - xoffset*xoffset), series.xaxis, series.yaxis);
+ ctx.lineWidth = sw/2;
+ plotLine(series.datapoints, xoffset, Math.sqrt((lw/2 + sw/4)*(lw/2 + sw/4) - xoffset*xoffset), series.xaxis, series.yaxis);
+ }
+
+ ctx.lineWidth = lw;
+ ctx.strokeStyle = series.color;
+ var fillStyle = getFillStyle(series.lines, series.color, 0, plotHeight);
+ if (fillStyle) {
+ ctx.fillStyle = fillStyle;
+ plotLineArea(series.datapoints, series.xaxis, series.yaxis);
+ }
+
+ if (lw > 0)
+ plotLine(series.datapoints, 0, 0, series.xaxis, series.yaxis);
+ ctx.restore();
+ }
+
+ function drawSeriesPoints(series) {
+ function plotPoints(datapoints, radius, fillStyle, offset, circumference, axisx, axisy) {
+ var points = datapoints.points, incr = datapoints.incr;
+
+ for (var i = 0; i < points.length; i += incr) {
+ var x = points[i], y = points[i + 1];
+ if (x == null || x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max)
+ continue;
+
+ ctx.beginPath();
+ ctx.arc(axisx.p2c(x), axisy.p2c(y) + offset, radius, 0, circumference, true);
+ if (fillStyle) {
+ ctx.fillStyle = fillStyle;
+ ctx.fill();
+ }
+ ctx.stroke();
+ }
+ }
+
+ ctx.save();
+ ctx.translate(plotOffset.left, plotOffset.top);
+
+ var lw = series.lines.lineWidth,
+ sw = series.shadowSize,
+ radius = series.points.radius;
+ if (lw > 0 && sw > 0) {
+ // draw shadow in two steps
+ var w = sw / 2;
+ ctx.lineWidth = w;
+ ctx.strokeStyle = "rgba(0,0,0,0.1)";
+ plotPoints(series.datapoints, radius, null, w + w/2, 2 * Math.PI,
+ series.xaxis, series.yaxis);
+
+ ctx.strokeStyle = "rgba(0,0,0,0.2)";
+ plotPoints(series.datapoints, radius, null, w/2, 2 * Math.PI,
+ series.xaxis, series.yaxis);
+ }
+
+ ctx.lineWidth = lw;
+ ctx.strokeStyle = series.color;
+ plotPoints(series.datapoints, radius,
+ getFillStyle(series.points, series.color), 0, 2 * Math.PI,
+ series.xaxis, series.yaxis);
+ ctx.restore();
+ }
+
+ function drawBar(x, y, b, barLeft, barRight, offset, fillStyleCallback, axisx, axisy, c, horizontal) {
+ var left, right, bottom, top,
+ drawLeft, drawRight, drawTop, drawBottom,
+ tmp;
+
+ if (horizontal) {
+ drawBottom = drawRight = drawTop = true;
+ drawLeft = false;
+ left = b;
+ right = x;
+ top = y + barLeft;
+ bottom = y + barRight;
+
+ // account for negative bars
+ if (right < left) {
+ tmp = right;
+ right = left;
+ left = tmp;
+ drawLeft = true;
+ drawRight = false;
+ }
+ }
+ else {
+ drawLeft = drawRight = drawTop = true;
+ drawBottom = false;
+ left = x + barLeft;
+ right = x + barRight;
+ bottom = b;
+ top = y;
+
+ // account for negative bars
+ if (top < bottom) {
+ tmp = top;
+ top = bottom;
+ bottom = tmp;
+ drawBottom = true;
+ drawTop = false;
+ }
+ }
+
+ // clip
+ if (right < axisx.min || left > axisx.max ||
+ top < axisy.min || bottom > axisy.max)
+ return;
+
+ if (left < axisx.min) {
+ left = axisx.min;
+ drawLeft = false;
+ }
+
+ if (right > axisx.max) {
+ right = axisx.max;
+ drawRight = false;
+ }
+
+ if (bottom < axisy.min) {
+ bottom = axisy.min;
+ drawBottom = false;
+ }
+
+ if (top > axisy.max) {
+ top = axisy.max;
+ drawTop = false;
+ }
+
+ left = axisx.p2c(left);
+ bottom = axisy.p2c(bottom);
+ right = axisx.p2c(right);
+ top = axisy.p2c(top);
+
+ // fill the bar
+ if (fillStyleCallback) {
+ c.beginPath();
+ c.moveTo(left, bottom);
+ c.lineTo(left, top);
+ c.lineTo(right, top);
+ c.lineTo(right, bottom);
+ c.fillStyle = fillStyleCallback(bottom, top);
+ c.fill();
+ }
+
+ // draw outline
+ if (drawLeft || drawRight || drawTop || drawBottom) {
+ c.beginPath();
+
+ // FIXME: inline moveTo is buggy with excanvas
+ c.moveTo(left, bottom + offset);
+ if (drawLeft)
+ c.lineTo(left, top + offset);
+ else
+ c.moveTo(left, top + offset);
+ if (drawTop)
+ c.lineTo(right, top + offset);
+ else
+ c.moveTo(right, top + offset);
+ if (drawRight)
+ c.lineTo(right, bottom + offset);
+ else
+ c.moveTo(right, bottom + offset);
+ if (drawBottom)
+ c.lineTo(left, bottom + offset);
+ else
+ c.moveTo(left, bottom + offset);
+ c.stroke();
+ }
+ }
+
+ function drawSeriesBars(series) {
+ function plotBars(datapoints, barLeft, barRight, offset, fillStyleCallback, axisx, axisy) {
+ var points = datapoints.points, incr = datapoints.incr;
+
+ for (var i = 0; i < points.length; i += incr) {
+ if (points[i] == null)
+ continue;
+ drawBar(points[i], points[i + 1], points[i + 2], barLeft, barRight, offset, fillStyleCallback, axisx, axisy, ctx, series.bars.horizontal);
+ }
+ }
+
+ ctx.save();
+ ctx.translate(plotOffset.left, plotOffset.top);
+
+ // FIXME: figure out a way to add shadows (for instance along the right edge)
+ ctx.lineWidth = series.bars.lineWidth;
+ ctx.strokeStyle = series.color;
+ var barLeft = series.bars.align == "left" ? 0 : -series.bars.barWidth/2;
+ var fillStyleCallback = series.bars.fill ? function (bottom, top) { return getFillStyle(series.bars, series.color, bottom, top); } : null;
+ plotBars(series.datapoints, barLeft, barLeft + series.bars.barWidth, 0, fillStyleCallback, series.xaxis, series.yaxis);
+ ctx.restore();
+ }
+
+ function getFillStyle(filloptions, seriesColor, bottom, top) {
+ var fill = filloptions.fill;
+ if (!fill)
+ return null;
+
+ if (filloptions.fillColor)
+ return getColorOrGradient(filloptions.fillColor, bottom, top, seriesColor);
+
+ var c = parseColor(seriesColor);
+ c.a = typeof fill == "number" ? fill : 0.4;
+ c.normalize();
+ return c.toString();
+ }
+
+ function insertLegend() {
+ target.find(".legend").remove();
+
+ if (!options.legend.show)
+ return;
+
+ var fragments = [], rowStarted = false,
+ lf = options.legend.labelFormatter, s, label;
+ for (i = 0; i < series.length; ++i) {
+ s = series[i];
+ label = s.label;
+ if (!label)
+ continue;
+
+ if (i % options.legend.noColumns == 0) {
+ if (rowStarted)
+ fragments.push('</tr>');
+ fragments.push('<tr>');
+ rowStarted = true;
+ }
+
+ if (lf)
+ label = lf(label, s);
+
+ fragments.push(
+ '<td class="legendColorBox"><div style="border:1px solid ' + options.legend.labelBoxBorderColor + ';padding:1px"><div style="width:4px;height:0;border:5px solid ' + s.color + ';overflow:hidden"></div></div></td>' +
+ '<td class="legendLabel">' + label + '</td>');
+ }
+ if (rowStarted)
+ fragments.push('</tr>');
+
+ if (fragments.length == 0)
+ return;
+
+ var table = '<table style="font-size:smaller;color:' + options.grid.color + '">' + fragments.join("") + '</table>';
+ if (options.legend.container != null)
+ $(options.legend.container).html(table);
+ else {
+ var pos = "",
+ p = options.legend.position,
+ m = options.legend.margin;
+ if (m[0] == null)
+ m = [m, m];
+ if (p.charAt(0) == "n")
+ pos += 'top:' + (m[1] + plotOffset.top) + 'px;';
+ else if (p.charAt(0) == "s")
+ pos += 'bottom:' + (m[1] + plotOffset.bottom) + 'px;';
+ if (p.charAt(1) == "e")
+ pos += 'right:' + (m[0] + plotOffset.right) + 'px;';
+ else if (p.charAt(1) == "w")
+ pos += 'left:' + (m[0] + plotOffset.left) + 'px;';
+ var legend = $('<div class="legend">' + table.replace('style="', 'style="position:absolute;' + pos +';') + '</div>').appendTo(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 && typeof options.grid.backgroundColor == "string")
+ tmp = options.grid.backgroundColor;
+ else
+ tmp = extractColor(legend);
+ c = parseColor(tmp).adjust(null, null, null, 1).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 lastMousePos = { pageX: null, pageY: null },
+ selection = {
+ first: { x: -1, y: -1}, second: { x: -1, y: -1},
+ show: false, active: false },
+ crosshair = { pos: { x: -1, y: -1 } },
+ 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, seriesFilter) {
+ var maxDistance = options.grid.mouseActiveRadius,
+ lowestDistance = maxDistance * maxDistance + 1,
+ item = null, foundPoint = false, i, j;
+
+ for (var i = 0; i < series.length; ++i) {
+ if (!seriesFilter(series[i]))
+ continue;
+
+ var s = series[i],
+ axisx = s.xaxis,
+ axisy = s.yaxis,
+ points = s.datapoints.points,
+ incr = s.datapoints.incr,
+ mx = axisx.c2p(mouseX), // precompute some stuff to make the loop faster
+ my = axisy.c2p(mouseY),
+ maxx = maxDistance / axisx.scale,
+ maxy = maxDistance / axisy.scale;
+
+ if (s.lines.show || s.points.show) {
+ for (j = 0; j < points.length; j += incr) {
+ 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; // no idea in taking sqrt
+ if (dist < lowestDistance) {
+ lowestDistance = dist;
+ item = [i, j / incr];
+ }
+ }
+ }
+
+ 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 += incr) {
+ 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 / incr];
+ }
+ }
+ }
+
+ if (item) {
+ i = item[0];
+ j = item[1];
+
+ return { datapoint: series[i].data[j],
+ dataIndex: j,
+ series: series[i],
+ seriesIndex: i }
+ }
+
+ return null;
+ }
+
+ function onMouseMove(ev) {
+ // FIXME: temp. work-around until jQuery bug 4398 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) - (de.clientLeft || 0);
+ lastMousePos.pageY = e.clientY + (de && de.scrollTop || b.scrollTop || 0) - (de.clientTop || 0);
+ }
+ else {
+ lastMousePos.pageX = e.pageX;
+ lastMousePos.pageY = e.pageY;
+ }
+
+ if (options.grid.hoverable)
+ triggerClickHoverEvent("plothover", lastMousePos,
+ function (s) { return s["hoverable"] != false; });
+
+ if (options.crosshair.mode != null) {
+ if (!selection.active) {
+ setPositionFromEvent(crosshair.pos, lastMousePos);
+ triggerRedrawOverlay();
+ }
+ else
+ crosshair.pos.x = -1; // hide the crosshair while selecting
+ }
+
+ if (selection.active) {
+ target.trigger("plotselecting", [ selectionIsSane() ? getSelectionForEvent() : null ]);
+
+ 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 onMouseOut(ev) {
+ if (options.crosshair.mode != null && crosshair.pos.x != -1) {
+ crosshair.pos.x = -1;
+ triggerRedrawOverlay();
+ }
+ }
+
+ function onClick(e) {
+ if (clickIsMouseUp) {
+ clickIsMouseUp = false;
+ return;
+ }
+
+ triggerClickHoverEvent("plotclick", e,
+ function (s) { return s["clickable"] != false; });
+ }
+
+ /*
+ function userPositionInCanvasSpace(pos) {
+ return { x: parseInt(pos.x != null ? axes.xaxis.p2c(pos.x) : axes.x2axis.p2c(pos.x2)),
+ y: parseInt(pos.y != null ? axes.yaxis.p2c(pos.y) : axes.y2axis.p2c(pos.y2)) };
+ }
+
+ function positionInDivSpace(pos) {
+ var cpos = userPositionInCanvasSpace(pos);
+ return { x: cpos.x + plotOffset.left,
+ y: cpos.y + plotOffset.top };
+ }*/
+
+ // trigger click or hover event (they send the same parameters
+ // so we share their code)
+ function triggerClickHoverEvent(eventname, event, seriesFilter) {
+ var offset = eventHolder.offset(),
+ pos = { pageX: event.pageX, pageY: event.pageY },
+ canvasX = event.pageX - offset.left - plotOffset.left,
+ canvasY = event.pageY - offset.top - plotOffset.top;
+
+ if (axes.xaxis.used)
+ pos.x = axes.xaxis.c2p(canvasX);
+ if (axes.yaxis.used)
+ pos.y = axes.yaxis.c2p(canvasY);
+ if (axes.x2axis.used)
+ pos.x2 = axes.x2axis.c2p(canvasX);
+ if (axes.y2axis.used)
+ pos.y2 = axes.y2axis.c2p(canvasY);
+
+ var item = findNearbyItem(canvasX, canvasY, seriesFilter);
+
+ if (item) {
+ // fill in mouse pos for any listeners out there
+ item.pageX = parseInt(item.series.xaxis.p2c(item.datapoint[0]) + offset.left + plotOffset.left);
+ item.pageY = parseInt(item.series.yaxis.p2c(item.datapoint[1]) + offset.top + plotOffset.top);
+ }
+
+ if (options.grid.autoHighlight) {
+ // clear auto-highlights
+ for (var i = 0; i < highlights.length; ++i) {
+ var h = highlights[i];
+ if (h.auto == eventname &&
+ !(item && h.series == item.series && h.point == item.datapoint))
+ unhighlight(h.series, h.point);
+ }
+
+ if (item)
+ highlight(item.series, item.datapoint, eventname);
+ }
+
+ target.trigger(eventname, [ pos, item ]);
+ }
+
+ function triggerRedrawOverlay() {
+ if (!redrawTimeout)
+ redrawTimeout = setTimeout(redrawOverlay, 30);
+ }
+
+ 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);
+ }
+
+ // 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, y, w, h);
+ octx.strokeRect(x, y, w, h);
+ }
+
+ // redraw crosshair
+ var pos = crosshair.pos, mode = options.crosshair.mode;
+ if (mode != null && pos.x != -1) {
+ octx.strokeStyle = parseColor(options.crosshair.color).scale(null, null, null, 0.8).toString();
+ octx.lineWidth = 1;
+ ctx.lineJoin = "round";
+
+ octx.beginPath();
+ if (mode.indexOf("x") != -1) {
+ octx.moveTo(pos.x, 0);
+ octx.lineTo(pos.x, plotHeight);
+ }
+ if (mode.indexOf("y") != -1) {
+ octx.moveTo(0, pos.y);
+ octx.lineTo(plotWidth, pos.y);
+ }
+ octx.stroke();
+
+ }
+ octx.restore();
+ }
+
+ 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.lineWidth = series.bars.lineWidth;
+ octx.strokeStyle = parseColor(series.color).scale(1, 1, 1, 0.5).toString();
+ var 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], point[2] || 0, barLeft, barLeft + series.bars.barWidth,
+ 0, function () { return fillStyle; }, series.xaxis, series.yaxis, octx, series.bars.horizontal);
+ }
+
+ function setPositionFromEvent(pos, e) {
+ var offset = eventHolder.offset();
+ pos.x = clamp(0, e.pageX - offset.left - plotOffset.left, plotWidth);
+ pos.y = clamp(0, e.pageY - offset.top - plotOffset.top, plotHeight);
+ }
+
+ function setCrosshair(pos) {
+ if (pos == null)
+ crosshair.pos.x = -1;
+ else {
+ crosshair.pos.x = clamp(0, pos.x != null ? axes.xaxis.p2c(pos.x) : axes.x2axis.p2c(pos.x2), plotWidth);
+ crosshair.pos.y = clamp(0, pos.y != null ? axes.yaxis.p2c(pos.y) : axes.y2axis.p2c(pos.y2), plotHeight);
+ }
+ triggerRedrawOverlay();
+ }
+
+ function getSelectionForEvent() {
+ 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.y2axis = { from: axes.y2axis.c2p(y1), to: axes.y2axis.c2p(y2) };
+ return r;
+ }
+
+ function triggerSelectedEvent() {
+ var r = getSelectionForEvent();
+
+ 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;
+ }
+ else {
+ // this counts as a clear
+ target.trigger("plotunselected", [ ]);
+ target.trigger("plotselecting", [ null ]);
+ }
+
+ return false;
+ }
+
+ function setSelectionPos(pos, e) {
+ setPositionFromEvent(pos, e);
+
+ if (options.selection.mode == "y") {
+ if (pos == selection.first)
+ pos.x = 0;
+ else
+ pos.x = plotWidth;
+ }
+
+ if (options.selection.mode == "x") {
+ if (pos == selection.first)
+ pos.y = 0;
+ else
+ pos.y = plotHeight;
+ }
+ }
+
+ function updateSelection(pos) {
+ if (pos.pageX == null)
+ return;
+
+ setSelectionPos(selection.second, pos);
+ if (selectionIsSane()) {
+ selection.show = true;
+ triggerRedrawOverlay();
+ }
+ else
+ clearSelection(true);
+ }
+
+ function clearSelection(preventEvent) {
+ if (selection.show) {
+ selection.show = false;
+ triggerRedrawOverlay();
+ if (!preventEvent)
+ target.trigger("plotunselected", [ ]);
+ }
+ }
+
+ 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;
+ }
+
+ 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];
+ gradient.addColorStop(i / (l - 1), typeof c == "string" ? c : parseColor(defaultColor).scale(c.brightness, c.brightness, c.brightness, c.opacity));
+ }
+
+ return gradient;
+ }
+ }
+ }
+
+ $.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;
+ };
+
+ // 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;
+ 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("");
+ };
+
+ // 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 min;
+ 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 = clamp(0, parseInt(this.r), 255);
+ this.g = clamp(0, parseInt(this.g), 255);
+ this.b = clamp(0, parseInt(this.b), 255);
+ this.a = clamp(0, this.a, 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);
projects / osqa.git / blobdiff