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-/* 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);
generated by cgit v1.2.3-1-g7c22 (git 2.25.1) at 2024-10-30 20:14:22 +0000