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Diffstat (limited to 'js/plugins/flot/jquery.flot.js')
| -rw-r--r-- | js/plugins/flot/jquery.flot.js | 2599 |
1 files changed, 2599 insertions, 0 deletions
diff --git a/js/plugins/flot/jquery.flot.js b/js/plugins/flot/jquery.flot.js new file mode 100644 index 0000000..78c5718 --- /dev/null +++ b/js/plugins/flot/jquery.flot.js @@ -0,0 +1,2599 @@ +/*! Javascript plotting library for jQuery, v. 0.7.
+ *
+ * Released under the MIT license by IOLA, December 2007.
+ *
+ */
+
+// first an inline dependency, jquery.colorhelpers.js, we inline it here
+// for convenience
+
+/* Plugin for jQuery for working with colors.
+ *
+ * Version 1.1.
+ *
+ * Inspiration from jQuery color animation plugin by John Resig.
+ *
+ * Released under the MIT license by Ole Laursen, October 2009.
+ *
+ * Examples:
+ *
+ * $.color.parse("#fff").scale('rgb', 0.25).add('a', -0.5).toString()
+ * var c = $.color.extract($("#mydiv"), 'background-color');
+ * console.log(c.r, c.g, c.b, c.a);
+ * $.color.make(100, 50, 25, 0.4).toString() // returns "rgba(100,50,25,0.4)"
+ *
+ * Note that .scale() and .add() return the same modified object
+ * instead of making a new one.
+ *
+ * V. 1.1: Fix error handling so e.g. parsing an empty string does
+ * produce a color rather than just crashing.
+ */
+(function(B){B.color={};B.color.make=function(F,E,C,D){var G={};G.r=F||0;G.g=E||0;G.b=C||0;G.a=D!=null?D:1;G.add=function(J,I){for(var H=0;H<J.length;++H){G[J.charAt(H)]+=I}return G.normalize()};G.scale=function(J,I){for(var H=0;H<J.length;++H){G[J.charAt(H)]*=I}return G.normalize()};G.toString=function(){if(G.a>=1){return"rgb("+[G.r,G.g,G.b].join(",")+")"}else{return"rgba("+[G.r,G.g,G.b,G.a].join(",")+")"}};G.normalize=function(){function H(J,K,I){return K<J?J:(K>I?I:K)}G.r=H(0,parseInt(G.r),255);G.g=H(0,parseInt(G.g),255);G.b=H(0,parseInt(G.b),255);G.a=H(0,G.a,1);return G};G.clone=function(){return B.color.make(G.r,G.b,G.g,G.a)};return G.normalize()};B.color.extract=function(D,C){var E;do{E=D.css(C).toLowerCase();if(E!=""&&E!="transparent"){break}D=D.parent()}while(!B.nodeName(D.get(0),"body"));if(E=="rgba(0, 0, 0, 0)"){E="transparent"}return B.color.parse(E)};B.color.parse=function(F){var E,C=B.color.make;if(E=/rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(F)){return C(parseInt(E[1],10),parseInt(E[2],10),parseInt(E[3],10))}if(E=/rgba\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(F)){return C(parseInt(E[1],10),parseInt(E[2],10),parseInt(E[3],10),parseFloat(E[4]))}if(E=/rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(F)){return C(parseFloat(E[1])*2.55,parseFloat(E[2])*2.55,parseFloat(E[3])*2.55)}if(E=/rgba\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(F)){return C(parseFloat(E[1])*2.55,parseFloat(E[2])*2.55,parseFloat(E[3])*2.55,parseFloat(E[4]))}if(E=/#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(F)){return C(parseInt(E[1],16),parseInt(E[2],16),parseInt(E[3],16))}if(E=/#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(F)){return C(parseInt(E[1]+E[1],16),parseInt(E[2]+E[2],16),parseInt(E[3]+E[3],16))}var D=B.trim(F).toLowerCase();if(D=="transparent"){return C(255,255,255,0)}else{E=A[D]||[0,0,0];return C(E[0],E[1],E[2])}};var A={aqua:[0,255,255],azure:[240,255,255],beige:[245,245,220],black:[0,0,0],blue:[0,0,255],brown:[165,42,42],cyan:[0,255,255],darkblue:[0,0,139],darkcyan:[0,139,139],darkgrey:[169,169,169],darkgreen:[0,100,0],darkkhaki:[189,183,107],darkmagenta:[139,0,139],darkolivegreen:[85,107,47],darkorange:[255,140,0],darkorchid:[153,50,204],darkred:[139,0,0],darksalmon:[233,150,122],darkviolet:[148,0,211],fuchsia:[255,0,255],gold:[255,215,0],green:[0,128,0],indigo:[75,0,130],khaki:[240,230,140],lightblue:[173,216,230],lightcyan:[224,255,255],lightgreen:[144,238,144],lightgrey:[211,211,211],lightpink:[255,182,193],lightyellow:[255,255,224],lime:[0,255,0],magenta:[255,0,255],maroon:[128,0,0],navy:[0,0,128],olive:[128,128,0],orange:[255,165,0],pink:[255,192,203],purple:[128,0,128],violet:[128,0,128],red:[255,0,0],silver:[192,192,192],white:[255,255,255],yellow:[255,255,0]}})(jQuery);
+
+// the actual Flot code
+(function($) {
+ function Plot(placeholder, data_, options_, plugins) {
+ // data is on the form:
+ // [ series1, series2 ... ]
+ // where series is either just the data as [ [x1, y1], [x2, y2], ... ]
+ // or { data: [ [x1, y1], [x2, y2], ... ], label: "some label", ... }
+
+ var series = [],
+ options = {
+ // the color theme used for graphs
+ colors: ["#edc240", "#afd8f8", "#cb4b4b", "#4da74d", "#9440ed"],
+ legend: {
+ show: true,
+ noColumns: 1, // number of colums in legend table
+ labelFormatter: null, // fn: string -> string
+ labelBoxBorderColor: "#ccc", // border color for the little label boxes
+ container: null, // container (as jQuery object) to put legend in, null means default on top of graph
+ position: "ne", // position of default legend container within plot
+ margin: 5, // distance from grid edge to default legend container within plot
+ backgroundColor: null, // null means auto-detect
+ backgroundOpacity: 0.85 // set to 0 to avoid background
+ },
+ xaxis: {
+ show: null, // null = auto-detect, true = always, false = never
+ position: "bottom", // or "top"
+ mode: null, // null or "time"
+ color: null, // base color, labels, ticks
+ tickColor: null, // possibly different color of ticks, e.g. "rgba(0,0,0,0.15)"
+ transform: null, // null or f: number -> number to transform axis
+ inverseTransform: null, // if transform is set, this should be the inverse function
+ min: null, // min. value to show, null means set automatically
+ max: null, // max. value to show, null means set automatically
+ autoscaleMargin: null, // margin in % to add if auto-setting min/max
+ ticks: null, // either [1, 3] or [[1, "a"], 3] or (fn: axis info -> ticks) or app. number of ticks for auto-ticks
+ tickFormatter: null, // fn: number -> string
+ labelWidth: null, // size of tick labels in pixels
+ labelHeight: null,
+ reserveSpace: null, // whether to reserve space even if axis isn't shown
+ tickLength: null, // size in pixels of ticks, or "full" for whole line
+ alignTicksWithAxis: null, // axis number or null for no sync
+
+ // mode specific options
+ tickDecimals: null, // no. of decimals, null means auto
+ tickSize: null, // number or [number, "unit"]
+ minTickSize: null, // number or [number, "unit"]
+ monthNames: null, // list of names of months
+ timeformat: null, // format string to use
+ twelveHourClock: false // 12 or 24 time in time mode
+ },
+ yaxis: {
+ autoscaleMargin: 0.02,
+ position: "left" // or "right"
+ },
+ xaxes: [],
+ yaxes: [],
+ series: {
+ points: {
+ show: false,
+ radius: 3,
+ lineWidth: 2, // in pixels
+ fill: true,
+ fillColor: "#ffffff",
+ symbol: "circle" // or callback
+ },
+ lines: {
+ // we don't put in show: false so we can see
+ // whether lines were actively disabled
+ lineWidth: 2, // in pixels
+ fill: false,
+ fillColor: null,
+ steps: false
+ },
+ bars: {
+ show: false,
+ lineWidth: 2, // in pixels
+ barWidth: 1, // in units of the x axis
+ fill: true,
+ fillColor: null,
+ align: "left", // or "center"
+ horizontal: false
+ },
+ shadowSize: 3
+ },
+ grid: {
+ show: true,
+ aboveData: false,
+ color: "#545454", // primary color used for outline and labels
+ backgroundColor: null, // null for transparent, else color
+ borderColor: null, // set if different from the grid color
+ tickColor: null, // color for the ticks, e.g. "rgba(0,0,0,0.15)"
+ labelMargin: 5, // in pixels
+ axisMargin: 8, // in pixels
+ borderWidth: 2, // in pixels
+ minBorderMargin: null, // in pixels, null means taken from points radius
+ markings: null, // array of ranges or fn: axes -> array of ranges
+ markingsColor: "#f4f4f4",
+ markingsLineWidth: 2,
+ // interactive stuff
+ clickable: false,
+ hoverable: false,
+ autoHighlight: true, // highlight in case mouse is near
+ mouseActiveRadius: 10 // how far the mouse can be away to activate an item
+ },
+ hooks: {}
+ },
+ canvas = null, // the canvas for the plot itself
+ overlay = null, // canvas for interactive stuff on top of plot
+ eventHolder = null, // jQuery object that events should be bound to
+ ctx = null, octx = null,
+ xaxes = [], yaxes = [],
+ plotOffset = { left: 0, right: 0, top: 0, bottom: 0},
+ canvasWidth = 0, canvasHeight = 0,
+ plotWidth = 0, plotHeight = 0,
+ hooks = {
+ processOptions: [],
+ processRawData: [],
+ processDatapoints: [],
+ drawSeries: [],
+ draw: [],
+ bindEvents: [],
+ drawOverlay: [],
+ shutdown: []
+ },
+ plot = this;
+
+ // public functions
+ plot.setData = setData;
+ plot.setupGrid = setupGrid;
+ plot.draw = draw;
+ plot.getPlaceholder = function() { return placeholder; };
+ plot.getCanvas = function() { return canvas; };
+ plot.getPlotOffset = function() { return plotOffset; };
+ plot.width = function () { return plotWidth; };
+ plot.height = function () { return plotHeight; };
+ plot.offset = function () {
+ var o = eventHolder.offset();
+ o.left += plotOffset.left;
+ o.top += plotOffset.top;
+ return o;
+ };
+ plot.getData = function () { return series; };
+ plot.getAxes = function () {
+ var res = {}, i;
+ $.each(xaxes.concat(yaxes), function (_, axis) {
+ if (axis)
+ res[axis.direction + (axis.n != 1 ? axis.n : "") + "axis"] = axis;
+ });
+ return res;
+ };
+ plot.getXAxes = function () { return xaxes; };
+ plot.getYAxes = function () { return yaxes; };
+ plot.c2p = canvasToAxisCoords;
+ plot.p2c = axisToCanvasCoords;
+ plot.getOptions = function () { return options; };
+ plot.highlight = highlight;
+ plot.unhighlight = unhighlight;
+ plot.triggerRedrawOverlay = triggerRedrawOverlay;
+ plot.pointOffset = function(point) {
+ return {
+ left: parseInt(xaxes[axisNumber(point, "x") - 1].p2c(+point.x) + plotOffset.left),
+ top: parseInt(yaxes[axisNumber(point, "y") - 1].p2c(+point.y) + plotOffset.top)
+ };
+ };
+ plot.shutdown = shutdown;
+ plot.resize = function () {
+ getCanvasDimensions();
+ resizeCanvas(canvas);
+ resizeCanvas(overlay);
+ };
+
+ // public attributes
+ plot.hooks = hooks;
+
+ // initialize
+ initPlugins(plot);
+ parseOptions(options_);
+ setupCanvases();
+ setData(data_);
+ setupGrid();
+ draw();
+ bindEvents();
+
+
+ function executeHooks(hook, args) {
+ args = [plot].concat(args);
+ for (var i = 0; i < hook.length; ++i)
+ hook[i].apply(this, args);
+ }
+
+ function initPlugins() {
+ for (var i = 0; i < plugins.length; ++i) {
+ var p = plugins[i];
+ p.init(plot);
+ if (p.options)
+ $.extend(true, options, p.options);
+ }
+ }
+
+ function parseOptions(opts) {
+ var i;
+
+ $.extend(true, options, opts);
+
+ if (options.xaxis.color == null)
+ options.xaxis.color = options.grid.color;
+ if (options.yaxis.color == null)
+ options.yaxis.color = options.grid.color;
+
+ if (options.xaxis.tickColor == null) // backwards-compatibility
+ options.xaxis.tickColor = options.grid.tickColor;
+ if (options.yaxis.tickColor == null) // backwards-compatibility
+ options.yaxis.tickColor = options.grid.tickColor;
+
+ if (options.grid.borderColor == null)
+ options.grid.borderColor = options.grid.color;
+ if (options.grid.tickColor == null)
+ options.grid.tickColor = $.color.parse(options.grid.color).scale('a', 0.22).toString();
+
+ // fill in defaults in axes, copy at least always the
+ // first as the rest of the code assumes it'll be there
+ for (i = 0; i < Math.max(1, options.xaxes.length); ++i)
+ options.xaxes[i] = $.extend(true, {}, options.xaxis, options.xaxes[i]);
+ for (i = 0; i < Math.max(1, options.yaxes.length); ++i)
+ options.yaxes[i] = $.extend(true, {}, options.yaxis, options.yaxes[i]);
+
+ // backwards compatibility, to be removed in future
+ if (options.xaxis.noTicks && options.xaxis.ticks == null)
+ options.xaxis.ticks = options.xaxis.noTicks;
+ if (options.yaxis.noTicks && options.yaxis.ticks == null)
+ options.yaxis.ticks = options.yaxis.noTicks;
+ if (options.x2axis) {
+ options.xaxes[1] = $.extend(true, {}, options.xaxis, options.x2axis);
+ options.xaxes[1].position = "top";
+ }
+ if (options.y2axis) {
+ options.yaxes[1] = $.extend(true, {}, options.yaxis, options.y2axis);
+ options.yaxes[1].position = "right";
+ }
+ if (options.grid.coloredAreas)
+ options.grid.markings = options.grid.coloredAreas;
+ if (options.grid.coloredAreasColor)
+ options.grid.markingsColor = options.grid.coloredAreasColor;
+ if (options.lines)
+ $.extend(true, options.series.lines, options.lines);
+ if (options.points)
+ $.extend(true, options.series.points, options.points);
+ if (options.bars)
+ $.extend(true, options.series.bars, options.bars);
+ if (options.shadowSize != null)
+ options.series.shadowSize = options.shadowSize;
+
+ // save options on axes for future reference
+ for (i = 0; i < options.xaxes.length; ++i)
+ getOrCreateAxis(xaxes, i + 1).options = options.xaxes[i];
+ for (i = 0; i < options.yaxes.length; ++i)
+ getOrCreateAxis(yaxes, i + 1).options = options.yaxes[i];
+
+ // add hooks from options
+ for (var n in hooks)
+ if (options.hooks[n] && options.hooks[n].length)
+ hooks[n] = hooks[n].concat(options.hooks[n]);
+
+ executeHooks(hooks.processOptions, [options]);
+ }
+
+ function setData(d) {
+ series = parseData(d);
+ fillInSeriesOptions();
+ processData();
+ }
+
+ function parseData(d) {
+ var res = [];
+ for (var i = 0; i < d.length; ++i) {
+ var s = $.extend(true, {}, options.series);
+
+ if (d[i].data != null) {
+ s.data = d[i].data; // move the data instead of deep-copy
+ delete d[i].data;
+
+ $.extend(true, s, d[i]);
+
+ d[i].data = s.data;
+ }
+ else
+ s.data = d[i];
+ res.push(s);
+ }
+
+ return res;
+ }
+
+ function axisNumber(obj, coord) {
+ var a = obj[coord + "axis"];
+ if (typeof a == "object") // if we got a real axis, extract number
+ a = a.n;
+ if (typeof a != "number")
+ a = 1; // default to first axis
+ return a;
+ }
+
+ function allAxes() {
+ // return flat array without annoying null entries
+ return $.grep(xaxes.concat(yaxes), function (a) { return a; });
+ }
+
+ function canvasToAxisCoords(pos) {
+ // return an object with x/y corresponding to all used axes
+ var res = {}, i, axis;
+ for (i = 0; i < xaxes.length; ++i) {
+ axis = xaxes[i];
+ if (axis && axis.used)
+ res["x" + axis.n] = axis.c2p(pos.left);
+ }
+
+ for (i = 0; i < yaxes.length; ++i) {
+ axis = yaxes[i];
+ if (axis && axis.used)
+ res["y" + axis.n] = axis.c2p(pos.top);
+ }
+
+ if (res.x1 !== undefined)
+ res.x = res.x1;
+ if (res.y1 !== undefined)
+ res.y = res.y1;
+
+ return res;
+ }
+
+ function axisToCanvasCoords(pos) {
+ // get canvas coords from the first pair of x/y found in pos
+ var res = {}, i, axis, key;
+
+ for (i = 0; i < xaxes.length; ++i) {
+ axis = xaxes[i];
+ if (axis && axis.used) {
+ key = "x" + axis.n;
+ if (pos[key] == null && axis.n == 1)
+ key = "x";
+
+ if (pos[key] != null) {
+ res.left = axis.p2c(pos[key]);
+ break;
+ }
+ }
+ }
+
+ for (i = 0; i < yaxes.length; ++i) {
+ axis = yaxes[i];
+ if (axis && axis.used) {
+ key = "y" + axis.n;
+ if (pos[key] == null && axis.n == 1)
+ key = "y";
+
+ if (pos[key] != null) {
+ res.top = axis.p2c(pos[key]);
+ break;
+ }
+ }
+ }
+
+ return res;
+ }
+
+ function getOrCreateAxis(axes, number) {
+ if (!axes[number - 1])
+ axes[number - 1] = {
+ n: number, // save the number for future reference
+ direction: axes == xaxes ? "x" : "y",
+ options: $.extend(true, {}, axes == xaxes ? options.xaxis : options.yaxis)
+ };
+
+ return axes[number - 1];
+ }
+
+ function fillInSeriesOptions() {
+ var i;
+
+ // collect what we already got of colors
+ var neededColors = series.length,
+ usedColors = [],
+ assignedColors = [];
+ for (i = 0; i < series.length; ++i) {
+ var sc = series[i].color;
+ if (sc != null) {
+ --neededColors;
+ if (typeof sc == "number")
+ assignedColors.push(sc);
+ else
+ usedColors.push($.color.parse(series[i].color));
+ }
+ }
+
+ // we might need to generate more colors if higher indices
+ // are assigned
+ for (i = 0; i < assignedColors.length; ++i) {
+ neededColors = Math.max(neededColors, assignedColors[i] + 1);
+ }
+
+ // produce colors as needed
+ var colors = [], variation = 0;
+ i = 0;
+ while (colors.length < neededColors) {
+ var c;
+ if (options.colors.length == i) // check degenerate case
+ c = $.color.make(100, 100, 100);
+ else
+ c = $.color.parse(options.colors[i]);
+
+ // vary color if needed
+ var sign = variation % 2 == 1 ? -1 : 1;
+ c.scale('rgb', 1 + sign * Math.ceil(variation / 2) * 0.2)
+
+ // FIXME: if we're getting to close to something else,
+ // we should probably skip this one
+ colors.push(c);
+
+ ++i;
+ if (i >= options.colors.length) {
+ i = 0;
+ ++variation;
+ }
+ }
+
+ // fill in the options
+ var colori = 0, s;
+ for (i = 0; i < series.length; ++i) {
+ s = series[i];
+
+ // assign colors
+ if (s.color == null) {
+ s.color = colors[colori].toString();
+ ++colori;
+ }
+ else if (typeof s.color == "number")
+ s.color = colors[s.color].toString();
+
+ // turn on lines automatically in case nothing is set
+ if (s.lines.show == null) {
+ var v, show = true;
+ for (v in s)
+ if (s[v] && s[v].show) {
+ show = false;
+ break;
+ }
+ if (show)
+ s.lines.show = true;
+ }
+
+ // setup axes
+ s.xaxis = getOrCreateAxis(xaxes, axisNumber(s, "x"));
+ s.yaxis = getOrCreateAxis(yaxes, axisNumber(s, "y"));
+ }
+ }
+
+ function processData() {
+ var topSentry = Number.POSITIVE_INFINITY,
+ bottomSentry = Number.NEGATIVE_INFINITY,
+ fakeInfinity = Number.MAX_VALUE,
+ i, j, k, m, length,
+ s, points, ps, x, y, axis, val, f, p;
+
+ function updateAxis(axis, min, max) {
+ if (min < axis.datamin && min != -fakeInfinity)
+ axis.datamin = min;
+ if (max > axis.datamax && max != fakeInfinity)
+ axis.datamax = max;
+ }
+
+ $.each(allAxes(), function (_, axis) {
+ // init axis
+ axis.datamin = topSentry;
+ axis.datamax = bottomSentry;
+ axis.used = false;
+ });
+
+ for (i = 0; i < series.length; ++i) {
+ s = series[i];
+ s.datapoints = { points: [] };
+
+ executeHooks(hooks.processRawData, [ s, s.data, s.datapoints ]);
+ }
+
+ // first pass: clean and copy data
+ for (i = 0; i < series.length; ++i) {
+ s = series[i];
+
+ var data = s.data, format = s.datapoints.format;
+
+ if (!format) {
+ format = [];
+ // find out how to copy
+ format.push({ x: true, number: true, required: true });
+ format.push({ y: true, number: true, required: true });
+
+ if (s.bars.show || (s.lines.show && s.lines.fill)) {
+ format.push({ y: true, number: true, required: false, defaultValue: 0 });
+ if (s.bars.horizontal) {
+ delete format[format.length - 1].y;
+ format[format.length - 1].x = true;
+ }
+ }
+
+ s.datapoints.format = format;
+ }
+
+ if (s.datapoints.pointsize != null)
+ continue; // already filled in
+
+ s.datapoints.pointsize = format.length;
+
+ ps = s.datapoints.pointsize;
+ points = s.datapoints.points;
+
+ insertSteps = s.lines.show && s.lines.steps;
+ s.xaxis.used = s.yaxis.used = true;
+
+ for (j = k = 0; j < data.length; ++j, k += ps) {
+ p = data[j];
+
+ var nullify = p == null;
+ if (!nullify) {
+ for (m = 0; m < ps; ++m) {
+ val = p[m];
+ f = format[m];
+
+ if (f) {
+ if (f.number && val != null) {
+ val = +val; // convert to number
+ if (isNaN(val))
+ val = null;
+ else if (val == Infinity)
+ val = fakeInfinity;
+ else if (val == -Infinity)
+ val = -fakeInfinity;
+ }
+
+ if (val == null) {
+ if (f.required)
+ nullify = true;
+
+ if (f.defaultValue != null)
+ val = f.defaultValue;
+ }
+ }
+
+ points[k + m] = val;
+ }
+ }
+
+ if (nullify) {
+ for (m = 0; m < ps; ++m) {
+ val = points[k + m];
+ if (val != null) {
+ f = format[m];
+ // extract min/max info
+ if (f.x)
+ updateAxis(s.xaxis, val, val);
+ if (f.y)
+ updateAxis(s.yaxis, val, val);
+ }
+ points[k + m] = null;
+ }
+ }
+ else {
+ // a little bit of line specific stuff that
+ // perhaps shouldn't be here, but lacking
+ // better means...
+ if (insertSteps && k > 0
+ && points[k - ps] != null
+ && points[k - ps] != points[k]
+ && points[k - ps + 1] != points[k + 1]) {
+ // copy the point to make room for a middle point
+ for (m = 0; m < ps; ++m)
+ points[k + ps + m] = points[k + m];
+
+ // middle point has same y
+ points[k + 1] = points[k - ps + 1];
+
+ // we've added a point, better reflect that
+ k += ps;
+ }
+ }
+ }
+ }
+
+ // give the hooks a chance to run
+ for (i = 0; i < series.length; ++i) {
+ s = series[i];
+
+ executeHooks(hooks.processDatapoints, [ s, s.datapoints]);
+ }
+
+ // second pass: find datamax/datamin for auto-scaling
+ for (i = 0; i < series.length; ++i) {
+ s = series[i];
+ points = s.datapoints.points,
+ ps = s.datapoints.pointsize;
+
+ var xmin = topSentry, ymin = topSentry,
+ xmax = bottomSentry, ymax = bottomSentry;
+
+ for (j = 0; j < points.length; j += ps) {
+ if (points[j] == null)
+ continue;
+
+ for (m = 0; m < ps; ++m) {
+ val = points[j + m];
+ f = format[m];
+ if (!f || val == fakeInfinity || val == -fakeInfinity)
+ continue;
+
+ if (f.x) {
+ if (val < xmin)
+ xmin = val;
+ if (val > xmax)
+ xmax = val;
+ }
+ if (f.y) {
+ if (val < ymin)
+ ymin = val;
+ if (val > ymax)
+ ymax = val;
+ }
+ }
+ }
+
+ if (s.bars.show) {
+ // make sure we got room for the bar on the dancing floor
+ var delta = s.bars.align == "left" ? 0 : -s.bars.barWidth/2;
+ if (s.bars.horizontal) {
+ ymin += delta;
+ ymax += delta + s.bars.barWidth;
+ }
+ else {
+ xmin += delta;
+ xmax += delta + s.bars.barWidth;
+ }
+ }
+
+ updateAxis(s.xaxis, xmin, xmax);
+ updateAxis(s.yaxis, ymin, ymax);
+ }
+
+ $.each(allAxes(), function (_, axis) {
+ if (axis.datamin == topSentry)
+ axis.datamin = null;
+ if (axis.datamax == bottomSentry)
+ axis.datamax = null;
+ });
+ }
+
+ function makeCanvas(skipPositioning, cls) {
+ var c = document.createElement('canvas');
+ c.className = cls;
+ c.width = canvasWidth;
+ c.height = canvasHeight;
+
+ if (!skipPositioning)
+ $(c).css({ position: 'absolute', left: 0, top: 0 });
+
+ $(c).appendTo(placeholder);
+
+ if (!c.getContext) // excanvas hack
+ c = window.G_vmlCanvasManager.initElement(c);
+
+ // used for resetting in case we get replotted
+ c.getContext("2d").save();
+
+ return c;
+ }
+
+ function getCanvasDimensions() {
+ canvasWidth = placeholder.width();
+ canvasHeight = placeholder.height();
+
+ if (canvasWidth <= 0 || canvasHeight <= 0)
+ throw "Invalid dimensions for plot, width = " + canvasWidth + ", height = " + canvasHeight;
+ }
+
+ function resizeCanvas(c) {
+ // resizing should reset the state (excanvas seems to be
+ // buggy though)
+ if (c.width != canvasWidth)
+ c.width = canvasWidth;
+
+ if (c.height != canvasHeight)
+ c.height = canvasHeight;
+
+ // so try to get back to the initial state (even if it's
+ // gone now, this should be safe according to the spec)
+ var cctx = c.getContext("2d");
+ cctx.restore();
+
+ // and save again
+ cctx.save();
+ }
+
+ function setupCanvases() {
+ var reused,
+ existingCanvas = placeholder.children("canvas.base"),
+ existingOverlay = placeholder.children("canvas.overlay");
+
+ if (existingCanvas.length == 0 || existingOverlay == 0) {
+ // init everything
+
+ placeholder.html(""); // make sure placeholder is clear
+
+ placeholder.css({ padding: 0 }); // padding messes up the positioning
+
+ if (placeholder.css("position") == 'static')
+ placeholder.css("position", "relative"); // for positioning labels and overlay
+
+ getCanvasDimensions();
+
+ canvas = makeCanvas(true, "base");
+ overlay = makeCanvas(false, "overlay"); // overlay canvas for interactive features
+
+ reused = false;
+ }
+ else {
+ // reuse existing elements
+
+ canvas = existingCanvas.get(0);
+ overlay = existingOverlay.get(0);
+
+ reused = true;
+ }
+
+ ctx = canvas.getContext("2d");
+ octx = overlay.getContext("2d");
+
+ // we include the canvas in the event holder too, because IE 7
+ // sometimes has trouble with the stacking order
+ eventHolder = $([overlay, canvas]);
+
+ if (reused) {
+ // run shutdown in the old plot object
+ placeholder.data("plot").shutdown();
+
+ // reset reused canvases
+ plot.resize();
+
+ // make sure overlay pixels are cleared (canvas is cleared when we redraw)
+ octx.clearRect(0, 0, canvasWidth, canvasHeight);
+
+ // then whack any remaining obvious garbage left
+ eventHolder.unbind();
+ placeholder.children().not([canvas, overlay]).remove();
+ }
+
+ // save in case we get replotted
+ placeholder.data("plot", plot);
+ }
+
+ function bindEvents() {
+ // bind events
+ if (options.grid.hoverable) {
+ eventHolder.mousemove(onMouseMove);
+ eventHolder.mouseleave(onMouseLeave);
+ }
+
+ if (options.grid.clickable)
+ eventHolder.click(onClick);
+
+ executeHooks(hooks.bindEvents, [eventHolder]);
+ }
+
+ function shutdown() {
+ if (redrawTimeout)
+ clearTimeout(redrawTimeout);
+
+ eventHolder.unbind("mousemove", onMouseMove);
+ eventHolder.unbind("mouseleave", onMouseLeave);
+ eventHolder.unbind("click", onClick);
+
+ executeHooks(hooks.shutdown, [eventHolder]);
+ }
+
+ function setTransformationHelpers(axis) {
+ // set helper functions on the axis, assumes plot area
+ // has been computed already
+
+ function identity(x) { return x; }
+
+ var s, m, t = axis.options.transform || identity,
+ it = axis.options.inverseTransform;
+
+ // precompute how much the axis is scaling a point
+ // in canvas space
+ if (axis.direction == "x") {
+ s = axis.scale = plotWidth / Math.abs(t(axis.max) - t(axis.min));
+ m = Math.min(t(axis.max), t(axis.min));
+ }
+ else {
+ s = axis.scale = plotHeight / Math.abs(t(axis.max) - t(axis.min));
+ s = -s;
+ m = Math.max(t(axis.max), t(axis.min));
+ }
+
+ // data point to canvas coordinate
+ if (t == identity) // slight optimization
+ axis.p2c = function (p) { return (p - m) * s; };
+ else
+ axis.p2c = function (p) { return (t(p) - m) * s; };
+ // canvas coordinate to data point
+ if (!it)
+ axis.c2p = function (c) { return m + c / s; };
+ else
+ axis.c2p = function (c) { return it(m + c / s); };
+ }
+
+ function measureTickLabels(axis) {
+ var opts = axis.options, i, ticks = axis.ticks || [], labels = [],
+ l, w = opts.labelWidth, h = opts.labelHeight, dummyDiv;
+
+ function makeDummyDiv(labels, width) {
+ return $('<div style="position:absolute;top:-10000px;' + width + 'font-size:smaller">' +
+ '<div class="' + axis.direction + 'Axis ' + axis.direction + axis.n + 'Axis">'
+ + labels.join("") + '</div></div>')
+ .appendTo(placeholder);
+ }
+
+ if (axis.direction == "x") {
+ // to avoid measuring the widths of the labels (it's slow), we
+ // construct fixed-size boxes and put the labels inside
+ // them, we don't need the exact figures and the
+ // fixed-size box content is easy to center
+ if (w == null)
+ w = Math.floor(canvasWidth / (ticks.length > 0 ? ticks.length : 1));
+
+ // measure x label heights
+ if (h == null) {
+ labels = [];
+ for (i = 0; i < ticks.length; ++i) {
+ l = ticks[i].label;
+ if (l)
+ labels.push('<div class="tickLabel" style="float:left;width:' + w + 'px">' + l + '</div>');
+ }
+
+ if (labels.length > 0) {
+ // stick them all in the same div and measure
+ // collective height
+ labels.push('<div style="clear:left"></div>');
+ dummyDiv = makeDummyDiv(labels, "width:10000px;");
+ h = dummyDiv.height();
+ dummyDiv.remove();
+ }
+ }
+ }
+ else if (w == null || h == null) {
+ // calculate y label dimensions
+ for (i = 0; i < ticks.length; ++i) {
+ l = ticks[i].label;
+ if (l)
+ labels.push('<div class="tickLabel">' + l + '</div>');
+ }
+
+ if (labels.length > 0) {
+ dummyDiv = makeDummyDiv(labels, "");
+ if (w == null)
+ w = dummyDiv.children().width();
+ if (h == null)
+ h = dummyDiv.find("div.tickLabel").height();
+ dummyDiv.remove();
+ }
+ }
+
+ if (w == null)
+ w = 0;
+ if (h == null)
+ h = 0;
+
+ axis.labelWidth = w;
+ axis.labelHeight = h;
+ }
+
+ function allocateAxisBoxFirstPhase(axis) {
+ // find the bounding box of the axis by looking at label
+ // widths/heights and ticks, make room by diminishing the
+ // plotOffset
+
+ var lw = axis.labelWidth,
+ lh = axis.labelHeight,
+ pos = axis.options.position,
+ tickLength = axis.options.tickLength,
+ axismargin = options.grid.axisMargin,
+ padding = options.grid.labelMargin,
+ all = axis.direction == "x" ? xaxes : yaxes,
+ index;
+
+ // determine axis margin
+ var samePosition = $.grep(all, function (a) {
+ return a && a.options.position == pos && a.reserveSpace;
+ });
+ if ($.inArray(axis, samePosition) == samePosition.length - 1)
+ axismargin = 0; // outermost
+
+ // determine tick length - if we're innermost, we can use "full"
+ if (tickLength == null)
+ tickLength = "full";
+
+ var sameDirection = $.grep(all, function (a) {
+ return a && a.reserveSpace;
+ });
+
+ var innermost = $.inArray(axis, sameDirection) == 0;
+ if (!innermost && tickLength == "full")
+ tickLength = 5;
+
+ if (!isNaN(+tickLength))
+ padding += +tickLength;
+
+ // compute box
+ if (axis.direction == "x") {
+ lh += padding;
+
+ if (pos == "bottom") {
+ plotOffset.bottom += lh + axismargin;
+ axis.box = { top: canvasHeight - plotOffset.bottom, height: lh };
+ }
+ else {
+ axis.box = { top: plotOffset.top + axismargin, height: lh };
+ plotOffset.top += lh + axismargin;
+ }
+ }
+ else {
+ lw += padding;
+
+ if (pos == "left") {
+ axis.box = { left: plotOffset.left + axismargin, width: lw };
+ plotOffset.left += lw + axismargin;
+ }
+ else {
+ plotOffset.right += lw + axismargin;
+ axis.box = { left: canvasWidth - plotOffset.right, width: lw };
+ }
+ }
+
+ // save for future reference
+ axis.position = pos;
+ axis.tickLength = tickLength;
+ axis.box.padding = padding;
+ axis.innermost = innermost;
+ }
+
+ function allocateAxisBoxSecondPhase(axis) {
+ // set remaining bounding box coordinates
+ if (axis.direction == "x") {
+ axis.box.left = plotOffset.left;
+ axis.box.width = plotWidth;
+ }
+ else {
+ axis.box.top = plotOffset.top;
+ axis.box.height = plotHeight;
+ }
+ }
+
+ function setupGrid() {
+ var i, axes = allAxes();
+
+ // first calculate the plot and axis box dimensions
+
+ $.each(axes, function (_, axis) {
+ axis.show = axis.options.show;
+ if (axis.show == null)
+ axis.show = axis.used; // by default an axis is visible if it's got data
+
+ axis.reserveSpace = axis.show || axis.options.reserveSpace;
+
+ setRange(axis);
+ });
+
+ allocatedAxes = $.grep(axes, function (axis) { return axis.reserveSpace; });
+
+ plotOffset.left = plotOffset.right = plotOffset.top = plotOffset.bottom = 0;
+ if (options.grid.show) {
+ $.each(allocatedAxes, function (_, axis) {
+ // make the ticks
+ setupTickGeneration(axis);
+ setTicks(axis);
+ snapRangeToTicks(axis, axis.ticks);
+
+ // find labelWidth/Height for axis
+ measureTickLabels(axis);
+ });
+
+ // with all dimensions in house, we can compute the
+ // axis boxes, start from the outside (reverse order)
+ for (i = allocatedAxes.length - 1; i >= 0; --i)
+ allocateAxisBoxFirstPhase(allocatedAxes[i]);
+
+ // make sure we've got enough space for things that
+ // might stick out
+ var minMargin = options.grid.minBorderMargin;
+ if (minMargin == null) {
+ minMargin = 0;
+ for (i = 0; i < series.length; ++i)
+ minMargin = Math.max(minMargin, series[i].points.radius + series[i].points.lineWidth/2);
+ }
+
+ for (var a in plotOffset) {
+ plotOffset[a] += options.grid.borderWidth;
+ plotOffset[a] = Math.max(minMargin, plotOffset[a]);
+ }
+ }
+
+ plotWidth = canvasWidth - plotOffset.left - plotOffset.right;
+ plotHeight = canvasHeight - plotOffset.bottom - plotOffset.top;
+
+ // now we got the proper plotWidth/Height, we can compute the scaling
+ $.each(axes, function (_, axis) {
+ setTransformationHelpers(axis);
+ });
+
+ if (options.grid.show) {
+ $.each(allocatedAxes, function (_, axis) {
+ allocateAxisBoxSecondPhase(axis);
+ });
+
+ insertAxisLabels();
+ }
+
+ insertLegend();
+ }
+
+ function setRange(axis) {
+ var opts = axis.options,
+ min = +(opts.min != null ? opts.min : axis.datamin),
+ max = +(opts.max != null ? opts.max : axis.datamax),
+ delta = max - min;
+
+ if (delta == 0.0) {
+ // degenerate case
+ var widen = max == 0 ? 1 : 0.01;
+
+ if (opts.min == null)
+ min -= widen;
+ // always widen max if we couldn't widen min to ensure we
+ // don't fall into min == max which doesn't work
+ if (opts.max == null || opts.min != null)
+ max += widen;
+ }
+ else {
+ // consider autoscaling
+ var margin = opts.autoscaleMargin;
+ if (margin != null) {
+ if (opts.min == null) {
+ min -= delta * margin;
+ // make sure we don't go below zero if all values
+ // are positive
+ if (min < 0 && axis.datamin != null && axis.datamin >= 0)
+ min = 0;
+ }
+ if (opts.max == null) {
+ max += delta * margin;
+ if (max > 0 && axis.datamax != null && axis.datamax <= 0)
+ max = 0;
+ }
+ }
+ }
+ axis.min = min;
+ axis.max = max;
+ }
+
+ function setupTickGeneration(axis) {
+ var opts = axis.options;
+
+ // estimate number of ticks
+ var noTicks;
+ if (typeof opts.ticks == "number" && opts.ticks > 0)
+ noTicks = opts.ticks;
+ else
+ // heuristic based on the model a*sqrt(x) fitted to
+ // some data points that seemed reasonable
+ noTicks = 0.3 * Math.sqrt(axis.direction == "x" ? canvasWidth : canvasHeight);
+
+ var delta = (axis.max - axis.min) / noTicks,
+ size, generator, unit, formatter, i, magn, norm;
+
+ if (opts.mode == "time") {
+ // pretty handling of time
+
+ // map of app. size of time units in milliseconds
+ var timeUnitSize = {
+ "second": 1000,
+ "minute": 60 * 1000,
+ "hour": 60 * 60 * 1000,
+ "day": 24 * 60 * 60 * 1000,
+ "month": 30 * 24 * 60 * 60 * 1000,
+ "year": 365.2425 * 24 * 60 * 60 * 1000
+ };
+
+
+ // the allowed tick sizes, after 1 year we use
+ // an integer algorithm
+ var spec = [
+ [1, "second"], [2, "second"], [5, "second"], [10, "second"],
+ [30, "second"],
+ [1, "minute"], [2, "minute"], [5, "minute"], [10, "minute"],
+ [30, "minute"],
+ [1, "hour"], [2, "hour"], [4, "hour"],
+ [8, "hour"], [12, "hour"],
+ [1, "day"], [2, "day"], [3, "day"],
+ [0.25, "month"], [0.5, "month"], [1, "month"],
+ [2, "month"], [3, "month"], [6, "month"],
+ [1, "year"]
+ ];
+
+ var minSize = 0;
+ if (opts.minTickSize != null) {
+ if (typeof opts.tickSize == "number")
+ minSize = opts.tickSize;
+ else
+ minSize = opts.minTickSize[0] * timeUnitSize[opts.minTickSize[1]];
+ }
+
+ for (var i = 0; i < spec.length - 1; ++i)
+ if (delta < (spec[i][0] * timeUnitSize[spec[i][1]]
+ + spec[i + 1][0] * timeUnitSize[spec[i + 1][1]]) / 2
+ && spec[i][0] * timeUnitSize[spec[i][1]] >= minSize)
+ break;
+ size = spec[i][0];
+ unit = spec[i][1];
+
+ // special-case the possibility of several years
+ if (unit == "year") {
+ magn = Math.pow(10, Math.floor(Math.log(delta / timeUnitSize.year) / Math.LN10));
+ norm = (delta / timeUnitSize.year) / magn;
+ if (norm < 1.5)
+ size = 1;
+ else if (norm < 3)
+ size = 2;
+ else if (norm < 7.5)
+ size = 5;
+ else
+ size = 10;
+
+ size *= magn;
+ }
+
+ axis.tickSize = opts.tickSize || [size, unit];
+
+ generator = function(axis) {
+ var ticks = [],
+ tickSize = axis.tickSize[0], unit = axis.tickSize[1],
+ d = new Date(axis.min);
+
+ var step = tickSize * timeUnitSize[unit];
+
+ if (unit == "second")
+ d.setUTCSeconds(floorInBase(d.getUTCSeconds(), tickSize));
+ if (unit == "minute")
+ d.setUTCMinutes(floorInBase(d.getUTCMinutes(), tickSize));
+ if (unit == "hour")
+ d.setUTCHours(floorInBase(d.getUTCHours(), tickSize));
+ if (unit == "month")
+ d.setUTCMonth(floorInBase(d.getUTCMonth(), tickSize));
+ if (unit == "year")
+ d.setUTCFullYear(floorInBase(d.getUTCFullYear(), tickSize));
+
+ // reset smaller components
+ d.setUTCMilliseconds(0);
+ if (step >= timeUnitSize.minute)
+ d.setUTCSeconds(0);
+ if (step >= timeUnitSize.hour)
+ d.setUTCMinutes(0);
+ if (step >= timeUnitSize.day)
+ d.setUTCHours(0);
+ if (step >= timeUnitSize.day * 4)
+ d.setUTCDate(1);
+ if (step >= timeUnitSize.year)
+ d.setUTCMonth(0);
+
+
+ var carry = 0, v = Number.NaN, prev;
+ do {
+ prev = v;
+ v = d.getTime();
+ ticks.push(v);
+ if (unit == "month") {
+ if (tickSize < 1) {
+ // a bit complicated - we'll divide the month
+ // up but we need to take care of fractions
+ // so we don't end up in the middle of a day
+ d.setUTCDate(1);
+ var start = d.getTime();
+ d.setUTCMonth(d.getUTCMonth() + 1);
+ var end = d.getTime();
+ d.setTime(v + carry * timeUnitSize.hour + (end - start) * tickSize);
+ carry = d.getUTCHours();
+ d.setUTCHours(0);
+ }
+ else
+ d.setUTCMonth(d.getUTCMonth() + tickSize);
+ }
+ else if (unit == "year") {
+ d.setUTCFullYear(d.getUTCFullYear() + tickSize);
+ }
+ else
+ d.setTime(v + step);
+ } while (v < axis.max && v != prev);
+
+ return ticks;
+ };
+
+ formatter = function (v, axis) {
+ var d = new Date(v);
+
+ // first check global format
+ if (opts.timeformat != null)
+ return $.plot.formatDate(d, opts.timeformat, opts.monthNames);
+
+ var t = axis.tickSize[0] * timeUnitSize[axis.tickSize[1]];
+ var span = axis.max - axis.min;
+ var suffix = (opts.twelveHourClock) ? " %p" : "";
+
+ if (t < timeUnitSize.minute)
+ fmt = "%h:%M:%S" + suffix;
+ else if (t < timeUnitSize.day) {
+ if (span < 2 * timeUnitSize.day)
+ fmt = "%h:%M" + suffix;
+ else
+ fmt = "%b %d %h:%M" + suffix;
+ }
+ else if (t < timeUnitSize.month)
+ fmt = "%b %d";
+ else if (t < timeUnitSize.year) {
+ if (span < timeUnitSize.year)
+ fmt = "%b";
+ else
+ fmt = "%b %y";
+ }
+ else
+ fmt = "%y";
+
+ return $.plot.formatDate(d, fmt, opts.monthNames);
+ };
+ }
+ else {
+ // pretty rounding of base-10 numbers
+ var maxDec = opts.tickDecimals;
+ var dec = -Math.floor(Math.log(delta) / Math.LN10);
+ if (maxDec != null && dec > maxDec)
+ dec = maxDec;
+
+ magn = Math.pow(10, -dec);
+ norm = delta / magn; // norm is between 1.0 and 10.0
+
+ if (norm < 1.5)
+ size = 1;
+ else if (norm < 3) {
+ size = 2;
+ // special case for 2.5, requires an extra decimal
+ if (norm > 2.25 && (maxDec == null || dec + 1 <= maxDec)) {
+ size = 2.5;
+ ++dec;
+ }
+ }
+ else if (norm < 7.5)
+ size = 5;
+ else
+ size = 10;
+
+ size *= magn;
+
+ if (opts.minTickSize != null && size < opts.minTickSize)
+ size = opts.minTickSize;
+
+ axis.tickDecimals = Math.max(0, maxDec != null ? maxDec : dec);
+ axis.tickSize = opts.tickSize || size;
+
+ generator = function (axis) {
+ var ticks = [];
+
+ // spew out all possible ticks
+ var start = floorInBase(axis.min, axis.tickSize),
+ i = 0, v = Number.NaN, prev;
+ do {
+ prev = v;
+ v = start + i * axis.tickSize;
+ ticks.push(v);
+ ++i;
+ } while (v < axis.max && v != prev);
+ return ticks;
+ };
+
+ formatter = function (v, axis) {
+ return v.toFixed(axis.tickDecimals);
+ };
+ }
+
+ if (opts.alignTicksWithAxis != null) {
+ var otherAxis = (axis.direction == "x" ? xaxes : yaxes)[opts.alignTicksWithAxis - 1];
+ if (otherAxis && otherAxis.used && otherAxis != axis) {
+ // consider snapping min/max to outermost nice ticks
+ var niceTicks = generator(axis);
+ if (niceTicks.length > 0) {
+ if (opts.min == null)
+ axis.min = Math.min(axis.min, niceTicks[0]);
+ if (opts.max == null && niceTicks.length > 1)
+ axis.max = Math.max(axis.max, niceTicks[niceTicks.length - 1]);
+ }
+
+ generator = function (axis) {
+ // copy ticks, scaled to this axis
+ var ticks = [], v, i;
+ for (i = 0; i < otherAxis.ticks.length; ++i) {
+ v = (otherAxis.ticks[i].v - otherAxis.min) / (otherAxis.max - otherAxis.min);
+ v = axis.min + v * (axis.max - axis.min);
+ ticks.push(v);
+ }
+ return ticks;
+ };
+
+ // we might need an extra decimal since forced
+ // ticks don't necessarily fit naturally
+ if (axis.mode != "time" && opts.tickDecimals == null) {
+ var extraDec = Math.max(0, -Math.floor(Math.log(delta) / Math.LN10) + 1),
+ ts = generator(axis);
+
+ // only proceed if the tick interval rounded
+ // with an extra decimal doesn't give us a
+ // zero at end
+ if (!(ts.length > 1 && /\..*0$/.test((ts[1] - ts[0]).toFixed(extraDec))))
+ axis.tickDecimals = extraDec;
+ }
+ }
+ }
+
+ axis.tickGenerator = generator;
+ if ($.isFunction(opts.tickFormatter))
+ axis.tickFormatter = function (v, axis) { return "" + opts.tickFormatter(v, axis); };
+ else
+ axis.tickFormatter = formatter;
+ }
+
+ function setTicks(axis) {
+ var oticks = axis.options.ticks, ticks = [];
+ if (oticks == null || (typeof oticks == "number" && oticks > 0))
+ ticks = axis.tickGenerator(axis);
+ else if (oticks) {
+ if ($.isFunction(oticks))
+ // generate the ticks
+ ticks = oticks({ min: axis.min, max: axis.max });
+ else
+ ticks = oticks;
+ }
+
+ // clean up/labelify the supplied ticks, copy them over
+ var i, v;
+ axis.ticks = [];
+ for (i = 0; i < ticks.length; ++i) {
+ var label = null;
+ var t = ticks[i];
+ if (typeof t == "object") {
+ v = +t[0];
+ if (t.length > 1)
+ label = t[1];
+ }
+ else
+ v = +t;
+ if (label == null)
+ label = axis.tickFormatter(v, axis);
+ if (!isNaN(v))
+ axis.ticks.push({ v: v, label: label });
+ }
+ }
+
+ function snapRangeToTicks(axis, ticks) {
+ if (axis.options.autoscaleMargin && ticks.length > 0) {
+ // snap to ticks
+ if (axis.options.min == null)
+ axis.min = Math.min(axis.min, ticks[0].v);
+ if (axis.options.max == null && ticks.length > 1)
+ axis.max = Math.max(axis.max, ticks[ticks.length - 1].v);
+ }
+ }
+
+ function draw() {
+ ctx.clearRect(0, 0, canvasWidth, canvasHeight);
+
+ var grid = options.grid;
+
+ // draw background, if any
+ if (grid.show && grid.backgroundColor)
+ drawBackground();
+
+ if (grid.show && !grid.aboveData)
+ drawGrid();
+
+ for (var i = 0; i < series.length; ++i) {
+ executeHooks(hooks.drawSeries, [ctx, series[i]]);
+ drawSeries(series[i]);
+ }
+
+ executeHooks(hooks.draw, [ctx]);
+
+ if (grid.show && grid.aboveData)
+ drawGrid();
+ }
+
+ function extractRange(ranges, coord) {
+ var axis, from, to, key, axes = allAxes();
+
+ for (i = 0; i < axes.length; ++i) {
+ axis = axes[i];
+ if (axis.direction == coord) {
+ key = coord + axis.n + "axis";
+ if (!ranges[key] && axis.n == 1)
+ key = coord + "axis"; // support x1axis as xaxis
+ if (ranges[key]) {
+ from = ranges[key].from;
+ to = ranges[key].to;
+ break;
+ }
+ }
+ }
+
+ // backwards-compat stuff - to be removed in future
+ if (!ranges[key]) {
+ axis = coord == "x" ? xaxes[0] : yaxes[0];
+ from = ranges[coord + "1"];
+ to = ranges[coord + "2"];
+ }
+
+ // auto-reverse as an added bonus
+ if (from != null && to != null && from > to) {
+ var tmp = from;
+ from = to;
+ to = tmp;
+ }
+
+ return { from: from, to: to, axis: axis };
+ }
+
+ function drawBackground() {
+ ctx.save();
+ ctx.translate(plotOffset.left, plotOffset.top);
+
+ ctx.fillStyle = getColorOrGradient(options.grid.backgroundColor, plotHeight, 0, "rgba(255, 255, 255, 0)");
+ ctx.fillRect(0, 0, plotWidth, plotHeight);
+ ctx.restore();
+ }
+
+ function drawGrid() {
+ var i;
+
+ ctx.save();
+ ctx.translate(plotOffset.left, plotOffset.top);
+
+ // draw markings
+ var markings = options.grid.markings;
+ if (markings) {
+ if ($.isFunction(markings)) {
+ var axes = plot.getAxes();
+ // xmin etc. is backwards compatibility, to be
+ // removed in the future
+ axes.xmin = axes.xaxis.min;
+ axes.xmax = axes.xaxis.max;
+ axes.ymin = axes.yaxis.min;
+ axes.ymax = axes.yaxis.max;
+
+ markings = markings(axes);
+ }
+
+ for (i = 0; i < markings.length; ++i) {
+ var m = markings[i],
+ xrange = extractRange(m, "x"),
+ yrange = extractRange(m, "y");
+
+ // fill in missing
+ if (xrange.from == null)
+ xrange.from = xrange.axis.min;
+ if (xrange.to == null)
+ xrange.to = xrange.axis.max;
+ if (yrange.from == null)
+ yrange.from = yrange.axis.min;
+ if (yrange.to == null)
+ yrange.to = yrange.axis.max;
+
+ // clip
+ if (xrange.to < xrange.axis.min || xrange.from > xrange.axis.max ||
+ yrange.to < yrange.axis.min || yrange.from > yrange.axis.max)
+ continue;
+
+ xrange.from = Math.max(xrange.from, xrange.axis.min);
+ xrange.to = Math.min(xrange.to, xrange.axis.max);
+ yrange.from = Math.max(yrange.from, yrange.axis.min);
+ yrange.to = Math.min(yrange.to, yrange.axis.max);
+
+ if (xrange.from == xrange.to && yrange.from == yrange.to)
+ continue;
+
+ // then draw
+ xrange.from = xrange.axis.p2c(xrange.from);
+ xrange.to = xrange.axis.p2c(xrange.to);
+ yrange.from = yrange.axis.p2c(yrange.from);
+ yrange.to = yrange.axis.p2c(yrange.to);
+
+ if (xrange.from == xrange.to || yrange.from == yrange.to) {
+ // draw line
+ ctx.beginPath();
+ ctx.strokeStyle = m.color || options.grid.markingsColor;
+ ctx.lineWidth = m.lineWidth || options.grid.markingsLineWidth;
+ ctx.moveTo(xrange.from, yrange.from);
+ ctx.lineTo(xrange.to, yrange.to);
+ ctx.stroke();
+ }
+ else {
+ // fill area
+ ctx.fillStyle = m.color || options.grid.markingsColor;
+ ctx.fillRect(xrange.from, yrange.to,
+ xrange.to - xrange.from,
+ yrange.from - yrange.to);
+ }
+ }
+ }
+
+ // draw the ticks
+ var axes = allAxes(), bw = options.grid.borderWidth;
+
+ for (var j = 0; j < axes.length; ++j) {
+ var axis = axes[j], box = axis.box,
+ t = axis.tickLength, x, y, xoff, yoff;
+ if (!axis.show || axis.ticks.length == 0)
+ continue
+
+ ctx.strokeStyle = axis.options.tickColor || $.color.parse(axis.options.color).scale('a', 0.22).toString();
+ ctx.lineWidth = 1;
+
+ // find the edges
+ if (axis.direction == "x") {
+ x = 0;
+ if (t == "full")
+ y = (axis.position == "top" ? 0 : plotHeight);
+ else
+ y = box.top - plotOffset.top + (axis.position == "top" ? box.height : 0);
+ }
+ else {
+ y = 0;
+ if (t == "full")
+ x = (axis.position == "left" ? 0 : plotWidth);
+ else
+ x = box.left - plotOffset.left + (axis.position == "left" ? box.width : 0);
+ }
+
+ // draw tick bar
+ if (!axis.innermost) {
+ ctx.beginPath();
+ xoff = yoff = 0;
+ if (axis.direction == "x")
+ xoff = plotWidth;
+ else
+ yoff = plotHeight;
+
+ if (ctx.lineWidth == 1) {
+ x = Math.floor(x) + 0.5;
+ y = Math.floor(y) + 0.5;
+ }
+
+ ctx.moveTo(x, y);
+ ctx.lineTo(x + xoff, y + yoff);
+ ctx.stroke();
+ }
+
+ // draw ticks
+ ctx.beginPath();
+ for (i = 0; i < axis.ticks.length; ++i) {
+ var v = axis.ticks[i].v;
+
+ xoff = yoff = 0;
+
+ if (v < axis.min || v > axis.max
+ // skip those lying on the axes if we got a border
+ || (t == "full" && bw > 0
+ && (v == axis.min || v == axis.max)))
+ continue;
+
+ if (axis.direction == "x") {
+ x = axis.p2c(v);
+ yoff = t == "full" ? -plotHeight : t;
+
+ if (axis.position == "top")
+ yoff = -yoff;
+ }
+ else {
+ y = axis.p2c(v);
+ xoff = t == "full" ? -plotWidth : t;
+
+ if (axis.position == "left")
+ xoff = -xoff;
+ }
+
+ if (ctx.lineWidth == 1) {
+ if (axis.direction == "x")
+ x = Math.floor(x) + 0.5;
+ else
+ y = Math.floor(y) + 0.5;
+ }
+
+ ctx.moveTo(x, y);
+ ctx.lineTo(x + xoff, y + yoff);
+ }
+
+ ctx.stroke();
+ }
+
+
+ // draw border
+ if (bw) {
+ ctx.lineWidth = bw;
+ ctx.strokeStyle = options.grid.borderColor;
+ ctx.strokeRect(-bw/2, -bw/2, plotWidth + bw, plotHeight + bw);
+ }
+
+ ctx.restore();
+ }
+
+ function insertAxisLabels() {
+ placeholder.find(".tickLabels").remove();
+
+ var html = ['<div class="tickLabels" style="font-size:smaller">'];
+
+ var axes = allAxes();
+ for (var j = 0; j < axes.length; ++j) {
+ var axis = axes[j], box = axis.box;
+ if (!axis.show)
+ continue;
+ //debug: html.push('<div style="position:absolute;opacity:0.10;background-color:red;left:' + box.left + 'px;top:' + box.top + 'px;width:' + box.width + 'px;height:' + box.height + 'px"></div>')
+ html.push('<div class="' + axis.direction + 'Axis ' + axis.direction + axis.n + 'Axis" style="color:' + axis.options.color + '">');
+ for (var i = 0; i < axis.ticks.length; ++i) {
+ var tick = axis.ticks[i];
+ if (!tick.label || tick.v < axis.min || tick.v > axis.max)
+ continue;
+
+ var pos = {}, align;
+
+ if (axis.direction == "x") {
+ align = "center";
+ pos.left = Math.round(plotOffset.left + axis.p2c(tick.v) - axis.labelWidth/2);
+ if (axis.position == "bottom")
+ pos.top = box.top + box.padding;
+ else
+ pos.bottom = canvasHeight - (box.top + box.height - box.padding);
+ }
+ else {
+ pos.top = Math.round(plotOffset.top + axis.p2c(tick.v) - axis.labelHeight/2);
+ if (axis.position == "left") {
+ pos.right = canvasWidth - (box.left + box.width - box.padding)
+ align = "right";
+ }
+ else {
+ pos.left = box.left + box.padding;
+ align = "left";
+ }
+ }
+
+ pos.width = axis.labelWidth;
+
+ var style = ["position:absolute", "text-align:" + align ];
+ for (var a in pos)
+ style.push(a + ":" + pos[a] + "px")
+
+ html.push('<div class="tickLabel" style="' + style.join(';') + '">' + tick.label + '</div>');
+ }
+ html.push('</div>');
+ }
+
+ html.push('</div>');
+
+ placeholder.append(html.join(""));
+ }
+
+ function drawSeries(series) {
+ if (series.lines.show)
+ drawSeriesLines(series);
+ if (series.bars.show)
+ drawSeriesBars(series);
+ if (series.points.show)
+ drawSeriesPoints(series);
+ }
+
+ function drawSeriesLines(series) {
+ function plotLine(datapoints, xoffset, yoffset, axisx, axisy) {
+ var points = datapoints.points,
+ ps = datapoints.pointsize,
+ prevx = null, prevy = null;
+
+ ctx.beginPath();
+ for (var i = ps; i < points.length; i += ps) {
+ var x1 = points[i - ps], y1 = points[i - ps + 1],
+ x2 = points[i], y2 = points[i + 1];
+
+ if (x1 == null || x2 == null)
+ continue;
+
+ // clip with ymin
+ if (y1 <= y2 && y1 < axisy.min) {
+ if (y2 < axisy.min)
+ continue; // line segment is outside
+ // compute new intersection point
+ x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
+ y1 = axisy.min;
+ }
+ else if (y2 <= y1 && y2 < axisy.min) {
+ if (y1 < axisy.min)
+ continue;
+ x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
+ y2 = axisy.min;
+ }
+
+ // clip with ymax
+ if (y1 >= y2 && y1 > axisy.max) {
+ if (y2 > axisy.max)
+ continue;
+ x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
+ y1 = axisy.max;
+ }
+ else if (y2 >= y1 && y2 > axisy.max) {
+ if (y1 > axisy.max)
+ continue;
+ x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
+ y2 = axisy.max;
+ }
+
+ // clip with xmin
+ if (x1 <= x2 && x1 < axisx.min) {
+ if (x2 < axisx.min)
+ continue;
+ y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
+ x1 = axisx.min;
+ }
+ else if (x2 <= x1 && x2 < axisx.min) {
+ if (x1 < axisx.min)
+ continue;
+ y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
+ x2 = axisx.min;
+ }
+
+ // clip with xmax
+ if (x1 >= x2 && x1 > axisx.max) {
+ if (x2 > axisx.max)
+ continue;
+ y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
+ x1 = axisx.max;
+ }
+ else if (x2 >= x1 && x2 > axisx.max) {
+ if (x1 > axisx.max)
+ continue;
+ y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
+ x2 = axisx.max;
+ }
+
+ if (x1 != prevx || y1 != prevy)
+ ctx.moveTo(axisx.p2c(x1) + xoffset, axisy.p2c(y1) + yoffset);
+
+ prevx = x2;
+ prevy = y2;
+ ctx.lineTo(axisx.p2c(x2) + xoffset, axisy.p2c(y2) + yoffset);
+ }
+ ctx.stroke();
+ }
+
+ function plotLineArea(datapoints, axisx, axisy) {
+ var points = datapoints.points,
+ ps = datapoints.pointsize,
+ bottom = Math.min(Math.max(0, axisy.min), axisy.max),
+ i = 0, top, areaOpen = false,
+ ypos = 1, segmentStart = 0, segmentEnd = 0;
+
+ // we process each segment in two turns, first forward
+ // direction to sketch out top, then once we hit the
+ // end we go backwards to sketch the bottom
+ while (true) {
+ if (ps > 0 && i > points.length + ps)
+ break;
+
+ i += ps; // ps is negative if going backwards
+
+ var x1 = points[i - ps],
+ y1 = points[i - ps + ypos],
+ x2 = points[i], y2 = points[i + ypos];
+
+ if (areaOpen) {
+ if (ps > 0 && x1 != null && x2 == null) {
+ // at turning point
+ segmentEnd = i;
+ ps = -ps;
+ ypos = 2;
+ continue;
+ }
+
+ if (ps < 0 && i == segmentStart + ps) {
+ // done with the reverse sweep
+ ctx.fill();
+ areaOpen = false;
+ ps = -ps;
+ ypos = 1;
+ i = segmentStart = segmentEnd + ps;
+ continue;
+ }
+ }
+
+ if (x1 == null || x2 == null)
+ continue;
+
+ // clip x values
+
+ // clip with xmin
+ if (x1 <= x2 && x1 < axisx.min) {
+ if (x2 < axisx.min)
+ continue;
+ y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
+ x1 = axisx.min;
+ }
+ else if (x2 <= x1 && x2 < axisx.min) {
+ if (x1 < axisx.min)
+ continue;
+ y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
+ x2 = axisx.min;
+ }
+
+ // clip with xmax
+ if (x1 >= x2 && x1 > axisx.max) {
+ if (x2 > axisx.max)
+ continue;
+ y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
+ x1 = axisx.max;
+ }
+ else if (x2 >= x1 && x2 > axisx.max) {
+ if (x1 > axisx.max)
+ continue;
+ y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
+ x2 = axisx.max;
+ }
+
+ if (!areaOpen) {
+ // open area
+ ctx.beginPath();
+ ctx.moveTo(axisx.p2c(x1), axisy.p2c(bottom));
+ areaOpen = true;
+ }
+
+ // now first check the case where both is outside
+ if (y1 >= axisy.max && y2 >= axisy.max) {
+ ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.max));
+ ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.max));
+ continue;
+ }
+ else if (y1 <= axisy.min && y2 <= axisy.min) {
+ ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.min));
+ ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.min));
+ continue;
+ }
+
+ // else it's a bit more complicated, there might
+ // be a flat maxed out rectangle first, then a
+ // triangular cutout or reverse; to find these
+ // keep track of the current x values
+ var x1old = x1, x2old = x2;
+
+ // clip the y values, without shortcutting, we
+ // go through all cases in turn
+
+ // clip with ymin
+ if (y1 <= y2 && y1 < axisy.min && y2 >= axisy.min) {
+ x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
+ y1 = axisy.min;
+ }
+ else if (y2 <= y1 && y2 < axisy.min && y1 >= axisy.min) {
+ x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
+ y2 = axisy.min;
+ }
+
+ // clip with ymax
+ if (y1 >= y2 && y1 > axisy.max && y2 <= axisy.max) {
+ x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
+ y1 = axisy.max;
+ }
+ else if (y2 >= y1 && y2 > axisy.max && y1 <= axisy.max) {
+ x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
+ y2 = axisy.max;
+ }
+
+ // if the x value was changed we got a rectangle
+ // to fill
+ if (x1 != x1old) {
+ ctx.lineTo(axisx.p2c(x1old), axisy.p2c(y1));
+ // it goes to (x1, y1), but we fill that below
+ }
+
+ // fill triangular section, this sometimes result
+ // in redundant points if (x1, y1) hasn't changed
+ // from previous line to, but we just ignore that
+ ctx.lineTo(axisx.p2c(x1), axisy.p2c(y1));
+ ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));
+
+ // fill the other rectangle if it's there
+ if (x2 != x2old) {
+ ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));
+ ctx.lineTo(axisx.p2c(x2old), axisy.p2c(y2));
+ }
+ }
+ }
+
+ ctx.save();
+ ctx.translate(plotOffset.left, plotOffset.top);
+ ctx.lineJoin = "round";
+
+ var lw = series.lines.lineWidth,
+ sw = series.shadowSize;
+ // FIXME: consider another form of shadow when filling is turned on
+ if (lw > 0 && sw > 0) {
+ // draw shadow as a thick and thin line with transparency
+ ctx.lineWidth = sw;
+ ctx.strokeStyle = "rgba(0,0,0,0.1)";
+ // position shadow at angle from the mid of line
+ var angle = Math.PI/18;
+ plotLine(series.datapoints, Math.sin(angle) * (lw/2 + sw/2), Math.cos(angle) * (lw/2 + sw/2), series.xaxis, series.yaxis);
+ ctx.lineWidth = sw/2;
+ plotLine(series.datapoints, Math.sin(angle) * (lw/2 + sw/4), Math.cos(angle) * (lw/2 + sw/4), series.xaxis, series.yaxis);
+ }
+
+ ctx.lineWidth = lw;
+ ctx.strokeStyle = series.color;
+ var fillStyle = getFillStyle(series.lines, series.color, 0, plotHeight);
+ if (fillStyle) {
+ ctx.fillStyle = fillStyle;
+ plotLineArea(series.datapoints, series.xaxis, series.yaxis);
+ }
+
+ if (lw > 0)
+ plotLine(series.datapoints, 0, 0, series.xaxis, series.yaxis);
+ ctx.restore();
+ }
+
+ function drawSeriesPoints(series) {
+ function plotPoints(datapoints, radius, fillStyle, offset, shadow, axisx, axisy, symbol) {
+ var points = datapoints.points, ps = datapoints.pointsize;
+
+ for (var i = 0; i < points.length; i += ps) {
+ var x = points[i], y = points[i + 1];
+ if (x == null || x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max)
+ continue;
+
+ ctx.beginPath();
+ x = axisx.p2c(x);
+ y = axisy.p2c(y) + offset;
+ if (symbol == "circle")
+ ctx.arc(x, y, radius, 0, shadow ? Math.PI : Math.PI * 2, false);
+ else
+ symbol(ctx, x, y, radius, shadow);
+ ctx.closePath();
+
+ if (fillStyle) {
+ ctx.fillStyle = fillStyle;
+ ctx.fill();
+ }
+ ctx.stroke();
+ }
+ }
+
+ ctx.save();
+ ctx.translate(plotOffset.left, plotOffset.top);
+
+ var lw = series.points.lineWidth,
+ sw = series.shadowSize,
+ radius = series.points.radius,
+ symbol = series.points.symbol;
+ if (lw > 0 && sw > 0) {
+ // draw shadow in two steps
+ var w = sw / 2;
+ ctx.lineWidth = w;
+ ctx.strokeStyle = "rgba(0,0,0,0.1)";
+ plotPoints(series.datapoints, radius, null, w + w/2, true,
+ series.xaxis, series.yaxis, symbol);
+
+ ctx.strokeStyle = "rgba(0,0,0,0.2)";
+ plotPoints(series.datapoints, radius, null, w/2, true,
+ series.xaxis, series.yaxis, symbol);
+ }
+
+ ctx.lineWidth = lw;
+ ctx.strokeStyle = series.color;
+ plotPoints(series.datapoints, radius,
+ getFillStyle(series.points, series.color), 0, false,
+ series.xaxis, series.yaxis, symbol);
+ ctx.restore();
+ }
+
+ function drawBar(x, y, b, barLeft, barRight, offset, fillStyleCallback, axisx, axisy, c, horizontal, lineWidth) {
+ var left, right, bottom, top,
+ drawLeft, drawRight, drawTop, drawBottom,
+ tmp;
+
+ // in horizontal mode, we start the bar from the left
+ // instead of from the bottom so it appears to be
+ // horizontal rather than vertical
+ if (horizontal) {
+ drawBottom = drawRight = drawTop = true;
+ drawLeft = false;
+ left = b;
+ right = x;
+ top = y + barLeft;
+ bottom = y + barRight;
+
+ // account for negative bars
+ if (right < left) {
+ tmp = right;
+ right = left;
+ left = tmp;
+ drawLeft = true;
+ drawRight = false;
+ }
+ }
+ else {
+ drawLeft = drawRight = drawTop = true;
+ drawBottom = false;
+ left = x + barLeft;
+ right = x + barRight;
+ bottom = b;
+ top = y;
+
+ // account for negative bars
+ if (top < bottom) {
+ tmp = top;
+ top = bottom;
+ bottom = tmp;
+ drawBottom = true;
+ drawTop = false;
+ }
+ }
+
+ // clip
+ if (right < axisx.min || left > axisx.max ||
+ top < axisy.min || bottom > axisy.max)
+ return;
+
+ if (left < axisx.min) {
+ left = axisx.min;
+ drawLeft = false;
+ }
+
+ if (right > axisx.max) {
+ right = axisx.max;
+ drawRight = false;
+ }
+
+ if (bottom < axisy.min) {
+ bottom = axisy.min;
+ drawBottom = false;
+ }
+
+ if (top > axisy.max) {
+ top = axisy.max;
+ drawTop = false;
+ }
+
+ left = axisx.p2c(left);
+ bottom = axisy.p2c(bottom);
+ right = axisx.p2c(right);
+ top = axisy.p2c(top);
+
+ // fill the bar
+ if (fillStyleCallback) {
+ c.beginPath();
+ c.moveTo(left, bottom);
+ c.lineTo(left, top);
+ c.lineTo(right, top);
+ c.lineTo(right, bottom);
+ c.fillStyle = fillStyleCallback(bottom, top);
+ c.fill();
+ }
+
+ // draw outline
+ if (lineWidth > 0 && (drawLeft || drawRight || drawTop || drawBottom)) {
+ c.beginPath();
+
+ // FIXME: inline moveTo is buggy with excanvas
+ c.moveTo(left, bottom + offset);
+ if (drawLeft)
+ c.lineTo(left, top + offset);
+ else
+ c.moveTo(left, top + offset);
+ if (drawTop)
+ c.lineTo(right, top + offset);
+ else
+ c.moveTo(right, top + offset);
+ if (drawRight)
+ c.lineTo(right, bottom + offset);
+ else
+ c.moveTo(right, bottom + offset);
+ if (drawBottom)
+ c.lineTo(left, bottom + offset);
+ else
+ c.moveTo(left, bottom + offset);
+ c.stroke();
+ }
+ }
+
+ function drawSeriesBars(series) {
+ function plotBars(datapoints, barLeft, barRight, offset, fillStyleCallback, axisx, axisy) {
+ var points = datapoints.points, ps = datapoints.pointsize;
+
+ for (var i = 0; i < points.length; i += ps) {
+ if (points[i] == null)
+ continue;
+ drawBar(points[i], points[i + 1], points[i + 2], barLeft, barRight, offset, fillStyleCallback, axisx, axisy, ctx, series.bars.horizontal, series.bars.lineWidth);
+ }
+ }
+
+ ctx.save();
+ ctx.translate(plotOffset.left, plotOffset.top);
+
+ // FIXME: figure out a way to add shadows (for instance along the right edge)
+ ctx.lineWidth = series.bars.lineWidth;
+ ctx.strokeStyle = series.color;
+ var barLeft = series.bars.align == "left" ? 0 : -series.bars.barWidth/2;
+ var fillStyleCallback = series.bars.fill ? function (bottom, top) { return getFillStyle(series.bars, series.color, bottom, top); } : null;
+ plotBars(series.datapoints, barLeft, barLeft + series.bars.barWidth, 0, fillStyleCallback, series.xaxis, series.yaxis);
+ ctx.restore();
+ }
+
+ function getFillStyle(filloptions, seriesColor, bottom, top) {
+ var fill = filloptions.fill;
+ if (!fill)
+ return null;
+
+ if (filloptions.fillColor)
+ return getColorOrGradient(filloptions.fillColor, bottom, top, seriesColor);
+
+ var c = $.color.parse(seriesColor);
+ c.a = typeof fill == "number" ? fill : 0.4;
+ c.normalize();
+ return c.toString();
+ }
+
+ function insertLegend() {
+ placeholder.find(".legend").remove();
+
+ if (!options.legend.show)
+ return;
+
+ var fragments = [], rowStarted = false,
+ lf = options.legend.labelFormatter, s, label;
+ for (var i = 0; i < series.length; ++i) {
+ s = series[i];
+ label = s.label;
+ if (!label)
+ continue;
+
+ if (i % options.legend.noColumns == 0) {
+ if (rowStarted)
+ fragments.push('</tr>');
+ fragments.push('<tr>');
+ rowStarted = true;
+ }
+
+ if (lf)
+ label = lf(label, s);
+
+ fragments.push(
+ '<td class="legendColorBox"><div style="border:1px solid ' + options.legend.labelBoxBorderColor + ';padding:1px"><div style="width:4px;height:0;border:5px solid ' + s.color + ';overflow:hidden"></div></div></td>' +
+ '<td class="legendLabel">' + label + '</td>');
+ }
+ if (rowStarted)
+ fragments.push('</tr>');
+
+ if (fragments.length == 0)
+ return;
+
+ var table = '<table style="font-size:smaller;color:' + options.grid.color + '">' + fragments.join("") + '</table>';
+ if (options.legend.container != null)
+ $(options.legend.container).html(table);
+ else {
+ var pos = "",
+ p = options.legend.position,
+ m = options.legend.margin;
+ if (m[0] == null)
+ m = [m, m];
+ if (p.charAt(0) == "n")
+ pos += 'top:' + (m[1] + plotOffset.top) + 'px;';
+ else if (p.charAt(0) == "s")
+ pos += 'bottom:' + (m[1] + plotOffset.bottom) + 'px;';
+ if (p.charAt(1) == "e")
+ pos += 'right:' + (m[0] + plotOffset.right) + 'px;';
+ else if (p.charAt(1) == "w")
+ pos += 'left:' + (m[0] + plotOffset.left) + 'px;';
+ var legend = $('<div class="legend">' + table.replace('style="', 'style="position:absolute;' + pos +';') + '</div>').appendTo(placeholder);
+ if (options.legend.backgroundOpacity != 0.0) {
+ // put in the transparent background
+ // separately to avoid blended labels and
+ // label boxes
+ var c = options.legend.backgroundColor;
+ if (c == null) {
+ c = options.grid.backgroundColor;
+ if (c && typeof c == "string")
+ c = $.color.parse(c);
+ else
+ c = $.color.extract(legend, 'background-color');
+ c.a = 1;
+ c = c.toString();
+ }
+ var div = legend.children();
+ $('<div style="position:absolute;width:' + div.width() + 'px;height:' + div.height() + 'px;' + pos +'background-color:' + c + ';"> </div>').prependTo(legend).css('opacity', options.legend.backgroundOpacity);
+ }
+ }
+ }
+
+
+ // interactive features
+
+ var highlights = [],
+ redrawTimeout = null;
+
+ // returns the data item the mouse is over, or null if none is found
+ function findNearbyItem(mouseX, mouseY, seriesFilter) {
+ var maxDistance = options.grid.mouseActiveRadius,
+ smallestDistance = maxDistance * maxDistance + 1,
+ item = null, foundPoint = false, i, j;
+
+ for (i = series.length - 1; i >= 0; --i) {
+ if (!seriesFilter(series[i]))
+ continue;
+
+ var s = series[i],
+ axisx = s.xaxis,
+ axisy = s.yaxis,
+ points = s.datapoints.points,
+ ps = s.datapoints.pointsize,
+ mx = axisx.c2p(mouseX), // precompute some stuff to make the loop faster
+ my = axisy.c2p(mouseY),
+ maxx = maxDistance / axisx.scale,
+ maxy = maxDistance / axisy.scale;
+
+ // with inverse transforms, we can't use the maxx/maxy
+ // optimization, sadly
+ if (axisx.options.inverseTransform)
+ maxx = Number.MAX_VALUE;
+ if (axisy.options.inverseTransform)
+ maxy = Number.MAX_VALUE;
+
+ if (s.lines.show || s.points.show) {
+ for (j = 0; j < points.length; j += ps) {
+ var x = points[j], y = points[j + 1];
+ if (x == null)
+ continue;
+
+ // For points and lines, the cursor must be within a
+ // certain distance to the data point
+ if (x - mx > maxx || x - mx < -maxx ||
+ y - my > maxy || y - my < -maxy)
+ continue;
+
+ // We have to calculate distances in pixels, not in
+ // data units, because the scales of the axes may be different
+ var dx = Math.abs(axisx.p2c(x) - mouseX),
+ dy = Math.abs(axisy.p2c(y) - mouseY),
+ dist = dx * dx + dy * dy; // we save the sqrt
+
+ // use <= to ensure last point takes precedence
+ // (last generally means on top of)
+ if (dist < smallestDistance) {
+ smallestDistance = dist;
+ item = [i, j / ps];
+ }
+ }
+ }
+
+ if (s.bars.show && !item) { // no other point can be nearby
+ var barLeft = s.bars.align == "left" ? 0 : -s.bars.barWidth/2,
+ barRight = barLeft + s.bars.barWidth;
+
+ for (j = 0; j < points.length; j += ps) {
+ var x = points[j], y = points[j + 1], b = points[j + 2];
+ if (x == null)
+ continue;
+
+ // for a bar graph, the cursor must be inside the bar
+ if (series[i].bars.horizontal ?
+ (mx <= Math.max(b, x) && mx >= Math.min(b, x) &&
+ my >= y + barLeft && my <= y + barRight) :
+ (mx >= x + barLeft && mx <= x + barRight &&
+ my >= Math.min(b, y) && my <= Math.max(b, y)))
+ item = [i, j / ps];
+ }
+ }
+ }
+
+ if (item) {
+ i = item[0];
+ j = item[1];
+ ps = series[i].datapoints.pointsize;
+
+ return { datapoint: series[i].datapoints.points.slice(j * ps, (j + 1) * ps),
+ dataIndex: j,
+ series: series[i],
+ seriesIndex: i };
+ }
+
+ return null;
+ }
+
+ function onMouseMove(e) {
+ if (options.grid.hoverable)
+ triggerClickHoverEvent("plothover", e,
+ function (s) { return s["hoverable"] != false; });
+ }
+
+ function onMouseLeave(e) {
+ if (options.grid.hoverable)
+ triggerClickHoverEvent("plothover", e,
+ function (s) { return false; });
+ }
+
+ function onClick(e) {
+ triggerClickHoverEvent("plotclick", e,
+ function (s) { return s["clickable"] != false; });
+ }
+
+ // trigger click or hover event (they send the same parameters
+ // so we share their code)
+ function triggerClickHoverEvent(eventname, event, seriesFilter) {
+ var offset = eventHolder.offset(),
+ canvasX = event.pageX - offset.left - plotOffset.left,
+ canvasY = event.pageY - offset.top - plotOffset.top,
+ pos = canvasToAxisCoords({ left: canvasX, top: canvasY });
+
+ pos.pageX = event.pageX;
+ pos.pageY = event.pageY;
+
+ var item = findNearbyItem(canvasX, canvasY, seriesFilter);
+
+ if (item) {
+ // fill in mouse pos for any listeners out there
+ item.pageX = parseInt(item.series.xaxis.p2c(item.datapoint[0]) + offset.left + plotOffset.left);
+ item.pageY = parseInt(item.series.yaxis.p2c(item.datapoint[1]) + offset.top + plotOffset.top);
+ }
+
+ if (options.grid.autoHighlight) {
+ // clear auto-highlights
+ for (var i = 0; i < highlights.length; ++i) {
+ var h = highlights[i];
+ if (h.auto == eventname &&
+ !(item && h.series == item.series &&
+ h.point[0] == item.datapoint[0] &&
+ h.point[1] == item.datapoint[1]))
+ unhighlight(h.series, h.point);
+ }
+
+ if (item)
+ highlight(item.series, item.datapoint, eventname);
+ }
+
+ placeholder.trigger(eventname, [ pos, item ]);
+ }
+
+ function triggerRedrawOverlay() {
+ if (!redrawTimeout)
+ redrawTimeout = setTimeout(drawOverlay, 30);
+ }
+
+ function drawOverlay() {
+ redrawTimeout = null;
+
+ // draw highlights
+ octx.save();
+ octx.clearRect(0, 0, canvasWidth, canvasHeight);
+ octx.translate(plotOffset.left, plotOffset.top);
+
+ var i, hi;
+ for (i = 0; i < highlights.length; ++i) {
+ hi = highlights[i];
+
+ if (hi.series.bars.show)
+ drawBarHighlight(hi.series, hi.point);
+ else
+ drawPointHighlight(hi.series, hi.point);
+ }
+ octx.restore();
+
+ executeHooks(hooks.drawOverlay, [octx]);
+ }
+
+ function highlight(s, point, auto) {
+ if (typeof s == "number")
+ s = series[s];
+
+ if (typeof point == "number") {
+ var ps = s.datapoints.pointsize;
+ point = s.datapoints.points.slice(ps * point, ps * (point + 1));
+ }
+
+ var i = indexOfHighlight(s, point);
+ if (i == -1) {
+ highlights.push({ series: s, point: point, auto: auto });
+
+ triggerRedrawOverlay();
+ }
+ else if (!auto)
+ highlights[i].auto = false;
+ }
+
+ function unhighlight(s, point) {
+ if (s == null && point == null) {
+ highlights = [];
+ triggerRedrawOverlay();
+ }
+
+ if (typeof s == "number")
+ s = series[s];
+
+ if (typeof point == "number")
+ point = s.data[point];
+
+ var i = indexOfHighlight(s, point);
+ if (i != -1) {
+ highlights.splice(i, 1);
+
+ triggerRedrawOverlay();
+ }
+ }
+
+ function indexOfHighlight(s, p) {
+ for (var i = 0; i < highlights.length; ++i) {
+ var h = highlights[i];
+ if (h.series == s && h.point[0] == p[0]
+ && h.point[1] == p[1])
+ return i;
+ }
+ return -1;
+ }
+
+ function drawPointHighlight(series, point) {
+ var x = point[0], y = point[1],
+ axisx = series.xaxis, axisy = series.yaxis;
+
+ if (x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max)
+ return;
+
+ var pointRadius = series.points.radius + series.points.lineWidth / 2;
+ octx.lineWidth = pointRadius;
+ octx.strokeStyle = $.color.parse(series.color).scale('a', 0.5).toString();
+ var radius = 1.5 * pointRadius,
+ x = axisx.p2c(x),
+ y = axisy.p2c(y);
+
+ octx.beginPath();
+ if (series.points.symbol == "circle")
+ octx.arc(x, y, radius, 0, 2 * Math.PI, false);
+ else
+ series.points.symbol(octx, x, y, radius, false);
+ octx.closePath();
+ octx.stroke();
+ }
+
+ function drawBarHighlight(series, point) {
+ octx.lineWidth = series.bars.lineWidth;
+ octx.strokeStyle = $.color.parse(series.color).scale('a', 0.5).toString();
+ var fillStyle = $.color.parse(series.color).scale('a', 0.5).toString();
+ var barLeft = series.bars.align == "left" ? 0 : -series.bars.barWidth/2;
+ drawBar(point[0], point[1], point[2] || 0, barLeft, barLeft + series.bars.barWidth,
+ 0, function () { return fillStyle; }, series.xaxis, series.yaxis, octx, series.bars.horizontal, series.bars.lineWidth);
+ }
+
+ function getColorOrGradient(spec, bottom, top, defaultColor) {
+ if (typeof spec == "string")
+ return spec;
+ else {
+ // assume this is a gradient spec; IE currently only
+ // supports a simple vertical gradient properly, so that's
+ // what we support too
+ var gradient = ctx.createLinearGradient(0, top, 0, bottom);
+
+ for (var i = 0, l = spec.colors.length; i < l; ++i) {
+ var c = spec.colors[i];
+ if (typeof c != "string") {
+ var co = $.color.parse(defaultColor);
+ if (c.brightness != null)
+ co = co.scale('rgb', c.brightness)
+ if (c.opacity != null)
+ co.a *= c.opacity;
+ c = co.toString();
+ }
+ gradient.addColorStop(i / (l - 1), c);
+ }
+
+ return gradient;
+ }
+ }
+ }
+
+ $.plot = function(placeholder, data, options) {
+ //var t0 = new Date();
+ var plot = new Plot($(placeholder), data, options, $.plot.plugins);
+ //(window.console ? console.log : alert)("time used (msecs): " + ((new Date()).getTime() - t0.getTime()));
+ return plot;
+ };
+
+ $.plot.version = "0.7";
+
+ $.plot.plugins = [];
+
+ // returns a string with the date d formatted according to fmt
+ $.plot.formatDate = function(d, fmt, monthNames) {
+ var leftPad = function(n) {
+ n = "" + n;
+ return n.length == 1 ? "0" + n : n;
+ };
+
+ var r = [];
+ var escape = false, padNext = false;
+ var hours = d.getUTCHours();
+ var isAM = hours < 12;
+ if (monthNames == null)
+ monthNames = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
+
+ if (fmt.search(/%p|%P/) != -1) {
+ if (hours > 12) {
+ hours = hours - 12;
+ } else if (hours == 0) {
+ hours = 12;
+ }
+ }
+ for (var i = 0; i < fmt.length; ++i) {
+ var c = fmt.charAt(i);
+
+ if (escape) {
+ switch (c) {
+ case 'h': c = "" + hours; break;
+ case 'H': c = leftPad(hours); break;
+ case 'M': c = leftPad(d.getUTCMinutes()); break;
+ case 'S': c = leftPad(d.getUTCSeconds()); break;
+ case 'd': c = "" + d.getUTCDate(); break;
+ case 'm': c = "" + (d.getUTCMonth() + 1); break;
+ case 'y': c = "" + d.getUTCFullYear(); break;
+ case 'b': c = "" + monthNames[d.getUTCMonth()]; break;
+ case 'p': c = (isAM) ? ("" + "am") : ("" + "pm"); break;
+ case 'P': c = (isAM) ? ("" + "AM") : ("" + "PM"); break;
+ case '0': c = ""; padNext = true; break;
+ }
+ if (c && padNext) {
+ c = leftPad(c);
+ padNext = false;
+ }
+ r.push(c);
+ if (!padNext)
+ escape = false;
+ }
+ else {
+ if (c == "%")
+ escape = true;
+ else
+ r.push(c);
+ }
+ }
+ return r.join("");
+ };
+
+ // round to nearby lower multiple of base
+ function floorInBase(n, base) {
+ return base * Math.floor(n / base);
+ }
+
+})(jQuery);
|