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1779 lines
69 KiB
JavaScript
1779 lines
69 KiB
JavaScript
/* Javascript plotting library for jQuery, v. 0.4.
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*
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* Released under the MIT license by iola, December 2007.
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*
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*/
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(function($) {
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function Plot(target_, data_, options_) {
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// data is on the form:
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// [ series1, series2 ... ]
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// where series is either just the data as [ [x1, y1], [x2, y2], ... ]
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// or { data: [ [x1, y1], [x2, y2], ... ], label: "some label" }
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var series = [];
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var options = {
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// the color theme used for graphs
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colors: ["#edc240", "#afd8f8", "#cb4b4b", "#4da74d", "#9440ed"],
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legend: {
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show: true,
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noColumns: 1, // number of colums in legend table
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labelFormatter: null, // fn: string -> string
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labelBoxBorderColor: "#ccc", // border color for the little label boxes
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container: null, // container (as jQuery object) to put legend in, null means default on top of graph
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position: "ne", // position of default legend container within plot
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margin: 5, // distance from grid edge to default legend container within plot
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backgroundColor: null, // null means auto-detect
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backgroundOpacity: 0.85 // set to 0 to avoid background
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},
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xaxis: {
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mode: null, // null or "time"
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min: null, // min. value to show, null means set automatically
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max: null, // max. value to show, null means set automatically
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autoscaleMargin: null, // margin in % to add if auto-setting min/max
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ticks: null, // either [1, 3] or [[1, "a"], 3] or (fn: axis info -> ticks) or app. number of ticks for auto-ticks
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tickFormatter: null, // fn: number -> string
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labelWidth: null, // size of tick labels in pixels
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labelHeight: null,
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// mode specific options
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tickDecimals: null, // no. of decimals, null means auto
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tickSize: null, // number or [number, "unit"]
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minTickSize: null, // number or [number, "unit"]
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monthNames: null, // list of names of months
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timeformat: null // format string to use
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},
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yaxis: {
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autoscaleMargin: 0.02
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},
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points: {
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show: false,
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radius: 3,
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lineWidth: 2, // in pixels
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fill: true,
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fillColor: "#ffffff"
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},
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lines: {
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show: false,
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lineWidth: 2, // in pixels
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fill: false,
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fillColor: null
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},
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bars: {
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show: false,
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lineWidth: 2, // in pixels
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barWidth: 1, // in units of the x axis
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fill: true,
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fillColor: null
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},
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grid: {
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color: "#545454", // primary color used for outline and labels
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backgroundColor: null, // null for transparent, else color
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tickColor: "#dddddd", // color used for the ticks
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labelMargin: 3, // in pixels
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borderWidth: 2,
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clickable: null,
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coloredAreas: null, // array of { x1, y1, x2, y2 } or fn: plot area -> areas
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coloredAreasColor: "#f4f4f4"
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},
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selection: {
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mode: null, // one of null, "x", "y" or "xy"
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color: "#e8cfac"
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},
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shadowSize: 4
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};
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var canvas = null, overlay = null, eventHolder = null,
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ctx = null, octx = null,
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target = target_,
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xaxis = {}, yaxis = {},
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plotOffset = { left: 0, right: 0, top: 0, bottom: 0},
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canvasWidth = 0, canvasHeight = 0,
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plotWidth = 0, plotHeight = 0,
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hozScale = 0, vertScale = 0,
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// dedicated to storing data for buggy standard compliance cases
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workarounds = {};
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this.setData = setData;
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this.setupGrid = setupGrid;
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this.draw = draw;
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this.clearSelection = clearSelection;
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this.setSelection = setSelection;
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this.getCanvas = function() { return canvas; };
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this.getPlotOffset = function() { return plotOffset; };
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this.getData = function() { return series; };
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this.getAxes = function() { return { xaxis: xaxis, yaxis: yaxis }; };
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// initialize
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parseOptions(options_);
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setData(data_);
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constructCanvas();
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setupGrid();
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draw();
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function setData(d) {
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series = parseData(d);
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fillInSeriesOptions();
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processData();
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}
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function parseData(d) {
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var res = [];
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for (var i = 0; i < d.length; ++i) {
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var s;
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if (d[i].data) {
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s = {};
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for (var v in d[i])
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s[v] = d[i][v];
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}
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else {
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s = { data: d[i] };
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}
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res.push(s);
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}
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return res;
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}
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function parseOptions(o) {
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$.extend(true, options, o);
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// backwards compatibility, to be removed in future
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if (options.xaxis.noTicks && options.xaxis.ticks == null)
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options.xaxis.ticks = options.xaxis.noTicks;
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if (options.yaxis.noTicks && options.yaxis.ticks == null)
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options.yaxis.ticks = options.yaxis.noTicks;
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}
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function fillInSeriesOptions() {
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var i;
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// collect what we already got of colors
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var neededColors = series.length;
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var usedColors = [];
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var assignedColors = [];
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for (i = 0; i < series.length; ++i) {
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var sc = series[i].color;
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if (sc != null) {
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--neededColors;
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if (typeof sc == "number")
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assignedColors.push(sc);
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else
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usedColors.push(parseColor(series[i].color));
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}
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}
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// we might need to generate more colors if higher indices
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// are assigned
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for (i = 0; i < assignedColors.length; ++i) {
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neededColors = Math.max(neededColors, assignedColors[i] + 1);
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}
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// produce colors as needed
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var colors = [];
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var variation = 0;
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i = 0;
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while (colors.length < neededColors) {
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var c;
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if (options.colors.length == i) // check degenerate case
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c = new Color(100, 100, 100);
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else
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c = parseColor(options.colors[i]);
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// vary color if needed
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var sign = variation % 2 == 1 ? -1 : 1;
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var factor = 1 + sign * Math.ceil(variation / 2) * 0.2;
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c.scale(factor, factor, factor);
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// FIXME: if we're getting to close to something else,
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// we should probably skip this one
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colors.push(c);
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++i;
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if (i >= options.colors.length) {
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i = 0;
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++variation;
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}
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}
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// fill in the options
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var colori = 0, s;
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for (i = 0; i < series.length; ++i) {
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s = series[i];
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// assign colors
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if (s.color == null) {
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s.color = colors[colori].toString();
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++colori;
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}
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else if (typeof s.color == "number")
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s.color = colors[s.color].toString();
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// copy the rest
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s.lines = $.extend(true, {}, options.lines, s.lines);
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s.points = $.extend(true, {}, options.points, s.points);
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s.bars = $.extend(true, {}, options.bars, s.bars);
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if (s.shadowSize == null)
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s.shadowSize = options.shadowSize;
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}
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}
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function processData() {
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var top_sentry = Number.POSITIVE_INFINITY,
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bottom_sentry = Number.NEGATIVE_INFINITY;
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xaxis.datamin = yaxis.datamin = top_sentry;
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xaxis.datamax = yaxis.datamax = bottom_sentry;
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for (var i = 0; i < series.length; ++i) {
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var data = series[i].data;
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for (var j = 0; j < data.length; ++j) {
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if (data[j] == null)
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continue;
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var x = data[j][0], y = data[j][1];
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// convert to number
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if (x == null || y == null || isNaN(x = +x) || isNaN(y = +y)) {
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data[j] = null; // mark this point as invalid
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continue;
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}
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if (x < xaxis.datamin)
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xaxis.datamin = x;
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if (x > xaxis.datamax)
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xaxis.datamax = x;
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if (y < yaxis.datamin)
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yaxis.datamin = y;
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if (y > yaxis.datamax)
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yaxis.datamax = y;
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}
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}
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if (xaxis.datamin == top_sentry)
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xaxis.datamin = 0;
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if (yaxis.datamin == top_sentry)
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yaxis.datamin = 0;
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if (xaxis.datamax == bottom_sentry)
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xaxis.datamax = 1;
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if (yaxis.datamax == bottom_sentry)
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yaxis.datamax = 1;
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}
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function constructCanvas() {
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canvasWidth = target.width();
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canvasHeight = target.height();
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target.html(""); // clear target
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target.css("position", "relative"); // for positioning labels and overlay
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if (canvasWidth <= 0 || canvasHeight <= 0)
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throw "Invalid dimensions for plot, width = " + canvasWidth + ", height = " + canvasHeight;
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// the canvas
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canvas = $('<canvas width="' + canvasWidth + '" height="' + canvasHeight + '"></canvas>').appendTo(target).get(0);
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if ($.browser.msie) // excanvas hack
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canvas = window.G_vmlCanvasManager.initElement(canvas);
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ctx = canvas.getContext("2d");
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// overlay canvas for interactive features
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overlay = $('<canvas style="position:absolute;left:0px;top:0px;" width="' + canvasWidth + '" height="' + canvasHeight + '"></canvas>').appendTo(target).get(0);
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if ($.browser.msie) // excanvas hack
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overlay = window.G_vmlCanvasManager.initElement(overlay);
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octx = overlay.getContext("2d");
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// we include the canvas in the event holder too, because IE 7
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// sometimes has trouble with the stacking order
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eventHolder = $([overlay, canvas]);
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// bind events
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if (options.selection.mode != null) {
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eventHolder.mousedown(onMouseDown);
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// FIXME: temp. work-around until jQuery bug 1871 is fixed
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eventHolder.each(function () {
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this.onmousemove = onMouseMove;
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});
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}
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if (options.grid.clickable)
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eventHolder.click(onClick);
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}
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function setupGrid() {
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// x axis
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setRange(xaxis, options.xaxis);
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prepareTickGeneration(xaxis, options.xaxis);
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setTicks(xaxis, options.xaxis);
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extendXRangeIfNeededByBar();
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// y axis
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setRange(yaxis, options.yaxis);
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prepareTickGeneration(yaxis, options.yaxis);
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setTicks(yaxis, options.yaxis);
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setSpacing();
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insertLabels();
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insertLegend();
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}
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function setRange(axis, axisOptions) {
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var min = axisOptions.min != null ? axisOptions.min : axis.datamin;
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var max = axisOptions.max != null ? axisOptions.max : axis.datamax;
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if (max - min == 0.0) {
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// degenerate case
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var widen;
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if (max == 0.0)
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widen = 1.0;
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else
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widen = 0.01;
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min -= widen;
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max += widen;
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}
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else {
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// consider autoscaling
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var margin = axisOptions.autoscaleMargin;
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if (margin != null) {
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if (axisOptions.min == null) {
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min -= (max - min) * margin;
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// make sure we don't go below zero if all values
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// are positive
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if (min < 0 && axis.datamin >= 0)
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min = 0;
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}
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if (axisOptions.max == null) {
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max += (max - min) * margin;
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if (max > 0 && axis.datamax <= 0)
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max = 0;
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}
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}
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}
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axis.min = min;
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axis.max = max;
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}
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function prepareTickGeneration(axis, axisOptions) {
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// estimate number of ticks
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var noTicks;
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if (typeof axisOptions.ticks == "number" && axisOptions.ticks > 0)
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noTicks = axisOptions.ticks;
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else if (axis == xaxis)
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noTicks = canvasWidth / 100;
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else
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noTicks = canvasHeight / 60;
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var delta = (axis.max - axis.min) / noTicks;
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var size, generator, unit, formatter, i, magn, norm;
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if (axisOptions.mode == "time") {
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// pretty handling of time
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function formatDate(d, fmt, monthNames) {
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var leftPad = function(n) {
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n = "" + n;
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return n.length == 1 ? "0" + n : n;
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};
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var r = [];
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var escape = false;
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if (monthNames == null)
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monthNames = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
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for (var i = 0; i < fmt.length; ++i) {
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var c = fmt.charAt(i);
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if (escape) {
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switch (c) {
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case 'h': c = "" + d.getUTCHours(); break;
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case 'H': c = leftPad(d.getUTCHours()); break;
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case 'M': c = leftPad(d.getUTCMinutes()); break;
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case 'S': c = leftPad(d.getUTCSeconds()); break;
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case 'd': c = "" + d.getUTCDate(); break;
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case 'm': c = "" + (d.getUTCMonth() + 1); break;
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case 'y': c = "" + d.getUTCFullYear(); break;
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case 'b': c = "" + monthNames[d.getUTCMonth()]; break;
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}
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r.push(c);
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escape = false;
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}
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else {
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if (c == "%")
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escape = true;
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else
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r.push(c);
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}
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}
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return r.join("");
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}
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// map of app. size of time units in milliseconds
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var timeUnitSize = {
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"second": 1000,
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"minute": 60 * 1000,
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"hour": 60 * 60 * 1000,
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"day": 24 * 60 * 60 * 1000,
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"month": 30 * 24 * 60 * 60 * 1000,
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"year": 365.2425 * 24 * 60 * 60 * 1000
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};
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// the allowed tick sizes, after 1 year we use
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// an integer algorithm
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var spec = [
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[1, "second"], [2, "second"], [5, "second"], [10, "second"],
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[30, "second"],
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[1, "minute"], [2, "minute"], [5, "minute"], [10, "minute"],
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[30, "minute"],
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[1, "hour"], [2, "hour"], [4, "hour"],
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[8, "hour"], [12, "hour"],
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[1, "day"], [2, "day"], [3, "day"],
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[0.25, "month"], [0.5, "month"], [1, "month"],
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[2, "month"], [3, "month"], [6, "month"],
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[1, "year"]
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];
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var minSize = 0;
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if (axisOptions.minTickSize != null) {
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if (typeof axisOptions.tickSize == "number")
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minSize = axisOptions.tickSize;
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else
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minSize = axisOptions.minTickSize[0] * timeUnitSize[axisOptions.minTickSize[1]];
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}
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for (i = 0; i < spec.length - 1; ++i)
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if (delta < (spec[i][0] * timeUnitSize[spec[i][1]]
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+ spec[i + 1][0] * timeUnitSize[spec[i + 1][1]]) / 2
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&& spec[i][0] * timeUnitSize[spec[i][1]] >= minSize)
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break;
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size = spec[i][0];
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unit = spec[i][1];
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// special-case the possibility of several years
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if (unit == "year") {
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magn = Math.pow(10, Math.floor(Math.log(delta / timeUnitSize.year) / Math.LN10));
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norm = (delta / timeUnitSize.year) / magn;
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if (norm < 1.5)
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size = 1;
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else if (norm < 3)
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size = 2;
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else if (norm < 7.5)
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size = 5;
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else
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size = 10;
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size *= magn;
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}
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if (axisOptions.tickSize) {
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size = axisOptions.tickSize[0];
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unit = axisOptions.tickSize[1];
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}
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generator = function(axis) {
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var ticks = [],
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tickSize = axis.tickSize[0], unit = axis.tickSize[1],
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d = new Date(axis.min);
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var step = tickSize * timeUnitSize[unit];
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if (unit == "second")
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d.setUTCSeconds(floorInBase(d.getUTCSeconds(), tickSize));
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if (unit == "minute")
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d.setUTCMinutes(floorInBase(d.getUTCMinutes(), tickSize));
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if (unit == "hour")
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d.setUTCHours(floorInBase(d.getUTCHours(), tickSize));
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if (unit == "month")
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d.setUTCMonth(floorInBase(d.getUTCMonth(), tickSize));
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if (unit == "year")
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d.setUTCFullYear(floorInBase(d.getUTCFullYear(), tickSize));
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// reset smaller components
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d.setUTCMilliseconds(0);
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if (step >= timeUnitSize.minute)
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d.setUTCSeconds(0);
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if (step >= timeUnitSize.hour)
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d.setUTCMinutes(0);
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if (step >= timeUnitSize.day)
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d.setUTCHours(0);
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if (step >= timeUnitSize.day * 4)
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d.setUTCDate(1);
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if (step >= timeUnitSize.year)
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d.setUTCMonth(0);
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var carry = 0, v = Number.NaN, prev;
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do {
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prev = v;
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v = d.getTime();
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ticks.push({ v: v, label: axis.tickFormatter(v, axis) });
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if (unit == "month") {
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if (tickSize < 1) {
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// a bit complicated - we'll divide the month
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// up but we need to take care of fractions
|
|
// so we don't end up in the middle of a day
|
|
d.setUTCDate(1);
|
|
var start = d.getTime();
|
|
d.setUTCMonth(d.getUTCMonth() + 1);
|
|
var end = d.getTime();
|
|
d.setTime(v + carry * timeUnitSize.hour + (end - start) * tickSize);
|
|
carry = d.getUTCHours();
|
|
d.setUTCHours(0);
|
|
}
|
|
else
|
|
d.setUTCMonth(d.getUTCMonth() + tickSize);
|
|
}
|
|
else if (unit == "year") {
|
|
d.setUTCFullYear(d.getUTCFullYear() + tickSize);
|
|
}
|
|
else
|
|
d.setTime(v + step);
|
|
} while (v < axis.max && v != prev);
|
|
|
|
return ticks;
|
|
};
|
|
|
|
formatter = function (v, axis) {
|
|
var d = new Date(v);
|
|
|
|
// first check global format
|
|
if (axisOptions.timeformat != null)
|
|
return formatDate(d, axisOptions.timeformat, axisOptions.monthNames);
|
|
|
|
var t = axis.tickSize[0] * timeUnitSize[axis.tickSize[1]];
|
|
var span = axis.max - axis.min;
|
|
|
|
if (t < timeUnitSize.minute)
|
|
fmt = "%h:%M:%S";
|
|
else if (t < timeUnitSize.day) {
|
|
if (span < 2 * timeUnitSize.day)
|
|
fmt = "%h:%M";
|
|
else
|
|
fmt = "%b %d %h:%M";
|
|
}
|
|
else if (t < timeUnitSize.month)
|
|
fmt = "%b %d";
|
|
else if (t < timeUnitSize.year) {
|
|
if (span < timeUnitSize.year)
|
|
fmt = "%b";
|
|
else
|
|
fmt = "%b %y";
|
|
}
|
|
else
|
|
fmt = "%y";
|
|
|
|
return formatDate(d, fmt, axisOptions.monthNames);
|
|
};
|
|
}
|
|
else {
|
|
// pretty rounding of base-10 numbers
|
|
var maxDec = axisOptions.tickDecimals;
|
|
var dec = -Math.floor(Math.log(delta) / Math.LN10);
|
|
if (maxDec != null && dec > maxDec)
|
|
dec = maxDec;
|
|
|
|
magn = Math.pow(10, -dec);
|
|
norm = delta / magn; // norm is between 1.0 and 10.0
|
|
|
|
if (norm < 1.5)
|
|
size = 1;
|
|
else if (norm < 3) {
|
|
size = 2;
|
|
// special case for 2.5, requires an extra decimal
|
|
if (norm > 2.25 && (maxDec == null || dec + 1 <= maxDec)) {
|
|
size = 2.5;
|
|
++dec;
|
|
}
|
|
}
|
|
else if (norm < 7.5)
|
|
size = 5;
|
|
else
|
|
size = 10;
|
|
|
|
size *= magn;
|
|
|
|
if (axisOptions.minTickSize != null && size < axisOptions.minTickSize)
|
|
size = axisOptions.minTickSize;
|
|
|
|
if (axisOptions.tickSize != null)
|
|
size = axisOptions.tickSize;
|
|
|
|
axis.tickDecimals = Math.max(0, (maxDec != null) ? maxDec : dec);
|
|
|
|
generator = function (axis) {
|
|
var ticks = [];
|
|
var start = floorInBase(axis.min, axis.tickSize);
|
|
// then spew out all possible ticks
|
|
var 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 extendXRangeIfNeededByBar() {
|
|
if (options.xaxis.max == null) {
|
|
// great, we're autoscaling, check if we might need a bump
|
|
|
|
var newmax = xaxis.max;
|
|
for (var i = 0; i < series.length; ++i)
|
|
if (series[i].bars.show && series[i].bars.barWidth + xaxis.datamax > newmax)
|
|
newmax = xaxis.datamax + series[i].bars.barWidth;
|
|
xaxis.max = newmax;
|
|
}
|
|
}
|
|
|
|
function setTicks(axis, axisOptions) {
|
|
axis.ticks = [];
|
|
|
|
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() {
|
|
var i, labels = [], l;
|
|
if (yaxis.labelWidth == null || yaxis.labelHeight == null) {
|
|
// calculate y label dimensions
|
|
for (i = 0; i < yaxis.ticks.length; ++i) {
|
|
l = yaxis.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 (yaxis.labelWidth == null)
|
|
yaxis.labelWidth = dummyDiv.width();
|
|
if (yaxis.labelHeight == null)
|
|
yaxis.labelHeight = dummyDiv.find("div").height();
|
|
dummyDiv.remove();
|
|
}
|
|
|
|
if (yaxis.labelWidth == null)
|
|
yaxis.labelWidth = 0;
|
|
if (yaxis.labelHeight == null)
|
|
yaxis.labelHeight = 0;
|
|
}
|
|
|
|
var maxOutset = options.grid.borderWidth / 2;
|
|
if (options.points.show)
|
|
maxOutset = Math.max(maxOutset, options.points.radius + options.points.lineWidth/2);
|
|
for (i = 0; i < series.length; ++i) {
|
|
if (series[i].points.show)
|
|
maxOutset = Math.max(maxOutset, series[i].points.radius + series[i].points.lineWidth/2);
|
|
}
|
|
|
|
plotOffset.left = plotOffset.right = plotOffset.top = plotOffset.bottom = maxOutset;
|
|
|
|
if (yaxis.labelWidth > 0)
|
|
plotOffset.left += yaxis.labelWidth + options.grid.labelMargin;
|
|
plotWidth = canvasWidth - plotOffset.left - plotOffset.right;
|
|
|
|
// set width for labels; to avoid measuring the widths of
|
|
// the labels, we construct fixed-size boxes and put the
|
|
// labels inside them, the fixed-size boxes are easy to
|
|
// mid-align
|
|
if (xaxis.labelWidth == null)
|
|
xaxis.labelWidth = plotWidth / 6;
|
|
|
|
if (xaxis.labelHeight == null) {
|
|
// measure x label heights
|
|
labels = [];
|
|
for (i = 0; i < xaxis.ticks.length; ++i) {
|
|
l = xaxis.ticks[i].label;
|
|
if (l)
|
|
labels.push('<span class="tickLabel" width="' + xaxis.labelWidth + '">' + l + '</span>');
|
|
}
|
|
|
|
xaxis.labelHeight = 0;
|
|
if (labels.length > 0) {
|
|
var dummyDiv = $('<div style="position:absolute;top:-10000px;font-size:smaller">'
|
|
+ labels.join("") + '</div>').appendTo(target);
|
|
xaxis.labelHeight = dummyDiv.height();
|
|
dummyDiv.remove();
|
|
}
|
|
}
|
|
|
|
if (xaxis.labelHeight > 0)
|
|
plotOffset.bottom += xaxis.labelHeight + options.grid.labelMargin;
|
|
|
|
plotHeight = canvasHeight - plotOffset.bottom - plotOffset.top;
|
|
hozScale = plotWidth / (xaxis.max - xaxis.min);
|
|
vertScale = plotHeight / (yaxis.max - yaxis.min);
|
|
}
|
|
|
|
function draw() {
|
|
drawGrid();
|
|
for (var i = 0; i < series.length; i++) {
|
|
drawSeries(series[i]);
|
|
}
|
|
}
|
|
|
|
function tHoz(x) {
|
|
return (x - xaxis.min) * hozScale;
|
|
}
|
|
|
|
function tVert(y) {
|
|
return plotHeight - (y - yaxis.min) * vertScale;
|
|
}
|
|
|
|
function drawGrid() {
|
|
var i;
|
|
|
|
ctx.save();
|
|
ctx.clearRect(0, 0, canvasWidth, canvasHeight);
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
|
|
|
// draw background, if any
|
|
if (options.grid.backgroundColor) {
|
|
ctx.fillStyle = options.grid.backgroundColor;
|
|
ctx.fillRect(0, 0, plotWidth, plotHeight);
|
|
}
|
|
|
|
// draw colored areas
|
|
if (options.grid.coloredAreas) {
|
|
var areas = options.grid.coloredAreas;
|
|
if ($.isFunction(areas))
|
|
areas = areas({ xmin: xaxis.min, xmax: xaxis.max, ymin: yaxis.min, ymax: yaxis.max });
|
|
|
|
for (i = 0; i < areas.length; ++i) {
|
|
var a = areas[i];
|
|
|
|
// clip
|
|
if (a.x1 == null || a.x1 < xaxis.min)
|
|
a.x1 = xaxis.min;
|
|
if (a.x2 == null || a.x2 > xaxis.max)
|
|
a.x2 = xaxis.max;
|
|
if (a.y1 == null || a.y1 < yaxis.min)
|
|
a.y1 = yaxis.min;
|
|
if (a.y2 == null || a.y2 > yaxis.max)
|
|
a.y2 = yaxis.max;
|
|
|
|
var tmp;
|
|
if (a.x1 > a.x2) {
|
|
tmp = a.x1;
|
|
a.x1 = a.x2;
|
|
a.x2 = tmp;
|
|
}
|
|
if (a.y1 > a.y2) {
|
|
tmp = a.y1;
|
|
a.y1 = a.y2;
|
|
a.y2 = tmp;
|
|
}
|
|
|
|
if (a.x1 >= xaxis.max || a.x2 <= xaxis.min || a.x1 == a.x2
|
|
|| a.y1 >= yaxis.max || a.y2 <= yaxis.min || a.y1 == a.y2)
|
|
continue;
|
|
|
|
ctx.fillStyle = a.color || options.grid.coloredAreasColor;
|
|
ctx.fillRect(Math.floor(tHoz(a.x1)), Math.floor(tVert(a.y2)),
|
|
Math.floor(tHoz(a.x2) - tHoz(a.x1)), Math.floor(tVert(a.y1) - tVert(a.y2)));
|
|
}
|
|
}
|
|
|
|
// draw the inner grid
|
|
ctx.lineWidth = 1;
|
|
ctx.strokeStyle = options.grid.tickColor;
|
|
ctx.beginPath();
|
|
var v;
|
|
for (i = 0; i < xaxis.ticks.length; ++i) {
|
|
v = xaxis.ticks[i].v;
|
|
if (v <= xaxis.min || v >= xaxis.max)
|
|
continue; // skip those lying on the axes
|
|
|
|
ctx.moveTo(Math.floor(tHoz(v)) + ctx.lineWidth/2, 0);
|
|
ctx.lineTo(Math.floor(tHoz(v)) + ctx.lineWidth/2, plotHeight);
|
|
}
|
|
|
|
for (i = 0; i < yaxis.ticks.length; ++i) {
|
|
v = yaxis.ticks[i].v;
|
|
if (v <= yaxis.min || v >= yaxis.max)
|
|
continue;
|
|
|
|
ctx.moveTo(0, Math.floor(tVert(v)) + ctx.lineWidth/2);
|
|
ctx.lineTo(plotWidth, Math.floor(tVert(v)) + ctx.lineWidth/2);
|
|
}
|
|
ctx.stroke();
|
|
|
|
if (options.grid.borderWidth) {
|
|
// draw border
|
|
ctx.lineWidth = options.grid.borderWidth;
|
|
ctx.strokeStyle = options.grid.color;
|
|
ctx.lineJoin = "round";
|
|
ctx.strokeRect(0, 0, plotWidth, plotHeight);
|
|
ctx.restore();
|
|
}
|
|
}
|
|
|
|
function insertLabels() {
|
|
target.find(".tickLabels").remove();
|
|
|
|
var i, tick;
|
|
var html = '<div class="tickLabels" style="font-size:smaller;color:' + options.grid.color + '">';
|
|
|
|
// do the x-axis
|
|
for (i = 0; i < xaxis.ticks.length; ++i) {
|
|
tick = xaxis.ticks[i];
|
|
if (!tick.label || tick.v < xaxis.min || tick.v > xaxis.max)
|
|
continue;
|
|
html += '<div style="position:absolute;top:' + (plotOffset.top + plotHeight + options.grid.labelMargin) + 'px;left:' + (plotOffset.left + tHoz(tick.v) - xaxis.labelWidth/2) + 'px;width:' + xaxis.labelWidth + 'px;text-align:center" class="tickLabel">' + tick.label + "</div>";
|
|
}
|
|
|
|
// do the y-axis
|
|
for (i = 0; i < yaxis.ticks.length; ++i) {
|
|
tick = yaxis.ticks[i];
|
|
if (!tick.label || tick.v < yaxis.min || tick.v > yaxis.max)
|
|
continue;
|
|
html += '<div style="position:absolute;top:' + (plotOffset.top + tVert(tick.v) - yaxis.labelHeight/2) + 'px;left:0;width:' + yaxis.labelWidth + 'px;text-align:right" class="tickLabel">' + tick.label + "</div>";
|
|
}
|
|
|
|
html += '</div>';
|
|
|
|
target.append(html);
|
|
}
|
|
|
|
function drawSeries(series) {
|
|
if (series.lines.show || (!series.bars.show && !series.points.show))
|
|
drawSeriesLines(series);
|
|
if (series.bars.show)
|
|
drawSeriesBars(series);
|
|
if (series.points.show)
|
|
drawSeriesPoints(series);
|
|
}
|
|
|
|
function drawSeriesLines(series) {
|
|
function plotLine(data, offset) {
|
|
var prev, cur = null, drawx = null, drawy = null;
|
|
|
|
ctx.beginPath();
|
|
for (var i = 0; i < data.length; ++i) {
|
|
prev = cur;
|
|
cur = data[i];
|
|
|
|
if (prev == null || cur == null)
|
|
continue;
|
|
|
|
var x1 = prev[0], y1 = prev[1],
|
|
x2 = cur[0], y2 = cur[1];
|
|
|
|
// clip with ymin
|
|
if (y1 <= y2 && y1 < yaxis.min) {
|
|
if (y2 < yaxis.min)
|
|
continue; // line segment is outside
|
|
// compute new intersection point
|
|
x1 = (yaxis.min - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y1 = yaxis.min;
|
|
}
|
|
else if (y2 <= y1 && y2 < yaxis.min) {
|
|
if (y1 < yaxis.min)
|
|
continue;
|
|
x2 = (yaxis.min - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y2 = yaxis.min;
|
|
}
|
|
|
|
// clip with ymax
|
|
if (y1 >= y2 && y1 > yaxis.max) {
|
|
if (y2 > yaxis.max)
|
|
continue;
|
|
x1 = (yaxis.max - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y1 = yaxis.max;
|
|
}
|
|
else if (y2 >= y1 && y2 > yaxis.max) {
|
|
if (y1 > yaxis.max)
|
|
continue;
|
|
x2 = (yaxis.max - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y2 = yaxis.max;
|
|
}
|
|
|
|
// clip with xmin
|
|
if (x1 <= x2 && x1 < xaxis.min) {
|
|
if (x2 < xaxis.min)
|
|
continue;
|
|
y1 = (xaxis.min - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x1 = xaxis.min;
|
|
}
|
|
else if (x2 <= x1 && x2 < xaxis.min) {
|
|
if (x1 < xaxis.min)
|
|
continue;
|
|
y2 = (xaxis.min - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x2 = xaxis.min;
|
|
}
|
|
|
|
// clip with xmax
|
|
if (x1 >= x2 && x1 > xaxis.max) {
|
|
if (x2 > xaxis.max)
|
|
continue;
|
|
y1 = (xaxis.max - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x1 = xaxis.max;
|
|
}
|
|
else if (x2 >= x1 && x2 > xaxis.max) {
|
|
if (x1 > xaxis.max)
|
|
continue;
|
|
y2 = (xaxis.max - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x2 = xaxis.max;
|
|
}
|
|
|
|
if (drawx != tHoz(x1) || drawy != tVert(y1) + offset)
|
|
ctx.moveTo(tHoz(x1), tVert(y1) + offset);
|
|
|
|
drawx = tHoz(x2);
|
|
drawy = tVert(y2) + offset;
|
|
ctx.lineTo(drawx, drawy);
|
|
}
|
|
ctx.stroke();
|
|
}
|
|
|
|
function plotLineArea(data) {
|
|
var prev, cur = null;
|
|
|
|
var bottom = Math.min(Math.max(0, yaxis.min), yaxis.max);
|
|
var top, lastX = 0;
|
|
|
|
var areaOpen = false;
|
|
|
|
for (var i = 0; i < data.length; ++i) {
|
|
prev = cur;
|
|
cur = data[i];
|
|
|
|
if (areaOpen && prev != null && cur == null) {
|
|
// close area
|
|
ctx.lineTo(tHoz(lastX), tVert(bottom));
|
|
ctx.fill();
|
|
areaOpen = false;
|
|
continue;
|
|
}
|
|
|
|
if (prev == null || cur == null)
|
|
continue;
|
|
|
|
var x1 = prev[0], y1 = prev[1],
|
|
x2 = cur[0], y2 = cur[1];
|
|
|
|
// clip x values
|
|
|
|
// clip with xmin
|
|
if (x1 <= x2 && x1 < xaxis.min) {
|
|
if (x2 < xaxis.min)
|
|
continue;
|
|
y1 = (xaxis.min - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x1 = xaxis.min;
|
|
}
|
|
else if (x2 <= x1 && x2 < xaxis.min) {
|
|
if (x1 < xaxis.min)
|
|
continue;
|
|
y2 = (xaxis.min - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x2 = xaxis.min;
|
|
}
|
|
|
|
// clip with xmax
|
|
if (x1 >= x2 && x1 > xaxis.max) {
|
|
if (x2 > xaxis.max)
|
|
continue;
|
|
y1 = (xaxis.max - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x1 = xaxis.max;
|
|
}
|
|
else if (x2 >= x1 && x2 > xaxis.max) {
|
|
if (x1 > xaxis.max)
|
|
continue;
|
|
y2 = (xaxis.max - x1) / (x2 - x1) * (y2 - y1) + y1;
|
|
x2 = xaxis.max;
|
|
}
|
|
|
|
if (!areaOpen) {
|
|
// open area
|
|
ctx.beginPath();
|
|
ctx.moveTo(tHoz(x1), tVert(bottom));
|
|
areaOpen = true;
|
|
}
|
|
|
|
// now first check the case where both is outside
|
|
if (y1 >= yaxis.max && y2 >= yaxis.max) {
|
|
ctx.lineTo(tHoz(x1), tVert(yaxis.max));
|
|
ctx.lineTo(tHoz(x2), tVert(yaxis.max));
|
|
continue;
|
|
}
|
|
else if (y1 <= yaxis.min && y2 <= yaxis.min) {
|
|
ctx.lineTo(tHoz(x1), tVert(yaxis.min));
|
|
ctx.lineTo(tHoz(x2), tVert(yaxis.min));
|
|
continue;
|
|
}
|
|
|
|
// else it's a bit more complicated, there might
|
|
// be two rectangles and two triangles we need to fill
|
|
// in; to find these keep track of the current x values
|
|
var x1old = x1, x2old = x2;
|
|
|
|
// and clip the y values, without shortcutting
|
|
|
|
// clip with ymin
|
|
if (y1 <= y2 && y1 < yaxis.min && y2 >= yaxis.min) {
|
|
x1 = (yaxis.min - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y1 = yaxis.min;
|
|
}
|
|
else if (y2 <= y1 && y2 < yaxis.min && y1 >= yaxis.min) {
|
|
x2 = (yaxis.min - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y2 = yaxis.min;
|
|
}
|
|
|
|
// clip with ymax
|
|
if (y1 >= y2 && y1 > yaxis.max && y2 <= yaxis.max) {
|
|
x1 = (yaxis.max - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y1 = yaxis.max;
|
|
}
|
|
else if (y2 >= y1 && y2 > yaxis.max && y1 <= yaxis.max) {
|
|
x2 = (yaxis.max - y1) / (y2 - y1) * (x2 - x1) + x1;
|
|
y2 = yaxis.max;
|
|
}
|
|
|
|
|
|
// if the x value was changed we got a rectangle
|
|
// to fill
|
|
if (x1 != x1old) {
|
|
if (y1 <= yaxis.min)
|
|
top = yaxis.min;
|
|
else
|
|
top = yaxis.max;
|
|
|
|
ctx.lineTo(tHoz(x1old), tVert(top));
|
|
ctx.lineTo(tHoz(x1), tVert(top));
|
|
}
|
|
|
|
// fill the triangles
|
|
ctx.lineTo(tHoz(x1), tVert(y1));
|
|
ctx.lineTo(tHoz(x2), tVert(y2));
|
|
|
|
// fill the other rectangle if it's there
|
|
if (x2 != x2old) {
|
|
if (y2 <= yaxis.min)
|
|
top = yaxis.min;
|
|
else
|
|
top = yaxis.max;
|
|
|
|
ctx.lineTo(tHoz(x2old), tVert(top));
|
|
ctx.lineTo(tHoz(x2), tVert(top));
|
|
}
|
|
|
|
lastX = Math.max(x2, x2old);
|
|
}
|
|
|
|
if (areaOpen) {
|
|
ctx.lineTo(tHoz(lastX), tVert(bottom));
|
|
ctx.fill();
|
|
}
|
|
}
|
|
|
|
ctx.save();
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
|
ctx.lineJoin = "round";
|
|
|
|
var lw = series.lines.lineWidth;
|
|
var sw = series.shadowSize;
|
|
// FIXME: consider another form of shadow when filling is turned on
|
|
if (sw > 0) {
|
|
// draw shadow in two steps
|
|
ctx.lineWidth = sw / 2;
|
|
ctx.strokeStyle = "rgba(0,0,0,0.1)";
|
|
plotLine(series.data, lw/2 + sw/2 + ctx.lineWidth/2);
|
|
|
|
ctx.lineWidth = sw / 2;
|
|
ctx.strokeStyle = "rgba(0,0,0,0.2)";
|
|
plotLine(series.data, lw/2 + ctx.lineWidth/2);
|
|
}
|
|
|
|
ctx.lineWidth = lw;
|
|
ctx.strokeStyle = series.color;
|
|
setFillStyle(series.lines, series.color);
|
|
if (series.lines.fill)
|
|
plotLineArea(series.data, 0);
|
|
plotLine(series.data, 0);
|
|
ctx.restore();
|
|
}
|
|
|
|
function drawSeriesPoints(series) {
|
|
function plotPoints(data, radius, fill) {
|
|
for (var i = 0; i < data.length; ++i) {
|
|
if (data[i] == null)
|
|
continue;
|
|
|
|
var x = data[i][0], y = data[i][1];
|
|
if (x < xaxis.min || x > xaxis.max || y < yaxis.min || y > yaxis.max)
|
|
continue;
|
|
|
|
ctx.beginPath();
|
|
ctx.arc(tHoz(x), tVert(y), radius, 0, 2 * Math.PI, true);
|
|
if (fill)
|
|
ctx.fill();
|
|
ctx.stroke();
|
|
}
|
|
}
|
|
|
|
function plotPointShadows(data, offset, radius) {
|
|
for (var i = 0; i < data.length; ++i) {
|
|
if (data[i] == null)
|
|
continue;
|
|
|
|
var x = data[i][0], y = data[i][1];
|
|
if (x < xaxis.min || x > xaxis.max || y < yaxis.min || y > yaxis.max)
|
|
continue;
|
|
ctx.beginPath();
|
|
ctx.arc(tHoz(x), tVert(y) + offset, radius, 0, Math.PI, false);
|
|
ctx.stroke();
|
|
}
|
|
}
|
|
|
|
ctx.save();
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
|
|
|
var lw = series.lines.lineWidth;
|
|
var sw = series.shadowSize;
|
|
if (sw > 0) {
|
|
// draw shadow in two steps
|
|
ctx.lineWidth = sw / 2;
|
|
ctx.strokeStyle = "rgba(0,0,0,0.1)";
|
|
plotPointShadows(series.data, sw/2 + ctx.lineWidth/2, series.points.radius);
|
|
|
|
ctx.lineWidth = sw / 2;
|
|
ctx.strokeStyle = "rgba(0,0,0,0.2)";
|
|
plotPointShadows(series.data, ctx.lineWidth/2, series.points.radius);
|
|
}
|
|
|
|
ctx.lineWidth = series.points.lineWidth;
|
|
ctx.strokeStyle = series.color;
|
|
setFillStyle(series.points, series.color);
|
|
plotPoints(series.data, series.points.radius, series.points.fill);
|
|
ctx.restore();
|
|
}
|
|
|
|
function drawSeriesBars(series) {
|
|
function plotBars(data, barWidth, offset, fill) {
|
|
for (var i = 0; i < data.length; i++) {
|
|
if (data[i] == null)
|
|
continue;
|
|
|
|
var x = data[i][0], y = data[i][1];
|
|
var drawLeft = true, drawTop = true, drawRight = true;
|
|
var left = x, right = x + barWidth, bottom = 0, top = y;
|
|
|
|
if (right < xaxis.min || left > xaxis.max || top < yaxis.min || bottom > yaxis.max)
|
|
continue;
|
|
|
|
// clip
|
|
if (left < xaxis.min) {
|
|
left = xaxis.min;
|
|
drawLeft = false;
|
|
}
|
|
|
|
if (right > xaxis.max) {
|
|
right = xaxis.max;
|
|
drawRight = false;
|
|
}
|
|
|
|
if (bottom < yaxis.min)
|
|
bottom = yaxis.min;
|
|
|
|
if (top > yaxis.max) {
|
|
top = yaxis.max;
|
|
drawTop = false;
|
|
}
|
|
|
|
// fill the bar
|
|
if (fill) {
|
|
ctx.beginPath();
|
|
ctx.moveTo(tHoz(left), tVert(bottom) + offset);
|
|
ctx.lineTo(tHoz(left), tVert(top) + offset);
|
|
ctx.lineTo(tHoz(right), tVert(top) + offset);
|
|
ctx.lineTo(tHoz(right), tVert(bottom) + offset);
|
|
ctx.fill();
|
|
}
|
|
|
|
// draw outline
|
|
if (drawLeft || drawRight || drawTop) {
|
|
ctx.beginPath();
|
|
ctx.moveTo(tHoz(left), tVert(bottom) + offset);
|
|
if (drawLeft)
|
|
ctx.lineTo(tHoz(left), tVert(top) + offset);
|
|
else
|
|
ctx.moveTo(tHoz(left), tVert(top) + offset);
|
|
|
|
if (drawTop)
|
|
ctx.lineTo(tHoz(right), tVert(top) + offset);
|
|
else
|
|
ctx.moveTo(tHoz(right), tVert(top) + offset);
|
|
if (drawRight)
|
|
ctx.lineTo(tHoz(right), tVert(bottom) + offset);
|
|
else
|
|
ctx.moveTo(tHoz(right), tVert(bottom) + offset);
|
|
ctx.stroke();
|
|
}
|
|
}
|
|
}
|
|
|
|
ctx.save();
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
|
ctx.lineJoin = "round";
|
|
|
|
var bw = series.bars.barWidth;
|
|
var lw = Math.min(series.bars.lineWidth, bw);
|
|
// FIXME: figure out a way to add shadows
|
|
/*
|
|
var sw = series.shadowSize;
|
|
if (sw > 0) {
|
|
// draw shadow in two steps
|
|
ctx.lineWidth = sw / 2;
|
|
ctx.strokeStyle = "rgba(0,0,0,0.1)";
|
|
plotBars(series.data, bw, lw/2 + sw/2 + ctx.lineWidth/2, false);
|
|
|
|
ctx.lineWidth = sw / 2;
|
|
ctx.strokeStyle = "rgba(0,0,0,0.2)";
|
|
plotBars(series.data, bw, lw/2 + ctx.lineWidth/2, false);
|
|
}*/
|
|
|
|
ctx.lineWidth = lw;
|
|
ctx.strokeStyle = series.color;
|
|
setFillStyle(series.bars, series.color);
|
|
plotBars(series.data, bw, 0, series.bars.fill);
|
|
ctx.restore();
|
|
}
|
|
|
|
function setFillStyle(obj, seriesColor) {
|
|
var fill = obj.fill;
|
|
if (fill) {
|
|
if (obj.fillColor)
|
|
ctx.fillStyle = obj.fillColor;
|
|
else {
|
|
var c = parseColor(seriesColor);
|
|
c.a = typeof fill == "number" ? fill : 0.4;
|
|
c.normalize();
|
|
ctx.fillStyle = c.toString();
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
function insertLegend() {
|
|
target.find(".legend").remove();
|
|
|
|
if (!options.legend.show)
|
|
return;
|
|
|
|
var fragments = [];
|
|
var rowStarted = false;
|
|
for (i = 0; i < series.length; ++i) {
|
|
if (!series[i].label)
|
|
continue;
|
|
|
|
if (i % options.legend.noColumns == 0) {
|
|
if (rowStarted)
|
|
fragments.push('</tr>');
|
|
fragments.push('<tr>');
|
|
rowStarted = true;
|
|
}
|
|
|
|
var label = series[i].label;
|
|
if (options.legend.labelFormatter != null)
|
|
label = options.legend.labelFormatter(label);
|
|
|
|
fragments.push(
|
|
'<td class="legendColorBox"><div style="border:1px solid ' + options.legend.labelBoxBorderColor + ';padding:1px"><div style="width:14px;height:10px;background-color:' + series[i].color + ';overflow:hidden"></div></div></td>' +
|
|
'<td class="legendLabel">' + label + '</td>');
|
|
}
|
|
if (rowStarted)
|
|
fragments.push('</tr>');
|
|
|
|
if (fragments.length > 0) {
|
|
var table = '<table style="font-size:smaller;color:' + options.grid.color + '">' + fragments.join("") + '</table>';
|
|
if (options.legend.container != null)
|
|
options.legend.container.append(table);
|
|
else {
|
|
var pos = "";
|
|
var p = options.legend.position, m = options.legend.margin;
|
|
if (p.charAt(0) == "n")
|
|
pos += 'top:' + (m + plotOffset.top) + 'px;';
|
|
else if (p.charAt(0) == "s")
|
|
pos += 'bottom:' + (m + plotOffset.bottom) + 'px;';
|
|
if (p.charAt(1) == "e")
|
|
pos += 'right:' + (m + plotOffset.right) + 'px;';
|
|
else if (p.charAt(1) == "w")
|
|
pos += 'left:' + (m + plotOffset.bottom) + '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)
|
|
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);
|
|
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
var lastMousePos = { pageX: null, pageY: null };
|
|
var selection = { first: { x: -1, y: -1}, second: { x: -1, y: -1} };
|
|
var prevSelection = null;
|
|
var selectionInterval = null;
|
|
var ignoreClick = false;
|
|
|
|
function onMouseMove(ev) {
|
|
// FIXME: temp. work-around until jQuery bug 1871 is fixed
|
|
var e = ev || window.event;
|
|
if (e.pageX == null && e.clientX != null) {
|
|
var de = document.documentElement, b = document.body;
|
|
lastMousePos.pageX = e.clientX + (de && de.scrollLeft || b.scrollLeft || 0);
|
|
lastMousePos.pageY = e.clientY + (de && de.scrollTop || b.scrollTop || 0);
|
|
}
|
|
else {
|
|
lastMousePos.pageX = e.pageX;
|
|
lastMousePos.pageY = e.pageY;
|
|
}
|
|
}
|
|
|
|
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);
|
|
|
|
if (selectionInterval != null)
|
|
clearInterval(selectionInterval);
|
|
lastMousePos.pageX = null;
|
|
selectionInterval = setInterval(updateSelectionOnMouseMove, 200);
|
|
$(document).one("mouseup", onSelectionMouseUp);
|
|
}
|
|
|
|
function onClick(e) {
|
|
if (ignoreClick) {
|
|
ignoreClick = false;
|
|
return;
|
|
}
|
|
|
|
var offset = eventHolder.offset();
|
|
var pos = {};
|
|
pos.x = e.pageX - offset.left - plotOffset.left;
|
|
pos.x = xaxis.min + pos.x / hozScale;
|
|
pos.y = e.pageY - offset.top - plotOffset.top;
|
|
pos.y = yaxis.max - pos.y / vertScale;
|
|
|
|
target.trigger("plotclick", [ pos ]);
|
|
}
|
|
|
|
function triggerSelectedEvent() {
|
|
var x1, x2, y1, y2;
|
|
if (selection.first.x <= selection.second.x) {
|
|
x1 = selection.first.x;
|
|
x2 = selection.second.x;
|
|
}
|
|
else {
|
|
x1 = selection.second.x;
|
|
x2 = selection.first.x;
|
|
}
|
|
|
|
if (selection.first.y >= selection.second.y) {
|
|
y1 = selection.first.y;
|
|
y2 = selection.second.y;
|
|
}
|
|
else {
|
|
y1 = selection.second.y;
|
|
y2 = selection.first.y;
|
|
}
|
|
|
|
x1 = xaxis.min + x1 / hozScale;
|
|
x2 = xaxis.min + x2 / hozScale;
|
|
|
|
y1 = yaxis.max - y1 / vertScale;
|
|
y2 = yaxis.max - y2 / vertScale;
|
|
|
|
target.trigger("selected", [ { x1: x1, y1: y1, x2: x2, y2: y2 } ]);
|
|
}
|
|
|
|
function onSelectionMouseUp(e) {
|
|
if (document.onselectstart !== undefined)
|
|
document.onselectstart = workarounds.onselectstart;
|
|
if (document.ondrag !== undefined)
|
|
document.ondrag = workarounds.ondrag;
|
|
|
|
if (selectionInterval != null) {
|
|
clearInterval(selectionInterval);
|
|
selectionInterval = null;
|
|
}
|
|
|
|
setSelectionPos(selection.second, e);
|
|
clearSelection();
|
|
if (!selectionIsSane() || e.which != 1)
|
|
return false;
|
|
|
|
drawSelection();
|
|
triggerSelectedEvent();
|
|
ignoreClick = true;
|
|
|
|
return false;
|
|
}
|
|
|
|
function setSelectionPos(pos, e) {
|
|
var offset = $(overlay).offset();
|
|
if (options.selection.mode == "y") {
|
|
if (pos == selection.first)
|
|
pos.x = 0;
|
|
else
|
|
pos.x = plotWidth;
|
|
}
|
|
else {
|
|
pos.x = e.pageX - offset.left - plotOffset.left;
|
|
pos.x = Math.min(Math.max(0, pos.x), plotWidth);
|
|
}
|
|
|
|
if (options.selection.mode == "x") {
|
|
if (pos == selection.first)
|
|
pos.y = 0;
|
|
else
|
|
pos.y = plotHeight;
|
|
}
|
|
else {
|
|
pos.y = e.pageY - offset.top - plotOffset.top;
|
|
pos.y = Math.min(Math.max(0, pos.y), plotHeight);
|
|
}
|
|
}
|
|
|
|
function updateSelectionOnMouseMove() {
|
|
if (lastMousePos.pageX == null)
|
|
return;
|
|
|
|
setSelectionPos(selection.second, lastMousePos);
|
|
clearSelection();
|
|
if (selectionIsSane())
|
|
drawSelection();
|
|
}
|
|
|
|
function clearSelection() {
|
|
if (prevSelection == null)
|
|
return;
|
|
|
|
var x = Math.min(prevSelection.first.x, prevSelection.second.x),
|
|
y = Math.min(prevSelection.first.y, prevSelection.second.y),
|
|
w = Math.abs(prevSelection.second.x - prevSelection.first.x),
|
|
h = Math.abs(prevSelection.second.y - prevSelection.first.y);
|
|
|
|
octx.clearRect(x + plotOffset.left - octx.lineWidth,
|
|
y + plotOffset.top - octx.lineWidth,
|
|
w + octx.lineWidth*2,
|
|
h + octx.lineWidth*2);
|
|
|
|
prevSelection = null;
|
|
}
|
|
|
|
function setSelection(area) {
|
|
clearSelection();
|
|
|
|
if (options.selection.mode == "x") {
|
|
selection.first.y = 0;
|
|
selection.second.y = plotHeight;
|
|
}
|
|
else {
|
|
selection.first.y = (yaxis.max - area.y1) * vertScale;
|
|
selection.second.y = (yaxis.max - area.y2) * vertScale;
|
|
}
|
|
if (options.selection.mode == "y") {
|
|
selection.first.x = 0;
|
|
selection.second.x = plotWidth;
|
|
}
|
|
else {
|
|
selection.first.x = (area.x1 - xaxis.min) * hozScale;
|
|
selection.second.x = (area.x2 - xaxis.min) * hozScale;
|
|
}
|
|
|
|
drawSelection();
|
|
triggerSelectedEvent();
|
|
}
|
|
|
|
function drawSelection() {
|
|
if (prevSelection != null &&
|
|
selection.first.x == prevSelection.first.x &&
|
|
selection.first.y == prevSelection.first.y &&
|
|
selection.second.x == prevSelection.second.x &&
|
|
selection.second.y == prevSelection.second.y)
|
|
return;
|
|
|
|
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();
|
|
|
|
prevSelection = { first: { x: selection.first.x,
|
|
y: selection.first.y },
|
|
second: { x: selection.second.x,
|
|
y: selection.second.y } };
|
|
|
|
var x = Math.min(selection.first.x, selection.second.x),
|
|
y = Math.min(selection.first.y, selection.second.y),
|
|
w = Math.abs(selection.second.x - selection.first.x),
|
|
h = Math.abs(selection.second.y - selection.first.y);
|
|
|
|
octx.fillRect(x + plotOffset.left, y + plotOffset.top, w, h);
|
|
octx.strokeRect(x + plotOffset.left, y + plotOffset.top, w, h);
|
|
}
|
|
|
|
function selectionIsSane() {
|
|
var minSize = 5;
|
|
return Math.abs(selection.second.x - selection.first.x) >= minSize &&
|
|
Math.abs(selection.second.y - selection.first.y) >= minSize;
|
|
}
|
|
}
|
|
|
|
$.plot = function(target, data, options) {
|
|
var plot = new Plot(target, data, options);
|
|
/*var t0 = new Date();
|
|
var t1 = new Date();
|
|
var tstr = "time used (msecs): " + (t1.getTime() - t0.getTime())
|
|
if (window.console)
|
|
console.log(tstr);
|
|
else
|
|
alert(tstr);*/
|
|
return plot;
|
|
};
|
|
|
|
// round to nearby lower multiple of base
|
|
function floorInBase(n, base) {
|
|
return base * Math.floor(n / base);
|
|
}
|
|
|
|
// color helpers, inspiration from the jquery color animation
|
|
// plugin by John Resig
|
|
function Color (r, g, b, a) {
|
|
|
|
var rgba = ['r','g','b','a'];
|
|
var x = 4; //rgba.length
|
|
|
|
while (-1<--x) {
|
|
this[rgba[x]] = arguments[x] || ((x==3) ? 1.0 : 0);
|
|
}
|
|
|
|
this.toString = function() {
|
|
if (this.a >= 1.0) {
|
|
return "rgb("+[this.r,this.g,this.b].join(",")+")";
|
|
} else {
|
|
return "rgba("+[this.r,this.g,this.b,this.a].join(",")+")";
|
|
}
|
|
};
|
|
|
|
this.scale = function(rf, gf, bf, af) {
|
|
x = 4; //rgba.length
|
|
while (-1<--x) {
|
|
if (arguments[x] != null)
|
|
this[rgba[x]] *= arguments[x];
|
|
}
|
|
return this.normalize();
|
|
};
|
|
|
|
this.adjust = function(rd, gd, bd, ad) {
|
|
x = 4; //rgba.length
|
|
while (-1<--x) {
|
|
if (arguments[x] != null)
|
|
this[rgba[x]] += arguments[x];
|
|
}
|
|
return this.normalize();
|
|
};
|
|
|
|
this.clone = function() {
|
|
return new Color(this.r, this.b, this.g, this.a);
|
|
};
|
|
|
|
var limit = function(val,minVal,maxVal) {
|
|
return Math.max(Math.min(val, maxVal), minVal);
|
|
};
|
|
|
|
this.normalize = function() {
|
|
this.r = limit(parseInt(this.r), 0, 255);
|
|
this.g = limit(parseInt(this.g), 0, 255);
|
|
this.b = limit(parseInt(this.b), 0, 255);
|
|
this.a = limit(this.a, 0, 1);
|
|
return this;
|
|
};
|
|
|
|
this.normalize();
|
|
}
|
|
|
|
var lookupColors = {
|
|
aqua:[0,255,255],
|
|
azure:[240,255,255],
|
|
beige:[245,245,220],
|
|
black:[0,0,0],
|
|
blue:[0,0,255],
|
|
brown:[165,42,42],
|
|
cyan:[0,255,255],
|
|
darkblue:[0,0,139],
|
|
darkcyan:[0,139,139],
|
|
darkgrey:[169,169,169],
|
|
darkgreen:[0,100,0],
|
|
darkkhaki:[189,183,107],
|
|
darkmagenta:[139,0,139],
|
|
darkolivegreen:[85,107,47],
|
|
darkorange:[255,140,0],
|
|
darkorchid:[153,50,204],
|
|
darkred:[139,0,0],
|
|
darksalmon:[233,150,122],
|
|
darkviolet:[148,0,211],
|
|
fuchsia:[255,0,255],
|
|
gold:[255,215,0],
|
|
green:[0,128,0],
|
|
indigo:[75,0,130],
|
|
khaki:[240,230,140],
|
|
lightblue:[173,216,230],
|
|
lightcyan:[224,255,255],
|
|
lightgreen:[144,238,144],
|
|
lightgrey:[211,211,211],
|
|
lightpink:[255,182,193],
|
|
lightyellow:[255,255,224],
|
|
lime:[0,255,0],
|
|
magenta:[255,0,255],
|
|
maroon:[128,0,0],
|
|
navy:[0,0,128],
|
|
olive:[128,128,0],
|
|
orange:[255,165,0],
|
|
pink:[255,192,203],
|
|
purple:[128,0,128],
|
|
violet:[128,0,128],
|
|
red:[255,0,0],
|
|
silver:[192,192,192],
|
|
white:[255,255,255],
|
|
yellow:[255,255,0]
|
|
};
|
|
|
|
function extractColor(element) {
|
|
var color, elem = element;
|
|
do {
|
|
color = elem.css("background-color").toLowerCase();
|
|
// keep going until we find an element that has color, or
|
|
// we hit the body
|
|
if (color != '' && color != 'transparent')
|
|
break;
|
|
elem = elem.parent();
|
|
} while (!$.nodeName(elem.get(0), "body"));
|
|
|
|
// catch Safari's way of signalling transparent
|
|
if (color == "rgba(0, 0, 0, 0)")
|
|
return "transparent";
|
|
|
|
return color;
|
|
}
|
|
|
|
// parse string, returns Color
|
|
function parseColor(str) {
|
|
var result;
|
|
|
|
// Look for rgb(num,num,num)
|
|
if (result = /rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(str))
|
|
return new Color(parseInt(result[1], 10), parseInt(result[2], 10), parseInt(result[3], 10));
|
|
|
|
// Look for rgba(num,num,num,num)
|
|
if (result = /rgba\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(str))
|
|
return new Color(parseInt(result[1], 10), parseInt(result[2], 10), parseInt(result[3], 10), parseFloat(result[4]));
|
|
|
|
// Look for rgb(num%,num%,num%)
|
|
if (result = /rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(str))
|
|
return new Color(parseFloat(result[1])*2.55, parseFloat(result[2])*2.55, parseFloat(result[3])*2.55);
|
|
|
|
// Look for rgba(num%,num%,num%,num)
|
|
if (result = /rgba\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(str))
|
|
return new Color(parseFloat(result[1])*2.55, parseFloat(result[2])*2.55, parseFloat(result[3])*2.55, parseFloat(result[4]));
|
|
|
|
// Look for #a0b1c2
|
|
if (result = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(str))
|
|
return new Color(parseInt(result[1], 16), parseInt(result[2], 16), parseInt(result[3], 16));
|
|
|
|
// Look for #fff
|
|
if (result = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(str))
|
|
return new Color(parseInt(result[1]+result[1], 16), parseInt(result[2]+result[2], 16), parseInt(result[3]+result[3], 16));
|
|
|
|
// Otherwise, we're most likely dealing with a named color
|
|
var name = $.trim(str).toLowerCase();
|
|
if (name == "transparent")
|
|
return new Color(255, 255, 255, 0);
|
|
else {
|
|
result = lookupColors[name];
|
|
return new Color(result[0], result[1], result[2]);
|
|
}
|
|
}
|
|
|
|
})(jQuery);
|