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3413 lines
108 KiB
JavaScript
3413 lines
108 KiB
JavaScript
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/**
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*
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* THIS FILE WAS COPIED INTO PROMETHEUS FROM GRAFANA'S VENDORED FORK OF FLOT
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* (LIVING AT https://github.com/grafana/grafana/tree/master/public/vendor/flot),
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* WHICH CONTAINS FIXES FOR DISPLAYING NULL VALUES IN STACKED GRAPHS. THE ORIGINAL
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* FLOT CODE WAS LICENSED UNDER THE MIT LICENSE AS STATED BELOW. ADDITIONAL
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* CHANGES HAVE BEEN CONTRIBUTED TO THE GRAFANA FORK UNDER AN APACHE 2 LICENSE, SEE
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* https://github.com/grafana/grafana/blob/master/license.
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*
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*/
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/* eslint-disable prefer-spread */
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/* eslint-disable no-loop-func */
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/* eslint-disable @typescript-eslint/no-this-alias */
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/* eslint-disable no-redeclare */
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/* eslint-disable no-useless-escape */
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/* eslint-disable prefer-const */
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/* eslint-disable @typescript-eslint/explicit-function-return-type */
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/* eslint-disable @typescript-eslint/no-use-before-define */
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/* eslint-disable eqeqeq */
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/* eslint-disable no-var */
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/* Javascript plotting library for jQuery, version 0.8.3.
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Copyright (c) 2007-2014 IOLA and Ole Laursen.
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Licensed under the MIT license.
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*/
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// first an inline dependency, jquery.colorhelpers.js, we inline it here
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// for convenience
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/* Plugin for jQuery for working with colors.
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*
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* Version 1.1.
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*
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* Inspiration from jQuery color animation plugin by John Resig.
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*
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* Released under the MIT license by Ole Laursen, October 2009.
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*
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* Examples:
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*
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* $.color.parse("#fff").scale('rgb', 0.25).add('a', -0.5).toString()
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* var c = $.color.extract($("#mydiv"), 'background-color');
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* console.log(c.r, c.g, c.b, c.a);
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* $.color.make(100, 50, 25, 0.4).toString() // returns "rgba(100,50,25,0.4)"
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*
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* Note that .scale() and .add() return the same modified object
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* instead of making a new one.
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*
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* V. 1.1: Fix error handling so e.g. parsing an empty string does
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* produce a color rather than just crashing.
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*/
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(function($) {
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$.color = {};
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$.color.make = function(r, g, b, a) {
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var o = {};
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o.r = r || 0;
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o.g = g || 0;
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o.b = b || 0;
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o.a = a != null ? a : 1;
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o.add = function(c, d) {
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for (var i = 0; i < c.length; ++i) o[c.charAt(i)] += d;
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return o.normalize();
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};
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o.scale = function(c, f) {
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for (var i = 0; i < c.length; ++i) o[c.charAt(i)] *= f;
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return o.normalize();
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};
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o.toString = function() {
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if (o.a >= 1) {
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return 'rgb(' + [o.r, o.g, o.b].join(',') + ')';
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} else {
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return 'rgba(' + [o.r, o.g, o.b, o.a].join(',') + ')';
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}
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};
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o.normalize = function() {
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function clamp(min, value, max) {
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return value < min ? min : value > max ? max : value;
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}
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o.r = clamp(0, parseInt(o.r), 255);
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o.g = clamp(0, parseInt(o.g), 255);
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o.b = clamp(0, parseInt(o.b), 255);
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o.a = clamp(0, o.a, 1);
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return o;
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};
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o.clone = function() {
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return $.color.make(o.r, o.b, o.g, o.a);
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};
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return o.normalize();
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};
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$.color.extract = function(elem, css) {
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var c;
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do {
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c = elem.css(css).toLowerCase();
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if (c != '' && c != 'transparent') break;
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elem = elem.parent();
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} while (elem.length && !$.nodeName(elem.get(0), 'body'));
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if (c == 'rgba(0, 0, 0, 0)') c = 'transparent';
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return $.color.parse(c);
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};
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$.color.parse = function(str) {
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var res,
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m = $.color.make;
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if ((res = /rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(str)))
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return m(parseInt(res[1], 10), parseInt(res[2], 10), parseInt(res[3], 10));
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if ((res = /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)))
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return m(parseInt(res[1], 10), parseInt(res[2], 10), parseInt(res[3], 10), parseFloat(res[4]));
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if ((res = /rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(str)))
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return m(parseFloat(res[1]) * 2.55, parseFloat(res[2]) * 2.55, parseFloat(res[3]) * 2.55);
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if (
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(res = /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(
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str
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))
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)
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return m(parseFloat(res[1]) * 2.55, parseFloat(res[2]) * 2.55, parseFloat(res[3]) * 2.55, parseFloat(res[4]));
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if ((res = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(str)))
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return m(parseInt(res[1], 16), parseInt(res[2], 16), parseInt(res[3], 16));
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if ((res = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(str)))
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return m(parseInt(res[1] + res[1], 16), parseInt(res[2] + res[2], 16), parseInt(res[3] + res[3], 16));
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var name = $.trim(str).toLowerCase();
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if (name == 'transparent') return m(255, 255, 255, 0);
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else {
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res = lookupColors[name] || [0, 0, 0];
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return m(res[0], res[1], res[2]);
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}
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};
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var lookupColors = {
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aqua: [0, 255, 255],
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azure: [240, 255, 255],
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beige: [245, 245, 220],
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black: [0, 0, 0],
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blue: [0, 0, 255],
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brown: [165, 42, 42],
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cyan: [0, 255, 255],
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darkblue: [0, 0, 139],
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darkcyan: [0, 139, 139],
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darkgrey: [169, 169, 169],
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darkgreen: [0, 100, 0],
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darkkhaki: [189, 183, 107],
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darkmagenta: [139, 0, 139],
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darkolivegreen: [85, 107, 47],
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darkorange: [255, 140, 0],
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darkorchid: [153, 50, 204],
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darkred: [139, 0, 0],
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darksalmon: [233, 150, 122],
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darkviolet: [148, 0, 211],
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fuchsia: [255, 0, 255],
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gold: [255, 215, 0],
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green: [0, 128, 0],
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indigo: [75, 0, 130],
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khaki: [240, 230, 140],
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lightblue: [173, 216, 230],
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lightcyan: [224, 255, 255],
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lightgreen: [144, 238, 144],
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lightgrey: [211, 211, 211],
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lightpink: [255, 182, 193],
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lightyellow: [255, 255, 224],
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lime: [0, 255, 0],
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magenta: [255, 0, 255],
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maroon: [128, 0, 0],
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navy: [0, 0, 128],
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olive: [128, 128, 0],
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orange: [255, 165, 0],
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pink: [255, 192, 203],
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purple: [128, 0, 128],
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violet: [128, 0, 128],
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red: [255, 0, 0],
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silver: [192, 192, 192],
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white: [255, 255, 255],
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yellow: [255, 255, 0],
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};
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})(window.jQuery);
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// the actual Flot code
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(function($) {
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// Cache the prototype hasOwnProperty for faster access
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let hasOwnProperty = Object.prototype.hasOwnProperty;
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// A shim to provide 'detach' to jQuery versions prior to 1.4. Using a DOM
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// operation produces the same effect as detach, i.e. removing the element
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// without touching its jQuery data.
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// Do not merge this into Flot 0.9, since it requires jQuery 1.4.4+.
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if (!$.fn.detach) {
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$.fn.detach = function() {
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return this.each(function() {
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if (this.parentNode) {
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this.parentNode.removeChild(this);
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}
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});
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};
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}
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///////////////////////////////////////////////////////////////////////////
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// The Canvas object is a wrapper around an HTML5 <canvas> tag.
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//
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// @constructor
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// @param {string} cls List of classes to apply to the canvas.
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// @param {element} container Element onto which to append the canvas.
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//
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// Requiring a container is a little iffy, but unfortunately canvas
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// operations don't work unless the canvas is attached to the DOM.
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function Canvas(cls, container) {
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var element = container.children('.' + cls)[0];
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if (element == null) {
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element = document.createElement('canvas');
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element.className = cls;
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$(element)
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.css({ direction: 'ltr', position: 'absolute', left: 0, top: 0 })
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.appendTo(container);
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// If HTML5 Canvas isn't available, fall back to [Ex|Flash]canvas
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if (!element.getContext) {
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if (window.G_vmlCanvasManager) {
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element = window.G_vmlCanvasManager.initElement(element);
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} else {
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throw new Error(
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"Canvas is not available. If you're using IE with a fall-back such as Excanvas, then there's either a mistake in your conditional include, or the page has no DOCTYPE and is rendering in Quirks Mode."
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);
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}
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}
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}
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this.element = element;
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var context = (this.context = element.getContext('2d'));
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// Determine the screen's ratio of physical to device-independent
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// pixels. This is the ratio between the canvas width that the browser
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// advertises and the number of pixels actually present in that space.
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// The iPhone 4, for example, has a device-independent width of 320px,
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// but its screen is actually 640px wide. It therefore has a pixel
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// ratio of 2, while most normal devices have a ratio of 1.
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let devicePixelRatio = window.devicePixelRatio || 1,
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backingStoreRatio =
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context.webkitBackingStorePixelRatio ||
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context.mozBackingStorePixelRatio ||
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context.msBackingStorePixelRatio ||
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context.oBackingStorePixelRatio ||
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context.backingStorePixelRatio ||
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1;
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this.pixelRatio = devicePixelRatio / backingStoreRatio;
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// Size the canvas to match the internal dimensions of its container
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this.resize(container.width(), container.height());
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// Collection of HTML div layers for text overlaid onto the canvas
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this.textContainer = null;
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this.text = {};
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// Cache of text fragments and metrics, so we can avoid expensively
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// re-calculating them when the plot is re-rendered in a loop.
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this._textCache = {};
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this._textSizeCache = window.flotTextSizeCache = window.flotTextSizeCache || {};
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}
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// Resizes the canvas to the given dimensions.
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//
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// @param {number} width New width of the canvas, in pixels.
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// @param {number} width New height of the canvas, in pixels.
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Canvas.prototype.resize = function(width, height) {
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if (width <= 0 || height <= 0) {
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throw new Error('Invalid dimensions for plot, width = ' + width + ', height = ' + height);
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}
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let element = this.element,
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context = this.context,
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pixelRatio = this.pixelRatio;
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// Resize the canvas, increasing its density based on the display's
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// pixel ratio; basically giving it more pixels without increasing the
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// size of its element, to take advantage of the fact that retina
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// displays have that many more pixels in the same advertised space.
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// Resizing should reset the state (excanvas seems to be buggy though)
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if (this.width != width) {
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element.width = width * pixelRatio;
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element.style.width = width + 'px';
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this.width = width;
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}
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if (this.height != height) {
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element.height = height * pixelRatio;
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element.style.height = height + 'px';
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this.height = height;
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}
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// Save the context, so we can reset in case we get replotted. The
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// restore ensure that we're really back at the initial state, and
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// should be safe even if we haven't saved the initial state yet.
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context.restore();
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context.save();
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// Scale the coordinate space to match the display density; so even though we
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// may have twice as many pixels, we still want lines and other drawing to
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// appear at the same size; the extra pixels will just make them crisper.
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context.scale(pixelRatio, pixelRatio);
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};
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// Clears the entire canvas area, not including any overlaid HTML text
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Canvas.prototype.clear = function() {
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this.context.clearRect(0, 0, this.width, this.height);
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};
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// Finishes rendering the canvas, including managing the text overlay.
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||
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Canvas.prototype.render = function() {
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let cache = this._textCache;
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||
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// For each text layer, add elements marked as active that haven't
|
||
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// already been rendered, and remove those that are no longer active.
|
||
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for (let layerKey in cache) {
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if (hasOwnProperty.call(cache, layerKey)) {
|
||
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let layer = this.getTextLayer(layerKey),
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layerCache = cache[layerKey];
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||
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layer.hide();
|
||
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for (let styleKey in layerCache) {
|
||
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if (hasOwnProperty.call(layerCache, styleKey)) {
|
||
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let styleCache = layerCache[styleKey];
|
||
|
|
for (let key in styleCache) {
|
||
|
|
if (hasOwnProperty.call(styleCache, key)) {
|
||
|
|
let positions = styleCache[key].positions;
|
||
|
|
|
||
|
|
for (var i = 0, position; (position = positions[i]); i++) {
|
||
|
|
if (position.active) {
|
||
|
|
if (!position.rendered) {
|
||
|
|
layer.append(position.element);
|
||
|
|
position.rendered = true;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
positions.splice(i--, 1);
|
||
|
|
if (position.rendered) {
|
||
|
|
position.element.detach();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (positions.length == 0) {
|
||
|
|
delete styleCache[key];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
layer.show();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// Creates (if necessary) and returns the text overlay container.
|
||
|
|
//
|
||
|
|
// @param {string} classes String of space-separated CSS classes used to
|
||
|
|
// uniquely identify the text layer.
|
||
|
|
// @return {object} The jQuery-wrapped text-layer div.
|
||
|
|
|
||
|
|
Canvas.prototype.getTextLayer = function(classes) {
|
||
|
|
let layer = this.text[classes];
|
||
|
|
|
||
|
|
// Create the text layer if it doesn't exist
|
||
|
|
|
||
|
|
if (layer == null) {
|
||
|
|
// Create the text layer container, if it doesn't exist
|
||
|
|
|
||
|
|
if (this.textContainer == null) {
|
||
|
|
this.textContainer = $("<div class='flot-text flot-temp-elem'></div>")
|
||
|
|
.css({
|
||
|
|
position: 'absolute',
|
||
|
|
top: 0,
|
||
|
|
left: 0,
|
||
|
|
bottom: 0,
|
||
|
|
right: 0,
|
||
|
|
'font-size': 'smaller',
|
||
|
|
color: '#545454',
|
||
|
|
})
|
||
|
|
.insertAfter(this.element);
|
||
|
|
}
|
||
|
|
|
||
|
|
layer = this.text[classes] = $('<div></div>')
|
||
|
|
.addClass(classes)
|
||
|
|
.css({
|
||
|
|
position: 'absolute',
|
||
|
|
top: 0,
|
||
|
|
left: 0,
|
||
|
|
bottom: 0,
|
||
|
|
right: 0,
|
||
|
|
})
|
||
|
|
.appendTo(this.textContainer);
|
||
|
|
}
|
||
|
|
|
||
|
|
return layer;
|
||
|
|
};
|
||
|
|
|
||
|
|
// Creates (if necessary) and returns a text info object.
|
||
|
|
//
|
||
|
|
// The object looks like this:
|
||
|
|
//
|
||
|
|
// {
|
||
|
|
// width: Width of the text's wrapper div.
|
||
|
|
// height: Height of the text's wrapper div.
|
||
|
|
// element: The jQuery-wrapped HTML div containing the text.
|
||
|
|
// positions: Array of positions at which this text is drawn.
|
||
|
|
// }
|
||
|
|
//
|
||
|
|
// The positions array contains objects that look like this:
|
||
|
|
//
|
||
|
|
// {
|
||
|
|
// active: Flag indicating whether the text should be visible.
|
||
|
|
// rendered: Flag indicating whether the text is currently visible.
|
||
|
|
// element: The jQuery-wrapped HTML div containing the text.
|
||
|
|
// x: X coordinate at which to draw the text.
|
||
|
|
// y: Y coordinate at which to draw the text.
|
||
|
|
// }
|
||
|
|
//
|
||
|
|
// Each position after the first receives a clone of the original element.
|
||
|
|
//
|
||
|
|
// The idea is that that the width, height, and general 'identity' of the
|
||
|
|
// text is constant no matter where it is placed; the placements are a
|
||
|
|
// secondary property.
|
||
|
|
//
|
||
|
|
// Canvas maintains a cache of recently-used text info objects; getTextInfo
|
||
|
|
// either returns the cached element or creates a new entry.
|
||
|
|
//
|
||
|
|
// @param {string} layer A string of space-separated CSS classes uniquely
|
||
|
|
// identifying the layer containing this text.
|
||
|
|
// @param {string} text Text string to retrieve info for.
|
||
|
|
// @param {(string|object)=} font Either a string of space-separated CSS
|
||
|
|
// classes or a font-spec object, defining the text's font and style.
|
||
|
|
// @param {number=} angle Angle at which to rotate the text, in degrees.
|
||
|
|
// Angle is currently unused, it will be implemented in the future.
|
||
|
|
// @param {number=} width Maximum width of the text before it wraps.
|
||
|
|
// @return {object} a text info object.
|
||
|
|
|
||
|
|
Canvas.prototype.getTextInfo = function(layer, text, font, angle, width) {
|
||
|
|
let textStyle, layerCache, styleCache, info;
|
||
|
|
|
||
|
|
// Cast the value to a string, in case we were given a number or such
|
||
|
|
|
||
|
|
text = '' + text;
|
||
|
|
|
||
|
|
// If the font is a font-spec object, generate a CSS font definition
|
||
|
|
|
||
|
|
if (typeof font === 'object') {
|
||
|
|
textStyle =
|
||
|
|
font.style +
|
||
|
|
' ' +
|
||
|
|
font.variant +
|
||
|
|
' ' +
|
||
|
|
font.weight +
|
||
|
|
' ' +
|
||
|
|
font.size +
|
||
|
|
'px/' +
|
||
|
|
font.lineHeight +
|
||
|
|
'px ' +
|
||
|
|
font.family;
|
||
|
|
} else {
|
||
|
|
textStyle = font;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Retrieve (or create) the cache for the text's layer and styles
|
||
|
|
|
||
|
|
layerCache = this._textCache[layer];
|
||
|
|
|
||
|
|
if (layerCache == null) {
|
||
|
|
layerCache = this._textCache[layer] = {};
|
||
|
|
}
|
||
|
|
|
||
|
|
styleCache = layerCache[textStyle];
|
||
|
|
|
||
|
|
if (styleCache == null) {
|
||
|
|
styleCache = layerCache[textStyle] = {};
|
||
|
|
}
|
||
|
|
|
||
|
|
info = styleCache[text];
|
||
|
|
|
||
|
|
// If we can't find a matching element in our cache, create a new one
|
||
|
|
|
||
|
|
if (info == null) {
|
||
|
|
var element = $('<div></div>')
|
||
|
|
.html(text)
|
||
|
|
.css({
|
||
|
|
position: 'absolute',
|
||
|
|
'max-width': width,
|
||
|
|
top: -9999,
|
||
|
|
})
|
||
|
|
.appendTo(this.getTextLayer(layer));
|
||
|
|
|
||
|
|
if (typeof font === 'object') {
|
||
|
|
element.css({
|
||
|
|
font: textStyle,
|
||
|
|
color: font.color,
|
||
|
|
});
|
||
|
|
} else if (typeof font === 'string') {
|
||
|
|
element.addClass(font);
|
||
|
|
}
|
||
|
|
|
||
|
|
info = styleCache[text] = { element: element, positions: [] };
|
||
|
|
|
||
|
|
let size = this._textSizeCache[text];
|
||
|
|
if (size) {
|
||
|
|
info.width = size.width;
|
||
|
|
info.height = size.height;
|
||
|
|
} else {
|
||
|
|
info.width = element.outerWidth(true);
|
||
|
|
info.height = element.outerHeight(true);
|
||
|
|
this._textSizeCache[text] = { width: info.width, height: info.height };
|
||
|
|
}
|
||
|
|
element.detach();
|
||
|
|
}
|
||
|
|
|
||
|
|
return info;
|
||
|
|
};
|
||
|
|
|
||
|
|
// Adds a text string to the canvas text overlay.
|
||
|
|
//
|
||
|
|
// The text isn't drawn immediately; it is marked as rendering, which will
|
||
|
|
// result in its addition to the canvas on the next render pass.
|
||
|
|
//
|
||
|
|
// @param {string} layer A string of space-separated CSS classes uniquely
|
||
|
|
// identifying the layer containing this text.
|
||
|
|
// @param {number} x X coordinate at which to draw the text.
|
||
|
|
// @param {number} y Y coordinate at which to draw the text.
|
||
|
|
// @param {string} text Text string to draw.
|
||
|
|
// @param {(string|object)=} font Either a string of space-separated CSS
|
||
|
|
// classes or a font-spec object, defining the text's font and style.
|
||
|
|
// @param {number=} angle Angle at which to rotate the text, in degrees.
|
||
|
|
// Angle is currently unused, it will be implemented in the future.
|
||
|
|
// @param {number=} width Maximum width of the text before it wraps.
|
||
|
|
// @param {string=} halign Horizontal alignment of the text; either "left",
|
||
|
|
// "center" or "right".
|
||
|
|
// @param {string=} valign Vertical alignment of the text; either "top",
|
||
|
|
// "middle" or "bottom".
|
||
|
|
|
||
|
|
Canvas.prototype.addText = function(layer, x, y, text, font, angle, width, halign, valign) {
|
||
|
|
let info = this.getTextInfo(layer, text, font, angle, width),
|
||
|
|
positions = info.positions;
|
||
|
|
|
||
|
|
// Tweak the div's position to match the text's alignment
|
||
|
|
|
||
|
|
if (halign == 'center') {
|
||
|
|
x -= info.width / 2;
|
||
|
|
} else if (halign == 'right') {
|
||
|
|
x -= info.width;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (valign == 'middle') {
|
||
|
|
y -= info.height / 2;
|
||
|
|
} else if (valign == 'bottom') {
|
||
|
|
y -= info.height;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Determine whether this text already exists at this position.
|
||
|
|
// If so, mark it for inclusion in the next render pass.
|
||
|
|
|
||
|
|
for (var i = 0, position; (position = positions[i]); i++) {
|
||
|
|
if (position.x == x && position.y == y) {
|
||
|
|
position.active = true;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// If the text doesn't exist at this position, create a new entry
|
||
|
|
|
||
|
|
// For the very first position we'll re-use the original element,
|
||
|
|
// while for subsequent ones we'll clone it.
|
||
|
|
|
||
|
|
position = {
|
||
|
|
active: true,
|
||
|
|
rendered: false,
|
||
|
|
element: positions.length ? info.element.clone() : info.element,
|
||
|
|
x: x,
|
||
|
|
y: y,
|
||
|
|
};
|
||
|
|
|
||
|
|
positions.push(position);
|
||
|
|
|
||
|
|
// Move the element to its final position within the container
|
||
|
|
|
||
|
|
position.element.css({
|
||
|
|
top: Math.round(y),
|
||
|
|
left: Math.round(x),
|
||
|
|
'text-align': halign, // In case the text wraps
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
// Removes one or more text strings from the canvas text overlay.
|
||
|
|
//
|
||
|
|
// If no parameters are given, all text within the layer is removed.
|
||
|
|
//
|
||
|
|
// Note that the text is not immediately removed; it is simply marked as
|
||
|
|
// inactive, which will result in its removal on the next render pass.
|
||
|
|
// This avoids the performance penalty for 'clear and redraw' behavior,
|
||
|
|
// where we potentially get rid of all text on a layer, but will likely
|
||
|
|
// add back most or all of it later, as when redrawing axes, for example.
|
||
|
|
//
|
||
|
|
// @param {string} layer A string of space-separated CSS classes uniquely
|
||
|
|
// identifying the layer containing this text.
|
||
|
|
// @param {number=} x X coordinate of the text.
|
||
|
|
// @param {number=} y Y coordinate of the text.
|
||
|
|
// @param {string=} text Text string to remove.
|
||
|
|
// @param {(string|object)=} font Either a string of space-separated CSS
|
||
|
|
// classes or a font-spec object, defining the text's font and style.
|
||
|
|
// @param {number=} angle Angle at which the text is rotated, in degrees.
|
||
|
|
// Angle is currently unused, it will be implemented in the future.
|
||
|
|
|
||
|
|
Canvas.prototype.removeText = function(layer, x, y, text, font, angle) {
|
||
|
|
if (text == null) {
|
||
|
|
let layerCache = this._textCache[layer];
|
||
|
|
if (layerCache != null) {
|
||
|
|
for (let styleKey in layerCache) {
|
||
|
|
if (hasOwnProperty.call(layerCache, styleKey)) {
|
||
|
|
let styleCache = layerCache[styleKey];
|
||
|
|
for (let key in styleCache) {
|
||
|
|
if (hasOwnProperty.call(styleCache, key)) {
|
||
|
|
var positions = styleCache[key].positions;
|
||
|
|
for (var i = 0, position; (position = positions[i]); i++) {
|
||
|
|
position.active = false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
var positions = this.getTextInfo(layer, text, font, angle).positions;
|
||
|
|
for (var i = 0, position; (position = positions[i]); i++) {
|
||
|
|
if (position.x == x && position.y == y) {
|
||
|
|
position.active = false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
///////////////////////////////////////////////////////////////////////////
|
||
|
|
// The top-level container for the entire plot.
|
||
|
|
|
||
|
|
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", ... }
|
||
|
|
|
||
|
|
let 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
|
||
|
|
sorted: null, // default to no legend sorting
|
||
|
|
},
|
||
|
|
xaxis: {
|
||
|
|
show: null, // null = auto-detect, true = always, false = never
|
||
|
|
position: 'bottom', // or "top"
|
||
|
|
mode: null, // null or "time"
|
||
|
|
font: null, // null (derived from CSS in placeholder) or object like { size: 11, lineHeight: 13, style: "italic", weight: "bold", family: "sans-serif", variant: "small-caps" }
|
||
|
|
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
|
||
|
|
tickDecimals: null, // no. of decimals, null means auto
|
||
|
|
tickSize: null, // number or [number, "unit"]
|
||
|
|
minTickSize: null, // number or [number, "unit"]
|
||
|
|
},
|
||
|
|
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,
|
||
|
|
// Omit 'zero', so we can later default its value to
|
||
|
|
// match that of the 'fill' option.
|
||
|
|
},
|
||
|
|
bars: {
|
||
|
|
show: false,
|
||
|
|
lineWidth: 2, // in pixels
|
||
|
|
barWidth: 1, // in units of the x axis
|
||
|
|
fill: true,
|
||
|
|
fillColor: null,
|
||
|
|
align: 'left', // "left", "right", or "center"
|
||
|
|
horizontal: false,
|
||
|
|
zero: true,
|
||
|
|
},
|
||
|
|
shadowSize: 3,
|
||
|
|
highlightColor: null,
|
||
|
|
},
|
||
|
|
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)"
|
||
|
|
margin: 0, // distance from the canvas edge to the grid
|
||
|
|
labelMargin: 5, // in pixels
|
||
|
|
eventSectionHeight: 0, // space for event section
|
||
|
|
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
|
||
|
|
},
|
||
|
|
interaction: {
|
||
|
|
redrawOverlayInterval: 1000 / 60, // time between updates, -1 means in same flow
|
||
|
|
},
|
||
|
|
hooks: {},
|
||
|
|
},
|
||
|
|
surface = 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 },
|
||
|
|
plotWidth = 0,
|
||
|
|
plotHeight = 0,
|
||
|
|
hooks = {
|
||
|
|
processOptions: [],
|
||
|
|
processRawData: [],
|
||
|
|
processDatapoints: [],
|
||
|
|
processOffset: [],
|
||
|
|
processRange: [],
|
||
|
|
drawBackground: [],
|
||
|
|
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 surface.element;
|
||
|
|
};
|
||
|
|
plot.getPlotOffset = function() {
|
||
|
|
return plotOffset;
|
||
|
|
};
|
||
|
|
plot.width = function() {
|
||
|
|
return plotWidth;
|
||
|
|
};
|
||
|
|
plot.height = function() {
|
||
|
|
return plotHeight;
|
||
|
|
};
|
||
|
|
plot.offset = function() {
|
||
|
|
let o = eventHolder.offset();
|
||
|
|
o.left += plotOffset.left;
|
||
|
|
o.top += plotOffset.top;
|
||
|
|
return o;
|
||
|
|
};
|
||
|
|
plot.getData = function() {
|
||
|
|
return series;
|
||
|
|
};
|
||
|
|
plot.getAxes = function() {
|
||
|
|
var res = {};
|
||
|
|
$.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, 10),
|
||
|
|
top: parseInt(yaxes[axisNumber(point, 'y') - 1].p2c(+point.y) + plotOffset.top, 10),
|
||
|
|
};
|
||
|
|
};
|
||
|
|
plot.shutdown = shutdown;
|
||
|
|
plot.destroy = function() {
|
||
|
|
shutdown();
|
||
|
|
placeholder.removeData('plot').empty();
|
||
|
|
|
||
|
|
series = [];
|
||
|
|
options = null;
|
||
|
|
surface = null;
|
||
|
|
overlay = null;
|
||
|
|
eventHolder = null;
|
||
|
|
ctx = null;
|
||
|
|
octx = null;
|
||
|
|
xaxes = [];
|
||
|
|
yaxes = [];
|
||
|
|
hooks = null;
|
||
|
|
highlights = [];
|
||
|
|
plot = null;
|
||
|
|
};
|
||
|
|
plot.resize = function() {
|
||
|
|
let width = placeholder.width(),
|
||
|
|
height = placeholder.height();
|
||
|
|
surface.resize(width, height);
|
||
|
|
overlay.resize(width, height);
|
||
|
|
};
|
||
|
|
|
||
|
|
// 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() {
|
||
|
|
// References to key classes, allowing plugins to modify them
|
||
|
|
|
||
|
|
let classes = {
|
||
|
|
Canvas: Canvas,
|
||
|
|
};
|
||
|
|
|
||
|
|
for (let i = 0; i < plugins.length; ++i) {
|
||
|
|
let p = plugins[i];
|
||
|
|
p.init(plot, classes);
|
||
|
|
if (p.options) $.extend(true, options, p.options);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseOptions(opts) {
|
||
|
|
$.extend(true, options, opts);
|
||
|
|
|
||
|
|
// $.extend merges arrays, rather than replacing them. When less
|
||
|
|
// colors are provided than the size of the default palette, we
|
||
|
|
// end up with those colors plus the remaining defaults, which is
|
||
|
|
// not expected behavior; avoid it by replacing them here.
|
||
|
|
|
||
|
|
if (opts && opts.colors) {
|
||
|
|
options.colors = opts.colors;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (options.xaxis.color == null)
|
||
|
|
options.xaxis.color = $.color
|
||
|
|
.parse(options.grid.color)
|
||
|
|
.scale('a', 0.22)
|
||
|
|
.toString();
|
||
|
|
if (options.yaxis.color == null)
|
||
|
|
options.yaxis.color = $.color
|
||
|
|
.parse(options.grid.color)
|
||
|
|
.scale('a', 0.22)
|
||
|
|
.toString();
|
||
|
|
|
||
|
|
if (options.xaxis.tickColor == null)
|
||
|
|
// grid.tickColor for back-compatibility
|
||
|
|
options.xaxis.tickColor = options.grid.tickColor || options.xaxis.color;
|
||
|
|
if (options.yaxis.tickColor == null)
|
||
|
|
// grid.tickColor for back-compatibility
|
||
|
|
options.yaxis.tickColor = options.grid.tickColor || options.yaxis.color;
|
||
|
|
|
||
|
|
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 for axis options, including any unspecified
|
||
|
|
// font-spec fields, if a font-spec was provided.
|
||
|
|
|
||
|
|
// If no x/y axis options were provided, create one of each anyway,
|
||
|
|
// since the rest of the code assumes that they exist.
|
||
|
|
|
||
|
|
var i,
|
||
|
|
axisOptions,
|
||
|
|
axisCount,
|
||
|
|
fontSize = placeholder.css('font-size'),
|
||
|
|
fontSizeDefault = fontSize ? +fontSize.replace('px', '') : 13,
|
||
|
|
fontDefaults = {
|
||
|
|
style: placeholder.css('font-style'),
|
||
|
|
size: Math.round(0.8 * fontSizeDefault),
|
||
|
|
variant: placeholder.css('font-variant'),
|
||
|
|
weight: placeholder.css('font-weight'),
|
||
|
|
family: placeholder.css('font-family'),
|
||
|
|
};
|
||
|
|
|
||
|
|
axisCount = options.xaxes.length || 1;
|
||
|
|
for (i = 0; i < axisCount; ++i) {
|
||
|
|
axisOptions = options.xaxes[i];
|
||
|
|
if (axisOptions && !axisOptions.tickColor) {
|
||
|
|
axisOptions.tickColor = axisOptions.color;
|
||
|
|
}
|
||
|
|
|
||
|
|
axisOptions = $.extend(true, {}, options.xaxis, axisOptions);
|
||
|
|
options.xaxes[i] = axisOptions;
|
||
|
|
|
||
|
|
if (axisOptions.font) {
|
||
|
|
axisOptions.font = $.extend({}, fontDefaults, axisOptions.font);
|
||
|
|
if (!axisOptions.font.color) {
|
||
|
|
axisOptions.font.color = axisOptions.color;
|
||
|
|
}
|
||
|
|
if (!axisOptions.font.lineHeight) {
|
||
|
|
axisOptions.font.lineHeight = Math.round(axisOptions.font.size * 1.15);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
axisCount = options.yaxes.length || 1;
|
||
|
|
for (i = 0; i < axisCount; ++i) {
|
||
|
|
axisOptions = options.yaxes[i];
|
||
|
|
if (axisOptions && !axisOptions.tickColor) {
|
||
|
|
axisOptions.tickColor = axisOptions.color;
|
||
|
|
}
|
||
|
|
|
||
|
|
axisOptions = $.extend(true, {}, options.yaxis, axisOptions);
|
||
|
|
options.yaxes[i] = axisOptions;
|
||
|
|
|
||
|
|
if (axisOptions.font) {
|
||
|
|
axisOptions.font = $.extend({}, fontDefaults, axisOptions.font);
|
||
|
|
if (!axisOptions.font.color) {
|
||
|
|
axisOptions.font.color = axisOptions.color;
|
||
|
|
}
|
||
|
|
if (!axisOptions.font.lineHeight) {
|
||
|
|
axisOptions.font.lineHeight = Math.round(axisOptions.font.size * 1.15);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// 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';
|
||
|
|
// Override the inherit to allow the axis to auto-scale
|
||
|
|
if (options.x2axis.min == null) {
|
||
|
|
options.xaxes[1].min = null;
|
||
|
|
}
|
||
|
|
if (options.x2axis.max == null) {
|
||
|
|
options.xaxes[1].max = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (options.y2axis) {
|
||
|
|
options.yaxes[1] = $.extend(true, {}, options.yaxis, options.y2axis);
|
||
|
|
options.yaxes[1].position = 'right';
|
||
|
|
// Override the inherit to allow the axis to auto-scale
|
||
|
|
if (options.y2axis.min == null) {
|
||
|
|
options.yaxes[1].min = null;
|
||
|
|
}
|
||
|
|
if (options.y2axis.max == null) {
|
||
|
|
options.yaxes[1].max = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
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;
|
||
|
|
if (options.highlightColor != null) options.series.highlightColor = options.highlightColor;
|
||
|
|
|
||
|
|
// 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) {
|
||
|
|
let res = [];
|
||
|
|
for (let i = 0; i < d.length; ++i) {
|
||
|
|
let 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) res['x' + axis.n] = axis.c2p(pos.left);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < yaxes.length; ++i) {
|
||
|
|
axis = yaxes[i];
|
||
|
|
if (axis) 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 neededColors = series.length,
|
||
|
|
maxIndex = -1,
|
||
|
|
i;
|
||
|
|
|
||
|
|
// Subtract the number of series that already have fixed colors or
|
||
|
|
// color indexes from the number that we still need to generate.
|
||
|
|
|
||
|
|
for (i = 0; i < series.length; ++i) {
|
||
|
|
let sc = series[i].color;
|
||
|
|
if (sc != null) {
|
||
|
|
neededColors--;
|
||
|
|
if (typeof sc == 'number' && sc > maxIndex) {
|
||
|
|
maxIndex = sc;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// If any of the series have fixed color indexes, then we need to
|
||
|
|
// generate at least as many colors as the highest index.
|
||
|
|
|
||
|
|
if (neededColors <= maxIndex) {
|
||
|
|
neededColors = maxIndex + 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Generate all the colors, using first the option colors and then
|
||
|
|
// variations on those colors once they're exhausted.
|
||
|
|
|
||
|
|
var c,
|
||
|
|
colors = [],
|
||
|
|
colorPool = options.colors,
|
||
|
|
colorPoolSize = colorPool.length,
|
||
|
|
variation = 0;
|
||
|
|
|
||
|
|
for (i = 0; i < neededColors; i++) {
|
||
|
|
c = $.color.parse(colorPool[i % colorPoolSize] || '#666');
|
||
|
|
|
||
|
|
// Each time we exhaust the colors in the pool we adjust
|
||
|
|
// a scaling factor used to produce more variations on
|
||
|
|
// those colors. The factor alternates negative/positive
|
||
|
|
// to produce lighter/darker colors.
|
||
|
|
|
||
|
|
// Reset the variation after every few cycles, or else
|
||
|
|
// it will end up producing only white or black colors.
|
||
|
|
|
||
|
|
if (i % colorPoolSize == 0 && i) {
|
||
|
|
if (variation >= 0) {
|
||
|
|
if (variation < 0.5) {
|
||
|
|
variation = -variation - 0.2;
|
||
|
|
} else variation = 0;
|
||
|
|
} else variation = -variation;
|
||
|
|
}
|
||
|
|
|
||
|
|
colors[i] = c.scale('rgb', 1 + variation);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Finalize the series options, filling in their colors
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
// If nothing was provided for lines.zero, default it to match
|
||
|
|
// lines.fill, since areas by default should extend to zero.
|
||
|
|
|
||
|
|
if (s.lines.zero == null) {
|
||
|
|
s.lines.zero = !!s.lines.fill;
|
||
|
|
}
|
||
|
|
|
||
|
|
// setup axes
|
||
|
|
s.xaxis = getOrCreateAxis(xaxes, axisNumber(s, 'x'));
|
||
|
|
s.yaxis = getOrCreateAxis(yaxes, axisNumber(s, 'y'));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function processData() {
|
||
|
|
let topSentry = Number.POSITIVE_INFINITY,
|
||
|
|
bottomSentry = Number.NEGATIVE_INFINITY,
|
||
|
|
fakeInfinity = Number.MAX_VALUE,
|
||
|
|
i,
|
||
|
|
j,
|
||
|
|
k,
|
||
|
|
m,
|
||
|
|
s,
|
||
|
|
points,
|
||
|
|
ps,
|
||
|
|
val,
|
||
|
|
f,
|
||
|
|
p,
|
||
|
|
data,
|
||
|
|
format;
|
||
|
|
|
||
|
|
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];
|
||
|
|
|
||
|
|
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.stack || s.bars.show || (s.lines.show && s.lines.fill)) {
|
||
|
|
let autoscale = !!((s.bars.show && s.bars.zero) || (s.lines.show && s.lines.zero));
|
||
|
|
format.push({ y: true, number: true, required: false, defaultValue: 0, autoscale: autoscale });
|
||
|
|
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;
|
||
|
|
|
||
|
|
let 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];
|
||
|
|
|
||
|
|
let 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.autoscale !== false) {
|
||
|
|
if (f.x) {
|
||
|
|
updateAxis(s.xaxis, val, val);
|
||
|
|
}
|
||
|
|
if (f.y) {
|
||
|
|
updateAxis(s.yaxis, val, val);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
points[k + m] = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (insertSteps && k > 0 && (!nullify || points[k - ps] != null)) {
|
||
|
|
// 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] || 0;
|
||
|
|
|
||
|
|
// if series has null values, let's give the last !null value a nice step
|
||
|
|
if (nullify) points[k] = p[0];
|
||
|
|
|
||
|
|
// 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];
|
||
|
|
points = s.datapoints.points;
|
||
|
|
ps = s.datapoints.pointsize;
|
||
|
|
|
||
|
|
// grafana
|
||
|
|
if (s.transform === 'negative-Y') {
|
||
|
|
for (j = 0; j < points.length; j += ps) {
|
||
|
|
if (points[j] == null) continue;
|
||
|
|
|
||
|
|
val = points[j + 1];
|
||
|
|
points[j + 1] = -val;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
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;
|
||
|
|
format = s.datapoints.format;
|
||
|
|
|
||
|
|
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 || f.autoscale === false || 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;
|
||
|
|
|
||
|
|
switch (s.bars.align) {
|
||
|
|
case 'left':
|
||
|
|
delta = 0;
|
||
|
|
break;
|
||
|
|
case 'right':
|
||
|
|
delta = -s.bars.barWidth;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
delta = -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 setupCanvases() {
|
||
|
|
// Make sure the placeholder is clear of everything except canvases
|
||
|
|
// from a previous plot in this container that we'll try to re-use.
|
||
|
|
|
||
|
|
placeholder.find('.flot-temp-elem').remove();
|
||
|
|
|
||
|
|
if (placeholder.css('position') == 'static') placeholder.css('position', 'relative'); // for positioning labels and overlay
|
||
|
|
|
||
|
|
surface = new Canvas('flot-base', placeholder);
|
||
|
|
overlay = new Canvas('flot-overlay', placeholder); // overlay canvas for interactive features
|
||
|
|
|
||
|
|
ctx = surface.context;
|
||
|
|
octx = overlay.context;
|
||
|
|
|
||
|
|
// define which element we're listening for events on
|
||
|
|
eventHolder = $(overlay.element).unbind();
|
||
|
|
|
||
|
|
// If we're re-using a plot object, shut down the old one
|
||
|
|
|
||
|
|
var existing = placeholder.data('plot');
|
||
|
|
|
||
|
|
if (existing) {
|
||
|
|
existing.shutdown();
|
||
|
|
overlay.clear();
|
||
|
|
}
|
||
|
|
|
||
|
|
// save in case we get replotted
|
||
|
|
placeholder.data('plot', plot);
|
||
|
|
}
|
||
|
|
|
||
|
|
function bindEvents() {
|
||
|
|
// bind events
|
||
|
|
if (options.grid.hoverable) {
|
||
|
|
eventHolder.mousemove(onMouseMove);
|
||
|
|
|
||
|
|
// Use bind, rather than .mouseleave, because we officially
|
||
|
|
// still support jQuery 1.2.6, which doesn't define a shortcut
|
||
|
|
// for mouseenter or mouseleave. This was a bug/oversight that
|
||
|
|
// was fixed somewhere around 1.3.x. We can return to using
|
||
|
|
// .mouseleave when we drop support for 1.2.6.
|
||
|
|
|
||
|
|
eventHolder.bind('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) {
|
||
|
|
let opts = axis.options,
|
||
|
|
ticks = axis.ticks || [],
|
||
|
|
labelWidth = opts.labelWidth || 0,
|
||
|
|
labelHeight = opts.labelHeight || 0,
|
||
|
|
maxWidth = labelWidth || (axis.direction == 'x' ? Math.floor(surface.width / (ticks.length || 1)) : null),
|
||
|
|
legacyStyles = axis.direction + 'Axis ' + axis.direction + axis.n + 'Axis',
|
||
|
|
layer = 'flot-' + axis.direction + '-axis flot-' + axis.direction + axis.n + '-axis ' + legacyStyles,
|
||
|
|
font = opts.font || 'flot-tick-label tickLabel';
|
||
|
|
|
||
|
|
for (let i = 0; i < ticks.length; ++i) {
|
||
|
|
let t = ticks[i];
|
||
|
|
|
||
|
|
if (!t.label) continue;
|
||
|
|
|
||
|
|
let info = surface.getTextInfo(layer, t.label, font, null, maxWidth);
|
||
|
|
|
||
|
|
/// Grafana fix, add +1 to label width
|
||
|
|
labelWidth = Math.max(labelWidth, info.width + 1);
|
||
|
|
labelHeight = Math.max(labelHeight, info.height);
|
||
|
|
}
|
||
|
|
|
||
|
|
axis.labelWidth = opts.labelWidth || labelWidth;
|
||
|
|
axis.labelHeight = opts.labelHeight || labelHeight;
|
||
|
|
}
|
||
|
|
|
||
|
|
function allocateAxisBoxFirstPhase(axis) {
|
||
|
|
// find the bounding box of the axis by looking at label
|
||
|
|
// widths/heights and ticks, make room by diminishing the
|
||
|
|
// plotOffset; this first phase only looks at one
|
||
|
|
// dimension per axis, the other dimension depends on the
|
||
|
|
// other axes so will have to wait
|
||
|
|
|
||
|
|
let lw = axis.labelWidth,
|
||
|
|
lh = axis.labelHeight,
|
||
|
|
pos = axis.options.position,
|
||
|
|
isXAxis = axis.direction === 'x',
|
||
|
|
tickLength = axis.options.tickLength,
|
||
|
|
axisMargin = options.grid.axisMargin,
|
||
|
|
padding = options.grid.labelMargin,
|
||
|
|
eventSectionPadding = options.grid.eventSectionHeight,
|
||
|
|
innermost = true,
|
||
|
|
outermost = true,
|
||
|
|
first = true,
|
||
|
|
found = false;
|
||
|
|
|
||
|
|
// Determine the axis's position in its direction and on its side
|
||
|
|
|
||
|
|
$.each(isXAxis ? xaxes : yaxes, function(i, a) {
|
||
|
|
if (a && (a.show || a.reserveSpace)) {
|
||
|
|
if (a === axis) {
|
||
|
|
found = true;
|
||
|
|
} else if (a.options.position === pos) {
|
||
|
|
if (found) {
|
||
|
|
outermost = false;
|
||
|
|
} else {
|
||
|
|
innermost = false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!found) {
|
||
|
|
first = false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
// The outermost axis on each side has no margin
|
||
|
|
|
||
|
|
if (outermost) {
|
||
|
|
axisMargin = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// The ticks for the first axis in each direction stretch across
|
||
|
|
|
||
|
|
if (tickLength == null) {
|
||
|
|
tickLength = first ? 'full' : 5;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!isNaN(+tickLength)) padding += +tickLength;
|
||
|
|
|
||
|
|
if (isXAxis) {
|
||
|
|
// Add space for event section
|
||
|
|
lh += padding;
|
||
|
|
lh += eventSectionPadding;
|
||
|
|
|
||
|
|
if (pos == 'bottom') {
|
||
|
|
plotOffset.bottom += lh + axisMargin;
|
||
|
|
axis.box = { top: surface.height - 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: surface.width - plotOffset.right, width: lw };
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// save for future reference
|
||
|
|
axis.position = pos;
|
||
|
|
axis.tickLength = tickLength;
|
||
|
|
axis.box.padding = padding;
|
||
|
|
axis.box.eventSectionPadding = eventSectionPadding;
|
||
|
|
axis.innermost = innermost;
|
||
|
|
}
|
||
|
|
|
||
|
|
function allocateAxisBoxSecondPhase(axis) {
|
||
|
|
// now that all axis boxes have been placed in one
|
||
|
|
// dimension, we can set the remaining dimension coordinates
|
||
|
|
if (axis.direction == 'x') {
|
||
|
|
axis.box.left = plotOffset.left - axis.labelWidth / 2;
|
||
|
|
axis.box.width = surface.width - plotOffset.left - plotOffset.right + axis.labelWidth;
|
||
|
|
} else {
|
||
|
|
axis.box.top = plotOffset.top - axis.labelHeight / 2;
|
||
|
|
axis.box.height = surface.height - plotOffset.bottom - plotOffset.top + axis.labelHeight;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function adjustLayoutForThingsStickingOut() {
|
||
|
|
// possibly adjust plot offset to ensure everything stays
|
||
|
|
// inside the canvas and isn't clipped off
|
||
|
|
|
||
|
|
let minMargin = options.grid.minBorderMargin,
|
||
|
|
i;
|
||
|
|
|
||
|
|
// check stuff from the plot (FIXME: this should just read
|
||
|
|
// a value from the series, otherwise it's impossible to
|
||
|
|
// customize)
|
||
|
|
if (minMargin == null) {
|
||
|
|
minMargin = 0;
|
||
|
|
for (i = 0; i < series.length; ++i)
|
||
|
|
minMargin = Math.max(minMargin, 2 * (series[i].points.radius + series[i].points.lineWidth / 2));
|
||
|
|
}
|
||
|
|
|
||
|
|
let margins = {
|
||
|
|
left: minMargin,
|
||
|
|
right: minMargin,
|
||
|
|
top: minMargin,
|
||
|
|
bottom: minMargin,
|
||
|
|
};
|
||
|
|
|
||
|
|
// check axis labels, note we don't check the actual
|
||
|
|
// labels but instead use the overall width/height to not
|
||
|
|
// jump as much around with replots
|
||
|
|
$.each(allAxes(), function(_, axis) {
|
||
|
|
if (axis.reserveSpace && axis.ticks && axis.ticks.length) {
|
||
|
|
if (axis.direction === 'x') {
|
||
|
|
margins.left = Math.max(margins.left, axis.labelWidth / 2);
|
||
|
|
margins.right = Math.max(margins.right, axis.labelWidth / 2);
|
||
|
|
} else {
|
||
|
|
margins.bottom = Math.max(margins.bottom, axis.labelHeight / 2);
|
||
|
|
margins.top = Math.max(margins.top, axis.labelHeight / 2);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
plotOffset.left = Math.ceil(Math.max(margins.left, plotOffset.left));
|
||
|
|
plotOffset.right = Math.ceil(Math.max(margins.right, plotOffset.right));
|
||
|
|
plotOffset.top = Math.ceil(Math.max(margins.top, plotOffset.top));
|
||
|
|
plotOffset.bottom = Math.ceil(Math.max(margins.bottom, plotOffset.bottom));
|
||
|
|
}
|
||
|
|
|
||
|
|
function setupGrid() {
|
||
|
|
var i,
|
||
|
|
axes = allAxes(),
|
||
|
|
showGrid = options.grid.show;
|
||
|
|
|
||
|
|
// Initialize the plot's offset from the edge of the canvas
|
||
|
|
|
||
|
|
for (var a in plotOffset) {
|
||
|
|
let margin = options.grid.margin || 0;
|
||
|
|
plotOffset[a] = typeof margin == 'number' ? margin : margin[a] || 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
executeHooks(hooks.processOffset, [plotOffset]);
|
||
|
|
|
||
|
|
// If the grid is visible, add its border width to the offset
|
||
|
|
|
||
|
|
for (var a in plotOffset) {
|
||
|
|
if (typeof options.grid.borderWidth == 'object') {
|
||
|
|
plotOffset[a] += showGrid ? options.grid.borderWidth[a] : 0;
|
||
|
|
} else {
|
||
|
|
plotOffset[a] += showGrid ? options.grid.borderWidth : 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$.each(axes, function(_, axis) {
|
||
|
|
let axisOpts = axis.options;
|
||
|
|
axis.show = axisOpts.show == null ? axis.used : axisOpts.show;
|
||
|
|
axis.reserveSpace = axisOpts.reserveSpace == null ? axis.show : axisOpts.reserveSpace;
|
||
|
|
setRange(axis);
|
||
|
|
});
|
||
|
|
|
||
|
|
executeHooks(hooks.processRange, []);
|
||
|
|
|
||
|
|
if (showGrid) {
|
||
|
|
var allocatedAxes = $.grep(axes, function(axis) {
|
||
|
|
return axis.show || axis.reserveSpace;
|
||
|
|
});
|
||
|
|
|
||
|
|
let snaped = false;
|
||
|
|
for (var i = 0; i < 2; i++) {
|
||
|
|
$.each(allocatedAxes, function(_, axis) {
|
||
|
|
// make the ticks
|
||
|
|
setupTickGeneration(axis);
|
||
|
|
setTicks(axis);
|
||
|
|
snaped = snapRangeToTicks(axis, axis.ticks) || snaped;
|
||
|
|
// find labelWidth/Height for axis
|
||
|
|
measureTickLabels(axis);
|
||
|
|
});
|
||
|
|
|
||
|
|
if (snaped && hooks.processRange.length > 0) {
|
||
|
|
executeHooks(hooks.processRange, []);
|
||
|
|
snaped = false;
|
||
|
|
} else {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// with all dimensions calculated, we can compute the
|
||
|
|
// axis bounding 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
|
||
|
|
adjustLayoutForThingsStickingOut();
|
||
|
|
|
||
|
|
$.each(allocatedAxes, function(_, axis) {
|
||
|
|
allocateAxisBoxSecondPhase(axis);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
plotWidth = surface.width - plotOffset.left - plotOffset.right;
|
||
|
|
plotHeight = surface.height - plotOffset.bottom - plotOffset.top;
|
||
|
|
|
||
|
|
// now we got the proper plot dimensions, we can compute the scaling
|
||
|
|
$.each(axes, function(_, axis) {
|
||
|
|
setTransformationHelpers(axis);
|
||
|
|
});
|
||
|
|
|
||
|
|
if (showGrid) {
|
||
|
|
drawAxisLabels();
|
||
|
|
}
|
||
|
|
|
||
|
|
insertLegend();
|
||
|
|
}
|
||
|
|
|
||
|
|
function setRange(axis) {
|
||
|
|
let 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) {
|
||
|
|
// Grafana fix: wide Y min and max using increased wideFactor
|
||
|
|
// when all series values are the same
|
||
|
|
let wideFactor = 0.25;
|
||
|
|
let widen = Math.abs(max == 0 ? 1 : max * wideFactor);
|
||
|
|
|
||
|
|
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
|
||
|
|
let 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) {
|
||
|
|
let opts = axis.options;
|
||
|
|
|
||
|
|
// estimate number of ticks
|
||
|
|
let noTicks;
|
||
|
|
if (typeof opts.ticks == 'number' && opts.ticks > 0) noTicks = opts.ticks;
|
||
|
|
// heuristic based on the model a*sqrt(x) fitted to
|
||
|
|
// some data points that seemed reasonable
|
||
|
|
else noTicks = 0.3 * Math.sqrt(axis.direction == 'x' ? surface.width : surface.height);
|
||
|
|
|
||
|
|
let delta = (axis.max - axis.min) / noTicks,
|
||
|
|
dec = -Math.floor(Math.log(delta) / Math.LN10),
|
||
|
|
maxDec = opts.tickDecimals;
|
||
|
|
|
||
|
|
if (maxDec != null && dec > maxDec) {
|
||
|
|
dec = maxDec;
|
||
|
|
}
|
||
|
|
|
||
|
|
let magn = Math.pow(10, -dec),
|
||
|
|
norm = delta / magn, // norm is between 1.0 and 10.0
|
||
|
|
size;
|
||
|
|
|
||
|
|
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.delta = delta;
|
||
|
|
axis.tickDecimals = Math.max(0, maxDec != null ? maxDec : dec);
|
||
|
|
axis.tickSize = opts.tickSize || size;
|
||
|
|
|
||
|
|
// grafana addition
|
||
|
|
if (opts.tickDecimals === null || opts.tickDecimals === undefined) {
|
||
|
|
axis.scaledDecimals = axis.tickDecimals + dec;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Time mode was moved to a plug-in in 0.8, and since so many people use it
|
||
|
|
// we'll add an especially friendly reminder to make sure they included it.
|
||
|
|
|
||
|
|
if (opts.mode == 'time' && !axis.tickGenerator) {
|
||
|
|
throw new Error('Time mode requires the flot.time plugin.');
|
||
|
|
}
|
||
|
|
|
||
|
|
// Flot supports base-10 axes; any other mode else is handled by a plug-in,
|
||
|
|
// like flot.time.js.
|
||
|
|
|
||
|
|
if (!axis.tickGenerator) {
|
||
|
|
axis.tickGenerator = function(axis) {
|
||
|
|
let ticks = [],
|
||
|
|
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;
|
||
|
|
};
|
||
|
|
|
||
|
|
axis.tickFormatter = function(value, axis) {
|
||
|
|
let factor = axis.tickDecimals ? Math.pow(10, axis.tickDecimals) : 1;
|
||
|
|
var formatted = '' + Math.round(value * factor) / factor;
|
||
|
|
|
||
|
|
// If tickDecimals was specified, ensure that we have exactly that
|
||
|
|
// much precision; otherwise default to the value's own precision.
|
||
|
|
|
||
|
|
if (axis.tickDecimals != null) {
|
||
|
|
var decimal = formatted.indexOf('.');
|
||
|
|
let precision = decimal == -1 ? 0 : formatted.length - decimal - 1;
|
||
|
|
if (precision < axis.tickDecimals) {
|
||
|
|
return (precision ? formatted : formatted + '.') + ('' + factor).substr(1, axis.tickDecimals - precision);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return formatted;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($.isFunction(opts.tickFormatter))
|
||
|
|
axis.tickFormatter = function(v, axis) {
|
||
|
|
return '' + opts.tickFormatter(v, axis);
|
||
|
|
};
|
||
|
|
|
||
|
|
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
|
||
|
|
let niceTicks = axis.tickGenerator(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]);
|
||
|
|
}
|
||
|
|
|
||
|
|
axis.tickGenerator = 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 && opts.tickDecimals == null) {
|
||
|
|
let extraDec = Math.max(0, -Math.floor(Math.log(axis.delta) / Math.LN10) + 1),
|
||
|
|
ts = axis.tickGenerator(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$/.test((ts[1] - ts[0]).toFixed(extraDec)))) axis.tickDecimals = extraDec;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function setTicks(axis) {
|
||
|
|
var oticks = axis.options.ticks,
|
||
|
|
ticks = [];
|
||
|
|
if (oticks == null || (typeof oticks == 'number' && oticks > 0)) ticks = axis.tickGenerator(axis);
|
||
|
|
else if (oticks) {
|
||
|
|
if ($.isFunction(oticks))
|
||
|
|
// generate the ticks
|
||
|
|
ticks = oticks(axis);
|
||
|
|
else ticks = oticks;
|
||
|
|
}
|
||
|
|
|
||
|
|
// clean up/labelify the supplied ticks, copy them over
|
||
|
|
let i, v;
|
||
|
|
axis.ticks = [];
|
||
|
|
for (i = 0; i < ticks.length; ++i) {
|
||
|
|
let label = null;
|
||
|
|
let 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) {
|
||
|
|
let changed = false;
|
||
|
|
if (axis.options.autoscaleMargin && ticks.length > 0) {
|
||
|
|
// snap to ticks
|
||
|
|
if (axis.options.min == null) {
|
||
|
|
axis.min = Math.min(axis.min, ticks[0].v);
|
||
|
|
changed = true;
|
||
|
|
}
|
||
|
|
if (axis.options.max == null && ticks.length > 1) {
|
||
|
|
axis.max = Math.max(axis.max, ticks[ticks.length - 1].v);
|
||
|
|
changed = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return changed;
|
||
|
|
}
|
||
|
|
|
||
|
|
function draw() {
|
||
|
|
surface.clear();
|
||
|
|
|
||
|
|
executeHooks(hooks.drawBackground, [ctx]);
|
||
|
|
|
||
|
|
let grid = options.grid;
|
||
|
|
|
||
|
|
// draw background, if any
|
||
|
|
if (grid.show && grid.backgroundColor) drawBackground();
|
||
|
|
|
||
|
|
if (grid.show && !grid.aboveData) {
|
||
|
|
drawGrid();
|
||
|
|
}
|
||
|
|
|
||
|
|
for (let 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();
|
||
|
|
}
|
||
|
|
|
||
|
|
surface.render();
|
||
|
|
|
||
|
|
// A draw implies that either the axes or data have changed, so we
|
||
|
|
// should probably update the overlay highlights as well.
|
||
|
|
|
||
|
|
triggerRedrawOverlay();
|
||
|
|
}
|
||
|
|
|
||
|
|
function extractRange(ranges, coord) {
|
||
|
|
var axis,
|
||
|
|
from,
|
||
|
|
to,
|
||
|
|
key,
|
||
|
|
axes = allAxes();
|
||
|
|
|
||
|
|
for (let 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) {
|
||
|
|
let 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() {
|
||
|
|
let i, axes, bw, bc;
|
||
|
|
|
||
|
|
ctx.save();
|
||
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
||
|
|
|
||
|
|
// draw markings
|
||
|
|
let markings = options.grid.markings;
|
||
|
|
if (markings) {
|
||
|
|
if ($.isFunction(markings)) {
|
||
|
|
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) {
|
||
|
|
let 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);
|
||
|
|
|
||
|
|
let xequal = xrange.from === xrange.to,
|
||
|
|
yequal = yrange.from === yrange.to;
|
||
|
|
|
||
|
|
if (xequal && yequal) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// then draw
|
||
|
|
xrange.from = Math.floor(xrange.axis.p2c(xrange.from));
|
||
|
|
xrange.to = Math.floor(xrange.axis.p2c(xrange.to));
|
||
|
|
yrange.from = Math.floor(yrange.axis.p2c(yrange.from));
|
||
|
|
yrange.to = Math.floor(yrange.axis.p2c(yrange.to));
|
||
|
|
|
||
|
|
if (xequal || yequal) {
|
||
|
|
let lineWidth = m.lineWidth || options.grid.markingsLineWidth,
|
||
|
|
subPixel = lineWidth % 2 ? 0.5 : 0;
|
||
|
|
ctx.beginPath();
|
||
|
|
ctx.strokeStyle = m.color || options.grid.markingsColor;
|
||
|
|
ctx.lineWidth = lineWidth;
|
||
|
|
if (xequal) {
|
||
|
|
ctx.moveTo(xrange.to + subPixel, yrange.from);
|
||
|
|
ctx.lineTo(xrange.to + subPixel, yrange.to);
|
||
|
|
} else {
|
||
|
|
ctx.moveTo(xrange.from, yrange.to + subPixel);
|
||
|
|
ctx.lineTo(xrange.to, yrange.to + subPixel);
|
||
|
|
}
|
||
|
|
ctx.stroke();
|
||
|
|
} else {
|
||
|
|
ctx.fillStyle = m.color || options.grid.markingsColor;
|
||
|
|
ctx.fillRect(xrange.from, yrange.to, xrange.to - xrange.from, yrange.from - yrange.to);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// draw the ticks
|
||
|
|
axes = allAxes();
|
||
|
|
bw = options.grid.borderWidth;
|
||
|
|
|
||
|
|
for (let 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.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.strokeStyle = axis.options.color;
|
||
|
|
ctx.beginPath();
|
||
|
|
xoff = yoff = 0;
|
||
|
|
if (axis.direction == 'x') xoff = plotWidth + 1;
|
||
|
|
else yoff = plotHeight + 1;
|
||
|
|
|
||
|
|
if (ctx.lineWidth == 1) {
|
||
|
|
if (axis.direction == 'x') {
|
||
|
|
y = Math.floor(y) + 0.5;
|
||
|
|
} else {
|
||
|
|
x = Math.floor(x) + 0.5;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ctx.moveTo(x, y);
|
||
|
|
ctx.lineTo(x + xoff, y + yoff);
|
||
|
|
ctx.stroke();
|
||
|
|
}
|
||
|
|
|
||
|
|
// draw ticks
|
||
|
|
|
||
|
|
ctx.strokeStyle = axis.options.tickColor;
|
||
|
|
|
||
|
|
ctx.beginPath();
|
||
|
|
for (i = 0; i < axis.ticks.length; ++i) {
|
||
|
|
let v = axis.ticks[i].v;
|
||
|
|
|
||
|
|
xoff = yoff = 0;
|
||
|
|
|
||
|
|
if (
|
||
|
|
isNaN(v) ||
|
||
|
|
v < axis.min ||
|
||
|
|
v > axis.max ||
|
||
|
|
// skip those lying on the axes if we got a border
|
||
|
|
(t == 'full' && ((typeof bw == 'object' && bw[axis.position] > 0) || 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) {
|
||
|
|
// If either borderWidth or borderColor is an object, then draw the border
|
||
|
|
// line by line instead of as one rectangle
|
||
|
|
bc = options.grid.borderColor;
|
||
|
|
if (typeof bw == 'object' || typeof bc == 'object') {
|
||
|
|
if (typeof bw !== 'object') {
|
||
|
|
bw = { top: bw, right: bw, bottom: bw, left: bw };
|
||
|
|
}
|
||
|
|
if (typeof bc !== 'object') {
|
||
|
|
bc = { top: bc, right: bc, bottom: bc, left: bc };
|
||
|
|
}
|
||
|
|
|
||
|
|
if (bw.top > 0) {
|
||
|
|
ctx.strokeStyle = bc.top;
|
||
|
|
ctx.lineWidth = bw.top;
|
||
|
|
ctx.beginPath();
|
||
|
|
ctx.moveTo(0 - bw.left, 0 - bw.top / 2);
|
||
|
|
ctx.lineTo(plotWidth, 0 - bw.top / 2);
|
||
|
|
ctx.stroke();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (bw.right > 0) {
|
||
|
|
ctx.strokeStyle = bc.right;
|
||
|
|
ctx.lineWidth = bw.right;
|
||
|
|
ctx.beginPath();
|
||
|
|
ctx.moveTo(plotWidth + bw.right / 2, 0 - bw.top);
|
||
|
|
ctx.lineTo(plotWidth + bw.right / 2, plotHeight);
|
||
|
|
ctx.stroke();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (bw.bottom > 0) {
|
||
|
|
ctx.strokeStyle = bc.bottom;
|
||
|
|
ctx.lineWidth = bw.bottom;
|
||
|
|
ctx.beginPath();
|
||
|
|
ctx.moveTo(plotWidth + bw.right, plotHeight + bw.bottom / 2);
|
||
|
|
ctx.lineTo(0, plotHeight + bw.bottom / 2);
|
||
|
|
ctx.stroke();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (bw.left > 0) {
|
||
|
|
ctx.strokeStyle = bc.left;
|
||
|
|
ctx.lineWidth = bw.left;
|
||
|
|
ctx.beginPath();
|
||
|
|
ctx.moveTo(0 - bw.left / 2, plotHeight + bw.bottom);
|
||
|
|
ctx.lineTo(0 - bw.left / 2, 0);
|
||
|
|
ctx.stroke();
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
ctx.lineWidth = bw;
|
||
|
|
ctx.strokeStyle = options.grid.borderColor;
|
||
|
|
ctx.strokeRect(-bw / 2, -bw / 2, plotWidth + bw, plotHeight + bw);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ctx.restore();
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawAxisLabels() {
|
||
|
|
$.each(allAxes(), function(_, axis) {
|
||
|
|
let box = axis.box,
|
||
|
|
legacyStyles = axis.direction + 'Axis ' + axis.direction + axis.n + 'Axis',
|
||
|
|
layer = 'flot-' + axis.direction + '-axis flot-' + axis.direction + axis.n + '-axis ' + legacyStyles,
|
||
|
|
font = axis.options.font || 'flot-tick-label tickLabel',
|
||
|
|
tick,
|
||
|
|
x,
|
||
|
|
y,
|
||
|
|
halign,
|
||
|
|
valign;
|
||
|
|
|
||
|
|
// Remove text before checking for axis.show and ticks.length;
|
||
|
|
// otherwise plugins, like flot-tickrotor, that draw their own
|
||
|
|
// tick labels will end up with both theirs and the defaults.
|
||
|
|
|
||
|
|
surface.removeText(layer);
|
||
|
|
|
||
|
|
if (!axis.show || axis.ticks.length == 0) return;
|
||
|
|
|
||
|
|
for (let i = 0; i < axis.ticks.length; ++i) {
|
||
|
|
tick = axis.ticks[i];
|
||
|
|
if (!tick.label || tick.v < axis.min || tick.v > axis.max) continue;
|
||
|
|
|
||
|
|
if (axis.direction == 'x') {
|
||
|
|
halign = 'center';
|
||
|
|
x = plotOffset.left + axis.p2c(tick.v);
|
||
|
|
if (axis.position == 'bottom') {
|
||
|
|
y = box.top + box.padding + box.eventSectionPadding;
|
||
|
|
} else {
|
||
|
|
y = box.top + box.height - box.padding;
|
||
|
|
valign = 'bottom';
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
valign = 'middle';
|
||
|
|
y = plotOffset.top + axis.p2c(tick.v);
|
||
|
|
if (axis.position == 'left') {
|
||
|
|
x = box.left + box.width - box.padding;
|
||
|
|
halign = 'right';
|
||
|
|
} else {
|
||
|
|
x = box.left + box.padding;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
surface.addText(layer, x, y, tick.label, font, null, null, halign, valign);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawOrphanedPoints(series) {
|
||
|
|
/* Filters series data for points with no neighbors before or after
|
||
|
|
* and plots single 0.5 radius points for them so that they are displayed.
|
||
|
|
*/
|
||
|
|
let abandonedPoints = [];
|
||
|
|
let beforeX = null;
|
||
|
|
let afterX = null;
|
||
|
|
let datapoints = series.datapoints;
|
||
|
|
// find any points with no neighbors before or after
|
||
|
|
let emptyPoints = [];
|
||
|
|
for (let j = 0; j < datapoints.pointsize - 2; j++) {
|
||
|
|
emptyPoints.push(0);
|
||
|
|
}
|
||
|
|
for (let i = 0; i < datapoints.points.length; i += datapoints.pointsize) {
|
||
|
|
var x = datapoints.points[i],
|
||
|
|
y = datapoints.points[i + 1];
|
||
|
|
if (i === datapoints.points.length - datapoints.pointsize) {
|
||
|
|
afterX = null;
|
||
|
|
} else {
|
||
|
|
afterX = datapoints.points[i + datapoints.pointsize];
|
||
|
|
}
|
||
|
|
if (x !== null && y !== null && beforeX === null && afterX === null) {
|
||
|
|
abandonedPoints.push(x);
|
||
|
|
abandonedPoints.push(y);
|
||
|
|
abandonedPoints.push.apply(abandonedPoints, emptyPoints);
|
||
|
|
}
|
||
|
|
beforeX = x;
|
||
|
|
}
|
||
|
|
var olddatapoints = datapoints.points;
|
||
|
|
datapoints.points = abandonedPoints;
|
||
|
|
|
||
|
|
series.points.radius = series.lines.lineWidth / 2;
|
||
|
|
// plot the orphan points with a radius of lineWidth/2
|
||
|
|
drawSeriesPoints(series);
|
||
|
|
// reset old info
|
||
|
|
datapoints.points = olddatapoints;
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawSeries(series) {
|
||
|
|
if (series.lines.show) {
|
||
|
|
drawSeriesLines(series);
|
||
|
|
if (!series.points.show && !series.bars.show) {
|
||
|
|
// not necessary if user wants points displayed for everything
|
||
|
|
drawOrphanedPoints(series);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (series.bars.show) drawSeriesBars(series);
|
||
|
|
if (series.points.show) drawSeriesPoints(series);
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawSeriesLines(series) {
|
||
|
|
function plotLine(datapoints, xoffset, yoffset, axisx, axisy) {
|
||
|
|
let points = datapoints.points,
|
||
|
|
ps = datapoints.pointsize,
|
||
|
|
prevx = null,
|
||
|
|
prevy = null;
|
||
|
|
|
||
|
|
ctx.beginPath();
|
||
|
|
for (let 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) {
|
||
|
|
let points = datapoints.points,
|
||
|
|
ps = datapoints.pointsize,
|
||
|
|
bottom = Math.min(Math.max(0, axisy.min), axisy.max),
|
||
|
|
i = 0,
|
||
|
|
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
|
||
|
|
|
||
|
|
let 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';
|
||
|
|
|
||
|
|
let 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;
|
||
|
|
let 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 (let 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);
|
||
|
|
|
||
|
|
let lw = series.points.lineWidth,
|
||
|
|
sw = series.shadowSize,
|
||
|
|
radius = series.points.radius,
|
||
|
|
symbol = series.points.symbol;
|
||
|
|
|
||
|
|
// If the user sets the line width to 0, we change it to a very
|
||
|
|
// small value. A line width of 0 seems to force the default of 1.
|
||
|
|
// Doing the conditional here allows the shadow setting to still be
|
||
|
|
// optional even with a lineWidth of 0.
|
||
|
|
|
||
|
|
if (lw == 0) lw = 0.0001;
|
||
|
|
|
||
|
|
if (lw > 0 && sw > 0) {
|
||
|
|
// draw shadow in two steps
|
||
|
|
let 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, 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.fillStyle = fillStyleCallback(bottom, top);
|
||
|
|
c.fillRect(left, top, right - left, bottom - top);
|
||
|
|
}
|
||
|
|
|
||
|
|
// draw outline
|
||
|
|
if (lineWidth > 0 && (drawLeft || drawRight || drawTop || drawBottom)) {
|
||
|
|
c.beginPath();
|
||
|
|
|
||
|
|
// FIXME: inline moveTo is buggy with excanvas
|
||
|
|
c.moveTo(left, bottom);
|
||
|
|
if (drawLeft) c.lineTo(left, top);
|
||
|
|
else c.moveTo(left, top);
|
||
|
|
if (drawTop) c.lineTo(right, top);
|
||
|
|
else c.moveTo(right, top);
|
||
|
|
if (drawRight) c.lineTo(right, bottom);
|
||
|
|
else c.moveTo(right, bottom);
|
||
|
|
if (drawBottom) c.lineTo(left, bottom);
|
||
|
|
else c.moveTo(left, bottom);
|
||
|
|
c.stroke();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawSeriesBars(series) {
|
||
|
|
function plotBars(datapoints, barLeft, barRight, fillStyleCallback, axisx, axisy) {
|
||
|
|
var points = datapoints.points,
|
||
|
|
ps = datapoints.pointsize;
|
||
|
|
|
||
|
|
for (let i = 0; i < points.length; i += ps) {
|
||
|
|
if (points[i] == null) continue;
|
||
|
|
drawBar(
|
||
|
|
points[i],
|
||
|
|
points[i + 1],
|
||
|
|
points[i + 2],
|
||
|
|
barLeft,
|
||
|
|
barRight,
|
||
|
|
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;
|
||
|
|
|
||
|
|
let barLeft;
|
||
|
|
|
||
|
|
switch (series.bars.align) {
|
||
|
|
case 'left':
|
||
|
|
barLeft = 0;
|
||
|
|
break;
|
||
|
|
case 'right':
|
||
|
|
barLeft = -series.bars.barWidth;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
barLeft = -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, fillStyleCallback, series.xaxis, series.yaxis);
|
||
|
|
ctx.restore();
|
||
|
|
}
|
||
|
|
|
||
|
|
function getFillStyle(filloptions, seriesColor, bottom, top) {
|
||
|
|
let fill = filloptions.fill;
|
||
|
|
if (!fill) return null;
|
||
|
|
|
||
|
|
if (filloptions.fillColor) return getColorOrGradient(filloptions.fillColor, bottom, top, seriesColor);
|
||
|
|
|
||
|
|
let c = $.color.parse(seriesColor);
|
||
|
|
c.a = typeof fill == 'number' ? fill : 0.4;
|
||
|
|
c.normalize();
|
||
|
|
return c.toString();
|
||
|
|
}
|
||
|
|
|
||
|
|
function insertLegend() {
|
||
|
|
if (options.legend.container != null) {
|
||
|
|
$(options.legend.container).html('');
|
||
|
|
} else {
|
||
|
|
placeholder.find('.legend').remove();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!options.legend.show) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
var fragments = [],
|
||
|
|
entries = [],
|
||
|
|
rowStarted = false,
|
||
|
|
lf = options.legend.labelFormatter,
|
||
|
|
s,
|
||
|
|
label;
|
||
|
|
|
||
|
|
// Build a list of legend entries, with each having a label and a color
|
||
|
|
|
||
|
|
for (var i = 0; i < series.length; ++i) {
|
||
|
|
s = series[i];
|
||
|
|
if (s.label) {
|
||
|
|
label = lf ? lf(s.label, s) : s.label;
|
||
|
|
if (label) {
|
||
|
|
entries.push({
|
||
|
|
label: label,
|
||
|
|
color: s.color,
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Sort the legend using either the default or a custom comparator
|
||
|
|
|
||
|
|
if (options.legend.sorted) {
|
||
|
|
if ($.isFunction(options.legend.sorted)) {
|
||
|
|
entries.sort(options.legend.sorted);
|
||
|
|
} else if (options.legend.sorted == 'reverse') {
|
||
|
|
entries.reverse();
|
||
|
|
} else {
|
||
|
|
var ascending = options.legend.sorted != 'descending';
|
||
|
|
entries.sort(function(a, b) {
|
||
|
|
// eslint-disable-next-line
|
||
|
|
return a.label == b.label ? 0 : a.label < b.label != ascending ? 1 : -1; // Logical XOR
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Generate markup for the list of entries, in their final order
|
||
|
|
|
||
|
|
for (var i = 0; i < entries.length; ++i) {
|
||
|
|
let entry = entries[i];
|
||
|
|
|
||
|
|
if (i % options.legend.noColumns == 0) {
|
||
|
|
if (rowStarted) fragments.push('</tr>');
|
||
|
|
fragments.push('<tr>');
|
||
|
|
rowStarted = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
fragments.push(
|
||
|
|
'<td class="legendColorBox"><div style="border:1px solid ' +
|
||
|
|
options.legend.labelBoxBorderColor +
|
||
|
|
';padding:1px"><div style="width:4px;height:0;border:5px solid ' +
|
||
|
|
entry.color +
|
||
|
|
';overflow:hidden"></div></div></td>' +
|
||
|
|
'<td class="legendLabel">' +
|
||
|
|
entry.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
|
||
|
|
let 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();
|
||
|
|
}
|
||
|
|
let 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) {
|
||
|
|
let maxDistance = options.grid.mouseActiveRadius,
|
||
|
|
smallestDistance = maxDistance * maxDistance + 1,
|
||
|
|
item = null,
|
||
|
|
i,
|
||
|
|
j,
|
||
|
|
ps;
|
||
|
|
|
||
|
|
for (i = series.length - 1; i >= 0; --i) {
|
||
|
|
if (!seriesFilter(series[i])) continue;
|
||
|
|
|
||
|
|
let s = series[i],
|
||
|
|
axisx = s.xaxis,
|
||
|
|
axisy = s.yaxis,
|
||
|
|
points = s.datapoints.points,
|
||
|
|
mx = axisx.c2p(mouseX), // precompute some stuff to make the loop faster
|
||
|
|
my = axisy.c2p(mouseY),
|
||
|
|
maxx = maxDistance / axisx.scale,
|
||
|
|
maxy = maxDistance / axisy.scale;
|
||
|
|
|
||
|
|
ps = s.datapoints.pointsize;
|
||
|
|
// 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
|
||
|
|
let 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, barRight;
|
||
|
|
|
||
|
|
switch (s.bars.align) {
|
||
|
|
case 'left':
|
||
|
|
barLeft = 0;
|
||
|
|
break;
|
||
|
|
case 'right':
|
||
|
|
barLeft = -s.bars.barWidth;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
barLeft = -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() {
|
||
|
|
return false;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
function onClick(e) {
|
||
|
|
if (plot.isSelecting) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
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) {
|
||
|
|
let 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;
|
||
|
|
|
||
|
|
// Add ctrlKey and metaKey to event
|
||
|
|
pos.ctrlKey = event.ctrlKey;
|
||
|
|
pos.metaKey = event.metaKey;
|
||
|
|
|
||
|
|
let 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, 10);
|
||
|
|
item.pageY = parseInt(item.series.yaxis.p2c(item.datapoint[1]) + offset.top + plotOffset.top, 10);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (options.grid.autoHighlight) {
|
||
|
|
// clear auto-highlights
|
||
|
|
for (let i = 0; i < highlights.length; ++i) {
|
||
|
|
let 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() {
|
||
|
|
let t = options.interaction.redrawOverlayInterval;
|
||
|
|
if (t == -1) {
|
||
|
|
// skip event queue
|
||
|
|
drawOverlay();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!redrawTimeout) redrawTimeout = setTimeout(drawOverlay, t);
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawOverlay() {
|
||
|
|
redrawTimeout = null;
|
||
|
|
|
||
|
|
// draw highlights
|
||
|
|
octx.save();
|
||
|
|
overlay.clear();
|
||
|
|
octx.translate(plotOffset.left, plotOffset.top);
|
||
|
|
|
||
|
|
let 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') {
|
||
|
|
let ps = s.datapoints.pointsize;
|
||
|
|
point = s.datapoints.points.slice(ps * point, ps * (point + 1));
|
||
|
|
}
|
||
|
|
|
||
|
|
let 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();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (typeof s == 'number') s = series[s];
|
||
|
|
|
||
|
|
if (typeof point == 'number') {
|
||
|
|
let ps = s.datapoints.pointsize;
|
||
|
|
point = s.datapoints.points.slice(ps * point, ps * (point + 1));
|
||
|
|
}
|
||
|
|
|
||
|
|
let i = indexOfHighlight(s, point);
|
||
|
|
if (i != -1) {
|
||
|
|
highlights.splice(i, 1);
|
||
|
|
|
||
|
|
triggerRedrawOverlay();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function indexOfHighlight(s, p) {
|
||
|
|
for (let i = 0; i < highlights.length; ++i) {
|
||
|
|
let 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,
|
||
|
|
highlightColor =
|
||
|
|
typeof series.highlightColor === 'string'
|
||
|
|
? series.highlightColor
|
||
|
|
: $.color
|
||
|
|
.parse(series.color)
|
||
|
|
.scale('a', 0.5)
|
||
|
|
.toString();
|
||
|
|
|
||
|
|
if (x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max) return;
|
||
|
|
|
||
|
|
let pointRadius = series.points.radius + series.points.lineWidth / 2;
|
||
|
|
octx.lineWidth = pointRadius;
|
||
|
|
octx.strokeStyle = highlightColor;
|
||
|
|
let 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) {
|
||
|
|
var highlightColor =
|
||
|
|
typeof series.highlightColor === 'string'
|
||
|
|
? series.highlightColor
|
||
|
|
: $.color
|
||
|
|
.parse(series.color)
|
||
|
|
.scale('a', 0.5)
|
||
|
|
.toString(),
|
||
|
|
fillStyle = highlightColor,
|
||
|
|
barLeft;
|
||
|
|
|
||
|
|
switch (series.bars.align) {
|
||
|
|
case 'left':
|
||
|
|
barLeft = 0;
|
||
|
|
break;
|
||
|
|
case 'right':
|
||
|
|
barLeft = -series.bars.barWidth;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
barLeft = -series.bars.barWidth / 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
octx.lineWidth = series.bars.lineWidth;
|
||
|
|
octx.strokeStyle = highlightColor;
|
||
|
|
|
||
|
|
drawBar(
|
||
|
|
point[0],
|
||
|
|
point[1],
|
||
|
|
point[2] || 0,
|
||
|
|
barLeft,
|
||
|
|
barLeft + series.bars.barWidth,
|
||
|
|
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
|
||
|
|
let gradient = ctx.createLinearGradient(0, top, 0, bottom);
|
||
|
|
|
||
|
|
for (let i = 0, l = spec.colors.length; i < l; ++i) {
|
||
|
|
let c = spec.colors[i];
|
||
|
|
if (typeof c != 'string') {
|
||
|
|
let 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;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Add the plot function to the top level of the jQuery object
|
||
|
|
|
||
|
|
$.plot = function(placeholder, data, options) {
|
||
|
|
//var t0 = new Date();
|
||
|
|
let plot = new Plot($(placeholder), data, options, $.plot.plugins);
|
||
|
|
//(window.console ? console.log : alert)("time used (msecs): " + ((new Date()).getTime() - t0.getTime()));
|
||
|
|
return plot;
|
||
|
|
};
|
||
|
|
|
||
|
|
$.plot.version = '0.8.3';
|
||
|
|
|
||
|
|
$.plot.plugins = [];
|
||
|
|
|
||
|
|
// Also add the plot function as a chainable property
|
||
|
|
|
||
|
|
$.fn.plot = function(data, options) {
|
||
|
|
return this.each(function() {
|
||
|
|
$.plot(this, data, options);
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
// round to nearby lower multiple of base
|
||
|
|
function floorInBase(n, base) {
|
||
|
|
return base * Math.floor(n / base);
|
||
|
|
}
|
||
|
|
})(window.jQuery);
|