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3124 lines
93 KiB
3124 lines
93 KiB
1 year ago
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/* Javascript plotting library for jQuery, version 0.8 alpha.
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Copyright (c) 2007-2012 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 (B) {
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B.color = {};
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B.color.make = function (F, E, C, D) {
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var G = {};
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G.r = F || 0;
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G.g = E || 0;
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G.b = C || 0;
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G.a = D != null ? D : 1;
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G.add = function (J, I) {
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for (var H = 0; H < J.length; ++H) {
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G[J.charAt(H)] += I;
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}
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return G.normalize();
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};
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G.scale = function (J, I) {
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for (var H = 0; H < J.length; ++H) {
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G[J.charAt(H)] *= I;
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}
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return G.normalize();
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};
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G.toString = function () {
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if (G.a >= 1) {
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return "rgb(" + [G.r, G.g, G.b].join(",") + ")";
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} else {
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return "rgba(" + [G.r, G.g, G.b, G.a].join(",") + ")";
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}
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};
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G.normalize = function () {
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function H(J, K, I) {
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return K < J ? J : K > I ? I : K;
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}
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G.r = H(0, parseInt(G.r), 255);
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G.g = H(0, parseInt(G.g), 255);
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G.b = H(0, parseInt(G.b), 255);
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G.a = H(0, G.a, 1);
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return G;
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};
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G.clone = function () {
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return B.color.make(G.r, G.b, G.g, G.a);
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};
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return G.normalize();
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};
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B.color.extract = function (D, C) {
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var E;
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do {
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E = D.css(C).toLowerCase();
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if (E != "" && E != "transparent") {
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break;
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}
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D = D.parent();
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} while (!B.nodeName(D.get(0), "body"));
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if (E == "rgba(0, 0, 0, 0)") {
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E = "transparent";
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}
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return B.color.parse(E);
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};
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B.color.parse = function (F) {
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var E,
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C = B.color.make;
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if (
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(E =
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/rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(
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F
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))
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) {
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return C(parseInt(E[1], 10), parseInt(E[2], 10), parseInt(E[3], 10));
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}
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if (
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(E =
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/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(
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F
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))
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) {
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return C(
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parseInt(E[1], 10),
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parseInt(E[2], 10),
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parseInt(E[3], 10),
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parseFloat(E[4])
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);
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}
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if (
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(E =
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/rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(
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F
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))
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) {
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return C(
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parseFloat(E[1]) * 2.55,
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parseFloat(E[2]) * 2.55,
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parseFloat(E[3]) * 2.55
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);
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}
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if (
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(E =
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/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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F
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))
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) {
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return C(
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parseFloat(E[1]) * 2.55,
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parseFloat(E[2]) * 2.55,
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parseFloat(E[3]) * 2.55,
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parseFloat(E[4])
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);
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}
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if ((E = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(F))) {
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return C(parseInt(E[1], 16), parseInt(E[2], 16), parseInt(E[3], 16));
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}
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if ((E = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(F))) {
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return C(
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parseInt(E[1] + E[1], 16),
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parseInt(E[2] + E[2], 16),
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parseInt(E[3] + E[3], 16)
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);
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}
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var D = B.trim(F).toLowerCase();
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if (D == "transparent") {
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return C(255, 255, 255, 0);
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} else {
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E = A[D] || [0, 0, 0];
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return C(E[0], E[1], E[2]);
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}
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};
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var A = {
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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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})(jQuery);
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// the actual Flot code
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(function ($) {
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function Plot(placeholder, data_, options_, plugins) {
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// data is on the form:
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// [ series1, series2 ... ]
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// where series is either just the data as [ [x1, y1], [x2, y2], ... ]
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// or { data: [ [x1, y1], [x2, y2], ... ], label: "some label", ... }
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var series = [],
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options = {
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// the color theme used for graphs
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colors: ["#edc240", "#afd8f8", "#cb4b4b", "#4da74d", "#9440ed"],
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legend: {
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show: true,
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noColumns: 1, // number of colums in legend table
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labelFormatter: null, // fn: string -> string
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labelBoxBorderColor: "#ccc", // border color for the little label boxes
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container: null, // container (as jQuery object) to put legend in, null means default on top of graph
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position: "ne", // position of default legend container within plot
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margin: 5, // distance from grid edge to default legend container within plot
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backgroundColor: null, // null means auto-detect
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backgroundOpacity: 0.85, // set to 0 to avoid background
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sorted: null, // default to no legend sorting
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},
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xaxis: {
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show: null, // null = auto-detect, true = always, false = never
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position: "bottom", // or "top"
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mode: null, // null or "time"
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timezone: null, // "browser" for local to the client or timezone for timezone-js
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font: null, // null (derived from CSS in placeholder) or object like { size: 11, style: "italic", weight: "bold", family: "sans-serif", variant: "small-caps" }
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color: null, // base color, labels, ticks
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tickColor: null, // possibly different color of ticks, e.g. "rgba(0,0,0,0.15)"
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transform: null, // null or f: number -> number to transform axis
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inverseTransform: null, // if transform is set, this should be the inverse function
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min: null, // min. value to show, null means set automatically
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max: null, // max. value to show, null means set automatically
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autoscaleMargin: null, // margin in % to add if auto-setting min/max
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ticks: null, // either [1, 3] or [[1, "a"], 3] or (fn: axis info -> ticks) or app. number of ticks for auto-ticks
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tickFormatter: null, // fn: number -> string
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labelWidth: null, // size of tick labels in pixels
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labelHeight: null,
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reserveSpace: null, // whether to reserve space even if axis isn't shown
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tickLength: null, // size in pixels of ticks, or "full" for whole line
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alignTicksWithAxis: null, // axis number or null for no sync
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// mode specific options
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tickDecimals: null, // no. of decimals, null means auto
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tickSize: null, // number or [number, "unit"]
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minTickSize: null, // number or [number, "unit"]
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monthNames: null, // list of names of months
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timeformat: null, // format string to use
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twelveHourClock: false, // 12 or 24 time in time mode
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},
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yaxis: {
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autoscaleMargin: 0.02,
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position: "left", // or "right"
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},
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xaxes: [],
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yaxes: [],
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series: {
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points: {
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show: false,
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radius: 3,
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lineWidth: 2, // in pixels
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fill: true,
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fillColor: "#ffffff",
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symbol: "circle", // or callback
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},
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lines: {
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// we don't put in show: false so we can see
|
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// whether lines were actively disabled
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lineWidth: 2, // in pixels
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fill: false,
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fillColor: null,
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steps: false,
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// Omit 'zero', so we can later default its value to
|
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// match that of the 'fill' option.
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},
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bars: {
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show: false,
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lineWidth: 2, // in pixels
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barWidth: 1, // in units of the x axis
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fill: true,
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fillColor: null,
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align: "left", // "left", "right", or "center"
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horizontal: false,
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zero: true,
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},
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shadowSize: 3,
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highlightColor: null,
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||
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},
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grid: {
|
||
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show: true,
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||
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aboveData: false,
|
||
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color: "#545454", // primary color used for outline and labels
|
||
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backgroundColor: null, // null for transparent, else color
|
||
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borderColor: null, // set if different from the grid color
|
||
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tickColor: null, // color for the ticks, e.g. "rgba(0,0,0,0.15)"
|
||
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margin: 0, // distance from the canvas edge to the grid
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||
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labelMargin: 5, // in pixels
|
||
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axisMargin: 8, // in pixels
|
||
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borderWidth: 2, // in pixels
|
||
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minBorderMargin: null, // in pixels, null means taken from points radius
|
||
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markings: null, // array of ranges or fn: axes -> array of ranges
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||
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markingsColor: "#f4f4f4",
|
||
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markingsLineWidth: 2,
|
||
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// interactive stuff
|
||
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clickable: false,
|
||
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hoverable: false,
|
||
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autoHighlight: true, // highlight in case mouse is near
|
||
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mouseActiveRadius: 10, // how far the mouse can be away to activate an item
|
||
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},
|
||
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interaction: {
|
||
|
|
redrawOverlayInterval: 1000 / 60, // time between updates, -1 means in same flow
|
||
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},
|
||
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hooks: {},
|
||
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},
|
||
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|
canvas = null, // the canvas for the plot itself
|
||
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overlay = null, // canvas for interactive stuff on top of plot
|
||
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eventHolder = null, // jQuery object that events should be bound to
|
||
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ctx = null,
|
||
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octx = null,
|
||
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xaxes = [],
|
||
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yaxes = [],
|
||
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plotOffset = { left: 0, right: 0, top: 0, bottom: 0 },
|
||
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canvasWidth = 0,
|
||
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canvasHeight = 0,
|
||
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plotWidth = 0,
|
||
|
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plotHeight = 0,
|
||
|
|
hooks = {
|
||
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processOptions: [],
|
||
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processRawData: [],
|
||
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processDatapoints: [],
|
||
|
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processOffset: [],
|
||
|
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drawBackground: [],
|
||
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drawSeries: [],
|
||
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draw: [],
|
||
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bindEvents: [],
|
||
|
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drawOverlay: [],
|
||
|
|
shutdown: [],
|
||
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},
|
||
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plot = this;
|
||
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|
||
|
|
// public functions
|
||
|
|
plot.setData = setData;
|
||
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|
plot.setupGrid = setupGrid;
|
||
|
|
plot.draw = draw;
|
||
|
|
plot.getPlaceholder = function () {
|
||
|
|
return placeholder;
|
||
|
|
};
|
||
|
|
plot.getCanvas = function () {
|
||
|
|
return canvas;
|
||
|
|
};
|
||
|
|
plot.getPlotOffset = function () {
|
||
|
|
return plotOffset;
|
||
|
|
};
|
||
|
|
plot.width = function () {
|
||
|
|
return plotWidth;
|
||
|
|
};
|
||
|
|
plot.height = function () {
|
||
|
|
return plotHeight;
|
||
|
|
};
|
||
|
|
plot.offset = function () {
|
||
|
|
var o = eventHolder.offset();
|
||
|
|
o.left += plotOffset.left;
|
||
|
|
o.top += plotOffset.top;
|
||
|
|
return o;
|
||
|
|
};
|
||
|
|
plot.getData = function () {
|
||
|
|
return series;
|
||
|
|
};
|
||
|
|
plot.getAxes = function () {
|
||
|
|
var res = {},
|
||
|
|
i;
|
||
|
|
$.each(xaxes.concat(yaxes), function (_, axis) {
|
||
|
|
if (axis)
|
||
|
|
res[axis.direction + (axis.n != 1 ? axis.n : "") + "axis"] = axis;
|
||
|
|
});
|
||
|
|
return res;
|
||
|
|
};
|
||
|
|
plot.getXAxes = function () {
|
||
|
|
return xaxes;
|
||
|
|
};
|
||
|
|
plot.getYAxes = function () {
|
||
|
|
return yaxes;
|
||
|
|
};
|
||
|
|
plot.c2p = canvasToAxisCoords;
|
||
|
|
plot.p2c = axisToCanvasCoords;
|
||
|
|
plot.getOptions = function () {
|
||
|
|
return options;
|
||
|
|
};
|
||
|
|
plot.highlight = highlight;
|
||
|
|
plot.unhighlight = unhighlight;
|
||
|
|
plot.triggerRedrawOverlay = triggerRedrawOverlay;
|
||
|
|
plot.pointOffset = function (point) {
|
||
|
|
return {
|
||
|
|
left: parseInt(
|
||
|
|
xaxes[axisNumber(point, "x") - 1].p2c(+point.x) + plotOffset.left,
|
||
|
|
10
|
||
|
|
),
|
||
|
|
top: parseInt(
|
||
|
|
yaxes[axisNumber(point, "y") - 1].p2c(+point.y) + plotOffset.top,
|
||
|
|
10
|
||
|
|
),
|
||
|
|
};
|
||
|
|
};
|
||
|
|
plot.shutdown = shutdown;
|
||
|
|
plot.resize = function () {
|
||
|
|
getCanvasDimensions();
|
||
|
|
resizeCanvas(canvas);
|
||
|
|
resizeCanvas(overlay);
|
||
|
|
};
|
||
|
|
|
||
|
|
// public attributes
|
||
|
|
plot.hooks = hooks;
|
||
|
|
|
||
|
|
// initialize
|
||
|
|
initPlugins(plot);
|
||
|
|
parseOptions(options_);
|
||
|
|
setupCanvases();
|
||
|
|
setData(data_);
|
||
|
|
setupGrid();
|
||
|
|
draw();
|
||
|
|
bindEvents();
|
||
|
|
|
||
|
|
function executeHooks(hook, args) {
|
||
|
|
args = [plot].concat(args);
|
||
|
|
for (var i = 0; i < hook.length; ++i) hook[i].apply(this, args);
|
||
|
|
}
|
||
|
|
|
||
|
|
function initPlugins() {
|
||
|
|
for (var i = 0; i < plugins.length; ++i) {
|
||
|
|
var p = plugins[i];
|
||
|
|
p.init(plot);
|
||
|
|
if (p.options) $.extend(true, options, p.options);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseOptions(opts) {
|
||
|
|
var i;
|
||
|
|
|
||
|
|
$.extend(true, options, opts);
|
||
|
|
|
||
|
|
if (options.xaxis.color == null) options.xaxis.color = options.grid.color;
|
||
|
|
if (options.yaxis.color == null) options.yaxis.color = options.grid.color;
|
||
|
|
|
||
|
|
if (options.xaxis.tickColor == null)
|
||
|
|
// backwards-compatibility
|
||
|
|
options.xaxis.tickColor = options.grid.tickColor;
|
||
|
|
if (options.yaxis.tickColor == null)
|
||
|
|
// backwards-compatibility
|
||
|
|
options.yaxis.tickColor = options.grid.tickColor;
|
||
|
|
|
||
|
|
if (options.grid.borderColor == null)
|
||
|
|
options.grid.borderColor = options.grid.color;
|
||
|
|
if (options.grid.tickColor == null)
|
||
|
|
options.grid.tickColor = $.color
|
||
|
|
.parse(options.grid.color)
|
||
|
|
.scale("a", 0.22)
|
||
|
|
.toString();
|
||
|
|
|
||
|
|
// fill in defaults in axes, copy at least always the
|
||
|
|
// first as the rest of the code assumes it'll be there
|
||
|
|
for (i = 0; i < Math.max(1, options.xaxes.length); ++i)
|
||
|
|
options.xaxes[i] = $.extend(true, {}, options.xaxis, options.xaxes[i]);
|
||
|
|
for (i = 0; i < Math.max(1, options.yaxes.length); ++i)
|
||
|
|
options.yaxes[i] = $.extend(true, {}, options.yaxis, options.yaxes[i]);
|
||
|
|
|
||
|
|
// backwards compatibility, to be removed in future
|
||
|
|
if (options.xaxis.noTicks && options.xaxis.ticks == null)
|
||
|
|
options.xaxis.ticks = options.xaxis.noTicks;
|
||
|
|
if (options.yaxis.noTicks && options.yaxis.ticks == null)
|
||
|
|
options.yaxis.ticks = options.yaxis.noTicks;
|
||
|
|
if (options.x2axis) {
|
||
|
|
options.xaxes[1] = $.extend(true, {}, options.xaxis, options.x2axis);
|
||
|
|
options.xaxes[1].position = "top";
|
||
|
|
}
|
||
|
|
if (options.y2axis) {
|
||
|
|
options.yaxes[1] = $.extend(true, {}, options.yaxis, options.y2axis);
|
||
|
|
options.yaxes[1].position = "right";
|
||
|
|
}
|
||
|
|
if (options.grid.coloredAreas)
|
||
|
|
options.grid.markings = options.grid.coloredAreas;
|
||
|
|
if (options.grid.coloredAreasColor)
|
||
|
|
options.grid.markingsColor = options.grid.coloredAreasColor;
|
||
|
|
if (options.lines) $.extend(true, options.series.lines, options.lines);
|
||
|
|
if (options.points) $.extend(true, options.series.points, options.points);
|
||
|
|
if (options.bars) $.extend(true, options.series.bars, options.bars);
|
||
|
|
if (options.shadowSize != null)
|
||
|
|
options.series.shadowSize = options.shadowSize;
|
||
|
|
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) {
|
||
|
|
var res = [];
|
||
|
|
for (var i = 0; i < d.length; ++i) {
|
||
|
|
var s = $.extend(true, {}, options.series);
|
||
|
|
|
||
|
|
if (d[i].data != null) {
|
||
|
|
s.data = d[i].data; // move the data instead of deep-copy
|
||
|
|
delete d[i].data;
|
||
|
|
|
||
|
|
$.extend(true, s, d[i]);
|
||
|
|
|
||
|
|
d[i].data = s.data;
|
||
|
|
} else s.data = d[i];
|
||
|
|
res.push(s);
|
||
|
|
}
|
||
|
|
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
function axisNumber(obj, coord) {
|
||
|
|
var a = obj[coord + "axis"];
|
||
|
|
if (typeof a == "object")
|
||
|
|
// if we got a real axis, extract number
|
||
|
|
a = a.n;
|
||
|
|
if (typeof a != "number") a = 1; // default to first axis
|
||
|
|
return a;
|
||
|
|
}
|
||
|
|
|
||
|
|
function allAxes() {
|
||
|
|
// return flat array without annoying null entries
|
||
|
|
return $.grep(xaxes.concat(yaxes), function (a) {
|
||
|
|
return a;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
function canvasToAxisCoords(pos) {
|
||
|
|
// return an object with x/y corresponding to all used axes
|
||
|
|
var res = {},
|
||
|
|
i,
|
||
|
|
axis;
|
||
|
|
for (i = 0; i < xaxes.length; ++i) {
|
||
|
|
axis = xaxes[i];
|
||
|
|
if (axis && axis.used) res["x" + axis.n] = axis.c2p(pos.left);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < yaxes.length; ++i) {
|
||
|
|
axis = yaxes[i];
|
||
|
|
if (axis && axis.used) res["y" + axis.n] = axis.c2p(pos.top);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (res.x1 !== undefined) res.x = res.x1;
|
||
|
|
if (res.y1 !== undefined) res.y = res.y1;
|
||
|
|
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
function axisToCanvasCoords(pos) {
|
||
|
|
// get canvas coords from the first pair of x/y found in pos
|
||
|
|
var res = {},
|
||
|
|
i,
|
||
|
|
axis,
|
||
|
|
key;
|
||
|
|
|
||
|
|
for (i = 0; i < xaxes.length; ++i) {
|
||
|
|
axis = xaxes[i];
|
||
|
|
if (axis && axis.used) {
|
||
|
|
key = "x" + axis.n;
|
||
|
|
if (pos[key] == null && axis.n == 1) key = "x";
|
||
|
|
|
||
|
|
if (pos[key] != null) {
|
||
|
|
res.left = axis.p2c(pos[key]);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < yaxes.length; ++i) {
|
||
|
|
axis = yaxes[i];
|
||
|
|
if (axis && axis.used) {
|
||
|
|
key = "y" + axis.n;
|
||
|
|
if (pos[key] == null && axis.n == 1) key = "y";
|
||
|
|
|
||
|
|
if (pos[key] != null) {
|
||
|
|
res.top = axis.p2c(pos[key]);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
function getOrCreateAxis(axes, number) {
|
||
|
|
if (!axes[number - 1])
|
||
|
|
axes[number - 1] = {
|
||
|
|
n: number, // save the number for future reference
|
||
|
|
direction: axes == xaxes ? "x" : "y",
|
||
|
|
options: $.extend(
|
||
|
|
true,
|
||
|
|
{},
|
||
|
|
axes == xaxes ? options.xaxis : options.yaxis
|
||
|
|
),
|
||
|
|
};
|
||
|
|
|
||
|
|
return axes[number - 1];
|
||
|
|
}
|
||
|
|
|
||
|
|
function fillInSeriesOptions() {
|
||
|
|
var 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) {
|
||
|
|
var 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() {
|
||
|
|
var topSentry = Number.POSITIVE_INFINITY,
|
||
|
|
bottomSentry = Number.NEGATIVE_INFINITY,
|
||
|
|
fakeInfinity = Number.MAX_VALUE,
|
||
|
|
i,
|
||
|
|
j,
|
||
|
|
k,
|
||
|
|
m,
|
||
|
|
length,
|
||
|
|
s,
|
||
|
|
points,
|
||
|
|
ps,
|
||
|
|
x,
|
||
|
|
y,
|
||
|
|
axis,
|
||
|
|
val,
|
||
|
|
f,
|
||
|
|
p,
|
||
|
|
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.bars.show || (s.lines.show && s.lines.fill)) {
|
||
|
|
var 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;
|
||
|
|
|
||
|
|
var insertSteps = s.lines.show && s.lines.steps;
|
||
|
|
s.xaxis.used = s.yaxis.used = true;
|
||
|
|
|
||
|
|
for (j = k = 0; j < data.length; ++j, k += ps) {
|
||
|
|
p = data[j];
|
||
|
|
|
||
|
|
var nullify = p == null;
|
||
|
|
if (!nullify) {
|
||
|
|
for (m = 0; m < ps; ++m) {
|
||
|
|
val = p[m];
|
||
|
|
f = format[m];
|
||
|
|
|
||
|
|
if (f) {
|
||
|
|
if (f.number && val != null) {
|
||
|
|
val = +val; // convert to number
|
||
|
|
if (isNaN(val)) val = null;
|
||
|
|
else if (val == Infinity) val = fakeInfinity;
|
||
|
|
else if (val == -Infinity) val = -fakeInfinity;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (val == null) {
|
||
|
|
if (f.required) nullify = true;
|
||
|
|
|
||
|
|
if (f.defaultValue != null) val = f.defaultValue;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
points[k + m] = val;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (nullify) {
|
||
|
|
for (m = 0; m < ps; ++m) {
|
||
|
|
val = points[k + m];
|
||
|
|
if (val != null) {
|
||
|
|
f = format[m];
|
||
|
|
// extract min/max info
|
||
|
|
if (f.x) updateAxis(s.xaxis, val, val);
|
||
|
|
if (f.y) updateAxis(s.yaxis, val, val);
|
||
|
|
}
|
||
|
|
points[k + m] = null;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
// a little bit of line specific stuff that
|
||
|
|
// perhaps shouldn't be here, but lacking
|
||
|
|
// better means...
|
||
|
|
if (
|
||
|
|
insertSteps &&
|
||
|
|
k > 0 &&
|
||
|
|
points[k - ps] != null &&
|
||
|
|
points[k - ps] != points[k] &&
|
||
|
|
points[k - ps + 1] != points[k + 1]
|
||
|
|
) {
|
||
|
|
// copy the point to make room for a middle point
|
||
|
|
for (m = 0; m < ps; ++m) points[k + ps + m] = points[k + m];
|
||
|
|
|
||
|
|
// middle point has same y
|
||
|
|
points[k + 1] = points[k - ps + 1];
|
||
|
|
|
||
|
|
// we've added a point, better reflect that
|
||
|
|
k += ps;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// give the hooks a chance to run
|
||
|
|
for (i = 0; i < series.length; ++i) {
|
||
|
|
s = series[i];
|
||
|
|
|
||
|
|
executeHooks(hooks.processDatapoints, [s, s.datapoints]);
|
||
|
|
}
|
||
|
|
|
||
|
|
// second pass: find datamax/datamin for auto-scaling
|
||
|
|
for (i = 0; i < series.length; ++i) {
|
||
|
|
s = series[i];
|
||
|
|
(points = s.datapoints.points), (ps = s.datapoints.pointsize);
|
||
|
|
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;
|
||
|
|
case "center":
|
||
|
|
delta = -s.bars.barWidth / 2;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
throw new Error("Invalid bar alignment: " + s.bars.align);
|
||
|
|
}
|
||
|
|
|
||
|
|
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;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
//////////////////////////////////////////////////////////////////////////////////
|
||
|
|
// Returns the display's ratio between physical and device-independent pixels.
|
||
|
|
//
|
||
|
|
// This is the ratio between the width that the browser advertises and the number
|
||
|
|
// of pixels actually available in that space. The iPhone 4, for example, has a
|
||
|
|
// device-independent width of 320px, but its screen is actually 640px wide. It
|
||
|
|
// therefore has a pixel ratio of 2, while most normal devices have a ratio of 1.
|
||
|
|
|
||
|
|
function getPixelRatio(cctx) {
|
||
|
|
var devicePixelRatio = window.devicePixelRatio || 1;
|
||
|
|
var backingStoreRatio =
|
||
|
|
cctx.webkitBackingStorePixelRatio ||
|
||
|
|
cctx.mozBackingStorePixelRatio ||
|
||
|
|
cctx.msBackingStorePixelRatio ||
|
||
|
|
cctx.oBackingStorePixelRatio ||
|
||
|
|
cctx.backingStorePixelRatio ||
|
||
|
|
1;
|
||
|
|
|
||
|
|
return devicePixelRatio / backingStoreRatio;
|
||
|
|
}
|
||
|
|
|
||
|
|
function makeCanvas(cls) {
|
||
|
|
var c = document.createElement("canvas");
|
||
|
|
c.className = cls;
|
||
|
|
|
||
|
|
$(c)
|
||
|
|
.css({ direction: "ltr", position: "absolute", left: 0, top: 0 })
|
||
|
|
.appendTo(placeholder);
|
||
|
|
|
||
|
|
// If HTML5 Canvas isn't available, fall back to Excanvas
|
||
|
|
|
||
|
|
if (!c.getContext) {
|
||
|
|
if (window.G_vmlCanvasManager) {
|
||
|
|
c = window.G_vmlCanvasManager.initElement(c);
|
||
|
|
} else {
|
||
|
|
throw new Error(
|
||
|
|
"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."
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var cctx = c.getContext("2d");
|
||
|
|
|
||
|
|
// Increase the canvas density based on the display's pixel ratio; basically
|
||
|
|
// giving the canvas more pixels without increasing the size of its element,
|
||
|
|
// to take advantage of the fact that retina displays have that many more
|
||
|
|
// pixels than they actually use for page & element widths.
|
||
|
|
|
||
|
|
var pixelRatio = getPixelRatio(cctx);
|
||
|
|
|
||
|
|
c.width = canvasWidth * pixelRatio;
|
||
|
|
c.height = canvasHeight * pixelRatio;
|
||
|
|
c.style.width = canvasWidth + "px";
|
||
|
|
c.style.height = canvasHeight + "px";
|
||
|
|
|
||
|
|
// Save the context so we can reset in case we get replotted
|
||
|
|
|
||
|
|
cctx.save();
|
||
|
|
|
||
|
|
// Scale the coordinate space to match the display density; so even though we
|
||
|
|
// may have twice as many pixels, we still want lines and other drawing to
|
||
|
|
// appear at the same size; the extra pixels will just make them crisper.
|
||
|
|
|
||
|
|
cctx.scale(pixelRatio, pixelRatio);
|
||
|
|
|
||
|
|
return c;
|
||
|
|
}
|
||
|
|
|
||
|
|
function getCanvasDimensions() {
|
||
|
|
canvasWidth = placeholder.width();
|
||
|
|
canvasHeight = placeholder.height();
|
||
|
|
|
||
|
|
if (canvasWidth <= 0 || canvasHeight <= 0)
|
||
|
|
throw new Error(
|
||
|
|
"Invalid dimensions for plot, width = " +
|
||
|
|
canvasWidth +
|
||
|
|
", height = " +
|
||
|
|
canvasHeight
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
function resizeCanvas(c) {
|
||
|
|
var cctx = c.getContext("2d");
|
||
|
|
|
||
|
|
// Handle pixel ratios > 1 for retina displays, as explained in makeCanvas
|
||
|
|
|
||
|
|
var pixelRatio = getPixelRatio(cctx);
|
||
|
|
|
||
|
|
// Resizing should reset the state (excanvas seems to be buggy though)
|
||
|
|
|
||
|
|
if (c.style.width != canvasWidth) {
|
||
|
|
c.width = canvasWidth * pixelRatio;
|
||
|
|
c.style.width = canvasWidth + "px";
|
||
|
|
}
|
||
|
|
|
||
|
|
if (c.style.height != canvasHeight) {
|
||
|
|
c.height = canvasHeight * pixelRatio;
|
||
|
|
c.style.height = canvasHeight + "px";
|
||
|
|
}
|
||
|
|
|
||
|
|
// so try to get back to the initial state (even if it's
|
||
|
|
// gone now, this should be safe according to the spec)
|
||
|
|
cctx.restore();
|
||
|
|
|
||
|
|
// and save again
|
||
|
|
cctx.save();
|
||
|
|
|
||
|
|
// Apply scaling for retina displays, as explained in makeCanvas
|
||
|
|
|
||
|
|
cctx.scale(pixelRatio, pixelRatio);
|
||
|
|
}
|
||
|
|
|
||
|
|
function setupCanvases() {
|
||
|
|
var reused,
|
||
|
|
existingCanvas = placeholder.children("canvas.flot-base"),
|
||
|
|
existingOverlay = placeholder.children("canvas.flot-overlay");
|
||
|
|
|
||
|
|
if (existingCanvas.length == 0 || existingOverlay == 0) {
|
||
|
|
// init everything
|
||
|
|
|
||
|
|
placeholder.html(""); // make sure placeholder is clear
|
||
|
|
|
||
|
|
placeholder.css({ padding: 0 }); // padding messes up the positioning
|
||
|
|
|
||
|
|
if (placeholder.css("position") == "static")
|
||
|
|
placeholder.css("position", "relative"); // for positioning labels and overlay
|
||
|
|
|
||
|
|
getCanvasDimensions();
|
||
|
|
|
||
|
|
canvas = makeCanvas("flot-base");
|
||
|
|
overlay = makeCanvas("flot-overlay"); // overlay canvas for interactive features
|
||
|
|
|
||
|
|
reused = false;
|
||
|
|
} else {
|
||
|
|
// reuse existing elements
|
||
|
|
|
||
|
|
canvas = existingCanvas.get(0);
|
||
|
|
overlay = existingOverlay.get(0);
|
||
|
|
|
||
|
|
reused = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
ctx = canvas.getContext("2d");
|
||
|
|
octx = overlay.getContext("2d");
|
||
|
|
|
||
|
|
// define which element we're listening for events on
|
||
|
|
eventHolder = $(overlay);
|
||
|
|
|
||
|
|
if (reused) {
|
||
|
|
// run shutdown in the old plot object
|
||
|
|
placeholder.data("plot").shutdown();
|
||
|
|
|
||
|
|
// reset reused canvases
|
||
|
|
plot.resize();
|
||
|
|
|
||
|
|
// make sure overlay pixels are cleared (canvas is cleared when we redraw)
|
||
|
|
octx.clearRect(0, 0, canvasWidth, canvasHeight);
|
||
|
|
|
||
|
|
// then whack any remaining obvious garbage left
|
||
|
|
eventHolder.unbind();
|
||
|
|
placeholder.children().not([canvas, overlay]).remove();
|
||
|
|
}
|
||
|
|
|
||
|
|
// save in case we get replotted
|
||
|
|
placeholder.data("plot", plot);
|
||
|
|
}
|
||
|
|
|
||
|
|
function bindEvents() {
|
||
|
|
// bind events
|
||
|
|
if (options.grid.hoverable) {
|
||
|
|
eventHolder.mousemove(onMouseMove);
|
||
|
|
|
||
|
|
// 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) {
|
||
|
|
var opts = axis.options,
|
||
|
|
ticks = axis.ticks || [],
|
||
|
|
axisw = opts.labelWidth || 0,
|
||
|
|
axish = opts.labelHeight || 0,
|
||
|
|
f = axis.font;
|
||
|
|
|
||
|
|
ctx.save();
|
||
|
|
ctx.font =
|
||
|
|
f.style +
|
||
|
|
" " +
|
||
|
|
f.variant +
|
||
|
|
" " +
|
||
|
|
f.weight +
|
||
|
|
" " +
|
||
|
|
f.size +
|
||
|
|
"px '" +
|
||
|
|
f.family +
|
||
|
|
"'";
|
||
|
|
|
||
|
|
for (var i = 0; i < ticks.length; ++i) {
|
||
|
|
var t = ticks[i];
|
||
|
|
|
||
|
|
t.lines = [];
|
||
|
|
t.width = t.height = 0;
|
||
|
|
|
||
|
|
if (!t.label) continue;
|
||
|
|
|
||
|
|
// accept various kinds of newlines, including HTML ones
|
||
|
|
// (you can actually split directly on regexps in Javascript,
|
||
|
|
// but IE < 9 is unfortunately broken)
|
||
|
|
var lines = (t.label + "")
|
||
|
|
.replace(/<br ?\/?>|\r\n|\r/g, "\n")
|
||
|
|
.split("\n");
|
||
|
|
for (var j = 0; j < lines.length; ++j) {
|
||
|
|
var line = { text: lines[j] },
|
||
|
|
m = ctx.measureText(line.text);
|
||
|
|
|
||
|
|
line.width = m.width;
|
||
|
|
// m.height might not be defined, not in the
|
||
|
|
// standard yet
|
||
|
|
line.height = m.height != null ? m.height : f.size;
|
||
|
|
|
||
|
|
// add a bit of margin since font rendering is
|
||
|
|
// not pixel perfect and cut off letters look
|
||
|
|
// bad, this also doubles as spacing between
|
||
|
|
// lines
|
||
|
|
line.height += Math.round(f.size * 0.15);
|
||
|
|
|
||
|
|
t.width = Math.max(line.width, t.width);
|
||
|
|
t.height += line.height;
|
||
|
|
|
||
|
|
t.lines.push(line);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (opts.labelWidth == null) axisw = Math.max(axisw, t.width);
|
||
|
|
if (opts.labelHeight == null) axish = Math.max(axish, t.height);
|
||
|
|
}
|
||
|
|
ctx.restore();
|
||
|
|
|
||
|
|
axis.labelWidth = Math.ceil(axisw);
|
||
|
|
axis.labelHeight = Math.ceil(axish);
|
||
|
|
}
|
||
|
|
|
||
|
|
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
|
||
|
|
|
||
|
|
var lw = axis.labelWidth,
|
||
|
|
lh = axis.labelHeight,
|
||
|
|
pos = axis.options.position,
|
||
|
|
tickLength = axis.options.tickLength,
|
||
|
|
axisMargin = options.grid.axisMargin,
|
||
|
|
padding = options.grid.labelMargin,
|
||
|
|
all = axis.direction == "x" ? xaxes : yaxes,
|
||
|
|
index,
|
||
|
|
innermost;
|
||
|
|
|
||
|
|
// determine axis margin
|
||
|
|
var samePosition = $.grep(all, function (a) {
|
||
|
|
return a && a.options.position == pos && a.reserveSpace;
|
||
|
|
});
|
||
|
|
if ($.inArray(axis, samePosition) == samePosition.length - 1)
|
||
|
|
axisMargin = 0; // outermost
|
||
|
|
|
||
|
|
// determine tick length - if we're innermost, we can use "full"
|
||
|
|
if (tickLength == null) {
|
||
|
|
var sameDirection = $.grep(all, function (a) {
|
||
|
|
return a && a.reserveSpace;
|
||
|
|
});
|
||
|
|
|
||
|
|
innermost = $.inArray(axis, sameDirection) == 0;
|
||
|
|
if (innermost) tickLength = "full";
|
||
|
|
else tickLength = 5;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!isNaN(+tickLength)) padding += +tickLength;
|
||
|
|
|
||
|
|
// compute box
|
||
|
|
if (axis.direction == "x") {
|
||
|
|
lh += padding;
|
||
|
|
|
||
|
|
if (pos == "bottom") {
|
||
|
|
plotOffset.bottom += lh + axisMargin;
|
||
|
|
axis.box = { top: canvasHeight - plotOffset.bottom, height: lh };
|
||
|
|
} else {
|
||
|
|
axis.box = { top: plotOffset.top + axisMargin, height: lh };
|
||
|
|
plotOffset.top += lh + axisMargin;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
lw += padding;
|
||
|
|
|
||
|
|
if (pos == "left") {
|
||
|
|
axis.box = { left: plotOffset.left + axisMargin, width: lw };
|
||
|
|
plotOffset.left += lw + axisMargin;
|
||
|
|
} else {
|
||
|
|
plotOffset.right += lw + axisMargin;
|
||
|
|
axis.box = { left: canvasWidth - plotOffset.right, width: lw };
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// save for future reference
|
||
|
|
axis.position = pos;
|
||
|
|
axis.tickLength = tickLength;
|
||
|
|
axis.box.padding = padding;
|
||
|
|
axis.innermost = innermost;
|
||
|
|
}
|
||
|
|
|
||
|
|
function allocateAxisBoxSecondPhase(axis) {
|
||
|
|
// 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 =
|
||
|
|
canvasWidth - plotOffset.left - plotOffset.right + axis.labelWidth;
|
||
|
|
} else {
|
||
|
|
axis.box.top = plotOffset.top - axis.labelHeight / 2;
|
||
|
|
axis.box.height =
|
||
|
|
canvasHeight - plotOffset.bottom - plotOffset.top + axis.labelHeight;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function adjustLayoutForThingsStickingOut() {
|
||
|
|
// possibly adjust plot offset to ensure everything stays
|
||
|
|
// inside the canvas and isn't clipped off
|
||
|
|
|
||
|
|
var minMargin = options.grid.minBorderMargin,
|
||
|
|
margins = { x: 0, y: 0 },
|
||
|
|
i,
|
||
|
|
axis;
|
||
|
|
|
||
|
|
// 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)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
margins.x = margins.y = Math.ceil(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) {
|
||
|
|
var dir = axis.direction;
|
||
|
|
if (axis.reserveSpace)
|
||
|
|
margins[dir] = Math.ceil(
|
||
|
|
Math.max(
|
||
|
|
margins[dir],
|
||
|
|
(dir == "x" ? axis.labelWidth : axis.labelHeight) / 2
|
||
|
|
)
|
||
|
|
);
|
||
|
|
});
|
||
|
|
|
||
|
|
plotOffset.left = Math.max(margins.x, plotOffset.left);
|
||
|
|
plotOffset.right = Math.max(margins.x, plotOffset.right);
|
||
|
|
plotOffset.top = Math.max(margins.y, plotOffset.top);
|
||
|
|
plotOffset.bottom = Math.max(margins.y, 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) {
|
||
|
|
var 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;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// init axes
|
||
|
|
$.each(axes, function (_, axis) {
|
||
|
|
axis.show = axis.options.show;
|
||
|
|
if (axis.show == null) axis.show = axis.used; // by default an axis is visible if it's got data
|
||
|
|
|
||
|
|
axis.reserveSpace = axis.show || axis.options.reserveSpace;
|
||
|
|
|
||
|
|
setRange(axis);
|
||
|
|
});
|
||
|
|
|
||
|
|
if (showGrid) {
|
||
|
|
// determine from the placeholder the font size ~ height of font ~ 1 em
|
||
|
|
var fontDefaults = {
|
||
|
|
style: placeholder.css("font-style"),
|
||
|
|
size: Math.round(
|
||
|
|
0.8 * (+placeholder.css("font-size").replace("px", "") || 13)
|
||
|
|
),
|
||
|
|
variant: placeholder.css("font-variant"),
|
||
|
|
weight: placeholder.css("font-weight"),
|
||
|
|
family: placeholder.css("font-family"),
|
||
|
|
};
|
||
|
|
|
||
|
|
var allocatedAxes = $.grep(axes, function (axis) {
|
||
|
|
return axis.reserveSpace;
|
||
|
|
});
|
||
|
|
|
||
|
|
$.each(allocatedAxes, function (_, axis) {
|
||
|
|
// make the ticks
|
||
|
|
setupTickGeneration(axis);
|
||
|
|
setTicks(axis);
|
||
|
|
snapRangeToTicks(axis, axis.ticks);
|
||
|
|
|
||
|
|
// find labelWidth/Height for axis
|
||
|
|
axis.font = $.extend({}, fontDefaults, axis.options.font);
|
||
|
|
measureTickLabels(axis);
|
||
|
|
});
|
||
|
|
|
||
|
|
// 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 = canvasWidth - plotOffset.left - plotOffset.right;
|
||
|
|
plotHeight = canvasHeight - plotOffset.bottom - plotOffset.top;
|
||
|
|
|
||
|
|
// now we got the proper plot dimensions, we can compute the scaling
|
||
|
|
$.each(axes, function (_, axis) {
|
||
|
|
setTransformationHelpers(axis);
|
||
|
|
});
|
||
|
|
|
||
|
|
insertLegend();
|
||
|
|
}
|
||
|
|
|
||
|
|
function setRange(axis) {
|
||
|
|
var opts = axis.options,
|
||
|
|
min = +(opts.min != null ? opts.min : axis.datamin),
|
||
|
|
max = +(opts.max != null ? opts.max : axis.datamax),
|
||
|
|
delta = max - min;
|
||
|
|
|
||
|
|
if (delta == 0.0) {
|
||
|
|
// degenerate case
|
||
|
|
var widen = max == 0 ? 1 : 0.01;
|
||
|
|
|
||
|
|
if (opts.min == null) min -= widen;
|
||
|
|
// always widen max if we couldn't widen min to ensure we
|
||
|
|
// don't fall into min == max which doesn't work
|
||
|
|
if (opts.max == null || opts.min != null) max += widen;
|
||
|
|
} else {
|
||
|
|
// consider autoscaling
|
||
|
|
var margin = opts.autoscaleMargin;
|
||
|
|
if (margin != null) {
|
||
|
|
if (opts.min == null) {
|
||
|
|
min -= delta * margin;
|
||
|
|
// make sure we don't go below zero if all values
|
||
|
|
// are positive
|
||
|
|
if (min < 0 && axis.datamin != null && axis.datamin >= 0) min = 0;
|
||
|
|
}
|
||
|
|
if (opts.max == null) {
|
||
|
|
max += delta * margin;
|
||
|
|
if (max > 0 && axis.datamax != null && axis.datamax <= 0) max = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
axis.min = min;
|
||
|
|
axis.max = max;
|
||
|
|
}
|
||
|
|
|
||
|
|
function setupTickGeneration(axis) {
|
||
|
|
var opts = axis.options;
|
||
|
|
|
||
|
|
// estimate number of ticks
|
||
|
|
var noTicks;
|
||
|
|
if (typeof opts.ticks == "number" && opts.ticks > 0) noTicks = opts.ticks;
|
||
|
|
// 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" ? canvasWidth : canvasHeight);
|
||
|
|
|
||
|
|
axis.delta = (axis.max - axis.min) / noTicks;
|
||
|
|
|
||
|
|
// Time mode was moved to a plug-in in 0.8, but since so many people use this
|
||
|
|
// we'll add an especially friendly make sure they remembered to include 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) {
|
||
|
|
var maxDec = opts.tickDecimals,
|
||
|
|
dec = -Math.floor(Math.log(axis.delta) / Math.LN10);
|
||
|
|
|
||
|
|
if (maxDec != null && dec > maxDec) dec = maxDec;
|
||
|
|
|
||
|
|
var magn = Math.pow(10, -dec),
|
||
|
|
norm = axis.delta / magn, // norm is between 1.0 and 10.0
|
||
|
|
size,
|
||
|
|
ticks = [],
|
||
|
|
start,
|
||
|
|
i = 0,
|
||
|
|
v = Number.NaN,
|
||
|
|
prev;
|
||
|
|
|
||
|
|
if (norm < 1.5) size = 1;
|
||
|
|
else if (norm < 3) {
|
||
|
|
size = 2;
|
||
|
|
// special case for 2.5, requires an extra decimal
|
||
|
|
if (norm > 2.25 && (maxDec == null || dec + 1 <= maxDec)) {
|
||
|
|
size = 2.5;
|
||
|
|
++dec;
|
||
|
|
}
|
||
|
|
} else if (norm < 7.5) size = 5;
|
||
|
|
else size = 10;
|
||
|
|
|
||
|
|
size *= magn;
|
||
|
|
|
||
|
|
if (opts.minTickSize != null && size < opts.minTickSize)
|
||
|
|
size = opts.minTickSize;
|
||
|
|
|
||
|
|
axis.tickDecimals = Math.max(0, maxDec != null ? maxDec : dec);
|
||
|
|
axis.tickSize = opts.tickSize || size;
|
||
|
|
|
||
|
|
start = floorInBase(axis.min, axis.tickSize);
|
||
|
|
|
||
|
|
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) {
|
||
|
|
var 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(".");
|
||
|
|
var 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
|
||
|
|
var 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) {
|
||
|
|
var 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
|
||
|
|
var i, v;
|
||
|
|
axis.ticks = [];
|
||
|
|
for (i = 0; i < ticks.length; ++i) {
|
||
|
|
var label = null;
|
||
|
|
var t = ticks[i];
|
||
|
|
if (typeof t == "object") {
|
||
|
|
v = +t[0];
|
||
|
|
if (t.length > 1) label = t[1];
|
||
|
|
} else v = +t;
|
||
|
|
if (label == null) label = axis.tickFormatter(v, axis);
|
||
|
|
if (!isNaN(v)) axis.ticks.push({ v: v, label: label });
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function snapRangeToTicks(axis, ticks) {
|
||
|
|
if (axis.options.autoscaleMargin && ticks.length > 0) {
|
||
|
|
// snap to ticks
|
||
|
|
if (axis.options.min == null) axis.min = Math.min(axis.min, ticks[0].v);
|
||
|
|
if (axis.options.max == null && ticks.length > 1)
|
||
|
|
axis.max = Math.max(axis.max, ticks[ticks.length - 1].v);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function draw() {
|
||
|
|
ctx.clearRect(0, 0, canvasWidth, canvasHeight);
|
||
|
|
|
||
|
|
executeHooks(hooks.drawBackground, [ctx]);
|
||
|
|
|
||
|
|
var grid = options.grid;
|
||
|
|
|
||
|
|
// draw background, if any
|
||
|
|
if (grid.show && grid.backgroundColor) drawBackground();
|
||
|
|
|
||
|
|
if (grid.show && !grid.aboveData) {
|
||
|
|
drawGrid();
|
||
|
|
drawAxisLabels();
|
||
|
|
}
|
||
|
|
|
||
|
|
for (var i = 0; i < series.length; ++i) {
|
||
|
|
executeHooks(hooks.drawSeries, [ctx, series[i]]);
|
||
|
|
drawSeries(series[i]);
|
||
|
|
}
|
||
|
|
|
||
|
|
executeHooks(hooks.draw, [ctx]);
|
||
|
|
|
||
|
|
if (grid.show && grid.aboveData) {
|
||
|
|
drawGrid();
|
||
|
|
drawAxisLabels();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function extractRange(ranges, coord) {
|
||
|
|
var axis,
|
||
|
|
from,
|
||
|
|
to,
|
||
|
|
key,
|
||
|
|
axes = allAxes();
|
||
|
|
|
||
|
|
for (var i = 0; i < axes.length; ++i) {
|
||
|
|
axis = axes[i];
|
||
|
|
if (axis.direction == coord) {
|
||
|
|
key = coord + axis.n + "axis";
|
||
|
|
if (!ranges[key] && axis.n == 1) key = coord + "axis"; // support x1axis as xaxis
|
||
|
|
if (ranges[key]) {
|
||
|
|
from = ranges[key].from;
|
||
|
|
to = ranges[key].to;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// backwards-compat stuff - to be removed in future
|
||
|
|
if (!ranges[key]) {
|
||
|
|
axis = coord == "x" ? xaxes[0] : yaxes[0];
|
||
|
|
from = ranges[coord + "1"];
|
||
|
|
to = ranges[coord + "2"];
|
||
|
|
}
|
||
|
|
|
||
|
|
// auto-reverse as an added bonus
|
||
|
|
if (from != null && to != null && from > to) {
|
||
|
|
var tmp = from;
|
||
|
|
from = to;
|
||
|
|
to = tmp;
|
||
|
|
}
|
||
|
|
|
||
|
|
return { from: from, to: to, axis: axis };
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawBackground() {
|
||
|
|
ctx.save();
|
||
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
||
|
|
|
||
|
|
ctx.fillStyle = getColorOrGradient(
|
||
|
|
options.grid.backgroundColor,
|
||
|
|
plotHeight,
|
||
|
|
0,
|
||
|
|
"rgba(255, 255, 255, 0)"
|
||
|
|
);
|
||
|
|
ctx.fillRect(0, 0, plotWidth, plotHeight);
|
||
|
|
ctx.restore();
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawGrid() {
|
||
|
|
var i, axes, bw, bc;
|
||
|
|
|
||
|
|
ctx.save();
|
||
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
||
|
|
|
||
|
|
// draw markings
|
||
|
|
var 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) {
|
||
|
|
var m = markings[i],
|
||
|
|
xrange = extractRange(m, "x"),
|
||
|
|
yrange = extractRange(m, "y");
|
||
|
|
|
||
|
|
// fill in missing
|
||
|
|
if (xrange.from == null) xrange.from = xrange.axis.min;
|
||
|
|
if (xrange.to == null) xrange.to = xrange.axis.max;
|
||
|
|
if (yrange.from == null) yrange.from = yrange.axis.min;
|
||
|
|
if (yrange.to == null) yrange.to = yrange.axis.max;
|
||
|
|
|
||
|
|
// clip
|
||
|
|
if (
|
||
|
|
xrange.to < xrange.axis.min ||
|
||
|
|
xrange.from > xrange.axis.max ||
|
||
|
|
yrange.to < yrange.axis.min ||
|
||
|
|
yrange.from > yrange.axis.max
|
||
|
|
)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
xrange.from = Math.max(xrange.from, xrange.axis.min);
|
||
|
|
xrange.to = Math.min(xrange.to, xrange.axis.max);
|
||
|
|
yrange.from = Math.max(yrange.from, yrange.axis.min);
|
||
|
|
yrange.to = Math.min(yrange.to, yrange.axis.max);
|
||
|
|
|
||
|
|
if (xrange.from == xrange.to && yrange.from == yrange.to) continue;
|
||
|
|
|
||
|
|
// then draw
|
||
|
|
xrange.from = xrange.axis.p2c(xrange.from);
|
||
|
|
xrange.to = xrange.axis.p2c(xrange.to);
|
||
|
|
yrange.from = yrange.axis.p2c(yrange.from);
|
||
|
|
yrange.to = yrange.axis.p2c(yrange.to);
|
||
|
|
|
||
|
|
if (xrange.from == xrange.to || yrange.from == yrange.to) {
|
||
|
|
// draw line
|
||
|
|
ctx.beginPath();
|
||
|
|
ctx.strokeStyle = m.color || options.grid.markingsColor;
|
||
|
|
ctx.lineWidth = m.lineWidth || options.grid.markingsLineWidth;
|
||
|
|
ctx.moveTo(xrange.from, yrange.from);
|
||
|
|
ctx.lineTo(xrange.to, yrange.to);
|
||
|
|
ctx.stroke();
|
||
|
|
} else {
|
||
|
|
// fill area
|
||
|
|
ctx.fillStyle = m.color || options.grid.markingsColor;
|
||
|
|
ctx.fillRect(
|
||
|
|
xrange.from,
|
||
|
|
yrange.to,
|
||
|
|
xrange.to - xrange.from,
|
||
|
|
yrange.from - yrange.to
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// draw the ticks
|
||
|
|
axes = allAxes();
|
||
|
|
bw = options.grid.borderWidth;
|
||
|
|
|
||
|
|
for (var j = 0; j < axes.length; ++j) {
|
||
|
|
var axis = axes[j],
|
||
|
|
box = axis.box,
|
||
|
|
t = axis.tickLength,
|
||
|
|
x,
|
||
|
|
y,
|
||
|
|
xoff,
|
||
|
|
yoff;
|
||
|
|
if (!axis.show || axis.ticks.length == 0) continue;
|
||
|
|
|
||
|
|
ctx.strokeStyle =
|
||
|
|
axis.options.tickColor ||
|
||
|
|
$.color.parse(axis.options.color).scale("a", 0.22).toString();
|
||
|
|
ctx.lineWidth = 1;
|
||
|
|
|
||
|
|
// find the edges
|
||
|
|
if (axis.direction == "x") {
|
||
|
|
x = 0;
|
||
|
|
if (t == "full") y = axis.position == "top" ? 0 : plotHeight;
|
||
|
|
else
|
||
|
|
y =
|
||
|
|
box.top -
|
||
|
|
plotOffset.top +
|
||
|
|
(axis.position == "top" ? box.height : 0);
|
||
|
|
} else {
|
||
|
|
y = 0;
|
||
|
|
if (t == "full") x = axis.position == "left" ? 0 : plotWidth;
|
||
|
|
else
|
||
|
|
x =
|
||
|
|
box.left -
|
||
|
|
plotOffset.left +
|
||
|
|
(axis.position == "left" ? box.width : 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
// draw tick bar
|
||
|
|
if (!axis.innermost) {
|
||
|
|
ctx.beginPath();
|
||
|
|
xoff = yoff = 0;
|
||
|
|
if (axis.direction == "x") xoff = plotWidth;
|
||
|
|
else yoff = plotHeight;
|
||
|
|
|
||
|
|
if (ctx.lineWidth == 1) {
|
||
|
|
x = Math.floor(x) + 0.5;
|
||
|
|
y = Math.floor(y) + 0.5;
|
||
|
|
}
|
||
|
|
|
||
|
|
ctx.moveTo(x, y);
|
||
|
|
ctx.lineTo(x + xoff, y + yoff);
|
||
|
|
ctx.stroke();
|
||
|
|
}
|
||
|
|
|
||
|
|
// draw ticks
|
||
|
|
ctx.beginPath();
|
||
|
|
for (i = 0; i < axis.ticks.length; ++i) {
|
||
|
|
var v = axis.ticks[i].v;
|
||
|
|
|
||
|
|
xoff = yoff = 0;
|
||
|
|
|
||
|
|
if (
|
||
|
|
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() {
|
||
|
|
ctx.save();
|
||
|
|
|
||
|
|
$.each(allAxes(), function (_, axis) {
|
||
|
|
if (!axis.show || axis.ticks.length == 0) return;
|
||
|
|
|
||
|
|
var box = axis.box,
|
||
|
|
f = axis.font;
|
||
|
|
// placeholder.append('<div style="position:absolute;opacity:0.10;background-color:red;left:' + box.left + 'px;top:' + box.top + 'px;width:' + box.width + 'px;height:' + box.height + 'px"></div>') // debug
|
||
|
|
|
||
|
|
ctx.fillStyle = axis.options.color;
|
||
|
|
// Important: Don't use quotes around axis.font.family! Just around single
|
||
|
|
// font names like 'Times New Roman' that have a space or special character in it.
|
||
|
|
ctx.font =
|
||
|
|
f.style +
|
||
|
|
" " +
|
||
|
|
f.variant +
|
||
|
|
" " +
|
||
|
|
f.weight +
|
||
|
|
" " +
|
||
|
|
f.size +
|
||
|
|
"px " +
|
||
|
|
f.family;
|
||
|
|
ctx.textAlign = "start";
|
||
|
|
// middle align the labels - top would be more
|
||
|
|
// natural, but browsers can differ a pixel or two in
|
||
|
|
// where they consider the top to be, so instead we
|
||
|
|
// middle align to minimize variation between browsers
|
||
|
|
// and compensate when calculating the coordinates
|
||
|
|
ctx.textBaseline = "middle";
|
||
|
|
|
||
|
|
for (var i = 0; i < axis.ticks.length; ++i) {
|
||
|
|
var tick = axis.ticks[i];
|
||
|
|
if (!tick.label || tick.v < axis.min || tick.v > axis.max) continue;
|
||
|
|
|
||
|
|
var x,
|
||
|
|
y,
|
||
|
|
offset = 0,
|
||
|
|
line;
|
||
|
|
for (var k = 0; k < tick.lines.length; ++k) {
|
||
|
|
line = tick.lines[k];
|
||
|
|
|
||
|
|
if (axis.direction == "x") {
|
||
|
|
x = plotOffset.left + axis.p2c(tick.v) - line.width / 2;
|
||
|
|
if (axis.position == "bottom") y = box.top + box.padding;
|
||
|
|
else y = box.top + box.height - box.padding - tick.height;
|
||
|
|
} else {
|
||
|
|
y = plotOffset.top + axis.p2c(tick.v) - tick.height / 2;
|
||
|
|
if (axis.position == "left")
|
||
|
|
x = box.left + box.width - box.padding - line.width;
|
||
|
|
else x = box.left + box.padding;
|
||
|
|
}
|
||
|
|
|
||
|
|
// account for middle aligning and line number
|
||
|
|
y += line.height / 2 + offset;
|
||
|
|
offset += line.height;
|
||
|
|
|
||
|
|
if (!!(window.opera && window.opera.version().split(".")[0] < 12)) {
|
||
|
|
// FIXME: LEGACY BROWSER FIX
|
||
|
|
// AFFECTS: Opera < 12.00
|
||
|
|
|
||
|
|
// round the coordinates since Opera
|
||
|
|
// otherwise switches to more ugly
|
||
|
|
// rendering (probably non-hinted) and
|
||
|
|
// offset the y coordinates since it seems
|
||
|
|
// to be off pretty consistently compared
|
||
|
|
// to the other browsers
|
||
|
|
x = Math.floor(x);
|
||
|
|
y = Math.ceil(y - 2);
|
||
|
|
}
|
||
|
|
ctx.fillText(line.text, x, y);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
ctx.restore();
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawSeries(series) {
|
||
|
|
if (series.lines.show) drawSeriesLines(series);
|
||
|
|
if (series.bars.show) drawSeriesBars(series);
|
||
|
|
if (series.points.show) drawSeriesPoints(series);
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawSeriesLines(series) {
|
||
|
|
function plotLine(datapoints, xoffset, yoffset, axisx, axisy) {
|
||
|
|
var points = datapoints.points,
|
||
|
|
ps = datapoints.pointsize,
|
||
|
|
prevx = null,
|
||
|
|
prevy = null;
|
||
|
|
|
||
|
|
ctx.beginPath();
|
||
|
|
for (var i = ps; i < points.length; i += ps) {
|
||
|
|
var x1 = points[i - ps],
|
||
|
|
y1 = points[i - ps + 1],
|
||
|
|
x2 = points[i],
|
||
|
|
y2 = points[i + 1];
|
||
|
|
|
||
|
|
if (x1 == null || x2 == null) continue;
|
||
|
|
|
||
|
|
// clip with ymin
|
||
|
|
if (y1 <= y2 && y1 < axisy.min) {
|
||
|
|
if (y2 < axisy.min) continue; // line segment is outside
|
||
|
|
// compute new intersection point
|
||
|
|
x1 = ((axisy.min - y1) / (y2 - y1)) * (x2 - x1) + x1;
|
||
|
|
y1 = axisy.min;
|
||
|
|
} else if (y2 <= y1 && y2 < axisy.min) {
|
||
|
|
if (y1 < axisy.min) continue;
|
||
|
|
x2 = ((axisy.min - y1) / (y2 - y1)) * (x2 - x1) + x1;
|
||
|
|
y2 = axisy.min;
|
||
|
|
}
|
||
|
|
|
||
|
|
// clip with ymax
|
||
|
|
if (y1 >= y2 && y1 > axisy.max) {
|
||
|
|
if (y2 > axisy.max) continue;
|
||
|
|
x1 = ((axisy.max - y1) / (y2 - y1)) * (x2 - x1) + x1;
|
||
|
|
y1 = axisy.max;
|
||
|
|
} else if (y2 >= y1 && y2 > axisy.max) {
|
||
|
|
if (y1 > axisy.max) continue;
|
||
|
|
x2 = ((axisy.max - y1) / (y2 - y1)) * (x2 - x1) + x1;
|
||
|
|
y2 = axisy.max;
|
||
|
|
}
|
||
|
|
|
||
|
|
// clip with xmin
|
||
|
|
if (x1 <= x2 && x1 < axisx.min) {
|
||
|
|
if (x2 < axisx.min) continue;
|
||
|
|
y1 = ((axisx.min - x1) / (x2 - x1)) * (y2 - y1) + y1;
|
||
|
|
x1 = axisx.min;
|
||
|
|
} else if (x2 <= x1 && x2 < axisx.min) {
|
||
|
|
if (x1 < axisx.min) continue;
|
||
|
|
y2 = ((axisx.min - x1) / (x2 - x1)) * (y2 - y1) + y1;
|
||
|
|
x2 = axisx.min;
|
||
|
|
}
|
||
|
|
|
||
|
|
// clip with xmax
|
||
|
|
if (x1 >= x2 && x1 > axisx.max) {
|
||
|
|
if (x2 > axisx.max) continue;
|
||
|
|
y1 = ((axisx.max - x1) / (x2 - x1)) * (y2 - y1) + y1;
|
||
|
|
x1 = axisx.max;
|
||
|
|
} else if (x2 >= x1 && x2 > axisx.max) {
|
||
|
|
if (x1 > axisx.max) continue;
|
||
|
|
y2 = ((axisx.max - x1) / (x2 - x1)) * (y2 - y1) + y1;
|
||
|
|
x2 = axisx.max;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (x1 != prevx || y1 != prevy)
|
||
|
|
ctx.moveTo(axisx.p2c(x1) + xoffset, axisy.p2c(y1) + yoffset);
|
||
|
|
|
||
|
|
prevx = x2;
|
||
|
|
prevy = y2;
|
||
|
|
ctx.lineTo(axisx.p2c(x2) + xoffset, axisy.p2c(y2) + yoffset);
|
||
|
|
}
|
||
|
|
ctx.stroke();
|
||
|
|
}
|
||
|
|
|
||
|
|
function plotLineArea(datapoints, axisx, axisy) {
|
||
|
|
var points = datapoints.points,
|
||
|
|
ps = datapoints.pointsize,
|
||
|
|
bottom = Math.min(Math.max(0, axisy.min), axisy.max),
|
||
|
|
i = 0,
|
||
|
|
top,
|
||
|
|
areaOpen = false,
|
||
|
|
ypos = 1,
|
||
|
|
segmentStart = 0,
|
||
|
|
segmentEnd = 0;
|
||
|
|
|
||
|
|
// we process each segment in two turns, first forward
|
||
|
|
// direction to sketch out top, then once we hit the
|
||
|
|
// end we go backwards to sketch the bottom
|
||
|
|
while (true) {
|
||
|
|
if (ps > 0 && i > points.length + ps) break;
|
||
|
|
|
||
|
|
i += ps; // ps is negative if going backwards
|
||
|
|
|
||
|
|
var x1 = points[i - ps],
|
||
|
|
y1 = points[i - ps + ypos],
|
||
|
|
x2 = points[i],
|
||
|
|
y2 = points[i + ypos];
|
||
|
|
|
||
|
|
if (areaOpen) {
|
||
|
|
if (ps > 0 && x1 != null && x2 == null) {
|
||
|
|
// at turning point
|
||
|
|
segmentEnd = i;
|
||
|
|
ps = -ps;
|
||
|
|
ypos = 2;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ps < 0 && i == segmentStart + ps) {
|
||
|
|
// done with the reverse sweep
|
||
|
|
ctx.fill();
|
||
|
|
areaOpen = false;
|
||
|
|
ps = -ps;
|
||
|
|
ypos = 1;
|
||
|
|
i = segmentStart = segmentEnd + ps;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (x1 == null || x2 == null) continue;
|
||
|
|
|
||
|
|
// clip x values
|
||
|
|
|
||
|
|
// clip with xmin
|
||
|
|
if (x1 <= x2 && x1 < axisx.min) {
|
||
|
|
if (x2 < axisx.min) continue;
|
||
|
|
y1 = ((axisx.min - x1) / (x2 - x1)) * (y2 - y1) + y1;
|
||
|
|
x1 = axisx.min;
|
||
|
|
} else if (x2 <= x1 && x2 < axisx.min) {
|
||
|
|
if (x1 < axisx.min) continue;
|
||
|
|
y2 = ((axisx.min - x1) / (x2 - x1)) * (y2 - y1) + y1;
|
||
|
|
x2 = axisx.min;
|
||
|
|
}
|
||
|
|
|
||
|
|
// clip with xmax
|
||
|
|
if (x1 >= x2 && x1 > axisx.max) {
|
||
|
|
if (x2 > axisx.max) continue;
|
||
|
|
y1 = ((axisx.max - x1) / (x2 - x1)) * (y2 - y1) + y1;
|
||
|
|
x1 = axisx.max;
|
||
|
|
} else if (x2 >= x1 && x2 > axisx.max) {
|
||
|
|
if (x1 > axisx.max) continue;
|
||
|
|
y2 = ((axisx.max - x1) / (x2 - x1)) * (y2 - y1) + y1;
|
||
|
|
x2 = axisx.max;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!areaOpen) {
|
||
|
|
// open area
|
||
|
|
ctx.beginPath();
|
||
|
|
ctx.moveTo(axisx.p2c(x1), axisy.p2c(bottom));
|
||
|
|
areaOpen = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
// now first check the case where both is outside
|
||
|
|
if (y1 >= axisy.max && y2 >= axisy.max) {
|
||
|
|
ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.max));
|
||
|
|
ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.max));
|
||
|
|
continue;
|
||
|
|
} else if (y1 <= axisy.min && y2 <= axisy.min) {
|
||
|
|
ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.min));
|
||
|
|
ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.min));
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// else it's a bit more complicated, there might
|
||
|
|
// be a flat maxed out rectangle first, then a
|
||
|
|
// triangular cutout or reverse; to find these
|
||
|
|
// keep track of the current x values
|
||
|
|
var x1old = x1,
|
||
|
|
x2old = x2;
|
||
|
|
|
||
|
|
// clip the y values, without shortcutting, we
|
||
|
|
// go through all cases in turn
|
||
|
|
|
||
|
|
// clip with ymin
|
||
|
|
if (y1 <= y2 && y1 < axisy.min && y2 >= axisy.min) {
|
||
|
|
x1 = ((axisy.min - y1) / (y2 - y1)) * (x2 - x1) + x1;
|
||
|
|
y1 = axisy.min;
|
||
|
|
} else if (y2 <= y1 && y2 < axisy.min && y1 >= axisy.min) {
|
||
|
|
x2 = ((axisy.min - y1) / (y2 - y1)) * (x2 - x1) + x1;
|
||
|
|
y2 = axisy.min;
|
||
|
|
}
|
||
|
|
|
||
|
|
// clip with ymax
|
||
|
|
if (y1 >= y2 && y1 > axisy.max && y2 <= axisy.max) {
|
||
|
|
x1 = ((axisy.max - y1) / (y2 - y1)) * (x2 - x1) + x1;
|
||
|
|
y1 = axisy.max;
|
||
|
|
} else if (y2 >= y1 && y2 > axisy.max && y1 <= axisy.max) {
|
||
|
|
x2 = ((axisy.max - y1) / (y2 - y1)) * (x2 - x1) + x1;
|
||
|
|
y2 = axisy.max;
|
||
|
|
}
|
||
|
|
|
||
|
|
// if the x value was changed we got a rectangle
|
||
|
|
// to fill
|
||
|
|
if (x1 != x1old) {
|
||
|
|
ctx.lineTo(axisx.p2c(x1old), axisy.p2c(y1));
|
||
|
|
// it goes to (x1, y1), but we fill that below
|
||
|
|
}
|
||
|
|
|
||
|
|
// fill triangular section, this sometimes result
|
||
|
|
// in redundant points if (x1, y1) hasn't changed
|
||
|
|
// from previous line to, but we just ignore that
|
||
|
|
ctx.lineTo(axisx.p2c(x1), axisy.p2c(y1));
|
||
|
|
ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));
|
||
|
|
|
||
|
|
// fill the other rectangle if it's there
|
||
|
|
if (x2 != x2old) {
|
||
|
|
ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));
|
||
|
|
ctx.lineTo(axisx.p2c(x2old), axisy.p2c(y2));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ctx.save();
|
||
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
||
|
|
ctx.lineJoin = "round";
|
||
|
|
|
||
|
|
var lw = series.lines.lineWidth,
|
||
|
|
sw = series.shadowSize;
|
||
|
|
// FIXME: consider another form of shadow when filling is turned on
|
||
|
|
if (lw > 0 && sw > 0) {
|
||
|
|
// draw shadow as a thick and thin line with transparency
|
||
|
|
ctx.lineWidth = sw;
|
||
|
|
ctx.strokeStyle = "rgba(0,0,0,0.1)";
|
||
|
|
// position shadow at angle from the mid of line
|
||
|
|
var angle = Math.PI / 18;
|
||
|
|
plotLine(
|
||
|
|
series.datapoints,
|
||
|
|
Math.sin(angle) * (lw / 2 + sw / 2),
|
||
|
|
Math.cos(angle) * (lw / 2 + sw / 2),
|
||
|
|
series.xaxis,
|
||
|
|
series.yaxis
|
||
|
|
);
|
||
|
|
ctx.lineWidth = sw / 2;
|
||
|
|
plotLine(
|
||
|
|
series.datapoints,
|
||
|
|
Math.sin(angle) * (lw / 2 + sw / 4),
|
||
|
|
Math.cos(angle) * (lw / 2 + sw / 4),
|
||
|
|
series.xaxis,
|
||
|
|
series.yaxis
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
ctx.lineWidth = lw;
|
||
|
|
ctx.strokeStyle = series.color;
|
||
|
|
var fillStyle = getFillStyle(series.lines, series.color, 0, plotHeight);
|
||
|
|
if (fillStyle) {
|
||
|
|
ctx.fillStyle = fillStyle;
|
||
|
|
plotLineArea(series.datapoints, series.xaxis, series.yaxis);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (lw > 0) plotLine(series.datapoints, 0, 0, series.xaxis, series.yaxis);
|
||
|
|
ctx.restore();
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawSeriesPoints(series) {
|
||
|
|
function plotPoints(
|
||
|
|
datapoints,
|
||
|
|
radius,
|
||
|
|
fillStyle,
|
||
|
|
offset,
|
||
|
|
shadow,
|
||
|
|
axisx,
|
||
|
|
axisy,
|
||
|
|
symbol
|
||
|
|
) {
|
||
|
|
var points = datapoints.points,
|
||
|
|
ps = datapoints.pointsize;
|
||
|
|
|
||
|
|
for (var i = 0; i < points.length; i += ps) {
|
||
|
|
var x = points[i],
|
||
|
|
y = points[i + 1];
|
||
|
|
if (
|
||
|
|
x == null ||
|
||
|
|
x < axisx.min ||
|
||
|
|
x > axisx.max ||
|
||
|
|
y < axisy.min ||
|
||
|
|
y > axisy.max
|
||
|
|
)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
ctx.beginPath();
|
||
|
|
x = axisx.p2c(x);
|
||
|
|
y = axisy.p2c(y) + offset;
|
||
|
|
if (symbol == "circle")
|
||
|
|
ctx.arc(x, y, radius, 0, shadow ? Math.PI : Math.PI * 2, false);
|
||
|
|
else symbol(ctx, x, y, radius, shadow);
|
||
|
|
ctx.closePath();
|
||
|
|
|
||
|
|
if (fillStyle) {
|
||
|
|
ctx.fillStyle = fillStyle;
|
||
|
|
ctx.fill();
|
||
|
|
}
|
||
|
|
ctx.stroke();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ctx.save();
|
||
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
||
|
|
|
||
|
|
var lw = series.points.lineWidth,
|
||
|
|
sw = series.shadowSize,
|
||
|
|
radius = series.points.radius,
|
||
|
|
symbol = series.points.symbol;
|
||
|
|
|
||
|
|
// If 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
|
||
|
|
var w = sw / 2;
|
||
|
|
ctx.lineWidth = w;
|
||
|
|
ctx.strokeStyle = "rgba(0,0,0,0.1)";
|
||
|
|
plotPoints(
|
||
|
|
series.datapoints,
|
||
|
|
radius,
|
||
|
|
null,
|
||
|
|
w + w / 2,
|
||
|
|
true,
|
||
|
|
series.xaxis,
|
||
|
|
series.yaxis,
|
||
|
|
symbol
|
||
|
|
);
|
||
|
|
|
||
|
|
ctx.strokeStyle = "rgba(0,0,0,0.2)";
|
||
|
|
plotPoints(
|
||
|
|
series.datapoints,
|
||
|
|
radius,
|
||
|
|
null,
|
||
|
|
w / 2,
|
||
|
|
true,
|
||
|
|
series.xaxis,
|
||
|
|
series.yaxis,
|
||
|
|
symbol
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
ctx.lineWidth = lw;
|
||
|
|
ctx.strokeStyle = series.color;
|
||
|
|
plotPoints(
|
||
|
|
series.datapoints,
|
||
|
|
radius,
|
||
|
|
getFillStyle(series.points, series.color),
|
||
|
|
0,
|
||
|
|
false,
|
||
|
|
series.xaxis,
|
||
|
|
series.yaxis,
|
||
|
|
symbol
|
||
|
|
);
|
||
|
|
ctx.restore();
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawBar(
|
||
|
|
x,
|
||
|
|
y,
|
||
|
|
b,
|
||
|
|
barLeft,
|
||
|
|
barRight,
|
||
|
|
offset,
|
||
|
|
fillStyleCallback,
|
||
|
|
axisx,
|
||
|
|
axisy,
|
||
|
|
c,
|
||
|
|
horizontal,
|
||
|
|
lineWidth
|
||
|
|
) {
|
||
|
|
var left,
|
||
|
|
right,
|
||
|
|
bottom,
|
||
|
|
top,
|
||
|
|
drawLeft,
|
||
|
|
drawRight,
|
||
|
|
drawTop,
|
||
|
|
drawBottom,
|
||
|
|
tmp;
|
||
|
|
|
||
|
|
// in horizontal mode, we start the bar from the left
|
||
|
|
// instead of from the bottom so it appears to be
|
||
|
|
// horizontal rather than vertical
|
||
|
|
if (horizontal) {
|
||
|
|
drawBottom = drawRight = drawTop = true;
|
||
|
|
drawLeft = false;
|
||
|
|
left = b;
|
||
|
|
right = x;
|
||
|
|
top = y + barLeft;
|
||
|
|
bottom = y + barRight;
|
||
|
|
|
||
|
|
// account for negative bars
|
||
|
|
if (right < left) {
|
||
|
|
tmp = right;
|
||
|
|
right = left;
|
||
|
|
left = tmp;
|
||
|
|
drawLeft = true;
|
||
|
|
drawRight = false;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
drawLeft = drawRight = drawTop = true;
|
||
|
|
drawBottom = false;
|
||
|
|
left = x + barLeft;
|
||
|
|
right = x + barRight;
|
||
|
|
bottom = b;
|
||
|
|
top = y;
|
||
|
|
|
||
|
|
// account for negative bars
|
||
|
|
if (top < bottom) {
|
||
|
|
tmp = top;
|
||
|
|
top = bottom;
|
||
|
|
bottom = tmp;
|
||
|
|
drawBottom = true;
|
||
|
|
drawTop = false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// clip
|
||
|
|
if (
|
||
|
|
right < axisx.min ||
|
||
|
|
left > axisx.max ||
|
||
|
|
top < axisy.min ||
|
||
|
|
bottom > axisy.max
|
||
|
|
)
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (left < axisx.min) {
|
||
|
|
left = axisx.min;
|
||
|
|
drawLeft = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (right > axisx.max) {
|
||
|
|
right = axisx.max;
|
||
|
|
drawRight = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (bottom < axisy.min) {
|
||
|
|
bottom = axisy.min;
|
||
|
|
drawBottom = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (top > axisy.max) {
|
||
|
|
top = axisy.max;
|
||
|
|
drawTop = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
left = axisx.p2c(left);
|
||
|
|
bottom = axisy.p2c(bottom);
|
||
|
|
right = axisx.p2c(right);
|
||
|
|
top = axisy.p2c(top);
|
||
|
|
|
||
|
|
// fill the bar
|
||
|
|
if (fillStyleCallback) {
|
||
|
|
c.beginPath();
|
||
|
|
c.moveTo(left, bottom);
|
||
|
|
c.lineTo(left, top);
|
||
|
|
c.lineTo(right, top);
|
||
|
|
c.lineTo(right, bottom);
|
||
|
|
c.fillStyle = fillStyleCallback(bottom, top);
|
||
|
|
c.fill();
|
||
|
|
}
|
||
|
|
|
||
|
|
// draw outline
|
||
|
|
if (lineWidth > 0 && (drawLeft || drawRight || drawTop || drawBottom)) {
|
||
|
|
c.beginPath();
|
||
|
|
|
||
|
|
// FIXME: inline moveTo is buggy with excanvas
|
||
|
|
c.moveTo(left, bottom + offset);
|
||
|
|
if (drawLeft) c.lineTo(left, top + offset);
|
||
|
|
else c.moveTo(left, top + offset);
|
||
|
|
if (drawTop) c.lineTo(right, top + offset);
|
||
|
|
else c.moveTo(right, top + offset);
|
||
|
|
if (drawRight) c.lineTo(right, bottom + offset);
|
||
|
|
else c.moveTo(right, bottom + offset);
|
||
|
|
if (drawBottom) c.lineTo(left, bottom + offset);
|
||
|
|
else c.moveTo(left, bottom + offset);
|
||
|
|
c.stroke();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawSeriesBars(series) {
|
||
|
|
function plotBars(
|
||
|
|
datapoints,
|
||
|
|
barLeft,
|
||
|
|
barRight,
|
||
|
|
offset,
|
||
|
|
fillStyleCallback,
|
||
|
|
axisx,
|
||
|
|
axisy
|
||
|
|
) {
|
||
|
|
var points = datapoints.points,
|
||
|
|
ps = datapoints.pointsize;
|
||
|
|
|
||
|
|
for (var i = 0; i < points.length; i += ps) {
|
||
|
|
if (points[i] == null) continue;
|
||
|
|
drawBar(
|
||
|
|
points[i],
|
||
|
|
points[i + 1],
|
||
|
|
points[i + 2],
|
||
|
|
barLeft,
|
||
|
|
barRight,
|
||
|
|
offset,
|
||
|
|
fillStyleCallback,
|
||
|
|
axisx,
|
||
|
|
axisy,
|
||
|
|
ctx,
|
||
|
|
series.bars.horizontal,
|
||
|
|
series.bars.lineWidth
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ctx.save();
|
||
|
|
ctx.translate(plotOffset.left, plotOffset.top);
|
||
|
|
|
||
|
|
// FIXME: figure out a way to add shadows (for instance along the right edge)
|
||
|
|
ctx.lineWidth = series.bars.lineWidth;
|
||
|
|
ctx.strokeStyle = series.color;
|
||
|
|
|
||
|
|
var barLeft;
|
||
|
|
|
||
|
|
switch (series.bars.align) {
|
||
|
|
case "left":
|
||
|
|
barLeft = 0;
|
||
|
|
break;
|
||
|
|
case "right":
|
||
|
|
barLeft = -series.bars.barWidth;
|
||
|
|
break;
|
||
|
|
case "center":
|
||
|
|
barLeft = -series.bars.barWidth / 2;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
throw new Error("Invalid bar alignment: " + series.bars.align);
|
||
|
|
}
|
||
|
|
|
||
|
|
var fillStyleCallback = series.bars.fill
|
||
|
|
? function (bottom, top) {
|
||
|
|
return getFillStyle(series.bars, series.color, bottom, top);
|
||
|
|
}
|
||
|
|
: null;
|
||
|
|
plotBars(
|
||
|
|
series.datapoints,
|
||
|
|
barLeft,
|
||
|
|
barLeft + series.bars.barWidth,
|
||
|
|
0,
|
||
|
|
fillStyleCallback,
|
||
|
|
series.xaxis,
|
||
|
|
series.yaxis
|
||
|
|
);
|
||
|
|
ctx.restore();
|
||
|
|
}
|
||
|
|
|
||
|
|
function getFillStyle(filloptions, seriesColor, bottom, top) {
|
||
|
|
var fill = filloptions.fill;
|
||
|
|
if (!fill) return null;
|
||
|
|
|
||
|
|
if (filloptions.fillColor)
|
||
|
|
return getColorOrGradient(
|
||
|
|
filloptions.fillColor,
|
||
|
|
bottom,
|
||
|
|
top,
|
||
|
|
seriesColor
|
||
|
|
);
|
||
|
|
|
||
|
|
var c = $.color.parse(seriesColor);
|
||
|
|
c.a = typeof fill == "number" ? fill : 0.4;
|
||
|
|
c.normalize();
|
||
|
|
return c.toString();
|
||
|
|
}
|
||
|
|
|
||
|
|
function insertLegend() {
|
||
|
|
placeholder.find(".legend").remove();
|
||
|
|
|
||
|
|
if (!options.legend.show) return;
|
||
|
|
|
||
|
|
var fragments = [],
|
||
|
|
entries = [],
|
||
|
|
rowStarted = false,
|
||
|
|
lf = options.legend.labelFormatter,
|
||
|
|
s,
|
||
|
|
label;
|
||
|
|
|
||
|
|
// Build a list of legend entries, with each having a label and a color
|
||
|
|
|
||
|
|
for (var i = 0; i < series.length; ++i) {
|
||
|
|
s = series[i];
|
||
|
|
if (s.label) {
|
||
|
|
label = lf ? lf(s.label, s) : s.label;
|
||
|
|
if (label) {
|
||
|
|
entries.push({
|
||
|
|
label: label,
|
||
|
|
color: s.color,
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Sort the legend using either the default or a custom comparator
|
||
|
|
|
||
|
|
if (options.legend.sorted) {
|
||
|
|
if ($.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) {
|
||
|
|
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) {
|
||
|
|
var 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
|
||
|
|
var c = options.legend.backgroundColor;
|
||
|
|
if (c == null) {
|
||
|
|
c = options.grid.backgroundColor;
|
||
|
|
if (c && typeof c == "string") c = $.color.parse(c);
|
||
|
|
else c = $.color.extract(legend, "background-color");
|
||
|
|
c.a = 1;
|
||
|
|
c = c.toString();
|
||
|
|
}
|
||
|
|
var div = legend.children();
|
||
|
|
$(
|
||
|
|
'<div style="position:absolute;width:' +
|
||
|
|
div.width() +
|
||
|
|
"px;height:" +
|
||
|
|
div.height() +
|
||
|
|
"px;" +
|
||
|
|
pos +
|
||
|
|
"background-color:" +
|
||
|
|
c +
|
||
|
|
';"> </div>'
|
||
|
|
)
|
||
|
|
.prependTo(legend)
|
||
|
|
.css("opacity", options.legend.backgroundOpacity);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// interactive features
|
||
|
|
|
||
|
|
var highlights = [],
|
||
|
|
redrawTimeout = null;
|
||
|
|
|
||
|
|
// returns the data item the mouse is over, or null if none is found
|
||
|
|
function findNearbyItem(mouseX, mouseY, seriesFilter) {
|
||
|
|
var maxDistance = options.grid.mouseActiveRadius,
|
||
|
|
smallestDistance = maxDistance * maxDistance + 1,
|
||
|
|
item = null,
|
||
|
|
foundPoint = false,
|
||
|
|
i,
|
||
|
|
j,
|
||
|
|
ps;
|
||
|
|
|
||
|
|
for (i = series.length - 1; i >= 0; --i) {
|
||
|
|
if (!seriesFilter(series[i])) continue;
|
||
|
|
|
||
|
|
var s = series[i],
|
||
|
|
axisx = s.xaxis,
|
||
|
|
axisy = s.yaxis,
|
||
|
|
points = s.datapoints.points,
|
||
|
|
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
|
||
|
|
var dx = Math.abs(axisx.p2c(x) - mouseX),
|
||
|
|
dy = Math.abs(axisy.p2c(y) - mouseY),
|
||
|
|
dist = dx * dx + dy * dy; // we save the sqrt
|
||
|
|
|
||
|
|
// use <= to ensure last point takes precedence
|
||
|
|
// (last generally means on top of)
|
||
|
|
if (dist < smallestDistance) {
|
||
|
|
smallestDistance = dist;
|
||
|
|
item = [i, j / ps];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (s.bars.show && !item) {
|
||
|
|
// no other point can be nearby
|
||
|
|
var barLeft = s.bars.align == "left" ? 0 : -s.bars.barWidth / 2,
|
||
|
|
barRight = barLeft + s.bars.barWidth;
|
||
|
|
|
||
|
|
for (j = 0; j < points.length; j += ps) {
|
||
|
|
var x = points[j],
|
||
|
|
y = points[j + 1],
|
||
|
|
b = points[j + 2];
|
||
|
|
if (x == null) continue;
|
||
|
|
|
||
|
|
// for a bar graph, the cursor must be inside the bar
|
||
|
|
if (
|
||
|
|
series[i].bars.horizontal
|
||
|
|
? mx <= Math.max(b, x) &&
|
||
|
|
mx >= Math.min(b, x) &&
|
||
|
|
my >= y + barLeft &&
|
||
|
|
my <= y + barRight
|
||
|
|
: mx >= x + barLeft &&
|
||
|
|
mx <= x + barRight &&
|
||
|
|
my >= Math.min(b, y) &&
|
||
|
|
my <= Math.max(b, y)
|
||
|
|
)
|
||
|
|
item = [i, j / ps];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (item) {
|
||
|
|
i = item[0];
|
||
|
|
j = item[1];
|
||
|
|
ps = series[i].datapoints.pointsize;
|
||
|
|
|
||
|
|
return {
|
||
|
|
datapoint: series[i].datapoints.points.slice(j * ps, (j + 1) * ps),
|
||
|
|
dataIndex: j,
|
||
|
|
series: series[i],
|
||
|
|
seriesIndex: i,
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
|
||
|
|
function onMouseMove(e) {
|
||
|
|
if (options.grid.hoverable)
|
||
|
|
triggerClickHoverEvent("plothover", e, function (s) {
|
||
|
|
return s["hoverable"] != false;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
function onMouseLeave(e) {
|
||
|
|
if (options.grid.hoverable)
|
||
|
|
triggerClickHoverEvent("plothover", e, function (s) {
|
||
|
|
return false;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
function onClick(e) {
|
||
|
|
triggerClickHoverEvent("plotclick", e, function (s) {
|
||
|
|
return s["clickable"] != false;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
// trigger click or hover event (they send the same parameters
|
||
|
|
// so we share their code)
|
||
|
|
function triggerClickHoverEvent(eventname, event, seriesFilter) {
|
||
|
|
var offset = eventHolder.offset(),
|
||
|
|
canvasX = event.pageX - offset.left - plotOffset.left,
|
||
|
|
canvasY = event.pageY - offset.top - plotOffset.top,
|
||
|
|
pos = canvasToAxisCoords({ left: canvasX, top: canvasY });
|
||
|
|
|
||
|
|
pos.pageX = event.pageX;
|
||
|
|
pos.pageY = event.pageY;
|
||
|
|
|
||
|
|
var item = findNearbyItem(canvasX, canvasY, seriesFilter);
|
||
|
|
|
||
|
|
if (item) {
|
||
|
|
// fill in mouse pos for any listeners out there
|
||
|
|
item.pageX = parseInt(
|
||
|
|
item.series.xaxis.p2c(item.datapoint[0]) +
|
||
|
|
offset.left +
|
||
|
|
plotOffset.left,
|
||
|
|
10
|
||
|
|
);
|
||
|
|
item.pageY = parseInt(
|
||
|
|
item.series.yaxis.p2c(item.datapoint[1]) +
|
||
|
|
offset.top +
|
||
|
|
plotOffset.top,
|
||
|
|
10
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (options.grid.autoHighlight) {
|
||
|
|
// clear auto-highlights
|
||
|
|
for (var i = 0; i < highlights.length; ++i) {
|
||
|
|
var h = highlights[i];
|
||
|
|
if (
|
||
|
|
h.auto == eventname &&
|
||
|
|
!(
|
||
|
|
item &&
|
||
|
|
h.series == item.series &&
|
||
|
|
h.point[0] == item.datapoint[0] &&
|
||
|
|
h.point[1] == item.datapoint[1]
|
||
|
|
)
|
||
|
|
)
|
||
|
|
unhighlight(h.series, h.point);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (item) highlight(item.series, item.datapoint, eventname);
|
||
|
|
}
|
||
|
|
|
||
|
|
placeholder.trigger(eventname, [pos, item]);
|
||
|
|
}
|
||
|
|
|
||
|
|
function triggerRedrawOverlay() {
|
||
|
|
var 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();
|
||
|
|
octx.clearRect(0, 0, canvasWidth, canvasHeight);
|
||
|
|
octx.translate(plotOffset.left, plotOffset.top);
|
||
|
|
|
||
|
|
var i, hi;
|
||
|
|
for (i = 0; i < highlights.length; ++i) {
|
||
|
|
hi = highlights[i];
|
||
|
|
|
||
|
|
if (hi.series.bars.show) drawBarHighlight(hi.series, hi.point);
|
||
|
|
else drawPointHighlight(hi.series, hi.point);
|
||
|
|
}
|
||
|
|
octx.restore();
|
||
|
|
|
||
|
|
executeHooks(hooks.drawOverlay, [octx]);
|
||
|
|
}
|
||
|
|
|
||
|
|
function highlight(s, point, auto) {
|
||
|
|
if (typeof s == "number") s = series[s];
|
||
|
|
|
||
|
|
if (typeof point == "number") {
|
||
|
|
var ps = s.datapoints.pointsize;
|
||
|
|
point = s.datapoints.points.slice(ps * point, ps * (point + 1));
|
||
|
|
}
|
||
|
|
|
||
|
|
var i = indexOfHighlight(s, point);
|
||
|
|
if (i == -1) {
|
||
|
|
highlights.push({ series: s, point: point, auto: auto });
|
||
|
|
|
||
|
|
triggerRedrawOverlay();
|
||
|
|
} else if (!auto) highlights[i].auto = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
function unhighlight(s, point) {
|
||
|
|
if (s == null && point == null) {
|
||
|
|
highlights = [];
|
||
|
|
triggerRedrawOverlay();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (typeof s == "number") s = series[s];
|
||
|
|
|
||
|
|
if (typeof point == "number") point = s.data[point];
|
||
|
|
|
||
|
|
var i = indexOfHighlight(s, point);
|
||
|
|
if (i != -1) {
|
||
|
|
highlights.splice(i, 1);
|
||
|
|
|
||
|
|
triggerRedrawOverlay();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function indexOfHighlight(s, p) {
|
||
|
|
for (var i = 0; i < highlights.length; ++i) {
|
||
|
|
var h = highlights[i];
|
||
|
|
if (h.series == s && h.point[0] == p[0] && h.point[1] == p[1]) return i;
|
||
|
|
}
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawPointHighlight(series, point) {
|
||
|
|
var x = point[0],
|
||
|
|
y = point[1],
|
||
|
|
axisx = series.xaxis,
|
||
|
|
axisy = series.yaxis,
|
||
|
|
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;
|
||
|
|
|
||
|
|
var pointRadius = series.points.radius + series.points.lineWidth / 2;
|
||
|
|
octx.lineWidth = pointRadius;
|
||
|
|
octx.strokeStyle = highlightColor;
|
||
|
|
var radius = 1.5 * pointRadius;
|
||
|
|
x = axisx.p2c(x);
|
||
|
|
y = axisy.p2c(y);
|
||
|
|
|
||
|
|
octx.beginPath();
|
||
|
|
if (series.points.symbol == "circle")
|
||
|
|
octx.arc(x, y, radius, 0, 2 * Math.PI, false);
|
||
|
|
else series.points.symbol(octx, x, y, radius, false);
|
||
|
|
octx.closePath();
|
||
|
|
octx.stroke();
|
||
|
|
}
|
||
|
|
|
||
|
|
function drawBarHighlight(series, point) {
|
||
|
|
var highlightColor =
|
||
|
|
typeof series.highlightColor === "string"
|
||
|
|
? series.highlightColor
|
||
|
|
: $.color.parse(series.color).scale("a", 0.5).toString(),
|
||
|
|
fillStyle = highlightColor,
|
||
|
|
barLeft = series.bars.align == "left" ? 0 : -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,
|
||
|
|
0,
|
||
|
|
function () {
|
||
|
|
return fillStyle;
|
||
|
|
},
|
||
|
|
series.xaxis,
|
||
|
|
series.yaxis,
|
||
|
|
octx,
|
||
|
|
series.bars.horizontal,
|
||
|
|
series.bars.lineWidth
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
function getColorOrGradient(spec, bottom, top, defaultColor) {
|
||
|
|
if (typeof spec == "string") return spec;
|
||
|
|
else {
|
||
|
|
// assume this is a gradient spec; IE currently only
|
||
|
|
// supports a simple vertical gradient properly, so that's
|
||
|
|
// what we support too
|
||
|
|
var gradient = ctx.createLinearGradient(0, top, 0, bottom);
|
||
|
|
|
||
|
|
for (var i = 0, l = spec.colors.length; i < l; ++i) {
|
||
|
|
var c = spec.colors[i];
|
||
|
|
if (typeof c != "string") {
|
||
|
|
var co = $.color.parse(defaultColor);
|
||
|
|
if (c.brightness != null) co = co.scale("rgb", c.brightness);
|
||
|
|
if (c.opacity != null) co.a *= c.opacity;
|
||
|
|
c = co.toString();
|
||
|
|
}
|
||
|
|
gradient.addColorStop(i / (l - 1), c);
|
||
|
|
}
|
||
|
|
|
||
|
|
return gradient;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Add the plot function to the top level of the jQuery object
|
||
|
|
|
||
|
|
$.plot = function (placeholder, data, options) {
|
||
|
|
//var t0 = new Date();
|
||
|
|
var plot = new Plot($(placeholder), data, options, $.plot.plugins);
|
||
|
|
//(window.console ? console.log : alert)("time used (msecs): " + ((new Date()).getTime() - t0.getTime()));
|
||
|
|
return plot;
|
||
|
|
};
|
||
|
|
|
||
|
|
$.plot.version = "0.8-alpha";
|
||
|
|
|
||
|
|
$.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);
|
||
|
|
}
|
||
|
|
})(jQuery);
|