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3123 lines
93 KiB
3123 lines
93 KiB
/* 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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grid: { |
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show: true, |
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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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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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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: { |
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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, |
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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: [], |
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shutdown: [], |
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}, |
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plot = this; |
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// public functions |
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plot.setData = setData; |
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plot.setupGrid = setupGrid; |
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plot.draw = draw; |
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plot.getPlaceholder = function () { |
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return placeholder; |
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}; |
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plot.getCanvas = function () { |
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return canvas; |
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}; |
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plot.getPlotOffset = function () { |
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return plotOffset; |
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}; |
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plot.width = function () { |
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return plotWidth; |
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}; |
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plot.height = function () { |
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return plotHeight; |
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}; |
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plot.offset = function () { |
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var o = eventHolder.offset(); |
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o.left += plotOffset.left; |
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o.top += plotOffset.top; |
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return o; |
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}; |
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plot.getData = function () { |
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return series; |
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}; |
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plot.getAxes = function () { |
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var res = {}, |
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i; |
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$.each(xaxes.concat(yaxes), function (_, axis) { |
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if (axis) |
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res[axis.direction + (axis.n != 1 ? axis.n : "") + "axis"] = axis; |
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}); |
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return res; |
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}; |
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plot.getXAxes = function () { |
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return xaxes; |
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}; |
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plot.getYAxes = function () { |
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return yaxes; |
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}; |
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plot.c2p = canvasToAxisCoords; |
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plot.p2c = axisToCanvasCoords; |
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plot.getOptions = function () { |
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return options; |
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}; |
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plot.highlight = highlight; |
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plot.unhighlight = unhighlight; |
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plot.triggerRedrawOverlay = triggerRedrawOverlay; |
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plot.pointOffset = function (point) { |
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return { |
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left: parseInt( |
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xaxes[axisNumber(point, "x") - 1].p2c(+point.x) + plotOffset.left, |
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10 |
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), |
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top: parseInt( |
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yaxes[axisNumber(point, "y") - 1].p2c(+point.y) + plotOffset.top, |
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10 |
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), |
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}; |
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}; |
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plot.shutdown = shutdown; |
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plot.resize = function () { |
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getCanvasDimensions(); |
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resizeCanvas(canvas); |
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resizeCanvas(overlay); |
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}; |
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// public attributes |
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plot.hooks = hooks; |
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// initialize |
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initPlugins(plot); |
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parseOptions(options_); |
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setupCanvases(); |
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setData(data_); |
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setupGrid(); |
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draw(); |
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bindEvents(); |
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function executeHooks(hook, args) { |
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args = [plot].concat(args); |
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for (var i = 0; i < hook.length; ++i) hook[i].apply(this, args); |
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} |
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function initPlugins() { |
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for (var i = 0; i < plugins.length; ++i) { |
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var p = plugins[i]; |
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p.init(plot); |
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if (p.options) $.extend(true, options, p.options); |
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} |
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} |
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function parseOptions(opts) { |
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var i; |
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$.extend(true, options, opts); |
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if (options.xaxis.color == null) options.xaxis.color = options.grid.color; |
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if (options.yaxis.color == null) options.yaxis.color = options.grid.color; |
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if (options.xaxis.tickColor == null) |
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// backwards-compatibility |
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options.xaxis.tickColor = options.grid.tickColor; |
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if (options.yaxis.tickColor == null) |
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// backwards-compatibility |
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options.yaxis.tickColor = options.grid.tickColor; |
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|
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if (options.grid.borderColor == null) |
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options.grid.borderColor = options.grid.color; |
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if (options.grid.tickColor == null) |
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options.grid.tickColor = $.color |
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.parse(options.grid.color) |
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.scale("a", 0.22) |
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.toString(); |
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|
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// fill in defaults in axes, copy at least always the |
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// first as the rest of the code assumes it'll be there |
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for (i = 0; i < Math.max(1, options.xaxes.length); ++i) |
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options.xaxes[i] = $.extend(true, {}, options.xaxis, options.xaxes[i]); |
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for (i = 0; i < Math.max(1, options.yaxes.length); ++i) |
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options.yaxes[i] = $.extend(true, {}, options.yaxis, options.yaxes[i]); |
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|
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// backwards compatibility, to be removed in future |
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if (options.xaxis.noTicks && options.xaxis.ticks == null) |
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options.xaxis.ticks = options.xaxis.noTicks; |
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if (options.yaxis.noTicks && options.yaxis.ticks == null) |
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options.yaxis.ticks = options.yaxis.noTicks; |
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if (options.x2axis) { |
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options.xaxes[1] = $.extend(true, {}, options.xaxis, options.x2axis); |
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options.xaxes[1].position = "top"; |
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} |
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if (options.y2axis) { |
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options.yaxes[1] = $.extend(true, {}, options.yaxis, options.y2axis); |
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options.yaxes[1].position = "right"; |
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} |
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if (options.grid.coloredAreas) |
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options.grid.markings = options.grid.coloredAreas; |
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if (options.grid.coloredAreasColor) |
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options.grid.markingsColor = options.grid.coloredAreasColor; |
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if (options.lines) $.extend(true, options.series.lines, options.lines); |
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if (options.points) $.extend(true, options.series.points, options.points); |
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if (options.bars) $.extend(true, options.series.bars, options.bars); |
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if (options.shadowSize != null) |
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options.series.shadowSize = options.shadowSize; |
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if (options.highlightColor != null) |
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options.series.highlightColor = options.highlightColor; |
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|
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// save options on axes for future reference |
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for (i = 0; i < options.xaxes.length; ++i) |
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getOrCreateAxis(xaxes, i + 1).options = options.xaxes[i]; |
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for (i = 0; i < options.yaxes.length; ++i) |
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getOrCreateAxis(yaxes, i + 1).options = options.yaxes[i]; |
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|
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// add hooks from options |
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for (var n in hooks) |
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if (options.hooks[n] && options.hooks[n].length) |
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hooks[n] = hooks[n].concat(options.hooks[n]); |
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|
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executeHooks(hooks.processOptions, [options]); |
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} |
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|
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function setData(d) { |
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series = parseData(d); |
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fillInSeriesOptions(); |
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processData(); |
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} |
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|
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function parseData(d) { |
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var res = []; |
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for (var i = 0; i < d.length; ++i) { |
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var s = $.extend(true, {}, options.series); |
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|
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if (d[i].data != null) { |
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s.data = d[i].data; // move the data instead of deep-copy |
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delete d[i].data; |
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|
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$.extend(true, s, d[i]); |
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|
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d[i].data = s.data; |
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} else s.data = d[i]; |
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res.push(s); |
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} |
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|
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return res; |
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} |
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|
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function axisNumber(obj, coord) { |
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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; |
|
} |
|
|
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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);
|
|
|