jquery.flot.js
5 years ago
jquery.flot.min.js
2 years ago
jquery.flot.pie.js
5 years ago
jquery.flot.pie.min.js
2 years ago
jquery.flot.resize.js
5 years ago
jquery.flot.resize.min.js
2 years ago
jquery.flot.stack.js
8 years ago
jquery.flot.stack.min.js
2 years ago
jquery.flot.time.js
8 years ago
jquery.flot.time.min.js
2 years ago
jquery.flot.stack.js
188 lines
| 1 | /* Flot plugin for stacking data sets rather than overlyaing them. |
| 2 | |
| 3 | Copyright (c) 2007-2013 IOLA and Ole Laursen. |
| 4 | Licensed under the MIT license. |
| 5 | |
| 6 | The plugin assumes the data is sorted on x (or y if stacking horizontally). |
| 7 | For line charts, it is assumed that if a line has an undefined gap (from a |
| 8 | null point), then the line above it should have the same gap - insert zeros |
| 9 | instead of "null" if you want another behaviour. This also holds for the start |
| 10 | and end of the chart. Note that stacking a mix of positive and negative values |
| 11 | in most instances doesn't make sense (so it looks weird). |
| 12 | |
| 13 | Two or more series are stacked when their "stack" attribute is set to the same |
| 14 | key (which can be any number or string or just "true"). To specify the default |
| 15 | stack, you can set the stack option like this: |
| 16 | |
| 17 | series: { |
| 18 | stack: null/false, true, or a key (number/string) |
| 19 | } |
| 20 | |
| 21 | You can also specify it for a single series, like this: |
| 22 | |
| 23 | $.plot( $("#placeholder"), [{ |
| 24 | data: [ ... ], |
| 25 | stack: true |
| 26 | }]) |
| 27 | |
| 28 | The stacking order is determined by the order of the data series in the array |
| 29 | (later series end up on top of the previous). |
| 30 | |
| 31 | Internally, the plugin modifies the datapoints in each series, adding an |
| 32 | offset to the y value. For line series, extra data points are inserted through |
| 33 | interpolation. If there's a second y value, it's also adjusted (e.g for bar |
| 34 | charts or filled areas). |
| 35 | |
| 36 | */ |
| 37 | |
| 38 | (function ($) { |
| 39 | var options = { |
| 40 | series: { stack: null } // or number/string |
| 41 | }; |
| 42 | |
| 43 | function init(plot) { |
| 44 | function findMatchingSeries(s, allseries) { |
| 45 | var res = null; |
| 46 | for (var i = 0; i < allseries.length; ++i) { |
| 47 | if (s == allseries[i]) |
| 48 | break; |
| 49 | |
| 50 | if (allseries[i].stack == s.stack) |
| 51 | res = allseries[i]; |
| 52 | } |
| 53 | |
| 54 | return res; |
| 55 | } |
| 56 | |
| 57 | function stackData(plot, s, datapoints) { |
| 58 | if (s.stack == null || s.stack === false) |
| 59 | return; |
| 60 | |
| 61 | var other = findMatchingSeries(s, plot.getData()); |
| 62 | if (!other) |
| 63 | return; |
| 64 | |
| 65 | var ps = datapoints.pointsize, |
| 66 | points = datapoints.points, |
| 67 | otherps = other.datapoints.pointsize, |
| 68 | otherpoints = other.datapoints.points, |
| 69 | newpoints = [], |
| 70 | px, py, intery, qx, qy, bottom, |
| 71 | withlines = s.lines.show, |
| 72 | horizontal = s.bars.horizontal, |
| 73 | withbottom = ps > 2 && (horizontal ? datapoints.format[2].x : datapoints.format[2].y), |
| 74 | withsteps = withlines && s.lines.steps, |
| 75 | fromgap = true, |
| 76 | keyOffset = horizontal ? 1 : 0, |
| 77 | accumulateOffset = horizontal ? 0 : 1, |
| 78 | i = 0, j = 0, l, m; |
| 79 | |
| 80 | while (true) { |
| 81 | if (i >= points.length) |
| 82 | break; |
| 83 | |
| 84 | l = newpoints.length; |
| 85 | |
| 86 | if (points[i] == null) { |
| 87 | // copy gaps |
| 88 | for (m = 0; m < ps; ++m) |
| 89 | newpoints.push(points[i + m]); |
| 90 | i += ps; |
| 91 | } |
| 92 | else if (j >= otherpoints.length) { |
| 93 | // for lines, we can't use the rest of the points |
| 94 | if (!withlines) { |
| 95 | for (m = 0; m < ps; ++m) |
| 96 | newpoints.push(points[i + m]); |
| 97 | } |
| 98 | i += ps; |
| 99 | } |
| 100 | else if (otherpoints[j] == null) { |
| 101 | // oops, got a gap |
| 102 | for (m = 0; m < ps; ++m) |
| 103 | newpoints.push(null); |
| 104 | fromgap = true; |
| 105 | j += otherps; |
| 106 | } |
| 107 | else { |
| 108 | // cases where we actually got two points |
| 109 | px = points[i + keyOffset]; |
| 110 | py = points[i + accumulateOffset]; |
| 111 | qx = otherpoints[j + keyOffset]; |
| 112 | qy = otherpoints[j + accumulateOffset]; |
| 113 | bottom = 0; |
| 114 | |
| 115 | if (px == qx) { |
| 116 | for (m = 0; m < ps; ++m) |
| 117 | newpoints.push(points[i + m]); |
| 118 | |
| 119 | newpoints[l + accumulateOffset] += qy; |
| 120 | bottom = qy; |
| 121 | |
| 122 | i += ps; |
| 123 | j += otherps; |
| 124 | } |
| 125 | else if (px > qx) { |
| 126 | // we got past point below, might need to |
| 127 | // insert interpolated extra point |
| 128 | if (withlines && i > 0 && points[i - ps] != null) { |
| 129 | intery = py + (points[i - ps + accumulateOffset] - py) * (qx - px) / (points[i - ps + keyOffset] - px); |
| 130 | newpoints.push(qx); |
| 131 | newpoints.push(intery + qy); |
| 132 | for (m = 2; m < ps; ++m) |
| 133 | newpoints.push(points[i + m]); |
| 134 | bottom = qy; |
| 135 | } |
| 136 | |
| 137 | j += otherps; |
| 138 | } |
| 139 | else { // px < qx |
| 140 | if (fromgap && withlines) { |
| 141 | // if we come from a gap, we just skip this point |
| 142 | i += ps; |
| 143 | continue; |
| 144 | } |
| 145 | |
| 146 | for (m = 0; m < ps; ++m) |
| 147 | newpoints.push(points[i + m]); |
| 148 | |
| 149 | // we might be able to interpolate a point below, |
| 150 | // this can give us a better y |
| 151 | if (withlines && j > 0 && otherpoints[j - otherps] != null) |
| 152 | bottom = qy + (otherpoints[j - otherps + accumulateOffset] - qy) * (px - qx) / (otherpoints[j - otherps + keyOffset] - qx); |
| 153 | |
| 154 | newpoints[l + accumulateOffset] += bottom; |
| 155 | |
| 156 | i += ps; |
| 157 | } |
| 158 | |
| 159 | fromgap = false; |
| 160 | |
| 161 | if (l != newpoints.length && withbottom) |
| 162 | newpoints[l + 2] += bottom; |
| 163 | } |
| 164 | |
| 165 | // maintain the line steps invariant |
| 166 | if (withsteps && l != newpoints.length && l > 0 |
| 167 | && newpoints[l] != null |
| 168 | && newpoints[l] != newpoints[l - ps] |
| 169 | && newpoints[l + 1] != newpoints[l - ps + 1]) { |
| 170 | for (m = 0; m < ps; ++m) |
| 171 | newpoints[l + ps + m] = newpoints[l + m]; |
| 172 | newpoints[l + 1] = newpoints[l - ps + 1]; |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | datapoints.points = newpoints; |
| 177 | } |
| 178 | |
| 179 | plot.hooks.processDatapoints.push(stackData); |
| 180 | } |
| 181 | |
| 182 | $.plot.plugins.push({ |
| 183 | init: init, |
| 184 | options: options, |
| 185 | name: 'stack', |
| 186 | version: '1.2' |
| 187 | }); |
| 188 | })(jQuery); |