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