mirror of https://github.com/grafana/grafana
parent
608b66f3ce
commit
8fe8b0f159
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(function ($) { |
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var options = { |
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series: { |
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stackpercent: null |
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} // or number/string
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}; |
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function init(plot) { |
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// will be built up dynamically as a hash from x-value, or y-value if horizontal
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var stackBases = {}; |
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var processed = false; |
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var stackSums = {}; |
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//set percentage for stacked chart
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function processRawData(plot, series, data, datapoints) { |
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if (!processed) { |
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processed = true; |
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stackSums = getStackSums(plot.getData()); |
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} |
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if (series.stackpercent == true) { |
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var num = data.length; |
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series.percents = []; |
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var key_idx = 0; |
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var value_idx = 1; |
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if (series.bars && series.bars.horizontal && series.bars.horizontal === true) { |
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key_idx = 1; |
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value_idx = 0; |
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} |
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for (var j = 0; j < num; j++) { |
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var sum = stackSums[data[j][key_idx] + ""]; |
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if (sum > 0) { |
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series.percents.push(data[j][value_idx] * 100 / sum); |
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} else { |
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series.percents.push(0); |
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} |
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} |
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} |
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} |
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//calculate summary
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function getStackSums(_data) { |
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var data_len = _data.length; |
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var sums = {}; |
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if (data_len > 0) { |
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//caculate summary
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for (var i = 0; i < data_len; i++) { |
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if (_data[i].stackpercent) { |
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var key_idx = 0; |
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var value_idx = 1; |
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if (_data[i].bars && _data[i].bars.horizontal && _data[i].bars.horizontal === true) { |
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key_idx = 1; |
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value_idx = 0; |
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} |
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var num = _data[i].data.length; |
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for (var j = 0; j < num; j++) { |
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var value = 0; |
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if (_data[i].data[j][1] != null) { |
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value = _data[i].data[j][value_idx]; |
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} |
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if (sums[_data[i].data[j][key_idx] + ""]) { |
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sums[_data[i].data[j][key_idx] + ""] += value; |
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} else { |
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sums[_data[i].data[j][key_idx] + ""] = value; |
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} |
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} |
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} |
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} |
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} |
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return sums; |
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} |
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function stackData(plot, s, datapoints) { |
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if (!s.stackpercent) return; |
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if (!processed) { |
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stackSums = getStackSums(plot.getData()); |
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} |
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var newPoints = []; |
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var key_idx = 0; |
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var value_idx = 1; |
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if (s.bars && s.bars.horizontal && s.bars.horizontal === true) { |
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key_idx = 1; |
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value_idx = 0; |
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} |
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for (var i = 0; i < datapoints.points.length; i += 3) { |
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// note that the values need to be turned into absolute y-values.
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// in other words, if you were to stack (x, y1), (x, y2), and (x, y3),
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// (each from different series, which is where stackBases comes in),
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// you'd want the new points to be (x, y1, 0), (x, y1+y2, y1), (x, y1+y2+y3, y1+y2)
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// generally, (x, thisValue + (base up to this point), + (base up to this point))
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if (!stackBases[datapoints.points[i + key_idx]]) { |
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stackBases[datapoints.points[i + key_idx]] = 0; |
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} |
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newPoints[i + key_idx] = datapoints.points[i + key_idx]; |
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newPoints[i + value_idx] = datapoints.points[i + value_idx] + stackBases[datapoints.points[i + key_idx]]; |
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newPoints[i + 2] = stackBases[datapoints.points[i + key_idx]]; |
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stackBases[datapoints.points[i + key_idx]] += datapoints.points[i + value_idx]; |
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// change points to percentage values
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// you may need to set yaxis:{ max = 100 }
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if ( stackSums[newPoints[i+key_idx]+""] > 0 ){ |
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newPoints[i + value_idx] = newPoints[i + value_idx] * 100 / stackSums[newPoints[i + key_idx] + ""]; |
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newPoints[i + 2] = newPoints[i + 2] * 100 / stackSums[newPoints[i + key_idx] + ""]; |
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} else { |
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newPoints[i + value_idx] = 0; |
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newPoints[i + 2] = 0; |
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} |
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} |
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datapoints.points = newPoints; |
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} |
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plot.hooks.processRawData.push(processRawData); |
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plot.hooks.processDatapoints.push(stackData); |
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} |
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$.plot.plugins.push({ |
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init: init, |
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options: options, |
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name: 'stackpercent', |
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version: '0.1' |
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}); |
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})(jQuery); |
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