src/ceph/src/pybind/mgr/dashboard/static/AdminLTE-2.3.7/plugins/flot/jquery.flot.threshold.js

   1 /* Flot plugin for thresholding data.
   2
   3 Copyright (c) 2007-2013 IOLA and Ole Laursen.
   4 Licensed under the MIT license.
   5
   6 The plugin supports these options:
   7
   8         series: {
   9                 threshold: {
  10                         below: number
  11                         color: colorspec
  12                 }
  13         }
  14
  15 It can also be applied to a single series, like this:
  16
  17         $.plot( $("#placeholder"), [{
  18                 data: [ ... ],
  19                 threshold: { ... }
  20         }])
  21
  22 An array can be passed for multiple thresholding, like this:
  23
  24         threshold: [{
  25                 below: number1
  26                 color: color1
  27         },{
  28                 below: number2
  29                 color: color2
  30         }]
  31
  32 These multiple threshold objects can be passed in any order since they are
  33 sorted by the processing function.
  34
  35 The data points below "below" are drawn with the specified color. This makes
  36 it easy to mark points below 0, e.g. for budget data.
  37
  38 Internally, the plugin works by splitting the data into two series, above and
  39 below the threshold. The extra series below the threshold will have its label
  40 cleared and the special "originSeries" attribute set to the original series.
  41 You may need to check for this in hover events.
  42
  43 */
  44
  45 (function ($) {
  46     var options = {
  47         series: { threshold: null } // or { below: number, color: color spec}
  48     };
  49
  50     function init(plot) {
  51         function thresholdData(plot, s, datapoints, below, color) {
  52             var ps = datapoints.pointsize, i, x, y, p, prevp,
  53                 thresholded = $.extend({}, s); // note: shallow copy
  54
  55             thresholded.datapoints = { points: [], pointsize: ps, format: datapoints.format };
  56             thresholded.label = null;
  57             thresholded.color = color;
  58             thresholded.threshold = null;
  59             thresholded.originSeries = s;
  60             thresholded.data = [];
  61
  62             var origpoints = datapoints.points,
  63                 addCrossingPoints = s.lines.show;
  64
  65             var threspoints = [];
  66             var newpoints = [];
  67             var m;
  68
  69             for (i = 0; i < origpoints.length; i += ps) {
  70                 x = origpoints[i];
  71                 y = origpoints[i + 1];
  72
  73                 prevp = p;
  74                 if (y < below)
  75                     p = threspoints;
  76                 else
  77                     p = newpoints;
  78
  79                 if (addCrossingPoints && prevp != p && x != null
  80                     && i > 0 && origpoints[i - ps] != null) {
  81                     var interx = x + (below - y) * (x - origpoints[i - ps]) / (y - origpoints[i - ps + 1]);
  82                     prevp.push(interx);
  83                     prevp.push(below);
  84                     for (m = 2; m < ps; ++m)
  85                         prevp.push(origpoints[i + m]);
  86
  87                     p.push(null); // start new segment
  88                     p.push(null);
  89                     for (m = 2; m < ps; ++m)
  90                         p.push(origpoints[i + m]);
  91                     p.push(interx);
  92                     p.push(below);
  93                     for (m = 2; m < ps; ++m)
  94                         p.push(origpoints[i + m]);
  95                 }
  96
  97                 p.push(x);
  98                 p.push(y);
  99                 for (m = 2; m < ps; ++m)
 100                     p.push(origpoints[i + m]);
 101             }
 102
 103             datapoints.points = newpoints;
 104             thresholded.datapoints.points = threspoints;
 105
 106             if (thresholded.datapoints.points.length > 0) {
 107                 var origIndex = $.inArray(s, plot.getData());
 108                 // Insert newly-generated series right after original one (to prevent it from becoming top-most)
 109                 plot.getData().splice(origIndex + 1, 0, thresholded);
 110             }
 111
 112             // FIXME: there are probably some edge cases left in bars
 113         }
 114
 115         function processThresholds(plot, s, datapoints) {
 116             if (!s.threshold)
 117                 return;
 118
 119             if (s.threshold instanceof Array) {
 120                 s.threshold.sort(function(a, b) {
 121                     return a.below - b.below;
 122                 });
 123
 124                 $(s.threshold).each(function(i, th) {
 125                     thresholdData(plot, s, datapoints, th.below, th.color);
 126                 });
 127             }
 128             else {
 129                 thresholdData(plot, s, datapoints, s.threshold.below, s.threshold.color);
 130             }
 131         }
 132
 133         plot.hooks.processDatapoints.push(processThresholds);
 134     }
 135
 136     $.plot.plugins.push({
 137         init: init,
 138         options: options,
 139         name: 'threshold',
 140         version: '1.2'
 141     });
 142 })(jQuery);