auto_tests/tests/Util.js

   1 /**
   2  * @fileoverview Utility functions for Dygraphs.
   3  *
   4  * @author konigsberg@google.com (Robert Konigsberg)
   5  */
   6 var Util = {};
   7
   8 /**
   9  * Get the y-labels for a given axis.
  10  *
  11  * You can specify a parent if more than one graph is in the document.
  12  */
  13 Util.getYLabels = function(axis_num, parent) {
  14   axis_num = axis_num || "";
  15   parent = parent || document;
  16   var y_labels = parent.getElementsByClassName("dygraph-axis-label-y" + axis_num);
  17   var ary = [];
  18   for (var i = 0; i < y_labels.length; i++) {
  19     ary.push(y_labels[i].innerHTML);
  20   }
  21   return ary;
  22 }
  23
  24 /**
  25  * Get the x-labels for a given axis.
  26  *
  27  * You can specify a parent if more than one graph is in the document.
  28  */
  29 Util.getXLabels = function(parent) {
  30   parent = parent || document;
  31   var x_labels = parent.getElementsByClassName("dygraph-axis-label-x");
  32   var ary = [];
  33   for (var i = 0; i < x_labels.length; i++) {
  34     ary.push(x_labels[i].innerHTML);
  35   }
  36   return ary;
  37 }
  38
  39 /**
  40  * Returns all text in tags w/ a given css class, sorted.
  41  * You can specify a parent if more than one graph is on the document.
  42  */
  43 Util.getClassTexts = function(css_class, parent) {
  44   parent = parent || document;
  45   var texts = [];
  46   var els = parent.getElementsByClassName(css_class);
  47   for (var i = 0; i < els.length; i++) {
  48     texts[i] = els[i].textContent;
  49   }
  50   texts.sort();
  51   return texts;
  52 }
  53
  54 Util.getLegend = function(parent) {
  55   parent = parent || document;
  56   var legend = parent.getElementsByClassName("dygraph-legend")[0];
  57   return legend.textContent;
  58 }
  59
  60
  61 /**
  62  * Takes in an array of strings and returns an array of floats.
  63  */
  64 Util.makeNumbers = function(ary) {
  65   var ret = [];
  66   for (var i = 0; i < ary.length; i++) {
  67     ret.push(parseFloat(ary[i]));
  68   }
  69   return ret;
  70 }