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1 | /** |
2 | * @fileoverview Utility functions for Dygraphs. | |
3 | * | |
4 | * @author konigsberg@google.com (Robert Konigsberg) | |
5 | */ | |
6 | var Util = {}; | |
7 | ||
8 | /** | |
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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. | |
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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; | |
d574a45e | 22 | }; |
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23 | |
24 | /** | |
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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; | |
d574a45e | 37 | }; |
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38 | |
39 | /** | |
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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; | |
d574a45e | 52 | }; |
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53 | |
54 | Util.getLegend = function(parent) { | |
55 | parent = parent || document; | |
56 | var legend = parent.getElementsByClassName("dygraph-legend")[0]; | |
57 | return legend.textContent; | |
d574a45e | 58 | }; |
846038aa | 59 | |
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60 | /** |
61 | * Assert that all the elements in 'parent' with class 'className' is | |
62 | * the expected font size. | |
63 | */ | |
64 | Util.assertFontSizes = function(parent, className, expectedSize) { | |
65 | var expectedSizePx = expectedSize + "px"; | |
66 | var labels = parent.getElementsByClassName(className); | |
67 | assertTrue(labels.length > 0); | |
68 | ||
69 | // window.getComputedStyle is apparently compatible with all browsers | |
70 | // (IE first became compatible with IE9.) | |
71 | // If this test fails on earlier browsers, then enable something like this, | |
72 | // because the font size is set by the parent div. | |
73 | // if (!window.getComputedStyle) { | |
74 | // fontSize = label.parentElement.style.fontSize; | |
75 | // } | |
76 | for (var idx = 0; idx < labels.length; idx++) { | |
77 | var label = labels[idx]; | |
78 | var fontSize = window.getComputedStyle(label).fontSize; | |
79 | assertEquals(expectedSizePx, fontSize); | |
80 | } | |
81 | }; |