Update plugin registry
[dygraphs.git] / dygraph-gviz.js
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1/**
2 * @license
3 * Copyright 2011 Dan Vanderkam (danvdk@gmail.com)
4 * MIT-licensed (http://opensource.org/licenses/MIT)
5 */
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6
7/**
8 * @fileoverview A wrapper around the Dygraph class which implements the
9 * interface for a GViz (aka Google Visualization API) visualization.
10 * It is designed to be a drop-in replacement for Google's AnnotatedTimeline,
11 * so the documentation at
12 * http://code.google.com/apis/chart/interactive/docs/gallery/annotatedtimeline.html
13 * translates over directly.
14 *
15 * For a full demo, see:
16 * - http://dygraphs.com/tests/gviz.html
17 * - http://dygraphs.com/tests/annotation-gviz.html
18 */
19
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20/*jshint globalstrict: true */
21/*global Dygraph:false */
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22"use strict";
23
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24/**
25 * A wrapper around Dygraph that implements the gviz API.
26 * @param {Object} container The DOM object the visualization should live in.
27 */
28Dygraph.GVizChart = function(container) {
29 this.container = container;
758a629f 30};
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31
32Dygraph.GVizChart.prototype.draw = function(data, options) {
33 // Clear out any existing dygraph.
34 // TODO(danvk): would it make more sense to simply redraw using the current
35 // date_graph object?
36 this.container.innerHTML = '';
37 if (typeof(this.date_graph) != 'undefined') {
38 this.date_graph.destroy();
39 }
40
41 this.date_graph = new Dygraph(this.container, data, options);
758a629f 42};
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43
44/**
45 * Google charts compatible setSelection
46 * Only row selection is supported, all points in the row will be highlighted
47 * @param {Array} array of the selected cells
48 * @public
49 */
50Dygraph.GVizChart.prototype.setSelection = function(selection_array) {
51 var row = false;
52 if (selection_array.length) {
53 row = selection_array[0].row;
54 }
55 this.date_graph.setSelection(row);
758a629f 56};
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57
58/**
59 * Google charts compatible getSelection implementation
60 * @return {Array} array of the selected cells
61 * @public
62 */
63Dygraph.GVizChart.prototype.getSelection = function() {
64 var selection = [];
65
66 var row = this.date_graph.getSelection();
67
68 if (row < 0) return selection;
69
758a629f 70 var datasets = this.date_graph.layout_.datasets;
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71 for (var setIdx = 0; setIdx < datasets.length; ++setIdx) {
72 selection.push({row: row, column: setIdx + 1});
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73 }
74
75 return selection;
758a629f 76};