我有一个包含2个数据系列的Google Line Chart - Row A
和Row B
:
这是一个非常简单的测试代码 - 只需在浏览器中打开它就可以了:
<!DOCTYPE HTML>
<html>
<head>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script type="text/javascript" src="https://www.google.com/jsapi?autoload={'modules':[{'name':'visualization','version':'1','packages':['corechart']}]}"></script>
<script type="text/javascript">
var data = {"rows":[
{"c":[{"v":"C"},{"v":-43},{"v":-42}]},
{"c":[{"v":"D"},{"v":-49},{"v":-39}]},
{"c":[{"v":"E"},{"v":-49},{"v":-48}]},
{"c":[{"v":"F"},{"v":-50},{"v":-49}]},
{"c":[{"v":"G"},{"v":-57},{"v":-56}]}],
"cols":[
{"p":{"role":"domain"},"label":"MEASUREMENT","type":"string"},
{"p":{"role":"data"},"label":"Row A","type":"number"},
{"p":{"role":"data"},"label":"Row B","type":"number"}]};
function drawCharts() {
var x = new google.visualization.DataTable(data);
var options = {
title: 'How to add tooltips?',
width: 800,
height: 600
};
var chart = new google.visualization.LineChart(document.getElementById('test'));
chart.draw(x, options);
}
$(function() {
google.setOnLoadCallback(drawCharts);
});
</script>
</head>
<body>
<div id="test"></div>
</body>
</html>
我想将tooltips添加到每个数据点,例如显示:
A行:x = D y = -49
鼠标悬停。我无法使用dataTable.addColumn
,因为我的图表是由perl脚本一次生成的,我只使用data
对象cols
和rows
,如上所述。
有人请知道,怎么在这里做?
答案 0 :(得分:11)
您可以使用DataView为您创建工具提示列。此代码段将在DataView中为每个数据系列动态创建工具提示列:
var columns = [0];
for (var i = 1; i < x.getNumberOfColumns(); i++) {
columns.push(i);
columns.push({
type: 'string',
properties: {
role: 'tooltip'
},
calc: (function (j) {
return function (dt, row) {
return dt.getColumnLabel(j) + ': x=' + dt.getValue(row, 0) + ' y=' + dt.getValue(row, j)
}
})(i)
});
}
var view = new google.visualization.DataView(x);
view.setColumns(columns);
请参阅此处的工作示例:http://jsfiddle.net/asgallant/xWwxP/