我使用折线图，通过单击图例可以选择性地查看图表上的Y系列数据 . 像Google财经图表这样的东西允许您在图表上添加不同的股票 .
我想在此示例中添加日期范围过滤器，如注释图表底部：https://developers.google.com/chart/interactive/docs/gallery/annotationchart
但它只显示一个空白屏幕 .
这是我的折线图代码：
<html>
<head>
<script type="text/javascript" src="https://www.google.com/jsapi?autoload={'modules':[{'name':'visualization','version':'1','packages':['annotationchart']}]}"></script>
<script type='text/javascript'>
google.load("visualization", "1", {packages:["corechart"]});
google.load('visualization', '1', { packages : ['controls'] } );
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = google.visualization.arrayToDataTable([
['Date', 'Sales', 'Expenses'],
['2004', 1000, 400],
['2005', 1170, 460],
['2006', 660, 1120],
['2007', 1030, 540],
['2014', 1230, 40]
]);
var options = {
width: 900,
height: 600,
title: 'Company Performance',
displayAnnotations: true,
series: series
}
var chart = new google.visualization.LineChart(document.getElementById('chart_div')); //line chart
chart.draw(data, options);
var columns = [];
var series = {};
for (var i = 0; i < data.getNumberOfColumns(); i++) {
columns.push(i);
if (i > 0) {
series[i - 1] = {};
}
}
google.visualization.events.addListener(chart, 'select', function () {
var sel = chart.getSelection();
// if selection length is 0, we deselected an element
if (sel.length > 0) {
// if row is null, we clicked on the legend
if (sel[0].row == null) {
var col = sel[0].column;
if (columns[col] == col) {
// hide the data series
columns[col] = {
label: data.getColumnLabel(col),
type: data.getColumnType(col),
calc: function () {
return null;
}
};
// grey out the legend entry
series[col - 1].color = '#CCCCCC';
}
else {
// show the data series
columns[col] = col;
series[col - 1].color = null;
}
var view = new google.visualization.DataView(data);
view.setColumns(columns);
chart.draw(view, options);
}
}
});
}
</script>
</head>
<body>
<div id='chart_div' style='width: 900px; height: 600px;'></div>
</body>
</html>
1 回答
你应该使用带有Chartwrapper的仪表板作为LineChart，使用daterangefilter作为ControlWrapper，而不是像你一样初始化图表（你甚至不调用daterangefilter） .