Gauge Charts

Gauge charts are percentage-based. A gauge chart shows where percentage-based data falls over a given range. Each data set must be defined as a new instance of the SingleValueColumn object. Follow these steps to configure your portlet to use gauge charts.

Import the chart taglib along with the GaugeChartConfig and SingleValueColumn classes into your bundle’s init.jsp file:

<%@ taglib prefix="chart" uri="http://liferay.com/tld/chart" %>
<%@ page import="com.liferay.frontend.taglib.chart.model.gauge.GaugeChartConfig" %>
<%@ page import="com.liferay.frontend.taglib.chart.model.SingleValueColumn" %>

Add the following Java scriptlet to the top of your view.jsp:

<%
GaugeChartConfig _gaugeChartConfig = new GaugeChartConfig();

_gaugeChartConfig.addColumn(
  new SingleValueColumn("data1", 85.4)
);
%>

Add the <chart> taglib to the view.jsp, passing the _gaugeChartConfig as the config attribute’s value:
```
<chart:gauge
  config="<%= _gaugeChartConfig %>"
/>
```