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<!DOCTYPE html>
<html lang="en">
<head>
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<script type="text/javascript">
google.charts.load('current', {'packages':['gauge']});
google.charts.setOnLoadCallback(drawGauge);
var gaugeOptions = {min: 0, max: 280, yellowFrom: 200, yellowTo: 250,
redFrom: 250, redTo: 280, minorTicks: 5};
var gauge;
function drawGauge() {
gaugeData = new google.visualization.DataTable();
gaugeData.addColumn('number', 'Engine');
gaugeData.addColumn('number', 'Rotation');
gaugeData.addRows(2);
gaugeData.setCell(0, 0, 120);
gaugeData.setCell(0, 1, 80);
gauge = new google.visualization.Gauge(document.getElementById('gauge_div'));
gauge.draw(gaugeData, gaugeOptions);
}
function changeTemp(dir) {
gaugeData.setValue(0, 0, gaugeData.getValue(0, 0) + dir * 25);
gaugeData.setValue(0, 1, gaugeData.getValue(0, 1) + dir * 20);
gauge.draw(gaugeData, gaugeOptions);
}
</script>
</head>
<body>
<div id="gauge_div" style="width:280px; height: 140px;"></div>
<input type="button" value="Go Faster" onclick="changeTemp(1)" />
<input type="button" value="Slow down" onclick="changeTemp(-1)" />
</body>
</html> |
Wat zijn de voor- en nadelen van de verschillende geïmplementeerde API's?
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