I'm working on a google visualizations pie chart and want each individual slice to link to a different page. I know there's another question already very similar to this, but I don't understand the answer. I've worked a bit with HTML and CSS but this is the first thing I've done in JavaScript and I'm definitely lost. I want my user to be able to click on a slice of the chart and then be taken to a new page. The page needs to be different for each slice of the chart if possible. Thank you! Here's my code:
<html>
<head>
<html>
<head>
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<script type="text/javascript">
google.charts.load('current', {'packages':['corechart']});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = google.visualization.arrayToDataTable([
['Field', 'Number of Proposals'],
['Sustainability', 242],
['Education', 699],
['Information Technology', 240],
['Health & Wellness', 247],
['Community Development', 353],
['Public Policy', 138],
['Equity', 276],
['Food & Water', 131],
['Energy', 84],
['Security (Cyber & Other)', 56],
]);
var options = {'width': 1200,
'height': 700,
colors: ['#8C1D40', '#FFC627', '#6F6F6F', '#935669', '#FFDA74', '#919191', '#96757F', '#FEE9B0', '#BBBBBB', '#DEDEDE']
};
var chart = new google.visualization.PieChart(document.getElementById('piechart'));
chart.draw(data, options);
google.visualization.events.addListener (chart, 'select', function(){
var selection = chart.getSelection();
console.log(selection);
});
}
</script>
</head>
<body>
<div id="piechart" style="width: 900px; height: 500px;"></div>
</body>
</html>
first, chart events should be added before the chart is drawn.
var chart = new google.visualization.PieChart(document.getElementById('piechart'));
google.visualization.events.addListener(chart, 'select', function() {
...
});
chart.draw(data, options);
next, the 'select' event fires both when a slice is selected, clicked.
and un-selected when clicked again.
so we must check the length of the selection,
before trying to access the contents of the selection.
var selection = chart.getSelection();
if (selection.length > 0) { // <-- check length of the selection
}
finally, we need a way to assign the page url to the slice.
here, json format is used to assign a data table property (p:) to the slice label.
[{v: 'Sustainability', p: {url: 'http://www.google.com'}}, 242],
[{v: 'Education', p: {url: 'http://www.bing.com'}}, 699],
[{v: 'Information Technology', p: {url: 'http://www.yahoo.com'}}, 699],
then in the select event, we can get the property from the selection and open the page.
var url = data.getProperty(selection[0].row, 0, 'url');
window.open(url, '_blank'); // <-- remove '_blank' to open the page in the same window
see following working snippet...
note: window.open does not work from here, within the snippet,
but it should work on your page.
google.charts.load('current', {'packages':['corechart']});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = google.visualization.arrayToDataTable([
['Field', 'Number of Proposals'],
[{v: 'Sustainability', p: {url: 'http://www.google.com'}}, 242],
[{v: 'Education', p: {url: 'http://www.bing.com'}}, 699],
[{v: 'Information Technology', p: {url: 'http://www.yahoo.com'}}, 699],
]);
var options = {'width': 1200,
height: 700,
colors: ['#8C1D40', '#FFC627', '#6F6F6F', '#935669', '#FFDA74', '#919191', '#96757F', '#FEE9B0', '#BBBBBB', '#DEDEDE']
};
var chart = new google.visualization.PieChart(document.getElementById('piechart'));
google.visualization.events.addListener(chart, 'select', function() {
var selection = chart.getSelection();
if (selection.length > 0) {
var url = data.getProperty(selection[0].row, 0, 'url');
console.log(url);
window.open(url, '_blank');
}
});
chart.draw(data, options);
}<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="piechart"></div>