Show Overlay while the Chart Is Loading
Environment
| Product | Progress® Kendo UI® Chart for jQuery |
| Operating System | Windows 10 64bit |
| Visual Studio Version | Visual Studio 2017 |
| Preferred Language | JavaScript |
Description
Sometimes the loading of my Chart takes longer time than the user expects. How can I set an overlay for the Chart while it is loading?
Solution
For such scenarios, you can configure the Kendo UI Chart to show the progress of the process.
The following example demonstrates how to display a loading indicator while the data of a Kendo UI Chart is loading. The loading indicator is cleared in the render event.
For Kendo UI versions prior to 2014.3.1119, replace it with the
dataBoundevent.
<div class="chart-wrap" style="position: relative;">
<div id="chart"></div>
<div class="chart-loading"></div>
</div>
<script>
var ds = new kendo.data.DataSource({
transport: {
read: function(e) {
// Delay response to simulate remote data
setTimeout(function() {
e.success([{
value: 1
}, {
value: 2
}, {
value: 3
}]);
}, 2000);
}
}
});
$("#chart").kendoChart({
dataSource: ds,
series: [{
field: "value"
}],
render: function(e) {
// Clear up the loading indicator for this chart
var loading = $(".chart-loading", e.sender.element.parent());
kendo.ui.progress(loading, false);
}
});
$(document).ready(function() {
// Spin all loading indicators on the page
kendo.ui.progress($(".chart-loading"), true);
});
</script>