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This topic contains 1 reply, has 2 voices, and was last updated by  Dimitar 8 years, 8 months ago.

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    Pie chart flickers on update Posts
  • January 27, 2016 at 4:56 pm Pie chart flickers on update #80862

    roamingstar
    Participant

    Is there a way i can avoid pie chart to flciker when it updates on a setinterval i am using refresh chart feature after updating data set with dataadapter

    January 28, 2016 at 8:56 am Pie chart flickers on update #80878

    Dimitar
    Participant

    Hello roamingstar,

    If you use the method update there will be no flickering. Please try the following example:

    <!DOCTYPE html>
<html lang="en">
<head>
    <link rel="stylesheet" href="../../jqwidgets/styles/jqx.base.css" type="text/css" />
    <script type="text/javascript" src="../../scripts/jquery-1.11.1.min.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxcore.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxdraw.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxchart.core.js"></script>
    <script type="text/javascript" src="../../jqwidgets/jqxdata.js"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            var data = [{ name: 'a', value: 10 }, { name: 'b', value: 3 }, { name: 'c', value: 7}];

            // prepare chart data as an array
            var source =
            {
                datatype: "json",
                datafields: [
                    { name: 'name' },
                    { name: 'value' }
                ],
                localdata: data
            };

            var dataAdapter = new $.jqx.dataAdapter(source, { async: false, autoBind: true, loadError: function (xhr, status, error) { alert('Error loading "' + source.url + '" : ' + error); } });

            // prepare jqxChart settings
            var settings = {
                title: "Desktop browsers share",
                description: "(source: wikipedia.org)",
                enableAnimations: true,
                showLegend: false,
                showBorderLine: true,
                legendPosition: { left: 520, top: 140, width: 100, height: 100 },
                padding: { left: 5, top: 5, right: 5, bottom: 5 },
                titlePadding: { left: 0, top: 0, right: 0, bottom: 10 },
                source: dataAdapter,
                colorScheme: 'scheme02',
                seriesGroups:
                    [
                        {
                            type: 'pie',
                            showLabels: true,
                            series:
                                [
                                    {
                                        dataField: 'value',
                                        displayText: 'name',
                                        labelRadius: 120,
                                        initialAngle: 15,
                                        radius: 170,
                                        centerOffset: 0
                                    }
                                ]
                        }
                    ]
            };

            // setup the chart
            $('#chartContainer').jqxChart(settings);

            setInterval(function () {
                var newData = [{ name: 'a', value: Math.random() * 10 }, { name: 'b', value: Math.random() * 10 }, { name: 'c', value: Math.random() * 10}]
                source.localdata = newData;
                dataAdapter.dataBind();
                $('#chartContainer').jqxChart('update');
            }, 1000);
        });
    </script>
</head>
<body class='default'>
    <div id='chartContainer' style="width: 850px; height: 500px;">
    </div>
</body>
</html>

    Best Regards,
    Dimitar

    jQWidgets team
    http://www.jqwidgets.com/

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