pie-label.html

<!DOCTYPE html>
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<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <script src="lib/esl.js"></script>
        <script src="lib/config.js"></script>
        <script src="lib/jquery.min.js"></script>
        <script src="lib/facePrint.js"></script>
        <script src="lib/testHelper.js"></script>
        <link rel="stylesheet" href="lib/reset.css" />
    </head>
    <body>
        <style>
            .test-title {
                background: #146402;
                color: #fff;
            }
        </style>


        <div id="main0"></div>
        <div id="main1"></div>


        <script>

            require([
                'echarts'/*, 'map/js/china' */
            ], function (echarts) {

                var value2 = 400;
                var total = 1000;

                function getData() {
                    return [{
                        name: '',
                        value: total - value2,
                        itemStyle: { color: 'rgb(8,90,150)' },
                        label: { show: false }
                    }, {
                        name: '50%',
                        value: value2,
                        itemStyle: { color: 'rgb(23,235,255)'},
                        label: { position: 'center', color: '#999', fontSize: '100' }
                    }]
                }

                var option = {
                    animation: false,
                    series: [{
                        type: 'pie',
                        radius: ['60%','80%'],
                        labelLine: { show: false },
                        hoverAnimation: false,
                        data: getData()
                    }]
                };

                var chart = testHelper.create(echarts, 'main0', {
                    title: 'Label should be always at center of the pie',
                    option: option,
                    info: {
                        data: [{
                            label: {position: 'center'}
                        }]
                    }
                });

                setInterval(function () {
                    value2 += 3;
                    if (value2 > total) {
                        value2 = 0;
                    }
                    chart.setOption({
                        series: [{
                            data: getData()
                        }]
                    });
                }, 20);
            });

        </script>


        <script>

            require([
                'echarts'/*, 'map/js/china' */
            ], function (echarts) {

                var count = 60;
                var data = [];
                for (var i = 0; i < count; i++) {
                    var label = i === 30
                        ? {
                            position: 'center',
                            fontSize: 30,
                            color: '#fff'
                        }
                        : null;
                    data.push({
                        name: i + 'A',
                        value: Math.random(),
                        label: label
                    });
                }

                var option = {
                    series: [{
                        type: 'pie',
                        radius: '50%',
                        data: data
                    }]
                };

                var chart = testHelper.create(echarts, 'main1', {
                    title: 'Too many',
                    option: option
                });
            });

        </script>


    </body>
</html>