test/custom-children-remove.html

<!DOCTYPE html>
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<html>
    <head>
        <meta charset="utf-8">
        <script src="lib/simpleRequire.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>
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <link rel="stylesheet" href="lib/reset.css">
    </head>
    <body>
        <style>
            h1 {
                line-height: 60px;
                height: 60px;
                background: #146402;
                text-align: center;
                font-weight: bold;
                color: #eee;
                font-size: 14px;
            }
            .chart {
                height: 500px;
            }
        </style>


        <div class="chart" id="main"></div>




        <script>

            var echarts;
            var chart;
            var myChart;
            var groupCategories = [];
            var groupColors = [];

            require([
                'echarts'
            ], function (ec) {
                echarts = ec;
                chart = myChart = echarts.init(document.getElementById('main'));

                var data = [
                    {name:'广州', value: 50},
                    {name:'深圳', value: 72},
                    {name:'珠海', value: 30},
                    {name:'佛山', value: 38},
                    {name:'杭州', value: 42},
                    {name:'舟山', value: 32},
                    {name:'宁波', value: 52}
                ];


                option = {
                    tooltip : {
                        trigger: 'item'
                    },
                    legend: {
                        data:['广州','深圳','珠海','佛山','杭州','舟山','宁波'],
                        top: 0,
                        left: 'center'
                    },
                    xAxis : [
                        {
                            type : 'category',
                            data : [0],
                            axisTick: {show: false},
                            axisLabel: {show: false}
                        },
                    ],
                    yAxis : [
                        {
                            type : 'value'
                        }
                    ],
                    series : echarts.util.map(data, function (item) {
                        return {
                            name: item.name,
                            type: 'bar',
                            label: {
                                normal: {
                                    show: true,
                                    position: 'bottom',
                                    formatter: function (param) {
                                        return param.seriesName;
                                    }
                                }
                            },
                            data: [item.value]
                        }
                    }).concat([{
                        type: 'custom',
                        renderItem: renderProvinceName,
                        data: [0]
                    }])
                };

                function renderProvinceName(param, api) {
                    var currentSeriesIndices = api.currentSeriesIndices();
                    currentSeriesIndices.pop(); // remove custom series;

                    var barLayout = api.barLayout({
                        count: currentSeriesIndices.length
                    });

                    var nameTexts = echarts.util.map(currentSeriesIndices, function (serIdx, index) {
                        var point = api.coord([0, 0]);
                        point[0] += barLayout[index].offsetCenter;
                        point[1] = api.getHeight() - 20;

                        return {
                            position: point,
                            name: serIdx,
                            type: 'circle',
                            shape: {
                                cx: 0, cy: 0, r: 10
                            },
                            style: {
                                text: serIdx,
                                fill: '#333',
                                textFill: '#eee',
                                stroke: null
                            }
                        };
                    });

                    return {
                        type: 'group',
                        $mergeChildren: 'byName',
                        children: nameTexts
                    };
                }

                chart.setOption(option);
            });

        </script>
    </body>
</html>