javascript - chart.js:在饼图外显示标签

Question

chart.js 2.6.0

我需要呈现如下所示的图表:

始终显示所有工具提示不是一种可接受的方式，因为它们不会以正确的方式呈现:

不幸的是，我还没有找到解决方案。我试过 piece-label 插件，但这有同样的问题，因为它的标签重叠，我无法隐藏某些标签。

这是代码，它使用 piece-label 将标签放置在切片上方来创建我的图表:

private createStatusChart(): void {
    const chartData = this.getStatusChartData();

    if (!chartData) {
        return;
    }

    const $container = $(Templates.Dashboard.ChartContainer({
        ContainerID: 'chart-status',
        HeaderText: 'Status'
    }));

    this._$content.append($container);

    const legendOptions =
        new Model.Charts.LegendOptions()
            .SetDisplay(false);

    const pieceLabelOptions =
        new Model.Charts.PieceLabelOptions()
            .SetRender('label')
            .SetPosition('outside')
            .SetArc(true)
            .SetOverlap(true);

    const options =
         new Model.Charts.Options()
             .SetLegend(legendOptions)
             .SetPieceLabel(pieceLabelOptions);

    const chartDefinition = new Model.Charts.Pie(chartData, options);
    const ctx = this._$content.find('#chart-status canvas').get(0);

    const chart = new Chart(ctx, chartDefinition);
}

private getStatusChartData(): Model.Charts.PieChartData {
    if (!this._data) {
        return;
    }

    const instance = this;
    const data: Array<number> = [];
    const labels: Array<string> = [];
    const colors: Array<string> = [];

    this._data.StatusGroupings.forEach(sg => {
        if (!sg.StatusOID) {
            data.push(sg.Count);
            labels.push(i18next.t('Dashboard.NoStateSet'));
            colors.push('#4572A7');

            return;
        }

        const status = DAL.Properties.GetByOID(sg.StatusOID);

        data.push(sg.Count);
        labels.push(status ? status.Title : i18next.t('Misc.Unknown'));
        colors.push(status ? status.Color : '#fff');
    });

    const dataset = new Model.Charts.Dataset(data).setBackgroundColor(colors);

    return new Model.Charts.PieChartData(labels, [dataset]);
}

结果:

Answer 1

有一个新插件(自一年以来)，称为 chartjs-plugin-piechart-outlabels

只需导入源代码
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-piechart-outlabels"></script>
并将其与 outlabeledPie 类型一起使用

var randomScalingFactor = function() {
return Math.round(Math.random() * 100);
};
var ctx = document.getElementById("chart-area").getContext("2d");
var myDoughnut = new Chart(ctx, {
type: 'outlabeledPie',
data: {
labels: ["January", "February", "March", "April", "May"],
...
plugins: {
        legend: false,
        outlabels: {
           text: '%l %p',
           color: 'white',
           stretch: 45,
           font: {
               resizable: true,
               minSize: 12,
               maxSize: 18
           }
        }
     }
})