Question

我正在尝试将与数据集相关的标签放在气泡图上的一个点下方，并将值显示在该点的顶部。

我尝试过返回两个不同的值，但它只允许我返回一个。

因此我在同一个字符串中返回了两个值。

是否可以返回标签并将其放置在数据集的值下方并将值放在数据集的点之上？

如果不可能，我可以以某种方式让文字在换行符后与中心对齐我已添加到字符串中吗？

This is what I am trying to achieve, but with the value above the bubble

到目前为止，这是我的代码：

var ctx = document.getElementById('myChart').getContext('2d');

var myChart = new Chart(ctx, {

    type: 'bubble',

    data: {
        datasets: [
            {
                label: 'Top',
                data: [
                    {x: 110, y: 0, r: 12, name: "Performance"}
                ],
                backgroundColor: "rgba(255,255,255,1)",
                borderColor: "rgba(91,182,209,1)",
                borderWidth: 2,
                hoverBackgroundColor: "rgba(255,255,255,1)",
                hoverBorderWidth : 2
            },
            {
                label: 'Average',
                data: [
                    {x: 75, y: 0, r: 12, name: "Performance"}
                ],
                backgroundColor: "rgba(255,255,255,1)",
                borderColor: "rgba(91,182,209,1)",
                borderWidth: 2,
                hoverBackgroundColor: "rgba(255,255,255,1)",
                hoverBorderWidth : 2
            },
            {
                label: 'You 2017',
                data: [
                    {x: 55, y: 0, r: 15, name: "Performance"}
                ],
                backgroundColor: "rgba(255,255,255,1)",
                borderColor: "rgba(91,182,209,1)",
                borderWidth: 2,
                hoverBackgroundColor : "rgba(255,255,255,1)",
                hoverBorderWidth : 2
            },
            {
                label: 'You 2018',
                data: [
                    {x: 90, y: 0, r: 15, name: "Performance"} // The labe needs to be
                ],
                backgroundColor: "rgba(255,255,255,1)",
                borderColor: "rgba(91,182,209,1)",
                borderWidth: 2,
                hoverBackgroundColor : "rgba(255,255,255,1)",
                hoverBorderWidth : 2
            }
        ]
    },
    options: {
        legend: {
            display: false
        },
        plugins: {
            datalabels: {
                anchor: function (context) {
                    var value = context.dataset.data[context.dataIndex];
                    return value.x < 1000 ? 'end' : 'center';
                },
                align: function (context) {
                    var value = context.dataset.data[context.dataIndex];
                    return value.x < 1000 ? 'end' : 'center';
                },
                color: function (context) {
                    var value = context.dataset.data[context.dataIndex];
                    return value.x < 1000 ? context.dataset.borderColor : 'white';
                },
                font: {
                    weight: 'bold'
                },
                formatter: function (value, context) {
                    ctx.textAlign = "center";
                    return context.dataset.label + "\n" + Math.round(value.x);
                },
                offset: 2,
                padding: 0
            }
        },
        maintainAspectRatio: false,
        scales: {
            yAxes: [{
                id: 'first-y-axis',
                type: 'linear',
                ticks: {
                    min: 0,
                    max: 1,
                    stepSize: 1,
                    display: false
                },
                gridLines: {
                    display: false,
                    drawBorder: false
                }
            }],
            xAxes: [
                {
                    id: 'first-x-axis',
                    ticks: {
                        min: 50, // Controls where axis starts
                        max: 120, // Controls where axis finishes
                        stepSize: 70 // Control the gap between the first x-axis value and the last x-axis value
                    },
                    gridLines: {
                        display: false,
                        lineWidth: 3 // Width of bottom line
                    }
                }
            ]

        }
    }

});

非常感谢任何帮助或建议^ _ ^

Answer 1

我通过在图表参数中应用'textAlign'并将其设置为居中来解决这个问题。

您可以在下面的代码中看到：

plugins: {
    datalabels: {
        anchor: function (context) {
            var value = context.dataset.data[context.dataIndex];
            return value.x < 1000 ? 'end' : 'center';
        },
        align: function (context) {
            var value = context.dataset.data[context.dataIndex];
            return value.x < 1000 ? 'end' : 'center';
        },
        color: function (context) {
            var value = context.dataset.data[context.dataIndex];
            return value.x < 1000 ? context.dataset.borderColor : 'white';
        },
        textAlign: 'center',
        font: {
            weight: 'bold',
            alignment: 'right' // Is this the place to be doing this?
        },
        formatter: function (value, context) {
            return context.dataset.label + '\n' + Math.round(value.x);
        },
        offset: 2,
        padding: 0
    }
},

希望这有助于^^

将数据标签对齐在气泡图上的点下方（Chart.JS）

1 个答案: