Chart.js v2.6:向饼图输出值添加箭头

Question

我使用Chart.js v2.6输出饼图.数据从MySQL数据库获得.图表正确呈现,但我需要向数据值添加箭头,如下面的屏幕截图所示.

带箭头的示例饼图:

下面是我使用Chart.js输出饼图的代码:

var chartdata_order_status = {
    labels: status,
    datasets: [{
        label: 'Order status',
        backgroundColor: ["#00b0f0","#92d050","#ffc000","#ff6dd9"],
        data: count_status
    }]
};

var pieGraph = new Chart(ctx3, {
    type: 'pie',
    data: chartdata_country_orders,
    options: {
        pieceLabel: {
            mode: 'value',
            position: 'outside',
            fontColor: '#000',
            format: function (value) {
                return '$' + value;
            }
        },
        title: {
            display: true,
            text: 'Total Sales by Country - Top 5',
            fontSize: 15,
            fontStyle: 'bold'
        },
        legend: {
            display: true,
            position: 'bottom',
        },
    } 
});

我没有包含用于从MySQLtable获取数据的PHP代码.

Answer 1

您现在可以Chart.PieceLabel.js在 slices.s 之外使用和获取标签，

演示

angular.module("app", ["chart.js"]).controller("ChartCtrl", function($scope) {

    $scope.labels = ["January", "February", "March", "April", "May", "June", "July"];

    $scope.data = [65, 59, 80, 81, 56, 55, 40];

    $scope.options = {
      pieceLabel: {
        render: 'label',
        fontColor: '#000',
        position: 'outside',
        segment: true
      }
    };

});

angular.module("app", ["chart.js"]).controller("ChartCtrl", function($scope) {

    $scope.labels = ["January", "February", "March", "April", "May", "June", "July"];

    $scope.data = [65, 59, 80, 81, 56, 55, 40];

    $scope.options = {
      pieceLabel: {
        render: 'label',
        fontColor: '#000',
        position: 'outside',
        segment: true
      }
    };

});