javascript - Chart JS 自定义工具提示选项？

Question

我正在尝试使用 Chart.Js 构建图表。这个 chart.js 有工具提示的默认选项，我想定制工具提示选项。有没有办法让它成为可能？

这是我的代码

 var chart = null;
barChart: function (data1, data2, data3, label) {

    var data = {
        labels: label,
        datasets: [
        {
            fillColor: "rgba(220,220,220,0.5)",
            strokeColor: "rgba(220,220,220,0.8)",
            highlightFill: "rgba(220,220,220,0.75)",
            highlightStroke: "rgba(220,220,220,1)",
            data: data1
        },
         {
             fillColor: "rgba(151,187,205,0.5)",
             strokeColor: "rgba(151,187,205,0.8)",
             highlightFill: "rgba(151,187,205,0.75)",
             highlightStroke: "rgba(151,187,205,1)",
             data: data2
         },
          {
              fillColor: "rgba(0,255,0,0.3)",
              strokeColor: "rgba(220,220,220,0.8)",
              highlightFill: "rgba(220,220,220,0.75)",
              highlightStroke: "rgba(0,255,0,0.3)",
              data: data3
          },
        ]
    }
    var cht = document.getElementById('exampleCanvas');
    var ctx = cht.getContext('2d');
    if (chart)
        chart.destroy();
    chart = new Chart(ctx).Bar(data);
}

Answer 1

试试这个:

您可以使用此代码在全局范围内进行更改:

Chart.defaults.global = {

    // Boolean - Determines whether to draw tooltips on the canvas or not
    showTooltips: true,

    // Array - Array of string names to attach tooltip events
    tooltipEvents: ["mousemove", "touchstart", "touchmove"],

    // String - Tooltip background colour
    tooltipFillColor: "rgba(0,0,0,0.8)",

    // String - Tooltip label font declaration for the scale label
    tooltipFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",

    // Number - Tooltip label font size in pixels
    tooltipFontSize: 14,

    // String - Tooltip font weight style
    tooltipFontStyle: "normal",

    // String - Tooltip label font colour
    tooltipFontColor: "#fff",

    // String - Tooltip title font declaration for the scale label
    tooltipTitleFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",

    // Number - Tooltip title font size in pixels
    tooltipTitleFontSize: 14,

    // String - Tooltip title font weight style
    tooltipTitleFontStyle: "bold",

    // String - Tooltip title font colour
    tooltipTitleFontColor: "#fff",

    // Number - pixel width of padding around tooltip text
    tooltipYPadding: 6,

    // Number - pixel width of padding around tooltip text
    tooltipXPadding: 6,

    // Number - Size of the caret on the tooltip
    tooltipCaretSize: 8,

    // Number - Pixel radius of the tooltip border
    tooltipCornerRadius: 6,

    // Number - Pixel offset from point x to tooltip edge
    tooltipXOffset: 10,

    // String - Template string for single tooltips
    tooltipTemplate: "<%if (label){%><%=label%>: <%}%><%= value %>",

    // String - Template string for single tooltips
    multiTooltipTemplate: "<%= value %>",

    // Function - Will fire on animation progression.
    onAnimationProgress: function(){},

    // Function - Will fire on animation completion.
    onAnimationComplete: function(){}
}

使用这个 Link供引用