如何在特定数据标签上的chart.js中隐藏工具提示？

Question

我试图在click.js中隐藏工具提示,只要点击对象的名称是"Something".我已经尝试过了:

  this.doughnutChart = new Chart(this.doughnutCanvas.nativeElement, {
  type: 'doughnut',
  data: {
    datasets: [{
      label: _.map(this.dataService.AmTimeSlots, 'ProjectName'),
      data: _.map(this.dataService.AmTimeSlots, 'Duration'),
      backgroundColor: _.map(this.dataService.AmTimeSlots, 'Color'),
      hoverBackgroundColor: _.map(this.dataService.AmTimeSlots, 'HoverColor'),
      borderColor: _.map(this.dataService.AmTimeSlots, 'BorderColor'),
      borderWidth: 1.5
    },
    {
      label: _.map(this.dataService.PmTimeSlots, 'ProjectName'),
      data: _.map(this.dataService.PmTimeSlots, 'Duration'),
      backgroundColor: _.map(this.dataService.PmTimeSlots, 'Color'),
      hoverBackgroundColor: _.map(this.dataService.PmTimeSlots, 'HoverColor'),
      borderColor: _.map(this.dataService.PmTimeSlots, 'BorderColor'),
      borderWidth: 1.5
    }],
  },
  options: {
    elements: {
      arc: {
        roundedCornersFor: 0
      }
    },
    segmentShowStroke: false,
    responsive: true,
    maintainAspectRatio: true,
    legend: {
      display: false
    },
    onClick: this.chartClick.bind(this),
    cutoutPercentage: 65,
    tooltips: {
      filter: function (tooltipItem) {
        if (tooltipItem.xLabel == "Free Slot") {
          return false;
        } else {
          return true;
        }
      },
      callbacks: {
        label: function (tooltipItems, data) {
        return data.datasets[tooltipItems.datasetIndex].label[tooltipItems.index];
        },
        afterLabel: function (tooltipItems, data) {               
        return Math.floor(data.datasets[tooltipItems.datasetIndex].data[tooltipItems.index] / 6) + 'h ' + data.datasets[tooltipItems.datasetIndex].data[tooltipItems.index] * 10 % 60 + 'm';          
        }
      }
    }
  },
  config: {
    data: this.dataService,
    settings: this.settingsService
  }
});

上面的代码工作正常,它成功地隐藏了工具提示的文本,但问题是黑色标签/边框仍然存在.如何隐藏它？

Answer 1

您只需过滤工具提示即可:

options: {
    tooltips: {
       filter: function (tooltipItem, data) {
           var label = data.labels[tooltipItem.index];
           if (label == "Red") {
             return false;
           } else {
             return true;
           }
       }
    }
}

看到这个jsfiddle:https://jsfiddle.net/beaver71/ndc2uao2/

Answer 2

Chart.js 3 更新：

options: {
  plugins: {
    tooltip: {
       filter: function (tooltipItem, data) {
           return tooltipItem.label === "Red";
       }
    }
  }
}