Amcharts5堆叠条形图中的可点击标签

Question

我试图添加到堆叠条形图的能力，点击标签在左边的图表，但没有效力。在互联网上有一些关于如何向标签添加链接的帖子，但是它们是为Amcharts4而不是在Amcharts5上工作的。

我有这样一个图表：https://www.amcharts.com/demos/stacked-bar-chart/和我希望左边的标签"2021“、"2022”和"2023“是可点击的(有任何链接)。

尝试使用渲染器执行此操作失败(可能是在错误的元素上)，在标签中插入HTML会导致HTML代码显示，而不是在链接上解释。

以下是该网站的代码：

import am4themes_https://cdn.amcharts.com/lib/5/Animated from "@amcharts/amcharts4/themes/https://cdn.amcharts.com/lib/5/Animated";

/* Chart code */
// Create root element
// https://www.amcharts.com/docs/v5/getting-started/#Root_element
let root = am5.Root.new("chartdiv");

// Set themes
// https://www.amcharts.com/docs/v5/concepts/themes/
root.setThemes([
  am5themes_Animated.new(root)
]);

// Create chart
// https://www.amcharts.com/docs/v5/charts/xy-chart/
let chart = root.container.children.push(am5xy.XYChart.new(root, {
  panX: false,
  panY: false,
  wheelX: "panY",
  wheelY: "zoomY",
  layout: root.verticalLayout
}));

// Add scrollbar
// https://www.amcharts.com/docs/v5/charts/xy-chart/scrollbars/
chart.set("scrollbarY", am5.Scrollbar.new(root, {
  orientation: "vertical"
}));

let data = [{
  "year": "2021",
  "europe": 2.5,
  "namerica": 2.5,
  "asia": 2.1,
  "lamerica": 1,
  "meast": 0.8,
  "africa": 0.4
}, {
  "year": "2022",
  "europe": 2.6,
  "namerica": 2.7,
  "asia": 2.2,
  "lamerica": 0.5,
  "meast": 0.4,
  "africa": 0.3
}, {
  "year": "2023",
  "europe": 2.8,
  "namerica": 2.9,
  "asia": 2.4,
  "lamerica": 0.3,
  "meast": 0.9,
  "africa": 0.5
}]

// Create axes
// https://www.amcharts.com/docs/v5/charts/xy-chart/axes/
let yAxis = chart.yAxes.push(am5xy.CategoryAxis.new(root, {
  categoryField: "year",
  renderer: am5xy.AxisRendererY.new(root, {}),
  tooltip: am5.Tooltip.new(root, {})
}));

yAxis.data.setAll(data);

let xAxis = chart.xAxes.push(am5xy.ValueAxis.new(root, {
  min: 0,
  renderer: am5xy.AxisRendererX.new(root, {})
}));


// Add legend
// https://www.amcharts.com/docs/v5/charts/xy-chart/legend-xy-series/
let legend = chart.children.push(am5.Legend.new(root, {
  centerX: am5.p50,
  x: am5.p50
}));

// Add series
// https://www.amcharts.com/docs/v5/charts/xy-chart/series/
function makeSeries(name, fieldName) {
  let series = chart.series.push(am5xy.ColumnSeries.new(root, {
    name: name,
    stacked: true,
    xAxis: xAxis,
    yAxis: yAxis,
    baseAxis: yAxis,
    valueXField: fieldName,
    categoryYField: "year"
  }));

  series.columns.template.setAll({
    tooltipText: "{name}, {categoryY}: {valueX}",
    tooltipY: am5.percent(90)
  });
  series.data.setAll(data);

  // Make stuff animate on load
  // https://www.amcharts.com/docs/v5/concepts/animations/
  series.appear();

  series.bullets.push(function () {
    return am5.Bullet.new(root, {
      sprite: am5.Label.new(root, {
        text: "{valueX}",
        fill: root.interfaceColors.get("alternativeText"),
        centerY: am5.p50,
        centerX: am5.p50,
        populateText: true
      })
    });
  });

  legend.data.push(series);
}

makeSeries("Europe", "europe");
makeSeries("North America", "namerica");
makeSeries("Asia", "asia");
makeSeries("Latin America", "lamerica");
makeSeries("Middle East", "meast");
makeSeries("Africa", "africa");

// Make stuff animate on load
// https://www.amcharts.com/docs/v5/concepts/animations/
chart.appear(1000, 100);

(如有任何建议，我将不胜感激:)

Answer 1

正如文档中提到的那样。如果我们想要使标签互动性，我们需要添加一个背景到它。

背景不一定是可见的:我们只需设置它的fillOpacity: 0以使其完全透明。

尝试如下：

yAxis.get("renderer").labels.template.setup = function(target) {
  target.set("background", am5.Rectangle.new(root, {
    fill: am5.color(0xff0000),
     fillOpacity: 0
  }))
}

yAxis.get("renderer").labels.template.events.on("click", function(ev) {
  console.log("Label", ev.target);
});

工作实例

Answer 2

我以前只是创建了我自己的点击事件，同时防止任何默认情况下可能发生的图表。您可以在实例化后将单击事件添加到AM图表中，然后只需使单击打开一个模式或工具或其他什么，您可以使用CSS来正确定位它。