Javascript AmCharts：如何访问图例中显示的值

我试图在使用ChartCursor将鼠标悬停在图表上时操作图例中显示的值（我已为其连接了侦听器函数，但似乎无法找到每个对象如何显示图例中的每个当前值）：

我已尝试使用valueText访问

chart.legend.valueText

但是，如果替换valueText，图例中的每个对象都会出现值集。我希望能够接触到图例中的每个对象，并能够操纵每个对象的valueText

侦听器在chartCursor中实现：

"chartCursor": {
        "categoryBalloonEnabled": false,
        "listeners": [{
          "event": "changed",
          "method": cursorChanged
        }]
      },

有人知道如何做到这一点吗

---

谢谢

要访问图例值，必须在图例对象内部创建一个：

    "legend": {
        // ...
        "valueFunction": function(graphDataItem, valueText) {
            //check if valueText is empty. 
            //this only occurs when you're not currently hovered over a value
            //and if you don't have a periodValueText set.
          if (valueText !== " ") { 
            //access the current graph's value through the graph.valueField 
            //inside the graphDataItem parameter, 
            //or the string version of the value in valueText and manipulate it accordingly
            return graphDataItem.dataContext[graphDataItem.graph.valueField]; //current hovered value
          } else {
           return valueText; 
          }
        }
    },

为每个具有可见图例标记的图形对象调用

valueFunction

---

要访问图例值，必须在图例对象内部创建一个：

    "legend": {
        // ...
        "valueFunction": function(graphDataItem, valueText) {
            //check if valueText is empty. 
            //this only occurs when you're not currently hovered over a value
            //and if you don't have a periodValueText set.
          if (valueText !== " ") { 
            //access the current graph's value through the graph.valueField 
            //inside the graphDataItem parameter, 
            //or the string version of the value in valueText and manipulate it accordingly
            return graphDataItem.dataContext[graphDataItem.graph.valueField]; //current hovered value
          } else {
           return valueText; 
          }
        }
    },

为每个具有可见图例标记的图形对象调用

valueFunction