如何获得条形图中条形的X和Y的起点

Question

我有一个条形图，其中我调用一个javascript函数来对条形图的鼠标单击进行一些操作，我想获得我单击的同一条形图的X和Y轴的起点，我可以这在融合图中，如果是，怎么办？

我用黄色突出显示，我需要根据屏幕的位置。

Answer 1

是的，当您点击条形图时，可以获得关于图表尺寸的x和y坐标。

您需要使用FusionCharts“ dataPlotClick”事件API，该事件API在您单击图中的任意位置时都会触发。然后，在事件函数参数中，可以使用预定义的属性“ chartX”和“ chartY”来获取单击点的x和y坐标。

请查看文档链接以获取参考：https://www.fusioncharts.com/dev/api/fusioncharts/fusioncharts-events#dataplotclick-261

还找到一个样本提琴供参考：https://jsfiddle.net/mf1qh9ku/1/

FusionCharts.ready(function() {
var revenueChart = new FusionCharts({
type: 'bar2d',
renderAt: 'chart-container',
width: '500',
height: '350',
dataFormat: 'json',
dataSource: {
  "chart": {
    "caption": "Monthly revenue for last year",
    "subCaption": "Harry's SuperMart",
    "xAxisName": "Month",
    "yAxisName": "Revenue (In USD)",
    "numberPrefix": "$",
    "paletteColors": "#0075c2",
    "bgColor": "#ffffff",
    "borderAlpha": "20",
    "canvasBorderAlpha": "0",
    "usePlotGradientColor": "0",
    "plotBorderAlpha": "10",
    "placevaluesInside": "1",
    "rotatevalues": "1",
    "valueFontColor": "#ffffff",
    "showXAxisLine": "1",
    "xAxisLineColor": "#999999",
    "divlineColor": "#999999",
    "divLineIsDashed": "1",
    "showAlternateHGridColor": "0",
    "subcaptionFontBold": "0",
    "subcaptionFontSize": "14"
  },
  "data": [{
    "label": "Jan",
    "value": "420000"
  }, {
    "label": "Feb",
    "value": "810000"
  }, {
    "label": "Mar",
    "value": "720000"
  }, {
    "label": "Apr",
    "value": "550000"
  }, {
    "label": "May",
    "value": "910000"
  }, {
    "label": "Jun",
    "value": "510000"
  }, {
    "label": "Jul",
    "value": "680000"
  }, {
    "label": "Aug",
    "value": "620000"
  }, {
    "label": "Sep",
    "value": "610000"
  }, {
    "label": "Oct",
    "value": "490000"
  }, {
    "label": "Nov",
    "value": "900000"
  }, {
    "label": "Dec",
    "value": "730000"
  }]
},
"events": {
  "dataPlotClick": function(eventObj, dataObj) {
    alert("X : " + eventObj.data.chartX + ", Y : " + eventObj.data.chartY);
  }
}
}).render();
});