Question

Flex的AreaChart错误是什么，有人知道如何修复它吗？它会导致一个工具提示显示minFields的错误值。

即。为：

<mx:AreaSeries yField="TotalVariableCost" minField="TotalFixedCost" displayName="Total Cost">

它会显示：

Total Cost
high: TotalVariableCost
low: TotalVariableCost

相反：

Total Cost
high: TotalVariableCost
low: TotalFixedCost

这个错误假设在AreaSeries.as的2058到2083行 - 但这些东西超出了我的理解范围。

斯蒂芬 -

Answer 1

是的，这是AreaSeries中的一个错误。由于设计了柔性图表的愚蠢方式，唯一真正的解决方法是在AreaChart上设置自定义dataTipFunction。

以下是修复错误的相关代码的副本：

/**
 * Create a data tip function for the given AreaSeries. Uses a copy of
 * the formatDataTip code from AreaSeries with the minValue bug fixed.
 * 
 * @param series
 * @return a data tip function
 * 
 */
private function createAreaSeriesTipFunc(series:AreaSeries):Function {
   var displayName:String = series.displayName;
   var dataTransform:DataTransform = series.dataTransform;
   var xField:String = series.xField;
   var minField:String = series.minField;

   // formatDataTip relies on AreaSeries member data so simulate that
   // with a closure to minimize code modifications

   return function(hd:HitData):String {
      var dt:String = "";
      var n:String = displayName;
      if (n && n != "")
         dt += "<b>"+ n + "</b><BR/>";

      var xName:String = dataTransform.getAxis(CartesianTransform.HORIZONTAL_AXIS).displayName;
      if (xName == "")
         xName = xField;
      if (xName != "")
         dt += "<i>" + xName + ": </i>";

      var item:AreaSeriesItem = AreaSeriesItem(hd.chartItem);
      var lowItem:AreaSeriesItem = (minField != "") ?
         item :
         null;
      dt += dataTransform.getAxis(CartesianTransform.HORIZONTAL_AXIS).formatForScreen(item.xValue) + "\n";

      var yName:String = dataTransform.getAxis(CartesianTransform.VERTICAL_AXIS).displayName;

      if (!lowItem)
      {
         if (yName != "")
            dt += "<i>" + yName + ":</i> ";
         dt += dataTransform.getAxis(CartesianTransform.VERTICAL_AXIS).formatForScreen(item.yValue) + "\n";
      }
      else
      {
         if (yName != "")
            dt += "<i>" + yName + " (high):</i> ";
         else
            dt += "<i>high: </i>";
         dt += dataTransform.getAxis(CartesianTransform.VERTICAL_AXIS).formatForScreen(item.yValue) + "\n";

         if (yName != "")
            dt += "<i>" + yName + " (low):</i> ";
         else
            dt += "<i>low:</i> ";
         dt += dataTransform.getAxis(CartesianTransform.VERTICAL_AXIS).formatForScreen(lowItem.minValue) + "\n";
      }

      return dt;
   };
}

我刚刚在一个地方将formatForScreen(lowItem.yValue)更改为formatForScreen(lowItem.minValue)。您可以像这样使用它：

<mx:AreaChart dataProvider="{chartData}" showDataTips="true" dataTipFunction="{createAreaSeriesTipFunc(areaSeries)}">
      <mx:series>
         <mx:AreaSeries id="areaSeries" yField="TotalVariableCost" minField="TotalFixedCost" displayName="Total Cost" />
      </mx:series>
</mx:AreaChart>

Flex的AreaChart错误

1 个答案: