我们从多个提要中获取数据,并且数据在特定日期可能存在也可能不存在。因此,对于没有数据的点,我们发送 NaN。
问题:在下面的代码中,有没有办法不显示那些为空的数据提示。我添加了一个数据提示功能,但它确实显示了一个小空方块,是否有可能甚至不显示?
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script><![CDATA[
import mx.charts.HitData;
import mx.collections.ArrayCollection;
[Bindable]
public var DS:ArrayCollection = new ArrayCollection([
{date:"22-Aug-05", expense:1575.9, tax:41.87, price: 4},
{date:"23-Aug-05", expense:NaN, tax:NaN,price: 4},
{date:"24-Aug-05", expense:1507.1, tax:42.77,price:5 },
{date:"25-Aug-05", expense:1568.8 ,tax:48.06, price:5},
]);
public function dtFunc(hd:HitData):String {
if(""+hd.item.expense == "NaN")
return "";
else
return hd.item.expense ;
}
]]></mx:Script>
<mx:SolidColor id="sc1" color="blue" alpha=".8"/>
<mx:Stroke id="s1" color="blue" weight="1"/>
<mx:Panel title="Column Chart With Multiple Axes">
<mx:CartesianChart id="myChart" showDataTips="true" dataTipFunction="dtFunc">
<mx:horizontalAxis>
<mx:CategoryAxis id="h1" categoryField="date"/>
</mx:horizontalAxis>
<mx:horizontalAxisRenderers>
<mx:AxisRenderer placement="bottom" axis="{h1}"/>
</mx:horizontalAxisRenderers>
<mx:verticalAxisRenderers>
<mx:AxisRenderer placement="left" axis="{v1}"/>
<mx:AxisRenderer placement="left" axis="{v3}" visible="false"/>
</mx:verticalAxisRenderers>
<mx:series>
<mx:ColumnSeries id="cs1"
horizontalAxis="{h1}"
dataProvider="{DS}"
yField="expense"
displayName="EXPENSE-BARCHART"
filterData="false"
>
<mx:verticalAxis>
<mx:LinearAxis id="v1" />
</mx:verticalAxis>
</mx:ColumnSeries>
<mx:LineSeries id="cs3" horizontalAxis="{h1}" dataProvider="{DS}" yField="price"
displayName="Price" form="step"
>
<mx:verticalAxis>
<mx:LinearAxis id="v3" />
</mx:verticalAxis>
</mx:LineSeries>
</mx:series>
</mx:CartesianChart>
<mx:Legend dataProvider="{myChart}"/>
</mx:Panel>
</mx:Application>