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Steps to reproduce:
1. Create LineChart with one LineSeries
2. Set dataProvider for LineChart with one datapoint
3. Set a dataTipFunction for the LineChart
 
 Actual Results:
 Datatip does not show on mouse over. A breakpoint within the dataTipFunction is never hit. When a second datapoint is added to the dataProvider, all datatips are displayed when mouse over.
 
 Expected Results:
 Show the datatip when only one datapoint in dataProvider of a LineChart.
 
 Workaround (if any):
One can use the "showAllDataTips" flag. This flag when set, shows the data tips.

Sample Code:

....
<Script>
        <![CDATA[
        
    private var dp:ArrayCollection = new ArrayCollection([{day:"Monday", value:7792}]);

    public function showTips(hd:HitData):String
   {
      return "Day:" + hd.item.day+ "\n" + "Value" + hd.item.value;
   }
           
        ]]>
</Script>


<VBox width="100%" height="100%" right="5" left="5" top="10" verticalGap="0">
    <LineChart id="myLC" dataProvider="{dp}" showDataTips="true" dataTipFunction="showTips">
        <horizontalAxis>
            <CategoryAxis categoryField="day" />
        </horizontalAxis>
        <series>
             <LineSeries xField="day" yField="value">
                <stroke>
                     <Stroke color="blue" alpha="1" weight="1" />
               </stroke>
               <fill>
                   <SolidColor color="blue"/>
                </fill>
               <itemRenderer>
                   <Component>
                       <CircleItemRenderer />
                   </Component>
               </itemRenderer>
         </LineSeries>
     </series>
   </LineChart>
</VBox>

.....

 
 

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Steps to reproduce: 1. Create LineChart with one LineSeries 2. Set dataProvider for LineChart with one datapoint 3. Set a dataTipFunction for the LineChart    Actual Results:  Datatip does not show on mouse over. A breakpoint within the dataTipFunction is never hit. When a second datapoint is added to the dataProvider, all datatips are displayed when mouse over.    Expected Results:  Show the datatip when only one datapoint in dataProvider of a LineChart.    Workaround (if any): One can use the "showAllDataTips" flag. This flag when set, shows the data tips. Sample Code: .... <Script>         <![CDATA[              private var dp:ArrayCollection = new ArrayCollection([{day:"Monday", value:7792}]);     public function showTips(hd:HitData):String    {       return "Day:" + hd.item.day+ "\n" + "Value" + hd.item.value;    }                     ]]> </Script> <VBox width="100%" height="100%" right="5" left="5" top="10" verticalGap="0">     <LineChart id="myLC" dataProvider="{dp}" showDataTips="true" dataTipFunction="showTips">         <horizontalAxis>             <CategoryAxis categoryField="day" />         </horizontalAxis>         <series>              <LineSeries xField="day" yField="value">                 <stroke>                      <Stroke color="blue" alpha="1" weight="1" />                </stroke>                <fill>                    <SolidColor color="blue"/>                 </fill>                <itemRenderer>                    <Component>                        <CircleItemRenderer />                    </Component>                </itemRenderer>          </LineSeries>      </series>    </LineChart> </VBox> .....