actionscript 3 - Automatically update annotations in mx:ColumnChart -


so, have chart (simplified):

<fx:declarations>     <mx:solidcolor id="solidcolor" color="0x90ee90"/>     <mx:solidcolorstroke id="solidcolorstroke" color="0x90ee90"/> </fx:declarations>  <mx:columnchart id="columnchart" width="100%" height="100%">     <mx:annotationelements>         <mx:cartesiandatacanvas id="cartesiandatacanvas" includeinranges="true"/>     </mx:annotationelements>      <mx:horizontalaxis>         <mx:datetimeaxis id="datetimeaxis"/>     </mx:horizontalaxis>      <mx:horizontalaxisrenderers>         <mx:axisrenderer axis="{datetimeaxis}"/>     </mx:horizontalaxisrenderers>      <mx:verticalaxis>         <mx:linearaxis id="linearaxis" baseatzero="false"/>     </mx:verticalaxis>      <mx:verticalaxisrenderers>         <mx:axisrenderer axis="{linearaxis}"/>     </mx:verticalaxisrenderers>      <mx:series>         <mx:columnseries xfield="time" yfield="value" fill="{solidcolor}" stroke="{solidcolorstroke}"/>     </mx:series> </mx:columnchart>

from time time in chart updated columnchart.dataprovider. need draw on chart 2 horizontal lines (for min , max values) , yet something. know of can drawn in annotationelements oncartesiandatacanvas.

the question is: @ point (or event) should redraw annotations match actual data?

i tried after updating columnchart.dataprovider. it's - in datetimeaxis andlinearaxis did not have time calculate new min , max values. foolish calculate them manually.

i believe can try change event on columnchart as:

<mx:columnchart id="columnchart" width="100%" height="100%" change="handlechange(event)"> </mx:columnchart>

then in method handlechangeyou can work.


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