What's My Title Today?

To customize the datatip in a linechart in flex you need to use the datatipfunction property that refers to a function. This function must return a string and take a parameter of type HitData. To get the current VALUE of the line point you're mousing over you need to use LineSeriesItem(hitData.chartItem).yValue - I found this difficult to find out at first. Here's an example: private function lcDataTipFunction(hitData:HitData):String { var s:String; s = LineSeries(hitData.element).displayName + "\n"; s += LineSeriesItem(hitData.chartItem).yValue + "\n"; s += hitData.item.Day + " at " + hitData.item.Time; return s; }

This took me some time to figure out so I thought I would post about it. Main objective is to toggle on and off lineseries based on user input. Usually this would mean editing the dataprovider, tricky thing here is that I need the color of each line to always be the same based on data, so instead I leave the dataprovider alone and actually add and remove LineSeries to/from the LineChart. This probably isn't the best way to do this, but hey, it works, and it may help someone else out. Here we go... First lets start with the MXML: Here I have a Panel with a LineChart and a Legend inside it, as well as 3 Toggle Buttons. You will notice that there are no series inside the LineChart. <mx:Panel title="LineChart Example" height="500" width="100%" layout="vertical"> <mx:HBox id="choices" horizontalGap="0"> <mx:Button id="Profit" label="Profit" toggle="true" click="upda...