Справочник Пользователя для Macromedia flex 2-migrating applications to flex 2

Charting

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In Flex 2, you set the value of the series’ 

itemRenderer

 property to a skin class that draws the 

ChartItem’s icon:

<mx:PlotSeries itemRenderer="mx.charts.skins.halo.CrossSkin"/>

In addition, you can no longer use the AssetRenderer to use graphics in your charts. Instead, 
you must use a class that implements the IDataObject interface.

Binding

In many cases, you declare a data provider object and bind the chart to that data provider. In 
Flex 2, you must add the 

[Bindable]

 metadata tag to the variable declaration, otherwise Flex 

does not bind to the data. For example:

<mx:Script>

[Bindable]

// Add this in Flex 2

public var expenses:Object = [{ ... }, { ... }, { ... }];

</mx:Script>
<mx:BubbleChart maxRadius="50" dataProvider="{expenses}" 

mouseDown events

In Flex 1.5, 

mouseDown

 events included 

hitData

 structures, even if no data was under the 

mouse’s pointer. In this case, the 

hitData

 property existed, but it was 

null

. This behavior was 

a way to check for the existence of a click on a chart control.

In Flex 2, 

mouseDown

 events do not include the 

hitData

 structure unless the mouse is 

positioned over a data point. Instead, you must use the 

mouseDownData

 event.

alpha

All aspects of charting that used an alpha property to represent transparency, such as Strokes 
and Fills, now use 0 to 1 for a range of values rather than 1 to 100. For example:

Flex 1.x:

<mx:SolidColor color="0x7EAEFF" alpha="30"/>

Flex 2:

<mx:SolidColor color="0x7EAEFF" alpha=".3"/>