MACROMEDIA FLEX 2-MIGRATING APPLICATIONS TO FLEX 2 Manuale Utente Scaricare il pdf (Pagina 166)

166 Additional Migration Issues

Skins

Skins are now called renderers. For example, the CandlestickSkin class is now

CandlestickRenderer.

Renderers

Some functionality for the AxisRenderer was moved to other axis objects.

The

labelFunction property, which was a property of AxisRenderer, is now a property of the

axis type (such as CategoryAxis). The signature for the function is changed as well. Instead of

a single parameter,

the labelFunction() function now takes up to four. The new signature

is as follows:

labelFunction(categoryValue:Object, previousCategoryValue:Object,

axis:axis_type, categoryItem:Object);

For more information on using the labelFunction property, see the Flex 2 Developer’s Guide.

The

title property was also moved to the individual axis rather than the axis renderer. For

example, in Flex 1.x you defined both the horizontalAxis and the horizontalAxisRenderer, as

the following example shows:

<mx:horizontalAxis>

<mx:CategoryAxis dataProvider="{expenses}" categoryField="Month"/>

</mx:horizontalAxis>

<mx:horizontalAxisRenderer>

<mx:AxisRenderer title="Expenses" labelFunction="defineLabel"/>

</mx:horizontalAxisRenderer>

In Flex 2, you set the title and labelFunction properties on the horizontalAxis:

<mx:horizontalAxis>

<mx:CategoryAxis dataProvider="{expenses}" categoryField="Month"

title="Expenses" labelFunction="defineLabel"/>

</mx:horizontalAxis>

You no longer use renderers to change the appearance of ChartItems. In Flex 1.x, for example,

you could specify a CrossRenderer or TriangleRenderer to draw a ChartItem as a cross or a

triangle:

<mx:PlotSeries>

<mx:renderer>

<mx:CrossRenderer/>

</mx:renderer>

</mx:PlotSeries>

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MACROMEDIA FLEX 2-MIGRATING APPLICATIONS TO FLEX 2 Manuale Utente Pagina 166