Adobe® Flex® 4 Language Reference
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mx.charts.chartClasses 
IStackable 
Packagemx.charts.chartClasses
Interfacepublic interface IStackable

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The IStackable interface is implemented by any series that can be stacked. Stacking sets (ColumnSet, BarSet, AreaSet) require that any sub-series assigned to it when stacking implement this interface.



Public Properties
 PropertyDefined By
  stacker : StackedSeries
The StackedSeries associated with this series.
IStackable
  stackTotals : Dictionary
[write-only] The stack totals for the series.
IStackable
Public Methods
 MethodDefined By
  
stack(stackedXValueDictionary:Dictionary, previousElement:IStackable):Number
Stacks the series.
IStackable
Property Detail

stacker

property
stacker:StackedSeries

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The StackedSeries associated with this series. The stacker manages the series's stacking behavior.



Implementation
    public function get stacker():StackedSeries
    public function set stacker(value:StackedSeries):void

stackTotals

property 
stackTotals:Dictionary  [write-only]

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The stack totals for the series.



Implementation
    public function set stackTotals(value:Dictionary):void
Method Detail

stack

()method
public function stack(stackedXValueDictionary:Dictionary, previousElement:IStackable):Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Stacks the series. Normally, a series implements the updateData() method to load its data out of the data provider. But a stacking series performs special operations because its values are not necessarily stored in its data provider. Its values are whatever is stored in its data provider, summed with the values that are loaded by the object it stacks on top of.

A custom stacking series should implement the stack() method by loading its data out of its data provider, adding it to the base values stored in the dictionary to get the real values it should render with, and replacing the values in the dictionary with its new, summed values.

Parameters

stackedXValueDictionary:Dictionary — Contains the base values that the series should stack on top of. The keys in the dictionary are the y values, and the values are the x values.
 
previousElement:IStackable — The previous element in the stack. If, for example, the element is of the same type, you can use access to this property to avoid duplicate effort when rendering.

Returns
Number — The maximum value in the newly stacked series.