The data provider assigned to the enclosing chart. Element types can choose to inherit the data provider from the enclosing chart if necessary, or allow developers to assign data providers specifically to the element. Not all elements are necessarily driven by a data provider.

The DataTransform object that the element uses to map between data and screen coordinates. This property is assigned by the enclosing chart.

The DisplayObject that displays labels rendered by this element. In most cases, labels displayed in the data area of a chart are rendered on top of all elements rather than interleaved with the data. If an implementing Element has labels to display, it can place them in a Sprite object and return it as the value of the labelContainer property. Enclosing charts will labelContainers from all enclosed elements and place them in the data area above all other elements.

Called by the enclosing chart to indicate that the current state of the chart has changed. Implementing elements should respond to this method in order to synchronize changes to the data displayed by the element.

Called by the chart to allow associated elements to claim style selectors from its chartSeriesStyles Array. Each chart has an associated set of selectors that are implicitly assigned to contained elements that require them. Implementing this function gives an element a chance to 'claim' elements out of that set, as necessary. An element that requires N style selectors claims the values from styles[firstAvailable] to styles[firstAvailable + N - 1]. Elements return the new value for firstAvailable after claiming any styles (for example, firstAvailable + N).

Called by the enclosing chart to collect any transitions a particular element might play when the chart changes state. The chart collects transitions from all elements and ensures that they play in parallel. It waits until all transitions have completed before advancing to another state. Implementors should append any necessary transitions to the transitions Array parameter.

Called by the governing DataTransform to obtain a description of the data represented by this IChartElement. Implementors fill out and return an Array of mx.charts.chartClasses.DataDescription objects to guarantee that their data is correctly accounted for by any axes that are autogenerating values from the displayed data (such as minimum, maximum, interval, and unitSize). Most element types return an Array containing a single DataDescription. Aggregate elements, such as BarSet and ColumnSet, might return mutiple DataDescription instances that describe the data displayed by their subelements. When called, the implementor describes the data along the axis indicated by the dimension argument. This function might be called for each axis supported by the containing chart.

Returns a HitData object describing the nearest data point to the coordinates passed to the method. The x and y arguments should be values in the Element's coordinate system. This method aheres to the limits specifies by the sensitivity2 parameter when looking for nearby data points.

See also

Indicates to the element that the data mapping of the associated axes has changed. Implementors should dispose of cached data and re-render appropriately. This function is called automatically by the associated DataTransform when necessary.