Adobe® Flex® 4 Language Reference
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mx.charts.chartClasses 
IChartElement2 
Packagemx.charts.chartClasses
Interfacepublic interface IChartElement2 extends IChartElement , IFlexDisplayObject , IBitmapDrawable , IEventDispatcher
Implementors ChartElement

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

IChartElement2 defines the base set of properties and methods required by a UIComponent to be representable in the data space of a chart. Any component assigned to the series, backgroundElements, or annotationElements Arrays of a chart must implement this interface.



Public Properties
 PropertyDefined By
 InheritedaccessibilityProperties : AccessibilityProperties
The current accessibility options for this display object.
IFlexDisplayObject
 Inheritedalpha : Number
Indicates the alpha transparency value of the object specified.
IFlexDisplayObject
 InheritedblendMode : String
A value from the BlendMode class that specifies which blend mode to use.
IFlexDisplayObject
 InheritedcacheAsBitmap : Boolean
If set to true, Flash Player or Adobe AIR caches an internal bitmap representation of the display object.
IFlexDisplayObject
 InheritedchartDataProvider : Object
[write-only] The data provider assigned to the enclosing chart.
IChartElement
 InheriteddataTransform : mx.charts.chartClasses:DataTransform
[write-only] The DataTransform object that the element uses to map between data and screen coordinates.
IChartElement
 Inheritedfilters : Array
An indexed array that contains each filter object currently associated with the display object.
IFlexDisplayObject
 Inheritedheight : Number
Indicates the height of the display object, in pixels.
IFlexDisplayObject
 InheritedlabelContainer : Sprite
[read-only] The DisplayObject that displays labels rendered by this element.
IChartElement
 InheritedloaderInfo : LoaderInfo
[read-only] Returns a LoaderInfo object containing information about loading the file to which this display object belongs.
IFlexDisplayObject
 Inheritedmask : DisplayObject
The calling display object is masked by the specified mask object.
IFlexDisplayObject
 InheritedmeasuredHeight : Number
[read-only] The measured height of this object.
IFlexDisplayObject
 InheritedmeasuredWidth : Number
[read-only] The measured width of this object.
IFlexDisplayObject
 InheritedmouseX : Number
[read-only] Indicates the x coordinate of the mouse position, in pixels.
IFlexDisplayObject
 InheritedmouseY : Number
[read-only] Indicates the y coordinate of the mouse position, in pixels.
IFlexDisplayObject
 Inheritedname : String
Indicates the instance name of the DisplayObject.
IFlexDisplayObject
 InheritedopaqueBackground : Object
Specifies whether the display object is opaque with a certain background color.
IFlexDisplayObject
 Inheritedparent : DisplayObjectContainer
[read-only] Indicates the DisplayObjectContainer object that contains this display object.
IFlexDisplayObject
 Inheritedroot : DisplayObject
[read-only] For a display object in a loaded SWF file, the root property is the top-most display object in the portion of the display list's tree structure represented by that SWF file.
IFlexDisplayObject
 Inheritedrotation : Number
Indicates the rotation of the DisplayObject instance, in degrees, from its original orientation.
IFlexDisplayObject
 Inheritedscale9Grid : Rectangle
The current scaling grid that is in effect.
IFlexDisplayObject
 InheritedscaleX : Number
Indicates the horizontal scale (percentage) of the object as applied from the registration point.
IFlexDisplayObject
 InheritedscaleY : Number
Indicates the vertical scale (percentage) of an object as applied from the registration point of the object.
IFlexDisplayObject
 InheritedscrollRect : Rectangle
The scroll rectangle bounds of the display object.
IFlexDisplayObject
 Inheritedstage : Stage
[read-only] The Stage of the display object.
IFlexDisplayObject
 Inheritedtransform : flash.geom:Transform
An object with properties pertaining to a display object's matrix, color transform, and pixel bounds.
IFlexDisplayObject
 Inheritedvisible : Boolean
Whether or not the display object is visible.
IFlexDisplayObject
 Inheritedwidth : Number
Indicates the width of the display object, in pixels.
IFlexDisplayObject
 Inheritedx : Number
Indicates the x coordinate of the DisplayObject instance relative to the local coordinates of the parent DisplayObjectContainer.
IFlexDisplayObject
 Inheritedy : Number
Indicates the y coordinate of the DisplayObject instance relative to the local coordinates of the parent DisplayObjectContainer.
IFlexDisplayObject
Public Methods
 MethodDefined By
 Inherited
addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registers an event listener object with an EventDispatcher object so that the listener receives notification of an event.
IEventDispatcher
 Inherited
Called by the enclosing chart to indicate that the current state of the chart has changed.
IChartElement
 Inherited
claimStyles(styles:Array, firstAvailable:uint):uint
Called by the chart to allow associated elements to claim style selectors from its chartSeriesStyles Array.
IChartElement
 Inherited
collectTransitions(chartState:Number, transitions:Array):void
Called by the enclosing chart to collect any transitions a particular element might play when the chart changes state.
IChartElement
  
dataToLocal(... dataValues):Point
Converts a tuple of data values to an x-y coordinate on screen.
IChartElement2
 Inherited
describeData(dimension:String, requiredFields:uint):Array
Called by the governing DataTransform to obtain a description of the data represented by this IChartElement.
IChartElement
 Inherited
Dispatches an event into the event flow.
IEventDispatcher
 Inherited
Returns a HitData object describing the nearest data point to the coordinates passed to the method.
IChartElement
  
Returns an array of HitData of the items of all the underlying objects that implement IChartElement2 whose dataTips are to be shown when showAllDataTips is set to true on chart.
IChartElement2
 Inherited
getBounds(targetCoordinateSpace:DisplayObject):Rectangle
Returns a rectangle that defines the area of the display object relative to the coordinate system of the targetCoordinateSpace object.
IFlexDisplayObject
 Inherited
getRect(targetCoordinateSpace:DisplayObject):Rectangle
Returns a rectangle that defines the boundary of the display object, based on the coordinate system defined by the targetCoordinateSpace parameter, excluding any strokes on shapes.
IFlexDisplayObject
 Inherited
Converts the point object from the Stage (global) coordinates to the display object's (local) coordinates.
IFlexDisplayObject
 Inherited
Checks whether the EventDispatcher object has any listeners registered for a specific type of event.
IEventDispatcher
 Inherited
Evaluates the bounding box of the display object to see if it overlaps or intersects with the bounding box of the obj display object.
IFlexDisplayObject
 Inherited
hitTestPoint(x:Number, y:Number, shapeFlag:Boolean = false):Boolean
Evaluates the display object to see if it overlaps or intersects with the point specified by the x and y parameters.
IFlexDisplayObject
  
Converts a coordinate on screen to a tuple of data values.
IChartElement2
 Inherited
Converts the point object from the display object's (local) coordinates to the Stage (global) coordinates.
IFlexDisplayObject
 Inherited
Indicates to the element that the data mapping of the associated axes has changed.
IChartElement
 Inherited
Moves this object to the specified x and y coordinates.
IFlexDisplayObject
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Removes a listener from the EventDispatcher object.
IEventDispatcher
 Inherited
setActualSize(newWidth:Number, newHeight:Number):void
Sets the actual size of this object.
IFlexDisplayObject
 Inherited
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.
IEventDispatcher
Method Detail

dataToLocal

()method
public function dataToLocal(... dataValues):Point

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

Converts a tuple of data values to an x-y coordinate on screen. Call this function to transform data on to the screen using the same transform that the individual elements go through. For example, to create a custom highlight for a data region of a chart, you might use this function to determine the on-screen coordinates of the range of interest.

For Cartesian chartelements, you typically pass two values. The first value maps to the horizontal axis, and the second value maps to the vertical axis.

For polar charts, the first value maps to the angular axis, and the second maps to the radial axis.

Parameters

... dataValues — The data values to convert to coordinates.

Returns
Point — Coordinates that are relative to the chart.

getAllDataPoints

()method 
public function getAllDataPoints():Array

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

Returns an array of HitData of the items of all the underlying objects that implement IChartElement2 whose dataTips are to be shown when showAllDataTips is set to true on chart.

Returns
Array — The HitData objects describing the data points

localToData

()method 
public function localToData(pt:Point):Array

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

Converts a coordinate on screen to a tuple of data values. Call this function to determine what data values a particular point on-screen represents.

Individual chart types determine how this transformation occurs. The point should be relative to the chart's coordinate space.

Parameters

pt:Point — The Point to convert.

Returns
Array — The tuple of data values.