The CartesianTransform object represents a set of axes
that maps data values to x/y Cartesian screen coordinates
and vice versa.
When using charts in your applications, you
typically will not need to interact with the CartesianTransform object.
Transforms are created automatically by the built-in chart types
and used by the series contained within
so that they can transform data into rendering coordinates.
Dispatched when the transformation from data space to screen space has changed, typically either because the axes that make up the transformation have changed in some way, or the data transform itself has size.
The height of the data area that the CartesianTransform represents,
in pixels.
The containing chart sets this property explicitly during layout.
The CartesianTransform uses this property
to map data values to screen coordinates.
Implementation public function set pixelHeight(value:Number):void
pixelWidth
property
pixelWidth:Number [write-only]
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
The width of the data area that the CartesianTransform represents,
in pixels.
The containing chart sets this property explicitly during layout.
The CartesianTransform uses this property
to map data values to screen coordinates.
Implementation public function set pixelWidth(value:Number):void
Constructor Detail
CartesianTransform
()
Constructor
public function CartesianTransform()
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Constructor.
Method Detail
invertTransform
()
method
override public function invertTransform(... values):Array
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Transforms x and y coordinates relative to the DataTransform
coordinate system into a 2-dimensional value in data space.
Parameters
... values — The x and y positions (in that order).
Returns
Array — An Array containing the transformed values.
transformCache
()
method
override public function transformCache(cache:Array, xField:String, xConvertedField:String, yField:String, yConvertedField:String):void
Language Version :
ActionScript 3.0
Product Version :
Flex 3
Runtime Versions :
Flash Player 9, AIR 1.1
Maps a set of numeric values representing data to screen coordinates.
This method assumes the values are all numbers,
so any non-numeric values must have been previously converted
with the mapCache() method.
Parameters
cache:Array — An array of objects containing the data values
in their fields.
This is also where this function stores the converted numeric values.
xField:String — The field where the data values for the x axis are stored.
xConvertedField:String — The field where the mapped x screen coordinate
is stored.
yField:String — The field where the data values for the y axis are stored.
yConvertedField:String — The field where the mapped y screen coordinate
is stored.
DataTransform 
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