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mx.graphics 

RadialGradient  - AS3 Flex

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Language Elements

Global Constants
Global Functions
Operators
Statements, Keywords & Directives
Special Types

Appendixes

What's New
Compiler Errors
Compiler Warnings
Run-Time Errors
Migrating to ActionScript 3
Supported Character Sets
MXML Only Tags
Motion XML Elements
Timed Text Tags
List of deprecated elements
Accessibility Implementation Constants
How to Use ActionScript Examples
Legal notices
Packagemx.graphics
Classpublic class RadialGradient
InheritanceRadialGradient Inheritance GradientBase Inheritance EventDispatcher Inheritance Object
Implements IFill

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

The RadialGradient class lets you specify a gradual color transition in the fill color. A radial gradient defines a fill pattern that radiates out from the center of a graphical element. You add a series of GradientEntry objects to the RadialGradient object's entries Array to define the colors that make up the gradient fill.

In MXML, you define a RadialGradient by adding a series of GradientEntry objects, as the following example shows:

  <mx:fill>
      <mx:RadialGradient>
          <mx:entries>
              <mx:GradientEntry color="0xC5C551" ratio="0.00" alpha="0.5"/>
              <mx:GradientEntry color="0xFEFE24" ratio="0.33" alpha="0.5"/>
              <mx:GradientEntry color="0xECEC21" ratio="0.66" alpha="0.5"/>
          </mx:entries>
      </mx:RadialGradient>
  </mx:fill>
  

You can also define a RadialGradient as a fill for any graphic element in ActionScript, as the following example shows:

  
  <?xml version="1.0"?>
  <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="init()">
      <mx:Script>
      import flash.display.Graphics;
      import flash.geom.Rectangle;
      import mx.graphics.GradientEntry;
      import mx.graphics.RadialGradient;
  
      private function init():void
      {
          var w:Number = 200;
          var h:Number = 200;
  
          var s:Sprite = new Sprite();
          // Add the new Sprite to the display list.
          rawChildren.addChild(s);    
  
          var g:Graphics = s.graphics;
          g.lineStyle(1, 0x33CCFF, 1.0);
  
          var fill:RadialGradient = new RadialGradient();
          
          var g1:GradientEntry = new GradientEntry(0xFFCC66, 0.00, 0.5);
          var g2:GradientEntry = new GradientEntry(0x000000, 0.33, 0.5);
          var g3:GradientEntry = new GradientEntry(0x99FF33, 0.66, 0.5);
          
          fill.entries = [ g1, g2, g3 ];
  
          // Set focal point to upper left corner.
          fill.angle = 45;
          fill.focalPointRatio = -0.8;
  
          // Draw a box and fill it with the RadialGradient.
          g.moveTo(0, 0);
          fill.begin(g,new Rectangle(0, 0, w, h));
          g.lineTo(w, 0);
          g.lineTo(w, h);
          g.lineTo(0, h);
          g.lineTo(0, 0);      
          fill.end(g);
      }
      </mx:Script>
  </mx:Application>
  

MXML SyntaxexpandedHide MXML Syntax

The <mx:RadialGradient> tag inherits all the tag attributes of its superclass, and adds the following tag attributes:

  <mx:RadialGradient
    Properties
    angle="0"
    focalPointRatio="0"
  />
  

Default MXML Propertyentries

More examples

Learn more

Related API Elements



Public Properties
 PropertyDefined By
 Inheritedangle : Number
Deprecated: Please Use rotation
By default, the LinearGradientStroke defines a transition from left to right across the control.
GradientBase
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
 Inheritedentries : Array
An Array of GradientEntry objects defining the fill patterns for the gradient fill.
GradientBase
  focalPointRatio : Number
Sets the location of the start of the radial fill.
RadialGradient
 InheritedinterpolationMethod : String
A value from the InterpolationMethod class that specifies which interpolation method to use.
GradientBase
 Inheritedmatrix : Matrix
An array of values used for matrix transformation.
GradientBase
 Inheritedrotation : Number
By default, the LinearGradientStroke defines a transition from left to right across the control.
GradientBase
  scaleX : Number
The horizontal scale of the gradient transform, which defines the width of the (unrotated) gradient
RadialGradient
  scaleY : Number
The vertical scale of the gradient transform, which defines the height of the (unrotated) gradient
RadialGradient
 InheritedspreadMethod : String
A value from the SpreadMethod class that specifies which spread method to use.
GradientBase
 Inheritedx : Number
The distance by which to translate each point along the x axis.
GradientBase
 Inheritedy : Number
The distance by which to translate each point along the y axis.
GradientBase
Protected Properties
 PropertyDefined By
 InheritedcompoundTransform : mx.geom:CompoundTransform
Holds the matrix and the convenience transform properties (x, y, and rotation).
GradientBase
Public Methods
 MethodDefined By
  
Constructor.
RadialGradient
 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.
EventDispatcher
  
begin(target:Graphics, targetBounds:Rectangle, targetOrigin:Point):void
Starts the fill.
RadialGradient
 Inherited
Dispatches an event into the event flow.
EventDispatcher
  
end(target:Graphics):void
Ends the fill.
RadialGradient
 Inherited
Checks whether the EventDispatcher object has any listeners registered for a specific type of event.
EventDispatcher
 Inherited
Indicates whether an object has a specified property defined.
Object
 Inherited
Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.
Object
 Inherited
Indicates whether the specified property exists and is enumerable.
Object
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Removes a listener from the EventDispatcher object.
EventDispatcher
 Inherited
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
Returns the string representation of this object, formatted according to locale-specific conventions.
Object
 Inherited
Returns the string representation of the specified object.
Object
 Inherited
Returns the primitive value of the specified object.
Object
 Inherited
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.
EventDispatcher
Events
 Event Summary Defined By
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application gains operating system focus and becomes active.EventDispatcher
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application operating loses system focus and is becoming inactive.EventDispatcher
Property Detail

focalPointRatio

property
focalPointRatio:Number

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

Sets the location of the start of the radial fill.

Valid values are from -1.0 to 1.0. A value of -1.0 sets the focal point (or, start of the gradient fill) on the left of the bounding Rectangle. A value of 1.0 sets the focal point on the right of the bounding Rectangle.

If you use this property in conjunction with the angle property, this value specifies the degree of distance from the center that the focal point occurs. For example, with an angle of 45 and focalPointRatio of 0.25, the focal point is slightly lower and to the right of center. If you set focalPointRatio to 0, the focal point is in the middle of the bounding Rectangle.

If you set focalPointRatio to 1, the focal point is all the way to the bottom right corner of the bounding Rectangle.

The default value is 0.0.

This property can be used as the source for data binding. When this property is modified, it dispatches the propertyChange event.



Implementation
    public function get focalPointRatio():Number
    public function set focalPointRatio(value:Number):void

scaleX

property 
scaleX:Number

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

The horizontal scale of the gradient transform, which defines the width of the (unrotated) gradient

This property can be used as the source for data binding. When this property is modified, it dispatches the propertyChange event.



Implementation
    public function get scaleX():Number
    public function set scaleX(value:Number):void

scaleY

property 
scaleY:Number

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

The vertical scale of the gradient transform, which defines the height of the (unrotated) gradient

This property can be used as the source for data binding. When this property is modified, it dispatches the propertyChange event.



Implementation
    public function get scaleY():Number
    public function set scaleY(value:Number):void
Constructor Detail

RadialGradient

()Constructor
public function RadialGradient()

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

Constructor.

Method Detail

begin

()method
public function begin(target:Graphics, targetBounds:Rectangle, targetOrigin:Point):void

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

Starts the fill.

Parameters

target:Graphics — The target Graphics object that is being filled.
 
targetBounds:Rectangle — The Rectangle object that defines the size of the fill inside the target. If the dimensions of the Rectangle are larger than the dimensions of the target, the fill is clipped. If the dimensions of the Rectangle are smaller than the dimensions of the target, the fill expands to fill the entire target.
 
targetOrigin:Point — The Point that defines the origin (0,0) of the shape in the coordinate system of target.

end

()method 
public function end(target:Graphics):void

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

Ends the fill.

Parameters

target:Graphics — The Graphics object that is being filled.