Package | flash.geom |
Class | public class ColorTransform |
Inheritance | ColorTransform Object |
Language Version: | ActionScript 3.0 |
Runtime Versions: | Flash Player 9, AIR 1.0 |
When a ColorTransform object is applied to a display object, a new value for each color channel is calculated like this:
- New red value = (old red value *
redMultiplier
) +redOffset
- New green value = (old green value *
greenMultiplier
) +greenOffset
- New blue value = (old blue value *
blueMultiplier
) +blueOffset
- New alpha value = (old alpha value *
alphaMultiplier
) +alphaOffset
If any of the color channel values is greater than 255 after the calculation, it is set to 255. If it is less than 0, it is set to 0.
You can use ColorTransform objects in the following ways:
- In the
colorTransform
parameter of thecolorTransform()
method of the BitmapData class - As the
colorTransform
property of a Transform object (which can be used as thetransform
property of a display object)
You must use the new ColorTransform()
constructor to create a
ColorTransform object before you can call the methods of the
ColorTransform object.
Color transformations do not apply to the background color of a movie clip (such as a loaded SWF object). They apply only to graphics and symbols that are attached to the movie clip.
See also
flash.display.DisplayObject.transform
flash.display.BitmapData.colorTransform()
Using MXML graphics
Property | Defined By | ||
---|---|---|---|
alphaMultiplier : Number
A decimal value that is multiplied with the alpha transparency channel value. | ColorTransform | ||
alphaOffset : Number
A number from -255 to 255 that is added to the alpha transparency channel value after it has
been multiplied by the alphaMultiplier value. | ColorTransform | ||
blueMultiplier : Number
A decimal value that is multiplied with the blue channel value. | ColorTransform | ||
blueOffset : Number
A number from -255 to 255 that is added to the blue channel value after it has
been multiplied by the blueMultiplier value. | ColorTransform | ||
color : uint
The RGB color value for a ColorTransform object. | ColorTransform | ||
constructor : Object
A reference to the class object or constructor function for a given object instance. | Object | ||
greenMultiplier : Number
A decimal value that is multiplied with the green channel value. | ColorTransform | ||
greenOffset : Number
A number from -255 to 255 that is added to the green channel value after it has
been multiplied by the greenMultiplier value. | ColorTransform | ||
prototype : Object [static]
A reference to the prototype object of a class or function object. | Object | ||
redMultiplier : Number
A decimal value that is multiplied with the red channel value. | ColorTransform | ||
redOffset : Number
A number from -255 to 255 that is added to the red channel value after it has been
multiplied by the redMultiplier value. | ColorTransform |
Method | Defined By | ||
---|---|---|---|
ColorTransform(redMultiplier:Number = 1.0, greenMultiplier:Number = 1.0, blueMultiplier:Number = 1.0, alphaMultiplier:Number = 1.0, redOffset:Number = 0, greenOffset:Number = 0, blueOffset:Number = 0, alphaOffset:Number = 0)
Creates a ColorTransform object for a display object with the specified
color channel values and alpha values. | ColorTransform | ||
Concatenates the ColorTranform object specified by the second parameter
with the current ColorTransform object and sets the
current object as the result, which is an additive combination of the two color transformations. | ColorTransform | ||
Indicates whether an object has a specified property defined. | Object | ||
Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter. | Object | ||
Indicates whether the specified property exists and is enumerable. | Object | ||
Sets the availability of a dynamic property for loop operations. | Object | ||
Returns the string representation of this object, formatted according to locale-specific conventions. | Object | ||
Formats and returns a string that describes all of the properties of the
ColorTransform object. | ColorTransform | ||
Returns the primitive value of the specified object. | Object |
alphaMultiplier | property |
public var alphaMultiplier:Number
Language Version: | ActionScript 3.0 |
Runtime Versions: | Flash Player 9, AIR 1.0 |
A decimal value that is multiplied with the alpha transparency channel value.
If you set the alpha transparency value of a display object directly by using the
alpha
property of the DisplayObject instance, it affects the value of the
alphaMultiplier
property of that display object's transform.colorTransform
property.
See also
alphaOffset | property |
public var alphaOffset:Number
Language Version: | ActionScript 3.0 |
Runtime Versions: | Flash Player 9, AIR 1.0 |
A number from -255 to 255 that is added to the alpha transparency channel value after it has
been multiplied by the alphaMultiplier
value.
blueMultiplier | property |
public var blueMultiplier:Number
Language Version: | ActionScript 3.0 |
Runtime Versions: | Flash Player 9, AIR 1.0 |
A decimal value that is multiplied with the blue channel value.
blueOffset | property |
public var blueOffset:Number
Language Version: | ActionScript 3.0 |
Runtime Versions: | Flash Player 9, AIR 1.0 |
A number from -255 to 255 that is added to the blue channel value after it has
been multiplied by the blueMultiplier
value.
color | property |
color:uint
Language Version: | ActionScript 3.0 |
Runtime Versions: | Flash Player 9, AIR 1.0 |
The RGB color value for a ColorTransform object.
When you set this property, it changes the three color offset values (redOffset
,
greenOffset
, and blueOffset
)
accordingly, and it sets the three color multiplier values (redMultiplier
,
greenMultiplier
, and blueMultiplier
) to 0.
The alpha transparency multiplier and offset values do not change.
When you pass a value for this property, use the format 0xRRGGBB. RR, GG, and BB each consist of two hexadecimal digits that specify the offset of each color component. The 0x tells the ActionScript compiler that the number is a hexadecimal value.
Implementation
public function get color():uint
public function set color(value:uint):void
greenMultiplier | property |
public var greenMultiplier:Number
Language Version: | ActionScript 3.0 |
Runtime Versions: | Flash Player 9, AIR 1.0 |
A decimal value that is multiplied with the green channel value.
greenOffset | property |
public var greenOffset:Number
Language Version: | ActionScript 3.0 |
Runtime Versions: | Flash Player 9, AIR 1.0 |
A number from -255 to 255 that is added to the green channel value after it has
been multiplied by the greenMultiplier
value.
redMultiplier | property |
public var redMultiplier:Number
Language Version: | ActionScript 3.0 |
Runtime Versions: | Flash Player 9, AIR 1.0 |
A decimal value that is multiplied with the red channel value.
redOffset | property |
public var redOffset:Number
Language Version: | ActionScript 3.0 |
Runtime Versions: | Flash Player 9, AIR 1.0 |
A number from -255 to 255 that is added to the red channel value after it has been
multiplied by the redMultiplier
value.
ColorTransform | () | Constructor |
public function ColorTransform(redMultiplier:Number = 1.0, greenMultiplier:Number = 1.0, blueMultiplier:Number = 1.0, alphaMultiplier:Number = 1.0, redOffset:Number = 0, greenOffset:Number = 0, blueOffset:Number = 0, alphaOffset:Number = 0)
Language Version: | ActionScript 3.0 |
Runtime Versions: | Flash Player 9, AIR 1.0 |
Creates a ColorTransform object for a display object with the specified color channel values and alpha values.
ParametersredMultiplier:Number (default = 1.0 ) — The value for the red multiplier, in the range from 0 to 1.
| |
greenMultiplier:Number (default = 1.0 ) — The value for the green multiplier, in the range from 0 to 1.
| |
blueMultiplier:Number (default = 1.0 ) — The value for the blue multiplier, in the range from 0 to 1.
| |
alphaMultiplier:Number (default = 1.0 ) — The value for the alpha transparency multiplier, in the range from 0 to 1.
| |
redOffset:Number (default = 0 ) — The offset value for the red color channel, in the range from -255 to 255.
| |
greenOffset:Number (default = 0 ) — The offset value for the green color channel, in the range from -255 to 255.
| |
blueOffset:Number (default = 0 ) — The offset for the blue color channel value, in the range from -255 to 255.
| |
alphaOffset:Number (default = 0 ) — The offset for alpha transparency channel value, in the range from -255 to 255.
|
concat | () | method |
public function concat(second:flash.geom:ColorTransform):void
Language Version: | ActionScript 3.0 |
Runtime Versions: | Flash Player 9, AIR 1.0 |
Concatenates the ColorTranform object specified by the second
parameter
with the current ColorTransform object and sets the
current object as the result, which is an additive combination of the two color transformations.
When you apply the concatenated ColorTransform object, the effect is the same as applying the
second
color transformation after the original color transformation.
Parameters
second:flash.geom:ColorTransform — The ColorTransform object to be combined with the current ColorTransform object.
|
toString | () | method |
public function toString():String
Language Version: | ActionScript 3.0 |
Runtime Versions: | Flash Player 9, AIR 1.0 |
Formats and returns a string that describes all of the properties of the ColorTransform object.
ReturnsString — A string that lists all of the properties of the ColorTransform object.
|
- The constructor creates a new sprite object
target
. - The
CustomButton()
constructor calls thedraw()
method, which draws a gradient square in the sprite. - The
CustomButton()
constructor adds a click event listener for the sprite, which is handled by theclickHandler()
method. - In the
clickHandler()
method, two properties are set to theredOffset
andblueOffset
properties of the current color transformation. Each is adjusted by 25. Then thetransform.colorTransform
property of the square sprite is modified to use the new offset values. Each time the user clicks the square, the call to theclickHandler()
method modifies the color of the square, by augmenting its red color value and diminishing its blue color value.
package { import flash.display.Sprite; import flash.display.GradientType; import flash.geom.ColorTransform; import flash.events.MouseEvent; public class ColorTransformExample extends Sprite { public function ColorTransformExample() { var target:Sprite = new Sprite(); draw(target); addChild(target); target.useHandCursor = true; target.buttonMode = true; target.addEventListener(MouseEvent.CLICK, clickHandler) } public function draw(sprite:Sprite):void { var red:uint = 0xFF0000; var green:uint = 0x00FF00; var blue:uint = 0x0000FF; var size:Number = 100; sprite.graphics.beginGradientFill(GradientType.LINEAR, [red, blue, green], [1, 0.5, 1], [0, 200, 255]); sprite.graphics.drawRect(0, 0, 100, 100); } public function clickHandler(event:MouseEvent):void { var rOffset:Number = transform.colorTransform.redOffset + 25; var bOffset:Number = transform.colorTransform.redOffset - 25; this.transform.colorTransform = new ColorTransform(1, 1, 1, 1, rOffset, 0, bOffset, 0); } } }
Fri Mar 19 2010, 02:45 AM -07:00