Packagestarling.display
Classpublic class Canvas
InheritanceCanvas Inheritance DisplayObject Inheritance EventDispatcher Inheritance Object

A display object supporting basic vector drawing functionality. In its current state, the main use of this class is to provide a range of forms that can be used as masks.



Public Properties
 PropertyDefined By
 Inheritedalpha : Number
The opacity of the object.
DisplayObject
 Inheritedbase : DisplayObject
[read-only] The topmost object in the display tree the object is part of.
DisplayObject
 InheritedblendMode : String
The blend mode determines how the object is blended with the objects underneath.
DisplayObject
 Inheritedbounds : Rectangle
[read-only] The bounds of the object relative to the local coordinates of the parent.
DisplayObject
 Inheritedfilter : FragmentFilter
The filter that is attached to the display object.
DisplayObject
 InheritedhasVisibleArea : Boolean
[read-only] Indicates if an object occupies any visible area.
DisplayObject
 Inheritedheight : Number
The height of the object in pixels.
DisplayObject
 Inheritedis3D : Boolean
[read-only] Indicates if this object or any of its parents is a 'Sprite3D' object.
DisplayObject
 Inheritedmask : DisplayObject
The display object that acts as a mask for the current object.
DisplayObject
 Inheritedname : String
The name of the display object (default: null).
DisplayObject
 Inheritedparent : DisplayObjectContainer
[read-only] The display object container that contains this display object.
DisplayObject
 InheritedpivotX : Number
The x coordinate of the object's origin in its own coordinate space (default: 0).
DisplayObject
 InheritedpivotY : Number
The y coordinate of the object's origin in its own coordinate space (default: 0).
DisplayObject
 Inheritedroot : DisplayObject
[read-only] The root object the display object is connected to (i.e.
DisplayObject
 Inheritedrotation : Number
The rotation of the object in radians.
DisplayObject
 InheritedscaleX : Number
The horizontal scale factor.
DisplayObject
 InheritedscaleY : Number
The vertical scale factor.
DisplayObject
 InheritedskewX : Number
The horizontal skew angle in radians.
DisplayObject
 InheritedskewY : Number
The vertical skew angle in radians.
DisplayObject
 Inheritedstage : Stage
[read-only] The stage the display object is connected to, or null if it is not connected to the stage.
DisplayObject
 Inheritedtouchable : Boolean
Indicates if this object (and its children) will receive touch events.
DisplayObject
 InheritedtransformationMatrix : Matrix
The transformation matrix of the object relative to its parent.
DisplayObject
 InheritedtransformationMatrix3D : Matrix3D
[read-only] The 3D transformation matrix of the object relative to its parent.
DisplayObject
 InheriteduseHandCursor : Boolean
Indicates if the mouse cursor should transform into a hand while it's over the sprite.
DisplayObject
 Inheritedvisible : Boolean
The visibility of the object.
DisplayObject
 Inheritedwidth : Number
The width of the object in pixels.
DisplayObject
 Inheritedx : Number
The x coordinate of the object relative to the local coordinates of the parent.
DisplayObject
 Inheritedy : Number
The y coordinate of the object relative to the local coordinates of the parent.
DisplayObject
Public Methods
 MethodDefined By
  
Creates a new (empty) Canvas.
Canvas
 Inherited
addEventListener(type:String, listener:Function):void
[override] Registers an event listener at a certain object.
DisplayObject
 Inherited
alignPivot(hAlign:String = center, vAlign:String = center):void
Moves the pivot point to a certain position within the local coordinate system of the object.
DisplayObject
  
beginFill(color:uint = 0xffffff, alpha:Number = 1.0):void
Specifies a simple one-color fill that subsequent calls to drawing methods (such as drawCircle()) will use.
Canvas
  
clear():void
Removes all existing vertices.
Canvas
 Inherited
dispatchEvent(event:Event):void
[override]
DisplayObject
 Inherited
dispatchEventWith(type:String, bubbles:Boolean = false, data:Object = null):void
Dispatches an event with the given parameters to all objects that have registered listeners for the given type.
EventDispatcher
  
dispose():void
[override] Disposes all resources of the display object.
Canvas
  
drawCircle(x:Number, y:Number, radius:Number):void
Draws a circle.
Canvas
  
drawEllipse(x:Number, y:Number, width:Number, height:Number):void
Draws an ellipse.
Canvas
  
drawPolygon(polygon:Polygon):void
Draws an arbitrary polygon.
Canvas
  
drawRectangle(x:Number, y:Number, width:Number, height:Number):void
Draws a rectangle.
Canvas
  
endFill():void
Resets the color to 'white' and alpha to '1'.
Canvas
  
getBounds(targetSpace:DisplayObject, resultRect:Rectangle = null):Rectangle
[override] Returns a rectangle that completely encloses the object as it appears in another coordinate system.
Canvas
 Inherited
getTransformationMatrix(targetSpace:DisplayObject, resultMatrix:Matrix = null):Matrix
Creates a matrix that represents the transformation from the local coordinate system to another.
DisplayObject
 Inherited
getTransformationMatrix3D(targetSpace:DisplayObject, resultMatrix:Matrix3D = null):Matrix3D
Creates a matrix that represents the transformation from the local coordinate system to another.
DisplayObject
 Inherited
globalToLocal(globalPoint:Point, resultPoint:Point = null):Point
Transforms a point from global (stage) coordinates to the local coordinate system.
DisplayObject
 Inherited
globalToLocal3D(globalPoint:Point, resultPoint:Vector3D = null):Vector3D
Transforms a point from global (stage) coordinates to the 3D local coordinate system.
DisplayObject
 Inherited
hasEventListener(type:String):Boolean
Returns if there are listeners registered for a certain event type.
EventDispatcher
  
hitTest(localPoint:Point, forTouch:Boolean = false):DisplayObject
[override] Returns the object that is found topmost beneath a point in local coordinates, or nil if the test fails.
Canvas
 Inherited
hitTestMask(localPoint:Point):Boolean
Checks if a certain point is inside the display object's mask.
DisplayObject
 Inherited
local3DToGlobal(localPoint:Vector3D, resultPoint:Point = null):Point
Transforms a 3D point from the local coordinate system to global (stage) coordinates.
DisplayObject
 Inherited
localToGlobal(localPoint:Point, resultPoint:Point = null):Point
Transforms a point from the local coordinate system to global (stage) coordinates.
DisplayObject
 Inherited
removeEventListener(type:String, listener:Function):void
[override] Removes an event listener from the object.
DisplayObject
 Inherited
removeEventListeners(type:String = null):void
[override] Removes all event listeners with a certain type, or all of them if type is null.
DisplayObject
 Inherited
removeFromParent(dispose:Boolean = false):void
Removes the object from its parent, if it has one, and optionally disposes it.
DisplayObject
  
render(support:RenderSupport, parentAlpha:Number):void
[override] Renders the display object with the help of a support object.
Canvas
Events
 Event Summary Defined By
 InheritedDispatched when an object is added to a parent.DisplayObject
 InheritedDispatched when an object is connected to the stage (directly or indirectly).DisplayObject
 InheritedDispatched once every frame on every object that is connected to the stage.DisplayObject
 InheritedDispatched when a key on the keyboard is pressed.DisplayObject
 InheritedDispatched when a key on the keyboard is released.DisplayObject
 InheritedDispatched when an object is removed from its parent.DisplayObject
 InheritedDispatched when an object is removed from the stage and won't be rendered any longer.DisplayObject
 InheritedDispatched when an object is touched.DisplayObject
Constructor Detail
Canvas()Constructor
public function Canvas()

Creates a new (empty) Canvas. Call one or more of the 'draw' methods to add content.

Method Detail
beginFill()method
public function beginFill(color:uint = 0xffffff, alpha:Number = 1.0):void

Specifies a simple one-color fill that subsequent calls to drawing methods (such as drawCircle()) will use.

Parameters

color:uint (default = 0xffffff)
 
alpha:Number (default = 1.0)

clear()method 
public function clear():void

Removes all existing vertices.

dispose()method 
override public function dispose():void

Disposes all resources of the display object. GPU buffers are released, event listeners are removed, filters and masks are disposed.

drawCircle()method 
public function drawCircle(x:Number, y:Number, radius:Number):void

Draws a circle.

Parameters

x:Number
 
y:Number
 
radius:Number

drawEllipse()method 
public function drawEllipse(x:Number, y:Number, width:Number, height:Number):void

Draws an ellipse.

Parameters

x:Number
 
y:Number
 
width:Number
 
height:Number

drawPolygon()method 
public function drawPolygon(polygon:Polygon):void

Draws an arbitrary polygon.

Parameters

polygon:Polygon

drawRectangle()method 
public function drawRectangle(x:Number, y:Number, width:Number, height:Number):void

Draws a rectangle.

Parameters

x:Number
 
y:Number
 
width:Number
 
height:Number

endFill()method 
public function endFill():void

Resets the color to 'white' and alpha to '1'.

getBounds()method 
override public function getBounds(targetSpace:DisplayObject, resultRect:Rectangle = null):Rectangle

Returns a rectangle that completely encloses the object as it appears in another coordinate system. If you pass a 'resultRectangle', the result will be stored in this rectangle instead of creating a new object.

Parameters

targetSpace:DisplayObject
 
resultRect:Rectangle (default = null)

Returns
Rectangle
hitTest()method 
override public function hitTest(localPoint:Point, forTouch:Boolean = false):DisplayObject

Returns the object that is found topmost beneath a point in local coordinates, or nil if the test fails. If "forTouch" is true, untouchable and invisible objects will cause the test to fail.

Parameters

localPoint:Point
 
forTouch:Boolean (default = false)

Returns
DisplayObject
render()method 
override public function render(support:RenderSupport, parentAlpha:Number):void

Renders the display object with the help of a support object. Never call this method directly, except from within another render method.

Parameters

support:RenderSupport — Provides utility functions for rendering.
 
parentAlpha:Number — The accumulated alpha value from the object's parent up to the stage.