BitmapImage

套件	spark.primitives
類別	public class BitmapImage
繼承	BitmapImage GraphicElement EventDispatcher Object

語言版本:

ActionScript 3.0

產品版本:

Flex 4.0

執行階段版本:

Flash Player 10, AIR 2.0

A BitmapImage element defines a rectangular region in its parent element's coordinate space, filled with bitmap data drawn from a source file or source URL.

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公用屬性

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	屬性		定義自
		alpha : Number The level of transparency of the graphic element.	GraphicElement
		alwaysCreateDisplayObject : Boolean Specifies that this GraphicElement is to be associated with and be rendered to its own DisplayObject.	GraphicElement
		baseline : Object The vertical distance in pixels from the anchor target to the control's baseline position.	GraphicElement
		baselinePosition : Number [唯讀] The y-coordinate of the baseline of the first line of text of the component.	GraphicElement
		bitmapData : BitmapData [唯讀] Returns a copy of the BitmapData object representing the currently loaded image content (unscaled).	BitmapImage
		blendMode : String A value from the BlendMode class that specifies which blend mode to use.	GraphicElement
		bottom : Object The vertical distance in pixels from the bottom edge of the component to the anchor target's bottom edge.	GraphicElement
		bytesLoaded : Number [唯讀] The number of bytes of the image already loaded.	BitmapImage
		bytesTotal : Number [唯讀] The total image data in bytes loaded or pending load.	BitmapImage
		clearOnLoad : Boolean Denotes whether or not to clear previous image content prior to loading new content.	BitmapImage
		constructor : Object 類別物件的參照或是特定物件實體的建構函數。	Object
		contentLoader : IContentLoader Optional custom image loader (e.g.	BitmapImage
		contentLoaderGrouping : String Optional content grouping identifier to pass to the an associated IContentLoader instance's load() method.	BitmapImage
		depth : Number Determines the order in which items inside of containers are rendered.	GraphicElement
		designLayer : DesignLayer Specifies the optional DesignLayer instance associated with this visual element.	GraphicElement
		displayObject : DisplayObject [唯讀] The shared DisplayObject where this IGraphicElement is drawn.	GraphicElement
		displayObjectSharingMode : String Indicates the association between this IGraphicElement and its display objects.	GraphicElement
		explicitHeight : Number Number that specifies the explicit height of the component, in pixels, in the component's coordinates.	GraphicElement
		explicitMaxHeight : Number The maximum recommended height of the component to be considered by the parent during layout.	GraphicElement
		explicitMaxWidth : Number The maximum recommended width of the component to be considered by the parent during layout.	GraphicElement
		explicitMinHeight : Number The minimum recommended height of the component to be considered by the parent during layout.	GraphicElement
		explicitMinWidth : Number The minimum recommended width of the component to be considered by the parent during layout.	GraphicElement
		explicitWidth : Number Number that specifies the explicit width of the component, in pixels, in the component's coordinates.	GraphicElement
		fillMode : String Determines how the bitmap fills in the dimensions.	BitmapImage
		filters : Array An indexed array that contains each filter object currently associated with the graphic element.	GraphicElement
		hasLayoutMatrix3D : Boolean [唯讀] Contains true if the element has 3D Matrix.	GraphicElement
		height : Number The height of the graphic element.	GraphicElement
		horizontalAlign : String The horizontal alignment of the content when it does not have a one-to-one aspect ratio and scaleMode is set to mx.graphics.BitmapScaleMode.LETTERBOX.	BitmapImage
		horizontalCenter : Object The horizontal distance in pixels from the center of the component to the center of the anchor target's content area.	GraphicElement
		id : String The identity of the component.	GraphicElement
		includeInLayout : Boolean Specifies whether this element is included in the layout of the parent.	GraphicElement
		is3D : Boolean [唯讀] Contains true when the element is in 3D.	GraphicElement
		layoutDirection : String Specifies the desired layout direction for an element: one of LayoutDirection.LTR (left to right), LayoutDirection.RTL (right to left), or null (inherit).	GraphicElement
		left : Object The horizontal distance in pixels from the left edge of the component to the anchor target's left edge.	GraphicElement
		luminosityClip : Boolean A property that controls whether the luminosity mask clips the masked content.	GraphicElement
		luminosityInvert : Boolean A property that controls the calculation of the RGB color value of a graphic element being masked by a luminosity mask.	GraphicElement
		mask : DisplayObject The calling display object is masked by the specified mask object.	GraphicElement
		maskType : String Defines how the mask is applied to the GraphicElement. The possible values are MaskType.CLIP, MaskType.ALPHA, and MaskType.LUMINOSITY. Clip Masking When masking in clip mode, a clipping masks is reduced to 1-bit.	GraphicElement
		maxHeight : Number The maximum recommended height of the component to be considered by the parent during layout.	GraphicElement
		maxWidth : Number The maximum recommended width of the component to be considered by the parent during layout.	GraphicElement
		measuredHeight : Number The default height of the component, in pixels.	GraphicElement
		measuredWidth : Number The default width of the component, in pixels.	GraphicElement
		measuredX : Number The default measured bounds top-left corner relative to the origin of the element.	GraphicElement
		measuredY : Number The default measured bounds top-left corner relative to the origin of the element.	GraphicElement
		minHeight : Number The minimum recommended height of the component to be considered by the parent during layout.	GraphicElement
		minWidth : Number The minimum recommended width of the component to be considered by the parent during layout.	GraphicElement
		owner : DisplayObjectContainer The owner of this IVisualElement object.	GraphicElement
		parent : DisplayObjectContainer [唯讀] The parent container or component for this component.	GraphicElement
		percentHeight : Number Specifies the height of a component as a percentage of its parent's size.	GraphicElement
		percentWidth : Number Specifies the width of a component as a percentage of its parent's size.	GraphicElement
		postLayoutTransformOffsets : mx.geom:TransformOffsets Defines a set of adjustments that can be applied to the object's transform in a way that is invisible to its parent's layout.	GraphicElement
		preliminaryHeight : Number Provides an estimate to use for height when the "measured" bounds of the image is requested by layout, but the image data has yet to complete loading.	BitmapImage
		preliminaryWidth : Number Provides an estimate to use for width when the "measured" bounds of the image is requested by layout, but the image data has yet to complete loading.	BitmapImage
		right : Object The horizontal distance in pixels from the right edge of the component to the anchor target's right edge.	GraphicElement
		rotation : Number Indicates the rotation of the element, in degrees, from the transform point.	GraphicElement
		rotationX : Number Indicates the x-axis rotation of the element instance, in degrees, from its original orientation relative to the 3D parent container.	GraphicElement
		rotationY : Number Indicates the y-axis rotation of the DisplayObject instance, in degrees, from its original orientation relative to the 3D parent container.	GraphicElement
		rotationZ : Number Indicates the rotation of the element, in degrees, from the transform point.	GraphicElement
		scaleMode : String Determines how the image is scaled when fillMode is set to mx.graphics.BitmapFillMode.SCALE.	BitmapImage
		scaleX : Number The horizontal scale (percentage) of the element as applied from the transform point.	GraphicElement
		scaleY : Number The vertical scale (percentage) of the element as applied from the transform point.	GraphicElement
		scaleZ : Number The z scale (percentage) of the element as applied from the transform point.	GraphicElement
		smooth : Boolean 指定是否要將平滑化演算法套用至點陣圖影像。	BitmapImage
		smoothingQuality : String Determines how the image is down-scaled.	BitmapImage
		source : Object The source used for the bitmap fill.	BitmapImage
		sourceHeight : Number [唯讀] Provides the unscaled height of the original image data.	BitmapImage
		sourceWidth : Number [唯讀] Provides the unscaled width of the original image data.	BitmapImage
		top : Object The vertical distance in pixels from the top edge of the component to the anchor target's top edge.	GraphicElement
		transform : flash.geom:Transform 這是一個物件，具有和顯示物件的矩陣、顏色轉換和像素邊界有關的屬性。	GraphicElement
		transformX : Number The x position transform point of the element.	GraphicElement
		transformY : Number The y position transform point of the element.	GraphicElement
		transformZ : Number The z position transform point of the element.	GraphicElement
		trustedSource : Boolean [唯讀] A read-only flag denoting whether the currently loaded content is considered loaded form a source whose security policy allows for cross domain image access.	BitmapImage
		verticalAlign : String The vertical alignment of the content when it does not have a one-to-one aspect ratio and scaleMode is set to mx.graphics.BitmapScaleMode.LETTERBOX.	BitmapImage
		verticalCenter : Object The vertical distance in pixels from the center of the component to the center of the anchor target's content area.	GraphicElement
		visible : Boolean Controls the visibility of this visual element.	GraphicElement
		width : Number The width of the graphic element.	GraphicElement
		x : Number The x position of the graphic element.	GraphicElement
		y : Number The y position of the graphic element.	GraphicElement
		z : Number The z position of the graphic element.	GraphicElement

保護屬性

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	屬性		定義自
		drawnDisplayObject : DisplayObject [唯讀] The actual DisplayObject that is drawn into by the GraphicElement.	GraphicElement
		drawX : Number [唯讀] The x position where the element should be drawn.	GraphicElement
		drawY : Number [唯讀] The y position where the element should be drawn.	GraphicElement
		hasComplexLayoutMatrix : Boolean [唯讀] Returns true if the GraphicElement has any non-translation (x,y) transform properties	GraphicElement
		layoutFeatures : AdvancedLayoutFeatures Contain all of the implementation details of how the GraphicElement implements transform and layering support.	GraphicElement
		needsDisplayObject : Boolean [唯讀] True if the element requires an exclusive DisplayObject.	GraphicElement

公用方法

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	方法		定義自
		BitmapImage() Constructor.	BitmapImage
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void 會在 EventDispatcher 物件註冊事件偵聽程式，以便讓偵聽程式收到事件的通知。	EventDispatcher
		canShareWithNext(element:IGraphicElement):Boolean Returns true if this IGraphicElement is compatible and can share display objects with the next IGraphicElement in the sequence.	GraphicElement
		canShareWithPrevious(element:IGraphicElement):Boolean Returns true if this IGraphicElement is compatible and can share display objects with the previous IGraphicElement in the sequence.	GraphicElement
		createDisplayObject():DisplayObject Creates a new DisplayObject where this IGraphicElement is drawn.	GraphicElement
		dispatchEvent(event:Event):Boolean 會將事件傳送到事件流程。	EventDispatcher
		getBoundsXAtSize(width:Number, height:Number, postLayoutTransform:Boolean = true):Number Returns the x coordinate of the element's bounds at the specified element size.	GraphicElement
		getBoundsYAtSize(width:Number, height:Number, postLayoutTransform:Boolean = true):Number Returns the y coordinate of the element's bounds at the specified element size.	GraphicElement
		getLayoutBoundsHeight(postLayoutTransform:Boolean = true):Number Returns the element's layout height.	GraphicElement
		getLayoutBoundsWidth(postLayoutTransform:Boolean = true):Number Returns the element's layout width.	GraphicElement
		getLayoutBoundsX(postLayoutTransform:Boolean = true):Number Returns the x coordinate that the element uses to draw on screen.	GraphicElement
		getLayoutBoundsY(postLayoutTransform:Boolean = true):Number Returns the y coordinate that the element uses to draw on screen.	GraphicElement
		getLayoutMatrix():Matrix Returns the transform matrix that is used to calculate the component's layout relative to its siblings.	GraphicElement
		getLayoutMatrix3D():Matrix3D Returns the layout transform Matrix3D for this element.	GraphicElement
		getMaxBoundsHeight(postLayoutTransform:Boolean = true):Number Returns the element's maximum height.	GraphicElement
		getMaxBoundsWidth(postLayoutTransform:Boolean = true):Number Returns the element's maximum width.	GraphicElement
		getMinBoundsHeight(postLayoutTransform:Boolean = true):Number Returns the element's minimum height.	GraphicElement
		getMinBoundsWidth(postLayoutTransform:Boolean = true):Number Returns the element's minimum width.	GraphicElement
		getPreferredBoundsHeight(postLayoutTransform:Boolean = true):Number Returns the element's preferred height.	GraphicElement
		getPreferredBoundsWidth(postLayoutTransform:Boolean = true):Number Returns the element's preferred width.	GraphicElement
		hasEventListener(type:String):Boolean 會檢查 EventDispatcher 物件是否有對特定的事件類型註冊偵聽程式。	EventDispatcher
		hasOwnProperty(name:String):Boolean 指出物件是否有已定義的指定屬性。	Object
		initialized(document:Object, id:String):void Called automatically by the MXML compiler when the GraphicElement is created using an MXML tag.	GraphicElement
		invalidateDisplayList():void Calling this method results in a call to the elements's validateDisplayList() method before the display list is rendered.	GraphicElement
		invalidateLayoutDirection():void An element must call this method when its layoutDirection changes or when its parent's layoutDirection changes.	GraphicElement
		invalidateProperties():void Calling this method results in a call to the elements's validateProperties() method before the display list is rendered.	GraphicElement
		invalidateSize():void Calling this method results in a call to the elements's validateSize() method before the display list is rendered.	GraphicElement
		isPrototypeOf(theClass:Object):Boolean 指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。	Object
		localToGlobal(point:Point):Point Converts the point object from the object's (local) coordinates to the Stage (global) coordinates.	GraphicElement
		parentChanged(value:IGraphicElementContainer):void Called by IGraphicElementContainer when an IGraphicElement is added to or removed from the host component.	GraphicElement
		propertyIsEnumerable(name:String):Boolean 指出指定的屬性是否存在，以及是否可列舉。	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void 會從 EventDispatcher 物件移除偵聽程式。	EventDispatcher
		setLayoutBoundsPosition(newBoundsX:Number, newBoundsY:Number, postLayoutTransform:Boolean = true):void Sets the coordinates that the element uses to draw on screen.	GraphicElement
		setLayoutBoundsSize(width:Number, height:Number, postLayoutTransform:Boolean = true):void Sets the layout size of the element.	GraphicElement
		setLayoutMatrix(value:Matrix, invalidateLayout:Boolean):void Sets the transform Matrix that is used to calculate the component's layout size and position relative to its siblings.	GraphicElement
		setLayoutMatrix3D(value:Matrix3D, invalidateLayout:Boolean):void Sets the transform Matrix3D that is used to calculate the component's layout size and position relative to its siblings.	GraphicElement
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void 為迴圈作業設定動態屬性的可用性。	Object
		setSharedDisplayObject(sharedDisplayObject:DisplayObject):Boolean Determines whether this element can draw itself to the sharedDisplayObject of the sequence.	GraphicElement
		toLocaleString():String 傳回代表此物件的字串，根據地區特定慣例進行格式化。	Object
		toString():String 會傳回指定之物件的字串形式。	Object
		transformAround(transformCenter:Vector3D, scale:Vector3D = null, rotation:Vector3D = null, translation:Vector3D = null, postLayoutScale:Vector3D = null, postLayoutRotation:Vector3D = null, postLayoutTranslation:Vector3D = null, invalidateLayout:Boolean = true):void A utility method to update the rotation, scale, and translation of the transform while keeping a particular point, specified in the component's own coordinate space, fixed in the parent's coordinate space.	GraphicElement
		transformPointToParent(localPosition:Vector3D, position:Vector3D, postLayoutPosition:Vector3D):void A utility method to transform a point specified in the local coordinates of this object to its location in the object's parent's coordinates.	GraphicElement
		validateDisplayList():void Called by the IGraphicElementContainer to redraw this element in its displayObject property.	GraphicElement
		validateNow():void Validates and updates the properties and layout of this object by immediately calling validateProperties(), validateSize(), and validateDisplayList(), if necessary.	GraphicElement
		validateProperties():void Used by layout logic to validate the properties of a component by calling the commitProperties() method.	GraphicElement
		validateSize():void Called by the IGraphicElementContainer to validate the size of this element.	GraphicElement
		valueOf():Object 會傳回指定之物件的基本值。	Object
		willTrigger(type:String):Boolean 檢查此 EventDispatcher 物件是否已註冊事件偵聽程式，或者此物件的任何祖系已為特定事件類型註冊事件偵聽程式。	EventDispatcher

保護方法

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	方法		定義自
		canSkipMeasurement():Boolean Determines if the call to the measure() method can be skipped.	GraphicElement
		commitProperties():void [覆寫] Processes the properties set on the element.	BitmapImage
		getStrokeExtents(postLayoutTransform:Boolean = true):Rectangle Returns the amount of pixels occupied by the stroke on each side of the element's bounds.	GraphicElement
		invalidateDisplayObjectSharing():void Utility method that notifies the host that this element has changed and needs its layer to be updated.	GraphicElement
		invalidateParentSizeAndDisplayList():void Helper method to invalidate parent size and display list if this object affects its layout (includeInLayout is true).	GraphicElement
		measure():void [覆寫] Calculates the default size of the element.	BitmapImage
		preferredHeightPreTransform():Number Used for the implementation of the ILayoutElement interface, returns the explicit measured height pre-transform.	GraphicElement
		preferredWidthPreTransform():Number Used for the implementation of the ILayoutElement interface, returns the explicit of measured width pre-transform.	GraphicElement
		transformHeightForLayout(width:Number, height:Number, postLayoutTransform:Boolean = true):Number Transform the element's size.	GraphicElement
		transformWidthForLayout(width:Number, height:Number, postLayoutTransform:Boolean = true):Number Transform the element's size.	GraphicElement
		updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void [覆寫] Draws the element and/or sizes and positions its content.	BitmapImage

事件

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	摘要	定義自
activate	[廣播事件] 當 Flash Player 或 AIR 應用程式取得作業系統焦點並成為作用中時傳送。	EventDispatcher
complete	Dispatched when content loading is complete.	BitmapImage
deactivate	[廣播事件] 當 Flash Player 或 AIR 應用程式失去作業系統焦點並成為非作用中時傳送。	EventDispatcher
httpStatus	Dispatched when a network request is made over HTTP and Flash Player or AIR can detect the HTTP status code.	BitmapImage
ioError	Dispatched when an input/output error occurs.	BitmapImage
progress	Dispatched when content is loading.	BitmapImage
ready	Dispatched when content loading is complete.	BitmapImage
securityError	Dispatched when a security error occurs.	BitmapImage

屬性詳細資訊

bitmapData

屬性

bitmapData:BitmapData [唯讀]

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 2.0

Returns a copy of the BitmapData object representing the currently loaded image content (unscaled). This property is null for untrusted cross domain content.

預設值為 null。

實作
public function get bitmapData():BitmapData

bytesLoaded

屬性

bytesLoaded:Number [唯讀]

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 2.0

The number of bytes of the image already loaded. Only relevant for images loaded by request URL.

預設值為 NaN。

實作
public function get bytesLoaded():Number

bytesTotal

屬性

bytesTotal:Number [唯讀]

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 2.0

The total image data in bytes loaded or pending load. Only relevant for images loaded by request URL.

預設值為 NaN。

實作
public function get bytesTotal():Number

clearOnLoad

屬性

clearOnLoad:Boolean

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 2.0

Denotes whether or not to clear previous image content prior to loading new content.

預設值為 true。

實作
public function get clearOnLoad():Boolean
public function set clearOnLoad(value:Boolean):void

contentLoader

屬性

contentLoader:IContentLoader

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 1.5

Optional custom image loader (e.g. image cache or queue) to associate with content loader client.

預設值為 null。

實作
public function get contentLoader():IContentLoader
public function set contentLoader(value:IContentLoader):void

contentLoaderGrouping

屬性

contentLoaderGrouping:String

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 1.5

Optional content grouping identifier to pass to the an associated IContentLoader instance's load() method. This property is only considered when a valid contentLoader is assigned.

實作
public function get contentLoaderGrouping():String
public function set contentLoaderGrouping(value:String):void

fillMode

屬性

fillMode:String

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

Determines how the bitmap fills in the dimensions. If you set the value of this property in a tag, use the string (such as "repeat"). If you set the value of this property in ActionScript, use the constant (such as mx.graphics.BitmapFillMode.CLIP).

When set to BitmapFillMode.CLIP ("clip"), the bitmap ends at the edge of the region.

When set to BitmapFillMode.REPEAT ("repeat"), the bitmap repeats to fill the region.

When set to BitmapFillMode.SCALE ("scale"), the bitmap stretches to fill the region.

預設值為 BitmapFillMode.SCALE。

實作
public function get fillMode():String
public function set fillMode(value:String):void

相關 API 元素

mx.graphics.BitmapFillMode

horizontalAlign

屬性

horizontalAlign:String

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

The horizontal alignment of the content when it does not have a one-to-one aspect ratio and scaleMode is set to mx.graphics.BitmapScaleMode.LETTERBOX.

Can be one of HorizontalAlign.LEFT ("left"), HorizontalAlign.RIGHT ("right"), or HorizontalAlign.CENTER ("center").

This property is only applicable when fillMode is set to to mx.graphics.BitmapFillMode.SCALE ("scale").

預設值為 HorizontalAlign.CENTER。

實作
public function get horizontalAlign():String
public function set horizontalAlign(value:String):void

preliminaryHeight

屬性

preliminaryHeight:Number

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 1.5

Provides an estimate to use for height when the "measured" bounds of the image is requested by layout, but the image data has yet to complete loading. When NaN the measured height is 0 until the image has finished loading.

預設值為 NaN。

實作
public function get preliminaryHeight():Number
public function set preliminaryHeight(value:Number):void

preliminaryWidth

屬性

preliminaryWidth:Number

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 1.5

Provides an estimate to use for width when the "measured" bounds of the image is requested by layout, but the image data has yet to complete loading. When NaN the measured width is 0 until the image has finished loading.

預設值為 NaN。

實作
public function get preliminaryWidth():Number
public function set preliminaryWidth(value:Number):void

scaleMode

屬性

scaleMode:String

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10.1, AIR 2.0

Determines how the image is scaled when fillMode is set to mx.graphics.BitmapFillMode.SCALE.

When set to mx.graphics.BitmapScaleMode.STRETCH ("stretch"), the image is stretched to fit.

When set to BitmapScaleMode.LETTERBOX ("letterbox"), the image is scaled with respect to the original unscaled image's aspect ratio.

When set to BitmapScaleMode.ZOOM ("zoom"), the image is scaled to fit with respect to the original unscaled image's aspect ratio. This results in cropping on one axis.

預設值為 BitmapScaleMode.STRETCH。

實作
public function get scaleMode():String
public function set scaleMode(value:String):void

smooth

屬性

smooth:Boolean

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

指定是否要將平滑化演算法套用至點陣圖影像。

若為 false，則使用最近鄰點法呈現放大後的點陣圖影像，影像會呈現像素化。若為 true，則使用雙線性插補法呈現放大後的點陣圖影像。使用最近鄰點法顯示影像通常較為快速。

預設值為 false。

實作
public function get smooth():Boolean
public function set smooth(value:Boolean):void

smoothingQuality

屬性

smoothingQuality:String

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 1.5

Determines how the image is down-scaled. When set to BitmapSmoothingQuality.HIGH, the image is resampled (if data is from a trusted source) to achieve a higher quality result. If set to BitmapSmoothingQuality.DEFAULT, the default stage quality for scaled bitmap fills is used.

預設值為 BitmapSmoothingQuality.DEFAULT。

實作
public function get smoothingQuality():String
public function set smoothingQuality(value:String):void

source

屬性

source:Object

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

The source used for the bitmap fill. The fill can render from various graphical sources, including the following:

A Bitmap or BitmapData instance.
A class representing a subclass of DisplayObject. The BitmapFill instantiates the class and creates a bitmap rendering of it.
An instance of a DisplayObject. The BitmapFill copies it into a Bitmap for filling.
The name of an external image file.

If you use an image file for the source, it can be of type PNG, GIF, or JPG.

To specify an embedded image source, you can use the @Embed directive, as the following example shows:

      source="@Embed('<i>image_location</i>')"

The image location can be specified via a URL, URLRequest, or file reference. If it is a file reference, its location is relative to the location of the file that is being compiled.

The BitmapImage class is designed to work with embedded images or images that are loaded at run time.

If the source is a Bitmap or BitmapData instance or is an external image file, it is the responsibility of the caller to dispose of the source once it is no longer needed. If ImageLoader created the BitmapData instance, then it will dispose of the BitmapData once the source has changed.

此屬性可以做為資料繫結的來源。一旦修改此屬性，將傳送 sourceChanged 事件。

實作
public function get source():Object
public function set source(value:Object):void

sourceHeight

屬性

sourceHeight:Number [唯讀]

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 1.5

Provides the unscaled height of the original image data.

預設值為 NaN。

實作
public function get sourceHeight():Number

sourceWidth

屬性

sourceWidth:Number [唯讀]

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 1.5

Provides the unscaled width of the original image data.

預設值為 NaN。

實作
public function get sourceWidth():Number

trustedSource

屬性

trustedSource:Boolean [唯讀]

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 9, AIR 1.5

A read-only flag denoting whether the currently loaded content is considered loaded form a source whose security policy allows for cross domain image access. When false, advanced bitmap operations such as high quality scaling, and tiling are not permitted. This flag is set once an image has been fully loaded.

預設值為 true。

實作
public function get trustedSource():Boolean

verticalAlign

屬性

verticalAlign:String

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 1.5

The vertical alignment of the content when it does not have a one-to-one aspect ratio and scaleMode is set to mx.graphics.BitmapScaleMode.LETTERBOX.

Can be one of VerticalAlign.TOP ("top"), VerticalAlign.BOTTOM ("bottom"), or VerticalAlign.MIDDLE ("middle").

This property is only applicable when scaleMode is set to to BitmapFillMode.SCALE ("scale").

預設值為 VerticalAlign.MIDDLE。

實作
public function get verticalAlign():String
public function set verticalAlign(value:String):void

建構函式詳細資料

()

建構函式

public function BitmapImage()

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

Constructor.

方法詳細資訊

commitProperties

()

方法

override protected function commitProperties():void

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

Processes the properties set on the element. This is an advanced method that you might override when creating a subclass.

You do not call this method directly. Flex calls the commitProperties() method when you use the addElement() method to add an element to an IGraphicElementContainer container such as Group, or when you call the invalidateProperties() method of the element. Calls to the commitProperties() method occur before calls to the measure() method. This lets you set property values that might be used by the measure() method.

Some elements have properties that interact with each other. It is often best at startup time to process all of these properties at one time to avoid duplicating work.

measure

()

方法

override protected function measure():void

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

Calculates the default size of the element. This is an advanced method that you might override when creating a subclass of GraphicElement.

You do not call this method directly. Flex calls the measure() method when the element is added to an IGraphicElementContainer container such as Group using the addElement() method, and when the element's invalidateSize() method is called.

By default you set both explicit height and explicit width of an element, Flex does not call the measure() method, even if you explicitly call the invalidateSize() method. To override this behavior, override skipMeasure() method.

In your override of this method, you must set the measuredWidth and measuredHeight properties to define the default size. You can optionally set the measuredX and measuredY properties to define the default measured bounds top-left corner relative to the origin of the element.

The conceptual point of measure() is for the element to provide its own natural or intrinsic bounds as a default. Therefore, the measuredWidth and measuredHeight properties should be determined by factors such as:

The amount of text the component needs to display.
The size of a JPEG image that the component displays.

In some cases, there is no intrinsic way to determine default values. For example, a simple GreenCircle element might simply set measuredWidth = 100 and measuredHeight = 100 in its measure() method to provide a reasonable default size. In other cases, such as a TextArea, an appropriate computation (such as finding the right width and height that would just display all the text and have the aspect ratio of a Golden Rectangle) might be too time-consuming to be worthwhile.

The default implementation of measure() sets the values of the measuredWidth, measuredHeight, measuredX, and measuredY properties to 0.

updateDisplayList

()

方法

override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void

語言版本:

ActionScript 3.0

產品版本:

Flex 4

執行階段版本:

Flash Player 10, AIR 1.5

Draws the element and/or sizes and positions its content. This is an advanced method that you might override when creating a subclass of GraphicElement.

You do not call this method directly. Flex calls the updateDisplayList() method when the component is added to an IGraphicElementContainer container such as Group using the addElement() method, and when the element's invalidateDisplayList() method is called.

This method is where you would do programmatic drawing using methods on the elements's displayObject such as graphics.drawRect().

參數

	`unscaledWidth:Number` — Specifies the width of the component, in pixels, in the component's coordinates, regardless of the value of the `scaleX` property of the component.

	`unscaledHeight:Number` — Specifies the height of the component, in pixels, in the component's coordinates, regardless of the value of the `scaleY` property of the component.

事件詳細資訊

complete

事件

事件物件類型: flash.events.Event
屬性 Event.type = flash.events.Event.COMPLETE

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 2.0

Dispatched when content loading is complete. This event is only dispatched for url and ByteArray based sources (those sources requiring a Loader).

Note that for content loaded via Loader, both ready and complete events are dispatched.

For other source types such as embeds, only ready is dispatched.

Event.COMPLETE 常數會定義 complete 事件物件的 type 屬性值。

這個事件具有下列屬性：

屬性	值
`bubbles`	`false`
`cancelable`	`false`；沒有要取消的預設行為指令。
`currentTarget`	正主動使用事件偵聽程式處理 Event 物件的物件。
`target`	已完成載入的網路物件。

httpStatus

事件

事件物件類型: flash.events.HTTPStatusEvent
屬性 HTTPStatusEvent.type = flash.events.HTTPStatusEvent.HTTP_STATUS

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 2.0

Dispatched when a network request is made over HTTP and Flash Player or AIR can detect the HTTP status code.

HTTPStatusEvent.HTTP_STATUS 常數會定義 httpStatus 事件物件的 type 屬性值。

這個事件具有下列屬性：

屬性	值
`bubbles`	`false`
`cancelable`	`false`；沒有要取消的預設行為指令。
`currentTarget`	正主動使用事件偵聽程式處理 Event 物件的物件。
`status`	伺服器傳回的 HTTP 狀態碼。
`target`	接收 HTTP 狀態碼的網路物件。

ioError

事件

事件物件類型: flash.events.IOErrorEvent
屬性 IOErrorEvent.type = flash.events.IOErrorEvent.IO_ERROR

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 2.0

Dispatched when an input/output error occurs.

定義 ioError 事件物件的 type 屬性值。

這個事件具有下列屬性：

屬性	值
`bubbles`	`false`
`cancelable`	`false`；沒有要取消的預設行為指令。
`currentTarget`	正主動使用事件偵聽程式處理 Event 物件的物件。
`errorID`	與特定錯誤相關聯的參考號碼 (僅限 AIR)。
`target`	遭遇輸入/輸出錯誤的網路物件。
`text`	要顯示為錯誤訊息的文字。

相關 API 元素

flash.events.IOErrorEvent

progress

事件

事件物件類型: flash.events.ProgressEvent
屬性 ProgressEvent.type = flash.events.ProgressEvent.PROGRESS

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 2.0

Dispatched when content is loading.

Note: The progress event is not guaranteed to be dispatched. The complete event may be received, without any progress events being dispatched. This can happen when the loaded content is a local file.

定義 progress 事件物件的 type 屬性值。

這個事件具有下列屬性：

屬性	值
`bubbles`	`false`
`bytesLoaded`	在偵聽程式處理事件時，載入的項目或位元組數目。
`bytesTotal`	如果載入程序成功時，最終將載入的項目或位元組總數。
`cancelable`	`false`；沒有要取消的預設行為指令。
`currentTarget`	正主動使用事件偵聽程式處理 Event 物件的物件。
`target`	回報進度的物件。

ready

事件

事件物件類型: mx.events.FlexEvent
屬性 FlexEvent.type = mx.events.FlexEvent.READY

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 2.0

Dispatched when content loading is complete. Unlike the complete event, this event is dispatched for all source types.

Note that for content loaded via Loader, both ready and complete events are dispatched.

For other source types such as embeds, only ready is dispatched.

The FlexEvent.READY constant defines the value of the type property of the event object for a ready event. This event is dispatched by the BitmapImage and spark Image classes to denote that the assigned image source has fully loaded.

The properties of the event object have the following values:

Property	Value
`bubbles`	false
`cancelable`	false
`returnValue`	null
`currentTarget`	The Object that defines the event listener that handles the event. For example, if you use `myImage.addEventListener()` to register an event listener, myImage is the value of the `currentTarget`.
`target`	The Object that dispatched the event; it is not always the Object listening for the event. Use the `currentTarget` property to always access the Object listening for the event.
`Type`	FlexEvent.READY

securityError

事件

事件物件類型: flash.events.SecurityErrorEvent
屬性 SecurityErrorEvent.type = flash.events.SecurityErrorEvent.SECURITY_ERROR

語言版本:

ActionScript 3.0

產品版本:

Flex 4.5

執行階段版本:

Flash Player 10, AIR 2.0

Dispatched when a security error occurs.

SecurityErrorEvent.SECURITY_ERROR 常數會定義 securityError 事件物件的 type 屬性值。

這個事件具有下列屬性：

屬性	值
`bubbles`	`false`
`cancelable`	`false`；沒有要取消的預設行為指令。
`currentTarget`	正主動使用事件偵聽程式處理 Event 物件的物件。
`target`	回報安全性錯誤的網路物件。
`text`	要顯示為錯誤訊息的文字。

相關 API 元素

flash.events.SecurityErrorEvent

範例如何使用本範例

BitmapImageExample.mxml

<?xml version="1.0" encoding="utf-8"?>
<!-- BitmapGraphicExample.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark">

    <s:Panel title="Bitmap Graphic Example"
            width="75%" height="75%"
            horizontalCenter="0" verticalCenter="0">
        <s:Group left="10" right="10" top="10" bottom="10">
            <!-- Single image, not resized, not repeated. -->
            <s:Graphic x="0" y="0">             
                <s:BitmapImage id="bg1" source="@Embed('assets/AirIcon12x12.gif')" fillMode="clip"/>
            </s:Graphic>

            <!-- Single image, scaled to fit specified dimensions. -->
            <s:Graphic x="150" y="0">
                <s:BitmapImage id="bg2" source="@Embed('assets/AirIcon12x12.gif')" width="60" height="60" fillMode="scale"/>
            </s:Graphic>

            <!-- Repeated image to fit specified dimensions. -->
            <s:Graphic x="300" y="0">
                <s:BitmapImage id="bg3" source="@Embed('assets/AirIcon12x12.gif')" width="120" height="120" fillMode="repeat"/>
            </s:Graphic>
        </s:Group>
    </s:Panel>

</s:Application>

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BitmapImage - AS3 Flex

類別 x

bitmapData

bytesLoaded

bytesTotal

clearOnLoad

contentLoader

contentLoaderGrouping

fillMode

horizontalAlign

preliminaryHeight

preliminaryWidth

scaleMode

smooth

smoothingQuality

source

sourceHeight

sourceWidth

trustedSource

verticalAlign

BitmapImage

commitProperties

measure

updateDisplayList

complete

httpStatus

ioError

progress

ready

securityError