| Pacchetto | mx.containers |
| Classe | public class Canvas |
| Ereditarietà | Canvas  Container UIComponent FlexSprite Sprite DisplayObjectContainer InteractiveObject DisplayObject EventDispatcher Object |
| Implementa | IConstraintLayout |
| Sottoclassi | AttachmentHeaderBase, LabeledHRule, PanelContent, ProgressSectionBarNav, RendererBase, ResourceContainer, StartProcessBase, ToDoBase, Tracking, Workspace |
| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
 | A partire da Flex 4.0, Adobe consiglia di utilizzare la classe spark.components.BorderContainer come alternativa a questa classe. |
| A partire da Flex 4.0, Adobe consiglia di utilizzare la classe spark.components.Group come alternativa a questa classe. |
A Halo Canvas layout container defines a rectangular region in which you place child containers and controls. It is the only container that lets you explicitly specify the location of its children within the container by using the
x and
y properties of each child.
Note: Adobe recommends that, when possible, you use the Spark containers with BasicLayout instead of the Halo Canvas container.
Flex sets the children of a Canvas layout container to their
preferred width and preferred height.
You may override the value for a child's
preferred width by setting its width property to either
a fixed pixel value or a percentage of the container size.
You can set the preferred height in a similar manner.
If you use percentage sizing inside a Canvas container, some of your components may overlap. If this is not the effect you want, plan your component positions and sizes carefully.
The Canvas container has the following default sizing characteristics:
| Characteristic | Description |
|---|---|
| Default size | Large enough to hold all its children at the default sizes of the children |
| Default padding | 0 pixels for the top, bottom, left, and right values |
Mostra sintassi MXML
Nascondi sintassi MXMLThe <mx:Canvas> tag inherits all the tag attributes
of its superclass. Use the following syntax:
<mx:Canvas>
...
child tags
...
</mx:Canvas>
Altri esempi
Elementi API correlati
Proprietà pubbliche
| Proprietà | Definito da | ||
|---|---|---|---|
 | accessibilityDescription : String
A convenience accessor for the description property
in this UIComponent's accessibilityProperties object. | UIComponent | |
| accessibilityEnabled : Boolean
A convenience accessor for the silent property
in this UIComponent's accessibilityProperties object. | UIComponent | |
| accessibilityImplementation : AccessibilityImplementation
L'implementazione di accessibilità corrente (AccessibilityImplementation) di questa istanza InteractiveObject. | InteractiveObject | |
| accessibilityName : String
A convenience accessor for the name property
in this UIComponent's accessibilityProperties object. | UIComponent | |
| accessibilityProperties : AccessibilityProperties
Le opzioni di accessibilità correnti di questo oggetto di visualizzazione. | DisplayObject | |
| accessibilityShortcut : String
A convenience accessor for the shortcut property
in this UIComponent's accessibilityProperties object. | UIComponent | |
| activeEffects : Array [sola lettura]
The list of effects that are currently playing on the component,
as an Array of EffectInstance instances. | UIComponent | |
| alpha : Number
Indica il valore della trasparenza alfa dell'oggetto specificato. | DisplayObject | |
| autoLayout : Boolean
If true, measurement and layout are done
when the position or size of a child is changed. | Container | |
| automationDelegate : Object
The delegate object that handles the automation-related functionality. | UIComponent | |
| automationEnabled : Boolean [sola lettura]
True if this component is enabled for automation, false
otherwise. | UIComponent | |
| automationName : String
Name that can be used as an identifier for this object. | UIComponent | |
| automationOwner : DisplayObjectContainer [sola lettura]
The owner of this component for automation purposes. | UIComponent | |
| automationParent : DisplayObjectContainer [sola lettura]
The parent of this component for automation purposes. | UIComponent | |
| automationTabularData : Object [sola lettura]
An implementation of the IAutomationTabularData interface, which
can be used to retrieve the data. | UIComponent | |
| automationValue : Array [sola lettura]
This value generally corresponds to the rendered appearance of the
object and should be usable for correlating the identifier with
the object as it appears visually within the application. | UIComponent | |
| automationVisible : Boolean [sola lettura]
True if this component is visible for automation, false
otherwise. | UIComponent | |
| baseline : Object
For components, this layout constraint property is a
facade on top of the similarly-named style. | UIComponent | |
| baselinePosition : Number [sola lettura]
The y-coordinate of the baseline
of the first line of text of the component. | UIComponent | |
| blendMode : String
Un valore della classe BlendMode che specifica il metodo di fusione da utilizzare. | DisplayObject | |
| blendShader : Shader [sola scrittura]
Imposta uno shader utilizzato per la fusione dei colori di primo piano e sfondo. | DisplayObject | |
| borderMetrics : EdgeMetrics [sola lettura]
Returns an EdgeMetrics object that has four properties:
left, top, right,
and bottom. | Container | |
| bottom : Object
For components, this layout constraint property is a
facade on top of the similarly-named style. | UIComponent | |
| buttonMode : Boolean
Specifica la modalità pulsante di questo sprite. | Sprite | |
| cacheAsBitmap : Boolean
Se è impostata su true, nella cache dei runtime Flash viene memorizzata una rappresentazione bitmap interna dell'oggetto di visualizzazione. | DisplayObject | |
| cacheAsBitmapMatrix : Matrix
Se il valore è diverso da null, questo oggetto Matrix definisce il modo in cui viene eseguito il rendering di un oggetto di visualizzazione quando cacheAsBitmap è impostato su true. | DisplayObject | |
| cacheHeuristic : Boolean [sola scrittura]
Used by Flex to suggest bitmap caching for the object. | UIComponent | |
| cachePolicy : String
Specifies the bitmap caching policy for this object. | UIComponent | |
| childDescriptors : Array [sola lettura]
Array of UIComponentDescriptor objects produced by the MXML compiler. | Container | |
| className : String [sola lettura]
The name of this instance's class, such as "Button". | UIComponent | |
| clipContent : Boolean
Whether to apply a clip mask if the positions and/or sizes
of this container's children extend outside the borders of
this container. | Container | |
| constraintColumns : Array
An Array of ConstraintColumn instances that partition this container. | Canvas | ||
| constraintRows : Array
An Array of ConstraintRow instances that partition this container. | Canvas | ||
| constructor : Object
Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto. | Object | |
| contentMouseX : Number [override] [sola lettura]
Returns the x position of the mouse, in the content coordinate system. | Container | |
| contentMouseY : Number [override] [sola lettura]
Returns the y position of the mouse, in the content coordinate system. | Container | |
| contextMenu : NativeMenu
Specifica il menu di scelta rapida associato all'oggetto. | InteractiveObject | |
| creatingContentPane : Boolean
Containers use an internal content pane to control scrolling. | Container | |
| creationIndex : int Obsoleti: Deprecated
Specifies the order to instantiate and draw the children
of the container. | Container | |
| creationPolicy : String
The child creation policy for this MX Container. | Container | |
| currentState : String
The current view state of the component. | UIComponent | |
| cursorManager : ICursorManager [sola lettura]
Gets the CursorManager that controls the cursor for this component
and its peers. | UIComponent | |
| data : Object
The data property lets you pass a value
to the component when you use it in an item renderer or item editor. | Container | |
| defaultButton : IFlexDisplayObject
The Button control designated as the default button
for the container. | Container | |
| deferredContentCreated : Boolean [sola lettura]
IDeferredContentOwner equivalent of processedDescriptors
| Container | |
| depth : Number
Determines the order in which items inside of containers
are rendered. | UIComponent | |
| descriptor : UIComponentDescriptor
Reference to the UIComponentDescriptor, if any, that was used
by the createComponentFromDescriptor() method to create this
UIComponent instance. | UIComponent | |
| designLayer : DesignLayer
Specifies the optional DesignLayer instance associated with this visual
element. | UIComponent | |
| document : Object
A reference to the document object associated with this UIComponent. | UIComponent | |
| doubleClickEnabled : Boolean [override]
Specifies whether the UIComponent object receives doubleClick events. | UIComponent | |
| dropTarget : DisplayObject [sola lettura]
Specifica l'oggetto di visualizzazione sopra il quale viene trascinato lo sprite o sul quale viene rilasciato. | Sprite | |
| enabled : Boolean
Whether the component can accept user interaction. | UIComponent | |
| errorString : String
The text that displayed by a component's error tip when a
component is monitored by a Validator and validation fails. | UIComponent | |
| explicitHeight : Number
Number that specifies the explicit height of the component,
in pixels, in the component's coordinates. | UIComponent | |
| explicitMaxHeight : Number
The maximum recommended height of the component to be considered
by the parent during layout. | UIComponent | |
| explicitMaxWidth : Number
The maximum recommended width of the component to be considered
by the parent during layout. | UIComponent | |
| explicitMinHeight : Number
The minimum recommended height of the component to be considered
by the parent during layout. | UIComponent | |
| explicitMinWidth : Number
The minimum recommended width of the component to be considered
by the parent during layout. | UIComponent | |
| explicitWidth : Number
Number that specifies the explicit width of the component,
in pixels, in the component's coordinates. | UIComponent | |
| filters : Array
Un array indicizzato che contiene ogni oggetto filtro attualmente associato all'oggetto di visualizzazione. | DisplayObject | |
| flexContextMenu : IFlexContextMenu
The context menu for this UIComponent. | UIComponent | |
| focusEnabled : Boolean
Indicates whether the component can receive focus when tabbed to. | UIComponent | |
| focusManager : IFocusManager
Gets the FocusManager that controls focus for this component
and its peers. | UIComponent | |
| focusPane : Sprite
The focus pane associated with this object. | UIComponent | |
| focusRect : Object
Specifica se l'oggetto visualizza un rettangolo di attivazione. | InteractiveObject | |
| graphics : Graphics [sola lettura]
Specifica l'oggetto Graphics che appartiene a questo oggetto Sprite, in cui possono essere eseguiti i comandi di disegno vettoriale. | Sprite | |
| hasFocusableChildren : Boolean
A flag that indicates whether child objects can receive focus. | UIComponent | |
| hasLayoutMatrix3D : Boolean [sola lettura]
Contains true if the element has 3D Matrix. | UIComponent | |
| height : Number [override]
Number that specifies the height of the component, in pixels,
in the parent's coordinates. | UIComponent | |
| hitArea : Sprite
Definisce un altro sprite come area attiva di uno sprite. | Sprite | |
| horizontalCenter : Object
For components, this layout constraint property is a
facade on top of the similarly-named style. | UIComponent | |
| horizontalLineScrollSize : Number
Number of pixels to move when the left- or right-arrow
button in the horizontal scroll bar is pressed. | Container | |
| horizontalPageScrollSize : Number
Number of pixels to move when the track in the
horizontal scroll bar is pressed. | Container | |
| horizontalScrollBar : ScrollBar
The horizontal scrollbar used in this container. | Container | |
| horizontalScrollPolicy : String
Specifies whether the horizontal scroll bar is always present,
always absent, or automatically added when needed. | Container | |
| horizontalScrollPosition : Number
The current position of the horizontal scroll bar. | Container | |
| icon : Class
The Class of the icon displayed by some navigator
containers to represent this Container. | Container | |
| id : String
ID of the component. | UIComponent | |
| includeInLayout : Boolean
Specifies whether this component is included in the layout of the
parent container. | UIComponent | |
| inheritingStyles : Object
The beginning of this component's chain of inheriting styles. | UIComponent | |
| initialized : Boolean
A flag that determines if an object has been through all three phases
of layout: commitment, measurement, and layout (provided that any were required). | UIComponent | |
| instanceIndex : int [sola lettura]
The index of a repeated component. | UIComponent | |
| instanceIndices : Array
An Array containing the indices required to reference
this UIComponent object from its parent document. | UIComponent | |
| is3D : Boolean [sola lettura]
Contains true when the element is in 3D. | UIComponent | |
| isDocument : Boolean [sola lettura]
Contains true if this UIComponent instance is a document object. | UIComponent | |
| isPopUp : Boolean
Set to true by the PopUpManager to indicate
that component has been popped up. | UIComponent | |
| label : String
The text displayed by some navigator containers to represent
this Container. | Container | |
| layoutMatrix3D : Matrix3D [sola scrittura]
The transform matrix that is used to calculate a component's layout
relative to its siblings. | UIComponent | |
| left : Object
For components, this layout constraint property is a
facade on top of the similarly-named style. | UIComponent | |
| loaderInfo : LoaderInfo [sola lettura]
Restituisce un oggetto LoaderInfo contenente informazioni sul caricamento del file al quale questo oggetto di visualizzazione appartiene. | DisplayObject | |
| maintainProjectionCenter : Boolean
When true, the component keeps its projection matrix centered on the
middle of its bounding box. | UIComponent | |
| mask : DisplayObject
L'oggetto di visualizzazione chiamante viene mascherato dall'oggetto mask specificato. | DisplayObject | |
| maxHeight : Number
The maximum recommended height of the component to be considered
by the parent during layout. | UIComponent | |
| maxHorizontalScrollPosition : Number [sola lettura]
The largest possible value for the
horizontalScrollPosition property. | Container | |
| maxVerticalScrollPosition : Number [sola lettura]
The largest possible value for the
verticalScrollPosition property. | Container | |
| maxWidth : Number
The maximum recommended width of the component to be considered
by the parent during layout. | UIComponent | |
| measuredHeight : Number
The default height of the component, in pixels. | UIComponent | |
| measuredMinHeight : Number
The default minimum height of the component, in pixels. | UIComponent | |
| measuredMinWidth : Number
The default minimum width of the component, in pixels. | UIComponent | |
| measuredWidth : Number
The default width of the component, in pixels. | UIComponent | |
| metaData : Object
Ottiene l’oggetto di metadati dell’istanza DisplayObject se i metadati sono stati memorizzati insieme all’istanza di questo DisplayObject nel file SWF mediante un tag PlaceObject4. | DisplayObject | |
| minHeight : Number
The minimum recommended height of the component to be considered
by the parent during layout. | UIComponent | |
| minWidth : Number
The minimum recommended width of the component to be considered
by the parent during layout. | UIComponent | |
| moduleFactory : IFlexModuleFactory
A module factory is used as context for using embedded fonts and for
finding the style manager that controls the styles for this
component. | UIComponent | |
| mouseChildren : Boolean
Determina se gli elementi secondari dell'oggetto sono abilitati o meno per il mouse o per il dispositivo di input dell'utente. | DisplayObjectContainer | |
| mouseEnabled : Boolean
Specifica se questo oggetto riceve messaggi del mouse o di altri dispositivi di input dell'utente. | InteractiveObject | |
| mouseFocusEnabled : Boolean
Whether you can receive focus when clicked on. | UIComponent | |
| mouseX : Number [sola lettura]
Indica la coordinata x del mouse o la posizione del dispositivo di input dell'utente, espressa in pixel. | DisplayObject | |
| mouseY : Number [sola lettura]
Indica la coordinata y del mouse o la posizione del dispositivo di input dell'utente, espressa in pixel. | DisplayObject | |
| name : String
Indica il nome dell'istanza dell'oggetto DisplayObject. | DisplayObject | |
| needsSoftKeyboard : Boolean
Specifica se deve essere visualizzata una tastiera virtuale (una tastiera software a video) quando questa istanza InteractiveObject riceve lo stato di attivazione. | InteractiveObject | |
| nestLevel : int
Depth of this object in the containment hierarchy. | UIComponent | |
| nonInheritingStyles : Object
The beginning of this component's chain of non-inheriting styles. | UIComponent | |
| numAutomationChildren : int [sola lettura]
The number of automation children this container has. | UIComponent | |
| numChildren : int [override] [sola lettura]
Number of child components in this container. | Container | |
| numElements : int [sola lettura]
The number of visual elements in this container. | Container | |
| opaqueBackground : Object
Specifica se l'oggetto di visualizzazione è opaco con un determinato colore di sfondo. | DisplayObject | |
| owner : DisplayObjectContainer
The owner of this IVisualElement object. | UIComponent | |
| parent : DisplayObjectContainer [override] [sola lettura]
The parent container or component for this component. | UIComponent | |
| parentApplication : Object [sola lettura]
A reference to the Application object that contains this UIComponent
instance. | UIComponent | |
| parentDocument : Object [sola lettura]
A reference to the parent document object for this UIComponent. | UIComponent | |
| percentHeight : Number
Specifies the height of a component as a percentage
of its parent's size. | UIComponent | |
| percentWidth : Number
Specifies the width of a component as a percentage
of its parent's size. | UIComponent | |
| 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. | UIComponent | |
| processedDescriptors : Boolean
Set to true after immediate or deferred child creation,
depending on which one happens. | UIComponent | |
| rawChildren : IChildList [sola lettura]
A container typically contains child components, which can be enumerated
using the Container.getChildAt() method and
Container.numChildren property. | Container | |
| repeater : IRepeater [sola lettura]
A reference to the Repeater object
in the parent document that produced this UIComponent. | UIComponent | |
| repeaterIndex : int [sola lettura]
The index of the item in the data provider
of the Repeater that produced this UIComponent. | UIComponent | |
| repeaterIndices : Array
An Array containing the indices of the items in the data provider
of the Repeaters in the parent document that produced this UIComponent. | UIComponent | |
| repeaters : Array
An Array containing references to the Repeater objects
in the parent document that produced this UIComponent. | UIComponent | |
| right : Object
For components, this layout constraint property is a
facade on top of the similarly-named style. | UIComponent | |
| root : DisplayObject [sola lettura]
Nel caso di un oggetto di visualizzazione all'interno di un file SWF caricato, la proprietà principale è l'oggetto di visualizzazione più in alto nella porzione della struttura dell'elenco di visualizzazione rappresentata da quel file SWF. | DisplayObject | |
| rotation : Number [override]
Indica la rotazione dell'istanza DisplayObject, espressa in gradi, rispetto alla posizione originale. | UIComponent | |
| rotationX : Number [override]
Indicates the x-axis rotation of the DisplayObject instance, in degrees, from its original orientation
relative to the 3D parent container. | UIComponent | |
| rotationY : Number [override]
Indicates the y-axis rotation of the DisplayObject instance, in degrees, from its original orientation
relative to the 3D parent container. | UIComponent | |
| rotationZ : Number [override]
Indicates the z-axis rotation of the DisplayObject instance, in degrees, from its original orientation relative to the 3D parent container. | UIComponent | |
| scale9Grid : Rectangle
La griglia di modifica in scala attualmente attiva. | DisplayObject | |
| scaleX : Number [override]
Number that specifies the horizontal scaling factor. | UIComponent | |
| scaleY : Number [override]
Number that specifies the vertical scaling factor. | UIComponent | |
| scaleZ : Number [override]
Number that specifies the scaling factor along the z axis. | UIComponent | |
| screen : Rectangle [sola lettura]
Returns an object that contains the size and position of the base
drawing surface for this object. | UIComponent | |
| scrollRect : Rectangle
I limiti del rettangolo di scorrimento dell'oggetto di visualizzazione. | DisplayObject | |
| showInAutomationHierarchy : Boolean
A flag that determines if an automation object
shows in the automation hierarchy. | UIComponent | |
| softKeyboard : String
Controlla l'aspetto della tastiera software. | InteractiveObject | |
| softKeyboardInputAreaOfInterest : Rectangle
Definisce l’area che deve rimanere visibile sullo schermo quando è visualizzata una tastiera virtuale (non disponibile in iOS). | InteractiveObject | |
| soundTransform : flash.media:SoundTransform
Controlla il suono nello sprite. | Sprite | |
| stage : Stage [sola lettura]
Lo stage dell'oggetto di visualizzazione. | DisplayObject | |
| states : Array
The view states that are defined for this component. | UIComponent | |
| styleDeclaration : CSSStyleDeclaration
Storage for the inline inheriting styles on this object. | UIComponent | |
| styleManager : IStyleManager2 [sola lettura]
Returns the StyleManager instance used by this component. | UIComponent | |
| styleName : Object
The class style used by this component. | UIComponent | |
| styleParent : IAdvancedStyleClient
A component's parent is used to evaluate descendant selectors. | UIComponent | |
| systemManager : ISystemManager
Returns the SystemManager object used by this component. | UIComponent | |
| tabChildren : Boolean
Determina se gli elementi secondari dell'oggetto sono abilitati per la tabulazione. | DisplayObjectContainer | |
| tabEnabled : Boolean
Specifica se questo oggetto è incluso nell'ordine di tabulazione. | InteractiveObject | |
| tabFocusEnabled : Boolean
A flag that indicates whether this object can receive focus
via the TAB key
This is similar to the tabEnabled property
used by the Flash Player.
This is usually true for components that
handle keyboard input, but some components in controlbars
have them set to false because they should not steal
focus from another component like an editor. | UIComponent | |
| tabIndex : int
Specifica l'ordine di tabulazione degli oggetti in un file SWF. | InteractiveObject | |
| textSnapshot : flash.text:TextSnapshot [sola lettura]
Restituisce un oggetto TextSnapshot per questa istanza DisplayObjectContainer. | DisplayObjectContainer | |
| toolTip : String
Text to display in the ToolTip. | UIComponent | |
| top : Object
For components, this layout constraint property is a
facade on top of the similarly-named style. | UIComponent | |
| transform : flash.geom:Transform [override]
An object with properties pertaining to a display object's matrix, color transform,
and pixel bounds. | UIComponent | |
| transformX : Number
Sets the x coordinate for the transform center of the component. | UIComponent | |
| transformY : Number
Sets the y coordinate for the transform center of the component. | UIComponent | |
| transformZ : Number
Sets the z coordinate for the transform center of the component. | UIComponent | |
| transitions : Array
An Array of Transition objects, where each Transition object defines a
set of effects to play when a view state change occurs. | UIComponent | |
| tweeningProperties : Array
Array of properties that are currently being tweened on this object. | UIComponent | |
| uid : String
A unique identifier for the object. | UIComponent | |
| updateCompletePendingFlag : Boolean
A flag that determines if an object has been through all three phases
of layout validation (provided that any were required). | UIComponent | |
| useHandCursor : Boolean
Un valore booleano che indica se viene visualizzato un cursore a forma di mano quando il puntatore passa sopra uno sprite in cui la proprietà buttonMode è impostata su true. | Sprite | |
| validationSubField : String
Used by a validator to associate a subfield with this component. | UIComponent | |
| verticalCenter : Object
For components, this layout constraint property is a
facade on top of the similarly-named style. | UIComponent | |
| verticalLineScrollSize : Number
Number of pixels to scroll when the up- or down-arrow
button in the vertical scroll bar is pressed,
or when you scroll by using the mouse wheel. | Container | |
| verticalPageScrollSize : Number
Number of pixels to scroll when the track
in the vertical scroll bar is pressed. | Container | |
| verticalScrollBar : ScrollBar
The vertical scrollbar used in this container. | Container | |
| verticalScrollPolicy : String
Specifies whether the vertical scroll bar is always present,
always absent, or automatically added when needed. | Container | |
| verticalScrollPosition : Number
The current position of the vertical scroll bar. | Container | |
| viewMetrics : EdgeMetrics [sola lettura]
Returns an object that has four properties: left,
top, right, and bottom. | Container | |
| viewMetricsAndPadding : EdgeMetrics [sola lettura]
Returns an object that has four properties: left,
top, right, and bottom. | Container | |
| visible : Boolean [override]
Whether or not the display object is visible. | UIComponent | |
| width : Number [override]
Number that specifies the width of the component, in pixels,
in the parent's coordinates. | UIComponent | |
| x : Number [override]
Number that specifies the component's horizontal position,
in pixels, within its parent container. | UIComponent | |
| y : Number [override]
Number that specifies the component's vertical position,
in pixels, within its parent container. | UIComponent | |
| z : Number [override]
Indicates the z coordinate position along the z-axis of the DisplayObject
instance relative to the 3D parent container. | UIComponent | |
Proprietà protette
Metodi pubblici
| Metodo | Definito da | ||
|---|---|---|---|
Canvas()
Constructor. | Canvas | ||
| [override]
Adds a child DisplayObject to this Container. | Container | |
| [override]
Adds a child DisplayObject to this Container. | Container | |
|
Adds a visual element to this container. | Container | |
|
Adds a visual element to this container. | Container | |
| addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registra un oggetto listener di eventi con un oggetto EventDispatcher, in modo che il listener riceva la notifica di un evento. | EventDispatcher | |
|
Adds a non-visual style client to this component instance. | UIComponent | |
|
Indica se le restrizioni di sicurezza possono determinare l'omissione di eventuali oggetti di visualizzazione dall'elenco restituito dalla chiamata al metodo DisplayObjectContainer.getObjectsUnderPoint() con il punto specificato. | DisplayObjectContainer | |
|
Queues a function to be called later. | UIComponent | |
|
Deletes a style property from this component instance. | UIComponent | |
|
Determina se l'oggetto di visualizzazione specificato è un elemento secondario dell'istanza DisplayObjectContainer oppure è l'istanza stessa. | DisplayObjectContainer | |
| [override]
Converts a Point object from content coordinates to global coordinates. | Container | |
| [override]
Converts a Point object from content to local coordinates. | Container | |
|
Returns a set of properties that identify the child within
this container. | UIComponent | |
|
Returns a set of properties that identify the child within
this container. | UIComponent | |
|
Given a single UIComponentDescriptor, create the corresponding
component and add the component as a child of this Container. | Container | |
|
Iterate through the Array of childDescriptors,
and call the createComponentFromDescriptor() method for each one. | Container | |
|
Performs the equivalent action of calling
the createComponentsFromDescriptors(true) method for containers
that implement the IDeferredContentOwner interface to support deferred instantiation. | Container | |
|
Creates an id reference to this IUIComponent object
on its parent document object. | UIComponent | |
|
Deletes the id reference to this IUIComponent object
on its parent document object. | UIComponent | |
|
Returns a UITextFormat object corresponding to the text styles
for this UIComponent. | UIComponent | |
| [override]
Dispatches an event into the event flow. | UIComponent | |
|
Shows or hides the focus indicator around this component. | UIComponent | |
| drawRoundRect(x:Number, y:Number, w:Number, h:Number, r:Object = null, c:Object = null, alpha:Object = null, rot:Object = null, gradient:String = null, ratios:Array = null, hole:Object = null):void
Programmatically draws a rectangle into this skin's Graphics object. | UIComponent | |
|
Called by the effect instance when it stops playing on the component. | UIComponent | |
|
Called by the effect instance when it starts playing on the component. | UIComponent | |
|
Ends all currently playing effects on the component. | UIComponent | |
| [override]
Executes all the data bindings on this Container. | Container | |
|
Executes the bindings into this Container's child UIComponent objects. | Container | |
|
Called after printing is complete. | UIComponent | |
|
Provides the automation object at the specified index. | UIComponent | |
|
Provides the automation object list . | UIComponent | |
|
Restituisce un rettangolo che definisce l'area dell'oggetto di visualizzazione relativa al sistema di coordinate dell'oggetto targetCoordinateSpace. | DisplayObject | |
|
Returns the x coordinate of the element's bounds at the specified element size. | UIComponent | |
|
Returns the y coordinate of the element's bounds at the specified element size. | UIComponent | |
| [override]
Gets the nth child component object. | Container | |
| [override]
Returns the child whose name property is the specified String. | Container | |
| [override]
Gets the zero-based index of a specific child. | Container | |
|
Returns an Array of DisplayObject objects consisting of the content children
of the container. | Container | |
|
Finds the type selectors for this UIComponent instance. | UIComponent | |
|
Returns a layout constraint value, which is the same as
getting the constraint style for this component. | UIComponent | |
|
Returns the visual element at the specified index. | Container | |
|
Returns the index position of a visual element. | Container | |
|
A convenience method for determining whether to use the
explicit or measured height
| UIComponent | |
|
A convenience method for determining whether to use the
explicit or measured width
| UIComponent | |
|
Gets the object that currently has focus. | UIComponent | |
|
Returns the element's layout height. | UIComponent | |
|
Returns the element's layout width. | UIComponent | |
|
Returns the x coordinate that the element uses to draw on screen. | UIComponent | |
|
Returns the y coordinate that the element uses to draw on screen. | UIComponent | |
|
Returns the transform matrix that is used to calculate the component's
layout relative to its siblings. | UIComponent | |
|
Returns the layout transform Matrix3D for this element. | UIComponent | |
|
Returns the element's maximum height. | UIComponent | |
|
Returns the element's maximum width. | UIComponent | |
|
Returns the element's minimum height. | UIComponent | |
|
Returns the element's minimum width. | UIComponent | |
|
Restituisce un array di oggetti che si trovano sotto il punto specificato e sono elementi secondari (di uno o più livelli inferiori) di questa istanza DisplayObjectContainer. | DisplayObjectContainer | |
|
Returns the element's preferred height. | UIComponent | |
|
Returns the element's preferred width. | UIComponent | |
|
Restituisce un rettangolo che definisce i bordi dell'oggetto di visualizzazione in base al sistema di coordinate definito dal parametro targetCoordinateSpace, esclusi gli eventuali tratti presenti sulle forme. | DisplayObject | |
|
Returns the item in the dataProvider that was used
by the specified Repeater to produce this Repeater, or
null if this Repeater isn't repeated. | UIComponent | |
|
Gets a style property that has been set anywhere in this
component's style lookup chain. | UIComponent | |
| [override]
Converts a Point object from global to content coordinates. | Container | |
|
Converte le coordinate dello stage (globali) in quelle (locali) dell'oggetto di visualizzazione per l'oggetto Point. | DisplayObject | |
|
Converte un punto bidimensionale dalle coordinate dello stage (globali) in quelle (locali) di un oggetto di visualizzazione tridimensionale. | DisplayObject | |
|
Returns true if currentCSSState is not null. | UIComponent | |
|
Verifica se per l'oggetto EventDispatcher sono presenti listener registrati per un tipo specifico di evento. | EventDispatcher | |
|
Indica se per un oggetto è definita una proprietà specifica. | Object | |
|
Determines whether the specified state has been defined on this
UIComponent. | UIComponent | |
|
Valuta il riquadro di delimitazione dell'oggetto di visualizzazione per verificare se si sovrappone o si interseca con il riquadro di delimitazione dell'oggetto di visualizzazione obj. | DisplayObject | |
|
Valuta l'oggetto di visualizzazione per stabilire se si sovrappone o si interseca con il punto specificato dai parametri x e y. | DisplayObject | |
|
Returns a box Matrix which can be passed to the
drawRoundRect() method
as the rot parameter when drawing a horizontal gradient. | UIComponent | |
|
Initializes the internal structure of this component. | UIComponent | |
|
Initializes various properties which keep track of repeated instances
of this component. | UIComponent | |
|
Marks a component so that its updateDisplayList()
method gets called during a later screen update. | UIComponent | |
|
Called by a component's items to indicate that their depth
property has changed. | UIComponent | |
|
An element must call this method when its layoutDirection changes or
when its parent's layoutDirection changes. | UIComponent | |
|
Marks a component so that its commitProperties()
method gets called during a later screen update. | UIComponent | |
|
Marks a component so that its measure()
method gets called during a later screen update. | UIComponent | |
|
Indica se un'istanza della classe Object si trova nella catena di prototipi dell'oggetto specificato come parametro. | Object | |
|
Converte un punto tridimensionale delle coordinate (locali) dell'oggetto di visualizzazione tridimensionale in un punto bidimensionale nelle coordinate dello stage (globali). | DisplayObject | |
| [override]
Converts a Point object from local to content coordinates. | Container | |
|
Converte le coordinate dell'oggetto di visualizzazione (locali) in quelle dello stage (globali) per l'oggetto Point. | DisplayObject | |
|
Returns true if cssState matches currentCSSState. | UIComponent | |
|
Determines whether this instance is the same as, or is a subclass of,
the given type. | UIComponent | |
|
Measures the specified HTML text, which can contain HTML tags such
as <font> and <b>,
assuming that it is displayed
in a single-line UITextField using a UITextFormat
determined by the styles of this UIComponent. | UIComponent | |
|
Measures the specified text, assuming that it is displayed
in a single-line UITextField (or UIFTETextField) using a UITextFormat
determined by the styles of this UIComponent. | UIComponent | |
|
Moves the component to a specified position within its parent. | UIComponent | |
|
Propagates style changes to the children. | UIComponent | |
|
Returns true if the chain of owner properties
points from child to this UIComponent. | UIComponent | |
|
Called by Flex when a UIComponent object is added to or removed from a parent. | UIComponent | |
|
Prepares an IFlexDisplayObject for printing. | UIComponent | |
|
Indica se la proprietà specificata esiste ed è enumerabile. | Object | |
|
Builds or rebuilds the CSS style cache for this component
and, if the recursive parameter is true,
for all descendants of this component as well. | UIComponent | |
|
For each effect event, registers the EffectManager
as one of the event listeners. | UIComponent | |
|
Removes all children from the child list of this container. | Container | |
|
Removes all visual elements from the container. | Container | |
| [override]
Removes a child DisplayObject from the child list of this Container. | Container | |
| [override]
Removes a child DisplayObject from the child list of this Container
at the specified index. | Container | |
|
Rimuove tutte le istanze DisplayObject secondarie dall'elenco degli elementi secondari dell'istanza DisplayObjectContainer. | DisplayObjectContainer | |
|
Removes the specified visual element from the child list of
this container. | Container | |
|
Removes a visual element from the specified index position
in the container. | Container | |
|
Rimuove un listener dall'oggetto EventDispatcher. | EventDispatcher | |
|
Removes a non-visual style client from this component instance. | UIComponent | |
|
Replays the specified event. | UIComponent | |
|
Alza una tastiera virtuale. | InteractiveObject | |
|
Resolves a child by using the id provided. | UIComponent | |
| [statico]
Resumes the background processing of methods
queued by callLater(), after a call to
suspendBackgroundProcessing(). | UIComponent | |
|
Sizes the object. | UIComponent | |
| [override]
Sets the index of a particular child. | Container | |
|
Sets a layout constraint value, which is the same as
setting the constraint style for this component. | UIComponent | |
|
Set the current state. | UIComponent | |
|
Changes the position of an existing visual element in the visual container. | Container | |
|
Sets the focus to this component. | UIComponent | |
|
Sets the coordinates that the element uses to draw on screen. | UIComponent | |
|
Sets the layout size of the element. | UIComponent | |
|
Sets the transform Matrix that is used to calculate the component's layout
size and position relative to its siblings. | UIComponent | |
|
Sets the transform Matrix3D that is used to calculate the component's layout
size and position relative to its siblings. | UIComponent | |
|
Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche. | Object | |
|
Sets a style property on this component instance. | UIComponent | |
|
Called when the visible property changes. | UIComponent | |
|
Consente all'utente di trascinare lo sprite specificato. | Sprite | |
|
Consente all'utente di trascinare lo sprite specificato su un dispositivo abilitato per il tocco. | Sprite | |
|
Interrompe in modo ricorsivo l’esecuzione della linea temporale di qualsiasi MovieClips che ha origine in questo oggetto. | DisplayObjectContainer | |
|
Termina il metodo startDrag(). | Sprite | |
|
Termina il metodo startTouchDrag(), utilizzato con i dispositivi abilitati per il tocco. | Sprite | |
|
Detects changes to style properties. | UIComponent | |
|
Flex calls the stylesInitialized() method when
the styles for a component are first initialized. | UIComponent | |
| [statico]
Blocks the background processing of methods
queued by callLater(),
until resumeBackgroundProcessing() is called. | UIComponent | |
|
Scambia lo z-order (ordine di profondità) degli oggetti secondari specificati. | DisplayObjectContainer | |
|
Scambia lo z-order (ordine di profondità) degli oggetti secondari nelle due posizioni di indice specificate nell'elenco degli elementi secondari. | DisplayObjectContainer | |
|
Swaps the index of the two specified visual elements. | Container | |
|
Swaps the visual elements at the two specified index
positions in the container. | Container | |
|
Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate. | Object | |
| [override]
Returns a string indicating the location of this object
within the hierarchy of DisplayObjects in the Application. | FlexSprite | |
| 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. | UIComponent | |
|
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. | UIComponent | |
|
Validates the position and size of children and draws other
visuals. | UIComponent | |
|
Validate and update the properties and layout of this object
and redraw it, if necessary. | UIComponent | |
|
Used by layout logic to validate the properties of a component
by calling the commitProperties() method. | UIComponent | |
|
Validates the measured size of the component
If the LayoutManager.invalidateSize() method is called with
this ILayoutManagerClient, then the validateSize() method
is called when it's time to do measurements. | UIComponent | |
|
Handles both the valid and invalid events from a
validator assigned to this component. | UIComponent | |
|
Restituisce il valore di base dell'oggetto specificato. | Object | |
|
Returns a box Matrix which can be passed to drawRoundRect()
as the rot parameter when drawing a vertical gradient. | UIComponent | |
|
Verifica se un listener di eventi è registrato con questo oggetto EventDispatcher o qualsiasi suo antenato per il tipo di evento specificato. | EventDispatcher | |
Metodi protetti
| Metodo | Definito da | ||
|---|---|---|---|
|
Adjust the focus rectangle. | UIComponent | |
|
Commits the computed matrix built from the combination of the layout
matrix and the transform offsets to the flash displayObject's transform. | UIComponent | |
| [override]
Used internally by the Dissolve Effect to add the overlay to the chrome of a container. | Container | |
|
Determines if the call to the measure() method can be skipped. | UIComponent | |
|
Performs any final processing after child objects are created. | UIComponent | |
|
Processes the properties set on the component. | UIComponent | |
|
Creates the container's border skin
if it is needed and does not already exist. | Container | |
|
Create child objects of the component. | UIComponent | |
|
Creates a new object using a context
based on the embedded font being used. | UIComponent | |
|
Creates the object using a given moduleFactory. | UIComponent | |
|
Helper method for dispatching a PropertyChangeEvent
when a property is updated. | UIComponent | |
|
The event handler called when a UIComponent object gets focus. | UIComponent | |
|
The event handler called when a UIComponent object loses focus. | UIComponent | |
|
Initializes the implementation and storage of some of the less frequently
used advanced layout features of a component. | UIComponent | |
|
Finalizes the initialization of this component. | UIComponent | |
|
Initializes this component's accessibility code. | UIComponent | |
|
Helper method to invalidate parent size and display list if
this object affects its layout (includeInLayout is true). | UIComponent | |
|
Typically overridden by components containing UITextField objects,
where the UITextField object gets focus. | UIComponent | |
|
The event handler called for a keyDown event. | UIComponent | |
|
The event handler called for a keyUp event. | UIComponent | |
|
Respond to size changes by setting the positions and sizes
of this container's borders. | Container | |
[override]
Calculates the preferred minimum and preferred maximum sizes
of the Canvas. | Canvas | ||
|
This method is called when a UIComponent is constructed,
and again whenever the ResourceManager dispatches
a "change" Event to indicate
that the localized resources have changed in some way. | UIComponent | |
|
Positions the container's content area relative to the viewable area
based on the horizontalScrollPosition and verticalScrollPosition properties. | Container | |
|
Specifies a transform stretch factor in the horizontal and vertical direction. | UIComponent | |
|
This method is called when a state changes to check whether
state-specific styles apply to this component. | UIComponent | |
[override]
Sets the size of each child of the container. | Canvas | ||
Eventi
Stili
Gli stili sono di tipo comune oppure associati a un tema specifico. Se lo stile è comune, può essere utilizzato con qualunque tema. Se è associato a un tema specifico, può essere utilizzato solo se la vostra applicazione ne fa uso.
Stili comuni
Stili tema Spark
Stili tema Halo
Effetti
Costanti pubbliche
Descrizione delle proprietà
constraintColumns | proprietà |
constraintColumns:Array| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
An Array of ConstraintColumn instances that partition this container. The ConstraintColumn instance at index 0 is the left-most column; indices increase from left to right.
Implementazione
public function get constraintColumns():Array public function set constraintColumns(value:Array):voidconstraintRows | proprietà |
constraintRows:Array| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
An Array of ConstraintRow instances that partition this container. The ConstraintRow instance at index 0 is the top-most row; indices increase from top to bottom.
Implementazione
public function get constraintRows():Array public function set constraintRows(value:Array):voidDescrizione della funzione di costruzione
Canvas | () | Funzione di costruzione |
public function Canvas()| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Constructor.
Descrizione dei metodi
measure | () | metodo |
override protected function measure():void| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Calculates the preferred minimum and preferred maximum sizes of the Canvas.
The measuredWidth of the Canvas is just large enough
to display all of its children at their preferred widths
without clipping them.
This measure() method calculates the position of the
right-most child, calculates the position of that child's right edge,
and then adds room for the thickness of the Canvas container's border
and the right padding.
The measuredHeight is calculated similarly.
The Canvas container's minWidth and
minHeight properties are not calculated,
so Flex uses a default value of 0.
The Canvas container's maxWidth and
maxHeight properties are not calculated.
The container is assumed to have an infinite maximum
width and height.
All of the values described previously are the measured widths and heights of Canvas. The user can override the measured values by calling the explicitly supplying a value for the following properties:
widthheightminWidthminHeightmaxWidthmaxHeight
You should not call this method directly. The Flex LayoutManager calls it at the appropriate time. At application startup, the Flex LayoutManager attempts to measure all components from the children to the parents before setting them to their final sizes.
This is an advanced method for use in subclassing.
If you override this method, your implementation must either
call the super.measure() method or set the
measuredHeight and
measuredWidth properties.
You may also optionally set the following properties:
measuredMinWidthmeasuredMinHeight
updateDisplayList | () | metodo |
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 3 |
| Versioni runtime: | Flash Player 9, AIR 1.1 |
Sets the size of each child of the container.
Canvas does not change the positions of its children.
Each child is positioned according to the values of its
x and y properties.
Canvas does set each child's width and height to be equal
to that child's measuredWidth and
measuredHeight if no width
and height values are supplied.
The child can also be made resizable by setting
width and/or height to a percent value.
Resizable children are bound by the right and bottom edges
of the Canvas container.
In this case, the child's minWidth,
minHeight, maxWidth, and
maxHeight values are honored.
You should not call this method directly.
The Flex LayoutManager calls it at the appropriate time.
At application startup, the Flex LayoutManager calls
updateDisplayList() method on every component,
starting with the Application object and working downward.
This is an advanced method for use in subclassing.
If you override this method, your implementation should call the
super.updateDisplayList() method and call the
move() and setActualSize() methods
on each of the children.
For the purposes of performing layout, you should get the size
of this container from the unscaledWidth and
unscaledHeight properties, not the width
and height properties.
The width and height properties
do not take into account the value of the scaleX
and scaleY properties for this container.
Parametri
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.
|
SimpleCanvasExample.mxml
<?xml version="1.0"?>
<!-- Simple example to demonstrate the Halo Canvas layout container. -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx">
<s:Panel title="Canvas Container Example"
width="75%" height="75%"
horizontalCenter="0" verticalCenter="0">
<s:VGroup left="10" right="10" top="10" bottom="10">
<s:Label width="100%" color="blue"
text="Use absolute positioning to place the children of a Canvas container." />
<mx:Canvas borderStyle="solid" height="200" width="100%">
<!-- Stagger the position of the TextInput controls using absolute positioning.-->
<s:TextInput width="100" x="50" y="5"/>
<s:TextInput width="100" x="100" y="30"/>
<s:TextInput width="100" x="150" y="55"/>
<!-- Overlap the VBox containers using layout constraints.-->
<mx:VBox right="115" bottom="50" width="75" height="75" backgroundColor="#0080C0" />
<mx:VBox right="70" bottom="30" width="75" height="75" backgroundColor="#FFFF80" />
<mx:VBox right="25" bottom="10" width="75" height="75" backgroundColor="#8080C0" alpha="0.8" />
<s:RichEditableText right="25" y="110"
text="The Canvas container lets you place components on top of each other."
editable="false" />
</mx:Canvas>
</s:VGroup>
</s:Panel>
</s:Application>
Tue Jun 12 2018, 02:44 PM Z