| Paket | spark.components |
| Klass | public class DropDownList |
| Arv | DropDownList  DropDownListBase List ListBase SkinnableDataContainer SkinnableContainerBase SkinnableComponent UIComponent FlexSprite Sprite DisplayObjectContainer InteractiveObject DisplayObject EventDispatcher Object |
| Underklasser | AXMDropDownList, AXMPopUp, AXMSplitActionButton |
| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
 | Because this component does not define a skin for the mobile theme, Adobe recommends that you not use it in a mobile application. Alternatively, you can define your own mobile skin for the component. For more information, see Basics of mobile skinning. |
The DropDownList control contains a drop-down list from which the user can select a single value. Its functionality is very similar to that of the SELECT form element in HTML.
The DropDownList control consists of the anchor button, prompt area, and drop-down-list, Use the anchor button to open and close the drop-down-list. The prompt area displays a prompt String, or the selected item in the drop-down-list.
When the drop-down list is open:
- Clicking the anchor button closes the drop-down list and commits the currently selected data item.
- Clicking outside of the drop-down list closes the drop-down list and commits the currently selected data item.
- Clicking on a data item selects that item and closes the drop-down list.
- If the
requireSelectionproperty isfalse, clicking on a data item while pressing the Control key deselects the item and closes the drop-down list.
Note: The Spark list-based controls (the Spark ListBase class and its subclasses
such as ButtonBar, ComboBox, DropDownList, List, and TabBar) do not support the BasicLayout class
as the value of the layout property.
Do not use BasicLayout with the Spark list-based controls.
To use this component in a list-based component, such as a List or DataGrid, create an item renderer. For information about creating an item renderer, see Custom Spark item renderers.
The DropDownList control has the following default characteristics:
| Characteristic | Description |
|---|---|
| Default size | 112 pixels wide and 21 pixels high |
| Minimum size | 112 pixels wide and 21 pixels high |
| Maximum size | 10000 pixels wide and 10000 pixels high |
| Default skin class | spark.skins.spark.DropDownListSkin |
Visa MXML-syntax
Dölj MXML-syntaxThe <s:DropDownList> tag inherits all of the tag
attributes of its superclass and adds the following tag attributes:
<s:DropDownList
Properties
prompt=""
typicalItem="null"
Events
closed="No default"
open="No default"
/>
MXML-standardegenskapdataProvider
Fler exempel
Relaterade API-element
Publika egenskaper
| Egenskap | Definieras med | ||
|---|---|---|---|
 | 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
Den aktuella hjälpmedelsimplementeringen (AccessibilityImplementation) för den här InteractiveObject-instansen. | InteractiveObject | |
| accessibilityName : String
A convenience accessor for the name property
in this UIComponent's accessibilityProperties object. | UIComponent | |
| accessibilityProperties : AccessibilityProperties
De nuvarande hjälpmedelsalternativen för det här visningsobjektet. | DisplayObject | |
| accessibilityShortcut : String
A convenience accessor for the shortcut property
in this UIComponent's accessibilityProperties object. | UIComponent | |
| activeEffects : Array [skrivskyddad]
The list of effects that are currently playing on the component,
as an Array of EffectInstance instances. | UIComponent | |
| alpha : Number
Anger det angivna objektets alfagenomskinlighetsvärde. | DisplayObject | |
| arrowKeysWrapFocus : Boolean
If true, using arrow keys to navigate within
the component wraps when it hits either end. | ListBase | |
| autoLayout : Boolean
If true, measurement and layout are done
when the position or size of a child is changed. | SkinnableDataContainer | |
| automationDelegate : Object
The delegate object that handles the automation-related functionality. | UIComponent | |
| automationEnabled : Boolean [skrivskyddad]
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 [skrivskyddad]
The owner of this component for automation purposes. | UIComponent | |
| automationParent : DisplayObjectContainer [skrivskyddad]
The parent of this component for automation purposes. | UIComponent | |
| automationTabularData : Object [skrivskyddad]
An implementation of the IAutomationTabularData interface, which
can be used to retrieve the data. | UIComponent | |
| automationValue : Array [skrivskyddad]
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 [skrivskyddad]
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 [åsidosätt] [skrivskyddad]
The y-coordinate of the baseline
of the first line of text of the component. | SkinnableComponent | |
| blendMode : String
Ett värde från klassen BlendMode som anger vilket blandningsläge som ska användas. | DisplayObject | |
| blendShader : Shader [lässkyddad]
Ställer in en skuggning som används för blandning av förgrund och bakgrund. | DisplayObject | |
| bottom : Object
For components, this layout constraint property is a
facade on top of the similarly-named style. | UIComponent | |
| buttonMode : Boolean
Anger knappläge för den här spriten. | Sprite | |
| cacheAsBitmap : Boolean
Om det är true, sparar Flash-miljöerna en intern bitmappsrepresentation av visningsobjektet i cache-minnet. | DisplayObject | |
| cacheAsBitmapMatrix : Matrix
Om detta inte är null definierar det här Matrix-objektet hur ett visningsobjekt återges när cacheAsBitmap har värdet true. | DisplayObject | |
| cacheHeuristic : Boolean [lässkyddad]
Used by Flex to suggest bitmap caching for the object. | UIComponent | |
| cachePolicy : String
Specifies the bitmap caching policy for this object. | UIComponent | |
| caretIndex : Number [skrivskyddad]
Item that is currently in focus. | ListBase | |
| className : String [skrivskyddad]
The name of this instance's class, such as "Button". | UIComponent | |
| constructor : Object
En referens till klassobjektet eller konstruktorfunktionen för en given objektinstans. | Object | |
| contentMouseX : Number [skrivskyddad]
Returns the x position of the mouse, in the content coordinate system. | UIComponent | |
| contentMouseY : Number [skrivskyddad]
Returns the y position of the mouse, in the content coordinate system. | UIComponent | |
| contextMenu : NativeMenu
Anger vilken snabbmeny som är associerad med det här objektet. | InteractiveObject | |
| currentState : String
The current view state of the component. | UIComponent | |
| cursorManager : ICursorManager [skrivskyddad]
Gets the CursorManager that controls the cursor for this component
and its peers. | UIComponent | |
| dataProvider : IList
The data provider for this DataGroup. | SkinnableDataContainer | |
| defaultButton : IFlexDisplayObject
The Button control designated as the default button for the container. | SkinnableContainerBase | |
| 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 [åsidosätt]
Specifies whether the UIComponent object receives doubleClick events. | UIComponent | |
| dropTarget : DisplayObject [skrivskyddad]
Anger det visningsobjekt som spriten dras över, eller som spriten släpptes på. | 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
En indexerad array som innehåller varje filterobjekt som är associerat med visningsobjektet. | 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
Anger om det här objektet visar en fokusram. | InteractiveObject | |
| graphics : Graphics [skrivskyddad]
Anger det Graphics-objekt som tillhör denna sprite där kommandon för vektorritning kan göras. | Sprite | |
| hasFocusableChildren : Boolean [åsidosätt]
A flag that indicates whether this List's focusable item renderers
can take keyboard focus. | List | |
| hasLayoutMatrix3D : Boolean [skrivskyddad]
Contains true if the element has 3D Matrix. | UIComponent | |
| height : Number [åsidosätt]
Number that specifies the height of the component, in pixels,
in the parent's coordinates. | UIComponent | |
| hitArea : Sprite
Utser en annan sprite som ska fungera som träffområde för en sprite. | Sprite | |
| horizontalCenter : Object
For components, this layout constraint property is a
facade on top of the similarly-named style. | UIComponent | |
| 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 [skrivskyddad]
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 [skrivskyddad]
Contains true when the element is in 3D. | UIComponent | |
| isDocument : Boolean [skrivskyddad]
Contains true if this UIComponent instance is a document object. | UIComponent | |
| isDropDownOpen : Boolean [skrivskyddad]
Contains true if the drop down is open. | DropDownListBase | |
| isPopUp : Boolean
Set to true by the PopUpManager to indicate
that component has been popped up. | UIComponent | |
| itemRenderer : IFactory
The item renderer to use for data items. | SkinnableDataContainer | |
| itemRendererFunction : Function
Function that returns an item renderer IFactory for a
specific item. | SkinnableDataContainer | |
| labelField : String
The name of the field in the data provider items to display
as the label. | ListBase | |
| labelFunction : Function
A user-supplied function to run on each item to determine its label. | ListBase | |
| layout : LayoutBase
The layout object for this container. | SkinnableDataContainer | |
| layoutMatrix3D : Matrix3D [lässkyddad]
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 [skrivskyddad]
Returnerar ett LoaderInfo-objekt som innehåller information om hur filen som visningsobjektet tillhör ska läsas in. | DisplayObject | |
| maintainProjectionCenter : Boolean
When true, the component keeps its projection matrix centered on the
middle of its bounding box. | UIComponent | |
| mask : DisplayObject
Det anropande visningsobjektet maskeras av det angivna visningsobjektet. | DisplayObject | |
| maxHeight : Number
The maximum recommended height of the component to be considered
by the parent during layout. | UIComponent | |
| 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
Erhåller metadataobjektet för instansen DisplayObject om metadata har lagrats tillsammans med instansen för detta DisplayObject i SWF-filen via en PlaceObject4-tagg. | 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
Avgör om objektets underordnade objekt är aktiverade för en mus eller annan användarindataenhet (eller inte). | DisplayObjectContainer | |
| mouseEnabled : Boolean
Anger om det här objektet tar emot musmeddelanden eller annan indata från användaren. | InteractiveObject | |
| mouseFocusEnabled : Boolean
Whether you can receive focus when clicked on. | UIComponent | |
| mouseX : Number [skrivskyddad]
Anger x-koordinaten för musens eller användarens indataenhets position i pixlar. | DisplayObject | |
| mouseY : Number [skrivskyddad]
Anger y-koordinaten för musens eller användarens indataenhets position i pixlar. | DisplayObject | |
| name : String
Anger instansnamnet för DisplayObject. | DisplayObject | |
| needsSoftKeyboard : Boolean
Anger om ett virtuellt tangentbord (t.ex. ett skärmtangentbord) ska visas när den här InteractiveObject-instansen är i fokus. | 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 [skrivskyddad]
The number of automation children this container has. | UIComponent | |
| opaqueBackground : Object
Anger om visningsobjektet är ogenomskinligt med en viss bakgrundsfärg. | DisplayObject | |
| owner : DisplayObjectContainer
The owner of this IVisualElement object. | UIComponent | |
| pageScrollingEnabled : Boolean
Whether page scrolling is currently enabled for this Scroller
| List | |
| parent : DisplayObjectContainer [åsidosätt] [skrivskyddad]
The parent container or component for this component. | UIComponent | |
| parentApplication : Object [skrivskyddad]
A reference to the Application object that contains this UIComponent
instance. | UIComponent | |
| parentDocument : Object [skrivskyddad]
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 | |
| prompt : String
The prompt for the DropDownList control. | DropDownList | ||
| repeater : IRepeater [skrivskyddad]
A reference to the Repeater object
in the parent document that produced this UIComponent. | UIComponent | |
| repeaterIndex : int [skrivskyddad]
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 | |
| requireSelection : Boolean
If true, a data item must always be selected in the control. | ListBase | |
| right : Object
For components, this layout constraint property is a
facade on top of the similarly-named style. | UIComponent | |
| root : DisplayObject [skrivskyddad]
För ett visningsobjekt i en inläst SWF-fil är rotegenskapen det översta visningsobjektet i den del av visningslistans trädstruktur som representeras av den SWF-filen. | DisplayObject | |
| rotation : Number [åsidosätt]
Anger DisplayObject-instansens rotation i grader från den ursprungliga orienteringen. | UIComponent | |
| rotationX : Number [åsidosätt]
Indicates the x-axis rotation of the DisplayObject instance, in degrees, from its original orientation
relative to the 3D parent container. | UIComponent | |
| rotationY : Number [åsidosätt]
Indicates the y-axis rotation of the DisplayObject instance, in degrees, from its original orientation
relative to the 3D parent container. | UIComponent | |
| rotationZ : Number [åsidosätt]
Indicates the z-axis rotation of the DisplayObject instance, in degrees, from its original orientation relative to the 3D parent container. | UIComponent | |
| scale9Grid : Rectangle
Det skalningsrutnät som används för närvarande. | DisplayObject | |
| scaleX : Number [åsidosätt]
Number that specifies the horizontal scaling factor. | UIComponent | |
| scaleY : Number [åsidosätt]
Number that specifies the vertical scaling factor. | UIComponent | |
| scaleZ : Number [åsidosätt]
Number that specifies the scaling factor along the z axis. | UIComponent | |
| screen : Rectangle [skrivskyddad]
Returns an object that contains the size and position of the base
drawing surface for this object. | UIComponent | |
| scrollRect : Rectangle
Visningsobjektets gränser för rullningsrektangeln. | DisplayObject | |
| scrollSnappingMode : String
The scroll snapping mode currently in effect for this Scroller
Changing this property to anything other than "none" may
result in an immediate change in scroll position to ensure
an element is correctly "snapped" into position. | List | |
| selectedIndex : int
The 0-based index of the selected item, or -1 if no item is selected. | ListBase | |
| selectedItem : *
The item that is currently selected. | ListBase | |
| showInAutomationHierarchy : Boolean
A flag that determines if an automation object
shows in the automation hierarchy. | UIComponent | |
| skin : UIComponent [skrivskyddad]
The instance of the skin class for this component instance. | SkinnableComponent | |
| softKeyboard : String
Kontrollerar utseendet på skärmtangentbordet. | InteractiveObject | |
| softKeyboardInputAreaOfInterest : Rectangle
Definierar det område som ska behållas på skärmen när skärmtangentbordet visas (ej tillgängligt på iOS). | InteractiveObject | |
| soundTransform : flash.media:SoundTransform
Styr ljudet i den här spriten. | Sprite | |
| stage : Stage [skrivskyddad]
Visningsobjektets scen. | 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 [skrivskyddad]
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 | |
| suggestedFocusSkinExclusions : Array [skrivskyddad]
Lists the skin parts that are
excluded from bitmaps captured and used to
show focus. | SkinnableComponent | |
| systemManager : ISystemManager
Returns the SystemManager object used by this component. | UIComponent | |
| tabChildren : Boolean
Avgör om objektets underordnade objekt är tabbaktiverade. | DisplayObjectContainer | |
| tabEnabled : Boolean
Anger om det här objektet inkluderas i tabbordningen. | 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
Anger tabbordningen för objekt i en SWF-fil. | InteractiveObject | |
| textSnapshot : flash.text:TextSnapshot [skrivskyddad]
Returnerar ett TextSnapshot-objekt för den här DisplayObjectContainer-instansen. | 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 [åsidosätt]
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 | |
| typicalItem : Object [åsidosätt]
Layouts use the preferred size of the typicalItem
when fixed row or column sizes are required, but a specific
rowHeight or columnWidth value is not set. | DropDownList | ||
| 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
Ett booleskt värde som anger om den pekande handen (handpekaren) ska visas när pekaren passerar över en sprite, vars buttonMode-egenskap är true. | Sprite | |
| useVirtualLayout : Boolean [åsidosätt]
Sets the value of the useVirtualLayout property
of the layout associated with this control. | List | |
| 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 | |
| visible : Boolean [åsidosätt]
Whether or not the display object is visible. | UIComponent | |
| width : Number [åsidosätt]
Number that specifies the width of the component, in pixels,
in the parent's coordinates. | UIComponent | |
| x : Number [åsidosätt]
Number that specifies the component's horizontal position,
in pixels, within its parent container. | UIComponent | |
| y : Number [åsidosätt]
Number that specifies the component's vertical position,
in pixels, within its parent container. | UIComponent | |
| z : Number [åsidosätt]
Indicates the z coordinate position along the z-axis of the DisplayObject
instance relative to the 3D parent container. | UIComponent | |
Skyddade egenskaper
Publika metoder
| Metod | Definieras med | ||
|---|---|---|---|
Constructor. | DropDownList | ||
|
Adds the selected items to the DragSource object as part of
a drag-and-drop operation. | List | |
| addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registrerar ett händelseavlyssnarobjekt för ett EventDispatcher-objekt så att avlyssnaren får meddelanden om händelser. | EventDispatcher | |
|
Adds a non-visual style client to this component instance. | UIComponent | |
|
Anger om säkerhetsrestriktionerna kan göra att visningsobjekt utelämnas från listan som returneras när metoden DisplayObjectContainer.getObjectsUnderPoint() anropas med den angivna punkten. | DisplayObjectContainer | |
|
Queues a function to be called later. | UIComponent | |
|
Deletes a style property from this component instance. | UIComponent | |
|
Close the drop-down list and dispatch a DropDownEvent.CLOSE event. | DropDownListBase | |
|
Avgör om det angivna visningsobjektet är underordnat DisplayObjectContainer-instansen eller själva instansen. | DisplayObjectContainer | |
|
Converts a Point object from content coordinates to global coordinates. | UIComponent | |
|
Converts a Point object from content to local coordinates. | UIComponent | |
|
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 | |
|
Creates an instance of a class that is used to display the visuals
of the dragged items during a drag and drop operation. | List | |
|
Creates and instance of the dropIndicator class that is used to
display the visuals of the drop location during a drag and drop
operation. | List | |
|
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 | |
|
Releases the dropIndicator instance that is currently set in the layout. | List | |
|
Returns a UITextFormat object corresponding to the text styles
for this UIComponent. | UIComponent | |
| [åsidosätt]
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 | |
|
A convenience method that handles scrolling a data item
into view. | List | |
|
Executes all the bindings for which the UIComponent object is the destination. | UIComponent | |
|
Called after printing is complete. | UIComponent | |
|
Provides the automation object at the specified index. | UIComponent | |
|
Provides the automation object list . | UIComponent | |
|
Returnerar en rektangel som definierar visningsområdets område i relation till targetCoordinateSpace-objektets koordinatsystem. | 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 | |
|
Returnerar det underordnade visningsobjektet som har ett visst namn. | DisplayObjectContainer | |
|
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 | |
|
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 | |
|
Returnerar en array med objekt som ligger under den angivna punkten och är underordnade (eller indirekt underordnade) den här DisplayObjectContainer-instansen. | DisplayObjectContainer | |
|
Returns the element's preferred height. | UIComponent | |
|
Returns the element's preferred width. | UIComponent | |
|
Returnerar en rektangel som definierar visningsområdets gräns, baserat på koordinatsystemet som definieras av targetCoordinateSpace-parametern, exklusive eventuella linjer i former. | 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 | |
|
Converts a Point object from global to content coordinates. | UIComponent | |
|
Konverterar punktobjektet från scenens (globala) koordinater till visningsobjektets (lokala) koordinater. | DisplayObject | |
|
Konverterar en tvådimensionell punkt från scenens (globala) koordinater till ett tredimensionellt visningsobjekts (lokala) koordinater. | DisplayObject | |
|
Returns true if currentCSSState is not null. | UIComponent | |
|
Kontrollerar om EventDispatcher-objektet har några avlyssnare registrerade för en viss typ av händelse. | EventDispatcher | |
|
Anger om det finns en egenskap angiven för ett objekt. | Object | |
|
Determines whether the specified state has been defined on this
UIComponent. | UIComponent | |
|
Utvärderar begränsningsramen för visningsobjektet för att kontrollera om den överlappar eller korsar begränsningsramen för obj-visningsobjektet. | DisplayObject | |
|
Utvärderar visningsobjektet för att avgöra om det överlappar eller korsar den punkt som anges av x- och y-parametrarna. | 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 | |
|
Marks the component so that the new state of the skin is set
during a later screen update. | SkinnableComponent | |
|
Anger om en instans av klassen Object finns i prototypkedjan för objektet som anges som parameter. | Object | |
| [åsidosätt]
Given a data item, return the correct text a renderer
should display while taking the labelField
and labelFunction properties into account. | ListBase | |
|
Konverterar en tredimensionell punkt för det tredimensionella visningsobjektets (lokala) koordinater till en tvådimensionell punkt i scenens (globala) koordinater. | DisplayObject | |
|
Converts a Point object from local to content coordinates. | UIComponent | |
|
Konverterar punktobjektet från visningsobjektets (lokala) koordinater till scenens (globala) koordinater. | 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 | |
|
Open the drop-down list and dispatch
a DropdownEvent.OPEN event. | DropDownListBase | |
|
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 | |
|
Anger om den angivna egenskapen finns och är uppräkningsbar. | 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 | |
|
Tar bort alla child-DisplayObject-instanser från listan med underordnade för DisplayObjectContainer-instansen. | DisplayObjectContainer | |
|
Tar bort en avlyssnare från EventDispatcher-objektet. | EventDispatcher | |
|
Removes a non-visual style client from this component instance. | UIComponent | |
|
Replays the specified event. | UIComponent | |
|
Visar ett virtuellt tangentbord. | InteractiveObject | |
|
Resolves a child by using the id provided. | UIComponent | |
| [statisk]
Resumes the background processing of methods
queued by callLater(), after a call to
suspendBackgroundProcessing(). | UIComponent | |
|
Sizes the object. | UIComponent | |
|
Sets a layout constraint value, which is the same as
setting the constraint style for this component. | UIComponent | |
|
Set the current state. | UIComponent | |
|
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 | |
|
Anger tillgänglighet för en dynamisk egenskap för slingåtgärder. | Object | |
|
Sets a style property on this component instance. | UIComponent | |
|
Called when the visible property changes. | UIComponent | |
|
Gör att användaren kan dra angiven sprite. | Sprite | |
|
Låter användaren dra angiven sprite på en beröringsaktiverad enhet. | Sprite | |
|
Stoppar rekursivt tidslinjekörning av alla filmklipp vars rot är detta objekt. | DisplayObjectContainer | |
|
Avslutar metoden startDrag(). | Sprite | |
|
Avslutar metoden startTouchDrag(), som används med beröringsaktiverade enheter. | Sprite | |
|
Detects changes to style properties. | UIComponent | |
|
Flex calls the stylesInitialized() method when
the styles for a component are first initialized. | UIComponent | |
| [statisk]
Blocks the background processing of methods
queued by callLater(),
until resumeBackgroundProcessing() is called. | UIComponent | |
|
Returnerar det här objektets strängrepresentation, formaterad i enlighet med språkspecifika konventioner. | Object | |
| [åsidosätt]
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 | |
|
Updates an item renderer for use or reuse. | SkinnableDataContainer | |
|
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 | |
|
Returnerar det angivna objektets primitiva värde. | Object | |
|
Returns a box Matrix which can be passed to drawRoundRect()
as the rot parameter when drawing a vertical gradient. | UIComponent | |
|
Kontrollerar om en händelseavlyssnare är registrerad för det här EventDispatcher-objektet eller något av dess överordnade objekt för den angivna händelsetypen. | EventDispatcher | |
Skyddade metoder
Format
Format är antingen allmänna eller kopplade till ett visst tema. Om formatet är allmänt kan det användas med alla teman. Om ett format är kopplat till ett visst tema kan det bara användas om programmet använder just det temat.
Vanliga format
Glittertema-format
Mobiltema-format
Skaldelar
Den här komponenten använder skal som består av skaldelar. Ställ inte in skaldelar direkt. Komponentens skal anger skaldelarna.
| Skaldel | Beskrivning | Definieras med | ||
|---|---|---|---|---|
| Obligatoriskt: false Deltyp: Statisk Språkversion: ActionScript 3.0 Produktversion: Flex 4 Körningsmiljöversioner: Flash10, AIR 1.5 An optional skin part that defines the DataGroup in the skin class where data items get pushed into, rendered, and laid out. | SkinnableDataContainer | ||
| Obligatoriskt: false Deltyp: Statisk Språkversion: ActionScript 3.0 Produktversion: Flex 4 Körningsmiljöversioner: Flash10, AIR 1.5 A skin part that defines the drop-down list area. When the DropDownListBase is open, clicking anywhere outside of the dropDown skin part closes the drop-down list. | DropDownListBase | ||
| Obligatoriskt: false Deltyp: Dynamisk Språkversion: ActionScript 3.0 Produktversion: Flex 4 Körningsmiljöversioner: Flash10, AIR 1.5 A skin part that defines the appearance of the drop indicator. The drop indicator is resized and positioned by the layout to outline the insert location when dragging over the List. By default, the drop indicator for a Spark control is a solid line that spans the width of the control. Create a custom drop indicator by creating a custom skin class for the drop target. In your skin class, create a skin part named dropIndicator, in the Typen IFactory måste returnera ett objekt av typen DisplayObject. | List | ||
labelDisplay:IDisplayText | Obligatoriskt: false Deltyp: Statisk Språkversion: ActionScript 3.0 Produktversion: Flex 4 Körningsmiljöversioner: Flash10, AIR 1.5 An optional skin part that holds the prompt or the text of the selected item. | DropDownList | ||
| Obligatoriskt: true Deltyp: Statisk Språkversion: ActionScript 3.0 Produktversion: Flex 4 Körningsmiljöversioner: Flash10, AIR 1.5 A skin part that defines the anchor button. | DropDownListBase | ||
| Obligatoriskt: false Deltyp: Statisk Språkversion: ActionScript 3.0 Produktversion: Flex 4 Körningsmiljöversioner: Flash10, AIR 1.5 The optional Scroller used to scroll the List. | List | ||
Skallägen
Implementera ett skal som definierar följande lägen om du vill använda ett skal för komponenten. Trots att alla skallägen måste implementeras kan ett skalläge vara tomt. Ett tomt skalläge innebär att inga ändringar görs i standardskalläget.
Publika konstanter
Egenskapsdetaljer
prompt | egenskap |
prompt:String| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
The prompt for the DropDownList control.
The prompt is a String that is displayed in the
DropDownList when selectedIndex = -1.
It is usually a String such as "Select one...".
Selecting an item in the drop-down list replaces the
prompt with the text from the selected item.
Standardvärdet är "".
Implementering
public function get prompt():String public function set prompt(value:String):voidtypicalItem | egenskap |
typicalItem:Object[åsidosätt] | Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
Layouts use the preferred size of the typicalItem
when fixed row or column sizes are required, but a specific
rowHeight or columnWidth value is not set.
Similarly virtual layouts use this item to define the size
of layout elements that have not been scrolled into view.
The container uses the typical data item, and the associated item renderer, to determine the default size of the container children. By defining the typical item, the container does not have to size each child as it is drawn on the screen.
Setting this property sets the typicalLayoutElement property
of the layout.
Restriction: if the typicalItem is an IVisualItem, it must not
also be a member of the data provider.
Note: Setting typicalItem overrides any explicit width or height
set on the labelDisplay skin part.
Standardvärdet är null.
Implementering
override public function get typicalItem():Object override public function set typicalItem(value:Object):voidKonstruktordetaljer
DropDownList | () | Konstruktor |
public function DropDownList()| Språkversion: | ActionScript 3.0 |
| Produktversion: | Flex 4 |
| Körningsmiljöversioner: | Flash Player 10, AIR 1.5 |
Constructor.
Exempel Så här använder du exemplet
DropDownListExample.mxml
<?xml version="1.0" encoding="utf-8"?>
<!-- Simple example to demonstrate the Spark DropDownList control -->
<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">
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import spark.events.IndexChangeEvent;
[Bindable]
public var myDP:ArrayCollection = new ArrayCollection(
[ {product:"Flex", price:100},
{product:"Air", price:200},
{product:"Catalyst", price:300},
{product:"FlashBuilder", price:400} ]);
private function updateSelection(e:IndexChangeEvent):void
{
currSel.text = "Current Product = " + myDDL.selectedItem.product;
currPrc.text = "Price = $" + myDDL.selectedItem.price;
}
]]>
</fx:Script>
<s:Panel width="75%" height="75%" title="My DropDownList Example"
horizontalCenter="0" verticalCenter="0">
<s:VGroup left="10" right="10" top="10" bottom="10">
<!-- Text components used to display current selection and price -->
<s:Label id="currSel" text="Current Product = -"/>
<s:Label id="currPrc" text="Price = $ -"/>
<!-- DropDownList will call the updateSelection function when the
selectionChanged event is dispatched -->
<s:DropDownList id="myDDL" prompt="Select One"
width="200" dataProvider="{myDP}"
labelField="product"
change="updateSelection(event);"/>
</s:VGroup>
</s:Panel>
</s:Application>
Tue Jun 12 2018, 01:40 PM Z