DefaultDataDescriptor

Pakiet	mx.controls.treeClasses
Klasa	public class DefaultDataDescriptor
Dziedziczenie	DefaultDataDescriptor Object
Implementuje	ITreeDataDescriptor2, IMenuDataDescriptor

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

The DefaultDataDescriptor class provides a default implementation for accessing and manipulating data for use in controls such as Tree and Menu. This implementation handles e4x XML and object nodes in similar but different ways. See each method description for details on how the method accesses values in nodes of various types. This class is the default value of the Tree, Menu, MenuBar, and PopUpMenuButton control dataDescriptor properties.

Powiązane elementy interfejsu API

mx.controls.treeClasses.ITreeDataDescriptor
mx.controls.menuClasses.IMenuDataDescriptor
mx.controls.Menu
mx.controls.MenuBar
mx.controls.PopUpMenuButton
mx.controls.Tree

Właściwości publiczne

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	Właściwość		Zdefiniowane przez
		constructor : Object Odwołanie do obiektu klasy lub funkcji konstruktora, dotyczące danej instancji obiektu.	Object

Metody publiczne

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	Metoda		Zdefiniowane przez
		DefaultDataDescriptor() Constructor.	DefaultDataDescriptor
		addChildAt(parent:Object, newChild:Object, index:int, model:Object = null):Boolean Add a child node to a node at the specified index.	DefaultDataDescriptor
		getChildren(node:Object, model:Object = null):ICollectionView Provides access to a node's children.	DefaultDataDescriptor
		getData(node:Object, model:Object = null):Object Returns a node's data.	DefaultDataDescriptor
		getGroupName(node:Object):String Returns the name of the radio button group to which the node belongs, if any.	DefaultDataDescriptor
		getHierarchicalCollectionAdaptor(hierarchicalData:ICollectionView, uidFunction:Function, openItems:Object, model:Object = null):ICollectionView Returns an ICollectionView instance that makes the hierarchical data appear as if it was a linear ICollectionView instance.	DefaultDataDescriptor
		getNodeDepth(node:Object, iterator:IViewCursor, model:Object = null):int Returns the depth of the node, meaning the number of ancestors it has.	DefaultDataDescriptor
		getParent(node:Object, collection:ICollectionView, model:Object = null):Object Returns the parent of the node The parent of a top-level node is null.	DefaultDataDescriptor
		getType(node:Object):String Returns the type identifier of a node.	DefaultDataDescriptor
		hasChildren(node:Object, model:Object = null):Boolean Determines if the node actually has children.	DefaultDataDescriptor
		hasOwnProperty(name:String):Boolean Wskazuje, czy dla obiektu zdefiniowano określoną właściwość.	Object
		isBranch(node:Object, model:Object = null):Boolean Tests a node for termination.	DefaultDataDescriptor
		isEnabled(node:Object):Boolean Returns whether the node is enabled.	DefaultDataDescriptor
		isPrototypeOf(theClass:Object):Boolean Wskazuje, czy instancja klasy Object należy do łańcucha prototypów obiektu określonego jako parametr.	Object
		isToggled(node:Object):Boolean Returns whether the node is toggled.	DefaultDataDescriptor
		propertyIsEnumerable(name:String):Boolean Wskazuje, czy określona właściwość istnieje i jest przeliczalna.	Object
		removeChildAt(parent:Object, child:Object, index:int, model:Object = null):Boolean Removes the child node from a node at the specified index.	DefaultDataDescriptor
		setEnabled(node:Object, value:Boolean):void Sets the value of the field or attribute in the data provider that identifies whether the node is enabled.	DefaultDataDescriptor
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Ustawia dostępność właściwości dynamicznej używanej w pętlach.	Object
		setToggled(node:Object, value:Boolean):void Sets the value of the field or attribute in the data provider that identifies whether the node is toggled.	DefaultDataDescriptor
		toLocaleString():String Zwraca ciąg reprezentujący obiekt — sformatowany zgodnie z konwencjami właściwymi dla ustawień regionalnych.	Object
		toString():String Zwraca ciąg reprezentujący określony obiekt.	Object
		valueOf():Object Zwraca pierwotną wartość dla określonego obiektu.	Object

Konstruktor Szczegół

()

Konstruktor

public function DefaultDataDescriptor()

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Constructor.

Szczegół metody

addChildAt

()

metoda

public function addChildAt(parent:Object, newChild:Object, index:int, model:Object = null):Boolean

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Add a child node to a node at the specified index. This implementation does the following:

If the parent parameter is null or undefined, inserts the child parameter at the specified index in the collection specified by model parameter.
If the parent parameter has a children field or property, the method adds the child parameter to it at the index parameter location. In this case, the model parameter is not required.
If the parent parameter does not have a children field or property, the method adds the children property to the parent. The method then adds the child parameter to the parent at the index parameter location. In this case, the model parameter is not required.
If the index value is greater than the collection length or number of children in the parent, adds the object as the last child.

Parametry

	`parent:Object` — The node object that will parent the child.

	`newChild:Object` — The node object that will be parented by the node.

	`index:int` — The 0-based index of where to put the child node relative to the parent.

	`model:Object` (default = `null`) — The entire collection that this node is a part of.

Zwraca

Boolean — true if successful.

getChildren

()

metoda

public function getChildren(node:Object, model:Object = null):ICollectionView

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Provides access to a node's children. Returns a collection of children if they exist. If the node is an Object, the method returns the contents of the object's children field as an ArrayCollection. If the node is XML, the method returns an XMLListCollection containing the child elements.

Parametry

	`node:Object` — The node object currently being evaluated.

	`model:Object` (default = `null`) — The collection that contains the node; ignored by this class.

Zwraca

ICollectionView — An object containing the children nodes.

getData

()

metoda

public function getData(node:Object, model:Object = null):Object

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Returns a node's data. Currently returns the entire node.

Parametry

	`node:Object` — The node object currently being evaluated.

	`model:Object` (default = `null`) — The collection that contains the node; ignored by this class.

Zwraca

Object — The node.

getGroupName

()

metoda

public function getGroupName(node:Object):String

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Returns the name of the radio button group to which the node belongs, if any. This method is used by menu-based controls.

Parametry

node:Object — The node for which to get the group name.

Zwraca

String — The value of the node's groupName attribute or field, or an empty string if there is no such entry.

getHierarchicalCollectionAdaptor

()

metoda

 public function getHierarchicalCollectionAdaptor(hierarchicalData:ICollectionView, uidFunction:Function, openItems:Object, model:Object = null):ICollectionView

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Returns an ICollectionView instance that makes the hierarchical data appear as if it was a linear ICollectionView instance.

Parametry

	`hierarchicalData:ICollectionView` — The hierarchical data.

	`uidFunction:Function` — A function that takes an Object and returns the UID, as a String. This parameter is usually the `Tree.itemToUID()` method.

	`openItems:Object` — The items that have been opened or set opened.

	`model:Object` (default = `null`) — The collection to which this node belongs.

Zwraca

ICollectionView — An ICollectionView instance.

getNodeDepth

()

metoda

public function getNodeDepth(node:Object, iterator:IViewCursor, model:Object = null):int

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Returns the depth of the node, meaning the number of ancestors it has.

Parametry

	`node:Object` — The Object that defines the node.

	`iterator:IViewCursor` — An IViewCursor instance that could be used to do the calculation.

	`model:Object` (default = `null`) — The collection to which this node belongs.

Zwraca

int — The depth of the node, where 0 corresponds to the top level, and -1 if the depth cannot be calculated.

getParent

()

metoda

public function getParent(node:Object, collection:ICollectionView, model:Object = null):Object

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Returns the parent of the node The parent of a top-level node is null.

Parametry

	`node:Object` — The Object that defines the node.

	`collection:ICollectionView` — An ICollectionView instance that could be used to do the calculation.

	`model:Object` (default = `null`) — The collection to which this node belongs.

Zwraca

Object — The parent node containing the node as child, null for a top-level node, and undefined if the parent cannot be determined.

getType

()

metoda

public function getType(node:Object):String

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Returns the type identifier of a node. This method is used by menu-based controls to determine if the node represents a separator, radio button, a check box, or normal item.

Parametry

node:Object — The node object for which to get the type.

Zwraca

String — The value of the type attribute or field, or the empty string if there is no such field.

hasChildren

()

metoda

public function hasChildren(node:Object, model:Object = null):Boolean

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Determines if the node actually has children.

Parametry

	`node:Object` — The node object currently being evaluated.

	`model:Object` (default = `null`) — The collection that contains the node; ignored by this class.

Zwraca

Boolean — true if this node currently has children.

isBranch

()

metoda

public function isBranch(node:Object, model:Object = null):Boolean

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Tests a node for termination. Branches are non-terminating but are not required to have any leaf nodes. If the node is XML, returns true if the node has children or a true isBranch attribute. If the node is an object, returns true if the node has a (possibly empty) children field.

Parametry

	`node:Object` — The node object currently being evaluated.

	`model:Object` (default = `null`) — The collection that contains the node; ignored by this class.

Zwraca

Boolean — true if this node is non-terminating.

isEnabled

()

metoda

public function isEnabled(node:Object):Boolean

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Returns whether the node is enabled. This method is used by menu-based controls.

Parametry

node:Object — The node for which to get the status.

Zwraca

Boolean — The value of the node's enabled attribute or field, or true if there is no such entry or the value is not false.

isToggled

()

metoda

public function isToggled(node:Object):Boolean

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Returns whether the node is toggled. This method is used by menu-based controls.

Parametry

node:Object — The node for which to get the status.

Zwraca

Boolean — The value of the node's toggled attribute or field, or false if there is no such entry.

removeChildAt

()

metoda

public function removeChildAt(parent:Object, child:Object, index:int, model:Object = null):Boolean

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Removes the child node from a node at the specified index. If the parent parameter is null or undefined, the method uses the model parameter to access the child; otherwise, it uses the parent parameter and ignores the model parameter.

Parametry

	`parent:Object` — The node object that currently parents the child node.

	`child:Object` — The node that is being removed.

	`index:int` — The 0-based index of the child node to remove relative to the parent.

	`model:Object` (default = `null`) — The entire collection that this node is a part of.

Zwraca

Boolean — true if successful.

setEnabled

()

metoda

public function setEnabled(node:Object, value:Boolean):void

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Sets the value of the field or attribute in the data provider that identifies whether the node is enabled. This method sets the value of the node's enabled attribute or field. This method is used by menu-based controls.

Parametry

	`node:Object` — The node for which to set the status.

	`value:Boolean` — Whether the node is enabled.

setToggled

()

metoda

public function setToggled(node:Object, value:Boolean):void

Wersja języka:

ActionScript 3.0

Wersja produktu:

Flex 3

Wersje środowiska wykonawczego:

Flash Player 9, AIR 1.1

Sets the value of the field or attribute in the data provider that identifies whether the node is toggled. This method sets the value of the node's toggled attribute or field. This method is used by menu-based controls.

Parametry

	`node:Object` — The node for which to set the status.

	`value:Boolean` — Whether the node is toggled.

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DefaultDataDescriptor - AS3 Flex

Pakietyx

Elementy językowe

Dodatki

Pakiet mx.controls.treeClasses