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mx.collections 

SortField  - AS3 Flex

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언어 요소

전역 상수
전역 함수
연산자
명령문, 키워드 및 지시문
특수 유형 연산자

부록

새로운 내용
컴파일러 오류
컴파일러 경고
런타임 오류
ActionScript 3으로 마이그레이션
지원되는 문자 세트
MXML 전용 태그
모션 XML 요소
Timed Text 태그
사용되지 않는 요소의 목록
액세스 가능성 구현 상수
ActionScript 예제 사용 방법
법적 고지 사항
패키지mx.collections
클래스public class SortField
상속SortField Inheritance EventDispatcher Inheritance Object
구현 ISortField

언어 버전: ActionScript 3.0
제품 버전: Flex 3
런타임 버전: Flash Player 9, AIR 1.1


Flex 4.5(으)로 시작하는 경우 이 클래스 대신 spark.collections.SortField 클래스를 사용하는 것이 좋습니다.

Provides the sorting information required to establish a sort on a field or property in a collection view. The SortField class is meant to be used with the Sort class. Typically the sort is defined for collections of complex items, that is items in which the sort is performed on properties of those objects. As in the following example:

     var col:ICollectionView = new ArrayCollection();
     col.addItem({first:"Anders", last:"Dickerson"});
     var sort:Sort = new Sort();
     sort.fields = [new SortField("first", true)];
     col.sort = sort;
  
There are situations in which the collection contains simple items, like String, Date, Boolean, etc. In this case, sorting should be applied to the simple type directly. When constructing a sort for this situation only a single sort field is required and should not have a name specified. For example:

     var col:ICollectionView = new ArrayCollection();
     col.addItem("California");
     col.addItem("Arizona");
     var sort:Sort = new Sort();
     sort.fields = [new SortField(null, true)];
     col.sort = sort;
  

By default the comparison provided by the SortField class does not provide correct language specific sorting for strings. For this type of sorting please see the spark.collections.Sort and spark.collections.SortField classes.

MXML 구문expandedMXML 구문 숨기기

The <mx:SortField> tag has the following attributes:

  <mx:SortField
  Properties
  caseInsensitive="false"
  compareFunction="Internal compare function"
  descending="false"
  name="null"
  numeric="null"
  />
  

관련 API 요소



공용 속성
 속성정의 주체
  arraySortOnOptions : int
[읽기 전용] This helper property is used internally by the findItem() and sort() methods.
SortField
  caseInsensitive : Boolean
Specifies whether the sort for this field should be case insensitive.
SortField
  compareFunction : Function
The function that compares two items during a sort of items for the associated collection.
SortField
 Inheritedconstructor : Object
지정된 객체 인스턴스의 클래스 객체 또는 생성자 함수에 대한 참조입니다.
Object
  descending : Boolean
Specifies whether this field should be sorted in descending order.
SortField
  name : String
The name of the field to be sorted.
SortField
  numeric : Object
Specifies that if the field being sorted contains numeric (number/int/uint) values, or string representations of numeric values, the comparator use a numeric comparison.
SortField
  usingCustomCompareFunction : Boolean
[읽기 전용] True if this ISortField uses a custom comparator function.
SortField
공용 메서드
 메서드정의 주체
  
SortField(name:String = null, caseInsensitive:Boolean = false, descending:Boolean = false, numeric:Object = null)
Constructor.
SortField
 Inherited
addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
리스너에서 이벤트 알림을 받을 수 있도록 EventDispatcher 객체에 이벤트 리스너 객체를 등록합니다.
EventDispatcher
 Inherited
이벤트를 이벤트 흐름으로 전달합니다.
EventDispatcher
 Inherited
EventDispatcher 객체에 특정 유형의 이벤트에 대한 리스너가 등록되어 있는지 여부를 확인합니다.
EventDispatcher
 Inherited
지정된 속성이 객체에 정의되어 있는지 여부를 나타냅니다.
Object
  
A helper function called by the Sort class to set the default comparison function to perform a comparison based on one of three things: whether or not a custom compare function has been set, the data type for the specified field or the the value of the numeric property.
SortField
 Inherited
Object 클래스의 인스턴스가 매개 변수로 지정된 객체의 프로토타입 체인에 있는지 여부를 나타냅니다.
Object
 Inherited
지정된 속성이 존재하고 열거 가능한지 여부를 나타냅니다.
Object
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
EventDispatcher 객체에서 리스너를 제거합니다.
EventDispatcher
  
Reverse the criteria for this sort field.
SortField
 Inherited
루프 작업에서 동적 속성을 사용할 수 있는지 여부를 설정합니다.
Object
 Inherited
로캘별 규칙에 따라 서식이 지정된 이 객체의 문자열 표현을 반환합니다.
Object
 Inherited
지정된 객체의 문자열 표현을 반환합니다.
Object
 Inherited
지정된 객체의 프리미티브 값을 반환합니다.
Object
 Inherited
이 EventDispatcher 객체 또는 조상 객체에 지정한 이벤트 유형에 대한 이벤트 리스너가 등록되어 있는지 여부를 확인합니다.
EventDispatcher
이벤트
 이벤트 요약 정의 주체
 Inherited[브로드캐스트 이벤트] Flash Player 또는 AIR 응용 프로그램이 운영 체제 포커스를 얻어 활성화될 때 전달됩니다.EventDispatcher
 Inherited[브로드캐스트 이벤트] Flash Player 또는 AIR 응용 프로그램이 운영 체제 포커스를 잃고 비활성화될 때 전달됩니다.EventDispatcher
속성 세부 정보

arraySortOnOptions

속성
arraySortOnOptions:int  [읽기 전용]

언어 버전: ActionScript 3.0
제품 버전: Flex 3
런타임 버전: Flash Player 9, AIR 1.1

This helper property is used internally by the findItem() and sort() methods. Other uses of this property are not supported. Returns -1 if this ISortField shouldn't be used by the Sort class to sort the field (there is no compareFunction or no name). Otherwise, returns a bitmask of sort options..



구현
    public function get arraySortOnOptions():int

caseInsensitive

속성 
caseInsensitive:Boolean

언어 버전: ActionScript 3.0
제품 버전: Flex 3
런타임 버전: Flash Player 9, AIR 1.1

Specifies whether the sort for this field should be case insensitive.

기본값: false.

이 속성은 데이터 바인딩에 대한 소스로 사용할 수 있습니다. 이 속성을 수정하면 caseInsensitiveChanged 이벤트를 전달합니다.



구현
    public function get caseInsensitive():Boolean
    public function set caseInsensitive(value:Boolean):void

compareFunction

속성 
compareFunction:Function

언어 버전: ActionScript 3.0
제품 버전: Flex 3
런타임 버전: Flash Player 9, AIR 1.1

The function that compares two items during a sort of items for the associated collection. If you specify a compareFunction property in an ISort object, Flex ignores any compareFunction properties of the ISort's SortField objects.

The compare function must have the following signature:

function myCompare(a:Object, b:Object):int

This function must return the following values:

  • -1, if a should appear before b in the sorted sequence
  • 0, if a equals b
  • 1, if a should appear after b in the sorted sequence

The default value is an internal compare function that can perform a string, numeric, or date comparison in ascending or descending order, with case-sensitive or case-insensitive string comparisons. Specify your own function only if you need a need a custom comparison algorithm. This is normally only the case if a calculated field is used in a display.

Note if you need, language specific sorting then consider using the spark.collections.SortField class.



구현
    public function get compareFunction():Function
    public function set compareFunction(value:Function):void

관련 API 요소

descending

속성 
descending:Boolean

언어 버전: ActionScript 3.0
제품 버전: Flex 3
런타임 버전: Flash Player 9, AIR 1.1

Specifies whether this field should be sorted in descending order.

The default value is false (ascending).

이 속성은 데이터 바인딩에 대한 소스로 사용할 수 있습니다. 이 속성을 수정하면 descendingChanged 이벤트를 전달합니다.



구현
    public function get descending():Boolean
    public function set descending(value:Boolean):void

name

속성 
name:String

언어 버전: ActionScript 3.0
제품 버전: Flex 3
런타임 버전: Flash Player 9, AIR 1.1

The name of the field to be sorted.

기본값: null.

이 속성은 데이터 바인딩에 대한 소스로 사용할 수 있습니다. 이 속성을 수정하면 nameChanged 이벤트를 전달합니다.



구현
    public function get name():String
    public function set name(value:String):void

numeric

속성 
numeric:Object

언어 버전: ActionScript 3.0
제품 버전: Flex 3
런타임 버전: Flash Player 9, AIR 1.1

Specifies that if the field being sorted contains numeric (number/int/uint) values, or string representations of numeric values, the comparator use a numeric comparison.

This property is used by SortField class in case custom compare function is not provided.

If this property is true, the built-in numeric compare function is used. Each of data items is cast to a Number() function before the comparison.

If this property is false, the built-in string compare function is used. Each of data items is cast to a String() function before the comparison.

If this property is null, the first data item is introspected to see if it is a number or string and the sort proceeds based on that introspection.

기본값: null.

이 속성은 데이터 바인딩에 대한 소스로 사용할 수 있습니다. 이 속성을 수정하면 numericChanged 이벤트를 전달합니다.



구현
    public function get numeric():Object
    public function set numeric(value:Object):void

usingCustomCompareFunction

속성 
usingCustomCompareFunction:Boolean  [읽기 전용]

언어 버전: ActionScript 3.0
제품 버전: Flex 3
런타임 버전: Flash Player 9, AIR 1.1

True if this ISortField uses a custom comparator function.



구현
    public function get usingCustomCompareFunction():Boolean
생성자 세부 정보

SortField

()생성자
public function SortField(name:String = null, caseInsensitive:Boolean = false, descending:Boolean = false, numeric:Object = null)

언어 버전: ActionScript 3.0
제품 버전: Flex 3
런타임 버전: Flash Player 9, AIR 1.1

Constructor.

매개 변수
name:String (default = null) — The name of the property that this field uses for comparison. If the object is a simple type, pass null.
 
caseInsensitive:Boolean (default = false) — When sorting strings, tells the comparator whether to ignore the case of the values.
 
descending:Boolean (default = false) — Tells the comparator whether to arrange items in descending order.
 
numeric:Object (default = null) — Tells the comparator whether to compare sort items as numbers, instead of alphabetically.
메서드 세부 정보

initializeDefaultCompareFunction

()메서드
public function initializeDefaultCompareFunction(obj:Object):void

언어 버전: ActionScript 3.0
제품 버전: Flex 3
런타임 버전: Flash Player 9, AIR 1.1

A helper function called by the Sort class to set the default comparison function to perform a comparison based on one of three things: whether or not a custom compare function has been set, the data type for the specified field or the the value of the numeric property. If the the numeric property is true, then a numeric comparison will be performed when sorting.

매개 변수

obj:Object — The object that contains the data. If the field name has been set with the name property, then the name will be used to access the data value from this object. Otherwise the object itself will be used as the data value.

reverse

()메서드 
public function reverse():void

언어 버전: ActionScript 3.0
제품 버전: Flex 3
런타임 버전: Flash Player 9, AIR 1.1

Reverse the criteria for this sort field. If the field was sorted in descending order, for example, sort it in ascending order.

NOTE: An ICollectionView does not automatically update when the ISortFields are modified; call its refresh() method to update the view.





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