| Pacchetto | spark.collections |
| Classe | public class SortField |
| Ereditarietà | SortField  AdvancedStyleClient EventDispatcher Object |
| Implementa | ISortField |
| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4.5 |
| Versioni runtime: | Flash Player 10.1, AIR 2.5 |
var col:ICollectionView = new ArrayCollection();
col.addItem({first:"Anders", last:"Dickerson"});
var sort:Sort = new Sort();
var sortfield:SortField = new SortField("first", true);
sortfield.setStyle("locale", "en-US");
sort.fields = [sortfield];
col.sort = sort;
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();
var sortfield:SortField = new SortField(null, true);
sortfield.setStyle("locale", "en-US");
sort.fields = [sortfield];
col.sort = sort;
The default comparison provided by the SortField class
provides correct language specific
sorting for strings. The language is selected by the setting the locale
style on an instance of the class in one of the following ways:
- By using the class in an MXML declaration and inheriting the locale from the document that contains the declaration. Example:
<fx:Declarations>
<s:SortField id="sf" />
</fx:Declarations>
<fx:Declarations>
<s:SortField id="sf_SimplifiedChinese" locale="zh-Hans-CN" />
</fx:Declarations>
setStyle method,
e.g. sf.setStyle("locale", "zh-Hans-CN")
UIComponent by calling the
UIComponent's addStyleClient() method.
Mostra sintassi MXML
Nascondi sintassi MXMLThe <s:SortField> tag has the following attributes:
<s:SortField Properties compareFunction="Internal compare function" descending="false" name="null" numeric="null" />
Elementi API correlati
| Proprietà | Definito da | ||
|---|---|---|---|
| arraySortOnOptions : int [sola lettura]
This helper property is used internally by the findItem()
and sort() methods. | SortField | ||
 | className : String [sola lettura]
The name of the component class. | AdvancedStyleClient | |
| compareFunction : Function
The function that compares two items during a sort of items for the
associated collection. | SortField | ||
| constructor : Object
Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto. | Object | |
| descending : Boolean
Specifies whether this field should be sorted in descending
order. | SortField | ||
| id : String
The identity of the component. | AdvancedStyleClient | |
| inheritingStyles : Object
An object containing the inheritable styles for this non-visual
style client instance. | AdvancedStyleClient | |
| moduleFactory : IFlexModuleFactory
A module factory is used as context for
finding the style manager that controls the styles for this
non-visual style client instance. | AdvancedStyleClient | |
| name : String
The name of the field to be sorted. | SortField | ||
| nonInheritingStyles : Object
The beginning of this component's chain of non-inheriting styles. | AdvancedStyleClient | |
| 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 | ||
| styleDeclaration : CSSStyleDeclaration
The style declaration that holds the inline styles declared by this
object. | AdvancedStyleClient | |
| styleManager : IStyleManager2 [sola lettura]
Returns the StyleManager instance used by this component. | AdvancedStyleClient | |
| styleName : Object
The source of this object's style values. | AdvancedStyleClient | |
| styleParent : IAdvancedStyleClient
A component's parent is used to evaluate descendant selectors. | AdvancedStyleClient | |
| usingCustomCompareFunction : Boolean [sola lettura]
True if this ISortField uses a custom comparator function. | SortField | ||
| Metodo | Definito da | ||
|---|---|---|---|
Constructor. | SortField | ||
| 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 | |
|
Deletes a style property from this component instance. | AdvancedStyleClient | |
|
Invia un evento nel flusso di eventi. | EventDispatcher | |
|
Returns an Array of CSSStyleDeclaration objects for the type selector
that applies to this component, or null if none exist. | AdvancedStyleClient | |
|
Gets a style property that has been set anywhere in this
component's style lookup chain. | AdvancedStyleClient | |
|
Returns true if currentCSSState is not null. | AdvancedStyleClient | |
|
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 | |
|
The initialized method is called when this class or a class that
extends this class is used in an MXML declaration. | AdvancedStyleClient | |
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 | ||
|
Indica se un'istanza della classe Object si trova nella catena di prototipi dell'oggetto specificato come parametro. | Object | |
|
Returns true if cssState matches currentCSSState. | AdvancedStyleClient | |
|
Determines whether this instance is the same as, or is a subclass of,
the given type. | AdvancedStyleClient | |
|
Propagates style changes to the children of this style client
instance. | AdvancedStyleClient | |
|
Indica se la proprietà specificata esiste ed è enumerabile. | Object | |
|
Sets up the internal style cache values so that the
getStyle()
method functions. | AdvancedStyleClient | |
|
Registers the EffectManager as one of the event listeners
for each effect event. | AdvancedStyleClient | |
|
Rimuove un listener dall'oggetto EventDispatcher. | EventDispatcher | |
Reverse the criteria for this sort field. | SortField | ||
|
Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche. | Object | |
|
Sets a style property on this component instance. | AdvancedStyleClient | |
|
Detects changes to style properties. | AdvancedStyleClient | |
|
Flex calls the stylesInitialized() method when
the styles for a component are first initialized. | AdvancedStyleClient | |
|
Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate. | Object | |
|
Restituisce la rappresentazione in formato stringa dell'oggetto specificato. | Object | |
|
Restituisce il valore di base dell'oggetto specificato. | Object | |
|
Verifica se un listener di eventi è registrato con questo oggetto EventDispatcher o qualsiasi suo antenato per il tipo di evento specificato. | EventDispatcher | |
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.
| Stile | Descrizione | Definito da | ||
|---|---|---|---|---|
locale | Tipo: String Ereditarietà CSS: Sì Versione linguaggio: ActionScript 3.0 Versione prodotto: Flex 4.5 Versioni runtime: Flash10.1, AIR 2.5 The locale identifier that specifies the language, region, script and optionally other related tags and keys. The syntax of this identifier must follow the syntax defined by the Unicode Technical Standard #35 (for example, en-US, de-DE, zh-Hans-CN). For browser based apps, the default locale is based on the language settings from the browser. (Note that this is not the browser UI language that is available from Javascript, but rather is the list of preferred locales for web pages that the user has set in the browser preferences.) For AIR applications, the default UI locale is based on the user's system preferences. Altre informazioni | SortField | ||
arraySortOnOptions | proprietà |
arraySortOnOptions:int [sola lettura] | Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4.5 |
| Versioni runtime: | Flash Player 10.1, AIR 2.5 |
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..
Implementazione
public function get arraySortOnOptions():intcompareFunction | proprietà |
compareFunction:Function| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4.5 |
| Versioni runtime: | Flash Player 10.1, AIR 2.5 |
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 the
Object ashould appear before theObject bin the sorted sequence - 0, if the
Object aequals theObject b - 1, if the
Object ashould appear after theObject bin 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.
The string comparison is performed using the locale (language,
region and script) specific comparison method from the
SortingCollator class.
This class uses the locale style to determine a locale
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.
Implementazione
public function get compareFunction():Function public function set compareFunction(value:Function):voiddescending | proprietà |
descending:Boolean| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4.5 |
| Versioni runtime: | Flash Player 10.1, AIR 2.5 |
Specifies whether this field should be sorted in descending order.
The default value is false (ascending).
Questa proprietà può essere utilizzata come origine per l’associazione di dati. Quando questa proprietà viene modificata, invia l’evento descendingChanged .
Implementazione
public function get descending():Boolean public function set descending(value:Boolean):voidname | proprietà |
name:String| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4.5 |
| Versioni runtime: | Flash Player 10.1, AIR 2.5 |
The name of the field to be sorted.
Il valore predefinito è null.
Questa proprietà può essere utilizzata come origine per l’associazione di dati. Quando questa proprietà viene modificata, invia l’evento nameChanged .
Implementazione
public function get name():String public function set name(value:String):voidnumeric | proprietà |
numeric:Object| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4.5 |
| Versioni runtime: | Flash Player 10.1, AIR 2.5 |
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.
Il valore predefinito è null.
Questa proprietà può essere utilizzata come origine per l’associazione di dati. Quando questa proprietà viene modificata, invia l’evento numericChanged .
Implementazione
public function get numeric():Object public function set numeric(value:Object):voidusingCustomCompareFunction | proprietà |
SortField | () | Funzione di costruzione |
public function SortField(name:String = null, descending:Boolean = false, numeric:Object = null)| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4.5 |
| Versioni runtime: | Flash Player 10.1, AIR 2.5 |
Constructor.
Parametriname:String (default = null)null.
| |
descending:Boolean (default = false) | |
numeric:Object (default = null) |
initializeDefaultCompareFunction | () | metodo |
public function initializeDefaultCompareFunction(obj:Object):void| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4.5 |
| Versioni runtime: | Flash Player 10.1, AIR 2.5 |
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.
Parametri
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 | () | metodo |
public function reverse():void| Versione linguaggio: | ActionScript 3.0 |
| Versione prodotto: | Flex 4.5 |
| Versioni runtime: | Flash Player 10.1, AIR 2.5 |
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.
<?xml version="1.0" encoding="utf-8"?>
<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"
minWidth="955" minHeight="600">
<!-- Sample program for spark.collections.Sort and SortField -->
<fx:Declarations>
<s:Sort id="sortbyLastName_FirstName">
<s:fields>
<s:SortField name="last"/>
<s:SortField name="first"/>
</s:fields>
</s:Sort>
<mx:ArrayCollection id="collection" sort="{sortbyLastName_FirstName}">
<mx:source>
<fx:Object first="Anders" last="Dickerson"/>
<fx:Object first="Eileen" last="Maccormick"/>
<fx:Object first="Aiden" last="MacCormick"/>
<fx:Object first="Steve" last="MacGregor"/>
</mx:source>
</mx:ArrayCollection>
</fx:Declarations>
<s:VGroup>
<s:VGroup>
<s:HGroup>
<s:Label text="Input Locale ID Name: "/>
<s:TextInput id="inputLocaleIDName"/>
<!--
Sets the locale style on the document UI component.
The SortField and Sort objects defined in the
fx:Declarations section will inherit this style.
-->
<s:Button click="{setStyle('locale', inputLocaleIDName.text);
collection.refresh()}" label="Apply"/>
</s:HGroup>
<s:Label text="Example: 'en-US', 'fr-FR', 'zh-CN', 'ar-SA'"/>
</s:VGroup>
<s:DataGrid dataProvider="{collection}" width="100%"
creationComplete="{collection.refresh()}">
<s:columns>
<s:ArrayList>
<s:GridColumn dataField="last"/>
<s:GridColumn dataField="first"/>
</s:ArrayList>
</s:columns>
</s:DataGrid>
</s:VGroup>
</s:Application>
<?xml version="1.0" encoding="utf-8"?>
<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"
minWidth="955" minHeight="600"
creationComplete="initApp()">
<!-- Sample program for spark.collections.Sort and SortField -->
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import spark.collections.*;
[Bindable]
private var collection:ArrayCollection = new ArrayCollection();
private function localeChange():void
{
// Sets the locale style on this application.
// The SortField objects will inherit this style.
setStyle('locale', inputLocaleIDName.text);
collection.refresh();
}
private function initApp() : void
{
// Add data to the collection.
collection.addItem({first:"Anders", last:"Dickerson"});
collection.addItem({first:"Steve", last:"Maccormick"});
collection.addItem({first:"Aiden", last:"MacCormick"});
collection.addItem({first:"Eileen", last:"MacGregor"});
// Create the Sort instance.
var sort:Sort = new Sort();
// Set the sort field; sort on the last name first, first name
// second.
var sortfieldLastName:SortField = new SortField("last",true);
var sortfieldFirstName:SortField = new SortField("first",true);
sort.fields = [sortfieldLastName, sortfieldFirstName];
// Add the sort field objects to this application's list of
// style clients. This will cause the sort field objects to
// inherit the locale style from this Application.
addStyleClient(sortfieldLastName);
addStyleClient(sortfieldFirstName);
// Assign the Sort object to the view.
collection.sort = sort;
// Apply the sort to the collection.
collection.refresh();
}
]]>
</fx:Script>
<s:VGroup>
<s:VGroup>
<s:HGroup>
<s:Label text="Input Locale ID Name: "/>
<s:TextInput id="inputLocaleIDName"/>
<s:Button click="localeChange()" label="Apply"/>
</s:HGroup>
<s:Label text="Example: 'en-US', 'fr-FR', 'zh-CN', 'ar-SA'"/>
</s:VGroup>
<s:DataGrid dataProvider="{collection}" width="100%"
creationComplete="{collection.refresh()}">
<s:columns>
<s:ArrayList>
<s:GridColumn dataField="last"/>
<s:GridColumn dataField="first"/>
</s:ArrayList>
</s:columns>
</s:DataGrid>
</s:VGroup>
</s:Application>
Tue Jun 12 2018, 02:44 PM Z