Pacchetto | mx.events |
Classe | public class ListEvent |
Ereditarietà | ListEvent Event Object |
Sottoclassi | MenuEvent |
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
Elementi API correlati
Proprietà | Definito da | ||
---|---|---|---|
bubbles : Boolean [sola lettura]
Indica se un evento è un evento di bubbling. | Event | ||
cancelable : Boolean [sola lettura]
Indica se il comportamento associato all'evento può essere impedito. | Event | ||
columnIndex : int
The zero-based index of the column that contains
the item renderer where the event occurred. | ListEvent | ||
constructor : Object
Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto. | Object | ||
currentTarget : Object [sola lettura]
L'oggetto che elabora attivamente l'oggetto Event con un listener di eventi. | Event | ||
eventPhase : uint [sola lettura]
La fase attuale del flusso di eventi. | Event | ||
itemRenderer : IListItemRenderer
The item renderer where the event occurred. | ListEvent | ||
reason : String
The reason the itemEditEnd event was dispatched. | ListEvent | ||
rowIndex : int
In the zero-based index of the row that contains
the item renderer where the event occured, or for editing events,
the index of the item in the data provider that is being edited. | ListEvent | ||
target : Object [sola lettura]
Il target dell'evento. | Event | ||
type : String [sola lettura]
Il tipo di evento. | Event |
Metodo | Definito da | ||
---|---|---|---|
ListEvent(type:String, bubbles:Boolean = false, cancelable:Boolean = false, columnIndex:int = -1, rowIndex:int = -1, reason:String = null, itemRenderer:IListItemRenderer = null)
Constructor. | ListEvent | ||
Duplica un'istanza di una sottoclasse Event. | Event | ||
Una funzione dell'utilità per l'implementazione del metodo toString() in classi Event ActionScript 3.0 personalizzate. | Event | ||
Indica se per un oggetto è definita una proprietà specifica. | Object | ||
Verifica se sull'evento è stato chiamato il metodo preventDefault(). | Event | ||
Indica se un'istanza della classe Object si trova nella catena di prototipi dell'oggetto specificato come parametro. | Object | ||
Annulla il comportamento predefinito di un evento se tale comportamento può essere annullato. | Event | ||
Indica se la proprietà specificata esiste ed è enumerabile. | Object | ||
Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche. | Object | ||
Impedisce l'elaborazione di tutti i listener di eventi nel nodo corrente e in tutti i nodi successivi del flusso di eventi. | Event | ||
Impedisce l'elaborazione di tutti i listener di eventi nei nodi del flusso di eventi successivi a quello corrente. | Event | ||
Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate. | Object | ||
Restituisce una stringa che contiene tutte le proprietà dell'oggetto Event. | Event | ||
Restituisce il valore di base dell'oggetto specificato. | Object |
Costante | Definito da | ||
---|---|---|---|
CHANGE : String = "change" [statico]
The ListEvent.CHANGE constant defines the value of the
type property of the ListEvent object for a
change event, which indicates that selection
changed as a result of user interaction. | ListEvent | ||
ITEM_CLICK : String = "itemClick" [statico]
The ListEvent.ITEM_CLICK constant defines the value of the
type property of the ListEvent object for an
itemClick event, which indicates that the
user clicked the mouse over a visual item in the control. | ListEvent | ||
ITEM_DOUBLE_CLICK : String = "itemDoubleClick" [statico]
The ListEvent.ITEM_DOUBLE_CLICK constant defines the value of the
type property of the ListEvent object for an
itemDoubleClick event, which indicates that the
user double clicked the mouse over a visual item in the control. | ListEvent | ||
ITEM_EDIT_BEGIN : String = "itemEditBegin" [statico]
The ListEvent.ITEM_EDIT_BEGIN constant defines the value of the
type property of the event object for a
itemEditBegin event, which indicates that an
item is ready to be edited. | ListEvent | ||
ITEM_EDIT_BEGINNING : String = "itemEditBeginning" [statico]
The ListEvent.ITEM_EDIT_BEGINNING constant defines the value of the
type property of the ListEvent object for a
itemEditBeginning event, which indicates that the user has
prepared to edit an item, for example, by releasing the mouse button
over the item. | ListEvent | ||
ITEM_EDIT_END : String = "itemEditEnd" [statico]
The ListEvent.ITEM_EDIT_END constant defines the value of the
type property of the ListEvent object for a
itemEditEnd event, which indicates that an edit
session is ending. | ListEvent | ||
ITEM_FOCUS_IN : String = "itemFocusIn" [statico]
The ListEvent.ITEM_FOCUS_IN constant defines the value of the
type property of the ListEvent object for an
itemFocusIn event, which indicates that an item
has received the focus. | ListEvent | ||
ITEM_FOCUS_OUT : String = "itemFocusOut" [statico]
The ListEvent.ITEM_FOCUS_OUT constant defines the value of the
type property of the ListEvent object for an
itemFocusOut event, which indicates that an item
has lost the focus. | ListEvent | ||
ITEM_ROLL_OUT : String = "itemRollOut" [statico]
The ListEvent.ITEM_ROLL_OUT constant defines the value of the
type property of the ListEvent object for an
itemRollOut event, which indicates that the user rolled
the mouse pointer out of a visual item in the control. | ListEvent | ||
ITEM_ROLL_OVER : String = "itemRollOver" [statico]
The ListEvent.ITEM_ROLL_OVER constant defines the value of the
type property of the ListEvent object for an
itemRollOver event, which indicates that the user rolled
the mouse pointer over a visual item in the control. | ListEvent |
columnIndex | proprietà |
public var columnIndex:int
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
The zero-based index of the column that contains the item renderer where the event occurred.
itemRenderer | proprietà |
public var itemRenderer:IListItemRenderer
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
The item renderer where the event occurred. You can access the data provider item using this property.
reason | proprietà |
public var reason:String
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
The reason the itemEditEnd
event was dispatched.
Valid only for events with type ITEM_EDIT_END
.
The possible values are defined in the ListEventReason class.
Elementi API correlati
rowIndex | proprietà |
public var rowIndex:int
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
In the zero-based index of the row that contains the item renderer where the event occured, or for editing events, the index of the item in the data provider that is being edited.
ListEvent | () | Funzione di costruzione |
public function ListEvent(type:String, bubbles:Boolean = false, cancelable:Boolean = false, columnIndex:int = -1, rowIndex:int = -1, reason:String = null, itemRenderer:IListItemRenderer = null)
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
Constructor. Normally called by the Flex control and not used in application code.
Parametritype:String — The event type; indicates the action that caused the event.
| |
bubbles:Boolean (default = false ) — Specifies whether the event can bubble
up the display list hierarchy.
| |
cancelable:Boolean (default = false ) — Specifies whether the behavior
associated with the event can be prevented.
| |
columnIndex:int (default = -1 ) — The zero-based index of the column that contains
the renderer.
| |
rowIndex:int (default = -1 ) — The zero-based index of the row that contains
the renderer, or for editing events, the index of the item in
the data provider that is being edited
| |
reason:String (default = null ) — The reason for an itemEditEnd event.
| |
itemRenderer:IListItemRenderer (default = null ) — The item renderer for the data provider item.
|
CHANGE | Costante |
public static const CHANGE:String = "change"
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
The ListEvent.CHANGE constant defines the value of the
type
property of the ListEvent object for a
change
event, which indicates that selection
changed as a result of user interaction.
The properties of the event object have the following values:
Property | Value |
---|---|
bubbles | false |
cancelable | false |
columnIndex | The zero-based index of the column associated with the event. |
currentTarget | The Object that defines the
event listener that handles the event. For example, if you use
myButton.addEventListener() to register an event listener,
myButton is the value of the currentTarget . |
itemRenderer | The item renderer that was clicked. |
reason | null |
rowIndex | The zero-based index of the item associated with the event. |
target | The Object that dispatched the event;
it is not always the Object listening for the event.
Use the currentTarget property to always access the
Object listening for the event. |
Type | ListEvent.CHANGE |
ITEM_CLICK | Costante |
public static const ITEM_CLICK:String = "itemClick"
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
The ListEvent.ITEM_CLICK constant defines the value of the
type
property of the ListEvent object for an
itemClick
event, which indicates that the
user clicked the mouse over a visual item in the control.
The properties of the event object have the following values:
Property | Value |
---|---|
bubbles | false |
cancelable | false |
columnIndex | The zero-based index of the column associated with the event. |
currentTarget | The Object that defines the
event listener that handles the event. For example, if you use
myButton.addEventListener() to register an event listener,
myButton is the value of the currentTarget . |
itemRenderer | The item renderer that was clicked. |
reason | null |
rowIndex | The zero-based index of the item associated with the event. |
target | The Object that dispatched the event;
it is not always the Object listening for the event.
Use the currentTarget property to always access the
Object listening for the event. |
Type | ListEvent.ITEM_CLICK |
ITEM_DOUBLE_CLICK | Costante |
public static const ITEM_DOUBLE_CLICK:String = "itemDoubleClick"
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
The ListEvent.ITEM_DOUBLE_CLICK constant defines the value of the
type
property of the ListEvent object for an
itemDoubleClick
event, which indicates that the
user double clicked the mouse over a visual item in the control.
To receive itemDoubleClick events, you must set the component's
doubleClickEnabled
property to true
.
The properties of the event object have the following values:
Property | Value |
---|---|
bubbles | false |
cancelable | false |
columnIndex | The zero-based index of the column associated with the event. |
currentTarget | The Object that defines the
event listener that handles the event. For example, if you use
myButton.addEventListener() to register an event listener,
myButton is the value of the currentTarget . |
itemRenderer | The item renderer that was double clicked. |
reason | null |
rowIndex | The zero-based index of the item associated with the event. |
target | The Object that dispatched the event;
it is not always the Object listening for the event.
Use the currentTarget property to always access the
Object listening for the event. |
Type | ListEvent.ITEM_DOUBLE_CLICK |
ITEM_EDIT_BEGIN | Costante |
public static const ITEM_EDIT_BEGIN:String = "itemEditBegin"
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
The ListEvent.ITEM_EDIT_BEGIN constant defines the value of the
type
property of the event object for a
itemEditBegin
event, which indicates that an
item is ready to be edited.
The default listener for this event performs the following actions:
- Creates an item editor object via a call to the
createItemEditor()
method. - Copies the
data
property from the item to the editor. By default, the item editor object is an instance of the TextInput control. You use theitemEditor
property of the list control to specify a custom item editor class. - Set the
itemEditorInstance
property of the list control to reference the item editor instance.
You can write an event listener for this event to modify the data passed to the item editor. For example, you might modify the data, its format, or other information used by the item editor.
You can also create an event listener to specify the item editor used to edit the item. For example, you might have two different item editors. Within the event listener you can examine the data to be edited or other information, and open the appropriate item editor by doing the following:
- Call
preventDefault()
to stop Flex from calling thecreateItemEditor()
method as part of the default event listener. - Set the
itemEditor
property to the appropriate editor. - Call the
createItemEditor()
method.
The properties of the event object have the following values:
Property | Value |
---|---|
bubbles | false |
cancelable | true |
columnIndex | The zero-based index of the column associated with the event. |
currentTarget | The Object that defines the
event listener that handles the event. For example, if you use
myButton.addEventListener() to register an event listener,
myButton is the value of the currentTarget . |
itemRenderer | The item renderer for the item that is being edited. |
reason | null |
rowIndex | The zero-based index of the item associated with the event. |
target | The Object that dispatched the event;
it is not always the Object listening for the event.
Use the currentTarget property to always access the
Object listening for the event. |
Type | ListEvent.ITEM_EDIT_BEGIN |
ITEM_EDIT_BEGINNING | Costante |
public static const ITEM_EDIT_BEGINNING:String = "itemEditBeginning"
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
The ListEvent.ITEM_EDIT_BEGINNING constant defines the value of the
type
property of the ListEvent object for a
itemEditBeginning
event, which indicates that the user has
prepared to edit an item, for example, by releasing the mouse button
over the item.
The default listener for this event sets the List.editedItemPosition
property to the item that has focus, which starts the item editing session.
You typically write your own event listener for this event to
disallow editing of a specific item or items.
Calling the preventDefault()
method from within your own
event listener for this event prevents the default listener from executing.
The properties of the event object have the following values:
Property | Value |
---|---|
bubbles | false |
cancelable | true |
columnIndex | The zero-based index of the column associated with the event. |
currentTarget | The Object that defines the
event listener that handles the event. For example, if you use
myButton.addEventListener() to register an event listener,
myButton is the value of the currentTarget . |
itemRenderer | The item renderer for the item that will be edited. This property is null if this event is generated by keyboard, as the item to be edited may be off-screen. |
reason | null |
rowIndex | The zero-based index of the item associated with the event. |
target | The Object that dispatched the event;
it is not always the Object listening for the event.
Use the currentTarget property to always access the
Object listening for the event. |
Type | ListEvent.ITEM_EDIT_BEGIN |
ITEM_EDIT_END | Costante |
public static const ITEM_EDIT_END:String = "itemEditEnd"
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
The ListEvent.ITEM_EDIT_END constant defines the value of the
type
property of the ListEvent object for a
itemEditEnd
event, which indicates that an edit
session is ending.
The list components have a default handler for this event that copies the data from the item editor to the data provider of the list control. The default event listener performs the following actions:
- Uses the
editorDataField
property of the list control to determine the property of the item editor containing the new data and updates the data provider item with that new data. Since the default item editor is the TextInput control, the default value of theeditorDataField
property is"text"
, to specify that thetext
property of the TextInput contains the new item data. - Calls the
destroyItemEditor()
method to close the item editor.
You typically write an event listener for this event to perform the following actions:
- In your event listener, you can modify the data returned by the editor
to the list component. For example, you can reformat the data before returning
it to the list control. By default, an item editor can only return a single value.
You must write an event listener for the
itemEditEnd
event if you want to return multiple values. - In your event listener, you can examine the data entered into the item editor.
If the data is incorrect, you can call the
preventDefault()
method to stop Flex from passing the new data back to the list control and from closing the editor.
The properties of the event object have the following values:
Property | Value |
---|---|
bubbles | false |
cancelable | true |
columnIndex | The zero-based index of the column associated with the event. |
currentTarget | The Object that defines the
event listener that handles the event. For example, if you use
myButton.addEventListener() to register an event listener,
myButton is the value of the currentTarget . |
itemRenderer | The item renderer for the item that was edited. |
reason | A constant defining the reason for the event.
The value must be a member of the ListEventReson class. |
rowIndex | The zero-based index of the item associated with the event. |
target | The Object that dispatched the event;
it is not always the Object listening for the event.
Use the currentTarget property to always access the
Object listening for the event. |
Type | ListEvent.ITEM_EDIT_END |
ITEM_FOCUS_IN | Costante |
public static const ITEM_FOCUS_IN:String = "itemFocusIn"
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
The ListEvent.ITEM_FOCUS_IN constant defines the value of the
type
property of the ListEvent object for an
itemFocusIn
event, which indicates that an item
has received the focus.
The properties of the event object have the following values:
Property | Value |
---|---|
bubbles | false |
cancelable | true |
columnIndex | The zero-based index of the column associated with the event. |
currentTarget | The Object that defines the
event listener that handles the event. For example, if you use
myButton.addEventListener() to register an event listener,
myButton is the value of the currentTarget . |
itemRenderer | The item editor instance for the item that is being edited. |
reason | null |
rowIndex | The zero-based index of the item associated with the event. |
target | The Object that dispatched the event;
it is not always the Object listening for the event.
Use the currentTarget property to always access the
Object listening for the event. |
Type | ListEvent.ITEM_FOCUS_IN |
ITEM_FOCUS_OUT | Costante |
public static const ITEM_FOCUS_OUT:String = "itemFocusOut"
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
The ListEvent.ITEM_FOCUS_OUT constant defines the value of the
type
property of the ListEvent object for an
itemFocusOut
event, which indicates that an item
has lost the focus.
The properties of the event object have the following values:
Property | Value |
---|---|
bubbles | false |
cancelable | false |
columnIndex | The zero-based index of the column associated with the event. |
currentTarget | The Object that defines the
event listener that handles the event. For example, if you use
myButton.addEventListener() to register an event listener,
myButton is the value of the currentTarget . |
itemRenderer | The item editor instance for the item that was being edited. |
reason | null |
rowIndex | The zero-based index of the item associated with the event. |
target | The Object that dispatched the event;
it is not always the Object listening for the event.
Use the currentTarget property to always access the
Object listening for the event. |
Type | ListEvent.ITEM_FOCUS_OUT |
ITEM_ROLL_OUT | Costante |
public static const ITEM_ROLL_OUT:String = "itemRollOut"
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
The ListEvent.ITEM_ROLL_OUT constant defines the value of the
type
property of the ListEvent object for an
itemRollOut
event, which indicates that the user rolled
the mouse pointer out of a visual item in the control.
The properties of the event object have the following values:
Property | Value |
---|---|
bubbles | false |
cancelable | false |
columnIndex | The zero-based index of the column associated with the event. |
currentTarget | The Object that defines the
event listener that handles the event. For example, if you use
myButton.addEventListener() to register an event listener,
myButton is the value of the currentTarget . |
itemRenderer | The item renderer that was rolled out. |
reason | null |
rowIndex | The zero-based index of the item associated with the event. |
target | The Object that dispatched the event;
it is not always the Object listening for the event.
Use the currentTarget property to always access the
Object listening for the event. |
Type | ListEvent.ITEM_ROLL_OUT |
ITEM_ROLL_OVER | Costante |
public static const ITEM_ROLL_OVER:String = "itemRollOver"
Versione linguaggio: | ActionScript 3.0 |
Versione prodotto: | Flex 3 |
Versioni runtime: | Flash Player 9, AIR 1.1 |
The ListEvent.ITEM_ROLL_OVER constant defines the value of the
type
property of the ListEvent object for an
itemRollOver
event, which indicates that the user rolled
the mouse pointer over a visual item in the control.
The properties of the event object have the following values:
Property | Value |
---|---|
bubbles | false |
cancelable | false |
columnIndex | The zero-based index of the column associated with the event. |
currentTarget | The Object that defines the
event listener that handles the event. For example, if you use
myButton.addEventListener() to register an event listener,
myButton is the value of the currentTarget . |
itemRenderer | The item renderer that was rolled over. |
reason | null |
rowIndex | The zero-based index of the item associated with the event. |
target | The Object that dispatched the event;
it is not always the Object listening for the event.
Use the currentTarget property to always access the
Object listening for the event. |
Type | ListEvent.ITEM_ROLL_OVER |
Tue Jun 12 2018, 02:44 PM Z