Referencia de ActionScript® 3.0 para la plataforma de Adobe® Flash®
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spark.components.gridClasses 

GridColumn  - AS3 Flex

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Elementos del lenguaje

Constantes globales
Funciones globales
Operadores
Sentencias, palabras clave y directivas
Tipos especiales

Apéndices

Novedades
Errores del compilador
Advertencias del compilador
Errores en tiempo de ejecución
Migración a ActionScript 3
Conjuntos de caracteres admitidos
Solo etiquetas MXML
Elementos Motion XML
Etiquetas de texto temporizado
Lista de elementos desfasados
Constantes de implementación de accesibilidad
Cómo utilizar ejemplos de ActionScript
Avisos legales
Paquetespark.components.gridClasses
Clasepublic class GridColumn
HerenciaGridColumn Inheritance EventDispatcher Inheritance Object

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

The GridColumn class defines a column of a Spark grid control, such as the Spark DataGrid or Grid control. Each data provider item for the control corresponds to one row of the grid. The GridColumn class specifies the field of the data provider item whose value is to be displayed in the column. It also specifies the item renderer used to display that value, the item editor used to change the value, and other properties of the column.

Sintaxis MXMLexpandedOcultar sintaxis MXML

The <s:GridColumn> tag inherits all of the tag attributes of its superclass and adds the following tag attributes:

  <s:GridColumn
    Properties
    dataField="null"
    dataTipField="null"
    dataTipFormatter="null"
    dataTipFunction="null"
    editable="true"
    formatter="null"
    headerRenderer="null"
    headerText="value of dataField"
    imeMode="null"
    itemEditor="null"
    itemRenderer="null"
    itemRendererFunction="null"
    labelFunction="null"
    maxWidth="NaN"
    minWidth="20"
    rendererIsEditable="false"
    resizeable="true"
    showDataTips="undefined"
    sortable="true"
    sortCompareFunction="null"
    sortDescending="false"
    visible="true"
    width="NaN"
  />
  

Ver los ejemplos

Elementos de API relacionados



Propiedades públicas
 PropiedadDefinido por
  columnIndex : int
[solo lectura] The position of this column in the grid's column list, or -1 if this column's grid is null.
GridColumn
 Inheritedconstructor : Object
Una referencia a la clase de objeto o función constructora para una instancia de objeto determinada.
Object
  dataField : String
The name of the field or property in the data provider item associated with the column.
GridColumn
  dataTipField : String
The name of the field in the data provider to display as the datatip.
GridColumn
  dataTipFormatter : IFormatter
Specifies the formatter used by the column's itemToDataTip() method to convert data provider items to Strings.
GridColumn
  dataTipFunction : Function
Specifies a callback function to run on each item of the data provider to determine its data tip.
GridColumn
  editable : Boolean
Indicates whether the items in the column are editable.
GridColumn
  formatter : IFormatter
Specifies the formatter used by the column's itemToLabel() method to convert data provider items to strings.
GridColumn
  grid : Grid
[solo lectura] The Grid object associated with this column.
GridColumn
  headerRenderer : IFactory
The class factory for the IGridItemRenderer class used as the header for this column.
GridColumn
  headerText : String
Text for the header of this column.
GridColumn
  imeMode : String
Specifies the IME (Input Method Editor) mode.
GridColumn
  itemEditor : IFactory
A class factory for IGridItemEditor class used to edit individual grid cells in this column.
GridColumn
  itemRenderer : IFactory
The class factory for the IGridItemRenderer class used to render individual grid cells.
GridColumn
  itemRendererFunction : Function
If specified, the value of this property must be an idempotent function that returns an item renderer IFactory based on its data provider item and column parameters.
GridColumn
  labelFunction : Function
An idempotent function that converts a data provider item into a column-specific string that's used to initialize the item renderer's label property.
GridColumn
  maxWidth : Number
The maximum width of this column in pixels.
GridColumn
  minWidth : Number
The minimum width of this column in pixels.
GridColumn
  rendererIsEditable : Boolean
Determines whether any of the item renderer's controls are editable.
GridColumn
  resizable : Boolean
Indicates whether the user is allowed to resize the width of the column.
GridColumn
  showDataTips : *
Indicates whether the datatips are shown in the column.
GridColumn
  sortable : Boolean
If true, and if the grid's data provider is an ICollectionView, and if the associated grid's sortableColumns property is true, then this column supports interactive sorting.
GridColumn
  sortCompareFunction : Function
The function that compares two elements during a sort of on the data elements of this column.
GridColumn
  sortDescending : Boolean
If true, this column is sorted in descending order.
GridColumn
  sortField : SortField
[solo lectura] Returns a SortField that can be used to sort a collection by this column's dataField.
GridColumn
  visible : Boolean
If true, then display this column.
GridColumn
  width : Number
The width of this column in pixels.
GridColumn
Métodos públicos
 MétodoDefinido por
  
GridColumn(columnName:String = null)
Constructor.
GridColumn
 Inherited
addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registra un objeto de detector de eventos con un objeto EventDispatcher, de modo que el detector reciba la notificación de un evento.
EventDispatcher
 Inherited
Distribuye un evento en el flujo del evento.
EventDispatcher
 Inherited
Comprueba si el objeto EventDispatcher tiene detectores registrados para un tipo concreto de evento.
EventDispatcher
 Inherited
Indica si un objeto tiene definida una propiedad especificada.
Object
 Inherited
Indica si hay una instancia de la clase Object en la cadena de prototipo del objeto especificado como parámetro.
Object
  
Convert the specified data provider item to a column-specific datatip String.
GridColumn
  
Convert the specified data provider item to a column-specific String.
GridColumn
  
Convert the specified data provider item to a column-specific item renderer factory.
GridColumn
 Inherited
Indica si existe la propiedad especificada y si es enumerable.
Object
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Elimina un detector del objeto EventDispatcher.
EventDispatcher
 Inherited
Establece la disponibilidad de una propiedad dinámica para operaciones de bucle.
Object
 Inherited
Devuelve la representación de cadena de este objeto, con formato según las convenciones específicas de configuración regional.
Object
 Inherited
Devuelve la representación de cadena del objeto especificado.
Object
 Inherited
Devuelve el valor simple del objeto especificado.
Object
 Inherited
Comprueba si hay registrado un detector de eventos con este objeto EventDispatcher o con cualquiera de sus ascendientes para el tipo de evento concreto.
EventDispatcher
Eventos
 Evento Resumen Definido por
 Inherited[evento broadcast] Se distribuye cuando Flash Player o AIR pasan a estar activos.EventDispatcher
 Inherited[evento broadcast] Se distribuye cuando Flash Player o de AIR pasan a estar inactivos.EventDispatcher
Constantes públicas
 ConstanteDefinido por
  ERROR_TEXT : String = "unknown"
[estática] The return value for the itemToLabel() or itemToDataTip() method if resolving the corresponding property name (path) fails.
GridColumn
Información sobre propiedades

columnIndex

propiedad
columnIndex:int  [solo lectura]

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

The position of this column in the grid's column list, or -1 if this column's grid is null.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento columnIndexChanged .



Implementación
    public function get columnIndex():int

dataField

propiedad 
dataField:String

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

The name of the field or property in the data provider item associated with the column. Each GridColumn requires this property or the labelFunction property to be set to calculate the displayable text for the item renderer. If the dataField and labelFunction properties are set, the data is displayed using the labelFunction and sorted using the dataField.

This value of this property is not necessarily the String that is displayed in the column header. This property is used only to access the data in the data provider. For more information, see the headerText property.

If the column or its grid specifies a labelFunction, then the dataField is not used.

El valor predeterminado es null.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento dataFieldChanged .



Implementación
    public function get dataField():String
    public function set dataField(value:String):void

Elementos de API relacionados

dataTipField

propiedad 
dataTipField:String

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

The name of the field in the data provider to display as the datatip. By default, if showDataTips is true, the associated grid control looks for a property named label on each data provider item and displays it. However, if the data provider does not contain a label property, you can set the dataTipField property to specify a different property name. For example, you could set the value to "FullName" when a user views a set of people's names included from a database.

GridColumn.dataTipField takes precedence over this property.

If this column or its grid specifies a value for the dataTipFunction property, then the dataTipField property is ignored.

El valor predeterminado es null.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento dataTipFieldChanged .



Implementación
    public function get dataTipField():String
    public function set dataTipField(value:String):void

Elementos de API relacionados

dataTipFormatter

propiedad 
dataTipFormatter:IFormatter

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

Specifies the formatter used by the column's itemToDataTip() method to convert data provider items to Strings.

If the formatter's styleParent was not specified, it's set to the column's grid, so that the formatter inherits the grid's locale style.

El valor predeterminado es null.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento dataTipFormatterChanged .



Implementación
    public function get dataTipFormatter():IFormatter
    public function set dataTipFormatter(value:IFormatter):void

Elementos de API relacionados

dataTipFunction

propiedad 
dataTipFunction:Function

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

Specifies a callback function to run on each item of the data provider to determine its data tip. This property is used by the itemToDataTip method.

By default, if showDataTips is true, the column looks for a property named label on each data provider item and displays it as its data tip. However, some data providers do not have a label property nor do they have another property that you can use for displaying data in the rows.

For example, you have a data provider that contains a lastName and firstName fields, but you want to display full names as the data tip. You can specify a function to the dataTipFunction property that returns a single String containing the value of both fields. You can also use the dataTipFunction property for handling formatting and localization.

The signature of the dataTipFunction function must match the following:

dataTipFunction(item:Object, column:GridColumn):String
The item parameter is the data provider item for an entire row. The second parameter is this column object.

A typical function might concatenate an item's firstName and lastName properties, or do some custom formatting on a Date value property.

El valor predeterminado es null.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento dataTipFunctionChanged .



Implementación
    public function get dataTipFunction():Function
    public function set dataTipFunction(value:Function):void

Elementos de API relacionados

editable

propiedad 
editable:Boolean

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

Indicates whether the items in the column are editable. If true, and the associated grid's editable property is also true, the items in a column are editable and can be individually edited by clicking on a selected item, or by navigating to the item and pressing the F2 key.

El valor predeterminado es true.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento editableChanged .



Implementación
    public function get editable():Boolean
    public function set editable(value:Boolean):void

formatter

propiedad 
formatter:IFormatter

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

Specifies the formatter used by the column's itemToLabel() method to convert data provider items to strings.

If the formatter's styleParent was not specified, it's set to the column's grid, so that the formatter inherits the grid's locale style.

El valor predeterminado es null.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento formatterChanged .



Implementación
    public function get formatter():IFormatter
    public function set formatter(value:IFormatter):void

Elementos de API relacionados

grid

propiedad 
grid:Grid  [solo lectura]

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

The Grid object associated with this column.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento gridChanged .



Implementación
    public function get grid():Grid

headerRenderer

propiedad 
headerRenderer:IFactory

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

The class factory for the IGridItemRenderer class used as the header for this column. If unspecified, the DataGrid controls's columnHeaderGroup skin part defines the default header renderer.

El valor predeterminado es null.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento headerRendererChanged .



Implementación
    public function get headerRenderer():IFactory
    public function set headerRenderer(value:IFactory):void

Elementos de API relacionados

headerText

propiedad 
headerText:String

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

Text for the header of this column. By default, the associated grid control uses the value of the dataField property as the header text.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento headerTextChanged .



Implementación
    public function get headerText():String
    public function set headerText(value:String):void

imeMode

propiedad 
imeMode:String

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

Specifies the IME (Input Method Editor) mode. The IME enables users to enter text in Chinese, Japanese, and Korean. Flex sets the specified IME mode when the control gets the focus, and sets it back to the previous value when the control loses the focus.

The flash.system.IMEConversionMode class defines constants for the valid values for this property. You can also specify null to specify no IME.

El valor predeterminado es null.



Implementación
    public function get imeMode():String
    public function set imeMode(value:String):void

Elementos de API relacionados

itemEditor

propiedad 
itemEditor:IFactory

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

A class factory for IGridItemEditor class used to edit individual grid cells in this column. If this property is null, and the column grid's owner is a DataGrid control, then the value of the DataGrid control's itemEditor property is used. If no item editor is specified by the DataGrid control, then use the DefaultGridItemEditor class.

The default item editor is the DefaultGridItemEditor class, which lets you edit a simple text field. You can create custom item renderers by creating a subclass of the GridItemEditor class. Your custom item editor can write data to the entire row of the grid to define more complex editor.

El valor predeterminado es null.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento itemEditorChanged .



Implementación
    public function get itemEditor():IFactory
    public function set itemEditor(value:IFactory):void

Elementos de API relacionados

itemRenderer

propiedad 
itemRenderer:IFactory

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

The class factory for the IGridItemRenderer class used to render individual grid cells. If not specified, use the value of the itemRenderer property from the associated grid control.

The default item renderer is the DefaultGridItemRenderer class, which displays the data item as text. You can create custom item renderers by creating a subclass of the GridItemRenderer class. Your custom item renderer can access the data from the entire row of the grid to define more complex visual representation of the cell.

The default value is the value of the itemRenderer property from the associated grid control, or null.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento itemRendererChanged .



Implementación
    public function get itemRenderer():IFactory
    public function set itemRenderer(value:IFactory):void

Elementos de API relacionados

itemRendererFunction

propiedad 
itemRendererFunction:Function

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

If specified, the value of this property must be an idempotent function that returns an item renderer IFactory based on its data provider item and column parameters. Specifying a value to the itemRendererFunction property makes it possible to use more than one item renderer in this column.

The function specified to the itemRendererFunction property must have the following signature:

itemRendererFunction(item:Object, column:GridColumn):IFactory

The item parameter is the data provider item for an entire row. The second parameter is this column object.

Shown below is an example of an item renderer function:

      function myItemRendererFunction(item:Object, column:GridColumn):IFactory
      {
          return (item is Array) ? myArrayItemRenderer : myItemRenderer;
      }
      

El valor predeterminado es null.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento itemRendererFunctionChanged .



Implementación
    public function get itemRendererFunction():Function
    public function set itemRendererFunction(value:Function):void

labelFunction

propiedad 
labelFunction:Function

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

An idempotent function that converts a data provider item into a column-specific string that's used to initialize the item renderer's label property.

You can use a label function to combine the values of several data provider items into a single string. If specified, this property is used by the itemToLabel() method, which computes the value of each item renderer's label property in this column.

The function specified to the labelFunction property must have the following signature:

labelFunction(item:Object, column:GridColumn):String

The item parameter is the data provider item for an entire row. The second parameter is this column object.

A typical label function could concatenate the firstName and lastName properties of the data provider item , or do some custom formatting on a Date value property.

El valor predeterminado es null.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento labelFunctionChanged .



Implementación
    public function get labelFunction():Function
    public function set labelFunction(value:Function):void

Elementos de API relacionados

maxWidth

propiedad 
maxWidth:Number

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

The maximum width of this column in pixels. If specified, the grid's layout makes the column's layout width the smaller of the width of the typicalItem and the maxWidth. If this column is resizable, this property limits how wide the user can make this column. Setting this property does not change the width or minWidth properties.

El valor predeterminado es NaN.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento maxWidthChanged .



Implementación
    public function get maxWidth():Number
    public function set maxWidth(value:Number):void

minWidth

propiedad 
minWidth:Number

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

The minimum width of this column in pixels. If specified, the grid's layout makes the column's layout width the larger of the width of the typicalItem and the minWidth. If this column is resizable, this property limits how small the user can make this column. Setting this property does not change the width or maxWidth properties.

El valor predeterminado es 20.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento minWidthChanged .



Implementación
    public function get minWidth():Number
    public function set minWidth(value:Number):void

rendererIsEditable

propiedad 
rendererIsEditable:Boolean

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

Determines whether any of the item renderer's controls are editable. If the column is editable, the focusable controls in the item renderer are given keyboard focus when the user starts editing the item renderer.

When you set this property to true, the cell becomes editable when the user clicks inside of it. Because the cell is editable, the DataGrid displays the editorIndicator skin part, which appears on top of the selectionIndicator skin part. Therefore, the user does not see an indicator for cell selection until the edit session is complete. You can create a custom skin to remove or modify the editorIndicator skin part so that the selectionIndicator skin part appears. For example, you can set alpha property of the editorIndicator to allow the selectionIndicator to show through, or change the size of the editorIndicator so that it is smaller than the cell.

By setting this property to true, you take responsibility for validating and saving input collected by the item renderer. If the item renderer contains an override of the IGridItemRenderer.prepare() method, then you must ensure that unsaved input field changes are not overwritten. For example, rendererIsEditable is true and the renderer contains a single TextInput element that displays the value of data.myDataField. If the renderer's prepare() method sets the TextInput control's text property, then the prepare() method must not set the text property when there are pending changes.

El valor predeterminado es false.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento rendererIsEditableChanged .



Implementación
    public function get rendererIsEditable():Boolean
    public function set rendererIsEditable(value:Boolean):void

resizable

propiedad 
resizable:Boolean

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

Indicates whether the user is allowed to resize the width of the column. If true, and the resizableColumns property of the associated grid is also true, the user can drag the grid lines between the column headers to resize the column.

El valor predeterminado es true.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento resizableChanged .



Implementación
    public function get resizable():Boolean
    public function set resizable(value:Boolean):void

showDataTips

propiedad 
showDataTips:*

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

Indicates whether the datatips are shown in the column. If true, datatips are displayed for text in the rows. Datatips are tooltips designed to show the text that is too long for the row.

If this property's value is undefined, the default, then the associated grid's showDataTips property determines if datatips are shown. If this property is set, the grid's showDataTips property is ignored.

El valor predeterminado es undefined.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento showDataTipsChanged .



Implementación
    public function get showDataTips():*
    public function set showDataTips(value:any):void

Elementos de API relacionados

sortable

propiedad 
sortable:Boolean

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

If true, and if the grid's data provider is an ICollectionView, and if the associated grid's sortableColumns property is true, then this column supports interactive sorting. Typically the column's header handles mouse clicks by setting the data provider's sort property to a Sort object whose SortField is this column's dataField.

If the data provider is not an ICollectionView, then this property has no effect.

El valor predeterminado es true.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento sortableChanged .



Implementación
    public function get sortable():Boolean
    public function set sortable(value:Boolean):void

sortCompareFunction

propiedad 
sortCompareFunction:Function

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

The function that compares two elements during a sort of on the data elements of this column. If you specify a value of the labelFunction property, you typically also provide a sortCompareFunction.

The sortCompareFunction's signature must match the following:

sortCompareFunction(obj1:Object, obj2:Object, column:GridColumn):int

The function should return a value based on the comparison of the objects:

  • -1 if obj1 should appear before obj2 in ascending order.
  • 0 if obj1 = obj2.
  • 1 if obj1 should appear after obj2 in ascending order.

The function may use the column parameter to write generic compare functions.

Note: The obj1 and obj2 parameters are entire data provider elements and not just the data for the item.

If the dataProvider is not an ICollectionView, then this property has no effect.

El valor predeterminado es null.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento sortCompareFunctionChanged .



Implementación
    public function get sortCompareFunction():Function
    public function set sortCompareFunction(value:Function):void

sortDescending

propiedad 
sortDescending:Boolean

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

If true, this column is sorted in descending order. For example, if the column's dataField contains a numeric value, then the first row would be the one with the largest value for this column.

Setting this property does not start a sort; it only sets the sort direction. When the dataProvider.refresh() method is called, the sort is performed.

If the data provider is not an ICollectionView, then this property has no effect.

El valor predeterminado es false.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento sortDescendingChanged .



Implementación
    public function get sortDescending():Boolean
    public function set sortDescending(value:Boolean):void

sortField

propiedad 
sortField:SortField  [solo lectura]

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

Returns a SortField that can be used to sort a collection by this column's dataField.

If the sortCompareFunction property is defined, then the SortField's compareFunction is automatically set.

If the sortCompareFunction property is not defined and the dataField is complex, then the SortField's compare function is assigned to a closure around a default compare function that handles the complex dataField.

If the sortCompareFunction and dataField properties are not defined, but the labelFunction property is defined, then it assigns the compareFunction to a closure that does a basic string compare on the labelFunction applied to the data objects.



Implementación
    public function get sortField():SortField

Elementos de API relacionados

visible

propiedad 
visible:Boolean

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

If true, then display this column. If false, no space will be allocated for this column; it will not be included in the layout.

El valor predeterminado es true.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento visibleChanged .



Implementación
    public function get visible():Boolean
    public function set visible(value:Boolean):void

width

propiedad 
width:Number

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

The width of this column in pixels. If specified, the grid's layout ignores its typicalItem property and this column's minWidth and maxWidth properties.

El valor predeterminado es NaN.

Esta propiedad se puede utilizar como origen para la vinculación de datos. Cuando se modifica esta propiedad, distribuye el evento widthChanged .



Implementación
    public function get width():Number
    public function set width(value:Number):void
Información sobre constructores

GridColumn

()Información sobre
public function GridColumn(columnName:String = null)

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

Constructor.

Parámetros
columnName:String (default = null) — Initial value for the dataField and headerText properties.
Información sobre métodos

itemToDataTip

()método
public function itemToDataTip(item:Object):String

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

Convert the specified data provider item to a column-specific datatip String.

This method uses the values dataTipField and dataTipFunction. If those properties are null, it uses the corresponding properties from the associated grid control. If dataTipField properties is also null in the grid control, then use the dataField property.

If dataTipFunction and dataTipFormatter are null, then this method's value is the same as: item[dataTipField].toString(). If dataTipFormatter is specified then this method's value is the same as: dataTipFormatter.format(item[dataTipField]) If resolving the item's dataField causes an error to be thrown, ERROR_TEXT is returned.

If item and dataTipFunction are not null, then this method returns dataTipFunction(item, this), where the second argument is this GridColumn.

Parámetros

item:Object — The value of grid.dataProvider.getItemAt(rowIndex).

Valor devuelto
String — A column-specific string for the specified data provider item or ERROR_TEXT.

itemToLabel

()método 
public function itemToLabel(item:Object):String

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

Convert the specified data provider item to a column-specific String. This method is used to initialize item renderers' label property.

If labelFunction is null, and dataField is a string that does not contain "." field name separator characters, and formatter is null, then this method is equivalent to:

item[dataField].toString()

If the formatter was specified, then this method's value is:

formatter.format(item[dataField])

If dataField is a "." separated path, then this method looks up each successive path element. For example if ="foo.bar.baz", then this method returns a string based on the value of item.foo.bar.baz. If resolving the item's dataField causes an error to be thrown, ERROR_TEXT is returned.

If item and labelFunction are not null, then this method returns labelFunction(item, this), where the second argument is this GridColumn.

Parámetros

item:Object — The value of grid.dataProvider.getItemAt(rowIndex).

Valor devuelto
String — A column-specific string for the specified dataProvider item or ERROR_TEXT.

itemToRenderer

()método 
public function itemToRenderer(item:Object):IFactory

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

Convert the specified data provider item to a column-specific item renderer factory. By default this method calls the itemRendererFunction if it's non-null, otherwise it just returns the value of the column's itemRenderer property.

Parámetros

item:Object — The value of grid.dataProvider.getItemAt(rowIndex).

Valor devuelto
IFactory — A column-specific item renderer factory for the specified dataProvider item.
Información sobre constantes

ERROR_TEXT

Constante
public static const ERROR_TEXT:String = "unknown"

Versión del lenguaje: ActionScript 3.0
Versión de producto: Flex 4.5
Versiones de motor de ejecución: Flash Player 10, AIR 2.5

The return value for the itemToLabel() or itemToDataTip() method if resolving the corresponding property name (path) fails. The value of this constant is a single space String: " ".

Elementos de API relacionados

GridColumnExample.mxml
<?xml version="1.0" encoding="utf-8"?>

<!--

A simple example of a DataGrid with explicitly specified columns.

The DataGrid's columns are specified by an ArrayList (an IList) and can always be accessed as such.  
For example dataGrid.columns.length returns the total number of columns and 
dataGrid.columns.getItemAt(index) returns the GridColumn at the specified index.  The columns list 
is mutable, which means that GridColumns can be added or removed at any time.

Column widths do not depend on the column's headerText, they're based on the rendered widths of 
the DataGrid's typicalItem. If that's not specified, then the first data item is used.  That's the 
case here.  Each column can specify an explicit width and by default all GridColumns are 
resizable="true", which means that the column can be interactively resized by dragging the edges 
between columns.  Interactively resizing column widths changes the DataGrid's measuredWidth which 
can be a little disconcerting if the DataGrid's width is not constrained.  In this example we've 
constrained the DataGrid's left and right edges which prevents changes in the DataGrid's 
measuredWidth from affecting its actual width.

-->

<s:Application 
    xmlns:fx="http://ns.adobe.com/mxml/2009" 
    xmlns:s="library://ns.adobe.com/flex/spark">
    
    <s:Panel title="Spark DataGrid Control Example which demonstrates a simple DataGrid with explicitly specified columns"
             width="75%" height="75%" 
             horizontalCenter="0" verticalCenter="0">
        
        <s:DataGrid id="dataGrid" left="5" right="5" top="5" bottom="5">
            <s:columns>
                <s:ArrayList>
                    <s:GridColumn dataField="key" headerText="Key"/>
                    <s:GridColumn dataField="name" headerText="Name"/>
                    <s:GridColumn dataField="price" headerText="Price"/>
                    <s:GridColumn dataField="call" headerText="Call"/>
                </s:ArrayList>
            </s:columns>
            
            <s:ArrayCollection>
                <s:DataItem key="1000" name="Abrasive" price="100.11" call="false"/>
                <s:DataItem key="1001" name="Brush" price="110.01" call="true"/>
                <s:DataItem key="1002" name="Clamp" price="120.02" call="false"/>
                <s:DataItem key="1003" name="Drill" price="130.03" call="true"/>
                <s:DataItem key="1004" name="Epoxy" price="140.04" call="false"/>
                <s:DataItem key="1005" name="File" price="150.05" call="true"/>
                <s:DataItem key="1006" name="Gouge" price="160.06" call="false"/>
                <s:DataItem key="1007" name="Hook" price="170.07" call="true"/>
                <s:DataItem key="1008" name="Ink" price="180.08" call="false"/>
                <s:DataItem key="1009" name="Jack" price="190.09" call="true"/>             
            </s:ArrayCollection>
        </s:DataGrid>    
    </s:Panel>
</s:Application>    
GridColumnVisibilityExample.mxml
<?xml version="1.0" encoding="utf-8"?>

<!--

Demonstrate the GridColumn visible property and the support for dynamically adding and removing columns.

After selecting a column it's visibility can be changed, a copy of the column can be inserted, and the column can be removed.

The DataGrid columns property is a mutable list - an IList, like ArrayList - and columns can be added or removed at any time.  The difference 
between an IList and an intrinsic collection type like Array or Vector is that ILists dispatch events when they're changed.   That's why the
DropDownList, whose dataProvider is the list of columns, tracks the changes made with the Add/Remove buttons.

Changing a column's visibility does not change its presence or position in the columns IList but it prevents the DataGrid from displaying it.

-->

<s:Application 
    xmlns:fx="http://ns.adobe.com/mxml/2009" 
    xmlns:s="library://ns.adobe.com/flex/spark">
    
    <fx:Script>
        <![CDATA[
            // Insert a column to the left of specified column
            private function addNewColumn(column:GridColumn):void
            {
                const newColumn:GridColumn = new GridColumn();
                newColumn.dataField = column.dataField;
                newColumn.headerText = column.headerText + "+";
                dataGrid.columns.addItemAt(newColumn, column.columnIndex);
            }
            
            // Remove the specified column
            private function removeColumn(column:GridColumn):void
            {
                dataGrid.columns.removeItemAt(column.columnIndex);
            }
        ]]>
    </fx:Script>
    
    <s:Panel title="Spark DataGrid Control Example which demonstrates the GridColumn visible property and dynamically adding and removing columns"
             width="75%" height="75%" 
             horizontalCenter="0" verticalCenter="0">
        
        <s:controlBarContent>
            <s:HGroup verticalAlign="baseline">
                <s:DropDownList id="ddl" prompt="Select" dataProvider="{dataGrid.columns}" labelField="headerText"/>
                <s:Label text="Visible:"/>
                <s:CheckBox selected="@{ddl.selectedItem.visible}" enabled="{ddl.selectedItem}"/>
                <s:Button label="Add" click="addNewColumn(ddl.selectedItem)" enabled="{ddl.selectedItem}"/>
                <s:Button label="Remove" click="removeColumn(ddl.selectedItem)" enabled="{ddl.selectedItem}"/>
            </s:HGroup>
        </s:controlBarContent>
        
        <s:DataGrid id="dataGrid" left="5" right="5" top="5" bottom="5">
            <s:columns>
                <s:ArrayList>
                    <s:GridColumn dataField="key" headerText="Key"/>
                    <s:GridColumn dataField="name" headerText="Name"/>
                    <s:GridColumn dataField="price" headerText="Price"/>
                    <s:GridColumn dataField="call" headerText="Call"/>
                </s:ArrayList>
            </s:columns>
            
            <s:ArrayCollection>
                <s:DataItem key="1000" name="Abrasive" price="100.11" call="false"/>
                <s:DataItem key="1001" name="Brush" price="110.01" call="true"/>
                <s:DataItem key="1002" name="Clamp" price="120.02" call="false"/>
                <s:DataItem key="1003" name="Drill" price="130.03" call="true"/>
                <s:DataItem key="1004" name="Epoxy" price="140.04" call="false"/>
                <s:DataItem key="1005" name="File" price="150.05" call="true"/>
                <s:DataItem key="1006" name="Gouge" price="160.06" call="false"/>
                <s:DataItem key="1007" name="Hook" price="170.07" call="true"/>
                <s:DataItem key="1008" name="Ink" price="180.08" call="false"/>
                <s:DataItem key="1009" name="Jack" price="190.09" call="true"/>             
            </s:ArrayCollection>
        </s:DataGrid>    
    </s:Panel>    
</s:Application>






[ X ]¿Por qué hay texto en inglés?
Cierto contenido de la Referencia de ActionScript 3.0 se muestra en inglés

No todo el contenido de la Referencia de ActionScript 3.0 se traduce a todos los idiomas. Si un elemento del lenguaje no se traduce, aparecerá en inglés. Por ejemplo, la clase ga.controls.HelpBox no está traducida en ningún idioma. Por lo tanto, en la versión en español de la referencia, la clase ga.controls.HelpBox aparecerá en inglés.