GridColumn

Paket	spark.components.gridClasses
Klass	public class GridColumn
Arv	GridColumn EventDispatcher Object

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

MXML-syntax expanded

Dölj MXML-syntax

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"
  />

Visa exemplen

Relaterade API-element

spark.components.Grid
spark.components.DataGrid

Publika egenskaper

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	Egenskap		Definieras med
		columnIndex : int [skrivskyddad] The position of this column in the grid's column list, or -1 if this column's grid is null.	GridColumn
		constructor : Object En referens till klassobjektet eller konstruktorfunktionen för en given objektinstans.	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 [skrivskyddad] 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 [skrivskyddad] 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

Publika metoder

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	Metod		Definieras med
		GridColumn(columnName:String = null) Constructor.	GridColumn
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void Registrerar ett händelseavlyssnarobjekt för ett EventDispatcher-objekt så att avlyssnaren får meddelanden om händelser.	EventDispatcher
		dispatchEvent(event:Event):Boolean Skickar en händelse till händelseflödet.	EventDispatcher
		hasEventListener(type:String):Boolean Kontrollerar om EventDispatcher-objektet har några avlyssnare registrerade för en viss typ av händelse.	EventDispatcher
		hasOwnProperty(name:String):Boolean Anger om det finns en egenskap angiven för ett objekt.	Object
		isPrototypeOf(theClass:Object):Boolean Anger om en instans av klassen Object finns i prototypkedjan för objektet som anges som parameter.	Object
		itemToDataTip(item:Object):String Convert the specified data provider item to a column-specific datatip String.	GridColumn
		itemToLabel(item:Object):String Convert the specified data provider item to a column-specific String.	GridColumn
		itemToRenderer(item:Object):IFactory Convert the specified data provider item to a column-specific item renderer factory.	GridColumn
		propertyIsEnumerable(name:String):Boolean Anger om den angivna egenskapen finns och är uppräkningsbar.	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Tar bort en avlyssnare från EventDispatcher-objektet.	EventDispatcher
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Anger tillgänglighet för en dynamisk egenskap för slingåtgärder.	Object
		toLocaleString():String Returnerar det här objektets strängrepresentation, formaterad i enlighet med språkspecifika konventioner.	Object
		toString():String Returnerar det angivna objektets strängbeteckning.	Object
		valueOf():Object Returnerar det angivna objektets primitiva värde.	Object
		willTrigger(type:String):Boolean Kontrollerar om en händelseavlyssnare är registrerad för det här EventDispatcher-objektet eller något av dess överordnade objekt för den angivna händelsetypen.	EventDispatcher

Händelser

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	Händelse		Sammanfattning	Definieras med
		activate	[utsändningshändelse] Skickas när Flash Player eller AIR får operativsystemfokus och blir aktivt.	EventDispatcher
		deactivate	[utsändningshändelse] Skickas när Flash Player eller AIR förlorar operativsystemfokus och blir inaktivt.	EventDispatcher

Publika konstanter

	Konstant		Definieras med
		ERROR_TEXT : String = "unknown" [statisk] The return value for the itemToLabel() or itemToDataTip() method if resolving the corresponding property name (path) fails.	GridColumn

Egenskapsdetaljer

columnIndex

egenskap

columnIndex:int [skrivskyddad]

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen columnIndexChanged .

Implementering
public function get columnIndex():int

dataField

egenskap

dataField:String

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är null.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen dataFieldChanged .

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

Relaterade API-element

itemToLabel
labelFunction

dataTipField

egenskap

dataTipField:String

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är null.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen dataTipFieldChanged .

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

Relaterade API-element

dataTipFunction
itemToDataTip

dataTipFormatter

egenskap

dataTipFormatter:IFormatter

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är null.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen dataTipFormatterChanged .

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

Relaterade API-element

itemToDataTip
formatter

dataTipFunction

egenskap

dataTipFunction:Function

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är null.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen dataTipFunctionChanged .

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

Relaterade API-element

itemToDataTip
dataTipField

editable

egenskap

editable:Boolean

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är true.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen editableChanged .

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

formatter

egenskap

formatter:IFormatter

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är null.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen formatterChanged .

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

Relaterade API-element

itemToLabel
dataTipFormatter

grid

egenskap

grid:Grid [skrivskyddad]

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

Flash Player 10, AIR 2.5

The Grid object associated with this column.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen gridChanged .

Implementering
public function get grid():Grid

headerRenderer

egenskap

headerRenderer:IFactory

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är null.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen headerRendererChanged .

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

Relaterade API-element

headerText
IGridItemRenderer

headerText

egenskap

headerText:String

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen headerTextChanged .

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

imeMode

egenskap

imeMode:String

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är null.

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

Relaterade API-element

flash.system.IMEConversionMode

itemEditor

egenskap

itemEditor:IFactory

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är null.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen itemEditorChanged .

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

Relaterade API-element

spark.components.gridClasses.DefaultGridItemEditor
spark.components.gridClasses.GridItemEditor

itemRenderer

egenskap

itemRenderer:IFactory

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen itemRendererChanged .

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

Relaterade API-element

dataField
spark.skins.spark.DefaultGridItemRenderer
spark.components.gridClasses.GridItemRenderer

itemRendererFunction

egenskap

itemRendererFunction:Function

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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;
      }

Standardvärdet är null.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen itemRendererFunctionChanged .

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

labelFunction

egenskap

labelFunction:Function

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är null.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen labelFunctionChanged .

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

Relaterade API-element

itemToLabel
dataField

maxWidth

egenskap

maxWidth:Number

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är NaN.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen maxWidthChanged .

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

minWidth

egenskap

minWidth:Number

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är 20.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen minWidthChanged .

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

rendererIsEditable

egenskap

rendererIsEditable:Boolean

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är false.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen rendererIsEditableChanged .

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

resizable

egenskap

resizable:Boolean

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är true.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen resizableChanged .

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

showDataTips

egenskap

showDataTips:*

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är undefined.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen showDataTipsChanged .

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

Relaterade API-element

getShowDataTips

sortable

egenskap

sortable:Boolean

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är true.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen sortableChanged .

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

sortCompareFunction

egenskap

sortCompareFunction:Function

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är null.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen sortCompareFunctionChanged .

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

sortDescending

egenskap

sortDescending:Boolean

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är false.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen sortDescendingChanged .

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

sortField

egenskap

sortField:SortField [skrivskyddad]

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Implementering
public function get sortField():SortField

Relaterade API-element

spark.collections.SortField

visible

egenskap

visible:Boolean

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är true.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen visibleChanged .

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

width

egenskap

width:Number

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Standardvärdet är NaN.

Den här egenskapen kan användas som källan för databindning. När den här egenskapen ändras, skickas händelsen widthChanged .

Implementering
public function get width():Number
public function set width(value:Number):void

Konstruktordetaljer

()

Konstruktor

public function GridColumn(columnName:String = null)

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

Flash Player 10, AIR 2.5

Constructor.

Parametrar

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

Metoddetaljer

itemToDataTip

()

metod

public function itemToDataTip(item:Object):String

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Parametrar

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

Returnerar

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

itemToLabel

()

metod

public function itemToLabel(item:Object):String

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Parametrar

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

Returnerar

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

itemToRenderer

()

metod

public function itemToRenderer(item:Object):IFactory

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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.

Parametrar

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

Returnerar

IFactory — A column-specific item renderer factory for the specified dataProvider item.

Konstantdetaljer

ERROR_TEXT

Konstant

public static const ERROR_TEXT:String = "unknown"

Språkversion:

ActionScript 3.0

Produktversion:

Flex 4.5

Körningsmiljöversioner:

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: " ".

Relaterade API-element

itemToLabel
itemToDataTip

Exempel Så här använder du exemplet

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>

Juridiska meddelanden | Onlinesekretesspolicy

GridColumn - AS3 Flex

Paketx

Språkelement

Bilagor

Paket spark.components.gridClasses

columnIndex

dataField

dataTipField

dataTipFormatter

dataTipFunction

editable

formatter

grid

headerRenderer

headerText

imeMode

itemEditor

itemRenderer

itemRendererFunction

labelFunction

maxWidth

minWidth

rendererIsEditable

resizable

showDataTips

sortable

sortCompareFunction

sortDescending

sortField

visible

width

GridColumn

itemToDataTip

itemToLabel

itemToRenderer

ERROR_TEXT