Language Version : | ActionScript 3.0 |
Product Version : | Flex 4.5 |
Runtime Versions : | Flash Player 9, AIR 1.1 |
The
ISortField
interface defines the interface for classes that
are used with
ISort
classes, to provide the sorting information
required to sort the specific fields or property in a collection view.
arraySortOnOptions:int
[read-only]
Language Version : | ActionScript 3.0 |
Product Version : | Flex 4.5 |
Runtime Versions : | Flash Player 9, AIR 1.1 |
This helper property is used internally by the findItem()
and sort()
methods. Other uses of this property are not
supported.
Returns -1 if this ISortField shouldn't be used by the Sort
class to sort the field (there is no compareFunction or no name). Otherwise, returns a bitmask of sort options..
Implementation public function get arraySortOnOptions():int
compareFunction:Function
Language Version : | ActionScript 3.0 |
Product Version : | Flex 4.5 |
Runtime Versions : | Flash Player 9, AIR 1.1 |
The function that compares two items during a sort of items for the
associated collection. If you specify a compareFunction
property in an ISort object, Flex ignores any
compareFunction
properties of the ISort's ISortField
objects.
The compare function must have the following signature:
function myCompare(a:Object, b:Object):int
This function returns the following values:
- -1, if
a
should appear before b
in
the sorted sequence
- 0, if
a
equals b
- 1, if
a
should appear after b
in the
sorted sequence
Implementation public function get compareFunction():Function
public function set compareFunction(value:Function):void
descending:Boolean
Language Version : | ActionScript 3.0 |
Product Version : | Flex 4.5 |
Runtime Versions : | Flash Player 9, AIR 1.1 |
Specifies whether this field should be sorted in descending
order.
The default value is false
(ascending).
Implementation public function get descending():Boolean
public function set descending(value:Boolean):void
name:String
Language Version : | ActionScript 3.0 |
Product Version : | Flex 4.5 |
Runtime Versions : | Flash Player 9, AIR 1.1 |
The name of the field to be sorted.
Implementation public function get name():String
public function set name(value:String):void
numeric:Object
Language Version : | ActionScript 3.0 |
Product Version : | Flex 4.5 |
Runtime Versions : | Flash Player 9, AIR 1.1 |
Specifies that if the field being sorted contains numeric
(number/int/uint
) values, or string representations of numeric values,
the comparator use a numeric comparison.
This property is used by SortField
class in case custom compare
function is not provided.
If this property is true
, the built-in numeric compare
function is used. Each of data items is cast to a
Number()
function before the comparison.
If this property is false
, the built-in string compare
function is used. Each of data items is cast to a
String()
function before the comparison.
If this property is null
, the first data item
is introspected to see if it is a number or string and the sort
proceeds based on that introspection.
The default value is null
.
Implementation public function get numeric():Object
public function set numeric(value:Object):void
usingCustomCompareFunction:Boolean
[read-only]
Language Version : | ActionScript 3.0 |
Product Version : | Flex 4.5 |
Runtime Versions : | Flash Player 9, AIR 1.1 |
True if this ISortField
uses a custom comparator function.
Implementation public function get usingCustomCompareFunction():Boolean
See also
public function initializeDefaultCompareFunction(obj:Object):void
Language Version : | ActionScript 3.0 |
Product Version : | Flex 4.5 |
Runtime Versions : | Flash Player 9, AIR 1.1 |
A helper function called by the Sort
class to set the
default comparison function to perform a comparison based on
one of three things: whether or not a custom compare function has
been set, the data type for the specified field or the the value of the
numeric property. If the the numeric
property is true,
then a numeric comparison will be performed when sorting.
Parameters
| obj:Object — The object that contains the data. If the field name has
been set with the name property, then the name will be used to access
the data value from this object. Otherwise the object itself will
be used as the data value.
|
public function reverse():void
Language Version : | ActionScript 3.0 |
Product Version : | Flex 4.5 |
Runtime Versions : | Flash Player 9, AIR 1.1 |
Reverse the criteria for this sort field.
If the field was sorted in descending order, for example, sort it
in ascending order.
NOTE: An ICollectionView
does not automatically
update when the ISortFields
are modified; call its
refresh()
method to update the view.
Mon Jul 9 2012, 07:18 PM -04:00