| Package | mx.validators |
| Class | public class NumberValidator |
| Inheritance | NumberValidator  Validator EventDispatcher Object |
minValue and maxValue),
is an integer (specified by domain),
is non-negative (specified by allowNegative),
and does not exceed the specified precision.
The validator correctly validates formatted numbers (e.g., "12,345.67")
and you can customize the thousandsSeparator and
decimalSeparator properties for internationalization.
MXML Syntax
Hide MXML Syntax
The <mx:NumberValidator> tag
inherits all of the tag attributes of its superclass,
and adds the following tag attributes:
Show MXML Syntax
<mx:NumberValidator
allowNegative="true|false"
decimalPointCountError="The decimal separator can only occur once."
decimalSeparator="."
domain="real|int"
exceedsMaxError="The number entered is too large."
integerError="The number must be an integer."
invalidCharError="The input contains invalid characters."
invalidFormatCharsError="One of the formatting parameters is invalid."
lowerThanMinError="The number entered is too small."
maxValue="NaN"
minValue="NaN"
negativeError="The number may not be negative."
precision="-1"
precisionError="The number entered has too many digits beyond the decimal point."
separationError="The thousands separator must be followed by three digits."
thousandsSeparator=","
/>
| Property | Defined by | ||
|---|---|---|---|
| allowNegative : Boolean
Specifies whether negative numbers are permitted.
| NumberValidator | ||
 | constructor : Object
A reference to the class object or constructor function for a given object instance.
| Object | |
| decimalPointCountError : String
Error message when the decimal separator character occurs more than once.
| NumberValidator | ||
| decimalSeparator : String
The character used to separate the whole
from the fractional part of the number.
| NumberValidator | ||
| domain : String
Type of number to be validated.
| NumberValidator | ||
| enabled : Boolean
Setting this value to
false will stop the validator
from performing validation. | Validator | |
| exceedsMaxError : String
Error message when the value exceeds the
maxValue property. | NumberValidator | ||
| integerError : String
Error message when the number must be an integer, as defined
by the
domain property. | NumberValidator | ||
| invalidCharError : String
Error message when the value contains invalid characters.
| NumberValidator | ||
| invalidFormatCharsError : String
Error message when the value contains invalid format characters, which means that
it contains a digit or minus sign (-) as a separator character,
or it contains two or more consecutive separator characters.
| NumberValidator | ||
| listener : Object
Specifies the validation listener.
| Validator | |
| lowerThanMinError : String
Error message when the value is less than
minValue. | NumberValidator | ||
| maxValue : Number
Maximum value for a valid number.
| NumberValidator | ||
| minValue : Number
Minimum value for a valid number.
| NumberValidator | ||
| negativeError : String
Error message when the value is negative and the
allowNegative property is false. | NumberValidator | ||
| precision : int
The maximum number of digits allowed to follow the decimal point.
| NumberValidator | ||
| precisionError : String
Error message when the value has a precision that exceeds the value defined
by the precision property.
| NumberValidator | ||
| property : String
A String specifying the name of the property
of the
source object that contains
the value to validate. | Validator | |
| prototype : Object
[static]
A reference to the prototype object of a class or function object.
| Object | |
| required : Boolean
If
true, specifies that a missing or empty
value causes a validation error. | Validator | |
| requiredFieldError : String
Error message when a value is missing and the
required property is true. | Validator | |
| separationError : String
Error message when the thousands separator is in the wrong location.
| NumberValidator | ||
| source : Object
Specifies the object containing the property to validate.
| Validator | |
| thousandsSeparator : String
The character used to separate thousands
in the whole part of the number.
| NumberValidator | ||
| trigger : IEventDispatcher
Specifies the component generating the event that triggers the validator.
| Validator | |
| triggerEvent : String
Specifies the event that triggers the validation.
| Validator | |
| Method | Defined by | ||
|---|---|---|---|
|
Constructor.
| NumberValidator | ||
|
addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registers an event listener object with an EventDispatcher object so that the listener
receives notification of an event.
| EventDispatcher | |
|
Dispatches an event into the event flow.
| EventDispatcher | |
|
Checks whether the EventDispatcher object has any listeners registered for a specific type
of event.
| EventDispatcher | |
|
Called automatically by the MXML compiler when the Validator
is created using an MXML tag.
| Validator | |
|
Removes a listener from the EventDispatcher object.
| EventDispatcher | |
|
Sets the availability of a dynamic property for loop operations.
| Object | |
|
Returns the string representation of the specified object.
| Object | |
|
Performs validation and optionally notifies
the listeners of the result.
| Validator | |
|
[static]
Invokes all the validators in the
validators Array. | Validator | |
|
[static]
Convenience method for calling a validator
from within a custom validation function.
| NumberValidator | ||
|
Returns the primitive value of the specified object.
| Object | |
|
Checks whether an event listener is registered with this EventDispatcher object or any of
its ancestors for the specified event type.
| EventDispatcher | |
| Method | Defined by | ||
|---|---|---|---|
|
addListenerHandler():void
Sets up all of the listeners for the
valid and invalid
events dispatched from the validator. | Validator | |
|
Override of the base class
doValidation() method
to validate a number. | NumberValidator | ||
|
Returns the Object to validate.
| Validator | |
|
Returns a ValidationResultEvent from the Array of error results.
| Validator | |
|
Returns
true if value is null. | Validator | |
|
removeListenerHandler():void
Disconnects all of the listeners for the
valid and invalid
events dispatched from the validator. | Validator | |
| allowNegative | property |
public var allowNegative:Boolean
Specifies whether negative numbers are permitted.
Valid values are true or false.
The default value is true.
| decimalPointCountError | property |
public var decimalPointCountError:StringError message when the decimal separator character occurs more than once.
The default value is "The decimal separator can only occur once.".
| decimalSeparator | property |
public var decimalSeparator:String
The character used to separate the whole
from the fractional part of the number.
Cannot be a digit and must be distinct from the
thousandsSeparator.
The default value is ".".
| domain | property |
public var domain:String
Type of number to be validated.
Permitted values are "real" and "int".
The default value is "real".
| exceedsMaxError | property |
public var exceedsMaxError:String
Error message when the value exceeds the maxValue property.
The default value is "The number entered is too large.".
| integerError | property |
public var integerError:String
Error message when the number must be an integer, as defined
by the domain property.
The default value is "The number must be an integer.".
| invalidCharError | property |
public var invalidCharError:StringError message when the value contains invalid characters.
The default value is The input contains invalid characters.".
| invalidFormatCharsError | property |
public var invalidFormatCharsError:StringError message when the value contains invalid format characters, which means that it contains a digit or minus sign (-) as a separator character, or it contains two or more consecutive separator characters.
The default value is "One of the formatting parameters is invalid.".
| lowerThanMinError | property |
public var lowerThanMinError:String
Error message when the value is less than minValue.
The default value is "The number entered is too small.".
| maxValue | property |
public var maxValue:NumberMaximum value for a valid number. A value of NaN means there is no maximum.
The default value is NaN.
| minValue | property |
public var minValue:NumberMinimum value for a valid number. A value of NaN means there is no minimum.
The default value is NaN.
| negativeError | property |
public var negativeError:String
Error message when the value is negative and the
allowNegative property is false.
The default value is "The number may not be negative.".
| precision | property |
public var precision:int
The maximum number of digits allowed to follow the decimal point.
Can be any nonnegative integer.
Note: Setting to 0 has the same effect
as setting domain to "int".
A value of -1 means it is ignored.
The default value is -1.
| precisionError | property |
public var precisionError:StringError message when the value has a precision that exceeds the value defined by the precision property.
The default value is "The number entered has too many digits beyond the decimal point.".
| separationError | property |
public var separationError:StringError message when the thousands separator is in the wrong location.
The default value is "The thousands separator must be followed by three digits.".
| thousandsSeparator | property |
public var thousandsSeparator:String
The character used to separate thousands
in the whole part of the number.
Cannot be a digit and must be distinct from the
decimalSeparator.
The default value is ",".
| NumberValidator | () | constructor |
public function NumberValidator()Constructor.
| doValidation | () | method |
protected override function doValidation(value:Object):Array
Override of the base class doValidation() method
to validate a number.
You do not call this method directly; Flex calls it as part of performing a validation. If you create a custom Validator class, you must implement this method.
Parametersvalue:Object — Object to validate.
|
Array —
An Array of ValidationResult objects, with one ValidationResult
object for each field examined by the validator.
|
| validateNumber | () | method |
public static function validateNumber(validator:NumberValidator, value:Object, baseField:String):ArrayConvenience method for calling a validator from within a custom validation function. Each of the standard Flex validators has a similar convenience method.
Parametersvalidator:NumberValidator — The NumberValidator instance.
|
|
value:Object — A field to validate.
|
|
baseField:String — Text representation of the subfield
specified in the value parameter.
For example, if the value parameter specifies value.number,
the baseField value is "number".
|
Array —
An Array of ValidationResult objects, with one ValidationResult
object for each field examined by the validator.
|
See also
<?xml version="1.0" encoding="utf-8"?>
<!-- Simple example to demonstrate the NumberValidator. -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script>
import mx.controls.Alert;
</mx:Script>
<mx:NumberValidator source="{age}" property="text" integerError="Enter Integer value"
minValue="18" maxValue="50" domain="int"
trigger="{myButton}" triggerEvent="click"
valid="Alert.show('Validation Succeeded!');"/>
<mx:Panel title="NumberValidator Example" width="75%" height="75%"
paddingTop="10" paddingLeft="10" paddingRight="10" paddingBottom="10">
<mx:Form>
<mx:FormItem label="Enter an age between 18 and 50: ">
<mx:TextInput id="age" width="100%"/>
</mx:FormItem>
<mx:FormItem >
<mx:Button id="myButton" label="Validate" />
</mx:FormItem>
</mx:Form>
</mx:Panel>
</mx:Application>