Wt::WDoubleValidator Class Reference

A validator for validating floating point user input. More...

#include <Wt/WDoubleValidator>

Inherits Wt::WValidator.

List of all members.

Public Member Functions

 WDoubleValidator (WObject *parent=0)
 Creates a new double validator that accepts any double.
 WDoubleValidator (double minimum, double maximum, WObject *parent=0)
 Creates a new double validator that accepts double within the given range.
double bottom () const
 Returns the bottom of the valid double range.
void setBottom (double bottom)
 Sets the bottom of the valid double range.
double top () const
 Returns the top of the valid double range.
void setTop (double top)
 Sets the top of the valid double range.
virtual void setRange (double bottom, double top)
 Sets the range of valid doubles.
virtual State validate (WString &input) const
 Validates the given input.
virtual void createExtConfig (std::ostream &config) const
 Provides Ext-compatible config options for client-side validation.
void setInvalidNotANumberText (const WString &text)
 Sets the message to display when the input is not a number.
WString invalidNotANumberText () const
 Returns the message displayed when the input is not a number.
void setInvalidTooSmallText (const WString &text)
 Sets the message to display when the number is too small.
WString invalidTooSmallText () const
 Returns the message displayed when the number is too small.
void setInvalidTooLargeText (const WString &text)
 Sets the message to display when the number is too large.
WString invalidTooLargeText () const
 Returns the message displayed when the number is too large.

Protected Member Functions

std::string javaScriptValidate (const std::string &jsRef) const
 Creates a Javascript expression that validates the input.

Detailed Description

A validator for validating floating point user input.

This validator checks whether user input is a double in the pre-defined range.

Usage example:

 Wt::WLineEdit *lineEdit = new Wt::WLineEdit(this);
 Wt::WDoubleValidator *validator = new Wt::WDoubleValidator();
 lineEdit->setValidator(validator);
 lineEdit->setText("13.42");

Member Function Documentation

WString Wt::WDoubleValidator::invalidNotANumberText (  )  const

Returns the message displayed when the input is not a number.

See also:
setInvalidNotANumberText(const WString&)
WString Wt::WDoubleValidator::invalidTooLargeText (  )  const

Returns the message displayed when the number is too large.

See also:
setInvalidTooLargeText(const WString&)
WString Wt::WDoubleValidator::invalidTooSmallText (  )  const

Returns the message displayed when the number is too small.

See also:
setInvalidTooSmallText(const WString&)
std::string Wt::WDoubleValidator::javaScriptValidate ( const std::string &  jsRef  )  const [protected, virtual]

Creates a Javascript expression that validates the input.

The JavaScript expression should evaluate to an object with two fields: a boolean valid, and a message that indicates the problem if not valid.

Return an empty string if you are not provide the client-side validation.

See also:
inputFilter()

Reimplemented from Wt::WValidator.

void Wt::WDoubleValidator::setBottom ( double  bottom  ) 

Sets the bottom of the valid double range.

The default value is the minimum double value.

void Wt::WDoubleValidator::setInvalidNotANumberText ( const WString text  ) 

Sets the message to display when the input is not a number.

The default value is "Must be a number."

void Wt::WDoubleValidator::setInvalidTooLargeText ( const WString text  ) 

Sets the message to display when the number is too large.

Depending on whether bottom() and top() are real bounds, the default message is "The number must be between {1} and {2}" or "The number must be smaller than {2}".

void Wt::WDoubleValidator::setInvalidTooSmallText ( const WString text  ) 

Sets the message to display when the number is too small.

Depending on whether bottom() and top() are real bounds, the default message is "The number must be between {1} and {2}" or "The number must be larger than {1}".

void Wt::WDoubleValidator::setTop ( double  top  ) 

Sets the top of the valid double range.

The default value is the maximum double value.

WValidator::State Wt::WDoubleValidator::validate ( WString input  )  const [virtual]

Validates the given input.

The input is considered valid only when it is blank for a non-mandatory field, or represents a double within the valid range.

Reimplemented from Wt::WValidator.


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