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# TQIntValidator Class Reference

The TQIntValidator class provides a validator which ensures that a string contains a valid integer within a specified range. More...

`#include <ntqvalidator.h>`

Inherits TQValidator.

List of all member functions.

## Public Members

- TQIntValidator ( TQObject * parent, const char * name = 0 )
- TQIntValidator ( int minimum, int maximum, TQObject * parent, const char * name = 0 )
- ~TQIntValidator ()
- virtual TQValidator::State validate ( TQString & input, int & ) const
- void setBottom ( int )
- void setTop ( int )
- virtual void setRange ( int bottom, int top )
- int bottom () const
- int top () const

## Properties

- int bottom - the validator's lowest acceptable value
- int top - the validator's highest acceptable value

## Detailed Description

The TQIntValidator class provides a validator which ensures that a string contains a valid integer within a specified range.

Example of use:

        TQValidator* validator = new TQIntValidator( 100, 999, this );
        TQLineEdit* edit = new TQLineEdit( this );

        // the edit lineedit will only accept integers between 100 and 999
        edit->setValidator( validator );

Below we present some examples of validators. In practice they would normally be associated with a widget as in the example above.

        TQString str;
        int pos = 0;
        TQIntValidator v( 100, 999, this );

        str = "1";
        v.validate( str, pos );     // returns Intermediate
        str = "12";
        v.validate( str, pos );     // returns Intermediate

        str = "123";
        v.validate( str, pos );     // returns Acceptable
        str = "678";
        v.validate( str, pos );     // returns Acceptable

        str = "1234";
        v.validate( str, pos );     // returns Invalid
        str = "-123";
        v.validate( str, pos );     // returns Invalid
        str = "abc";
        v.validate( str, pos );     // returns Invalid
        str = "12cm";
        v.validate( str, pos );     // returns Invalid

The minimum and maximum values are set in one call with setRange() or individually with setBottom() and setTop().

See also TQDoubleValidator, TQRegExpValidator, and Miscellaneous Classes.

## Member Function Documentation

### TQIntValidator::TQIntValidator ( TQObject * parent, const char * name = 0 )

Constructs a validator called name with parent parent, that accepts all integers.

### TQIntValidator::TQIntValidator ( int minimum, int maximum, TQObject * parent, const char * name = 0 )

Constructs a validator called name with parent parent, that accepts integers from minimum to maximum inclusive.

### TQIntValidator::~TQIntValidator ()

Destroys the validator, freeing any resources allocated.

### int TQIntValidator::bottom () const

Returns the validator's lowest acceptable value. See the "bottom" property for details.

### void TQIntValidator::setBottom ( int )

Sets the validator's lowest acceptable value. See the "bottom" property for details.

### void TQIntValidator::setRange ( int bottom, int top )`[virtual]`

Sets the range of the validator to only accept integers between bottom and top inclusive.

### void TQIntValidator::setTop ( int )

Sets the validator's highest acceptable value. See the "top" property for details.

### int TQIntValidator::top () const

Returns the validator's highest acceptable value. See the "top" property for details.

### TQValidator::State TQIntValidator::validate ( TQString & input, int & ) const`[virtual]`

Returns Acceptable if the input is an integer within the valid range, Intermediate if the input is an integer outside the valid range and Invalid if the input is not an integer.

Note: If the valid range consists of just positive integers (e.g. 32 - 100) and input is a negative integer then Invalid is returned.

        int pos = 0;
        s = "abc";
        v.validate( s, pos ); // returns Invalid

        s = "5";
        v.validate( s, pos ); // returns Intermediate

        s = "50";
        v.validate( s, pos ); // returns Valid

Reimplemented from TQValidator.

## Property Documentation

### int bottom

This property holds the validator's lowest acceptable value.

Set this property's value with setBottom() and get this property's value with bottom().

See also setRange().

### int top

This property holds the validator's highest acceptable value.

Set this property's value with setTop() and get this property's value with top().

See also setRange().

This file is part of the TQt toolkit. Copyright © 1995-2007 Trolltech. All Rights Reserved.