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The QIntValidator class provides a validator which ensures that a string contains a valid integer within a specified range. More...
#include <qvalidator.h>
Inherits QValidator.
The QIntValidator class provides a validator which ensures that a string contains a valid integer within a specified range.
The validate() function returns Acceptable, Intermediate or Invalid. Acceptable means that the string is a valid integer within the specified range. Intermediate means that the string is a valid integer but is not within the specified range. Invalid means that the string is not a valid integer.
Example of use:
//... #include <qlineedit.h> #include <qvalidator.h> //... QIntValidator v( 0, 100, this ); QLineEdit* edit = new QLineEdit( this ); edit->setValidator( &v ); // the edit lineedit will only accept integers between 0 and 100
Below we present some examples of validators. In practice they would normally be associated with a widget as in the example above.
QString s; QIntValidator v( 0, 100, this ); // a validator that will only accept integers between 0 and 100 s = "10"; v.validate( a, 0 ); // Returns Acceptable s = "35"; v.validate( a, 0 ); // Returns Acceptable s = "105"; v.validate( a, 0 ); // Returns Intermediate s = "-763"; v.validate( a, 0 ); // Returns Intermediate s = "abc"; v.validate( a, 0 ); // Returns Invalid; s = "12v"; v.validate( a, 0 ); // Returns Invalid;
The minimum and maximum values are set in one call with setRange() or individually with setBottom() and setTop().
See also QDoubleValidator and QRegExpValidator.
Returns the validator's smallest acceptable value. See the "bottom" property for details.
Sets the validator's smallest acceptable value. See the "bottom" property for details.
Sets the validator's largest acceptable value. See the "top" property for details.
Returns the validator's largest acceptable value. See the "top" property for details.
s = "35"; v.validate( a, 0 ); // Returns Acceptable s = "105"; v.validate( a, 0 ); // Returns Intermediate s = "abc"; v.validate( a, 0 ); // Returns Invalid;
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.
Reimplemented from QValidator.
This property holds the validator's smallest acceptable value.
Set this property's value with setBottom() and get this property's value with bottom().
See also setRange().
This property holds the validator's largest acceptable value.
Set this property's value with setTop() and get this property's value with top().
See also setRange().
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Copyright © 2001 Trolltech | Trademarks | Qt version 3.0.0-beta1-beta1
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