QSpinBox validator problem

[batileon]

In the past(QT3), I can use setValidator() for QSpinBox
for example,

QRegExpValidator *rv = new QRegExpValidator( rx, 0);
spinBox->setValidator( rv );

However I found that it is not possible to do so when porting to QT4.
Can anyone tell me what to do?
thanks

[mchara]

Hi,
one possibility is to
override

QValidator::State QAbstractSpinBox::validate ( QString & input, int & pos ) const [virtual]

and use validator inside.

Second approach is to get lineedit of a spinbox

QLineEdit * QAbstractSpinBox::lineEdit () const [protected]
an setValidator there

void QLineEdit::setValidator ( const QValidator * v )

[axe]

mchara

lineEdit() function is protected.
Do you mean it's not possible to set validator for spin box without inheriting it?
I'm already using QSpinBox class objects everywhere, how should I set validator for those objects?

[wysota]

If you're using Designer, you can use the "Promote to" tool available from context menu of items dropped on forms. If you're not using Designer then simply replace instances of QSpinBox with proper subclasses. However I would go for reimplementing validate() rather than trying tricks with spinbox's lineEdit.