restrict Input QSpinBox

Question

I have a QSpinBox and I want it to only accept positive natural numbers. This works fine, until I enter a dot .

If I enter 234235.23456and change the focus to some other spinbox, the value is changed to 23423523456.

So I am looking for a way to ignore everything behind the .

Is this possible without subclassing QSpinBox?

use a comma? Qt respects localization settings (IIRC) so that may help — ratchet freak, Dec 03 '14 at 10:43
Probably no, but QDoubleSpinBox with setDecimals(0) might be your workaround. :p Otherwise, just reimplement [this](http://doc-snapshot.qt-project.org/qt5-5.4/qspinbox.html#textFromValue). — László Papp, Dec 03 '14 at 10:47
I first tried the QDoubleSpinBox with setDecimals(0) but it acts the same way — liquid.pizza, Dec 03 '14 at 10:59
the Spinbox only takes digits from `0-9` and if `setDecimals(0)` it takes `.`. — liquid.pizza, Dec 04 '14 at 09:54

score 2 · Accepted Answer · answered Dec 04 '14 at 10:40

2

I found a fix for my porblem:

QDoubleSpinBox * box = new QDoubleSpinBox();

box->setDecimals(0);
box->setSingleStep(1.0);

box->findChild<QLineEdit*>()->setValidator(new QRegExpValidator(QRegExp(QString("^[1-9][0-9]*$"))));

answered Dec 04 '14 at 10:40

liquid.pizza

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restrict Input QSpinBox

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