How to user input an infinity value to a QSpinBox?

yashi95

hello,
I don't want to restrict the spin Box in pyside2 using QtDesginer.
Is it possible in qt?

J.Hilk

@yashi95 that depends, do you want to allow one less than infinity or one more? And what value should that internally represent ? as int32/64 ?

jsulm

@J-Hilk said in How to user input an infinity value to a QSpinBox?:

one less than infinity or one more?

:-)

yashi95

I didn't get the meaning of "one less than infinity or one more?" I want to display 1000 means int32.
Just I don't want to restrict with any number, it will take 1 to any number.
I tried in QtDesigner but it will allow a maximum value of 1000000000 till this.

J.Hilk

@yashi95 I mean, you may get your Spinbox display to show ∞ instead of a number, but you're and always will be limited to the minimum of an int32_t and the maximum of int 32_t

-> -2147483648 and 2147483647

yashi95

@J-Hilk As you told to set values -2147483648 and 2147483647. But in qt is not possible it seems.

J.Hilk

@yashi95 I don't use the designer, I'm going of the documentation
https://doc.qt.io/qt-5/qspinbox.html#maximum-prop

that says, the min/max is a signed int -> -2147483648 should be the minimum 🤔

Edit
a quick test:

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QSpinBox sb;
    sb.setMinimum(std::numeric_limits<int32_t>::min());
    sb.setMaximum(std::numeric_limits<int32_t>::max());
    sb.show();
    sb.resize(200,50);

    qDebug() << sb.minimum();
    qDebug() << sb.maximum();

    return  app.exec();
}

shows that it is possible, seems like there's an input filter in the designer, that limits the number of digits you can but into it,
Seems like a bug

Edit 2
https://bugreports.qt.io/browse/QTCREATORBUG-25526

JonB

@J-Hilk , @yashi95 too
According to me (Linux, Creator 4.11.0). It is not any limit on the number of characters/digits you can type. Rather, there seems to just be one special case:

max: 2147483647 => works
max: 2147483648 => does not allow you to enter this, correct
min: -2147483647 =>works
min: -2147483648 => does not allow you to enter this, wrong

! So it's only 1 out, on the minimum only. Which hardly seems like a show-stopper!

I have not entered this into your Qt bug report, I don't know if you want me to or you want to check/do it yourself?

J.Hilk

oh,

I tested other 10 digit numbers, but I failed to make them smaller than -2147483647
-214748366X doset allow anything for x, which makes sense !

You can add to the report if you like, it's going nowhere anyway.
You may have noticed that the assigned person removed himself and the ticket is now "unassigned" and I doubt it will ever be touch upon again

Umer

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