How to restrict a QSpinBox with following restrictions

[Sriu1]

1. It should not take 01,002.. It should take 0 or 1 or 2 i.e 0 should not be prefixed with natural numbers.
2. It should not take 00000000000000000000000000000000

[mrjj]

Hi
You can use
http://doc.qt.io/qt-5/qspinbox.html#validate
to check if input is "legal"

[Sriu1]

Can you send a snippet please.The document is hard to understand

[mrjj]

@Sriu1

Hi, its protected so you will need to subclass for it.
Maybe others have better idea/easier.

Did you try with valueChanged() signal ?

It accepts ints and 001 is also valid int, so it might be a bit hard to get rid of.

[Sriu1]

Hi @mrjj
In designer mode I have a QSpinBox when I call mainwindow.show() and enter value in QSpinBox it should not take

1. 000000000000000
   and
2. 01,002,.. It should take 0,1,2
   Can you suggest?

[J.Hilk]

@Sriu1 a 0 is only valid as a intermetiate state, as soon as you press return or the QSpinbox looses focus, the display inside the QSpinbox should correct itself to a number bewteen 1-9 before the comma or a 0 if its the only digit

[Sriu1]

@J-Hilk Is there any way to restrict the user from not entering 00000000000000000000000.

[SGaist]

Hi,

What is the problem with you users entering such a big number of zeros ?