checking QLineEdit for input.

[thomasGl]

Hello guys. I made QLineedit objects. i want to add them and output the result but only if all objects have a number . How can i check if all my objects have a number only than output the result.

[JonB]

@thomasGl
By looking in each one to see whether it has a number there and only proceeding if they all do. QString Class has a number of methods (e.g. toInt(), toDouble()) for determining if a string is a valid "number" (depending on what your definition of a number is) which take a bool *ok parameter to find out whether the string was valid. If you only want numbers to be entered into your edits consider adding a QValidator or changing to a QSpinBox-type widget?

[thomasGl]

yes i want only numbers.

[JonB]

@thomasGl
Well that does not advance the conversation. Anyway you have the answer above. If you only accept integers or floating points it's easiest to start with a QSpinbox widget instead of a QLineEdit.

[thomasGl]

yes thx it helps me