Plain Edit text "" return int from Qstring"

Amine Djeddi

Hi Qties !! im trying to change the Variable "a" from PlainTextEdit !! but it's doent work
any suggestions please ?

if (ui.bitwiseAND->isChecked())

		{
			int a ;
			QString g = ui.plainTextEdit_2->toPlainText();
			a = g.toInt();

			medianBlur(HidedSrc, Mblurred, a);
			namedWindow("Mblurred", WINDOW_NORMAL); 
		}

SGaist

Hi,

What does ui.plainTextEdit_2 contain ?

Amine Djeddi

@SGaist

it's empty !!

SGaist

And you are expecting toInt to return what if your string is empty ?

Amine Djeddi

@SGaist
i set a = 3 , it's works ... you opened my eyes thank you .... i'm so newby

SGaist

toInt has a boolean parameter that you can use to validate that the conversion was successful.

On a related note, if you want to have an numerical input there, why not use something more appropriate like a QSpinBox ? That way you don't even have to deal with conversion.