QLineEdit::editingFinished() doesn't work if QLineEdit is empty?

[mireiner]

ChrisW67,

It was the validator. The last parameter of QRegularExpression had to be changed from {1,4} to {0,4} to allow empty input:

QValidator *validator;
validator = new QRegularExpressionValidator(QRegularExpression("[A-Z 1-5]{1,4}"), this);
validator = new QRegularExpressionValidator(QRegularExpression("[A-Z 1-5]{0,4}"), this); // works

QValidator *validator;
validator = new QRegularExpressionValidator(QRegularExpression("[A-Z 1-5]{1,4}"), this);
validator = new QRegularExpressionValidator(QRegularExpression("[A-Z 1-5]{0,4}"), this); // works

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Thank you very much for your help!