I have a QTableView and I want to validate user input. If user insert an invalid value in a cell of the QTableView, I want to highlight that cell and disable a QPushButton. How can I achieve this?...

I'm trying to apply validator in a line edit box in Qt 4.2 and it is not working: QDoubleValidator *haha= new QDoubleValidator(this); haha->setBottom(0.00); haha->setDecimals(2); haha-&g...

I am trying to use QValidator descendants (actually in PyQt5, but that shouldn't matter) to validate a series of line-edits. A small excerpt is: class IPv4(QWidget): def __init__(self): super(I...

QLineEdit has a signal QLineEdit::editingFinished that gets emitted when the user finished editing, for example by pressing enter. However if a validator or an input mask was set, then editingFinis...