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How to catch mouse click in QDoubleSpinbox

  • Hello I have a QDoubleSpinbox and I want to make it so that when a user clicks its value, it automatically selects the value so the user can type a new value to it.

    I used the following event filter. But during my test, the function is only called when I click on the main framework (anywhere outside those spinboxes). What should I do?

    bool MainWindow::eventFilter(QObject* obj, QEvent* event)
        if (event->type() == QEvent::MouseButtonPress){
            if (obj == ui->input){
                return true;
            if (obj == ui->error){
                return true;
        return QObject::eventFilter(obj, event);

  • @MasterBlade
    I don't know, but would it work if you sub-classed the QDoubleSpinbox and overrode its eventFilter() instead? You can have an eventFilter() on every QWidget (and then it is self-contained/standalone, does not rely on writing it in container), you don't have to have it on just your QMainWindow or whatever.

  • Lifetime Qt Champion


    You likely want to apply that to the QLineEdit used in the QDoubleSpinBox. See the lineEdit method to get it.

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