Get certain property of a QLineEdit via eventFilter to clipboard

Question

I'm attempting to create a QLineEdit element whose text will be automatically copied to the clipboard when clicked.

I've created the following eventFilter to capture the click event and installed it on the applicable elements:

bool MainWindow::eventFilter(QObject *watched, QEvent *event)
{
    if(event->type() == QEvent::MouseButtonPress)
    {
        qDebug("TEST");
        return true;
    }
    else
    {
        return false;
    }
}

What would be the best way from here to gather the data I need from the object to pass to the clipboard function?

Answer 1

Use the QClipboard class. You can get your application's clipboard using qApp->clipboard() and then set the text from the QLineEdit:

bool MainWindow::eventFilter(QObject *watched, QEvent *event)
{
    if(event->type() == QEvent::MouseButtonPress)
    {
        auto watched_as_lineEdit = qobject_cast<QLineEdit*>(watched);
        if (watched_as_lineEdit != nullptr) {
            qApp->clipboard()->setText(watched_as_lineEdit->text());
            return true;
        }
    }

    return QMainWindow::eventFilter(watched, event); // change for actual parent class if different from QMainWindow
}