QWizard, QLineEdit and PasswordEchoOnEdit oh my.

In a QWizard, pressing enter should advance the wizard (to next page or submit) on Windows platform.

On Windows, when a QLineEdit set with PasswordEchoOnEdit has focus inside a QWizardPage and the user presses enter instead of the form submitting the QLineEdit is erased.

This can be seen in the following example, just take off the EventFilter to disable the workaround :

#include <QtGui>

class KeyPressEater : public QObject

{ Q_OBJECT public: KeyPressEater(QObject *parent = 0 ); protected: bool eventFilter(QObject *obj, QEvent *event); }; KeyPressEater::KeyPressEater(QObject *parent): QObject(parent) { }

bool KeyPressEater::eventFilter(QObject *obj, QEvent *event)
{
if (event->type() == QEvent::KeyPress) {
QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
if ((keyEvent->key() == Qt::Key_Enter)||(keyEvent->key() == Qt::Key_Return))

{ QLineEdit *le = static_cast<QLineEdit * >(obj); le->setReadOnly(true); qApp->sendEvent(le->parent(),event); return true; }

}
return false;
}

class MyWidget: public QWizard

{ public: MyWidget(QWidget *parent = 0); }; class MyPage : public QWizardPage { Q_OBJECT public: MyPage(); QLineEdit *m_le; QLineEdit *m_le2; virtual bool isComplete() const; public slots: void TextChanged(); }

;

MyWidget::MyWidget(QWidget *parent) : QWizard(parent)
{
setWindowTitle("Support Tester");
}

MyPage::MyPage() : QWizardPage()
{
KeyPressEater *keyPressEater = new KeyPressEater(this);

QLabel *label = new QLabel("This wizard will help you register your copy "
"of Super Product Two.");
label->setWordWrap(true);

QVBoxLayout *layout = new QVBoxLayout;
layout->addWidget(label);

m_le = new QLineEdit("password");
m_le->setEchoMode(QLineEdit::PasswordEchoOnEdit);

m_le->installEventFilter(keyPressEater);

connect(m_le, SIGNAL(textChanged(const QString &)), this, SLOT(TextChanged()));
m_le2 = new QLineEdit("username");
layout->addWidget(m_le2);
layout->addWidget(m_le);
setLayout(layout);
}

bool MyPage::isComplete() const
{
return !m_le->text().isEmpty();
}

void MyPage::TextChanged()
{
emit completeChanged();
}

#include "main.moc"

int main(int argc, char *argv[])
{
QApplication app(argc, argv);

QWizard wizard;
MyPage page;
wizard.addPage(&page);
wizard.show();

return app.exec();
}