MainWindow Button

[waynew]

Sorry JD2000, I probably didn't state the problem clearly.

The pushbutton works fine. I just want it clicked when the Enter key is hit.
This is automatic on the default button in a dialog, but not a mainwindow.

Here is what I have tried but it does nothing:

ui->pbSave->installEventFilter(this);
 
bool MainWindow::eventFilter(QObject *object, QEvent *event)
 {
     if (object == ui->pbSave && event->type() == QEvent::KeyPress) {
         QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
         if (keyEvent->key() == Qt::Key_Enter) {
             ui->pbSave->click();
             return true;
         } else
             return false;
     }
     return false;
 }

ui->pbSave->installEventFilter(this);

bool MainWindow::eventFilter(QObject *object, QEvent *event)
 {
     if (object == ui->pbSave && event->type() == QEvent::KeyPress) {
         QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
         if (keyEvent->key() == Qt::Key_Enter) {
             ui->pbSave->click();
             return true;
         } else
             return false;
     }
     return false;
 }

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I am probably not understanding the event filter doc correctly.
Any help appreciated.

[spirit]

here is work example

Test::Test(QWidget *parent)
	: QWidget(parent)
{
	QVBoxLayout *vbl = new QVBoxLayout(this);
    m_pbTest = new QPushButton(tr("test"));
    m_pbTest->installEventFilter(this);
    vbl->addWidget(m_pbTest);
    connect(m_pbTest, SIGNAL(clicked()), SLOT(testClicked()));
}
 
bool Test::eventFilter(QObject *o, QEvent *e)
{
    if (o == m_pbTest && e->type() == QEvent::KeyPress) {
        QKeyEvent *ke = static_cast<QKeyEvent *>(e);
        if (ke->key() == Qt::Key_Enter || ke->key() == Qt::Key_Return)
            m_pbTest->click();
    }
    return QWidget::eventFilter(o, e);
}
 
void Test::testClicked()
{
    qDebug() << Q_FUNC_INFO << "clicked";
}

Test::Test(QWidget *parent)
	: QWidget(parent)
{
	QVBoxLayout *vbl = new QVBoxLayout(this);
    m_pbTest = new QPushButton(tr("test"));
    m_pbTest->installEventFilter(this);
    vbl->addWidget(m_pbTest);
    connect(m_pbTest, SIGNAL(clicked()), SLOT(testClicked()));
}

bool Test::eventFilter(QObject *o, QEvent *e)
{
    if (o == m_pbTest && e->type() == QEvent::KeyPress) {
        QKeyEvent *ke = static_cast<QKeyEvent *>(e);
        if (ke->key() == Qt::Key_Enter || ke->key() == Qt::Key_Return)
            m_pbTest->click();
    }
    return QWidget::eventFilter(o, e);
}

void Test::testClicked()
{
    qDebug() << Q_FUNC_INFO << "clicked";
}

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[numbat]

If you want the button clicked on enter when it has the focus, you can just call setAutoDefault with true. If you want it clicked when pressing enter while it doesn't have the focus, you will have to intercept events for the QMainWindow rather than the button. You can do this by overriding the event function for QMainWindow.

bool MainWindow::event(QEvent *event)
{
    if (event->type() == QEvent::KeyPress)
    {
        QKeyEvent *ke = static_cast<QKeyEvent *>(event);
        if (ke->key() == Qt::Key_Enter || ke->key() == Qt::Key_Return)
        {
            qDebug() << "click";
            ui->pbSave->click();
            return true;
        }
    }
    return QMainWindow::event(event);
}

bool MainWindow::event(QEvent *event)
{
    if (event->type() == QEvent::KeyPress)
    {
        QKeyEvent *ke = static_cast<QKeyEvent *>(event);
        if (ke->key() == Qt::Key_Enter || ke->key() == Qt::Key_Return)
        {
            qDebug() << "click";
            ui->pbSave->click();
            return true;
        }
    }
    return QMainWindow::event(event);
}

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[waynew]

Thanks folks. Now I understand the possible approaches to the problem much better.

Working fine now.

Thanks to all of the experienced ones who are willing to help us learners!