Keybord shortcuts for hidden widgets / actions

[Scope]

In menubar I have action "Show menu" which is checkable. For that action I have also shortcut and it works great only when menu is visible. When menubar is not visible then shortcut does not work.

How I can implement shortcuts which will work with not visible / hidden actions in menubar?
Thanks,

---

Added after 41 minutes:

Ok, I found solution - reimplement parent QWidget::keyPressEvent(QKeyEvent *event);

void MyWidget::keyPressEvent(QKeyEvent *event)
{
    if( event->modifiers() == Qt::ControlModifier ) {
        if( event->key() == Qt::Key_M )
            // show my menubar
}

void MyWidget::keyPressEvent(QKeyEvent *event)
{
    if( event->modifiers() == Qt::ControlModifier ) {
        if( event->key() == Qt::Key_M )
            // show my menubar
}

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but now second question - is it the best solution for that purpose?

[anda_skoa]

For a global shortcut I would go for a global event filter, to be sure you catch it independent of which widget has focus.

Cheers,
_

[Scope]

anda_skoa you mean something like that:

main.cpp

int main(int argc, char *argv[])
{
 
    QApplication app(argc, argv);
    MyWidget w;
    app.installEventFilter(&w);
    w.show();
 
    return app.exec();
}

int main(int argc, char *argv[])
{
    
    QApplication app(argc, argv);
    MyWidget w;
    app.installEventFilter(&w);
    w.show();

    return app.exec();
}

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event filter in MyWidget

bool MyWidget::eventFilter(QObject *object, QEvent *event)
{
    if ( event->type() == QEvent::KeyPress) {
        QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
        if( keyEvent->modifiers() == Qt::ControlModifier ) {
            switch (keyEvent->key()) {
            case Qt::Key_M:
                ui->actionShow_menu->setChecked(!ui->actionShow_menu->isChecked());
                return true;
            case Qt::Key_Left:
                prevPage();
                return true;
            case Qt::Key_Right:
                nextPage();
                return true;
            }
 
            return false;
        }
    }
 
    return QObject::eventFilter(object, event);
}

bool MyWidget::eventFilter(QObject *object, QEvent *event)
{
    if ( event->type() == QEvent::KeyPress) {
        QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
        if( keyEvent->modifiers() == Qt::ControlModifier ) {
            switch (keyEvent->key()) {
            case Qt::Key_M:
                ui->actionShow_menu->setChecked(!ui->actionShow_menu->isChecked());
                return true;
            case Qt::Key_Left:
                prevPage();
                return true;
            case Qt::Key_Right:
                nextPage();
                return true;
            }

            return false;
        }
    }

    return QObject::eventFilter(object, event);
}

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This way is correctly?

Next question, in eventFilter If I want to have "global event handler" I do not need check which object send current event, I am right? So I do not need line:

if( object == someWidget ) {
    // task
}

if( object == someWidget ) {
    // task
}

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Thanks,

[anda_skoa]

Yes, that looks good, though your switch() should have a default.

And indeed, a global shortcut should work independent of which widget the key would have originally been sent to.

Cheers,
_