How do I get key pressed using event filtering on Android?

Nulik

Hi all,

the problem is that on Android, I am not getting the key events when the User is typing keys in virtual keyboard. I get them when the User presses 'Done' button and the keyboard is closed. (they come all at once, btw) But to implement some interactive behavior I have to get the keys as the user types them. So I tried to register an event filter:

bool EventFilter::eventFilter(QObject *watched, QEvent *event ) {
    //qDebug() << "eventfilter: " << event->type() ;
    if (!watched) {
        return false;
    }
    if (!event) {
        return false;
    }
    if (watched->objectName() == "myedit") {
        qDebug() << "Field textedit edited: type="<< event->type();
        if (event->type() == QEvent::InputMethod) {
            QInputMethodEvent *inputMethod = static_cast<QInputMethodEvent *>(event);
            qDebug() << "inputMethod received";
            if (!inputMethod) {
                   qDebug() << "Unable to cast correct type";
            } else {
                QString commit = inputMethod->commitString();
                qDebug() << "commit str:" << commit;
                QList<QInputMethodEvent::Attribute> list= inputMethod->attributes();
                qDebug() << "attributes:";
                for (int i=0;i<list.size();i++) {
                    QInputMethodEvent::Attribute attr=list.at(i);
                    QVariant var=attr.value;
                    qDebug() << i << ": type=" << attr.type << var.toUrl();
                }

            }
        }

    }
    return false;
}

So, now when I am typing keys in virtual keyboard I am getting these events:

MyApp: ../MyApp/eventfilter.cpp:18 (virtual bool EventFilter::eventFilter(QObject*, QEvent*)): Field textedit edited: type= QEvent::Type(InputMethodQuery)
D MyApp: ../MyApp/eventfilter.cpp:18 (virtual bool EventFilter::eventFilter(QObject*, QEvent*)): Field textedit edited: type= QEvent::Type(InputMethod)
D MyApp: ../MyApp/eventfilter.cpp:21 (virtual bool EventFilter::eventFilter(QObject*, QEvent*)): inputMethod received
D MyApp: ../MyApp/eventfilter.cpp:26 (virtual bool EventFilter::eventFilter(QObject*, QEvent*)): commit str: ""
D MyApp: ../MyApp/eventfilter.cpp:28 (virtual bool EventFilter::eventFilter(QObject*, QEvent*)): attributes:
D MyApp: ../MyApp/eventfilter.cpp:32 (virtual bool EventFilter::eventFilter(QObject*, QEvent*)): 0 : type= 1 QUrl("")
D MyApp: ../MyApp/eventfilter.cpp:32 (virtual bool EventFilter::eventFilter(QObject*, QEvent*)): 1 : type= 0 QUrl("")
D MyApp: ../MyApp/eventfilter.cpp:18 (virtual bool EventFilter::eventFilter(QObject*, QEvent*)): Field textedit edited: type= QEvent::Type(InputMethodQuery)
D MyApp: ../MyApp/eventfilter.cpp:18 (virtual bool EventFilter::eventFilter(QObject*, QEvent*)): Field textedit edited: type= QEvent::Type(InputMethodQuery)
D MyApp: ../MyApp/eventfilter.cpp:18 (virtual bool EventFilter::eventFilter(QObject*, QEvent*)): Field textedit edited: type= QEvent::Type(InputMethodQuery)

Unfortunately this method didn't get me expected results, because I was thinking the virtual keyboard would send QKeyEvent objects and I would easily get the key code, but it sends InputMethod and InputMethodQuery :(

QML code:

TextField {
                id: fld_field
                focus: true
                Layout.fillWidth: true
                placeholderText: "Field"
                property bool field_selected: false
                objectName: "myedit"
                inputMethodHints:  Qt.ImhNoPredictiveText
}
Is  there a way to get KeyEvent from `QInputMethodEvent` ?

Or, is it possible to get the key codes as the user types them in the virtual keyboard somehow ?

I am using Qt 5.11