How to get signal key pressed on QT virtual keyboard and play a sound click track?

Question

in my QT application for embedded device , i want play a sound on key pressed event of the QML virtualkeyboard . Can I get this event? and How get it? I already have a class that play sound ( click effect) when a button was clicked that i use in the others qml pages

import QtQuick 2.7
import QtQuick.Controls 2.1
import QtQuick.Layouts 1.3
import QtQuick.VirtualKeyboard 2.1

Page{
    id: pag
    width:  1280
    height: 800
    background:  Rectangle { color: "black"} 
    TextField {
        id: txtName
        height: 200
        width:200
        anchors.horizontalcenter:parent.horizontalCenter
        font.family: "Arial
            font.pixelSize: 24
             placeholderText: "insert your text here"
            background: Rectangle {
                anchors.fill: parent
                color: "transparent"
            }
    }
    InputPanel {
        id: virtualkeyboard
        width: 0.95*parent.width
        anchors.bottom: parent.bottom
    }
}

Answer 1

You can create a class Mykeyfilter, it's a QObject class

then in your file .h you declare:

bool eventFilter(QObject *object, QEvent *event);

Then in your Mykeyfilter.cpp file you define eventFilter like this:

bool MykeyFilter::eventFilter(QObject *object, QEvent *event)
{
    switch(event->type())
    {
    case QEvent::KeyPress:
    case QEvent::KeyRelease:
        {
         //////call your sound class here that you want to play/////
         qDebug()<<"I have clicked"  //For testing
        }
    default:
        break;

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

    return QObject::eventFilter(object, event);

}

Also add in your main.cpp file:

#include "mytouchfilter.h"

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

    QQmlApplicationEngine engine;

    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));

    app.installEventFilter(new MykeyFilter());

    return app.exec();
}