How to listen to QTouchEvent originating from a precision touch pad?

reylo-cu

I have a Windows 10 laptop with a precision touchpad. I have been unsuccessfully trying to listen to QTouchEvent's originating from the touchpad. This is my code (Qt 5.9.4_patch2):

#include <QApplication>
#include "MyWindow.h"

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

    MyWindow window;
    window.show();

    return app.exec();
}

//MyWindow.h
#pragma once

#include <QtWidgets>

class MyWindow : public QWindow
{
    Q_OBJECT

public: 
    MyWindow();

protected:
    void touchEvent(QTouchEvent* e) override;
    bool event(QEvent* e) override;
};

//MyWindows.cpp
#include "MyWindow.h"

MyWindow::MyWindow()
    : QWindow()
{
}

void MyWindow::touchEvent(QTouchEvent* e)
{
    qDebug() << "Touch!!";
}

bool MyWindow::event(QEvent* e)
{
    qWarning() << e->type(); 
    return QWindow::event(e);
}

The touch events never get triggered. I tried this too, but didn't work.

Any ideas?

jsulm

@reylo-cu touchEvent is for touch events on a touch screen, not touch-pad. Touch pads work like a mouse. You should get mouse*Event() when using laptop touch pad.

reylo-cu

@jsulm QTouchEvent class has the method *QTouchDevice QTouchEvent::device(). The device type QTouchDevice::TouchPad is supported by QT. So If I understand QTouchEvent documentation correctly, it should be possible.
Access to the multitouch data from multi-touch-capable precision touchpads is possible in Windows via a low-level Window's API (e.g. GetRawInputData()). I was guessing/hoping that QTouchEvent was a higher-level, multiplatform solution on top of this.