I can't get the area of touch point in Ubuntu 20.04

zhuhongguo

11/28/23, 9:23 AM

I can't get the area of touch point in Ubuntu 20.04, but I can get the area of touch point in Ubuntu 16.04; What shall I do? Previous methods are as follows:

bool GraphicsView::viewportEvent(QEvent *event){ QEvent::Type type = event->type();

if(type == QEvent::TouchBegin || type == QEvent::TouchUpdate
   || type == QEvent::TouchEnd){

    QTouchEvent *pTouchEvent = static_cast<QTouchEvent*>(event);
    QList<QTouchEvent::TouchPoint> touchPoints = pTouchEvent->touchPoints();

    int nId = 0;
    QColor penColor;

    foreach (const QTouchEvent::TouchPoint tp, touchPoints) {

        qDebug() << "id" << tp.id() << "触摸区域" << tp.ellipseDiameters() << "触摸点" << tp.pos();
    }
    return true;
}

return QGraphicsView::viewportEvent(event);

}

0 + 5

desktop-environments

HuHa

11/28/23, 9:29 AM

Check the Qt versions on both systems and if that feature is available in both versions.

guiverc

11/28/23, 9:37 AM

You mention two Ubuntu operating systems (20.04 & 16.04), but have tagged the question as being about Ubuntu Touch (the phone OS) so please correct or clarify your question. Ubuntu-Touch is a UBports OS that currently is still 16.04 based (the 20.04 port isn't yet completed).

zhuhongguo

11/29/23, 1:36 AM

The Qt versions on both systems are same.

guiverc

11/29/23, 1:50 AM

The Qt5 versions in *xenial* and *focal* vary greatly and are not the same.

zhuhongguo

11/29/23, 5:01 AM

We use Qt5.15.2 on ubuntu (20.04 & 16.04.

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EN: I can't get the area of touch point in Ubuntu 20.04

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