TapAndHoldGesture sender object name

[giovanni.foiani]

Hi,

I'm handling TapAndHoldGesture in my Qt Application (version 4.7.4), the gesture is correctly fired and I handle it in the following way:

bool RecipeList::event(QEvent *event)
{
    if (event->type() == QEvent::Gesture) {
        return gestureEvent(static_cast<QGestureEvent*>(event));
    }
    return QWidget::event(event);
}
 
bool RecipeList::gestureEvent(QGestureEvent *event)
{
    if (QGesture *swipe = event->gesture(Qt::SwipeGesture))
        swipeTriggered(static_cast<QSwipeGesture*>(swipe));
    else if (QGesture *tapAndHold = event->gesture(Qt::TapAndHoldGesture))
        tapAndHoldTriggered(static_cast<QTapAndHoldGesture*>(tapAndHold));
    return true;
}
 
void RecipeList::tapAndHoldTriggered(QTapAndHoldGesture* tapAndHold)
{
    if (tapAndHold->state() == Qt::GestureFinished) {
        QLOG_DEBUG() << Q_FUNC_INFO;
    }
}

bool RecipeList::event(QEvent *event)
{
    if (event->type() == QEvent::Gesture) {
        return gestureEvent(static_cast<QGestureEvent*>(event));
    }
    return QWidget::event(event);
}

bool RecipeList::gestureEvent(QGestureEvent *event)
{
    if (QGesture *swipe = event->gesture(Qt::SwipeGesture))
        swipeTriggered(static_cast<QSwipeGesture*>(swipe));
    else if (QGesture *tapAndHold = event->gesture(Qt::TapAndHoldGesture))
        tapAndHoldTriggered(static_cast<QTapAndHoldGesture*>(tapAndHold));
    return true;
}

void RecipeList::tapAndHoldTriggered(QTapAndHoldGesture* tapAndHold)
{
    if (tapAndHold->state() == Qt::GestureFinished) {
        QLOG_DEBUG() << Q_FUNC_INFO;
    }
}

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I need to extract the event sender object name, I tried sender()->objectName() but it fails.
How can I make it work?

Thanks

Giovanni

[giovanni.foiani]

I solved using event filter on widget on which I want to catch TapAndHoldGesture.

I installed event filter in this way: (buttonWidget is the widget that fires TapAndHoldGesture)

buttonWidget->grabGesture(Qt::TapAndHoldGesture);
buttonWidget->installEventFilter(this);

buttonWidget->grabGesture(Qt::TapAndHoldGesture);
buttonWidget->installEventFilter(this);

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And then the handling code:

bool RecipeList::eventFilter(QObject *obj, QEvent *event)
{
    if (event->type() == QEvent::Gesture) {
        return gestureEvent(obj, static_cast<QGestureEvent*>(event));
    }
    return QWidget::eventFilter(obj, event);
}
 
bool RecipeList::gestureEvent(QObject *obj, QGestureEvent *event)
{
    if (QGesture *swipe = event->gesture(Qt::SwipeGesture))
        swipeTriggered(obj, static_cast<QSwipeGesture*>(swipe));
    else if (QGesture *tapAndHold = event->gesture(Qt::TapAndHoldGesture))
        tapAndHoldTriggered(obj, static_cast<QTapAndHoldGesture*>(tapAndHold));
    return true;
}
 
void RecipeList::tapAndHoldTriggered(QObject *obj, QTapAndHoldGesture* tapAndHold)
{
    if (tapAndHold->state() == Qt::GestureFinished) {
        QLOG_DEBUG() << obj->objectName();
    }
}

bool RecipeList::eventFilter(QObject *obj, QEvent *event)
{
    if (event->type() == QEvent::Gesture) {
        return gestureEvent(obj, static_cast<QGestureEvent*>(event));
    }
    return QWidget::eventFilter(obj, event);
}

bool RecipeList::gestureEvent(QObject *obj, QGestureEvent *event)
{
    if (QGesture *swipe = event->gesture(Qt::SwipeGesture))
        swipeTriggered(obj, static_cast<QSwipeGesture*>(swipe));
    else if (QGesture *tapAndHold = event->gesture(Qt::TapAndHoldGesture))
        tapAndHoldTriggered(obj, static_cast<QTapAndHoldGesture*>(tapAndHold));
    return true;
}

void RecipeList::tapAndHoldTriggered(QObject *obj, QTapAndHoldGesture* tapAndHold)
{
    if (tapAndHold->state() == Qt::GestureFinished) {
        QLOG_DEBUG() << obj->objectName();
    }
}

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Giovanni

[JandunCN]

Thanks,it is helpful to me.