Tooltip for each Qplieslice in a QPieSeries

Mary_M

Hi all,

My widget includes Qpieslices in a QpieSeries. I need to show the slices' values while hovering on them. I need a tooltip to show the value of the current slice that the mouse is hovering on it. Also, as long as the cursor is on a slice, the tooltip should constantly show its value.

I used different methods including the following code.

Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    setMouseTracking(true);
// some code
    QPieSlice *slice = new QPieSlice("Space", value);
//some code
    connect(slice, &QPieSlice::hovered, this, &Widget::explodeSlice);
//some code

In explodeSlice I do some works that is not related to the tooltip.

bool Widget::event (QEvent *ev)
{
        label_ev = new QLabel;
        label_ev->setWindowFlag(Qt::ToolTip);
        QHelpEvent *helpEvent = static_cast<QHelpEvent *>(ev);
        label_ev->move(helpEvent->globalPos());
        label_ev->setText(txt);
        label_ev->show();

        return QWidget::event(ev);
}

In this code, I have got two problems. First, a delay in the tooltip to pop up (I enabled mouse-tracking mode in my widget). Second, Where can I hide it? the tooltip remains on the slice and wherever I want to hide it in my code it does not work. No way to hide it.
Could anyone help me with this?

myk321

In terms of when to hide, Qt 6.6 has a different hovered() signature which includes a bool, which is set to true on mouse over and false on mouse exit. so:

void xyzObject::slotSliceHover(bool hovered){
    QPieSlice* hoverSlice = qobject_cast<QPieSlice*>(QObject::sender());
    if (hoverSlice != nullptr){
        if (hovered)
            hoverSlice->setExploded(true);
        else
            hoverSlice->setExploded(false);
    }
}