Proper way to propagate MouseEvent from parent to the specific child

[bibasmall]

Hello, everyone!
I have a QQuickPaintedItem-based class, containing a collection of other QQuickPaintedItem-based items (it's a drawing field containing drawn elements, so each item in the collection is a child of the drawing field ). I want to propagate MouseEvent from parent to the exact child, let's say, the one stored in currentPrimitive_. What do I do to achieve my goal?

WorkingArea::WorkingArea(QQuickItem* parent) :
    QQuickPaintedItem(parent),
    primitives_{ new Line(this), new Line(this) } //to illustrate which collection the class has
{   
    setFiltersChildMouseEvents(true);
    setAcceptedMouseButtons(Qt::AllButtons);
}

void WorkingArea::mousePressEvent(QMouseEvent* e)
{
    //this code is called each time I click
    if (e->button() == Qt::RightButton)
    {
        //... some stuff
        e->accept();
        return;
    }
    e->ignore();
}

bool WorkingArea::childMouseEventFilter(QQuickItem* item, QEvent*)
{
   //this code is never called
    if(item != currentPrimitive_)
        return true;
    return false;
}

//...

Line::Line(QQuickItem* parent) :
    QQuickPaintedItem(parent)
{
    setAcceptedMouseButtons(Qt::AllButtons);
}

void Line::mousePressEvent(QMouseEvent* e)
{
  //this code is never called
}

[bibasmall]

As I understand it, the child should receive the event before the parent, but in my case, the child is deaf. I thought maybe the problem was the size of the child, so I set it equal to the parent size, but it didn't help. I can call mousePressEvent(e) directly for the child in the parent's overload, but it looks like a very bad design.

UPD: currentPrimitive_->setKeepMouseGrab(true); allows to pass the event to the child without ugly direct call of mousePressEvent(e) .