How to stop click propagation in QGraphicsScene without making ItemIsSelectable?

deleted385

Besides three slices, QGraphicsItem, I've an ellipse and a text in the scene:

ellipse = new QGraphicsEllipseItem();
ellipse->setBrush(Qt::white);
ellipse->setPen(Qt::NoPen);
text = new QGraphicsTextItem(ellipse);

This ellipse with text is added/removed in the scene dynamically on hoverEvents of slices. Without any modification in the constructor of PieView, QGraphicsView, this is what happens when mouse is over the ellipse or clicked:

so even though the ellipse is opaque, slices beneath the ellipse receives hover...Event and when I click on the ellipse, those slices receive mousePressEvent. If I change the definition of the ellipse like this:

ellipse = new QGraphicsEllipseItem();
ellipse->setBrush(Qt::white);
ellipse->setPen(Qt::NoPen);
ellipse->setAcceptHoverEvents(true);
ellipse->setAcceptedMouseButtons(Qt::AllButtons);
ellipse->setFlag(QGraphicsItem::ItemStopsClickFocusPropagation);
text = new QGraphicsTextItem(ellipse);

slices beneath the ellipse don't receive hover...Event as long as the mouse is over the ellipse BUT they receive mousePressEvent:

One way that I've found works is make the ellipse selectable like this:

ellipse->setFlags(QGraphicsItem::ItemIsSelectable);`

BUT that introduces unnecessary complicacy in code. Is there any other way/flag to stop click propagation when I click on the opaque ellipse?

JonB

@Emon-Haque
I saw also your other post about this. I don't claim to know what is going on, but I would suggest you look at the eventFilter on QGraphicsScene/View. Everything ought to go through there, so you can debug to see what is going on and (presumably) filter events to stop propagation etc.

deleted385

@JonB, It's hard to control the selection mechanism of scene. Depending on where one clicks, scene automatically selects/deselects item. So instead of using the setSelected/isSelected in Slice, I've creted isChecked/setChecked to control the movements of Slice and removed ItemIsSelectable flag from Slice constructor. In PieView made these changes:

scene->setSceneRect(0,0,200,200);
ellipse = new QGraphicsEllipseItem();
ellipse->setBrush(Qt::white);
ellipse->setPen(Qt::NoPen);
ellipse->setAcceptHoverEvents(true);
ellipse->setFlag(QGraphicsItem::ItemIsSelectable);
text = new QGraphicsTextItem(ellipse);
text->setAcceptHoverEvents(false);

the weird movement of slices, when mouse first entered, was solved by setting setSceneRect. With these changes, drawings and slice movements are almost perfect. A rectangular dashed border becomes visible when I click on the ellipse:

That's weird! In some places I've seen people suggested to subclass the ellipse and override the paint BUT that's a lot for such a simple thing. Is there any other way to remove that border around the ellipse?