class ClickableGraphicsView : public QGraphicsView
{
    Q_OBJECT
public:
    ClickableGraphicsView() : QGraphicsView() {}
    ClickableGraphicsView(QWidget *parent) : QGraphicsView(parent) {}

public:
    void mousePressEvent(QMouseEvent *event) {
        QGraphicsView::mousePressEvent(event);
        emit this->clicked(event);
    }
    void mouseDoubleClickEvent(QMouseEvent *event) {
        QGraphicsView::mouseDoubleClickEvent(event);
        emit this->clicked(event);
    }

signals:
    void clicked(QMouseEvent *event);
};

This seems to work great--I can successfully hook into the clicked signal. However, the tooltip does not appear anywhere.

QObject::connect(myClickableGraphicsView, &ClickableGraphicsView::clicked, [=](){
    // This is called successfully, logic runs fine.
    DoStuff();

    // This doesn't work!
    QToolTip::showText(QPoint(0, 0), "This doesn't work...");
});

When I setup the exact same code, but for a QPushButton, the tooltip does show up in the top-left corner, as expected.

QObject::connect(myPushButton, &QPushButton::clicked, [=](){
    QToolTip::showText(QPoint(0, 0), "This works!");
}

I tried some other techniques, like emitting a signal from these click handlers, but the same issue persists. I'm a bit out of ideas now. Is there something inherent about a QGraphicsView's event-handling system that would get in the way of the tooltip? Thanks!