将鼠标悬停在儿童身上QGraphicsItem也会使父项悬停

Question

我在QGraphicsScene上有三个项目，比如＆＃34; 1＆＃34;，＆＃34; 2＆＃34;和＆＃34; 3＆＃34;。 ＆＃34; 3＆＃34;是＆＃34; 2＆＃34;的孩子。 setAcceptHoverEvents在所有这些上启用。

问题是当我将项目悬停在＆＃34; 3＆＃34; item＆＃34; 2＆＃34;即使鼠标位置位于2的边界内，也会被标记。如何独立悬停子项？

#include "GraphicsView.h"

#include <QGraphicsScene>
#include <QGraphicsRectItem>
#include <QGraphicsSceneHoverEvent>

class GraphicsRectItem: public QGraphicsRectItem
{
public:
    GraphicsRectItem(qreal x, qreal y, qreal w, qreal h, const QString& label, 
                     QGraphicsItem* parent = nullptr)
        : QGraphicsRectItem(x, y, w, h, parent)
        , m_label(new QGraphicsSimpleTextItem(label, this))
    {
        setBrush(Qt::white);
        setAcceptHoverEvents(true);
    }

protected:
    void hoverEnterEvent(QGraphicsSceneHoverEvent* event)
    {
        setBrush(Qt::lightGray);
        QGraphicsItem::hoverEnterEvent(event);
    }

    void hoverLeaveEvent(QGraphicsSceneHoverEvent* event)
    {
        setBrush(Qt::white);
        QGraphicsItem::hoverLeaveEvent(event);
    }

protected:
    QGraphicsSimpleTextItem* m_label;
};

GraphicsView::GraphicsView(QWidget* parent)
    : QGraphicsView(parent)
    , m_scene(new QGraphicsScene(this))
    , m_rect1(new GraphicsRectItem(0, 0, 100, 100, " 1"))
    , m_rect2(new GraphicsRectItem(0, 0, 100, 100, " 2"))
    , m_rect3(new GraphicsRectItem(0, 0, 100, 100, " 3", m_rect2))
{
    m_scene->addItem(m_rect1);
    m_scene->addItem(m_rect2);

    m_rect2->setPos(40, 40);
    m_rect3->setPos(40, 40);

    setScene(m_scene);
}

GraphicsView::~GraphicsView()
{}