Qt 如何从点击的QGraphicsItem获取信息？

其思想是，用户点击一个形状，该形状的信息显示在表格上。如果用户选择该形状（将鼠标拖动到该形状上），则效果良好。我正试图修改此代码以执行该操作，但并不幸运。这就是我在选择模式下所做的：

我打电话到：

void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);

释放鼠标后，我将更新数据：

//enter the mode for selecting   
if(theMode == SelectObject){

 if (this->items().isDetached()){

//we check if the object is selected
    if (this->selectedItems().isEmpty()){
        qDebug() << "not selected";
        isSelected = false;
        return;
    }

 //we get a list of the shapes
    QList<QGraphicsItem*> stackOfShapes = this->items();

 //we get index of selected shape
    QGraphicsItem *selected = this->selectedItems().first();
    int indexOfShape = stackOfShapes.indexOf(selected);

 //we see which shape is (For a Rectangle)

    switch (selected->type()) {

        case 346:
        {
        updateDataOfRect();
        }
            break;
    }

}

如果单击形状未选中，如何执行此操作

我试图修改mousePressEvent中形状的子类：

if (event->button() == Qt::MouseButton::LeftButton) {
        this->setSelected(true);
}

有人能帮忙找到解决办法吗

谢谢

QList<QGraphicsItem *> QGraphicsView::items(const QPoint &pos) const

QList<QGraphicsItem *> QGraphicsView::items(const QPoint &pos) const

void CustomView::mousePressEvent(QMouseEvent *event) {
    qDebug() << "There are" << items(event->pos()).size()
             << "items at position" << mapToScene(event->pos());
}