Qt实现编辑框失去焦点隐藏功能

connect(ui.btnSave, &QPushButton::clicked, this, &QMyWidget::OnBnClickedSave);

class CustomLineEdit : public QLineEdit
{
	Q_OBJECT

public:
	CustomLineEdit(QWidget *parent);
	~CustomLineEdit();
signals:
	void Msg_SendCustomLineEditFocusOut(); //失去焦点消息
protected:
	void focusOutEvent(QFocusEvent *event) override;
};

CustomLineEdit::CustomLineEdit(QWidget *parent)
	: QLineEdit(parent)
{
}

CustomLineEdit::~CustomLineEdit()
{
}

void CustomLineEdit::focusOutEvent(QFocusEvent *event)
{
	emit Msg_SendCustomLineEditFocusOut();
	QLineEdit::focusOutEvent(event);
}

if (event->type() == QEvent::MouseButtonDblClick)
{
    //此刻，响应双击消息后，隐藏该控件，显示编辑框、和保存按钮
    m_labTitle->hide();
    m_editTitle->show();
    m_editTitle->clear();
    m_btnSave->show();
}

m_labTitle->show();
m_editTitle->hide();
m_btnSave->hide();

QString qTitle = m_editTitle->text();
m_labTitle->setText(qTitle); //标题文本设置
m_labTitle->show();

m_editTitle->hide();
m_btnSave->hide();