다른 클래스의 lineEdit 연결 문 작성 방법

Question

다른 클래스에서 선언되는 lineEdit의 신호와 슬롯은 어떻게 만들 수 있습니까 ?? LineEdit은 Peakdetechtion 클래스에서 선언되었으며 peaksettingform에서 신호와 슬롯을 만들고 싶습니다. 어떻게해야합니까?

Answer 1

QLineEdit 중 하나는 외부에서 액세스 할 수 (일반 또는 취득)해야하거나 관심있는 신호를 전달해야합니다. (불완전하고 아주 더러운)

접근 버전

class Peakdetechtion { // horrible name 
public: 
    QLineEdit* getLineEdit() { return m_lineEdit; } // don't do it 

private: 
    QLineEdit* m_lineEdit; 
}; 

class Peaksettingform : public QObject { //horrible name 
    Q_OBJECT 
public: 
    Peaksettingform(Peakdetechtion *p, QObject *parent = 0) 
    : QObject(parent) { 
    // you can do this from outside and replace 'this' with a pointer to a Peaksettingform object 
    connect(p->getLineEdit(), SIGNAL(textChanged(const QString &)), this, SLOT(handleText(const QString &))); 
} 

public slots: 
    void handleText(const QString &); 
}; 

을 신호 전달

class Peakdetechtion : public QObject { // horrible name 
Q_OBJECT 
public: 
    Peakdetechtion() { 
    m_lineEdit = new QLineEdit(); // should have a parent but i am lazy 
    connect(m_lineEdit, SIGNAL(textChanged(const QString&)), this, SIGNAL(leTextChanged(const QString&))); 
    } 

signals: 
    void leTextChanged(const QString &); 

private: 
    QLineEdit* m_lineEdit; 
}; 

class Peaksettingform : public QObject { //horrible name 
    Q_OBJECT 
public: 
    Peaksettingform(Peakdetechtion *p, QObject *parent = 0) 
    : QObject(parent) { 
    // you can do this from outside and replace 'this' with a pointer to a Peaksettingform object 
    connect(p, SIGNAL(leTextChanged(const QString &)), this, SLOT(handleText(const QString &))); 
} 

public slots: 
    void handleText(const QString &); 
};