Q_PROPERTY with private setter

Question

I have an QObject with properties accessible from QML. Something like:

Class C : public QObject {
Q_OBJECT
public:
explicit C(QObject * parent = nullptr);
Q_PROPERTY(QString ro_text READ ro_text WRITE setRo_text NOTIFY ro_textChanged)
};

Is it possible to make the setter(setRo_text) "private", so the property cannot by modified from QML, but can still be set from C++ code(inside the class)?

Answer 1

if you don't want it to be modified from QML then don't declare the WRITE, and create a method that every time the property changes it emits the signal, the setter method can be public or private but it can't be accessed in QML

class C: public QObject{
    Q_OBJECT
    Q_PROPERTY(QString ro_text READ ro_text NOTIFY ro_textChanged)
public:
    C(QObject *parent=nullptr): QObject(parent){

    }
    QString ro_text() const {
        return m_ro_text;
    }
Q_SIGNALS:
    void ro_textChanged();
private:
    void setRo_text(const QString & text){
        if(m_ro_text == text)
            return;
        m_ro_text = text;
        Q_EMIT ro_textChanged();
    }
    QString m_ro_text;
};