Determination of properties to control the read-only mode

[collision#]

I'm a newbie in qt. And i started to read the book. In which i found out the following code.

class MyClass : public QObject {
Q_OBJECT
Q_PROPERTY(bool readOnly READ isReadOnly WRITE setReadOnly)
private:
 bool m_bReadOnly;
public:
 MyClass(QObject* pobj = 0) : QObject(pobj)
 , m_bReadOnly(false)
 {
 }
public:
 void setReadOnly(bool bReadOnly)
 {
 m_bReadOnly = bReadOnly;
 }
 bool isReadOnly() const
 {
 return m_bReadOnly;
 }
}

class MyClass : public QObject {
Q_OBJECT
Q_PROPERTY(bool readOnly READ isReadOnly WRITE setReadOnly)
private:
 bool m_bReadOnly;
public:
 MyClass(QObject* pobj = 0) : QObject(pobj)
 , m_bReadOnly(false)
 {
 }
public:
 void setReadOnly(bool bReadOnly)
 {
 m_bReadOnly = bReadOnly;
 }
 bool isReadOnly() const
 {
 return m_bReadOnly;
 }
}

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This code about "Determination of properties to control the read-only mode".
But i didn't understand it. And if someone know something about it. Plz,write down your answer. And where do i have to write this code in which file?

[anda_skoa]

Maybe you should first explain what you don't understand?

Declaration of the property? Any part of the implementation for the property? Usage of the property?

Cheers,
_