Q_PROPERTY Macro - QObject Properties

Q_PROPERTY gives you an alternative way to access data members albeit at a speed trade off.

You make a property read only by omitting a WRITE function and add a signal when it updates by adding a NOTIFY tag.

The generic syntax is as follows:

// Basic example. NB no semi-colon
Q_PROPERTY(type name READ getFunction WRITE setFunction NOTIFY signalFunction)

// Additional properties but not useful for the context of this course
(RESET resetFunction DESIGNABLE bool SCRIPTABLE bool STORED bool)

A example of a class that implements Q_PROPERTY

class Person : public QObject{
    Q_OBJECT

    Q_PROPERTY(QString name READ getName WRITE setName NOTIFY namechange)

    public:
        Person(QObject* parent = 0);
        void setName(QString s);
        QString getName();

    signals:
        void nameChange();

    private:
        QString name;

}