I use QBindable a lot in C++ classes that expose properties to QML.
My typical property implementation looks as follows:
Q_PROPERTY(qreal x BINDABLE getBindableX READ default FINAL)
//...
QProperty<qreal> m_X;
//...
CPropertyClass::getBindableX() const
{
return &m_X;
}
I got the idea to use "&m_X" to get the QBindable for a property from the
example in QObjectBindableProperty. And initially, I also used
QObjectBindableProperty via Q_OBJECT_BINDABLE_PROPERTY macro.
But once QML natively supported BINDABLE properties, I no longer saw any
advantage, and using QProperty produces less boilerplate.
So the usage of "&m_X" to get QBindable is documented for
QObjectBindableProperty, but only in the example, not in the docs specifically.
It feels a bit dirty to create a derived class via promotion from a base class.
And for QProperty, "&m_X" is not documented even in an example.
So the question is: Is it safe to use? Have I misunderstood something by
choosing QProperty over Q_OBJECT_BINDABLE_PROPERTY?
Robert Schimkowitsch
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