[Development] The future of QProperty and QBindable

[André Somers]

On 3/7/25 12:48, Schimkowitsch Robert wrote:
>> There is "Q_PROPERTY(qreal x MEMBER m_x NOTIFY xChanged)" for the
>> really simple cases.
>>
>> With that you don't need to write any accessors at all. Not even the bindable
>> accessor.
>>
> That neither does the change comparison, nor will it automatically notify about changes.
It will.
> You'd have to code both manually. I don't see a major improvement. Also, I guess this forces me to make the members public.
> Not really an alternative.

It won't, unless you need direct access. I just use a small wrapper 
macro around Q_PROPERTY to get rid of the boilerplate in some places 
where I have lots of trivial properties. It declares and defines the the 
member (and initializes that), getter & setter and notification signal 
all in one go. Do we love macros? No. Are they still useful sometimes? 
Absolutely.

I am surprised by this proposal to back out QProperty essentially from 
Qt. It was supposed to be one of the big selling points with Qt6. It was 
rushed in at that point (and there were discussions about that), and now 
it turns out it's not well enough thought-out to actually work, if I may 
paraphrase Ulf.

Cheers,

André

>
> Kind regards
>
> Robert
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