Why and when to use Q_PROPERTY

[Vanir]

Hello All,

I am new to QT and am learning it for my present job so I apologize for any dum questions.

I have read the information on the Qt Assistant regarding the macro Q_PROPERTY. Although Assistant gives the 'syntax' it does not give the why and when to insert such properties into a class derived from QObject.

What criteria should I use to decide to create / insert properties in my class designs derived from QObject?

Does the Qt framework make use of them?

The same questions are asked of the use of dynamic properties.

Thanks,

Vanir

[jpn]

I have read the information on the Qt Assistant regarding the macro Q_PROPERTY. Although Assistant gives the 'syntax' it does not give the why and when to insert such properties into a class derived from QObject.
In Q_PROPERTY (http://doc.trolltech.com/4.3/qobject.html#Q_PROPERTY) docs, there's a link to more verbose article: Qt's Property System (http://doc.trolltech.com/4.3/properties.html)

[mchara]

Hi,
there's no dum questions ;)
rather not asking is dummy

Q_PROPERTY is required whne developing QtDesigner plugins(that extends designer by new custom widgets).
Q_PROPERTY macro adds informations that allow designer to add a property t property editor (and change its value at design time).

It can be omitted in other cases, so u may ignore it until first QtDesigner plugin writing.

[jacek]

Properties are also useful in scriptable objects.

[Vanir]

Hi Everyone,

Thank you for your hard-earnt knowledge.

I am sure to post again.

Vanir