VC++6.0 Question about CObject

chanwing · 03-30-2005, 08:12 PM

I am a newbie for linux programming
I have a VC++ program porting to Linux problem
A program includes IMPLEMENT_DYNCREATE(), DECLARE_DYCREATE() and DECLARE_DYNAMIC().
But I don't know how to change it.
I had already searched some information in website.
I found out that for wxWindow.
I can replace DECLARE_DYCREATE() by DECLARE_DYNAMIC_CLASS() and DECLARE_DYNAMIC() by DECLARE_CLASS().
However, I use the Qt not wxWindow.
Then, how can I do?
In fact, I am not really understand about the IMPLEMENT_DYNCREATE(), DECLARE_DYCREATE() and DECLARE_DYNAMIC(), although I saw the msdn.
Can anyone know how to solve this problem?
Thank you very much

deiussum · 04-01-2005, 08:08 AM

Looking at MSDN, here is the description of IMPLEMENT_DYNCREATE

Quote:

Use this macro with the DECLARE_DYNCREATE macro to enable objects of CObject-derived classes to be created dynamically at run time. The framework uses this ability to create new objects dynamically, for example, when it reads an object from disk during serialization. Add the IMPLEMENT_DYNCREATE macro in the class implementation file.

If you use the DECLARE_DYNCREATE and IMPLEMENT_DYNCREATE macros, you can then use the RUNTIME_CLASS macro and the CObject::IsKindOf method to determine the class of your objects at run time.

If DECLARE_DYNCREATE is included in the class declaration, then IMPLEMENT_DYNCREATE must be included in the class implementation.

The only place I have ever seen these macros used is with MFC. If you are using Qt, all of your MFC classes will be replaced by Qt anyway, so the above macros probably aren't even really needed in your case.

I believe that internally MFC uses the methods declared by these macros to dynamically create instances of the doc/view classes. It's been awhile since I did much MFC programming, so I could be wrong on that.

chanwing · 04-06-2005, 06:57 PM

oh I see.............THank you very much deiussum.
that mean I no need to use them
but what kinds of methods or functions that can Qt replace of them? is it Qt doesn't have such kind of concept that I can ignore them?