plugin accessing data from qApp

[itpenguin]

Plugins are normally made for accessing plugin methods in the main program.

Now I have an application, where the plugin needs to call a method from the main program.
How is this done?
I have a working solution using QMetaObject::invoke(), but using this is rather complex.

Is there an easier way to call an application method from within the plugin?

[SGaist]

Hi,

Can you give more information about that plugin wanting to access qApp ?

[itpenguin]

OK, the problem is solved.
I have to declare methods in the main application to be virtual, if they are to be called from inside the lib. That's because of dynamic linking of the address.

[SGaist]

Can you explain what you mean by that ?

Method called from libraries don't need to be virtual at all unless you want the library users to be able to re-implement them.

[itpenguin]

If I call a method of an class of the main application form inside the plugin, I get a runtime error, because the address of the method is not found.

[SGaist]

Did you load the plugin properly ?