Writing to form fields from other files than mainwindow.h

Uberlinc

Hi,

I'm trying to populating some form fields.
If I reference them from mainwindow.cpp (which includes "ui.mailwindow.h") it can see them fine and works okay.

I wish to reference them from another file of my own creation.
I've added #include "ui_mainwindow.h" and #include "mainwindow.h" but it totally fails to recognise them.

Can someone tell me where I'm going wrong here?

Thanks.

JonB

@Uberlinc
You are trying to doing the wrong thing, and in the wrong way :)

Never #include ui_....h file into any file other than the .cpp of the same name. Regard it as a "private" include for that file only.
If you do want to access another class/form, #include "thatclass.h" only. You must then go into thatclass.{cpp,h} and export whatever you need to access explicitly, by writing appropriate public methods to access just what is needed from there.
However, you should never do that in the case of mainwindow. No other class/form should know about, or need to know about, anything in your main window. Indeed, other classes/forms should not even know or care whether there is any main window. Main window can know about the forms/classes it uses, but not the other way round. So why would you want or need to in your situation? If you do need to communicate, use signals/slots for this purpose.

Thing of it like parents & children in real life. Parents can manipulate and instruct children what to do directly, if necessary. But children aren't allowed to do that to their parents; at best they can send little message-signals, which their parents can pick up and act on or ignore. At least that's what the relationship should look like. :D

Uberlinc

Okay, so basically all manipulations of the form are done within the file.cpp/class to which it pertains?

Thanks.
I'll give it a try from that way.