Organizing program structure so that it is easy understandable

[Tiansen]

That's a bad idea. Each tab should be in each own class.

I agree totally with you. I am just saying that if you use Qt Designer to build GUI, you get only one GUI class for all tabs when using QTabWidget. So there is a way to assign different classes to different tabs?
I think that I must do following then:

1. Make GUI class for each desired tab.
2. Design GUI part of each class (can be done with Designer too).
3. Then assign these GUI classes to each tabs (I think this must be done with code, because Designer doesnt support it).

Am I correct here?

[wysota]

I agree totally with you. I am just saying that if you use Qt Designer to build GUI, you get only one GUI class for all tabs when using QTabWidget.

No, that only happens if you do everything inside one form.

So there is a way to assign different classes to different tabs?

Yes, at least two such ways. One is to design each tab as a separate widget and then create a QTabWidget in manual written code and add those tabs to the widget there. The other is to make each of your pages a custom widget (either through plugins or by promoting the base class to the custom class) and make a form containing QTabWidget and place those custom widget as pages on the form. The first approach is better because you end up with a simpler hierarchy of objects.