Sample registry: use or not use

Question

I am considering using a registry template in my application to store weak pointers in some windows and application panels. The following is the general structure of the application.

The application has one top-level window MainFrame with a small number of child windows inside it. Tabs like TabPane can have many tabs. I need to reference the ParamsPane panel from all TabPane tabs, so I need a pointer to a ParamsPane object that will be stored somewhere. There may be many options, but the most obvious are (1) saving the pointer inside the application's Singleton object, or (2) creating a simple registry class. Sort of:

class Registry {
public:
    static MainApp* application;
    static MainWindow* mainWindow;
};

Is this a good practice? What are the benefits and caveats of this approach?

Answer 1

, ParamsPane. .

ParamsPane, TabPane .

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, .

, , TabPane, ParamsPane.

, , Singleton "Registry". , , , . , ( , ) - .

Answer 2

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Answer 3

Your registry class and Singleton are OO methods of global variables. Prefer to make the Params panel in MainFrame and pass it as a tab link.