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Editorial Team
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Asked: 2026-05-21T17:36:24+00:00

I won’t describe the project details or the framework I am using because the

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I won’t describe the project details or the framework I am using because the question is more general.

What is the best way to create flexible interaction between the user interface and the logic.
I am struggling because constantly it turns out that I have to make some feature available for the user to change via some ui but the code for the feature is somewhere deep deep in the code so I have to do lots of refactoring.

What is your approach in such situation? Maybe to model event based system where events are dispatched/handled? In my case the requirements change very often.

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1 Answer

  1. Editorial Team

    Use a MVx design pattern such as MVC, MVP, MVVM.

    Basically:
    * UI should not call BL.
    * UI should raise events (or better yet, use commands).
    * UI-raised-events/commands should be handled outside UI and call BL.
    * BL should not call UI.
    * Either modified data should raise events or BL should raise events.
    * UI should know how to present data (preferably uses composition to present any type of data and not have entire UI rely on data types not changing).
    * UI should refresh on events.

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