WPF Helpers: GetFocusedElement, GetSelectedElement(s), DragDrop, etc. :: A global approach ::

[YkTru]

I know this is a common topic/problem in MVVM, but I still can't get my head around it, so beware, I may sound confused. (when I say "log", I mean in-app TextBlock logging, not Serilog)

• Is it a good idea to make a "WPF Helper" module to help with various harder to accomplish MVVM task? (get focuses/selected element for logging, set the border color of an element in a file to depend on an element in another file etc.)
• Does this Elmish sample can be made as a function (service) so we won't have to repeat "GotFocus/LostFocus etc." for each element needed such behaviors? (idem for logging)
• Again with a "global approach" in mind, would you advise to make a global anonymous style (App.xaml) targeting x:Type UIElement (or FrameworkElement?) where I can put behaviors in a template (eg.: "LogWhenSelected/Focused", "ChangeBorderColorOnExternalEvent", "DragDropBehavior", etc)?

Could you provide advices on how to organize such a module + some code too please?

Thank you

[TysonMN]

My impression is that these issues are all independent of Elmish.WPF. Therefore, I don't think it would be a good idea to have helpers in Elmish.WPF for them.

My first recommendation would be to write the code you want and organize it in a reusable way. If this became a large amount of code, then consider using an existing library that provides much of the same functionality.