Ability to override app theme across all system UI (title bar, Share dialog, file picker, etc)

[jaigak]

Today many Windows apps provide an option to use a different one than the default. However, there have been some challenges with that for example:

1. System provided UI will still use the system theme (some things like the Share dialog provides the ability to customize the theme it uses but not everything).
2. Unless you use a custom title bar, the default title bar will use the system theme and not the theme for the application, this is where many bugs happen since many don't bother.
3. Third-party libraries need to ask the application the theme or assume the app theme is the same as the default system theme.

Consider adding an API where the application can set whether it wants light, dark and Windows default and UI frameworks will automatically adapt it as well as all the system UI including default title bar.

[sylveon]

It already exists: https://docs.microsoft.com/en-us/uwp/api/windows.ui.xaml.application.requestedtheme

[jaigak]

It already exists: https://docs.microsoft.com/en-us/uwp/api/windows.ui.xaml.application.requestedtheme

That's a feature of the XAML UI framework and not the system itself. It doesn't apply to the title bar or any other system UI for example unless you manually customize it if it offers the ability to (eg: Share dialog has a Theme property where you can specify the theme to use when it's opened).

[andrewleader]

Hi @Jaiganeshkumaran, thanks for this suggestion! That request definitely makes sense, but we don't have any immediate plans for this now. We'll leave this open to collect additional feedback from developers!

[chigy]

Thank you for the feature request. In order for us to be transparent to our community members, we are proactively closing any feature requests that we do not believe we can realistically get to in the next 1-2 years. If you feel this is feature is critical and urgent, and need to be prioritized over other issues our team is currently looking to delivering, please add detailed information about how the app ecosystem would benefit from it when reopening the issue. It will be very helpful for us, thanks!

[jaigak]

@chigy This is a feature that almost every new application wants to have and currently they all do it in a broken manner.