Add Dark mode support in the sample app

[HobDev]

There are docs for dark mode support with XAML in maui. But for someone using C# and C# markup to write the UI the sample should have support for dark mode.

[brminnick]

Converting to Discussion

[bijington]

We already have #75. I think we could use that to cover dark mode support?

[HobDev]

But this is about implementing dark mode in the sample app until the AppThemeBinding is complete. I want to contribute if someone guide me how to do this.

[brminnick]

You're welcome to open a PR for the sample app!

It's not a new feature to the toolkit so it doesn't require a New Feature Proposal.

@bijington - what do you think about us creating another Issue Template for Sample App features/changes? We don't really have a workflow for the Sample App yet.

[HobDev]

@brminnick
I have never done this before. I can implement the dark mode support by learning from the GitTrend. But this bug could be a blocker. As far as I can understand you are using the Application.Current.RequestedThemeChanged event to change the theme. I need some guidance about how you are changing the theme. Once I get hold of it I will implement it in the whole app.

[bijington]

@HobDev oh I see. I was thinking we could add support when making the change but I appreciate the two probably should be treated separately.

@brminnick I'm not sure we need a new template for changes to the sample app. My hope is this wouldn't happen often and typically changes will come with proposal implementations

[HobDev]

@bijington @brminnick I completed the darkmode support in the sample app. The link to the pull request is this