Custom Title Bar Colors not working after migrating to .NET 8

[stephansum]

Description

With .NET 7 i was able to customize the title bar colors for my windows maui application like this:

<maui:MauiWinUIApplication.Resources>
    <ResourceDictionary>
        <SolidColorBrush x:Key="WindowCaptionBackground" Color="#0c0c0c" />
        <SolidColorBrush x:Key="WindowCaptionBackgroundDisabled" Color="Black" />
        <SolidColorBrush x:Key="WindowCaptionForeground" Color="#f2f2f2" />
        <SolidColorBrush x:Key="WindowCaptionForegroundDisabled" Color="White" />
    </ResourceDictionary>
</maui:MauiWinUIApplication.Resources>

After migrating to .NET 8 it seems like these dictionairy keys are no longer considered. I am just getting the default title bar appearance.

Note that iam using ExtendsContentIntoTitleBar = false in my scenario. When i try go with a fully customized title bar using window.ExtendsContentIntoTitleBar = true, i get a different problem already described here: #18773

I also tried to color my title bar using:

<DataTemplate x:Key="MauiAppTitleBarTemplate">
    <Grid
        Canvas.ZIndex="1" 
        Background="#0c0c0c"
        VerticalAlignment="Stretch"
        Margin="0,0,0,0">
        <TextBlock 
            VerticalAlignment="Center"
            HorizontalAlignment="Left"
            Text="My App" 
            Foreground="#f2f2f2"
            FontWeight="Bold"/>
    </Grid>
</DataTemplate>

but i didnt find a way to change the foreground color of the system buttons (close, minimize etc)

Any tips/workarounds are appreciated until this is resolved.

Steps to Reproduce

No response

Link to public reproduction project repository

No response

Version with bug

8.0.3

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

7.0.101

Affected platforms

Windows

Affected platform versions

net8.0-windows10.0.19041.0

Did you find any workaround?

No response

Relevant log output

No response

[Foda]

Hello! We have plans to provide more robust APIs for titlebar customization in the next major release, but for now you should be able to modify the titlebar foreground color by using:

appWindow.TitleBar.ButtonForegroundColor

[stephansum]

thnx @Foda for your Feedback. Unfortunately appWindow.TitleBar.ButtonForegroundColor is not supported on Windows 10:

https://learn.microsoft.com/en-us/windows/apps/develop/title-bar?tabs=wasdk#:~:text=active%20window%20colors.-,//%20Note%3A%20No%20effect%20when%20app%20is%20running%20on%20Windows%2010%0A%20%20%20%20%20%20%20%20//%20because%20color%20customization%20is%20not%20supported.,-m_TitleBar.ForegroundColor%20%3D%20Colors

[Yu-Core]

@stephansum
I am using Windows 10 (.NET 8), appWindow.TitleBar.ButtonForegroundColor is supported。

[stephansum]

@Yu-Core

appWindow.TitleBar.ButtonForegroundColor is indeed supported whereas
appWindow.TitleBar.ForegroundColor is not

Docs could be more clear on that. Anyway - thank you for pointing that out - helped me a lot !