Change Hover Color for all Controls

[ShrutiJaiswal1494]

Hi,

I want to change the default hover color of all the controls in my application. I am using the Fluent theme for DataGrid and FluentLight theme for my application. Is there a way to set the color through code? Tried looking through the web but cannot find anything relevant. Any help is much appreciated. Thanks in advance..!!

[maxkatz6]

There is a file https://github.com/AvaloniaUI/Avalonia/blob/master/src/Avalonia.Themes.Fluent/Accents/AccentColors.xaml with accent colors. You can redefine them or replace whole file.

And there are specific controls color resources https://github.com/AvaloniaUI/Avalonia/blob/master/src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesDark.xaml . You also can redefine them or replace whole file.

By redefining I mean creating your own style-resources file with putting brushes with the same key but your color value in there. This approach is recommended and simpler, but there might be issues with some specific controls (new value can be ignored).

By replacing whole file I mean replacing FluentTheme style include from App.xaml and instead including theme parts manually. I.e. if you open FluentDark content - https://github.com/AvaloniaUI/Avalonia/blob/master/src/Avalonia.Themes.Fluent/FluentDark.xaml , you will see it's simple and you can copy that into your application instead of <FluentTheme />. And instead of default AccentColors.xaml you can put there your own one.

[ShrutiJaiswal1494]

@maxkatz6 As you suggested I am trying to create a separate Styles file and include it through StyleInclue but I am not sure what should I give for the URI. I tried using the local path for the styles file but doesn't work it seems.

private static readonly StyleInclude s_DataGridFluent = new StyleInclude(new Uri("avares://ControlCatalog/Styles"))
        {
            Source = new Uri("avares://Avalonia.Controls.DataGrid/Themes/Fluent.xaml")
        };

private static readonly StyleInclude s_ColorStyles = new(new Uri("C:/Users/shjaiswal/source/repos/MyRepo/MyProject/TestUI"))
        {
            Source = new Uri("/Styles/Colors.axaml")
        };

        public static Styles FluentLight = new()
        {
            new StyleInclude(new Uri("avares://ControlCatalog/Styles"))
            {
                Source = new Uri("avares://Avalonia.Themes.Fluent/FluentLight.xaml")
            },
            s_DataGridFluent,
            s_ColorStyles
        };

[maxkatz6]

Path is relative to project root:

new(new Uri("avares://Test/Styles"))
        {
            Source = new Uri("avares://Test/Styles/Colors.axaml")
        };

Or maybe it will work too:

new(new Uri("avares://Test"))
        {
            Source = new Uri("/Styles/Colors.axaml")
        };

"Test" is project name.

[ShrutiJaiswal1494]

Tried both. The first one is throwing a null pointer exception in Style.cs

And the second one throws a System.TypeInitializationException

[maxkatz6]

can you share your test project?

[ShrutiJaiswal1494]

Got the first example working. Thank you so much :)