Not supported in Avalonia 11-preview4

[TimB-rain]

After updating from Avalonia 10 to Avalonia 11-preview4 we have the exception in compiler

SettingsViewModel.cs(26, 34): [CS0012] The type 'IResourceProvider' is defined in an assembly that is not referenced. You must add a reference to assembly 'Avalonia.Styling, Version=0.10.18.0, Culture=neutral, PublicKeyToken=c8d484a7012f9a8b'.

using Avalonia;
using Avalonia.Styling;
using NP.Avalonia.Visuals.Behaviors;
using NP.Avalonia.Visuals.ThemingAndL10N;
using ReactiveUI;
using System;
using System.Reflection;
using System.Threading.Tasks;

namespace QxCode.Projector.Desktop.ViewModels {
    public class SettingsViewModel : ViewModelBase {
        private readonly IWindowsService _ws;
        private readonly ThemeLoader _languageThemeLoader;

        public SettingsViewModel(IWindowsService ws) {
            //some code
            _languageThemeLoader=Application.Current?.Resources.GetThemeLoader("LanguageLoader")!;
            //some code
        }
        //some code
}

[TimB-rain]

Could you please recompile libraries with last version of Avalonia? I have problems with compilation

[npolyak]

I plan to port it soon.

[TimB-rain]

Great! Thanks!)

[Abdesol]

I plan to port it soon.

Still, I am not able to make it work on preview 4

[npolyak]

Hey, sorry, when I said that I'll port it soon, I was told by some people at Avalonia that the 11 RC is coming in December 22 while the full version is coming in Jan. Now they have a very different schedule and they are actually not sure when they are moving to 11 RC and full version. So, I decided to wait longer. I do not have bandwidth to support both versions at the same time. Regards.

[npolyak]

take a look at AvaloniaUI/Avalonia#2239 (comment)

[DigitalAdeel]

same question here. had to update to preview5 and now can't do localization cuz of that same error

[npolyak]

Hey DigitalAdeel,
I read that preview5 has a lot of bugs, so I would not want to convert my libraries to a buggy version. Let us wait for 11 RC and I'll convert my libraries several days after.

[npolyak]

Here it is: AvaloniaUI/Avalonia#10193 (comment)
I quote:
"Preview 5 has more issues than any of the previous previews and I'm seeing quite a few more-fundamental problems with controls just not rendering correctly along with various crashes. This is going to get fixed, it's just going to take a bit"

[DigitalAdeel]

Problem with Preview4 is that libvlcsharp gives Avalonia.Styling error if I use preview4 and problem with 0.10.18 is that I can't force it to use dark theme not according to sytem's theme color.
Is there any property like RequestedThemeVariant? If yes, then I'll be able to downgrade back to 0.10.18

[DigitalAdeel]

Cuz my client only wants black color for background, I need to force it to use dark theme only.

[npolyak]

For Avalonia built in themes in 0.10.18 version - yes there are ways to switch between light and dark for both Fluent and Default themes. For fluent theme - there is a property Mode that you can change between Light and Dark, e.g.

<Application xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="SimpleAvaloniaApp.App">
    <Application.Styles>
        <FluentTheme Mode="Light"/>
    </Application.Styles>
</Application>

For Default theme - it is done differently, by switching between BaseLight.xaml and BaseDark.xaml, e.g

<Application xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="NP.Demos.DragBehaviorSample.App">
    <Application.Styles>
        <StyleInclude Source="avares://Avalonia.Themes.Default/Accents/BaseDark.xaml" />
        <StyleInclude Source="avares://Avalonia.Themes.Default/DefaultTheme.xaml" />
    </Application.Styles>
</Application>

using avares://Avalonia.Themes.Default/Accents/BaseDark.xaml will produce dark theme, while using avares://Avalonia.Themes.Default/Accents/BaseLight.xaml will produce light theme.

[npolyak]

in version 11 - built-in theming is different, BTW.

[DigitalAdeel]

Anyway to force dark theme in 0.10.18?

[DigitalAdeel]

As you can see, my client sent me buglist yesterday and mentions about it cuz he's using light theme on his pc and I'm using dark