real time refresh background

src/Snap.Hutao/Snap.Hutao/Message/BackgroundImageTypeChangedMessage.cs

@@ -0,0 +1,8 @@
+// Copyright (c) DGP Studio. All rights reserved.
+// Licensed under the MIT license.
+
+namespace Snap.Hutao.Message;
+
+internal sealed class BackgroundImageTypeChangedMessage
+{
+}

src/Snap.Hutao/Snap.Hutao/View/MainView.xaml

@@ -18,7 +18,7 @@
     <mxi:Interaction.Behaviors>
         <shcb:PeriodicInvokeCommandOrOnActualThemeChangedBehavior
             Command="{Binding UpdateBackgroundCommand}"
-            CommandParameter="{x:Bind BackdroundImagePresenter}"
+            CommandParameter="{x:Bind BackgroundImagePresenter}"
             Period="0:5:0"/>
     </mxi:Interaction.Behaviors>
 
@@ -31,7 +31,7 @@
     <!--  Background="{ThemeResource SolidBackgroundFillColorBaseBrush}"  -->
     <Grid Transitions="{ThemeResource EntranceThemeTransitions}">
         <Image
-            x:Name="BackdroundImagePresenter"
+            x:Name="BackgroundImagePresenter"
             HorizontalAlignment="Center"
             VerticalAlignment="Center"
             Opacity="0"

src/Snap.Hutao/Snap.Hutao/View/MainView.xaml.cs

@@ -27,10 +27,14 @@ internal sealed partial class MainView : UserControl
     /// </summary>
     public MainView()
     {
-        DataContext = Ioc.Default.GetRequiredService<MainViewModel>();
+        IServiceProvider serviceProvider = Ioc.Default;
+
+        MainViewModel mainViewModel = serviceProvider.GetRequiredService<MainViewModel>();
+
+        DataContext = mainViewModel;
         InitializeComponent();
 
-        IServiceProvider serviceProvider = Ioc.Default;
+        mainViewModel.Initialize(BackgroundImagePresenter);
 
         navigationService = serviceProvider.GetRequiredService<INavigationService>();
         if (navigationService is INavigationInitialization navigationInitialization)

src/Snap.Hutao/Snap.Hutao/ViewModel/Main/IMainViewModelInitialization.cs

@@ -0,0 +1,11 @@
+// Copyright (c) DGP Studio. All rights reserved.
+// Licensed under the MIT license.
+
+using Microsoft.UI.Xaml.Controls;
+
+namespace Snap.Hutao.ViewModel.Main;
+
+internal interface IMainViewModelInitialization
+{
+    void Initialize(Image backgroundImagePresenter);
+}

src/Snap.Hutao/Snap.Hutao/ViewModel/Main/MainViewModel.cs

@@ -1,23 +1,37 @@
 // Copyright (c) DGP Studio. All rights reserved.
 // Licensed under the MIT license.
 
+using CommunityToolkit.Mvvm.Messaging;
 using CommunityToolkit.WinUI.Animations;
 using Microsoft.UI.Xaml.Controls;
 using Microsoft.UI.Xaml.Media.Animation;
 using Snap.Hutao.Control.Animation;
 using Snap.Hutao.Control.Theme;
+using Snap.Hutao.Message;
 using Snap.Hutao.Service.BackgroundImage;
+using Snap.Hutao.ViewModel.Main;
 
 namespace Snap.Hutao.ViewModel;
 
 [ConstructorGenerated]
 [Injection(InjectAs.Singleton)]
-internal sealed partial class MainViewModel : Abstraction.ViewModel
+internal sealed partial class MainViewModel : Abstraction.ViewModel, IMainViewModelInitialization, IRecipient<BackgroundImageTypeChangedMessage>
 {
     private readonly IBackgroundImageService backgroundImageService;
     private readonly ITaskContext taskContext;
 
     private BackgroundImage? previousBackgroundImage;
+    private Image backgroundImagePresenter;
+
+    public void Initialize(Image backgroundImagePresenter)
+    {
+        this.backgroundImagePresenter = backgroundImagePresenter;
+    }
+
+    public void Receive(BackgroundImageTypeChangedMessage message)
+    {
+        UpdateBackgroundAsync(backgroundImagePresenter).SafeForget();
+    }
 
     [Command("UpdateBackgroundCommand")]
     private async Task UpdateBackgroundAsync(Image presenter)

src/Snap.Hutao/Snap.Hutao/ViewModel/Setting/SettingViewModel.cs

@@ -1,6 +1,7 @@
 // Copyright (c) DGP Studio. All rights reserved.
 // Licensed under the MIT license.
 
+using CommunityToolkit.Mvvm.Messaging;
 using Microsoft.UI.Xaml.Controls;
 using Microsoft.Windows.AppLifecycle;
 using Snap.Hutao.Core;
@@ -54,6 +55,7 @@ internal sealed partial class SettingViewModel : Abstraction.ViewModel
     private readonly IUserService userService;
     private readonly ITaskContext taskContext;
     private readonly AppOptions appOptions;
+    private readonly IMessenger messenger;
 
     private NameValue<BackdropType>? selectedBackdropType;
     private NameValue<BackgroundImageType>? selectedBackgroundImageType;
@@ -100,6 +102,7 @@ internal sealed partial class SettingViewModel : Abstraction.ViewModel
             if (SetProperty(ref selectedBackgroundImageType, value) && value is not null)
             {
                 AppOptions.BackgroundImageType = value.Value;
+                messenger.Send(new Message.BackgroundImageTypeChangedMessage());
             }
         }
     }