impl #1261

src/Snap.Hutao/Snap.Hutao/IdentifyMonitorWindow.xaml

@@ -0,0 +1,16 @@
+<Window
+    x:Class="Snap.Hutao.IdentifyMonitorWindow"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d">
+    <Grid Padding="16">
+        <TextBlock Text="当前显示器为："/>
+        <TextBlock
+            HorizontalAlignment="Center"
+            VerticalAlignment="Center"
+            Text="{x:Bind Monitor}"
+            TextAlignment="Center"/>
+    </Grid>
+</Window>

src/Snap.Hutao/Snap.Hutao/IdentifyMonitorWindow.xaml.cs

@@ -0,0 +1,18 @@
+// Copyright (c) DGP Studio. All rights reserved.
+// Licensed under the MIT license.
+
+using Microsoft.UI.Xaml;
+
+namespace Snap.Hutao;
+
+internal sealed partial class IdentifyMonitorWindow : Window
+{
+    public IdentifyMonitorWindow(string monitor)
+    {
+        InitializeComponent();
+
+        Monitor = monitor;
+    }
+
+    public string Monitor { get; private set; }
+}

src/Snap.Hutao/Snap.Hutao/Snap.Hutao.csproj

@@ -107,6 +107,7 @@
     <None Remove="Control\Theme\Uri.xaml" />
     <None Remove="Control\Theme\WindowOverride.xaml" />
     <None Remove="GuideWindow.xaml" />
+    <None Remove="IdentifyMonitorWindow.xaml" />
     <None Remove="IdentityStructs.json" />
     <None Remove="LaunchGameWindow.xaml" />
     <None Remove="Resource\BlurBackground.png" />
@@ -544,7 +545,13 @@
       <Generator>MSBuild:Compile</Generator>
     </Page>
   </ItemGroup>
-
+	
+  <ItemGroup>
+    <Page Update="IdentifyMonitorWindow.xaml">
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
+  </ItemGroup>
+	
   <ItemGroup>
     <Page Update="View\Control\HutaoStatisticsCard.xaml">
       <Generator>MSBuild:Compile</Generator>

src/Snap.Hutao/Snap.Hutao/View/Page/LaunchGamePage.xaml

@@ -259,6 +259,10 @@
                                         </cwc:SettingsCard>
                                         <cwc:SettingsCard Description="{shcm:ResourceString Name=ViewPageLaunchGameMonitorsDescription}" Header="-monitor">
                                             <StackPanel Orientation="Horizontal" Spacing="16">
+                                                <Button
+                                                    Width="120"
+                                                    Command="{Binding IdentifyMonitorsCommand}"
+                                                    Content="检测显示器"/>
                                                 <shc:SizeRestrictedContentControl>
                                                     <ComboBox
                                                         DisplayMemberPath="Name"

src/Snap.Hutao/Snap.Hutao/ViewModel/Game/LaunchGameViewModel.cs

@@ -3,6 +3,7 @@
 
 using CommunityToolkit.WinUI.Collections;
 using Microsoft.Extensions.Caching.Memory;
+using Microsoft.UI.Windowing;
 using Snap.Hutao.Core;
 using Snap.Hutao.Core.Diagnostics.CodeAnalysis;
 using Snap.Hutao.Core.ExceptionService;
@@ -19,6 +20,7 @@ using Snap.Hutao.Web.Hoyolab.SdkStatic.Hk4e.Launcher;
 using System.Collections.Immutable;
 using System.Collections.ObjectModel;
 using System.IO;
+using Windows.Graphics;
 
 namespace Snap.Hutao.ViewModel.Game;
 
@@ -338,4 +340,42 @@ internal sealed partial class LaunchGameViewModel : Abstraction.ViewModel, IView
             };
         }
     }
+
+    [Command("IdentifyMonitorsCommand")]
+    private async Task IdentifyMonitorsAsync()
+    {
+        List<IdentifyMonitorWindow> windows = [];
+
+        IReadOnlyList<DisplayArea> displayAreas = DisplayArea.FindAll();
+        for (int i = 0; i < displayAreas.Count; i++)
+        {
+            DisplayArea displayArea = displayAreas[i];
+            int index = i + 1;
+
+            // Refresh thread to avoid access violation
+            await taskContext.SwitchToBackgroundAsync();
+            await taskContext.SwitchToMainThreadAsync();
+            IdentifyMonitorWindow window = new($"{displayArea.DisplayId.Value:X8}:{index}");
+            AppWindow appWindow = window.AppWindow;
+
+            OverlappedPresenter presenter = OverlappedPresenter.Create();
+            presenter.SetBorderAndTitleBar(false, false);
+            presenter.IsAlwaysOnTop = true;
+            appWindow.SetPresenter(presenter);
+
+            SizeInt32 size = new((int)(displayArea.WorkArea.Width * 0.15), (int)(displayArea.WorkArea.Height * 0.15));
+            PointInt32 point = new(displayArea.WorkArea.X, displayArea.WorkArea.Y);
+            appWindow.Resize(size);
+            appWindow.Move(point);
+
+            window.Activate();
+
+            windows.Add(window);
+        }
+
+        await Delay.FromSeconds(3).ConfigureAwait(false);
+
+        await taskContext.SwitchToMainThreadAsync();
+        windows.ForEach(window => window.Close());
+    }
 }