Merge pull request #520 from irihitech/locale

Add locale switch helper method

demo/Semi.Avalonia.Demo/Views/MainView.axaml

@@ -60,7 +60,7 @@
                         Foreground="{DynamicResource ButtonDefaultTertiaryForeground}"
                         Command="{Binding ToggleThemeCommand}"
                         OnContent="{StaticResource SemiIconMoon}"
-                        OffContent="{StaticResource SemiIconSun}" />
+                        OffContent="{StaticResource SemiIconSun}"/>
 
                     <Button>
                         <PathIcon Data="{StaticResource SemiIconMenu}" />

demo/Semi.Avalonia.Demo/Views/MainView.axaml.cs

@@ -60,6 +60,49 @@ public partial class MainViewModel : ObservableObject
                         CommandParameter = SemiTheme.NightSky
                     },
                 ]
+            },
+            new MenuItemViewModel()
+            {
+                Header = "Locale",
+                Items=
+                [
+                    new MenuItemViewModel
+                    {
+                        Header = "简体中文",
+                        Command = SelectLocaleCommand,
+                        CommandParameter = new System.Globalization.CultureInfo("zh-cn")
+                    },
+                    new MenuItemViewModel
+                    {
+                        Header = "English",
+                        Command = SelectLocaleCommand,
+                        CommandParameter = new System.Globalization.CultureInfo("en-us")
+                    },
+                    new MenuItemViewModel
+                    {
+                        Header = "日本語",
+                        Command = SelectLocaleCommand,
+                        CommandParameter = new System.Globalization.CultureInfo("ja-jp")
+                    },
+                    new MenuItemViewModel
+                    {
+                        Header = "Українська",
+                        Command = SelectLocaleCommand,
+                        CommandParameter = new System.Globalization.CultureInfo("uk-ua")
+                    },
+                    new MenuItemViewModel
+                    {
+                        Header = "Русский",
+                        Command = SelectLocaleCommand,
+                        CommandParameter = new System.Globalization.CultureInfo("ru-ru")
+                    },
+                    new MenuItemViewModel
+                    {
+                        Header = "繁體中文",
+                        Command = SelectLocaleCommand,
+                        CommandParameter = new System.Globalization.CultureInfo("zh-tw")
+                    },
+                ]
             }
         ];
     }
@@ -83,6 +126,16 @@ public partial class MainViewModel : ObservableObject
         }
     }
     
+    [RelayCommand]
+    private void SelectLocale(object? obj)
+    {
+        var app = Application.Current;
+        if (app is not null)
+        {
+            SemiTheme.OverrideLocaleResources(app, obj as System.Globalization.CultureInfo);
+        }
+    }
+
     [RelayCommand]
     private static async Task OpenUrl(string url)
     {

src/Semi.Avalonia/SemiTheme.axaml.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Globalization;
+using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Markup.Xaml;
 using Avalonia.Styling;
@@ -60,4 +61,24 @@ public class SemiTheme : Styles
         }
         return _localeToResource[new CultureInfo("zh-cn")];
     }
+
+    public static void OverrideLocaleResources(Application application, CultureInfo? culture)
+    {
+        if (culture is null) return;
+        if (!_localeToResource.TryGetValue(culture, out var resources)) return;
+        foreach (var kv in resources)
+        {
+            application.Resources[kv.Key] = kv.Value;
+        }
+    }
+    
+    public static void OverrideLocaleResources(StyledElement element, CultureInfo? culture)
+    {
+        if (culture is null) return;
+        if (!_localeToResource.TryGetValue(culture, out var resources)) return;
+        foreach (var kv in resources)
+        {
+            element.Resources[kv.Key] = kv.Value;
+        }
+    }
 }