feat: quick fix and rename.

demo/Ursa.Demo/App.axaml

@@ -5,6 +5,6 @@
     xmlns:u-semi="https://irihi.tech/ursa/themes/semi">
     <Application.Styles>
         <StyleInclude Source="avares://Semi.Avalonia/Themes/Index.axaml" />
-        <u-semi:SemiTheme Locale="en-US"/>
+        <u-semi:SemiTheme Locale="zh-CN"/>
     </Application.Styles>
 </Application>

demo/Ursa.Demo/Dialogs/DialogWithActionViewModel.cs

@@ -14,10 +14,10 @@ public partial class DialogWithActionViewModel: ObservableObject, IDialogContext
 
     public void Close()
     {
-        Closed?.Invoke(this, false);
+        RequestClose?.Invoke(this, false);
     }
 
-    public event EventHandler<object?>? Closed;
+    public event EventHandler<object?>? RequestClose;
     
     public ICommand OKCommand { get; set; }
     public ICommand CancelCommand { get; set; }
@@ -35,12 +35,12 @@ public partial class DialogWithActionViewModel: ObservableObject, IDialogContext
 
     private void OK()
     {
-        Closed?.Invoke(this, true);
+        RequestClose?.Invoke(this, true);
     }
 
     private void Cancel()
     {
-        Closed?.Invoke(this, false);
+        RequestClose?.Invoke(this, false);
     }
     
     private async Task ShowDialog()

src/Ursa/Controls/Dialog/DialogControl.cs

@@ -31,12 +31,12 @@ public class DialogControl: ContentControl
     {
         if (args.OldValue.Value is IDialogContext oldContext)
         {
-            oldContext.Closed-= CloseFromContext;
+            oldContext.RequestClose-= OnContextRequestClose;
         }
 
         if (args.NewValue.Value is IDialogContext newContext)
         {
-            newContext.Closed += CloseFromContext;
+            newContext.RequestClose += OnContextRequestClose;
         }
     }
     
@@ -102,7 +102,7 @@ public class DialogControl: ContentControl
         }
     }
 
-    private void CloseFromContext(object sender, object? args)
+    private void OnContextRequestClose(object sender, object? args)
     {
         if (this.DataContext is IDialogContext context)
         {

src/Ursa/Controls/Dialog/DialogWindow.cs

@@ -26,12 +26,12 @@ public class DialogWindow: Window
     {
         if (args.OldValue.Value is IDialogContext oldContext)
         {
-            oldContext.Closed-= OnDialogContextClose;
+            oldContext.RequestClose-= OnContextRequestClose;
         }
 
         if (args.NewValue.Value is IDialogContext newContext)
         {
-            newContext.Closed += OnDialogContextClose;
+            newContext.RequestClose += OnContextRequestClose;
         }
     }
 
@@ -43,7 +43,7 @@ public class DialogWindow: Window
         EventHelper.RegisterClickEvent(OnDefaultClose, _closeButton);
     }
 
-    private void OnDialogContextClose(object? sender, object? args)
+    private void OnContextRequestClose(object? sender, object? args)
     {
         Close(args);
     }

src/Ursa/Controls/Dialog/IDialogContext.cs

@@ -3,5 +3,5 @@ namespace Ursa.Controls;
 public interface IDialogContext
 {
     void Close();
-    event EventHandler<object?> Closed;
+    event EventHandler<object?> RequestClose;
 }

src/Ursa/Controls/NumericUpDown/NumericUpDownBase.cs

@@ -194,6 +194,7 @@ public abstract class NumericUpDown : TemplatedControl
             if (AllowDrag && _dragPanel is not null)
             {
                 _dragPanel.IsVisible = true;
+                _dragPanel.Focus();
             }
         }
     }
@@ -204,8 +205,14 @@ public abstract class NumericUpDown : TemplatedControl
         if (e.ClickCount == 2 && _dragPanel is not null && AllowDrag)
         {
             _dragPanel.IsVisible = false;
+            _textBox.IsReadOnly = false;
         }
-        _textBox?.Focus();
+        else
+        {
+            _textBox?.Focus();
+            _textBox!.IsReadOnly = true;
+        }
+        
     }
     
     private void OnDragPanelPointerReleased(object sender, PointerReleasedEventArgs e)