更新 README.md，新增 PseudoClasses 说明及示例，更新 VariableBox 版本至 0.5.0

Author: heartacker

README.md

@@ -34,6 +34,12 @@ VariableBox is a Avalonia Control for building cross-platform UIs with Avalonia
 
 ## ChangeLog
 
+- 2025/02/21(v0.5.0)
+  1. remote property `IsEnableEditingIndicator` indicator
+  2. please use the  `PseudoClasses`
+     1. `:editing` for editing
+     2. `:invalid` for invalid input
+
 - 2025/02/19(v0.4.0)
   1. fix the style of buttonspinner and the disabled style
      1. fluent,semi and simple is all supported
@@ -102,6 +108,38 @@ You can now use VariableBox controls in your Avalonia Application.
 </Window>
 ```
 
+### PseudoClasses
+
+- `:editing` for editing
+- `:invalid` for invalid input
+
+e.g.:
+
+<div style="display: flex;">
+  <div style="flex: 50%; padding: 2px;">
+  
+
+```xml
+<Style Selector="vbox|NumericUpDown:editing">
+  <Style Selector="^ /template/ TextBox#PART_TextBox">
+      <Setter Property="Foreground" Value="Green" />
+  </Style>
+  <Style Selector="^:invalid /template/ TextBox#PART_TextBox">
+      <Setter Property="Foreground" Value="Red" />
+  </Style>
+</Style>
+```
+
+  </div>
+
+  <div style="flex: 20%; padding: 2px;">
+
+![pseudoclass](assets/pseudoclass.png)
+
+  </div>
+</div>
+
+
 ### VariableBox.Themes
 
 To make VariableBox controls show up in your application, you need to reference to a theme package designed for VariableBox.

assets/pseudoclass.png

@@ -1,6 +1,6 @@
 <Project>
     <PropertyGroup>
         <AvaloniaVersion>11.2.1</AvaloniaVersion>
-        <VariableBoxVersion>0.4.1</VariableBoxVersion>
+        <VariableBoxVersion>0.5.0</VariableBoxVersion>
     </PropertyGroup>
 </Project>