Merge pull request #647 from GF-Huang/MenuItemAttach

Add MenuItemAttach.

src/Directory.Build.Props

@@ -1,4 +1,4 @@
-<Project>
+<Project>
     <PropertyGroup>
         <UseWPF>true</UseWPF>
         <Version>3.5.0.0</Version>

src/Shared/HandyControl_Shared/Controls/Attach/MenuItemAttach.cs

@@ -0,0 +1,62 @@
+using System.Linq;
+using System.Windows;
+using System.Windows.Controls;
+using HandyControl.Tools.Extension;
+
+namespace HandyControl.Controls;
+
+public class MenuItemAttach
+{
+    public static readonly DependencyProperty GroupNameProperty =
+        DependencyProperty.RegisterAttached("GroupName", typeof(string), typeof(MenuItemAttach),
+            new PropertyMetadata(string.Empty, OnGroupNameChanged));
+
+    [AttachedPropertyBrowsableForType(typeof(MenuItem))]
+    public static string GetGroupName(DependencyObject obj) => (string) obj.GetValue(GroupNameProperty);
+
+    [AttachedPropertyBrowsableForType(typeof(MenuItem))]
+    public static void SetGroupName(DependencyObject obj, string value) => obj.SetValue(GroupNameProperty, value);
+
+    private static void OnGroupNameChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+    {
+        if (d is not MenuItem menuItem)
+        {
+            return;
+        }
+
+        menuItem.Checked -= MenuItem_Checked;
+        menuItem.Click -= MenuItem_Click;
+
+        if (string.IsNullOrWhiteSpace(e.NewValue.ToString()))
+        {
+            return;
+        }
+
+        menuItem.Checked += MenuItem_Checked;
+        menuItem.Click += MenuItem_Click;
+    }
+
+    private static void MenuItem_Checked(object sender, RoutedEventArgs e)
+    {
+        if (sender is not MenuItem { Parent: MenuItem parent } menuItem)
+        {
+            return;
+        }
+
+        var groupName = GetGroupName(menuItem);
+        parent
+            .Items
+            .OfType<MenuItem>()
+            .Where(item => item != menuItem && item.IsCheckable && string.Equals(GetGroupName(item), groupName))
+            .Do(item => item.IsChecked = false);
+    }
+
+    private static void MenuItem_Click(object sender, RoutedEventArgs e)
+    {
+        // prevent uncheck when click the checked menu item
+        if (e.OriginalSource is MenuItem { IsChecked: false } menuItem)
+        {
+            menuItem.IsChecked = true;
+        }
+    }
+}

src/Shared/HandyControl_Shared/HandyControl_Shared.projitems

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
@@ -23,6 +23,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Attach\InfoElement.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Attach\ListBoxAttach.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Attach\MenuAttach.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Controls\Attach\MenuItemAttach.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Attach\MenuTopLineAttach.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Attach\PanelElement.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Attach\PasswordBoxAttach.cs" />