first commit

2026-09-03 04:45:36 +03:00
commit d5f52cc3d3
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+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Interactivity;
+
+namespace ClassicAssist.UI.Misc
+{
+    public class BindableSelectedItemBehavior : Behavior<TreeView>
+    {
+        protected override void OnAttached()
+        {
+            base.OnAttached();
+
+            AssociatedObject.SelectedItemChanged += OnTreeViewSelectedItemChanged;
+        }
+
+        protected override void OnDetaching()
+        {
+            base.OnDetaching();
+
+            if ( AssociatedObject != null )
+            {
+                AssociatedObject.SelectedItemChanged -= OnTreeViewSelectedItemChanged;
+            }
+        }
+
+        private void OnTreeViewSelectedItemChanged( object sender, RoutedPropertyChangedEventArgs<object> e )
+        {
+            SelectedItem = e.NewValue;
+        }
+
+        #region SelectedItem Property
+
+        public object SelectedItem
+        {
+            get => GetValue( SelectedItemProperty );
+            set => SetValue( SelectedItemProperty, value );
+        }
+
+        public static readonly DependencyProperty SelectedItemProperty = DependencyProperty.Register( "SelectedItem",
+            typeof( object ), typeof( BindableSelectedItemBehavior ),
+            new UIPropertyMetadata( null, OnSelectedItemChanged ) );
+
+        private static void OnSelectedItemChanged( DependencyObject sender, DependencyPropertyChangedEventArgs e )
+        {
+            if ( e.NewValue is TreeViewItem item )
+            {
+                item.SetValue( TreeViewItem.IsSelectedProperty, true );
+            }
+        }
+
+        #endregion
+    }
+}