Fix not working hotkey on a custom control. closes #12323

src/Avalonia.Controls/HotkeyManager.cs

@@ -149,10 +149,10 @@ static HotKeyManager()
                     return;
 
                 var control = args.Sender as Control;
-                if (control is not IClickableControl)
+                if (control is not IClickableControl and not ICommandSource)
                 {
                     Logging.Logger.TryGet(Logging.LogEventLevel.Warning, Logging.LogArea.Control)?.Log(control,
-                        $"The element {args.Sender.GetType().Name} does not implement IClickableControl and does not support binding a HotKey ({args.NewValue}).");
+                        $"The element {args.Sender.GetType().Name} does not implement IClickableControl nor ICommandSource and does not support binding a HotKey ({args.NewValue}).");
                     return;
                 }
 

tests/Avalonia.Controls.UnitTests/HotKeyedControlsTests.cs

@@ -0,0 +1,122 @@
+using System;
+using System.Windows.Input;
+using Avalonia.Input;
+using Avalonia.Input.Raw;
+using Avalonia.LogicalTree;
+using Avalonia.Platform;
+using Avalonia.UnitTests;
+using Moq;
+using Xunit;
+
+namespace Avalonia.Controls.UnitTests
+{
+    internal class HotKeyedTextBox : TextBox, ICommandSource
+    {
+        private class DelegateCommand : ICommand
+        {
+            private readonly Action _action;
+            public DelegateCommand(Action action) => _action = action;
+            public event EventHandler CanExecuteChanged { add { } remove { } }
+            public bool CanExecute(object parameter) => true;
+            public void Execute(object parameter) => _action();
+        }
+
+        public static readonly StyledProperty<KeyGesture> HotKeyProperty =
+            HotKeyManager.HotKeyProperty.AddOwner<HotKeyedTextBox>();
+
+        private KeyGesture _hotkey;
+
+        public KeyGesture HotKey
+        {
+            get => GetValue(HotKeyProperty);
+            set => SetValue(HotKeyProperty, value);
+        }
+
+        protected override void OnAttachedToLogicalTree(LogicalTreeAttachmentEventArgs e)
+        {
+            if (_hotkey != null)
+            {
+                this.SetValue(HotKeyProperty, _hotkey);
+            }
+
+            base.OnAttachedToLogicalTree(e);
+        }
+
+        protected override void OnDetachedFromLogicalTree(LogicalTreeAttachmentEventArgs e)
+        {
+            if (this.HotKey != null)
+            {
+                _hotkey = this.HotKey;
+                this.SetValue(HotKeyProperty, null);
+            }
+
+            base.OnDetachedFromLogicalTree(e);
+        }
+
+        public void CanExecuteChanged(object sender, EventArgs e)
+        {
+        }
+
+        protected override Type StyleKeyOverride => typeof(TextBox);
+
+        public ICommand Command => _command;
+
+        public object CommandParameter => null;
+
+        private readonly DelegateCommand _command;
+
+        public HotKeyedTextBox()
+        {
+            _command = new DelegateCommand(() => Focus());
+        }
+    }
+
+    public class HotKeyedControlsTests
+    {
+        private static Window PreparedWindow(object content = null)
+        {
+            var platform = AvaloniaLocator.Current.GetRequiredService<IWindowingPlatform>();
+            var windowImpl = Mock.Get(platform.CreateWindow());
+            windowImpl.Setup(x => x.Compositor).Returns(RendererMocks.CreateDummyCompositor());
+            var w = new Window(windowImpl.Object) { Content = content };
+            w.ApplyTemplate();
+            return w;
+        }
+
+        private static IDisposable CreateServicesWithFocus()
+        {
+            return UnitTestApplication.Start(
+                TestServices.StyledWindow.With(
+                    windowingPlatform: new MockWindowingPlatform(
+                        null,
+                        window => MockWindowingPlatform.CreatePopupMock(window).Object),
+                focusManager: new FocusManager(),
+                keyboardDevice: () => new KeyboardDevice()));
+        }
+
+        [Fact]
+        public void HotKeyedTextBox_Focus_Performed_On_Hotkey()
+        {
+            using var _ = CreateServicesWithFocus();
+
+            var keyboardDevice = new KeyboardDevice();
+            var hotKeyedTextBox = new HotKeyedTextBox { HotKey = new KeyGesture(Key.F, KeyModifiers.Control) };
+            var root = PreparedWindow();
+            root.Content = hotKeyedTextBox;
+            root.Show();
+
+            Assert.False(hotKeyedTextBox.IsFocused);
+
+            keyboardDevice.ProcessRawEvent(
+                new RawKeyEventArgs(
+                    keyboardDevice,
+                    0,
+                    root,
+                    RawKeyEventType.KeyDown,
+                    Key.F,
+                    RawInputModifiers.Control));
+
+            Assert.True(hotKeyedTextBox.IsFocused);
+        }
+    }
+}