SearchBar command support

HandyControl/Controls/Input/SearchBar.cs

@@ -7,7 +7,7 @@ using HandyControl.Interactivity;
 
 namespace HandyControl.Controls
 {
-    public class SearchBar : TextBox
+    public class SearchBar : TextBox, ICommandSource
     {
         public SearchBar()
         {
@@ -51,6 +51,16 @@ namespace HandyControl.Controls
             {
                 Info = Text
             });
+
+            if (Command == null) return;
+            if (Command is RoutedCommand command)
+            {
+                command.Execute(CommandParameter, CommandTarget);
+            }
+            else
+            {
+                Command.Execute(CommandParameter);
+            }
         }
 
         /// <summary>
@@ -67,5 +77,54 @@ namespace HandyControl.Controls
             get => (bool)GetValue(IsRealTimeProperty);
             set => SetValue(IsRealTimeProperty, value);
         }
+
+        public static readonly DependencyProperty CommandProperty = DependencyProperty.Register(
+            "Command", typeof(ICommand), typeof(SearchBar), new PropertyMetadata(default(ICommand), OnCommandChanged));
+
+        private static void OnCommandChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            var ctl = (SearchBar)d;
+            if (e.OldValue is ICommand oldCommand)
+            {
+                oldCommand.CanExecuteChanged -= ctl.CanExecuteChanged;
+            }
+            if (e.NewValue is ICommand newCommand)
+            {
+                newCommand.CanExecuteChanged += ctl.CanExecuteChanged;
+            }
+        }
+
+        public ICommand Command
+        {
+            get => (ICommand) GetValue(CommandProperty);
+            set => SetValue(CommandProperty, value);
+        }
+
+        public static readonly DependencyProperty CommandParameterProperty = DependencyProperty.Register(
+            "CommandParameter", typeof(object), typeof(SearchBar), new PropertyMetadata(default(object)));
+
+        public object CommandParameter
+        {
+            get => GetValue(CommandParameterProperty);
+            set => SetValue(CommandParameterProperty, value);
+        }
+
+        public static readonly DependencyProperty CommandTargetProperty = DependencyProperty.Register(
+            "CommandTarget", typeof(IInputElement), typeof(SearchBar), new PropertyMetadata(default(IInputElement)));
+
+        public IInputElement CommandTarget
+        {
+            get => (IInputElement) GetValue(CommandTargetProperty);
+            set => SetValue(CommandTargetProperty, value);
+        }
+
+        private void CanExecuteChanged(object sender, EventArgs e)
+        {
+            if (Command == null) return;
+
+            IsEnabled = Command is RoutedCommand command
+                ? command.CanExecute(CommandParameter, CommandTarget)
+                : Command.CanExecute(CommandParameter);
+        }
     }
 }