init

Common/DTS.Common/Classes/DTS.Viewer/Commands/RelayCommand.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Windows.Input;
+
+namespace DTS.Common.Classes.Viewer.Commands
+{
+    public class RelayCommand : ICommand
+    {
+        #region Fields
+
+        readonly Action<object> _execute;
+        readonly Predicate<object> _canExecute;
+
+        #endregion // Fields
+
+        #region Constructors
+
+        public RelayCommand(Action<object> execute)
+            : this(execute, null)
+        {
+        }
+
+        public RelayCommand(Action<object> execute, Predicate<object> canExecute)
+        {
+            _execute = execute ?? throw new ArgumentNullException("execute");
+            _canExecute = canExecute;
+        }
+        #endregion // Constructors
+
+        #region ICommand Members
+
+        public bool CanExecute(object parameter)
+        {
+            return _canExecute?.Invoke(parameter) ?? true;
+        }
+
+        public event EventHandler CanExecuteChanged
+        {
+            add => CommandManager.RequerySuggested += value;
+            remove => CommandManager.RequerySuggested -= value;
+        }
+
+        public void Execute(object parameter)
+        {
+            _execute(parameter);
+        }
+
+        #endregion // ICommand Members
+    }
+}