Squashed 'FSI.Lib/' content from commit dceb500

git-subtree-dir: FSI.Lib
git-subtree-split: dceb5008a2176c2b8ab5e55a73b1c25d31a7f841

FSI.Lib/MVVM/DelegateCommand.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Windows.Input;
+
+namespace FSI.Lib.MVVM
+{
+    /// <summary>
+    ///     DelegateCommand borrowed from
+    ///     http://www.wpftutorial.net/DelegateCommand.html
+    /// </summary>
+    public class DelegateCommand : ICommand
+    {
+        private readonly Predicate<object> _canExecute;
+        private readonly Action<object> _execute;
+
+        public DelegateCommand(Action<object> execute,
+            Predicate<object> canExecute = null)
+        {
+            _execute = execute;
+            _canExecute = canExecute;
+        }
+
+        public void RaiseCanExecuteChanged()
+        {
+            CanExecuteChanged?.Invoke(this, EventArgs.Empty);
+        }
+
+        #region ICommand Members
+
+        public event EventHandler CanExecuteChanged;
+
+        public bool CanExecute(object parameter)
+        {
+            return _canExecute == null || _canExecute(parameter);
+        }
+
+        public void Execute(object parameter)
+        {
+            _execute(parameter);
+        }
+
+        #endregion
+    }
+}