项目结构调整

Others/Fluent.Ribbon/Fluent.Ribbon.Showcase/Commanding/RelayCommand.cs

@@ -0,0 +1,130 @@
+#pragma warning disable SA1402
+
+namespace FluentTest.Commanding
+{
+    using System;
+    using System.Diagnostics;
+    using System.Windows.Input;
+
+    public class RelayCommand : IRelayCommand
+    {
+        private readonly Action action;
+        private readonly Func<bool> canExecute;
+
+        protected RelayCommand()
+        {
+        }
+
+        public RelayCommand(Action execute)
+        {
+            this.action = execute;
+        }
+
+        public RelayCommand(Action execute, Func<bool> canExecute)
+            : this(execute)
+        {
+            this.canExecute = canExecute;
+        }
+
+        #region IRelayCommand Members
+
+        [DebuggerStepThrough]
+        public virtual bool CanExecute(object parameter)
+        {
+            return this.canExecute is null
+                || this.canExecute();
+        }
+
+        /// <inheritdoc />
+        public event EventHandler CanExecuteChanged
+        {
+            add { CommandManager.RequerySuggested += value; }
+            remove { CommandManager.RequerySuggested -= value; }
+        }
+
+        public event EventHandler Executed;
+
+        public event EventHandler Executing;
+
+        protected void OnExecuted()
+        {
+            this.Executed?.Invoke(this, null);
+        }
+
+        protected void OnExecuting()
+        {
+            this.Executing?.Invoke(this, null);
+        }
+
+        public void Execute(object parameter)
+        {
+            this.OnExecuting();
+
+            this.InvokeAction(parameter);
+
+            this.OnExecuted();
+        }
+
+        protected virtual void InvokeAction(object parameter)
+        {
+            this.action();
+        }
+
+        #endregion // IRelayCommand Members
+    }
+
+    /// <summary>
+    /// A command whose sole purpose is to
+    /// relay its functionality to other
+    /// objects by invoking delegates. The
+    /// default return value for the CanExecute
+    /// method is 'true'.
+    /// </summary>
+    public class RelayCommand<T> : RelayCommand
+    {
+        private readonly Action<T> action;
+        private readonly Func<T, bool> canExecute;
+
+        protected RelayCommand()
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="RelayCommand{T}"/> class.
+        /// </summary>
+        /// <param name="action">The execution logic.</param>
+        public RelayCommand(Action<T> action)
+            : this(action, null)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="RelayCommand{T}"/> class.
+        /// </summary>
+        /// <param name="action">The execution logic.</param>
+        /// <param name="canExecute">The execution status logic.</param>
+        public RelayCommand(Action<T> action, Func<T, bool> canExecute)
+        {
+            this.action = action;
+            this.canExecute = canExecute;
+        }
+
+        /// <summary>
+        /// Defines the method that determines whether the command can execute in its current state.
+        /// </summary>
+        /// <returns>
+        /// true if this command can be executed; otherwise, false.
+        /// </returns>
+        /// <param name="parameter">Data used by the command.  If the command does not require data to be passed, this object can be set to null.</param>
+        public override bool CanExecute(object parameter)
+        {
+            return this.canExecute is null
+                   || this.canExecute((T)parameter);
+        }
+
+        protected override void InvokeAction(object parameter)
+        {
+            this.action((T)parameter);
+        }
+    }
+}