SharpDevelop/samples/SharpSnippetCompiler/SharpSnippetCompiler.Core/DelegateCommand.cs

// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using System;
using System.Windows.Input;

namespace ICSharpCode.SharpSnippetCompiler.Core
{
	public class DelegateCommand : ICommand
	{
		Action<object> execute;
		Predicate<object> canExecute;
		
		public DelegateCommand(Action<object> execute, Predicate<object> canExecute)
		{
			this.execute = execute;
			this.canExecute = canExecute;
		}
		
		public DelegateCommand(Action<object> execute)
			: this(execute, null)
		{
		}
		
		public event EventHandler CanExecuteChanged {
			add { CommandManager.RequerySuggested += value; }
			remove { CommandManager.RequerySuggested -= value; }
		}
		
		public void Execute(object parameter)
		{
			execute(parameter);
		}
		
		public bool CanExecute(object parameter)
		{
			if (canExecute != null) {
				return canExecute(parameter);
			}
			return true;
		}
	}
}