mono/mcs/class/WindowsBase/System.ComponentModel/CurrentChangingEventArgs.cs

// 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.
//
// Copyright (c) 2008 Novell, Inc. (http://www.novell.com)
//
// Authors:
//	Chris Toshok ([email protected])
//	Brian O'Keefe ([email protected])
//

using System;
using System.Windows;

namespace System.ComponentModel {

	public class CurrentChangingEventArgs : EventArgs
	{
		private bool canCancelEvent;
		private bool canceled;
	
		public CurrentChangingEventArgs ()
			:this(true)
		{
		}

		public CurrentChangingEventArgs (bool isCancelable)
		{
			canCancelEvent = isCancelable;
			canceled = false;
		}

		public bool Cancel {
			get { return canceled; }
			set {
				if(!IsCancelable && value)
					throw new InvalidOperationException("Cannot cancel an event that is not Cancelable.");
				canceled = value; 
			}
		}

		public bool IsCancelable {
			get { return canCancelEvent; }
		}
		
	}

}