class/System.Windows/System.ComponentModel/CurrentChangingEventArgs.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2008 Novell, Inc. (http://www.novell.com)
  21 //
  22 // Authors:
  23 //      Chris Toshok (toshok@ximian.com)
  24 //      Brian O'Keefe (zer0keefie@gmail.com)
  25 //
  26
  27 using System;
  28 using System.Windows;
  29
  30 namespace System.ComponentModel {
  31
  32         public class CurrentChangingEventArgs : EventArgs
  33         {
  34                 private bool canCancelEvent;
  35                 private bool canceled;
  36
  37                 public CurrentChangingEventArgs ()
  38                         :this(true)
  39                 {
  40                 }
  41
  42                 public CurrentChangingEventArgs (bool isCancelable)
  43                 {
  44                         canCancelEvent = isCancelable;
  45                         canceled = false;
  46                 }
  47
  48                 public bool Cancel {
  49                         get { return canceled; }
  50                         set {
  51                                 if(!IsCancelable && value)
  52                                         throw new InvalidOperationException("Cannot cancel an event that is not Cancelable.");
  53                                 canceled = value;
  54                         }
  55                 }
  56
  57                 public bool IsCancelable {
  58                         get { return canCancelEvent; }
  59                 }
  60
  61         }
  62
  63 }