class/WindowsBase/System.Windows.Threading/DispatcherHooks.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) 2006 Novell, Inc. (http://www.novell.com)
  21 //
  22 // Authors:
  23 //      Miguel de Icaza (miguel@novell.com)
  24 //
  25 using System;
  26 using System.Collections;
  27 using System.Collections.Generic;
  28 using System.ComponentModel;
  29 using System.Threading;
  30
  31 namespace System.Windows.Threading {
  32
  33         public sealed class DispatcherHooks {
  34                 Dispatcher owner;
  35
  36                 internal DispatcherHooks (Dispatcher owner)
  37                 {
  38                         this.owner = owner;
  39                 }
  40
  41                 public event EventHandler DispatcherInactive;
  42                 public event DispatcherHookEventHandler OperationAborted;
  43                 public event DispatcherHookEventHandler OperationCompleted;
  44                 public event DispatcherHookEventHandler OperationPosted;
  45                 public event DispatcherHookEventHandler OperationPriorityChanged;
  46
  47                 internal void EmitOperationPosted (DispatcherOperation op)
  48                 {
  49                         DispatcherHookEventHandler posted = OperationPosted;
  50                         if (posted != null)
  51                                 posted (owner, new DispatcherHookEventArgs (op));
  52                 }
  53
  54                 internal void EmitOperationCompleted (DispatcherOperation op)
  55                 {
  56                         DispatcherHookEventHandler completed = OperationCompleted;
  57                         if (completed != null)
  58                                 completed (owner, new DispatcherHookEventArgs (op));
  59                 }
  60
  61                 internal void EmitOperationAborted (DispatcherOperation op)
  62                 {
  63                         DispatcherHookEventHandler aborted = OperationAborted;
  64                         if (aborted != null)
  65                                 aborted (owner, new DispatcherHookEventArgs (op));
  66                 }
  67
  68                 internal void EmitOperationPriorityChanged (DispatcherOperation op)
  69                 {
  70                         DispatcherHookEventHandler prio = OperationPriorityChanged;
  71                         if (prio != null)
  72                                 prio (owner, new DispatcherHookEventArgs (op));
  73                 }
  74
  75                 internal void EmitInactive ()
  76                 {
  77                         EventHandler inactive = DispatcherInactive;
  78                         if (inactive != null)
  79                                 inactive (owner, EventArgs.Empty);
  80                 }
  81         }
  82 }