svx/source/inc/delayedevent.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef SVX_DELAYEDLINK_HXX
  21 #define SVX_DELAYEDLINK_HXX
  22
  23 #include <tools/link.hxx>
  24
  25 //........................................................................
  26 namespace svxform
  27 {
  28 //........................................................................
  29
  30     //====================================================================
  31     //= DelayedEvent
  32     //====================================================================
  33     /** small class which encapsulates posting a Link instance as ApplicationUserEvent
  34
  35         No thread safety at all here, just a little saving of code to type multiple times
  36     */
  37     class DelayedEvent
  38     {
  39     public:
  40         DelayedEvent( const Link& _rHandler )
  41             :m_aHandler( _rHandler )
  42             ,m_nEventId( 0 )
  43         {
  44         }
  45
  46         ~DelayedEvent()
  47         {
  48             CancelPendingCall();
  49         }
  50
  51         /** calls the handler asynchronously
  52
  53             If there's already a call pending, this previous call is cancelled.
  54         */
  55         void    Call( void* _pArg = NULL );
  56
  57         /** cancels a call which is currently pending
  58
  59             If no call is currently pending, then this is ignored.
  60         */
  61         void    CancelPendingCall();
  62
  63     private:
  64         Link    m_aHandler;
  65         sal_uLong   m_nEventId;
  66
  67     private:
  68         DECL_LINK( OnCall, void* );
  69
  70     private:
  71         DelayedEvent();                                  // never implemented
  72         DelayedEvent( const DelayedEvent& );              // never implemented
  73         DelayedEvent& operator=( const DelayedEvent& );   // never implemented
  74     };
  75
  76 //........................................................................
  77 } // namespace svxform
  78 //........................................................................
  79
  80 #endif // SVX_DELAYEDLINK_HXX
  81
  82 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */