svx/source/sdr/event/eventhandler.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   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 #include <svx/sdr/event/eventhandler.hxx>
  21
  22 // for SOLARIS compiler include of algorithm part of _STL is necessary to
  23 // get access to basic algos like ::std::find
  24 #include <algorithm>
  25 #include <tools/debug.hxx>
  26
  27 //////////////////////////////////////////////////////////////////////////////
  28
  29 namespace sdr
  30 {
  31     namespace event
  32     {
  33         BaseEvent::BaseEvent(EventHandler& rEventHandler)
  34         :   mrEventHandler(rEventHandler)
  35         {
  36             mrEventHandler.AddEvent(*this);
  37         }
  38
  39         BaseEvent::~BaseEvent()
  40         {
  41             mrEventHandler.RemoveEvent(*this);
  42         }
  43     } // end of namespace mixer
  44 } // end of namespace sdr
  45
  46 //////////////////////////////////////////////////////////////////////////////
  47
  48 namespace sdr
  49 {
  50     namespace event
  51     {
  52         void EventHandler::AddEvent(BaseEvent& rBaseEvent)
  53         {
  54             maVector.push_back(&rBaseEvent);
  55         }
  56
  57         void EventHandler::RemoveEvent(BaseEvent& rBaseEvent)
  58         {
  59             if(maVector.back() == &rBaseEvent)
  60             {
  61                 // the one to remove is the last, pop
  62                 maVector.pop_back();
  63             }
  64             else
  65             {
  66                 const BaseEventVector::iterator aFindResult = ::std::find(
  67                     maVector.begin(), maVector.end(), &rBaseEvent);
  68                 DBG_ASSERT(aFindResult != maVector.end(),
  69                     "EventHandler::RemoveEvent: Event to be removed not found (!)");
  70                 maVector.erase(aFindResult);
  71             }
  72         }
  73
  74         BaseEvent* EventHandler::GetEvent()
  75         {
  76             if(!maVector.empty())
  77             {
  78                 // get the last event, that one is fastest to be removed
  79                 return maVector.back();
  80             }
  81             else
  82             {
  83                 return 0L;
  84             }
  85         }
  86
  87         EventHandler::EventHandler()
  88         {
  89         }
  90
  91         EventHandler::~EventHandler()
  92         {
  93             while(!maVector.empty())
  94             {
  95                 delete GetEvent();
  96             }
  97         }
  98
  99         // Trigger and consume the events
 100         void EventHandler::ExecuteEvents()
 101         {
 102             for(;;)
 103             {
 104                 BaseEvent* pEvent = GetEvent();
 105                 if(pEvent == NULL)
 106                     break;
 107                 pEvent->ExecuteEvent();
 108                 delete pEvent;
 109             }
 110         }
 111
 112         // for control
 113         bool EventHandler::IsEmpty() const
 114         {
 115             return (0L == maVector.size());
 116         }
 117     } // end of namespace mixer
 118 } // end of namespace sdr
 119
 120 //////////////////////////////////////////////////////////////////////////////
 121
 122 namespace sdr
 123 {
 124     namespace event
 125     {
 126         TimerEventHandler::TimerEventHandler(sal_uInt32 nTimeout)
 127         {
 128             SetTimeout(nTimeout);
 129             Stop();
 130         }
 131
 132         TimerEventHandler::~TimerEventHandler()
 133         {
 134             Stop();
 135         }
 136
 137         // The timer when it is triggered; from class Timer
 138         void TimerEventHandler::Timeout()
 139         {
 140             ExecuteEvents();
 141         }
 142
 143         // reset the timer
 144         void TimerEventHandler::Restart()
 145         {
 146             Start();
 147         }
 148     } // end of namespace mixer
 149 } // end of namespace sdr
 150
 151 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */