xref: /trunk/main/svx/source/sdr/event/eventhandler.cxx (revision cf6516809c57e1bb0a940545cca99cdad54d4ce2)

/**************************************************************
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svx.hxx"
#include <svx/sdr/event/eventhandler.hxx>

// for SOLARIS compiler include of algorithm part of _STL is necessary to
// get access to basic algos like ::std::find
#include <algorithm>
#include <tools/debug.hxx>

//////////////////////////////////////////////////////////////////////////////

namespace sdr
{
    namespace event
    {
        BaseEvent::BaseEvent(EventHandler& rEventHandler)
        :   mrEventHandler(rEventHandler)
        {
            mrEventHandler.AddEvent(*this);
        }

        BaseEvent::~BaseEvent()
        {
            mrEventHandler.RemoveEvent(*this);
        }
    } // end of namespace mixer
} // end of namespace sdr

//////////////////////////////////////////////////////////////////////////////

namespace sdr
{
    namespace event
    {
        void EventHandler::AddEvent(BaseEvent& rBaseEvent)
        {
            maVector.push_back(&rBaseEvent);
        }

        void EventHandler::RemoveEvent(BaseEvent& rBaseEvent)
        {
            if(maVector.back() == &rBaseEvent)
            {
                // the one to remove is the last, pop
                maVector.pop_back();
            }
            else
            {
                const BaseEventVector::iterator aFindResult = ::std::find(
                    maVector.begin(), maVector.end(), &rBaseEvent);
                DBG_ASSERT(aFindResult != maVector.end(),
                    "EventHandler::RemoveEvent: Event to be removed not found (!)");
                maVector.erase(aFindResult);
            }
        }

        BaseEvent* EventHandler::GetEvent()
        {
            if(!maVector.empty())
            {
                // get the last event, that one is fastest to be removed
                return maVector.back();
            }
            else
            {
                return 0L;
            }
        }

        EventHandler::EventHandler()
        {
        }

        EventHandler::~EventHandler()
        {
            while(!maVector.empty())
            {
                delete GetEvent();
            }
        }

        // Trigger and consume the events
        void EventHandler::ExecuteEvents()
        {
            for(;;)
            {
                BaseEvent* pEvent = GetEvent();
                if(pEvent == NULL)
                    break;
                pEvent->ExecuteEvent();
                delete pEvent;
            }
        }

        // for control
        sal_Bool EventHandler::IsEmpty() const
        {
            return (0L == maVector.size());
        }
    } // end of namespace mixer
} // end of namespace sdr

//////////////////////////////////////////////////////////////////////////////

namespace sdr
{
    namespace event
    {
        TimerEventHandler::TimerEventHandler(sal_uInt32 nTimeout)
        {
            SetTimeout(nTimeout);
            Stop();
        }

        TimerEventHandler::~TimerEventHandler()
        {
            Stop();
        }

        // The timer when it is triggered; from class Timer
        void TimerEventHandler::Timeout()
        {
            ExecuteEvents();
        }

        // reset the timer
        void TimerEventHandler::Restart()
        {
            Start();
        }
    } // end of namespace mixer
} // end of namespace sdr

//////////////////////////////////////////////////////////////////////////////
// eof