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68 lines
2.9 KiB
68 lines
2.9 KiB
/***************************************************************************
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* Copyright (C) 2007 by Ken Werner *
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* ken.werner@web.de *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#include "threadedtrigger.h"
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#include <qapplication.h>
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//#include "kdebug.h"
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ThreadedTrigger::ThreadedTrigger(TriggeredSource* inSource, unsigned long inRefreshSleep):
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mSource(inSource),
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mRefreshSleep(inRefreshSleep),
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mRunning(false)
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{
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connect(mSource, SIGNAL(enabledChanged(bool, Source*)), this, SLOT(enable(bool)));
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}
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ThreadedTrigger::~ThreadedTrigger(){
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enable(false);
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}
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void ThreadedTrigger::enable(bool inEnable){
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if(inEnable && !mRunning){ // start this thread (calls run())
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//kdDebug() << "start thread " << mSource->getName() << endl;
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// start the thread
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mRunning = true;
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this->start(QThread::LowPriority);
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}else if(!inEnable && mRunning){ // stops the thread
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//kdDebug() << "stop thread " << mSource->getName() << endl;
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mRunning = false;
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mWaitMutex.lock();
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mWaitCond.wakeOne();
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mWaitMutex.unlock();
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this->wait();
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}
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}
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void ThreadedTrigger::run(){
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mWaitMutex.lock();
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while( mRunning ) {
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QString text = mSource->fetchValue();
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UpdateEvent* ue = new UpdateEvent(text); // Qt will delete the ue when done
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QApplication::postEvent(mSource, ue); // send the event to the TriggeredSource
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if(mWaitCond.wait(&mWaitMutex, mRefreshSleep))
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break; // we were woken up
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}
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// if we are here, the mutex must be locked:
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// 1. QWaitCondition::wait locks it when it returns
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// 2. mWaitMutex is locked when we enter the loop
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mWaitMutex.unlock(); // unlock it again
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}
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