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/***************************************************************************
* Copyright (C) 2007 by Ken Werner *
* ken.werner@web.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef THREADEDTRIGGER_H
#define THREADEDTRIGGER_H
#include "source.h"
#include "updateevent.h"
#include "triggeredsource.h"
#include <tqwaitcondition.h>
#include <tqmutex.h>
#include <tqthread.h>
#include <tqevent.h>
#include <tqobject.h>
/**
* ThreadedTrigger calls the fetchValue method of a source asynchronous using a thread
* @author Ken Werner
*/
class ThreadedTrigger : public TQObject, TQThread{
Q_OBJECT
//macro which activates signals and slots (moc)
public:
/**
* Creates a new ThreadedTrigger
*/
ThreadedTrigger(TriggeredSource* inSource, unsigned long inRefreshSleep = 1000);
virtual ~ThreadedTrigger();
protected:
/**
* fetches tcalls the fetchValue method periodically
* and sends an UpdateEvent to the source
*/
virtual void run();
protected slots:
/**
* enables (starts the thread) or disables (stops the thread)
* this method is called if mSource gets enabled or disabled
*/
void enable(bool inEnable);
private:
/**
* pointer to the TriggeredSource
**/
TriggeredSource* mSource;
/**
* time in milli seconds between two value fetches
*/
unsigned long mRefreshSleep;
/**
* indicates whether this thread runs
*/
bool mRunning;
/*
* this is the condition, on which this thread sleeps
* mRefreshSleep milliseconds.
*/
TQWaitCondition mWaitCond;
/*
* this mutex ensures that the thread always sleeps on the
* condition, if we signal it.
*/
TQMutex mWaitMutex;
};
#endif //THREADEDTRIGGER_H
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