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/***************************************************************************
                          controlobjectthread.h  -  description
                             -------------------
    begin                : Thu Sep 23 2004
    copyright            : (C) 2004 by Tue Haste Andersen
    email                : haste@diku.dk
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef CONTROLOBJECTTHREAD_H
#define CONTROLOBJECTTHREAD_H

#include <qmutex.h>
#include <qobject.h>
#include <qmutex.h>
#include <qwaitcondition.h>
#include <QQueue>

class ControlObject;


class ControlObjectThread : public QObject
{
    Q_OBJECT
public:
    ControlObjectThread(ControlObject *pControlObject, QObject* pParent=NULL);
    virtual ~ControlObjectThread();
    double get();
    virtual bool setExtern(double v);
    void add(double v);
    void sub(double v);
    static bool update();
    void emitValueChanged();


    // FIXME: Dangerous GED hack
    ControlObject* getControlObject();

public slots:
    void slotSet(double v);

        // The danger signal! This is for safety in wierd shutdown scenarios where the
        // ControlObject dies to avoid segfaults.
        void slotParentDead();

signals:
    void valueChanged(double);

protected:
    double m_dValue;
    static QMutex m_sqMutex;
    QMutex m_dataMutex;
    ControlObject *m_pControlObject;

private:
    virtual void updateControlObject();

    static QWaitCondition m_sqWait;
    static QQueue<ControlObjectThread*> m_sqQueue;
};

#endif