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/***************************************************************************
object.h: abstract base class for all Kst objects
-------------------
begin : May 22, 2003
copyright : (C) 2003 The University of Toronto
email : netterfield@astro.utoronto.ca
***************************************************************************/
/***************************************************************************
* *
* 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 OBJECT_H
#define OBJECT_H
#include <QPointer>
#include <QMutex>
#include <QObject>
#include <QString>
#include <QDebug>
#include <QStringList>
#include <QMetaType>
#include <QXmlStreamWriter>
#include "namedobject.h"
#include "kst_export.h"
#include "sharedptr.h"
#include "rwlock.h"
namespace Kst {
class ObjectStore;
class Object;
typedef SharedPtr<Object> ObjectPtr;
class KSTCORE_EXPORT Object : public QObject, public Shared, public KstRWLock, public NamedObject
{
Q_OBJECT
public:
static QString type();
static const qint64 Forced = -1;
static const qint64 NoInputs = -2;
enum UpdateType { NoChange = 0, Updated, Deferred };
virtual UpdateType objectUpdate(qint64 newSerial);
virtual void registerChange() {_serial = Forced; emit dirty();}
virtual void reset();
qint64 serial() const {return _serial;}
qint64 serialOfLastChange() const {return _serialOfLastChange;}
virtual const QString& typeString() const;
static const QString staticTypeString;
ObjectStore *store() const;
// Returns count - 2 to account for "this" and the list pointer, therefore
// you MUST have a reference-counted pointer to call this function
virtual int getUsage() const;
virtual void deleteDependents();
virtual void internalUpdate() = 0;
virtual bool used() const {return _used;}
virtual void setUsed(bool used_in) {_used = used_in;}
virtual bool uses(ObjectPtr p) const;
protected:
Object();
virtual ~Object();
friend class ObjectStore;
ObjectStore *_store; // set by ObjectStore
virtual qint64 minInputSerial() const = 0;
virtual qint64 maxInputSerialOfLastChange() const = 0;
qint64 _serial;
qint64 _serialOfLastChange;
bool _used;
signals:
void dirty();
};
}
Q_DECLARE_METATYPE(Kst::Object*)
#endif
// vim: ts=2 sw=2 et
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