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k3b/libk3b/core/k3bjob.h

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/*
*
* $Id: k3bjob.h 619556 2007-01-03 17:38:12Z trueg $
* Copyright (C) 2003 Sebastian Trueg <trueg@k3b.org>
*
* This file is part of the K3b project.
* Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
*
* 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.
* See the file "COPYING" for the exact licensing terms.
*/
#ifndef K3BJOB_H
#define K3BJOB_H
#include <tqobject.h>
#include <tqptrlist.h>
#include "k3bjobhandler.h"
#include "k3b_export.h"
class K3bDoc;
namespace K3bDevice {
class Device;
}
/**
* This is the baseclass for all the jobs in K3b which actually do the work like burning a cd!
* The K3bJob object takes care of registering with the k3bcore or with a parent K3bJob.
*
* Every job has a jobhandler which can be another job (in which case the job is handled as
* a subjob) or an arbitrary class implementing the K3bJobHandler interface.
*
* A Job should never create any widgets. User interaction should be done through the methods
* questionYesNo, waitForMedia.
*
* @author Sebastian Trueg
*/
class LIBK3B_EXPORT K3bJob : public TQObject, public K3bJobHandler
{
Q_OBJECT
TQ_OBJECT
public:
virtual ~K3bJob();
/**
* \reimplemented from K3bJobHandler
*/
bool isJob() const { return true; }
K3bJobHandler* jobHandler() const { return m_jobHandler; }
/**
* Is the job active?
* The default implementation is based on the jobStarted() and jobFinished()
* methods and there is normally no need to reimplement this.
*/
virtual bool active() const { return m_active; }
/**
* The default implementation is based on the canceled() signal.
*
* This means that one cannot count on this value being valid
* in a slot connected to the canceled() signal. It is, however, save
* to call this method from a slot connected to the finished() signal
* in case the job makes proper usage of the jobStarted/jobFinished
* methods.
*/
virtual bool hasBeenCanceled() const { return m_canceled; }
virtual TQString jobDescription() const { return "K3bJob"; }
virtual TQString jobDetails() const { return TQString(); }
/**
* @returns the number of running subjobs.
* this is useful for proper cancellation of jobs.
*/
unsigned int numRunningSubJobs() const;
const TQPtrList<K3bJob>& runningSubJobs() const { return m_runningSubJobs; }
/**
* \deprecated
*/
virtual void connectSubJob( K3bJob* subJob,
const char* finishedSlot = 0,
bool progress = false,
const char* progressSlot = 0,
const char* subProgressSot = 0,
const char* processedSizeSlot = 0,
const char* processedSubSizeSlot = 0 );
static const char* DEFAULT_SIGNAL_CONNECTION;
/**
* \param newTaskSlot If DEFAULT_SIGNAL_CONNECTION the newTask signal from the subjob will
* be connected to the newSubTask signal
* \param newSubTaskSlot If DEFAULT_SIGNAL_CONNECTION the newSubTask signal from the subjob
* will create an infoMessage signal
* \param progressSlot If DEFAULT_SIGNAL_CONNECTION the percent signal of the subjob will be
* connected to the subPercent signal.
* debuggingOutput and infoMessage will always be direcctly connected.
*
* If a parameter is set to 0 it will not be connected at all
*/
virtual void connectSubJob( K3bJob* subJob,
const char* finishedSlot = DEFAULT_SIGNAL_CONNECTION,
const char* newTaskSlot = DEFAULT_SIGNAL_CONNECTION,
const char* newSubTaskSlot = DEFAULT_SIGNAL_CONNECTION,
const char* progressSlot = DEFAULT_SIGNAL_CONNECTION,
const char* subProgressSlot = DEFAULT_SIGNAL_CONNECTION,
const char* processedSizeSlot = DEFAULT_SIGNAL_CONNECTION,
const char* processedSubSizeSlot = DEFAULT_SIGNAL_CONNECTION );
/**
* Message types to be used in combination with the infoMessage signal.
*
* \see infoMessage()
*/
enum MessageType {
INFO, /**< Informational message. For example a message that informs the user about what is
currently going on */
WARNING, /**< A warning message. Something did not go perfectly but the job may continue. */
ERROR, /**< An error. Only use this message type if the job will actually fail afterwards
with a call to jobFinished( false ) */
SUCCESS /**< This message type may be used to inform the user that a sub job has
been successfully finished. */
};
/**
* reimplemented from K3bJobHandler
*/
int waitForMedia( K3bDevice::Device*,
int mediaState = K3bDevice::STATE_EMPTY,
int mediaType = K3bDevice::MEDIA_WRITABLE_CD,
const TQString& message = TQString() );
/**
* reimplemented from K3bJobHandler
*/
bool questionYesNo( const TQString& text,
const TQString& caption = TQString(),
const TQString& yesText = TQString(),
const TQString& noText = TQString() );
/**
* reimplemented from K3bJobHandler
*/
void blockingInformation( const TQString& text,
const TQString& caption = TQString() );
public slots:
/**
* This is the slot that starts the job. The first call should always
* be jobStarted().
*
* Once the job has finished it has to call jobFinished() with the result as
* a parameter.
*
* \see jobStarted()
* \see jobFinished()
*/
virtual void start() = 0;
/**
* This slot should cancel the job. The job has to emit the canceled() signal and make a call
* to jobFinished().
* It is not important to do any of those two directly in this slot though.
*/
virtual void cancel() = 0;
void setJobHandler( K3bJobHandler* );
signals:
void infoMessage( const TQString& msg, int type );
void percent( int p );
void subPercent( int p );
void processedSize( int processed, int size );
void processedSubSize( int processed, int size );
void newTask( const TQString& job );
void newSubTask( const TQString& job );
void debuggingOutput(const TQString&, const TQString&);
void data( const char* data, int len );
void nextTrack( int track, int numTracks );
void canceled();
/**
* Emitted once the job has been started. Never emit this signal directly.
* Use jobStarted() instead, otherwise the job will not be properly registered
*/
void started();
/**
* Emitted once the job has been finshed. Never emit this signal directly.
* Use jobFinished() instead, otherwise the job will not be properly deregistered
*/
void finished( bool success );
protected:
/**
* \param hdl the handler of the job. This allows for some user interaction without
* specifying any details (like the GUI).
* The job handler can also be another job. In that case this job is a sub job
* and will be part of the parents running sub jobs.
*
* \see runningSubJobs()
* \see numRunningSubJobs()
*/
K3bJob( K3bJobHandler* hdl, TQObject* parent = 0, const char* name = 0 );
/**
* Call this in start() to properly register the job and emit the started() signal.
* Do never emit the started() signal manually.
*
* Always call K3bJob::jobStarted in reimplementations.
*/
virtual void jobStarted();
/**
* Call this at the end of the job to properly deregister the job and emit the finished() signal.
* Do never emit the started() signal manually.
*
* Always call K3bJob::jobFinished in reimplementations.
*/
virtual void jobFinished( bool success );
private slots:
void slotCanceled();
void slotNewSubTask( const TQString& str );
private:
void registerSubJob( K3bJob* );
void unregisterSubJob( K3bJob* );
K3bJobHandler* m_jobHandler;
TQPtrList<K3bJob> m_runningSubJobs;
bool m_canceled;
bool m_active;
class Private;
Private* d;
};
/**
* Every job used to actually burn a medium is derived from K3bBurnJob.
* This class implements additional signals like buffer status or writing speed
* as well as a handling of the used writing application.
*/
class LIBK3B_EXPORT K3bBurnJob : public K3bJob
{
Q_OBJECT
TQ_OBJECT
public:
K3bBurnJob( K3bJobHandler* hdl, TQObject* parent = 0, const char* name = 0 );
virtual ~K3bBurnJob();
/**
* The writing device used by this job.
*/
virtual K3bDevice::Device* writer() const { return 0; }
/**
* use K3b::WritingApp
*/
int writingApp() const { return m_writeMethod; }
/**
* K3b::WritingApp "ored" together
*/
virtual int supportedWritingApps() const;
public slots:
/**
* use K3b::WritingApp
*/
void setWritingApp( int w ) { m_writeMethod = w; }
signals:
void bufferStatus( int );
void deviceBuffer( int );
/**
* @param speed current writing speed in Kb
* @param multiplicator use 150 for CDs and 1380 for DVDs
* FIXME: maybe one should be able to ask the burnjob if it burns a CD or a DVD and remove the
* multiplicator parameter)
*/
void writeSpeed( int speed, int multiplicator );
/**
* This signal may be used to inform when the burning starts or ends
* The BurningProgressDialog for example uses it to enable and disable
* the buffer and writing speed displays.
*/
void burning(bool);
private:
int m_writeMethod;
class Private;
Private* d;
};
#endif