summaryrefslogtreecommitdiffstats
path: root/libk3b/core/k3bjob.h
blob: 95af1925e6c6f52ed3a957c2647d8977504e6b57 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
/*
 *
 * $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
{
  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
{
  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