summaryrefslogtreecommitdiffstats
path: root/libtdepim/progressmanager.h
blob: a447d49fbae1291c6edae775e0140516ecebd605 (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
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
/*
  progressmanager.h

  This file is part of KDEPIM.

  Author: Till Adam <adam@kde.org> (C) 2004

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Library General Public
  License as published by the Free Software Foundation; either
  version 2 of the License, or (at your option) any later version.

  This library 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
  Library General Public License for more details.

  You should have received a copy of the GNU Library General Public License
  along with this library; see the file COPYING.LIB.  If not, write to
  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  Boston, MA 02110-1301, USA.
*/

#ifndef __KPIM_PROGRESSMANAGER_H__
#define __KPIM_PROGRESSMANAGER_H__

#include <tqobject.h>
#include <tqdict.h>
#include <tqstring.h>

#include <tdepimmacros.h>

namespace KPIM {

class ProgressItem;
class ProgressManager;
typedef TQMap<ProgressItem*, bool> ProgressItemMap;

class KDE_EXPORT ProgressItem : public TQObject
{
  Q_OBJECT
  TQ_OBJECT
  friend class ProgressManager;
  friend class TQDict< ProgressItem >; // so it can be deleted from dicts

  public:

    /**
     * @return The id string which uniquely identifies the operation
     *         represented by this item.
     */
    const TQString& id() const { return mId; }

    /**
     * @return The parent item of this one, if there is one.
     */
    ProgressItem *parent() const { return mParent; }

    /**
     * @return The user visible string to be used to represent this item.
     */
    const TQString& label() const { return mLabel; }

    /**
     * @param v Set the user visible string identifying this item. @p v will
                be interpreted as rich text, so it might have to be escaped.
     */
    void setLabel( const TQString& v );

    /**
     * @return The string to be used for showing this item's current status.
     */
    const TQString& status() const { return mtqStatus; }
    /**
     * Set the string to be used for showing this item's current status.
     * @p v will be interpreted as rich text, so it might have to be escaped.
     * @param v The status string.
     */
    void setqStatus( const TQString& v );

    /**
     * @return Whether this item can be cancelled.
     */
    bool canBeCanceled() const { return mCanBeCanceled; }

    /**
     * @return Whether this item uses secure communication
     * (Account uses ssl, for example.).
     */
    bool usesCrypto() const { return mUsesCrypto; }

    /**
     * Set whether this item uses crypted communication, so listeners
     * can display a nice crypto icon.
     * @param v The value.
     */
    void setUsesCrypto( bool v );

    /**
     * @return whether this item uses a busy indicator instead of real progress display
     */
    bool usesBusyIndicator() const { return mUsesBusyIndicator; }

    /**
     * Sets whether this item uses a busy indicator instead of real progress for its progress bar.
     * If it uses a busy indicator, you are still responsible for calling setProgress() from time to
     * time to update the busy indicator.
     */
    void setUsesBusyIndicator( bool useBusyIndicator );

    /**
     * @return The current progress value of this item in percent.
     */
    unsigned int progress() const { return mProgress; }

    /**
     * Set the progress (percentage of completion) value of this item.
     * @param v The percentage value.
     */
    void setProgress( unsigned int v );

    /**
     * Tell the item it has finished. This will emit progressItemCompleted()
     * result in the destruction of the item after all slots connected to this
     * signal have executed. This is the only way to get rid of an item and
     * needs to be called even if the item is cancelled. Don't use the item
     * after this has been called on it.
     */
    void setComplete();

    /**
     * Reset the progress value of this item to 0 and the status string to
     * the empty string.
     */
    void reset() { setProgress( 0 ); setqStatus( TQString() ); mCompleted = 0; }

    void cancel();

    // Often needed values for calculating progress.
    void setTotalItems( unsigned int v ) { mTotal = v; }
    unsigned int totalItems() const { return mTotal; }
    void setCompletedItems( unsigned int v ) { mCompleted = v; }
    void incCompletedItems( unsigned int v = 1 ) { mCompleted += v; }
    unsigned int completedItems() const { return mCompleted; }

    /**
     * Recalculate progress according to total/completed items and update.
     */
    void updateProgress() { setProgress( mTotal? mCompleted*100/mTotal: 0 ); }

    void addChild( ProgressItem *kiddo );
    void removeChild( ProgressItem *kiddo );

    bool canceled() const { return mCanceled; }

signals:
    /**
     * Emitted when a new ProgressItem is added.
     * @param The ProgressItem that was added.
     */
    void progressItemAdded( KPIM::ProgressItem* );
    /**
     * Emitted when the progress value of an item changes.
     * @param  The item which got a new value.
     * @param  The value, for convenience.
     */
    void progressItemProgress( KPIM::ProgressItem*, unsigned int );
    /**
     * Emitted when a progress item was completed. The item will be
     * deleted afterwards, so slots connected to this are the last
     * chance to work with this item.
     * @param The completed item.
     */
    void progressItemCompleted( KPIM::ProgressItem* );
    /**
     * Emitted when an item was cancelled. It will _not_ go away immediately,
     * only when the owner sets it complete, which will usually happen. Can be
     * used to visually indicate the cancelled status of an item. Should be used
     * by the owner of the item to make sure it is set completed even if it is
     * cancelled. There is a ProgressManager::slotStandardCancelHandler which
     * simply sets the item completed and can be used if no other work needs to
     * be done on cancel.
     * @param The canceled item;
     */
    void progressItemCanceled( KPIM::ProgressItem* );
    /**
     * Emitted when the status message of an item changed. Should be used by
     * progress dialogs to update the status message for an item.
     * @param  The updated item.
     * @param  The new message.
     */
    void progressItemtqStatus( KPIM::ProgressItem*, const TQString& );
    /**
     * Emitted when the label of an item changed. Should be used by
     * progress dialogs to update the label of an item.
     * @param  The updated item.
     * @param  The new label.
     */
    void progressItemLabel( KPIM::ProgressItem*, const TQString& );
    /**
     * Emitted when the crypto status of an item changed. Should be used by
     * progress dialogs to update the crypto indicator of an item.
     * @param  The updated item.
     * @param  The new state.
     */
    void progressItemUsesCrypto( KPIM::ProgressItem*, bool );

    /**
     * Emitted when the busy indicator state of an item changes. Should be used
     * by progress dialogs so that they can adjust the display of the progress bar
     * to the new mode.
     * @param item The updated item
     * @param value True if the item uses a busy indicator now, false otherwise
     */
    void progressItemUsesBusyIndicator( KPIM::ProgressItem *item, bool value );


  protected:
    /* Only to be used by our good friend the ProgressManager */
    ProgressItem( ProgressItem* parent,
                             const TQString& id,
                             const TQString& label,
                             const TQString& status,
                             bool isCancellable,
                             bool usesCrypto );
    virtual ~ProgressItem();


  private:
    TQString mId;
    TQString mLabel;
    TQString mtqStatus;
    ProgressItem* mParent;
    bool mCanBeCanceled;
    unsigned int mProgress;
    ProgressItemMap mChildren;
    unsigned int mTotal;
    unsigned int mCompleted;
    bool mWaitingForKids;
    bool mCanceled;
    bool mUsesCrypto;
    bool mUsesBusyIndicator;
};

/**
 * The ProgressManager singleton keeps track of all ongoing transactions
 * and notifies observers (progress dialogs) when their progress percent value
 * changes, when they are completed (by their owner), and when they are canceled.
 * Each ProgressItem emits those signals individually and the singleton
 * broadcasts them. Use the ::createProgressItem() statics to acquire an item
 * and then call ->setProgress( int percent ) on it everytime you want to update
 * the item and ->setComplete() when the operation is done. This will delete the
 * item. Connect to the item's progressItemCanceled() signal to be notified when
 * the user cancels the transaction using one of the observing progress dialogs
 * or by calling item->cancel() in some other way. The owner is responsible for
 * calling setComplete() on the item, even if it is canceled. Use the
 * standardCancelHandler() slot if that is all you want to do on cancel.
 *
 * Note that if you request an item with a certain id and there is already
 * one with that id, there will not be a new one created but the existing
 * one will be returned. This is convenient for accessing items that are
 * needed regularly without the to store a pointer to them or to add child
 * items to parents by id.
 */

class KDE_EXPORT ProgressManager : public TQObject
{

  Q_OBJECT
  TQ_OBJECT

  public:
    virtual ~ProgressManager();

    /**
     * @return The singleton instance of this class.
     */
    static ProgressManager * instance();

    /**
     * Use this to aquire a unique id number which can be used to discern
     * an operation from all others going on at the same time. Use that
     * number as the id string for your progressItem to ensure it is unique.
     * @return
     */
    static TQString getUniqueID() { return TQString::number( ++uID ); }

     /**
      * Creates a ProgressItem with a unique id and the given label.
      * This is the simplest way to aquire a progress item. It will not
      * have a parent and will be set to be cancellable and not using crypto.
      *
      * @param label The text to be displayed by progress handlers. It will be
      *              interpreted as rich text, so it might have to be escaped.
      */
     static ProgressItem * createProgressItem( const TQString &label ) {
       return instance()->createProgressItemImpl( 0, getUniqueID(), label,
                                                  TQString(), true, false );
     }

    /**
     * Creates a new progressItem with the given parent, id, label and initial
     * status.
     *
     * @param parent Specify an already existing item as the parent of this one.
     * @param id Used to identify this operation for cancel and progress info.
     * @param label The text to be displayed by progress handlers. It will be
     *              interpreted as rich text, so it might have to be escaped.
     * @param status Additional text to be displayed for the item. It will be
     *               interpreted as rich text, so it might have to be escaped.
     * @param canBeCanceled can the user cancel this operation?
     * @param usesCrypto does the operation use secure transports (SSL)
     * Cancelling the parent will cancel the tqchildren as well (if they can be
     * cancelled) and ongoing tqchildren prevent parents from finishing.
     * @return The ProgressItem representing the operation.
     */
     static ProgressItem * createProgressItem( ProgressItem* parent,
                                               const TQString& id,
                                               const TQString& label,
                                               const TQString& status = TQString(),
                                               bool canBeCanceled = true,
                                               bool usesCrypto = false ) {
       return instance()->createProgressItemImpl( parent, id, label, status,
                                                  canBeCanceled, usesCrypto );
     }

     /**
      * Use this version if you have the id string of the parent and want to
      * add a subjob to it.
      */
     static ProgressItem * createProgressItem( const TQString& parent,
                                               const TQString& id,
                                               const TQString& label,
                                               const TQString& status = TQString(),
                                               bool canBeCanceled = true,
                                               bool usesCrypto = false ) {
       return instance()->createProgressItemImpl( parent, id, label,
                                                 status, canBeCanceled, usesCrypto );
     }

     /**
      * Version without a parent.
      */
     static ProgressItem * createProgressItem( const TQString& id,
                                               const TQString& label,
                                               const TQString& status = TQString(),
                                               bool canBeCanceled = true,
                                               bool usesCrypto = false ) {
       return instance()->createProgressItemImpl( 0, id, label, status,
                                                  canBeCanceled, usesCrypto );
     }


    /**
     * @return true when there is no more progress item
     */
    bool isEmpty() const { return mTransactions.isEmpty(); }

    /**
     * @return the only top level progressitem when there's only one.
     * Returns 0 if there is no item, or more than one top level item.
     * Since this is used to calculate the overall progress, it will also return
     * 0 if there is an item which uses a busy indicator, since that will tqinvalidate
     * the overall progress.
     */
    ProgressItem* singleItem() const;

    /**
     * Ask all listeners to show the progress dialog, because there is
     * something that wants to be shown.
     */
    static void emitShowProgressDialog() {
       instance()->emitShowProgressDialogImpl();
    }

  signals:
    /** @see ProgressItem::progressItemAdded() */
    void progressItemAdded( KPIM::ProgressItem* );
    /** @see ProgressItem::progressItemProgress() */
    void progressItemProgress( KPIM::ProgressItem*, unsigned int );
    /** @see ProgressItem::progressItemCompleted() */
    void progressItemCompleted( KPIM::ProgressItem* );
    /** @see ProgressItem::progressItemCanceled() */
    void progressItemCanceled( KPIM::ProgressItem* );
    /** @see ProgressItem::progressItemtqStatus() */
    void progressItemtqStatus( KPIM::ProgressItem*, const TQString& );
    /** @see ProgressItem::progressItemLabel() */
    void progressItemLabel( KPIM::ProgressItem*, const TQString& );
    /** @see ProgressItem::progressItemUsesCrypto() */
    void progressItemUsesCrypto( KPIM::ProgressItem*, bool );
    /** @see ProgressItem::progressItemUsesBusyIndicator */
    void progressItemUsesBusyIndicator( KPIM::ProgressItem*, bool );

    /**
     * Emitted when an operation requests the listeners to be shown.
     * Use emitShowProgressDialog() to trigger it.
     */
    void showProgressDialog();
  public slots:

    /**
     * Calls setCompleted() on the item, to make sure it goes away.
     * Provided for convenience.
     * @param item the canceled item.
     */
    void slotStandardCancelHandler( KPIM::ProgressItem* item );

    /**
     * Aborts all running jobs. Bound to "Esc"
     */
    void slotAbortAll();

  private slots:
    void slotTransactionCompleted( KPIM::ProgressItem *item );

  private:
    ProgressManager();
     // prevent unsolicited copies
    ProgressManager( const ProgressManager& );

    virtual ProgressItem* createProgressItemImpl(
                ProgressItem* parent, const TQString& id,
                const TQString& label, const TQString& status,
                bool cancellable, bool usesCrypto );
    virtual ProgressItem* createProgressItemImpl(
                const TQString& parent,  const TQString& id,
                const TQString& label, const TQString& status,
                bool cancellable, bool usesCrypto );
    void emitShowProgressDialogImpl();

    TQDict< ProgressItem > mTransactions;
    static ProgressManager *mInstance;
    static unsigned int uID;
};

}

#endif // __KPIM_PROGRESSMANAGER_H__