src/qt/transactiontablemodel.cpp

   1 // Copyright (c) 2011-2017 The Bitcoin Core developers
   2 // Distributed under the MIT software license, see the accompanying
   3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4
   5 #include <qt/transactiontablemodel.h>
   6
   7 #include <qt/addresstablemodel.h>
   8 #include <qt/guiconstants.h>
   9 #include <qt/guiutil.h>
  10 #include <qt/optionsmodel.h>
  11 #include <qt/platformstyle.h>
  12 #include <qt/transactiondesc.h>
  13 #include <qt/transactionrecord.h>
  14 #include <qt/walletmodel.h>
  15
  16 #include <core_io.h>
  17 #include <validation.h>
  18 #include <sync.h>
  19 #include <uint256.h>
  20 #include <util.h>
  21 #include <wallet/wallet.h>
  22
  23 #include <QColor>
  24 #include <QDateTime>
  25 #include <QDebug>
  26 #include <QIcon>
  27 #include <QList>
  28
  29 // Amount column is right-aligned it contains numbers
  30 static int column_alignments[] = {
  31         Qt::AlignLeft|Qt::AlignVCenter, /* status */
  32         Qt::AlignLeft|Qt::AlignVCenter, /* watchonly */
  33         Qt::AlignLeft|Qt::AlignVCenter, /* date */
  34         Qt::AlignLeft|Qt::AlignVCenter, /* type */
  35         Qt::AlignLeft|Qt::AlignVCenter, /* address */
  36         Qt::AlignRight|Qt::AlignVCenter /* amount */
  37     };
  38
  39 // Comparison operator for sort/binary search of model tx list
  40 struct TxLessThan
  41 {
  42     bool operator()(const TransactionRecord &a, const TransactionRecord &b) const
  43     {
  44         return a.hash < b.hash;
  45     }
  46     bool operator()(const TransactionRecord &a, const uint256 &b) const
  47     {
  48         return a.hash < b;
  49     }
  50     bool operator()(const uint256 &a, const TransactionRecord &b) const
  51     {
  52         return a < b.hash;
  53     }
  54 };
  55
  56 // Private implementation
  57 class TransactionTablePriv
  58 {
  59 public:
  60     TransactionTablePriv(CWallet *_wallet, TransactionTableModel *_parent) :
  61         wallet(_wallet),
  62         parent(_parent)
  63     {
  64     }
  65
  66     CWallet *wallet;
  67     TransactionTableModel *parent;
  68
  69     /* Local cache of wallet.
  70      * As it is in the same order as the CWallet, by definition
  71      * this is sorted by sha256.
  72      */
  73     QList<TransactionRecord> cachedWallet;
  74
  75     /* Query entire wallet anew from core.
  76      */
  77     void refreshWallet()
  78     {
  79         qDebug() << "TransactionTablePriv::refreshWallet";
  80         cachedWallet.clear();
  81         {
  82             LOCK2(cs_main, wallet->cs_wallet);
  83             for (const auto& entry : wallet->mapWallet)
  84             {
  85                 if (TransactionRecord::showTransaction(entry.second))
  86                     cachedWallet.append(TransactionRecord::decomposeTransaction(wallet, entry.second));
  87             }
  88         }
  89     }
  90
  91     /* Update our model of the wallet incrementally, to synchronize our model of the wallet
  92        with that of the core.
  93
  94        Call with transaction that was added, removed or changed.
  95      */
  96     void updateWallet(const uint256 &hash, int status, bool showTransaction)
  97     {
  98         qDebug() << "TransactionTablePriv::updateWallet: " + QString::fromStdString(hash.ToString()) + " " + QString::number(status);
  99
 100         // Find bounds of this transaction in model
 101         QList<TransactionRecord>::iterator lower = qLowerBound(
 102             cachedWallet.begin(), cachedWallet.end(), hash, TxLessThan());
 103         QList<TransactionRecord>::iterator upper = qUpperBound(
 104             cachedWallet.begin(), cachedWallet.end(), hash, TxLessThan());
 105         int lowerIndex = (lower - cachedWallet.begin());
 106         int upperIndex = (upper - cachedWallet.begin());
 107         bool inModel = (lower != upper);
 108
 109         if(status == CT_UPDATED)
 110         {
 111             if(showTransaction && !inModel)
 112                 status = CT_NEW; /* Not in model, but want to show, treat as new */
 113             if(!showTransaction && inModel)
 114                 status = CT_DELETED; /* In model, but want to hide, treat as deleted */
 115         }
 116
 117         qDebug() << "    inModel=" + QString::number(inModel) +
 118                     " Index=" + QString::number(lowerIndex) + "-" + QString::number(upperIndex) +
 119                     " showTransaction=" + QString::number(showTransaction) + " derivedStatus=" + QString::number(status);
 120
 121         switch(status)
 122         {
 123         case CT_NEW:
 124             if(inModel)
 125             {
 126                 qWarning() << "TransactionTablePriv::updateWallet: Warning: Got CT_NEW, but transaction is already in model";
 127                 break;
 128             }
 129             if(showTransaction)
 130             {
 131                 LOCK2(cs_main, wallet->cs_wallet);
 132                 // Find transaction in wallet
 133                 std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(hash);
 134                 if(mi == wallet->mapWallet.end())
 135                 {
 136                     qWarning() << "TransactionTablePriv::updateWallet: Warning: Got CT_NEW, but transaction is not in wallet";
 137                     break;
 138                 }
 139                 // Added -- insert at the right position
 140                 QList<TransactionRecord> toInsert =
 141                         TransactionRecord::decomposeTransaction(wallet, mi->second);
 142                 if(!toInsert.isEmpty()) /* only if something to insert */
 143                 {
 144                     parent->beginInsertRows(QModelIndex(), lowerIndex, lowerIndex+toInsert.size()-1);
 145                     int insert_idx = lowerIndex;
 146                     for (const TransactionRecord &rec : toInsert)
 147                     {
 148                         cachedWallet.insert(insert_idx, rec);
 149                         insert_idx += 1;
 150                     }
 151                     parent->endInsertRows();
 152                 }
 153             }
 154             break;
 155         case CT_DELETED:
 156             if(!inModel)
 157             {
 158                 qWarning() << "TransactionTablePriv::updateWallet: Warning: Got CT_DELETED, but transaction is not in model";
 159                 break;
 160             }
 161             // Removed -- remove entire transaction from table
 162             parent->beginRemoveRows(QModelIndex(), lowerIndex, upperIndex-1);
 163             cachedWallet.erase(lower, upper);
 164             parent->endRemoveRows();
 165             break;
 166         case CT_UPDATED:
 167             // Miscellaneous updates -- nothing to do, status update will take care of this, and is only computed for
 168             // visible transactions.
 169             for (int i = lowerIndex; i < upperIndex; i++) {
 170                 TransactionRecord *rec = &cachedWallet[i];
 171                 rec->status.needsUpdate = true;
 172             }
 173             break;
 174         }
 175     }
 176
 177     int size()
 178     {
 179         return cachedWallet.size();
 180     }
 181
 182     TransactionRecord *index(int idx)
 183     {
 184         if(idx >= 0 && idx < cachedWallet.size())
 185         {
 186             TransactionRecord *rec = &cachedWallet[idx];
 187
 188             // Get required locks upfront. This avoids the GUI from getting
 189             // stuck if the core is holding the locks for a longer time - for
 190             // example, during a wallet rescan.
 191             //
 192             // If a status update is needed (blocks came in since last check),
 193             //  update the status of this transaction from the wallet. Otherwise,
 194             // simply re-use the cached status.
 195             TRY_LOCK(cs_main, lockMain);
 196             if(lockMain)
 197             {
 198                 TRY_LOCK(wallet->cs_wallet, lockWallet);
 199                 if(lockWallet && rec->statusUpdateNeeded())
 200                 {
 201                     std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(rec->hash);
 202
 203                     if(mi != wallet->mapWallet.end())
 204                     {
 205                         rec->updateStatus(mi->second);
 206                     }
 207                 }
 208             }
 209             return rec;
 210         }
 211         return 0;
 212     }
 213
 214     QString describe(TransactionRecord *rec, int unit)
 215     {
 216         {
 217             LOCK2(cs_main, wallet->cs_wallet);
 218             std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(rec->hash);
 219             if(mi != wallet->mapWallet.end())
 220             {
 221                 return TransactionDesc::toHTML(wallet, mi->second, rec, unit);
 222             }
 223         }
 224         return QString();
 225     }
 226
 227     QString getTxHex(TransactionRecord *rec)
 228     {
 229         LOCK2(cs_main, wallet->cs_wallet);
 230         std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(rec->hash);
 231         if(mi != wallet->mapWallet.end())
 232         {
 233             std::string strHex = EncodeHexTx(*mi->second.tx);
 234             return QString::fromStdString(strHex);
 235         }
 236         return QString();
 237     }
 238 };
 239
 240 TransactionTableModel::TransactionTableModel(const PlatformStyle *_platformStyle, CWallet* _wallet, WalletModel *parent):
 241         QAbstractTableModel(parent),
 242         wallet(_wallet),
 243         walletModel(parent),
 244         priv(new TransactionTablePriv(_wallet, this)),
 245         fProcessingQueuedTransactions(false),
 246         platformStyle(_platformStyle)
 247 {
 248     columns << QString() << QString() << tr("Date") << tr("Type") << tr("Label") << BitcoinUnits::getAmountColumnTitle(walletModel->getOptionsModel()->getDisplayUnit());
 249     priv->refreshWallet();
 250
 251     connect(walletModel->getOptionsModel(), SIGNAL(displayUnitChanged(int)), this, SLOT(updateDisplayUnit()));
 252
 253     subscribeToCoreSignals();
 254 }
 255
 256 TransactionTableModel::~TransactionTableModel()
 257 {
 258     unsubscribeFromCoreSignals();
 259     delete priv;
 260 }
 261
 262 /** Updates the column title to "Amount (DisplayUnit)" and emits headerDataChanged() signal for table headers to react. */
 263 void TransactionTableModel::updateAmountColumnTitle()
 264 {
 265     columns[Amount] = BitcoinUnits::getAmountColumnTitle(walletModel->getOptionsModel()->getDisplayUnit());
 266     Q_EMIT headerDataChanged(Qt::Horizontal,Amount,Amount);
 267 }
 268
 269 void TransactionTableModel::updateTransaction(const QString &hash, int status, bool showTransaction)
 270 {
 271     uint256 updated;
 272     updated.SetHex(hash.toStdString());
 273
 274     priv->updateWallet(updated, status, showTransaction);
 275 }
 276
 277 void TransactionTableModel::updateConfirmations()
 278 {
 279     // Blocks came in since last poll.
 280     // Invalidate status (number of confirmations) and (possibly) description
 281     //  for all rows. Qt is smart enough to only actually request the data for the
 282     //  visible rows.
 283     Q_EMIT dataChanged(index(0, Status), index(priv->size()-1, Status));
 284     Q_EMIT dataChanged(index(0, ToAddress), index(priv->size()-1, ToAddress));
 285 }
 286
 287 int TransactionTableModel::rowCount(const QModelIndex &parent) const
 288 {
 289     Q_UNUSED(parent);
 290     return priv->size();
 291 }
 292
 293 int TransactionTableModel::columnCount(const QModelIndex &parent) const
 294 {
 295     Q_UNUSED(parent);
 296     return columns.length();
 297 }
 298
 299 QString TransactionTableModel::formatTxStatus(const TransactionRecord *wtx) const
 300 {
 301     QString status;
 302
 303     switch(wtx->status.status)
 304     {
 305     case TransactionStatus::OpenUntilBlock:
 306         status = tr("Open for %n more block(s)","",wtx->status.open_for);
 307         break;
 308     case TransactionStatus::OpenUntilDate:
 309         status = tr("Open until %1").arg(GUIUtil::dateTimeStr(wtx->status.open_for));
 310         break;
 311     case TransactionStatus::Offline:
 312         status = tr("Offline");
 313         break;
 314     case TransactionStatus::Unconfirmed:
 315         status = tr("Unconfirmed");
 316         break;
 317     case TransactionStatus::Abandoned:
 318         status = tr("Abandoned");
 319         break;
 320     case TransactionStatus::Confirming:
 321         status = tr("Confirming (%1 of %2 recommended confirmations)").arg(wtx->status.depth).arg(TransactionRecord::RecommendedNumConfirmations);
 322         break;
 323     case TransactionStatus::Confirmed:
 324         status = tr("Confirmed (%1 confirmations)").arg(wtx->status.depth);
 325         break;
 326     case TransactionStatus::Conflicted:
 327         status = tr("Conflicted");
 328         break;
 329     case TransactionStatus::Immature:
 330         status = tr("Immature (%1 confirmations, will be available after %2)").arg(wtx->status.depth).arg(wtx->status.depth + wtx->status.matures_in);
 331         break;
 332     case TransactionStatus::MaturesWarning:
 333         status = tr("This block was not received by any other nodes and will probably not be accepted!");
 334         break;
 335     case TransactionStatus::NotAccepted:
 336         status = tr("Generated but not accepted");
 337         break;
 338     }
 339
 340     return status;
 341 }
 342
 343 QString TransactionTableModel::formatTxDate(const TransactionRecord *wtx) const
 344 {
 345     if(wtx->time)
 346     {
 347         return GUIUtil::dateTimeStr(wtx->time);
 348     }
 349     return QString();
 350 }
 351
 352 /* Look up address in address book, if found return label (address)
 353    otherwise just return (address)
 354  */
 355 QString TransactionTableModel::lookupAddress(const std::string &address, bool tooltip) const
 356 {
 357     QString label = walletModel->getAddressTableModel()->labelForAddress(QString::fromStdString(address));
 358     QString description;
 359     if(!label.isEmpty())
 360     {
 361         description += label;
 362     }
 363     if(label.isEmpty() || tooltip)
 364     {
 365         description += QString(" (") + QString::fromStdString(address) + QString(")");
 366     }
 367     return description;
 368 }
 369
 370 QString TransactionTableModel::formatTxType(const TransactionRecord *wtx) const
 371 {
 372     switch(wtx->type)
 373     {
 374     case TransactionRecord::RecvWithAddress:
 375         return tr("Received with");
 376     case TransactionRecord::RecvFromOther:
 377         return tr("Received from");
 378     case TransactionRecord::SendToAddress:
 379     case TransactionRecord::SendToOther:
 380         return tr("Sent to");
 381     case TransactionRecord::SendToSelf:
 382         return tr("Payment to yourself");
 383     case TransactionRecord::Generated:
 384         return tr("Mined");
 385     default:
 386         return QString();
 387     }
 388 }
 389
 390 QVariant TransactionTableModel::txAddressDecoration(const TransactionRecord *wtx) const
 391 {
 392     switch(wtx->type)
 393     {
 394     case TransactionRecord::Generated:
 395         return QIcon(":/icons/tx_mined");
 396     case TransactionRecord::RecvWithAddress:
 397     case TransactionRecord::RecvFromOther:
 398         return QIcon(":/icons/tx_input");
 399     case TransactionRecord::SendToAddress:
 400     case TransactionRecord::SendToOther:
 401         return QIcon(":/icons/tx_output");
 402     default:
 403         return QIcon(":/icons/tx_inout");
 404     }
 405 }
 406
 407 QString TransactionTableModel::formatTxToAddress(const TransactionRecord *wtx, bool tooltip) const
 408 {
 409     QString watchAddress;
 410     if (tooltip) {
 411         // Mark transactions involving watch-only addresses by adding " (watch-only)"
 412         watchAddress = wtx->involvesWatchAddress ? QString(" (") + tr("watch-only") + QString(")") : "";
 413     }
 414
 415     switch(wtx->type)
 416     {
 417     case TransactionRecord::RecvFromOther:
 418         return QString::fromStdString(wtx->address) + watchAddress;
 419     case TransactionRecord::RecvWithAddress:
 420     case TransactionRecord::SendToAddress:
 421     case TransactionRecord::Generated:
 422         return lookupAddress(wtx->address, tooltip) + watchAddress;
 423     case TransactionRecord::SendToOther:
 424         return QString::fromStdString(wtx->address) + watchAddress;
 425     case TransactionRecord::SendToSelf:
 426     default:
 427         return tr("(n/a)") + watchAddress;
 428     }
 429 }
 430
 431 QVariant TransactionTableModel::addressColor(const TransactionRecord *wtx) const
 432 {
 433     // Show addresses without label in a less visible color
 434     switch(wtx->type)
 435     {
 436     case TransactionRecord::RecvWithAddress:
 437     case TransactionRecord::SendToAddress:
 438     case TransactionRecord::Generated:
 439         {
 440         QString label = walletModel->getAddressTableModel()->labelForAddress(QString::fromStdString(wtx->address));
 441         if(label.isEmpty())
 442             return COLOR_BAREADDRESS;
 443         } break;
 444     case TransactionRecord::SendToSelf:
 445         return COLOR_BAREADDRESS;
 446     default:
 447         break;
 448     }
 449     return QVariant();
 450 }
 451
 452 QString TransactionTableModel::formatTxAmount(const TransactionRecord *wtx, bool showUnconfirmed, BitcoinUnits::SeparatorStyle separators) const
 453 {
 454     QString str = BitcoinUnits::format(walletModel->getOptionsModel()->getDisplayUnit(), wtx->credit + wtx->debit, false, separators);
 455     if(showUnconfirmed)
 456     {
 457         if(!wtx->status.countsForBalance)
 458         {
 459             str = QString("[") + str + QString("]");
 460         }
 461     }
 462     return QString(str);
 463 }
 464
 465 QVariant TransactionTableModel::txStatusDecoration(const TransactionRecord *wtx) const
 466 {
 467     switch(wtx->status.status)
 468     {
 469     case TransactionStatus::OpenUntilBlock:
 470     case TransactionStatus::OpenUntilDate:
 471         return COLOR_TX_STATUS_OPENUNTILDATE;
 472     case TransactionStatus::Offline:
 473         return COLOR_TX_STATUS_OFFLINE;
 474     case TransactionStatus::Unconfirmed:
 475         return QIcon(":/icons/transaction_0");
 476     case TransactionStatus::Abandoned:
 477         return QIcon(":/icons/transaction_abandoned");
 478     case TransactionStatus::Confirming:
 479         switch(wtx->status.depth)
 480         {
 481         case 1: return QIcon(":/icons/transaction_1");
 482         case 2: return QIcon(":/icons/transaction_2");
 483         case 3: return QIcon(":/icons/transaction_3");
 484         case 4: return QIcon(":/icons/transaction_4");
 485         default: return QIcon(":/icons/transaction_5");
 486         };
 487     case TransactionStatus::Confirmed:
 488         return QIcon(":/icons/transaction_confirmed");
 489     case TransactionStatus::Conflicted:
 490         return QIcon(":/icons/transaction_conflicted");
 491     case TransactionStatus::Immature: {
 492         int total = wtx->status.depth + wtx->status.matures_in;
 493         int part = (wtx->status.depth * 4 / total) + 1;
 494         return QIcon(QString(":/icons/transaction_%1").arg(part));
 495         }
 496     case TransactionStatus::MaturesWarning:
 497     case TransactionStatus::NotAccepted:
 498         return QIcon(":/icons/transaction_0");
 499     default:
 500         return COLOR_BLACK;
 501     }
 502 }
 503
 504 QVariant TransactionTableModel::txWatchonlyDecoration(const TransactionRecord *wtx) const
 505 {
 506     if (wtx->involvesWatchAddress)
 507         return QIcon(":/icons/eye");
 508     else
 509         return QVariant();
 510 }
 511
 512 QString TransactionTableModel::formatTooltip(const TransactionRecord *rec) const
 513 {
 514     QString tooltip = formatTxStatus(rec) + QString("\n") + formatTxType(rec);
 515     if(rec->type==TransactionRecord::RecvFromOther || rec->type==TransactionRecord::SendToOther ||
 516        rec->type==TransactionRecord::SendToAddress || rec->type==TransactionRecord::RecvWithAddress)
 517     {
 518         tooltip += QString(" ") + formatTxToAddress(rec, true);
 519     }
 520     return tooltip;
 521 }
 522
 523 QVariant TransactionTableModel::data(const QModelIndex &index, int role) const
 524 {
 525     if(!index.isValid())
 526         return QVariant();
 527     TransactionRecord *rec = static_cast<TransactionRecord*>(index.internalPointer());
 528
 529     switch(role)
 530     {
 531     case RawDecorationRole:
 532         switch(index.column())
 533         {
 534         case Status:
 535             return txStatusDecoration(rec);
 536         case Watchonly:
 537             return txWatchonlyDecoration(rec);
 538         case ToAddress:
 539             return txAddressDecoration(rec);
 540         }
 541         break;
 542     case Qt::DecorationRole:
 543     {
 544         QIcon icon = qvariant_cast<QIcon>(index.data(RawDecorationRole));
 545         return platformStyle->TextColorIcon(icon);
 546     }
 547     case Qt::DisplayRole:
 548         switch(index.column())
 549         {
 550         case Date:
 551             return formatTxDate(rec);
 552         case Type:
 553             return formatTxType(rec);
 554         case ToAddress:
 555             return formatTxToAddress(rec, false);
 556         case Amount:
 557             return formatTxAmount(rec, true, BitcoinUnits::separatorAlways);
 558         }
 559         break;
 560     case Qt::EditRole:
 561         // Edit role is used for sorting, so return the unformatted values
 562         switch(index.column())
 563         {
 564         case Status:
 565             return QString::fromStdString(rec->status.sortKey);
 566         case Date:
 567             return rec->time;
 568         case Type:
 569             return formatTxType(rec);
 570         case Watchonly:
 571             return (rec->involvesWatchAddress ? 1 : 0);
 572         case ToAddress:
 573             return formatTxToAddress(rec, true);
 574         case Amount:
 575             return qint64(rec->credit + rec->debit);
 576         }
 577         break;
 578     case Qt::ToolTipRole:
 579         return formatTooltip(rec);
 580     case Qt::TextAlignmentRole:
 581         return column_alignments[index.column()];
 582     case Qt::ForegroundRole:
 583         // Use the "danger" color for abandoned transactions
 584         if(rec->status.status == TransactionStatus::Abandoned)
 585         {
 586             return COLOR_TX_STATUS_DANGER;
 587         }
 588         // Non-confirmed (but not immature) as transactions are grey
 589         if(!rec->status.countsForBalance && rec->status.status != TransactionStatus::Immature)
 590         {
 591             return COLOR_UNCONFIRMED;
 592         }
 593         if(index.column() == Amount && (rec->credit+rec->debit) < 0)
 594         {
 595             return COLOR_NEGATIVE;
 596         }
 597         if(index.column() == ToAddress)
 598         {
 599             return addressColor(rec);
 600         }
 601         break;
 602     case TypeRole:
 603         return rec->type;
 604     case DateRole:
 605         return QDateTime::fromTime_t(static_cast<uint>(rec->time));
 606     case WatchonlyRole:
 607         return rec->involvesWatchAddress;
 608     case WatchonlyDecorationRole:
 609         return txWatchonlyDecoration(rec);
 610     case LongDescriptionRole:
 611         return priv->describe(rec, walletModel->getOptionsModel()->getDisplayUnit());
 612     case AddressRole:
 613         return QString::fromStdString(rec->address);
 614     case LabelRole:
 615         return walletModel->getAddressTableModel()->labelForAddress(QString::fromStdString(rec->address));
 616     case AmountRole:
 617         return qint64(rec->credit + rec->debit);
 618     case TxIDRole:
 619         return rec->getTxID();
 620     case TxHashRole:
 621         return QString::fromStdString(rec->hash.ToString());
 622     case TxHexRole:
 623         return priv->getTxHex(rec);
 624     case TxPlainTextRole:
 625         {
 626             QString details;
 627             QDateTime date = QDateTime::fromTime_t(static_cast<uint>(rec->time));
 628             QString txLabel = walletModel->getAddressTableModel()->labelForAddress(QString::fromStdString(rec->address));
 629
 630             details.append(date.toString("M/d/yy HH:mm"));
 631             details.append(" ");
 632             details.append(formatTxStatus(rec));
 633             details.append(". ");
 634             if(!formatTxType(rec).isEmpty()) {
 635                 details.append(formatTxType(rec));
 636                 details.append(" ");
 637             }
 638             if(!rec->address.empty()) {
 639                 if(txLabel.isEmpty())
 640                     details.append(tr("(no label)") + " ");
 641                 else {
 642                     details.append("(");
 643                     details.append(txLabel);
 644                     details.append(") ");
 645                 }
 646                 details.append(QString::fromStdString(rec->address));
 647                 details.append(" ");
 648             }
 649             details.append(formatTxAmount(rec, false, BitcoinUnits::separatorNever));
 650             return details;
 651         }
 652     case ConfirmedRole:
 653         return rec->status.countsForBalance;
 654     case FormattedAmountRole:
 655         // Used for copy/export, so don't include separators
 656         return formatTxAmount(rec, false, BitcoinUnits::separatorNever);
 657     case StatusRole:
 658         return rec->status.status;
 659     }
 660     return QVariant();
 661 }
 662
 663 QVariant TransactionTableModel::headerData(int section, Qt::Orientation orientation, int role) const
 664 {
 665     if(orientation == Qt::Horizontal)
 666     {
 667         if(role == Qt::DisplayRole)
 668         {
 669             return columns[section];
 670         }
 671         else if (role == Qt::TextAlignmentRole)
 672         {
 673             return column_alignments[section];
 674         } else if (role == Qt::ToolTipRole)
 675         {
 676             switch(section)
 677             {
 678             case Status:
 679                 return tr("Transaction status. Hover over this field to show number of confirmations.");
 680             case Date:
 681                 return tr("Date and time that the transaction was received.");
 682             case Type:
 683                 return tr("Type of transaction.");
 684             case Watchonly:
 685                 return tr("Whether or not a watch-only address is involved in this transaction.");
 686             case ToAddress:
 687                 return tr("User-defined intent/purpose of the transaction.");
 688             case Amount:
 689                 return tr("Amount removed from or added to balance.");
 690             }
 691         }
 692     }
 693     return QVariant();
 694 }
 695
 696 QModelIndex TransactionTableModel::index(int row, int column, const QModelIndex &parent) const
 697 {
 698     Q_UNUSED(parent);
 699     TransactionRecord *data = priv->index(row);
 700     if(data)
 701     {
 702         return createIndex(row, column, priv->index(row));
 703     }
 704     return QModelIndex();
 705 }
 706
 707 void TransactionTableModel::updateDisplayUnit()
 708 {
 709     // emit dataChanged to update Amount column with the current unit
 710     updateAmountColumnTitle();
 711     Q_EMIT dataChanged(index(0, Amount), index(priv->size()-1, Amount));
 712 }
 713
 714 // queue notifications to show a non freezing progress dialog e.g. for rescan
 715 struct TransactionNotification
 716 {
 717 public:
 718     TransactionNotification() {}
 719     TransactionNotification(uint256 _hash, ChangeType _status, bool _showTransaction):
 720         hash(_hash), status(_status), showTransaction(_showTransaction) {}
 721
 722     void invoke(QObject *ttm)
 723     {
 724         QString strHash = QString::fromStdString(hash.GetHex());
 725         qDebug() << "NotifyTransactionChanged: " + strHash + " status= " + QString::number(status);
 726         QMetaObject::invokeMethod(ttm, "updateTransaction", Qt::QueuedConnection,
 727                                   Q_ARG(QString, strHash),
 728                                   Q_ARG(int, status),
 729                                   Q_ARG(bool, showTransaction));
 730     }
 731 private:
 732     uint256 hash;
 733     ChangeType status;
 734     bool showTransaction;
 735 };
 736
 737 static bool fQueueNotifications = false;
 738 static std::vector< TransactionNotification > vQueueNotifications;
 739
 740 static void NotifyTransactionChanged(TransactionTableModel *ttm, CWallet *wallet, const uint256 &hash, ChangeType status)
 741 {
 742     // Find transaction in wallet
 743     std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(hash);
 744     // Determine whether to show transaction or not (determine this here so that no relocking is needed in GUI thread)
 745     bool inWallet = mi != wallet->mapWallet.end();
 746     bool showTransaction = (inWallet && TransactionRecord::showTransaction(mi->second));
 747
 748     TransactionNotification notification(hash, status, showTransaction);
 749
 750     if (fQueueNotifications)
 751     {
 752         vQueueNotifications.push_back(notification);
 753         return;
 754     }
 755     notification.invoke(ttm);
 756 }
 757
 758 static void ShowProgress(TransactionTableModel *ttm, const std::string &title, int nProgress)
 759 {
 760     if (nProgress == 0)
 761         fQueueNotifications = true;
 762
 763     if (nProgress == 100)
 764     {
 765         fQueueNotifications = false;
 766         if (vQueueNotifications.size() > 10) // prevent balloon spam, show maximum 10 balloons
 767             QMetaObject::invokeMethod(ttm, "setProcessingQueuedTransactions", Qt::QueuedConnection, Q_ARG(bool, true));
 768         for (unsigned int i = 0; i < vQueueNotifications.size(); ++i)
 769         {
 770             if (vQueueNotifications.size() - i <= 10)
 771                 QMetaObject::invokeMethod(ttm, "setProcessingQueuedTransactions", Qt::QueuedConnection, Q_ARG(bool, false));
 772
 773             vQueueNotifications[i].invoke(ttm);
 774         }
 775         std::vector<TransactionNotification >().swap(vQueueNotifications); // clear
 776     }
 777 }
 778
 779 void TransactionTableModel::subscribeToCoreSignals()
 780 {
 781     // Connect signals to wallet
 782     wallet->NotifyTransactionChanged.connect(boost::bind(NotifyTransactionChanged, this, _1, _2, _3));
 783     wallet->ShowProgress.connect(boost::bind(ShowProgress, this, _1, _2));
 784 }
 785
 786 void TransactionTableModel::unsubscribeFromCoreSignals()
 787 {
 788     // Disconnect signals from wallet
 789     wallet->NotifyTransactionChanged.disconnect(boost::bind(NotifyTransactionChanged, this, _1, _2, _3));
 790     wallet->ShowProgress.disconnect(boost::bind(ShowProgress, this, _1, _2));
 791 }