text: // Copyright (c) 2011-2014 The Bitcoin developers
  // Distributed under the MIT/X11 software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include "transactiontablemodel.h"
  
  #include "addresstablemodel.h"
  #include "guiconstants.h"
  #include "guiutil.h"
  #include "optionsmodel.h"
  #include "transactiondesc.h"
  #include "transactionrecord.h"
  #include "walletmodel.h"
  
  #include "main.h"
  #include "sync.h"
  #include "uint256.h"
  #include "util.h"
  #include "wallet.h"
  
  #include <QColor>
  #include <QDateTime>
  #include <QDebug>
  #include <QIcon>
  #include <QList>
  
  // Amount column is right-aligned it contains numbers
  static int column_alignments[] = {
      Qt::AlignLeft | Qt::AlignVCenter, /* status */
      Qt::AlignLeft | Qt::AlignVCenter, /* watchonly */
      Qt::AlignLeft | Qt::AlignVCenter, /* date */
      Qt::AlignLeft | Qt::AlignVCenter, /* type */
      Qt::AlignLeft | Qt::AlignVCenter, /* address */
      Qt::AlignRight | Qt::AlignVCenter /* amount */
  };
  
  // Comparison operator for sort/binary search of model tx list
  struct TxLessThan {
      bool operator()(const TransactionRecord& a, const TransactionRecord& b) const
      {
          return a.hash < b.hash;
      }
      bool operator()(const TransactionRecord& a, const uint256& b) const
      {
          return a.hash < b;
      }
      bool operator()(const uint256& a, const TransactionRecord& b) const
      {
          return a < b.hash;
      }
  };
  
  // Private implementation
  class TransactionTablePriv
  {
  public:
      TransactionTablePriv(CWallet* wallet, TransactionTableModel* parent) : wallet(wallet),
                                                                             parent(parent)
      {
      }
  
      CWallet* wallet;
      TransactionTableModel* parent;
  
      /* Local cache of wallet.
       * As it is in the same order as the CWallet, by definition
       * this is sorted by sha256.
       */
      QList<TransactionRecord> cachedWallet;
  
      /* Query entire wallet anew from core.
       */
      void refreshWallet()
      {
          qDebug() << "TransactionTablePriv::refreshWallet";
          cachedWallet.clear();
          {
              LOCK2(cs_main, wallet->cs_wallet);
              for (std::map<uint256, CWalletTx>::iterator it = wallet->mapWallet.begin(); it != wallet->mapWallet.end(); ++it) {
                  if (TransactionRecord::showTransaction(it->second))
                      cachedWallet.append(TransactionRecord::decomposeTransaction(wallet, it->second));
              }
          }
      }
  
      /* Update our model of the wallet incrementally, to synchronize our model of the wallet
         with that of the core.
  
         Call with transaction that was added, removed or changed.
       */
      void updateWallet(const uint256& hash, int status, bool showTransaction)
      {
          qDebug() << "TransactionTablePriv::updateWallet : " + QString::fromStdString(hash.ToString()) + " " + QString::number(status);
  
          // Find bounds of this transaction in model
          QList<TransactionRecord>::iterator lower = qLowerBound(
              cachedWallet.begin(), cachedWallet.end(), hash, TxLessThan());
          QList<TransactionRecord>::iterator upper = qUpperBound(
              cachedWallet.begin(), cachedWallet.end(), hash, TxLessThan());
          int lowerIndex = (lower - cachedWallet.begin());
          int upperIndex = (upper - cachedWallet.begin());
          bool inModel = (lower != upper);
  
          if (status == CT_UPDATED) {
              if (showTransaction && !inModel)
                  status = CT_NEW; /* Not in model, but want to show, treat as new */
              if (!showTransaction && inModel)
                  status = CT_DELETED; /* In model, but want to hide, treat as deleted */
          }
  
          qDebug() << "    inModel=" + QString::number(inModel) +
                          " Index=" + QString::number(lowerIndex) + "-" + QString::number(upperIndex) +
                          " showTransaction=" + QString::number(showTransaction) + " derivedStatus=" + QString::number(status);
  
          switch (status) {
          case CT_NEW:
              if (inModel) {
                  qWarning() << "TransactionTablePriv::updateWallet : Warning: Got CT_NEW, but transaction is already in model";
                  break;
              }
              if (showTransaction) {
                  LOCK2(cs_main, wallet->cs_wallet);
                  // Find transaction in wallet
                  std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(hash);
                  if (mi == wallet->mapWallet.end()) {
                      qWarning() << "TransactionTablePriv::updateWallet : Warning: Got CT_NEW, but transaction is not in wallet";
                      break;
                  }
                  // Added -- insert at the right position
                  QList<TransactionRecord> toInsert =
                      TransactionRecord::decomposeTransaction(wallet, mi->second);
                  if (!toInsert.isEmpty()) /* only if something to insert */
                  {
                      parent->beginInsertRows(QModelIndex(), lowerIndex, lowerIndex + toInsert.size() - 1);
                      int insert_idx = lowerIndex;
                      foreach (const TransactionRecord& rec, toInsert) {
                          cachedWallet.insert(insert_idx, rec);
                          insert_idx += 1;
                      }
                      parent->endInsertRows();
                  }
              }
              break;
          case CT_DELETED:
              if (!inModel) {
                  qWarning() << "TransactionTablePriv::updateWallet : Warning: Got CT_DELETED, but transaction is not in model";
                  break;
              }
              // Removed -- remove entire transaction from table
              parent->beginRemoveRows(QModelIndex(), lowerIndex, upperIndex - 1);
              cachedWallet.erase(lower, upper);
              parent->endRemoveRows();
              break;
          case CT_UPDATED:
              // Miscellaneous updates -- nothing to do, status update will take care of this, and is only computed for
              // visible transactions.
              break;
          }
      }
  
      int size()
      {
          return cachedWallet.size();
      }
  
      TransactionRecord* index(int idx)
      {
          if (idx >= 0 && idx < cachedWallet.size()) {
              TransactionRecord* rec = &cachedWallet[idx];
  
              // Get required locks upfront. This avoids the GUI from getting
              // stuck if the core is holding the locks for a longer time - for
              // example, during a wallet rescan.
              //
              // If a status update is needed (blocks came in since last check),
              //  update the status of this transaction from the wallet. Otherwise,
              // simply re-use the cached status.
              TRY_LOCK(cs_main, lockMain);
              if (lockMain) {
                  TRY_LOCK(wallet->cs_wallet, lockWallet);
                  if (lockWallet && rec->statusUpdateNeeded()) {
                      std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(rec->hash);
  
                      if (mi != wallet->mapWallet.end()) {
                          rec->updateStatus(mi->second);
                      }
                  }
              }
              return rec;
          }
          return 0;
      }
  
      QString describe(TransactionRecord* rec, int unit)
      {
          {
              LOCK2(cs_main, wallet->cs_wallet);
              std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(rec->hash);
              if (mi != wallet->mapWallet.end()) {
                  return TransactionDesc::toHTML(wallet, mi->second, rec, unit);
              }
          }
          return QString();
      }
  };
  
  TransactionTableModel::TransactionTableModel(CWallet* wallet, WalletModel* parent) : QAbstractTableModel(parent),
                                                                                       wallet(wallet),
                                                                                       walletModel(parent),
                                                                                       priv(new TransactionTablePriv(wallet, this)),
                                                                                       fProcessingQueuedTransactions(false)
  {
      columns << QString() << QString() << tr("Date") << tr("Type") << tr("Address") << BitcoinUnits::getAmountColumnTitle(walletModel->getOptionsModel()->getDisplayUnit());
      priv->refreshWallet();
  
      connect(walletModel->getOptionsModel(), SIGNAL(displayUnitChanged(int)), this, SLOT(updateDisplayUnit()));
  
      subscribeToCoreSignals();
  }
  
  TransactionTableModel::~TransactionTableModel()
  {
      unsubscribeFromCoreSignals();
      delete priv;
  }
  
  /** Updates the column title to "Amount (DisplayUnit)" and emits headerDataChanged() signal for table headers to react. */
  void TransactionTableModel::updateAmountColumnTitle()
  {
      columns[Amount] = BitcoinUnits::getAmountColumnTitle(walletModel->getOptionsModel()->getDisplayUnit());
      emit headerDataChanged(Qt::Horizontal, Amount, Amount);
  }
  
  void TransactionTableModel::updateTransaction(const QString& hash, int status, bool showTransaction)
  {
      uint256 updated;
      updated.SetHex(hash.toStdString());
  
      priv->updateWallet(updated, status, showTransaction);
  }
  
  void TransactionTableModel::updateConfirmations()
  {
      // Blocks came in since last poll.
      // Invalidate status (number of confirmations) and (possibly) description
      //  for all rows. Qt is smart enough to only actually request the data for the
      //  visible rows.
      emit dataChanged(index(0, Status), index(priv->size() - 1, Status));
      emit dataChanged(index(0, ToAddress), index(priv->size() - 1, ToAddress));
  }
  
  int TransactionTableModel::rowCount(const QModelIndex& parent) const
  {
      Q_UNUSED(parent);
      return priv->size();
  }
  
  int TransactionTableModel::columnCount(const QModelIndex& parent) const
  {
      Q_UNUSED(parent);
      return columns.length();
  }
  
  QString TransactionTableModel::formatTxStatus(const TransactionRecord* wtx) const
  {
      QString status;
  
      switch (wtx->status.status) {
      case TransactionStatus::OpenUntilBlock:
          status = tr("Open for %n more block(s)", "", wtx->status.open_for);
          break;
      case TransactionStatus::OpenUntilDate:
          status = tr("Open until %1").arg(GUIUtil::dateTimeStr(wtx->status.open_for));
          break;
      case TransactionStatus::Offline:
          status = tr("Offline");
          break;
      case TransactionStatus::Unconfirmed:
          status = tr("Unconfirmed");
          break;
      case TransactionStatus::Confirming:
          status = tr("Confirming (%1 of %2 recommended confirmations)").arg(wtx->status.depth).arg(TransactionRecord::RecommendedNumConfirmations);
          break;
      case TransactionStatus::Confirmed:
          status = tr("Confirmed (%1 confirmations)").arg(wtx->status.depth);
          break;
      case TransactionStatus::Conflicted:
          status = tr("Conflicted");
          break;
      case TransactionStatus::Immature:
          status = tr("Immature (%1 confirmations, will be available after %2)").arg(wtx->status.depth).arg(wtx->status.depth + wtx->status.matures_in);
          break;
      case TransactionStatus::MaturesWarning:
          status = tr("This block was not received by any other nodes and will probably not be accepted!");
          break;
      case TransactionStatus::NotAccepted:
          status = tr("Orphan Block - Generated but not accepted. This does not impact your holdings.");
          break;
      }
  
      return status;
  }
  
  QString TransactionTableModel::formatTxDate(const TransactionRecord* wtx) const
  {
      if (wtx->time) {
          return GUIUtil::dateTimeStr(wtx->time);
      }
      return QString();
  }
  
  /* Look up address in address book, if found return label (address)
     otherwise just return (address)
   */
  QString TransactionTableModel::lookupAddress(const std::string& address, bool tooltip) const
  {
      QString label = walletModel->getAddressTableModel()->labelForAddress(QString::fromStdString(address));
      QString description;
      if (!label.isEmpty()) {
          description += label;
      }
      if (label.isEmpty() || tooltip) {
          description += QString(" (") + QString::fromStdString(address) + QString(")");
      }
      return description;
  }
  
  QString TransactionTableModel::formatTxType(const TransactionRecord* wtx) const
  {
      switch (wtx->type) {
      case TransactionRecord::RecvWithAddress:
          return tr("Received with");
      case TransactionRecord::MNReward:
          return tr("Masternode Reward");
      case TransactionRecord::FNReward:
          return tr("Fundamentalnode Reward");
      case TransactionRecord::RecvFromOther:
          return tr("Received from");
      case TransactionRecord::RecvWithObfuscation:
          return tr("Received via Obfuscation");
      case TransactionRecord::SendToAddress:
      case TransactionRecord::SendToOther:
          return tr("Sent to");
      case TransactionRecord::SendToSelf:
          return tr("Payment to yourself");
      case TransactionRecord::StakeMint:
          return tr("AXIV Stake");
      case TransactionRecord::Generated:
          return tr("Mined");
      default:
          return QString();
      }
  }
  
  QVariant TransactionTableModel::txAddressDecoration(const TransactionRecord* wtx) const
  {
      switch (wtx->type) {
      case TransactionRecord::Generated:
      case TransactionRecord::StakeMint:
          return QIcon(":/icons/tx_staked");
      case TransactionRecord::MNReward:
          return QIcon(":/icons/tx_masternode");
      case TransactionRecord::FNReward:
          return QIcon(":/icons/tx_fundamentalnode");
      case TransactionRecord::RecvWithAddress:
      case TransactionRecord::RecvFromOther:
          return QIcon(":/icons/tx_input");
      case TransactionRecord::SendToAddress:
      case TransactionRecord::SendToOther:
          return QIcon(":/icons/tx_output");
      default:
          return QIcon(":/icons/tx_inout");
      }
  }
  
  QString TransactionTableModel::formatTxToAddress(const TransactionRecord* wtx, bool tooltip) const
  {
      QString watchAddress;
      if (tooltip) {
          // Mark transactions involving watch-only addresses by adding " (watch-only)"
          watchAddress = wtx->involvesWatchAddress ? QString(" (") + tr("watch-only") + QString(")") : "";
      }
  
      switch (wtx->type) {
      case TransactionRecord::RecvFromOther:
          return QString::fromStdString(wtx->address) + watchAddress;
      case TransactionRecord::RecvWithAddress:
      case TransactionRecord::MNReward:
  	case TransactionRecord::FNReward:
      case TransactionRecord::RecvWithObfuscation:
      case TransactionRecord::SendToAddress:
      case TransactionRecord::Generated:
      case TransactionRecord::StakeMint:
          return lookupAddress(wtx->address, tooltip);
      case TransactionRecord::Obfuscated:
          return lookupAddress(wtx->address, tooltip) + watchAddress;
      case TransactionRecord::SendToOther:
          return QString::fromStdString(wtx->address) + watchAddress;
      case TransactionRecord::SendToSelf:
      default:
          return tr("(n/a)") + watchAddress;
      }
  }
  
  QVariant TransactionTableModel::addressColor(const TransactionRecord* wtx) const
  {
      switch (wtx->type) {
      case TransactionRecord::SendToSelf:
          return COLOR_BAREADDRESS;
      // Show addresses without label in a less visible color
      case TransactionRecord::RecvWithAddress:
      case TransactionRecord::SendToAddress:
      case TransactionRecord::Generated:
  	case TransactionRecord::FNReward:
      case TransactionRecord::MNReward: {
          QString label = walletModel->getAddressTableModel()->labelForAddress(QString::fromStdString(wtx->address));
          if (label.isEmpty())
              return COLOR_BAREADDRESS;
      }
      default:
          // To avoid overriding above conditional formats a default text color for this QTableView is not defined in stylesheet,
          // so we must always return a color here
          return COLOR_BLACK;
      }
  }
  
  QString TransactionTableModel::formatTxAmount(const TransactionRecord* wtx, bool showUnconfirmed, BitcoinUnits::SeparatorStyle separators) const
  {
      QString str = BitcoinUnits::format(walletModel->getOptionsModel()->getDisplayUnit(), wtx->credit + wtx->debit, false, separators);
      if (showUnconfirmed) {
          if (!wtx->status.countsForBalance) {
              str = QString("[") + str + QString("]");
          }
      }
      return QString(str);
  }
  
  QVariant TransactionTableModel::txStatusDecoration(const TransactionRecord* wtx) const
  {
      switch (wtx->status.status) {
      case TransactionStatus::OpenUntilBlock:
      case TransactionStatus::OpenUntilDate:
          return COLOR_TX_STATUS_OPENUNTILDATE;
      case TransactionStatus::Offline:
          return COLOR_TX_STATUS_OFFLINE;
      case TransactionStatus::Unconfirmed:
          return QIcon(":/icons/transaction_0");
      case TransactionStatus::Confirming:
          switch (wtx->status.depth) {
          case 1:
              return QIcon(":/icons/transaction_1");
          case 2:
              return QIcon(":/icons/transaction_2");
          case 3:
              return QIcon(":/icons/transaction_3");
          case 4:
              return QIcon(":/icons/transaction_4");
          default:
              return QIcon(":/icons/transaction_5");
          };
      case TransactionStatus::Confirmed:
          return QIcon(":/icons/transaction_confirmed");
      case TransactionStatus::Conflicted:
          return QIcon(":/icons/transaction_conflicted");
      case TransactionStatus::Immature: {
          int total = wtx->status.depth + wtx->status.matures_in;
          int part = (wtx->status.depth * 4 / total) + 1;
          return QIcon(QString(":/icons/transaction_%1").arg(part));
      }
      case TransactionStatus::MaturesWarning:
      case TransactionStatus::NotAccepted:
          return QIcon(":/icons/transaction_0");
      default:
          return COLOR_BLACK;
      }
  }
  
  QVariant TransactionTableModel::txWatchonlyDecoration(const TransactionRecord* wtx) const
  {
      if (wtx->involvesWatchAddress)
          return QIcon(":/icons/eye");
      else
          return QVariant();
  }
  
  QString TransactionTableModel::formatTooltip(const TransactionRecord* rec) const
  {
      QString tooltip = formatTxStatus(rec) + QString("\n") + formatTxType(rec);
      if (rec->type == TransactionRecord::RecvFromOther || rec->type == TransactionRecord::SendToOther ||
          rec->type == TransactionRecord::SendToAddress || rec->type == TransactionRecord::RecvWithAddress || rec->type == TransactionRecord::MNReward || rec->type == TransactionRecord::FNReward) {
          tooltip += QString(" ") + formatTxToAddress(rec, true);
      }
      return tooltip;
  }
  
  QVariant TransactionTableModel::data(const QModelIndex& index, int role) const
  {
      if (!index.isValid())
          return QVariant();
      TransactionRecord* rec = static_cast<TransactionRecord*>(index.internalPointer());
  
      switch (role) {
      case Qt::DecorationRole:
          switch (index.column()) {
          case Status:
              return txStatusDecoration(rec);
          case Watchonly:
              return txWatchonlyDecoration(rec);
          case ToAddress:
              return txAddressDecoration(rec);
          }
          break;
      case Qt::DisplayRole:
          switch (index.column()) {
          case Date:
              return formatTxDate(rec);
          case Type:
              return formatTxType(rec);
          case ToAddress:
              return formatTxToAddress(rec, false);
          case Amount:
              return formatTxAmount(rec, true, BitcoinUnits::separatorAlways);
          }
          break;
      case Qt::EditRole:
          // Edit role is used for sorting, so return the unformatted values
          switch (index.column()) {
          case Status:
              return QString::fromStdString(rec->status.sortKey);
          case Date:
              return rec->time;
          case Type:
              return formatTxType(rec);
          case Watchonly:
              return (rec->involvesWatchAddress ? 1 : 0);
          case ToAddress:
              return formatTxToAddress(rec, true);
          case Amount:
              return qint64(rec->credit + rec->debit);
          }
          break;
      case Qt::ToolTipRole:
          return formatTooltip(rec);
      case Qt::TextAlignmentRole:
          return column_alignments[index.column()];
      case Qt::ForegroundRole:
          // Conflicted, most probably orphaned
          if (rec->status.status == TransactionStatus::Conflicted || rec->status.status == TransactionStatus::NotAccepted) {
              return COLOR_CONFLICTED;
          }
          // Unconfimed or immature
          if ((rec->status.status == TransactionStatus::Unconfirmed) || (rec->status.status == TransactionStatus::Immature)) {
              return COLOR_UNCONFIRMED;
          }
          if (index.column() == Amount && (rec->credit + rec->debit) < 0) {
              return COLOR_NEGATIVE;
          }
          if (index.column() == ToAddress) {
              return addressColor(rec);
          }
  
          // To avoid overriding above conditional formats a default text color for this QTableView is not defined in stylesheet,
          // so we must always return a color here
          return COLOR_BLACK;
      case TypeRole:
          return rec->type;
      case DateRole:
          return QDateTime::fromTime_t(static_cast<uint>(rec->time));
      case WatchonlyRole:
          return rec->involvesWatchAddress;
      case WatchonlyDecorationRole:
          return txWatchonlyDecoration(rec);
      case LongDescriptionRole:
          return priv->describe(rec, walletModel->getOptionsModel()->getDisplayUnit());
      case AddressRole:
          return QString::fromStdString(rec->address);
      case LabelRole:
          return walletModel->getAddressTableModel()->labelForAddress(QString::fromStdString(rec->address));
      case AmountRole:
          return qint64(rec->credit + rec->debit);
      case TxIDRole:
          return rec->getTxID();
      case TxHashRole:
          return QString::fromStdString(rec->hash.ToString());
      case ConfirmedRole:
          return rec->status.countsForBalance;
      case FormattedAmountRole:
          // Used for copy/export, so don't include separators
          return formatTxAmount(rec, false, BitcoinUnits::separatorNever);
      case StatusRole:
          return rec->status.status;
      }
      return QVariant();
  }
  
  QVariant TransactionTableModel::headerData(int section, Qt::Orientation orientation, int role) const
  {
      if (orientation == Qt::Horizontal) {
          if (role == Qt::DisplayRole) {
              return columns[section];
          } else if (role == Qt::TextAlignmentRole) {
              return column_alignments[section];
          } else if (role == Qt::ToolTipRole) {
              switch (section) {
              case Status:
                  return tr("Transaction status. Hover over this field to show number of confirmations.");
              case Date:
                  return tr("Date and time that the transaction was received.");
              case Type:
                  return tr("Type of transaction.");
              case Watchonly:
                  return tr("Whether or not a watch-only address is involved in this transaction.");
              case ToAddress:
                  return tr("Destination address of transaction.");
              case Amount:
                  return tr("Amount removed from or added to balance.");
              }
          }
      }
      return QVariant();
  }
  
  QModelIndex TransactionTableModel::index(int row, int column, const QModelIndex& parent) const
  {
      Q_UNUSED(parent);
      TransactionRecord* data = priv->index(row);
      if (data) {
          return createIndex(row, column, priv->index(row));
      }
      return QModelIndex();
  }
  
  void TransactionTableModel::updateDisplayUnit()
  {
      // emit dataChanged to update Amount column with the current unit
      updateAmountColumnTitle();
      emit dataChanged(index(0, Amount), index(priv->size() - 1, Amount));
  }
  
  // queue notifications to show a non freezing progress dialog e.g. for rescan
  struct TransactionNotification {
  public:
      TransactionNotification() {}
      TransactionNotification(uint256 hash, ChangeType status, bool showTransaction) : hash(hash), status(status), showTransaction(showTransaction) {}
  
      void invoke(QObject* ttm)
      {
          QString strHash = QString::fromStdString(hash.GetHex());
          qDebug() << "NotifyTransactionChanged : " + strHash + " status= " + QString::number(status);
          QMetaObject::invokeMethod(ttm, "updateTransaction", Qt::QueuedConnection,
              Q_ARG(QString, strHash),
              Q_ARG(int, status),
              Q_ARG(bool, showTransaction));
      }
  
  private:
      uint256 hash;
      ChangeType status;
      bool showTransaction;
  };
  
  static bool fQueueNotifications = false;
  static std::vector<TransactionNotification> vQueueNotifications;
  
  static void NotifyTransactionChanged(TransactionTableModel* ttm, CWallet* wallet, const uint256& hash, ChangeType status)
  {
      // Find transaction in wallet
      std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(hash);
      // Determine whether to show transaction or not (determine this here so that no relocking is needed in GUI thread)
      bool inWallet = mi != wallet->mapWallet.end();
      bool showTransaction = (inWallet && TransactionRecord::showTransaction(mi->second));
  
      TransactionNotification notification(hash, status, showTransaction);
  
      if (fQueueNotifications) {
          vQueueNotifications.push_back(notification);
          return;
      }
      notification.invoke(ttm);
  }
  
  static void ShowProgress(TransactionTableModel* ttm, const std::string& title, int nProgress)
  {
      if (nProgress == 0)
          fQueueNotifications = true;
  
      if (nProgress == 100) {
          fQueueNotifications = false;
          if (vQueueNotifications.size() > 10) // prevent balloon spam, show maximum 10 balloons
              QMetaObject::invokeMethod(ttm, "setProcessingQueuedTransactions", Qt::QueuedConnection, Q_ARG(bool, true));
          for (unsigned int i = 0; i < vQueueNotifications.size(); ++i) {
              if (vQueueNotifications.size() - i <= 10)
                  QMetaObject::invokeMethod(ttm, "setProcessingQueuedTransactions", Qt::QueuedConnection, Q_ARG(bool, false));
  
              vQueueNotifications[i].invoke(ttm);
          }
          std::vector<TransactionNotification>().swap(vQueueNotifications); // clear
      }
  }
  
  void TransactionTableModel::subscribeToCoreSignals()
  {
      // Connect signals to wallet
      wallet->NotifyTransactionChanged.connect(boost::bind(NotifyTransactionChanged, this, boost::arg<1>(), boost::arg<2>(), boost::arg<3>()));
      wallet->ShowProgress.connect(boost::bind(ShowProgress, this, boost::arg<1>(), boost::arg<2>()));
  }
  
  void TransactionTableModel::unsubscribeFromCoreSignals()
  {
      // Disconnect signals from wallet
      wallet->NotifyTransactionChanged.disconnect(boost::bind(NotifyTransactionChanged, this, boost::arg<1>(), boost::arg<2>(), boost::arg<3>()));
      wallet->ShowProgress.disconnect(boost::bind(ShowProgress, this, boost::arg<1>(), boost::arg<2>()));
  }
  