transactionview.cpp

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// Copyright (c) 2011-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <qt/transactionview.h>

#include <node/ui_interface.h>
#include <qt/addresstablemodel.h>
#include <qt/bitcoinunits.h>
#include <qt/csvmodelwriter.h>
#include <qt/editaddressdialog.h>
#include <qt/optionsmodel.h>
#include <qt/platformstyle.h>
#include <qt/transactiondescdialog.h>
#include <qt/transactionfilterproxy.h>
#include <qt/transactionrecord.h>
#include <qt/transactiontablemodel.h>
#include <qt/walletmodel.h>

#include <QComboBox>
#include <QDateTimeEdit>
#include <QDesktopServices>
#include <QDoubleValidator>
#include <QHBoxLayout>
#include <QHeaderView>
#include <QLabel>
#include <QLineEdit>
#include <QMenu>
#include <QPoint>
#include <QScrollBar>
#include <QTableView>
#include <QTimer>
#include <QUrl>
#include <QVBoxLayout>

TransactionView::TransactionView(const PlatformStyle *platformStyle,
                                 QWidget *parent)
    : QWidget(parent), model(nullptr), transactionProxyModel(nullptr),
      transactionView(nullptr), abandonAction(nullptr),
      columnResizingFixer(nullptr) {
    // Build filter row
    setContentsMargins(0, 0, 0, 0);

    QHBoxLayout *hlayout = new QHBoxLayout();
    hlayout->setContentsMargins(0, 0, 0, 0);

    if (platformStyle->getUseExtraSpacing()) {
        hlayout->setSpacing(5);
        hlayout->addSpacing(26);
    } else {
        hlayout->setSpacing(0);
        hlayout->addSpacing(23);
    }

    watchOnlyWidget = new QComboBox(this);
    watchOnlyWidget->setFixedWidth(24);
    watchOnlyWidget->addItem("", TransactionFilterProxy::WatchOnlyFilter_All);
    watchOnlyWidget->addItem(platformStyle->SingleColorIcon(":/icons/eye_plus"),
                             "", TransactionFilterProxy::WatchOnlyFilter_Yes);
    watchOnlyWidget->addItem(
        platformStyle->SingleColorIcon(":/icons/eye_minus"), "",
        TransactionFilterProxy::WatchOnlyFilter_No);
    hlayout->addWidget(watchOnlyWidget);

    dateWidget = new QComboBox(this);
    if (platformStyle->getUseExtraSpacing()) {
        dateWidget->setFixedWidth(121);
    } else {
        dateWidget->setFixedWidth(120);
    }
    dateWidget->addItem(tr("All"), All);
    dateWidget->addItem(tr("Today"), Today);
    dateWidget->addItem(tr("This week"), ThisWeek);
    dateWidget->addItem(tr("This month"), ThisMonth);
    dateWidget->addItem(tr("Last month"), LastMonth);
    dateWidget->addItem(tr("This year"), ThisYear);
    dateWidget->addItem(tr("Range..."), Range);
    hlayout->addWidget(dateWidget);

    typeWidget = new QComboBox(this);
    if (platformStyle->getUseExtraSpacing()) {
        typeWidget->setFixedWidth(121);
    } else {
        typeWidget->setFixedWidth(120);
    }

    typeWidget->addItem(tr("All"), TransactionFilterProxy::ALL_TYPES);
    typeWidget->addItem(
        tr("Received with"),
        TransactionFilterProxy::TYPE(TransactionRecord::RecvWithAddress) |
            TransactionFilterProxy::TYPE(TransactionRecord::RecvFromOther));
    typeWidget->addItem(
        tr("Sent to"),
        TransactionFilterProxy::TYPE(TransactionRecord::SendToAddress) |
            TransactionFilterProxy::TYPE(TransactionRecord::SendToOther));
    typeWidget->addItem(tr("To yourself"), TransactionFilterProxy::TYPE(
                                               TransactionRecord::SendToSelf));
    typeWidget->addItem(tr("Mined"), TransactionFilterProxy::TYPE(
                                         TransactionRecord::Generated));
    typeWidget->addItem(tr("Other"),
                        TransactionFilterProxy::TYPE(TransactionRecord::Other));

    hlayout->addWidget(typeWidget);

    search_widget = new QLineEdit(this);
    search_widget->setPlaceholderText(
        tr("Enter address, transaction id, or label to search"));
    hlayout->addWidget(search_widget);

    amountWidget = new QLineEdit(this);
    amountWidget->setPlaceholderText(tr("Min amount"));
    if (platformStyle->getUseExtraSpacing()) {
        amountWidget->setFixedWidth(97);
    } else {
        amountWidget->setFixedWidth(100);
    }
    QDoubleValidator *amountValidator = new QDoubleValidator(0, 1e20, 8, this);
    QLocale amountLocale(QLocale::C);
    amountLocale.setNumberOptions(QLocale::RejectGroupSeparator);
    amountValidator->setLocale(amountLocale);
    amountWidget->setValidator(amountValidator);
    hlayout->addWidget(amountWidget);

    // Delay before filtering transactions in ms
    static const int input_filter_delay = 200;

    QTimer *amount_typing_delay = new QTimer(this);
    amount_typing_delay->setSingleShot(true);
    amount_typing_delay->setInterval(input_filter_delay);

    QTimer *prefix_typing_delay = new QTimer(this);
    prefix_typing_delay->setSingleShot(true);
    prefix_typing_delay->setInterval(input_filter_delay);

    QVBoxLayout *vlayout = new QVBoxLayout(this);
    vlayout->setContentsMargins(0, 0, 0, 0);
    vlayout->setSpacing(0);

    QTableView *view = new QTableView(this);
    vlayout->addLayout(hlayout);
    vlayout->addWidget(createDateRangeWidget());
    vlayout->addWidget(view);
    vlayout->setSpacing(0);
    int width = view->verticalScrollBar()->sizeHint().width();
    // Cover scroll bar width with spacing
    if (platformStyle->getUseExtraSpacing()) {
        hlayout->addSpacing(width + 2);
    } else {
        hlayout->addSpacing(width);
    }
    // Always show scroll bar
    view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
    view->setTabKeyNavigation(false);
    view->setContextMenuPolicy(Qt::CustomContextMenu);

    view->installEventFilter(this);

    transactionView = view;

    // Actions
    abandonAction = new QAction(tr("Abandon transaction"), this);
    QAction *copyAddressAction = new QAction(tr("Copy address"), this);
    QAction *copyLabelAction = new QAction(tr("Copy label"), this);
    QAction *copyAmountAction = new QAction(tr("Copy amount"), this);
    QAction *copyTxIDAction = new QAction(tr("Copy transaction ID"), this);
    QAction *copyTxHexAction = new QAction(tr("Copy raw transaction"), this);
    QAction *copyTxPlainText =
        new QAction(tr("Copy full transaction details"), this);
    QAction *editLabelAction = new QAction(tr("Edit label"), this);
    QAction *showDetailsAction =
        new QAction(tr("Show transaction details"), this);

    contextMenu = new QMenu(this);
    contextMenu->addAction(copyAddressAction);
    contextMenu->addAction(copyLabelAction);
    contextMenu->addAction(copyAmountAction);
    contextMenu->addAction(copyTxIDAction);
    contextMenu->addAction(copyTxHexAction);
    contextMenu->addAction(copyTxPlainText);
    contextMenu->addAction(showDetailsAction);
    contextMenu->addSeparator();
    contextMenu->addAction(abandonAction);
    contextMenu->addAction(editLabelAction);

    connect(dateWidget,
            static_cast<void (QComboBox::*)(int)>(&QComboBox::activated), this,
            &TransactionView::chooseDate);
    connect(typeWidget,
            static_cast<void (QComboBox::*)(int)>(&QComboBox::activated), this,
            &TransactionView::chooseType);
    connect(watchOnlyWidget,
            static_cast<void (QComboBox::*)(int)>(&QComboBox::activated), this,
            &TransactionView::chooseWatchonly);
    connect(amountWidget, &QLineEdit::textChanged, amount_typing_delay,
            static_cast<void (QTimer::*)()>(&QTimer::start));
    connect(amount_typing_delay, &QTimer::timeout, this,
            &TransactionView::changedAmount);
    connect(search_widget, &QLineEdit::textChanged, prefix_typing_delay,
            static_cast<void (QTimer::*)()>(&QTimer::start));
    connect(prefix_typing_delay, &QTimer::timeout, this,
            &TransactionView::changedSearch);

    connect(view, &QTableView::doubleClicked, this,
            &TransactionView::doubleClicked);
    connect(view, &QTableView::customContextMenuRequested, this,
            &TransactionView::contextualMenu);

    connect(abandonAction, &QAction::triggered, this,
            &TransactionView::abandonTx);
    connect(copyAddressAction, &QAction::triggered, this,
            &TransactionView::copyAddress);
    connect(copyLabelAction, &QAction::triggered, this,
            &TransactionView::copyLabel);
    connect(copyAmountAction, &QAction::triggered, this,
            &TransactionView::copyAmount);
    connect(copyTxIDAction, &QAction::triggered, this,
            &TransactionView::copyTxID);
    connect(copyTxHexAction, &QAction::triggered, this,
            &TransactionView::copyTxHex);
    connect(copyTxPlainText, &QAction::triggered, this,
            &TransactionView::copyTxPlainText);
    connect(editLabelAction, &QAction::triggered, this,
            &TransactionView::editLabel);
    connect(showDetailsAction, &QAction::triggered, this,
            &TransactionView::showDetails);
    // Double-clicking on a transaction on the transaction history page shows
    // details
    connect(this, &TransactionView::doubleClicked, this,
            &TransactionView::showDetails);
}

void TransactionView::setModel(WalletModel *_model) {
    this->model = _model;
    if (_model) {
        transactionProxyModel = new TransactionFilterProxy(this);
        transactionProxyModel->setSourceModel(
            _model->getTransactionTableModel());
        transactionProxyModel->setDynamicSortFilter(true);
        transactionProxyModel->setSortCaseSensitivity(Qt::CaseInsensitive);
        transactionProxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);

        transactionProxyModel->setSortRole(Qt::EditRole);

        transactionView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
        transactionView->setModel(transactionProxyModel);
        transactionView->setAlternatingRowColors(true);
        transactionView->setSelectionBehavior(QAbstractItemView::SelectRows);
        transactionView->setSelectionMode(QAbstractItemView::ExtendedSelection);
        transactionView->horizontalHeader()->setSortIndicator(
            TransactionTableModel::Date, Qt::DescendingOrder);
        transactionView->setSortingEnabled(true);
        transactionView->verticalHeader()->hide();

        transactionView->setColumnWidth(TransactionTableModel::Status,
                                        STATUS_COLUMN_WIDTH);
        transactionView->setColumnWidth(TransactionTableModel::Watchonly,
                                        WATCHONLY_COLUMN_WIDTH);
        transactionView->setColumnWidth(TransactionTableModel::Date,
                                        DATE_COLUMN_WIDTH);
        transactionView->setColumnWidth(TransactionTableModel::Type,
                                        TYPE_COLUMN_WIDTH);
        transactionView->setColumnWidth(TransactionTableModel::Amount,
                                        AMOUNT_MINIMUM_COLUMN_WIDTH);

        columnResizingFixer = new GUIUtil::TableViewLastColumnResizingFixer(
            transactionView, AMOUNT_MINIMUM_COLUMN_WIDTH, MINIMUM_COLUMN_WIDTH,
            this);

        if (_model->getOptionsModel()) {
            // Add third party transaction URLs to context menu
            QStringList listUrls = GUIUtil::splitSkipEmptyParts(
                _model->getOptionsModel()->getThirdPartyTxUrls(), "|");
            for (int i = 0; i < listUrls.size(); ++i) {
                QString url = listUrls[i].trimmed();
                QString host = QUrl(url, QUrl::StrictMode).host();
                if (!host.isEmpty()) {
                    // use host as menu item label
                    QAction *thirdPartyTxUrlAction = new QAction(host, this);
                    if (i == 0) {
                        contextMenu->addSeparator();
                    }
                    contextMenu->addAction(thirdPartyTxUrlAction);
                    connect(thirdPartyTxUrlAction, &QAction::triggered,
                            [this, url] { openThirdPartyTxUrl(url); });
                }
            }
        }

        // show/hide column Watch-only
        updateWatchOnlyColumn(_model->wallet().haveWatchOnly());

        // Watch-only signal
        connect(_model, &WalletModel::notifyWatchonlyChanged, this,
                &TransactionView::updateWatchOnlyColumn);
    }
}

void TransactionView::chooseDate(int idx) {
    if (!transactionProxyModel) {
        return;
    }

    const QDate currentDate = QDate::currentDate();

#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
    const QDateTime startofDay = currentDate.startOfDay();
#else
    const QDateTime startofDay = QDateTime(currentDate);
#endif
    const QDateTime startOfWeek =
        startofDay.addDays(-(currentDate.dayOfWeek() - 1));
    const QDateTime startOfMonth = startofDay.addDays(-(currentDate.day() - 1));
    const QDateTime startOfYear =
        startofDay.addDays(-(currentDate.dayOfYear() - 1));

    dateRangeWidget->setVisible(false);
    switch (dateWidget->itemData(idx).toInt()) {
        case All:
            transactionProxyModel->setDateRange(
                TransactionFilterProxy::MIN_DATE,
                TransactionFilterProxy::MAX_DATE);
            break;
        case Today:
            transactionProxyModel->setDateRange(
                startofDay, TransactionFilterProxy::MAX_DATE);
            break;
        case ThisWeek: {
            // Find last Monday

            transactionProxyModel->setDateRange(
                startOfWeek, TransactionFilterProxy::MAX_DATE);

        } break;
        case ThisMonth:

            transactionProxyModel->setDateRange(
                startOfMonth, TransactionFilterProxy::MAX_DATE);
            break;
        case LastMonth:
            transactionProxyModel->setDateRange(startOfMonth.addMonths(-1),
                                                startOfMonth);
            break;
        case ThisYear:

            transactionProxyModel->setDateRange(
                startOfYear, TransactionFilterProxy::MAX_DATE);
            break;
        case Range:
            dateRangeWidget->setVisible(true);
            dateRangeChanged();
            break;
    }
}

void TransactionView::chooseType(int idx) {
    if (!transactionProxyModel) {
        return;
    }

    transactionProxyModel->setTypeFilter(typeWidget->itemData(idx).toInt());
}

void TransactionView::chooseWatchonly(int idx) {
    if (!transactionProxyModel) {
        return;
    }

    transactionProxyModel->setWatchOnlyFilter(
        static_cast<TransactionFilterProxy::WatchOnlyFilter>(
            watchOnlyWidget->itemData(idx).toInt()));
}

void TransactionView::changedSearch() {
    if (!transactionProxyModel) {
        return;
    }

    transactionProxyModel->setSearchString(search_widget->text());
}

void TransactionView::changedAmount() {
    if (!transactionProxyModel) {
        return;
    }

    Amount amount_parsed = Amount::zero();
    if (BitcoinUnits::parse(model->getOptionsModel()->getDisplayUnit(),
                            amountWidget->text(), &amount_parsed)) {
        transactionProxyModel->setMinAmount(amount_parsed);
    } else {
        transactionProxyModel->setMinAmount(Amount::zero());
    }
}

void TransactionView::exportClicked() {
    if (!model || !model->getOptionsModel()) {
        return;
    }

    // CSV is currently the only supported format
    QString filename = GUIUtil::getSaveFileName(
        this, tr("Export Transaction History"), QString(),
        tr("Comma separated file (*.csv)"), nullptr);

    if (filename.isNull()) {
        return;
    }

    CSVModelWriter writer(filename);

    // name, column, role
    writer.setModel(transactionProxyModel);
    writer.addColumn(tr("Confirmed"), 0, TransactionTableModel::ConfirmedRole);
    if (model->wallet().haveWatchOnly()) {
        writer.addColumn(tr("Watch-only"), TransactionTableModel::Watchonly);
    }
    writer.addColumn(tr("Date"), 0, TransactionTableModel::DateRole);
    writer.addColumn(tr("Type"), TransactionTableModel::Type, Qt::EditRole);
    writer.addColumn(tr("Label"), 0, TransactionTableModel::LabelRole);
    writer.addColumn(tr("Address"), 0, TransactionTableModel::AddressRole);
    writer.addColumn(BitcoinUnits::getAmountColumnTitle(
                         model->getOptionsModel()->getDisplayUnit()),
                     0, TransactionTableModel::FormattedAmountRole);
    writer.addColumn(tr("ID"), 0, TransactionTableModel::TxIDRole);

    if (!writer.write()) {
        Q_EMIT message(tr("Exporting Failed"),
                       tr("There was an error trying to save the transaction "
                          "history to %1.")
                           .arg(filename),
                       CClientUIInterface::MSG_ERROR);
    } else {
        Q_EMIT message(
            tr("Exporting Successful"),
            tr("The transaction history was successfully saved to %1.")
                .arg(filename),
            CClientUIInterface::MSG_INFORMATION);
    }
}

void TransactionView::contextualMenu(const QPoint &point) {
    QModelIndex index = transactionView->indexAt(point);
    QModelIndexList selection =
        transactionView->selectionModel()->selectedRows(0);
    if (selection.empty()) {
        return;
    }

    // check if transaction can be abandoned, disable context menu action in
    // case it doesn't
    TxId txid;
    txid.SetHex(selection.at(0)
                    .data(TransactionTableModel::TxHashRole)
                    .toString()
                    .toStdString());
    abandonAction->setEnabled(model->wallet().transactionCanBeAbandoned(txid));

    if (index.isValid()) {
        contextMenu->popup(transactionView->viewport()->mapToGlobal(point));
    }
}

void TransactionView::abandonTx() {
    if (!transactionView || !transactionView->selectionModel()) {
        return;
    }

    QModelIndexList selection =
        transactionView->selectionModel()->selectedRows(0);

    // get the hash from the TxHashRole (QVariant / QString)
    QString hashQStr =
        selection.at(0).data(TransactionTableModel::TxHashRole).toString();

    TxId txid;
    txid.SetHex(hashQStr.toStdString());

    // Abandon the wallet transaction over the walletModel
    model->wallet().abandonTransaction(txid);

    // Update the table
    model->getTransactionTableModel()->updateTransaction(hashQStr, CT_UPDATED,
                                                         false);
}

void TransactionView::copyAddress() {
    GUIUtil::copyEntryData(transactionView, 0,
                           TransactionTableModel::AddressRole);
}

void TransactionView::copyLabel() {
    GUIUtil::copyEntryData(transactionView, 0,
                           TransactionTableModel::LabelRole);
}

void TransactionView::copyAmount() {
    GUIUtil::copyEntryData(transactionView, 0,
                           TransactionTableModel::FormattedAmountRole);
}

void TransactionView::copyTxID() {
    GUIUtil::copyEntryData(transactionView, 0, TransactionTableModel::TxIDRole);
}

void TransactionView::copyTxHex() {
    GUIUtil::copyEntryData(transactionView, 0,
                           TransactionTableModel::TxHexRole);
}

void TransactionView::copyTxPlainText() {
    GUIUtil::copyEntryData(transactionView, 0,
                           TransactionTableModel::TxPlainTextRole);
}

void TransactionView::editLabel() {
    if (!transactionView->selectionModel() || !model) {
        return;
    }

    QModelIndexList selection =
        transactionView->selectionModel()->selectedRows();
    if (!selection.isEmpty()) {
        AddressTableModel *addressBook = model->getAddressTableModel();
        if (!addressBook) {
            return;
        }

        QString address =
            selection.at(0).data(TransactionTableModel::AddressRole).toString();
        if (address.isEmpty()) {
            // If this transaction has no associated address, exit
            return;
        }
        // Is address in address book? Address book can miss address when a
        // transaction is sent from outside the UI.
        int idx = addressBook->lookupAddress(address);
        if (idx != -1) {
            // Edit sending / receiving address
            QModelIndex modelIdx = addressBook->index(idx, 0, QModelIndex());
            // Determine type of address, launch appropriate editor dialog type
            QString type =
                modelIdx.data(AddressTableModel::TypeRole).toString();

            EditAddressDialog dlg(type == AddressTableModel::Receive
                                      ? EditAddressDialog::EditReceivingAddress
                                      : EditAddressDialog::EditSendingAddress,
                                  this);
            dlg.setModel(addressBook);
            dlg.loadRow(idx);
            dlg.exec();
        } else {
            // Add sending address
            EditAddressDialog dlg(EditAddressDialog::NewSendingAddress, this);
            dlg.setModel(addressBook);
            dlg.setAddress(address);
            dlg.exec();
        }
    }
}

void TransactionView::showDetails() {
    if (!transactionView->selectionModel()) {
        return;
    }

    QModelIndexList selection =
        transactionView->selectionModel()->selectedRows();
    if (!selection.isEmpty()) {
        TransactionDescDialog *dlg = new TransactionDescDialog(selection.at(0));
        dlg->setAttribute(Qt::WA_DeleteOnClose);
        dlg->show();
    }
}

void TransactionView::openThirdPartyTxUrl(QString url) {
    if (!transactionView || !transactionView->selectionModel()) {
        return;
    }

    QModelIndexList selection =
        transactionView->selectionModel()->selectedRows(0);
    if (!selection.isEmpty()) {
        QDesktopServices::openUrl(QUrl::fromUserInput(
            url.replace("%s", selection.at(0)
                                  .data(TransactionTableModel::TxHashRole)
                                  .toString())));
    }
}

QWidget *TransactionView::createDateRangeWidget() {
    dateRangeWidget = new QFrame();
    dateRangeWidget->setFrameStyle(QFrame::Panel | QFrame::Raised);
    dateRangeWidget->setContentsMargins(1, 1, 1, 1);
    QHBoxLayout *layout = new QHBoxLayout(dateRangeWidget);
    layout->setContentsMargins(0, 0, 0, 0);
    layout->addSpacing(23);
    layout->addWidget(new QLabel(tr("Range:")));

    dateFrom = new QDateTimeEdit(this);
    dateFrom->setDisplayFormat("dd/MM/yy");
    dateFrom->setCalendarPopup(true);
    dateFrom->setMinimumWidth(100);
    dateFrom->setDate(QDate::currentDate().addDays(-7));
    layout->addWidget(dateFrom);
    layout->addWidget(new QLabel(tr("to")));

    dateTo = new QDateTimeEdit(this);
    dateTo->setDisplayFormat("dd/MM/yy");
    dateTo->setCalendarPopup(true);
    dateTo->setMinimumWidth(100);
    dateTo->setDate(QDate::currentDate());
    layout->addWidget(dateTo);
    layout->addStretch();

    // Hide by default
    dateRangeWidget->setVisible(false);

    // Notify on change
    connect(dateFrom, &QDateTimeEdit::dateChanged, this,
            &TransactionView::dateRangeChanged);
    connect(dateTo, &QDateTimeEdit::dateChanged, this,
            &TransactionView::dateRangeChanged);

    return dateRangeWidget;
}

void TransactionView::dateRangeChanged() {
    if (!transactionProxyModel) {
        return;
    }

#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
    const QDateTime rangeFrom = dateFrom->date().startOfDay();
    const QDateTime rangeTo = dateTo->date().endOfDay();
#else
    const QDateTime rangeFrom = QDateTime(dateFrom->date());
    const QDateTime rangeTo = QDateTime(dateTo->date()).addDays(1);
#endif

    transactionProxyModel->setDateRange(rangeFrom, rangeTo);
}

void TransactionView::focusTransaction(const QModelIndex &idx) {
    if (!transactionProxyModel) {
        return;
    }

    QModelIndex targetIdx = transactionProxyModel->mapFromSource(idx);
    transactionView->scrollTo(targetIdx);
    transactionView->setCurrentIndex(targetIdx);
    transactionView->setFocus();
}

void TransactionView::focusTransaction(const uint256 &txid) {
    if (!transactionProxyModel) {
        return;
    }

    const QModelIndexList results =
        this->model->getTransactionTableModel()->match(
            this->model->getTransactionTableModel()->index(0, 0),
            TransactionTableModel::TxHashRole,
            QString::fromStdString(txid.ToString()), -1);

    transactionView->setFocus();
    transactionView->selectionModel()->clearSelection();
    for (const QModelIndex &index : results) {
        const QModelIndex targetIndex =
            transactionProxyModel->mapFromSource(index);
        transactionView->selectionModel()->select(
            targetIndex,
            QItemSelectionModel::Rows | QItemSelectionModel::Select);
        // Called once per destination to ensure all results are in view, unless
        // transactions are not ordered by (ascending or descending) date.
        transactionView->scrollTo(targetIndex);
        // scrollTo() does not scroll far enough the first time when
        // transactions are ordered by ascending date.
        if (index == results[0]) {
            transactionView->scrollTo(targetIndex);
        }
    }
}

// We override the virtual resizeEvent of the QWidget to adjust tables column
// sizes as the tables width is proportional to the dialogs width.
void TransactionView::resizeEvent(QResizeEvent *event) {
    QWidget::resizeEvent(event);
    columnResizingFixer->stretchColumnWidth(TransactionTableModel::ToAddress);
}

// Need to override default Ctrl+C action for amount as default behaviour is
// just to copy DisplayRole text
bool TransactionView::eventFilter(QObject *obj, QEvent *event) {
    if (event->type() == QEvent::KeyPress) {
        QKeyEvent *ke = static_cast<QKeyEvent *>(event);
        if (ke->key() == Qt::Key_C &&
            ke->modifiers().testFlag(Qt::ControlModifier)) {
            GUIUtil::copyEntryData(transactionView, 0,
                                   TransactionTableModel::TxPlainTextRole);
            return true;
        }
    }
    return QWidget::eventFilter(obj, event);
}

// show/hide column Watch-only
void TransactionView::updateWatchOnlyColumn(bool fHaveWatchOnly) {
    watchOnlyWidget->setVisible(fHaveWatchOnly);
    transactionView->setColumnHidden(TransactionTableModel::Watchonly,
                                     !fHaveWatchOnly);
}