git / moonbite-core / src/qt/transactionview.cpp · raw

// Copyright (c) 2011-2019 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 <qt/addresstablemodel.h>#include <qt/bitcoinunits.h>#include <qt/csvmodelwriter.h>#include <qt/editaddressdialog.h>#include <qt/guiutil.h>#include <qt/optionsmodel.h>#include <qt/platformstyle.h>#include <qt/transactiondescdialog.h>#include <qt/transactionfilterproxy.h>#include <qt/transactiontablemodel.h>#include <qt/walletmodel.h>#include <node/ui_interface.h>#include <QApplication>#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){    // 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(WalletTxRecord::RecvWithAddress) |                                        TransactionFilterProxy::TYPE(WalletTxRecord::RecvFromOther));    typeWidget->addItem(tr("Sent to"), TransactionFilterProxy::TYPE(WalletTxRecord::SendToAddress) |                                  TransactionFilterProxy::TYPE(WalletTxRecord::SendToOther));    typeWidget->addItem(tr("To yourself"), TransactionFilterProxy::TYPE(WalletTxRecord::SendToSelf));    typeWidget->addItem(tr("Mined"), TransactionFilterProxy::TYPE(WalletTxRecord::Generated));    typeWidget->addItem(tr("Other"), TransactionFilterProxy::TYPE(WalletTxRecord::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;    transactionView->setObjectName("transactionView");    // Actions    abandonAction = new QAction(tr("Abandon transaction"), this);    bumpFeeAction = new QAction(tr("Increase transaction fee"), this);    bumpFeeAction->setObjectName("bumpFeeAction");    rebroadcastAction = new QAction(tr("Rebroadcast transaction"), this);    copyAddressAction = new QAction(tr("Copy address"), this);    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->setObjectName("contextMenu");    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(bumpFeeAction);    contextMenu->addAction(abandonAction);    contextMenu->addAction(rebroadcastAction);    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(bumpFeeAction, &QAction::triggered, this, &TransactionView::bumpFee);    connect(abandonAction, &QAction::triggered, this, &TransactionView::abandonTx);    connect(rebroadcastAction, &QAction::triggered, this, &TransactionView::rebroadcastTx);    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);    // Highlight transaction after fee bump    connect(this, &TransactionView::bumpedFee, [this](const uint256& txid) {      focusTransaction(txid);    });}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 = _model->getOptionsModel()->getThirdPartyTxUrls().split("|", QString::SkipEmptyParts);            for (int i = 0; i < listUrls.size(); ++i)            {                QString url = listUrls[i].trimmed();                QString host = QUrl(url, QUrl::StrictMode).host();                if (!host.isEmpty())                {                    QAction *thirdPartyTxUrlAction = new QAction(host, this); // use host as menu item label                    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;    QDate current = QDate::currentDate();    dateRangeWidget->setVisible(false);    switch(dateWidget->itemData(idx).toInt())    {    case All:        transactionProxyModel->setDateRange(                TransactionFilterProxy::MIN_DATE,                TransactionFilterProxy::MAX_DATE);        break;    case Today:        transactionProxyModel->setDateRange(                QDateTime(current),                TransactionFilterProxy::MAX_DATE);        break;    case ThisWeek: {        // Find last Monday        QDate startOfWeek = current.addDays(-(current.dayOfWeek()-1));        transactionProxyModel->setDateRange(                QDateTime(startOfWeek),                TransactionFilterProxy::MAX_DATE);        } break;    case ThisMonth:        transactionProxyModel->setDateRange(                QDateTime(QDate(current.year(), current.month(), 1)),                TransactionFilterProxy::MAX_DATE);        break;    case LastMonth:        transactionProxyModel->setDateRange(                QDateTime(QDate(current.year(), current.month(), 1).addMonths(-1)),                QDateTime(QDate(current.year(), current.month(), 1)));        break;    case ThisYear:        transactionProxyModel->setDateRange(                QDateTime(QDate(current.year(), 1, 1)),                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;    CAmount amount_parsed = 0;    if (BitcoinUnits::parse(model->getOptionsModel()->getDisplayUnit(), amountWidget->text(), &amount_parsed)) {        transactionProxyModel->setMinAmount(amount_parsed);    }    else    {        transactionProxyModel->setMinAmount(0);    }}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::TxHashRole);    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    uint256 hash;    hash.SetHex(selection.at(0).data(TransactionTableModel::TxHashRole).toString().toStdString());    abandonAction->setEnabled(model->wallet().transactionCanBeAbandoned(hash));    bumpFeeAction->setEnabled(model->wallet().transactionCanBeBumped(hash));    rebroadcastAction->setEnabled(model->wallet().transactionCanBeRebroadcast(hash));    copyAddressAction->setEnabled(GUIUtil::hasEntryData(transactionView, 0, TransactionTableModel::AddressRole));    copyLabelAction->setEnabled(GUIUtil::hasEntryData(transactionView, 0, TransactionTableModel::LabelRole));    if (index.isValid()) {        GUIUtil::PopupMenu(contextMenu, 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)    uint256 hash;    QString hashQStr = selection.at(0).data(TransactionTableModel::TxHashRole).toString();    hash.SetHex(hashQStr.toStdString());    // Abandon the wallet transaction over the walletModel    model->wallet().abandonTransaction(hash);    // Update the table    model->getTransactionTableModel()->updateTransaction(hashQStr, CT_UPDATED, false);}void TransactionView::bumpFee(){    if(!transactionView || !transactionView->selectionModel())        return;    QModelIndexList selection = transactionView->selectionModel()->selectedRows(0);    // get the hash from the TxHashRole (QVariant / QString)    uint256 hash;    QString hashQStr = selection.at(0).data(TransactionTableModel::TxHashRole).toString();    hash.SetHex(hashQStr.toStdString());    // Bump tx fee over the walletModel    uint256 newHash;    if (model->bumpFee(hash, newHash)) {        // Update the table        transactionView->selectionModel()->clearSelection();        model->getTransactionTableModel()->updateTransaction(hashQStr, CT_UPDATED, true);        qApp->processEvents();        Q_EMIT bumpedFee(newHash);    }}void TransactionView::rebroadcastTx(){    if (!transactionView || !transactionView->selectionModel())        return;    QModelIndexList selection = transactionView->selectionModel()->selectedRows(0);    // get the hash from the TxHashRole (QVariant / QString)    uint256 hash;    QString hashQStr = selection.at(0).data(TransactionTableModel::TxHashRole).toString();    hash.SetHex(hashQStr.toStdString());    // Rebroadcast the wallet transaction over the walletModel    model->wallet().rebroadcastTransaction(hash);}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::TxHashRole);}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;    transactionProxyModel->setDateRange(            QDateTime(dateFrom->date()),            QDateTime(dateTo->date()).addDays(1));}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 textbool 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-onlyvoid TransactionView::updateWatchOnlyColumn(bool fHaveWatchOnly){    watchOnlyWidget->setVisible(fHaveWatchOnly);    transactionView->setColumnHidden(TransactionTableModel::Watchonly, !fHaveWatchOnly);}