text: // Copyright (c) 2011-2018 The bitmonkey Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include <qt/overviewpage.h>
  #include <qt/forms/ui_overviewpage.h>
  
  #include <qt/bitmonkeyunits.h>
  #include <qt/clientmodel.h>
  #include <qt/guiconstants.h>
  #include <qt/guiutil.h>
  #include <qt/optionsmodel.h>
  #include <qt/platformstyle.h>
  #include <qt/transactionfilterproxy.h>
  #include <qt/transactiontablemodel.h>
  #include <qt/walletmodel.h>
  
  #include <QAbstractItemDelegate>
  #include <QPainter>
  
  #define DECORATION_SIZE 54
  #define NUM_ITEMS 5
  
  Q_DECLARE_METATYPE(interfaces::WalletBalances)
  
  class TxViewDelegate : public QAbstractItemDelegate
  {
      Q_OBJECT
  public:
      explicit TxViewDelegate(const PlatformStyle *_platformStyle, QObject *parent=nullptr):
          QAbstractItemDelegate(parent), unit(bitmonkeyUnits::BTM),
          platformStyle(_platformStyle)
      {
  
      }
  
      inline void paint(QPainter *painter, const QStyleOptionViewItem &option,
                        const QModelIndex &index ) const
      {
          painter->save();
  
          QIcon icon = qvariant_cast<QIcon>(index.data(TransactionTableModel::RawDecorationRole));
          QRect mainRect = option.rect;
          QRect decorationRect(mainRect.topLeft(), QSize(DECORATION_SIZE, DECORATION_SIZE));
          int xspace = DECORATION_SIZE + 8;
          int ypad = 6;
          int halfheight = (mainRect.height() - 2*ypad)/2;
          QRect amountRect(mainRect.left() + xspace, mainRect.top()+ypad, mainRect.width() - xspace, halfheight);
          QRect addressRect(mainRect.left() + xspace, mainRect.top()+ypad+halfheight, mainRect.width() - xspace, halfheight);
          icon = platformStyle->SingleColorIcon(icon);
          icon.paint(painter, decorationRect);
  
          QDateTime date = index.data(TransactionTableModel::DateRole).toDateTime();
          QString address = index.data(Qt::DisplayRole).toString();
          qint64 amount = index.data(TransactionTableModel::AmountRole).toLongLong();
          bool confirmed = index.data(TransactionTableModel::ConfirmedRole).toBool();
          QVariant value = index.data(Qt::ForegroundRole);
          QColor foreground = option.palette.color(QPalette::Text);
          if(value.canConvert<QBrush>())
          {
              QBrush brush = qvariant_cast<QBrush>(value);
              foreground = brush.color();
          }
  
          painter->setPen(foreground);
          QRect boundingRect;
          painter->drawText(addressRect, Qt::AlignLeft|Qt::AlignVCenter, address, &boundingRect);
  
          if (index.data(TransactionTableModel::WatchonlyRole).toBool())
          {
              QIcon iconWatchonly = qvariant_cast<QIcon>(index.data(TransactionTableModel::WatchonlyDecorationRole));
              QRect watchonlyRect(boundingRect.right() + 5, mainRect.top()+ypad+halfheight, 16, halfheight);
              iconWatchonly.paint(painter, watchonlyRect);
          }
  
          if(amount < 0)
          {
              foreground = COLOR_NEGATIVE;
          }
          else if(!confirmed)
          {
              foreground = COLOR_UNCONFIRMED;
          }
          else
          {
              foreground = option.palette.color(QPalette::Text);
          }
          painter->setPen(foreground);
          QString amountText = bitmonkeyUnits::formatWithUnit(unit, amount, true, bitmonkeyUnits::separatorAlways);
          if(!confirmed)
          {
              amountText = QString("[") + amountText + QString("]");
          }
          painter->drawText(amountRect, Qt::AlignRight|Qt::AlignVCenter, amountText);
  
          painter->setPen(option.palette.color(QPalette::Text));
          painter->drawText(amountRect, Qt::AlignLeft|Qt::AlignVCenter, GUIUtil::dateTimeStr(date));
  
          painter->restore();
      }
  
      inline QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
      {
          return QSize(DECORATION_SIZE, DECORATION_SIZE);
      }
  
      int unit;
      const PlatformStyle *platformStyle;
  
  };
  #include <qt/overviewpage.moc>
  
  OverviewPage::OverviewPage(const PlatformStyle *platformStyle, QWidget *parent) :
      QWidget(parent),
      ui(new Ui::OverviewPage),
      clientModel(nullptr),
      walletModel(nullptr),
      txdelegate(new TxViewDelegate(platformStyle, this))
  {
      ui->setupUi(this);
  
      m_balances.balance = -1;
  
      // use a SingleColorIcon for the "out of sync warning" icon
      QIcon icon = platformStyle->SingleColorIcon(":/icons/warning");
      icon.addPixmap(icon.pixmap(QSize(64,64), QIcon::Normal), QIcon::Disabled); // also set the disabled icon because we are using a disabled QPushButton to work around missing HiDPI support of QLabel (https://bugreports.qt.io/browse/QTBUG-42503)
      ui->labelTransactionsStatus->setIcon(icon);
      ui->labelWalletStatus->setIcon(icon);
  
      // Recent transactions
      ui->listTransactions->setItemDelegate(txdelegate);
      ui->listTransactions->setIconSize(QSize(DECORATION_SIZE, DECORATION_SIZE));
      ui->listTransactions->setMinimumHeight(NUM_ITEMS * (DECORATION_SIZE + 2));
      ui->listTransactions->setAttribute(Qt::WA_MacShowFocusRect, false);
  
      connect(ui->listTransactions, &QListView::clicked, this, &OverviewPage::handleTransactionClicked);
  
      // start with displaying the "out of sync" warnings
      showOutOfSyncWarning(true);
      connect(ui->labelWalletStatus, &QPushButton::clicked, this, &OverviewPage::handleOutOfSyncWarningClicks);
      connect(ui->labelTransactionsStatus, &QPushButton::clicked, this, &OverviewPage::handleOutOfSyncWarningClicks);
  }
  
  void OverviewPage::handleTransactionClicked(const QModelIndex &index)
  {
      if(filter)
          Q_EMIT transactionClicked(filter->mapToSource(index));
  }
  
  void OverviewPage::handleOutOfSyncWarningClicks()
  {
      Q_EMIT outOfSyncWarningClicked();
  }
  
  OverviewPage::~OverviewPage()
  {
      delete ui;
  }
  
  void OverviewPage::setBalance(const interfaces::WalletBalances& balances)
  {
      int unit = walletModel->getOptionsModel()->getDisplayUnit();
      m_balances = balances;
      if (walletModel->privateKeysDisabled()) {
          ui->labelBalance->setText(bitmonkeyUnits::formatWithUnit(unit, balances.watch_only_balance, false, bitmonkeyUnits::separatorAlways));
          ui->labelUnconfirmed->setText(bitmonkeyUnits::formatWithUnit(unit, balances.unconfirmed_watch_only_balance, false, bitmonkeyUnits::separatorAlways));
          ui->labelImmature->setText(bitmonkeyUnits::formatWithUnit(unit, balances.immature_watch_only_balance, false, bitmonkeyUnits::separatorAlways));
          ui->labelTotal->setText(bitmonkeyUnits::formatWithUnit(unit, balances.watch_only_balance + balances.unconfirmed_watch_only_balance + balances.immature_watch_only_balance, false, bitmonkeyUnits::separatorAlways));
      } else {
          ui->labelBalance->setText(bitmonkeyUnits::formatWithUnit(unit, balances.balance, false, bitmonkeyUnits::separatorAlways));
          ui->labelUnconfirmed->setText(bitmonkeyUnits::formatWithUnit(unit, balances.unconfirmed_balance, false, bitmonkeyUnits::separatorAlways));
          ui->labelImmature->setText(bitmonkeyUnits::formatWithUnit(unit, balances.immature_balance, false, bitmonkeyUnits::separatorAlways));
          ui->labelTotal->setText(bitmonkeyUnits::formatWithUnit(unit, balances.balance + balances.unconfirmed_balance + balances.immature_balance, false, bitmonkeyUnits::separatorAlways));
          ui->labelWatchAvailable->setText(bitmonkeyUnits::formatWithUnit(unit, balances.watch_only_balance, false, bitmonkeyUnits::separatorAlways));
          ui->labelWatchPending->setText(bitmonkeyUnits::formatWithUnit(unit, balances.unconfirmed_watch_only_balance, false, bitmonkeyUnits::separatorAlways));
          ui->labelWatchImmature->setText(bitmonkeyUnits::formatWithUnit(unit, balances.immature_watch_only_balance, false, bitmonkeyUnits::separatorAlways));
          ui->labelWatchTotal->setText(bitmonkeyUnits::formatWithUnit(unit, balances.watch_only_balance + balances.unconfirmed_watch_only_balance + balances.immature_watch_only_balance, false, bitmonkeyUnits::separatorAlways));
      }
      // only show immature (newly mined) balance if it's non-zero, so as not to complicate things
      // for the non-mining users
      bool showImmature = balances.immature_balance != 0;
      bool showWatchOnlyImmature = balances.immature_watch_only_balance != 0;
  
      // for symmetry reasons also show immature label when the watch-only one is shown
      ui->labelImmature->setVisible(showImmature || showWatchOnlyImmature);
      ui->labelImmatureText->setVisible(showImmature || showWatchOnlyImmature);
      ui->labelWatchImmature->setVisible(!walletModel->privateKeysDisabled() && showWatchOnlyImmature); // show watch-only immature balance
  }
  
  // show/hide watch-only labels
  void OverviewPage::updateWatchOnlyLabels(bool showWatchOnly)
  {
      ui->labelSpendable->setVisible(showWatchOnly);      // show spendable label (only when watch-only is active)
      ui->labelWatchonly->setVisible(showWatchOnly);      // show watch-only label
      ui->lineWatchBalance->setVisible(showWatchOnly);    // show watch-only balance separator line
      ui->labelWatchAvailable->setVisible(showWatchOnly); // show watch-only available balance
      ui->labelWatchPending->setVisible(showWatchOnly);   // show watch-only pending balance
      ui->labelWatchTotal->setVisible(showWatchOnly);     // show watch-only total balance
  
      if (!showWatchOnly)
          ui->labelWatchImmature->hide();
  }
  
  void OverviewPage::setClientModel(ClientModel *model)
  {
      this->clientModel = model;
      if(model)
      {
          // Show warning if this is a prerelease version
          connect(model, &ClientModel::alertsChanged, this, &OverviewPage::updateAlerts);
          updateAlerts(model->getStatusBarWarnings());
      }
  }
  
  void OverviewPage::setWalletModel(WalletModel *model)
  {
      this->walletModel = model;
      if(model && model->getOptionsModel())
      {
          // Set up transaction list
          filter.reset(new TransactionFilterProxy());
          filter->setSourceModel(model->getTransactionTableModel());
          filter->setLimit(NUM_ITEMS);
          filter->setDynamicSortFilter(true);
          filter->setSortRole(Qt::EditRole);
          filter->setShowInactive(false);
          filter->sort(TransactionTableModel::Date, Qt::DescendingOrder);
  
          ui->listTransactions->setModel(filter.get());
          ui->listTransactions->setModelColumn(TransactionTableModel::ToAddress);
  
          // Keep up to date with wallet
          interfaces::Wallet& wallet = model->wallet();
          interfaces::WalletBalances balances = wallet.getBalances();
          setBalance(balances);
          connect(model, &WalletModel::balanceChanged, this, &OverviewPage::setBalance);
  
          connect(model->getOptionsModel(), &OptionsModel::displayUnitChanged, this, &OverviewPage::updateDisplayUnit);
  
          updateWatchOnlyLabels(wallet.haveWatchOnly() && !model->privateKeysDisabled());
          connect(model, &WalletModel::notifyWatchonlyChanged, [this](bool showWatchOnly) {
              updateWatchOnlyLabels(showWatchOnly && !walletModel->privateKeysDisabled());
          });
      }
  
      // update the display unit, to not use the default ("BTM")
      updateDisplayUnit();
  }
  
  void OverviewPage::updateDisplayUnit()
  {
      if(walletModel && walletModel->getOptionsModel())
      {
          if (m_balances.balance != -1) {
              setBalance(m_balances);
          }
  
          // Update txdelegate->unit with the current unit
          txdelegate->unit = walletModel->getOptionsModel()->getDisplayUnit();
  
          ui->listTransactions->update();
      }
  }
  
  void OverviewPage::updateAlerts(const QString &warnings)
  {
      this->ui->labelAlerts->setVisible(!warnings.isEmpty());
      this->ui->labelAlerts->setText(warnings);
  }
  
  void OverviewPage::showOutOfSyncWarning(bool fShow)
  {
      ui->labelWalletStatus->setVisible(fShow);
      ui->labelTransactionsStatus->setVisible(fShow);
  }
  