text: #include "overviewpage.h"
  #include "ui_overviewpage.h"
  
  #include "walletmodel.h"
  #include "bitcoinunits.h"
  #include "optionsmodel.h"
  #include "transactiontablemodel.h"
  #include "transactionfilterproxy.h"
  #include "guiutil.h"
  #include "guiconstants.h"
  
  #include <QAbstractItemDelegate>
  #include <QPainter>
  
  #define DECORATION_SIZE 64
  #define NUM_ITEMS 3
  
  class TxViewDelegate : public QAbstractItemDelegate
  {
      Q_OBJECT
  public:
      TxViewDelegate(): QAbstractItemDelegate(), unit(BitcoinUnits::BTC)
      {
  
      }
  
      inline void paint(QPainter *painter, const QStyleOptionViewItem &option,
                        const QModelIndex &index ) const
      {
          painter->save();
  
          QIcon icon = qvariant_cast<QIcon>(index.data(Qt::DecorationRole));
          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.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(qVariantCanConvert<QColor>(value))
          {
              foreground = qvariant_cast<QColor>(value);
          }
  
          painter->setPen(foreground);
          painter->drawText(addressRect, Qt::AlignLeft|Qt::AlignVCenter, address);
  
          if(amount < 0)
          {
              foreground = COLOR_NEGATIVE;
          }
          else if(!confirmed)
          {
              foreground = COLOR_UNCONFIRMED;
          }
          else
          {
              foreground = option.palette.color(QPalette::Text);
          }
          painter->setPen(foreground);
          QString amountText = BitcoinUnits::formatWithUnit(unit, amount, true);
          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;
  
  };
  #include "overviewpage.moc"
  
  OverviewPage::OverviewPage(QWidget *parent) :
      QWidget(parent),
      ui(new Ui::OverviewPage),
      currentBalance(-1),
      currentUnconfirmedBalance(-1),
      currentImmatureBalance(-1),
      txdelegate(new TxViewDelegate()),
      filter(0)
  {
      ui->setupUi(this);
  
      // 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, SIGNAL(clicked(QModelIndex)), this, SLOT(handleTransactionClicked(QModelIndex)));
  
      // init "out of sync" warning labels
      ui->labelWalletStatus->setText("(" + tr("Out of sync") + ")");
      ui->labelTransactionsStatus->setText("(" + tr("Out of sync") + ")");
  
      // start with displaying the "out of sync" warnings
      showOutOfSyncWarning(true);
  }
  
  void OverviewPage::handleTransactionClicked(const QModelIndex &index)
  {
      if(filter)
          emit transactionClicked(filter->mapToSource(index));
  }
  
  OverviewPage::~OverviewPage()
  {
      delete ui;
  }
  
  void OverviewPage::setBalance(qint64 balance, qint64 unconfirmedBalance, qint64 immatureBalance)
  {
      int unit = model->getOptionsModel()->getDisplayUnit();
      currentBalance = balance;
      currentUnconfirmedBalance = unconfirmedBalance;
      currentImmatureBalance = immatureBalance;
      ui->labelBalance->setText(BitcoinUnits::formatWithUnit(unit, balance));
      ui->labelUnconfirmed->setText(BitcoinUnits::formatWithUnit(unit, unconfirmedBalance));
      ui->labelImmature->setText(BitcoinUnits::formatWithUnit(unit, immatureBalance));
  
      // only show immature (newly mined) balance if it's non-zero, so as not to complicate things
      // for the non-mining users
      bool showImmature = immatureBalance != 0;
      ui->labelImmature->setVisible(showImmature);
      ui->labelImmatureText->setVisible(showImmature);
  }
  
  void OverviewPage::setNumTransactions(int count)
  {
      ui->labelNumTransactions->setText(QLocale::system().toString(count));
  }
  
  void OverviewPage::setModel(WalletModel *model)
  {
      this->model = model;
      if(model && model->getOptionsModel())
      {
          // Set up transaction list
          filter = new TransactionFilterProxy();
          filter->setSourceModel(model->getTransactionTableModel());
          filter->setLimit(NUM_ITEMS);
          filter->setDynamicSortFilter(true);
          filter->setSortRole(Qt::EditRole);
          filter->sort(TransactionTableModel::Status, Qt::DescendingOrder);
  
          ui->listTransactions->setModel(filter);
          ui->listTransactions->setModelColumn(TransactionTableModel::ToAddress);
  
          // Keep up to date with wallet
          setBalance(model->getBalance(), model->getUnconfirmedBalance(), model->getImmatureBalance());
          connect(model, SIGNAL(balanceChanged(qint64, qint64, qint64)), this, SLOT(setBalance(qint64, qint64, qint64)));
  
          setNumTransactions(model->getNumTransactions());
          connect(model, SIGNAL(numTransactionsChanged(int)), this, SLOT(setNumTransactions(int)));
  
          connect(model->getOptionsModel(), SIGNAL(displayUnitChanged(int)), this, SLOT(updateDisplayUnit()));
      }
  
      // update the display unit, to not use the default ("GOLDC")
      updateDisplayUnit();
  }
  
  void OverviewPage::updateDisplayUnit()
  {
      if(model && model->getOptionsModel())
      {
          if(currentBalance != -1)
              setBalance(currentBalance, currentUnconfirmedBalance, currentImmatureBalance);
  
          // Update txdelegate->unit with the current unit
          txdelegate->unit = model->getOptionsModel()->getDisplayUnit();
  
          ui->listTransactions->update();
      }
  }
  
  void OverviewPage::showOutOfSyncWarning(bool fShow)
  {
      ui->labelWalletStatus->setVisible(fShow);
      ui->labelTransactionsStatus->setVisible(fShow);
  }
  