text: /*
   * Qt4 TrollCoin GUI.
   *
   * W.J. van der Laan 2011-2012
   * The Bitcoin Developers 2011-2012
   * The TrollCoin Developers 2011-2013
   */
  #include "bitcoingui.h"
  #include "transactiontablemodel.h"
  #include "addressbookpage.h"
  #include "sendcoinsdialog.h"
  #include "signverifymessagedialog.h"
  #include "multisigdialog.h"
  #include "optionsdialog.h"
  #include "aboutdialog.h"
  #include "clientmodel.h"
  #include "walletmodel.h"
  #include "editaddressdialog.h"
  #include "optionsmodel.h"
  #include "transactiondescdialog.h"
  #include "addresstablemodel.h"
  #include "transactionview.h"
  #include "mintingview.h"
  #include "overviewpage.h"
  #include "bitcoinunits.h"
  #include "guiconstants.h"
  #include "askpassphrasedialog.h"
  #include "notificator.h"
  #include "guiutil.h"
  #include "rpcconsole.h"
  #include "wallet.h"
  
  #ifdef Q_OS_MAC
  #include "macdockiconhandler.h"
  #endif
  
  #include <QApplication>
  #include <QMainWindow>
  #include <QMenuBar>
  #include <QMenu>
  #include <QIcon>
  #include <QTabWidget>
  #include <QVBoxLayout>
  #include <QToolBar>
  #include <QStatusBar>
  #include <QLabel>
  #include <QLineEdit>
  #include <QPushButton>
  #include <QLocale>
  #include <QMessageBox>
  #include <QProgressBar>
  #include <QStackedWidget>
  #include <QDateTime>
  #include <QFileDialog>
  #include <QDesktopServices>
  #include <QTimer>
  #include <QDragEnterEvent>
  #include <QUrl>
  #include <QStyle>
  
  #include <iostream>
  
  BitcoinGUI::BitcoinGUI(QWidget *parent):
      QMainWindow(parent),
      clientModel(0),
      walletModel(0),
      encryptWalletAction(0),
      unlockForMintingAction(0),
      changePassphraseAction(0),
      aboutQtAction(0),
      trayIcon(0),
      notificator(0),
      rpcConsole(0),
      spinnerFrame(0)
  {
      resize(850, 550);
      setWindowTitle(tr("TrollCoin") + " - " + tr("Wallet"));
  #ifndef Q_OS_MAC
      setWindowIcon(QIcon(":icons/TrollCoin"));
  #else
      setUnifiedTitleAndToolBarOnMac(true);
      QApplication::setAttribute(Qt::AA_DontShowIconsInMenus);
  #endif
      // Accept D&D of URIs
      setAcceptDrops(true);
  
      // Create actions for the toolbar, menu bar and tray/dock icon
      createActions();
  
      // Create application menu bar
      createMenuBar();
  
      // Create the toolbars
      createToolBars();
  
      // Create the tray icon (or setup the dock icon)
      createTrayIcon();
  
      // Create tabs
      overviewPage = new OverviewPage();
  
      transactionsPage = new QWidget(this);
      QVBoxLayout *vbox = new QVBoxLayout();
      transactionView = new TransactionView(this);
      vbox->addWidget(transactionView);
      transactionsPage->setLayout(vbox);
  
      mintingPage = new QWidget(this);
      QVBoxLayout *vboxMinting = new QVBoxLayout();
      mintingView = new MintingView(this);
      vboxMinting->addWidget(mintingView);
      mintingPage->setLayout(vboxMinting);
  
      addressBookPage = new AddressBookPage(AddressBookPage::ForEditing, AddressBookPage::SendingTab);
  
      receiveCoinsPage = new AddressBookPage(AddressBookPage::ForEditing, AddressBookPage::ReceivingTab);
  
      sendCoinsPage = new SendCoinsDialog(this);
  
      messagePage = new SignVerifyMessageDialog(this);
  
      multisigPage = new MultisigDialog(this);
  
      centralWidget = new QStackedWidget(this);
      centralWidget->addWidget(overviewPage);
      centralWidget->addWidget(transactionsPage);
      centralWidget->addWidget(mintingPage);
      centralWidget->addWidget(addressBookPage);
      centralWidget->addWidget(receiveCoinsPage);
      centralWidget->addWidget(sendCoinsPage);
  #ifdef FIRST_CLASS_MESSAGING
      centralWidget->addWidget(messagePage);
  #endif
      setCentralWidget(centralWidget);
  
      // Create status bar
      statusBar();
  
      // Status bar notification icons
      QFrame *frameBlocks = new QFrame();
      frameBlocks->setContentsMargins(0,0,0,0);
      frameBlocks->setMinimumWidth(56);
      frameBlocks->setMaximumWidth(56);
      QHBoxLayout *frameBlocksLayout = new QHBoxLayout(frameBlocks);
      frameBlocksLayout->setContentsMargins(3,0,3,0);
      frameBlocksLayout->setSpacing(3);
      labelEncryptionIcon = new QLabel();
      labelConnectionsIcon = new QLabel();
      labelBlocksIcon = new QLabel();
      frameBlocksLayout->addStretch();
      frameBlocksLayout->addWidget(labelEncryptionIcon);
      frameBlocksLayout->addStretch();
      frameBlocksLayout->addWidget(labelConnectionsIcon);
      frameBlocksLayout->addStretch();
      frameBlocksLayout->addWidget(labelBlocksIcon);
      frameBlocksLayout->addStretch();
  
      // Progress bar and label for blocks download
      progressBarLabel = new QLabel();
      progressBarLabel->setVisible(false);
      progressBar = new QProgressBar();
      progressBar->setAlignment(Qt::AlignCenter);
      progressBar->setVisible(false);
  
      // Override style sheet for progress bar for styles that have a segmented progress bar,
      // as they make the text unreadable (workaround for issue #1071)
      // See https://qt-project.org/doc/qt-4.8/gallery.html
      QString curStyle = qApp->style()->metaObject()->className();
      if(curStyle == "QWindowsStyle" || curStyle == "QWindowsXPStyle")
      {
          progressBar->setStyleSheet("QProgressBar { background-color: #e8e8e8; border: 1px solid grey; border-radius: 7px; padding: 1px; text-align: center; } QProgressBar::chunk { background: QLinearGradient(x1: 0, y1: 0, x2: 1, y2: 0, stop: 0 #FF8000, stop: 1 orange); border-radius: 7px; margin: 0px; }");
      }
  
      statusBar()->addWidget(progressBarLabel);
      statusBar()->addWidget(progressBar);
      statusBar()->addPermanentWidget(frameBlocks);
  
      // Clicking on a transaction on the overview page simply sends you to transaction history page
      connect(overviewPage, SIGNAL(transactionClicked(QModelIndex)), this, SLOT(gotoHistoryPage()));
      connect(overviewPage, SIGNAL(transactionClicked(QModelIndex)), transactionView, SLOT(focusTransaction(QModelIndex)));
  
      // Double-clicking on a transaction on the transaction history page shows details
      connect(transactionView, SIGNAL(doubleClicked(QModelIndex)), transactionView, SLOT(showDetails()));
  
      rpcConsole = new RPCConsole(this);
      connect(openRPCConsoleAction, SIGNAL(triggered()), rpcConsole, SLOT(show()));
  
      gotoOverviewPage();
  }
  
  BitcoinGUI::~BitcoinGUI()
  {
  #ifdef Q_OS_MAC
      delete appMenuBar;
  #endif
  }
  
  void BitcoinGUI::createActions()
  {
      QActionGroup *tabGroup = new QActionGroup(this);
  
      overviewAction = new QAction(QIcon(":/icons/overview"), tr("&Overview"), this);
      overviewAction->setToolTip(tr("Show general overview of wallet"));
      overviewAction->setCheckable(true);
      overviewAction->setShortcut(QKeySequence(Qt::ALT + Qt::Key_1));
      tabGroup->addAction(overviewAction);
  
      historyAction = new QAction(QIcon(":/icons/history"), tr("&Transactions"), this);
      historyAction->setToolTip(tr("Browse transaction history"));
      historyAction->setCheckable(true);
      historyAction->setShortcut(QKeySequence(Qt::ALT + Qt::Key_4));
      tabGroup->addAction(historyAction);
  
      mintingAction = new QAction(QIcon(":/icons/history"), tr("&Minting"), this);
      mintingAction->setToolTip(tr("Show your minting capacity"));
      mintingAction->setCheckable(true);
      mintingAction->setShortcut(QKeySequence(Qt::ALT + Qt::Key_5));
      tabGroup->addAction(mintingAction);
  
      addressBookAction = new QAction(QIcon(":/icons/address-book"), tr("&Address Book"), this);
      addressBookAction->setToolTip(tr("Edit the list of stored addresses and labels"));
      addressBookAction->setCheckable(true);
      addressBookAction->setShortcut(QKeySequence(Qt::ALT + Qt::Key_6));
      tabGroup->addAction(addressBookAction);
  
      receiveCoinsAction = new QAction(QIcon(":/icons/receiving_addresses"), tr("&Receive coins"), this);
      receiveCoinsAction->setToolTip(tr("Show the list of addresses for receiving payments"));
      receiveCoinsAction->setCheckable(true);
      receiveCoinsAction->setShortcut(QKeySequence(Qt::ALT + Qt::Key_3));
      tabGroup->addAction(receiveCoinsAction);
  
      sendCoinsAction = new QAction(QIcon(":/icons/send"), tr("&Send coins"), this);
      sendCoinsAction->setToolTip(tr("Send coins to a TrollCoin address"));
      sendCoinsAction->setCheckable(true);
      sendCoinsAction->setShortcut(QKeySequence(Qt::ALT + Qt::Key_2));
      tabGroup->addAction(sendCoinsAction);
  
      messageAction = new QAction(QIcon(":/icons/edit"), tr("Sign &message..."), this);
      messageAction->setToolTip(tr("Prove you control an address"));
  #ifdef FIRST_CLASS_MESSAGING
      messageAction->setCheckable(true);
  #endif
      tabGroup->addAction(messageAction);
  
      multisigAction = new QAction(QIcon(":/icons/send"), tr("Multisig"), this);
      tabGroup->addAction(multisigAction);
  
      connect(overviewAction, SIGNAL(triggered()), this, SLOT(showNormalIfMinimized()));
      connect(overviewAction, SIGNAL(triggered()), this, SLOT(gotoOverviewPage()));
      connect(historyAction, SIGNAL(triggered()), this, SLOT(showNormalIfMinimized()));
      connect(historyAction, SIGNAL(triggered()), this, SLOT(gotoHistoryPage()));
      connect(mintingAction, SIGNAL(triggered()), this, SLOT(showNormalIfMinimized()));
      connect(mintingAction, SIGNAL(triggered()), this, SLOT(gotoMintingPage()));
      connect(addressBookAction, SIGNAL(triggered()), this, SLOT(showNormalIfMinimized()));
      connect(addressBookAction, SIGNAL(triggered()), this, SLOT(gotoAddressBookPage()));
      connect(receiveCoinsAction, SIGNAL(triggered()), this, SLOT(showNormalIfMinimized()));
      connect(receiveCoinsAction, SIGNAL(triggered()), this, SLOT(gotoReceiveCoinsPage()));
      connect(sendCoinsAction, SIGNAL(triggered()), this, SLOT(showNormalIfMinimized()));
      connect(sendCoinsAction, SIGNAL(triggered()), this, SLOT(gotoSendCoinsPage()));
      connect(messageAction, SIGNAL(triggered()), this, SLOT(showNormalIfMinimized()));
      connect(messageAction, SIGNAL(triggered()), this, SLOT(gotoMessagePage()));
      connect(multisigAction, SIGNAL(triggered()), this, SLOT(showNormalIfMinimized()));
      connect(multisigAction, SIGNAL(triggered()), this, SLOT(gotoMultisigPage()));
  
      quitAction = new QAction(QIcon(":/icons/quit"), tr("E&xit"), this);
      quitAction->setToolTip(tr("Quit application"));
      quitAction->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q));
      quitAction->setMenuRole(QAction::QuitRole);
      aboutAction = new QAction(QIcon(":/icons/TrollCoin"), tr("&About TrollCoin"), this);
      aboutAction->setToolTip(tr("Show information about TrollCoin"));
      aboutAction->setMenuRole(QAction::AboutRole);
      aboutQtAction = new QAction(QIcon(":/trolltech/qmessagebox/images/qtlogo-64.png"), tr("About &Qt"), this);
      aboutQtAction->setToolTip(tr("Show information about Qt"));
      aboutQtAction->setMenuRole(QAction::AboutQtRole);
      optionsAction = new QAction(QIcon(":/icons/options"), tr("&Options..."), this);
      optionsAction->setToolTip(tr("Modify configuration options for TrollCoin"));
      optionsAction->setMenuRole(QAction::PreferencesRole);
      toggleHideAction = new QAction(QIcon(":/icons/TrollCoin"), tr("Show/Hide &TrollCoin"), this);
      toggleHideAction->setToolTip(tr("Show or hide the TrollCoin window"));
      exportAction = new QAction(QIcon(":/icons/export"), tr("&Export..."), this);
      exportAction->setToolTip(tr("Export the data in the current tab to a file"));
      encryptWalletAction = new QAction(QIcon(":/icons/lock_closed"), tr("&Encrypt Wallet..."), this);
      encryptWalletAction->setToolTip(tr("Encrypt or decrypt wallet"));
      encryptWalletAction->setCheckable(true);
      unlockForMintingAction = new QAction(QIcon(":/icons/lock_closed"), tr("&Unlock Wallet for Minting Only"), this);
      unlockForMintingAction->setToolTip(tr("Unlock wallet only for minting. Sending coins will still require the passphrase."));
      unlockForMintingAction->setCheckable(true);
      backupWalletAction = new QAction(QIcon(":/icons/filesave"), tr("&Backup Wallet..."), this);
      backupWalletAction->setToolTip(tr("Backup wallet to another location"));
      changePassphraseAction = new QAction(QIcon(":/icons/key"), tr("&Change Passphrase..."), this);
      changePassphraseAction->setToolTip(tr("Change the passphrase used for wallet encryption"));
      openRPCConsoleAction = new QAction(QIcon(":/icons/debugwindow"), tr("&Debug window"), this);
      openRPCConsoleAction->setToolTip(tr("Open debugging and diagnostic console"));
      editConfigAction = new QAction(QIcon(":/icons/options"), tr("&Edit config..."), this);
      editConfigAction->setToolTip(tr("Edit the TrollCoin.conf file in the default text editor"));
  
      connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
      connect(optionsAction, SIGNAL(triggered()), this, SLOT(optionsClicked()));
      connect(aboutAction, SIGNAL(triggered()), this, SLOT(aboutClicked()));
      connect(aboutQtAction, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
      connect(toggleHideAction, SIGNAL(triggered()), this, SLOT(toggleHidden()));
      connect(encryptWalletAction, SIGNAL(triggered(bool)), this, SLOT(encryptWallet(bool)));
      connect(unlockForMintingAction, SIGNAL(triggered(bool)), this, SLOT(unlockForMinting(bool)));
      connect(backupWalletAction, SIGNAL(triggered()), this, SLOT(backupWallet()));
      connect(changePassphraseAction, SIGNAL(triggered()), this, SLOT(changePassphrase()));
      connect(editConfigAction, SIGNAL(triggered()), this, SLOT(editConfig()));
  }
  
  void BitcoinGUI::createMenuBar()
  {
  #ifdef Q_OS_MAC
      // Create a decoupled menu bar on Mac which stays even if the window is closed
      appMenuBar = new QMenuBar();
  #else
      // Get the main window's menu bar on other platforms
      appMenuBar = menuBar();
  #endif
  
      // Configure the menus
      QMenu *file = appMenuBar->addMenu(tr("&File"));
      file->addAction(backupWalletAction);
      file->addAction(exportAction);
  #ifndef FIRST_CLASS_MESSAGING
      file->addAction(messageAction);
  #endif
      file->addAction(multisigAction);
      file->addSeparator();
      file->addAction(quitAction);
  
      QMenu *settings = appMenuBar->addMenu(tr("&Settings"));
      settings->addAction(encryptWalletAction);
      settings->addAction(unlockForMintingAction);
      settings->addAction(changePassphraseAction);
      settings->addSeparator();
      settings->addAction(optionsAction);
      settings->addAction(editConfigAction);
  
      QMenu *help = appMenuBar->addMenu(tr("&Help"));
      help->addAction(openRPCConsoleAction);
      help->addSeparator();
      help->addAction(aboutAction);
      help->addAction(aboutQtAction);
  }
  
  void BitcoinGUI::createToolBars()
  {
      QToolBar *toolbar = addToolBar(tr("Tabs toolbar"));
      toolbar->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
      toolbar->addAction(overviewAction);
      toolbar->addAction(sendCoinsAction);
      toolbar->addAction(receiveCoinsAction);
      toolbar->addAction(historyAction);
      toolbar->addAction(mintingAction);
      toolbar->addAction(addressBookAction);
  #ifdef FIRST_CLASS_MESSAGING
      toolbar->addAction(messageAction);
  #endif
  
      QToolBar *toolbar2 = addToolBar(tr("Actions toolbar"));
      toolbar2->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
      toolbar2->addAction(exportAction);
  }
  
  void BitcoinGUI::setClientModel(ClientModel *clientModel)
  {
      this->clientModel = clientModel;
      if(clientModel)
      {
          if(clientModel->isTestNet())
          {
              QString title_testnet = windowTitle() + QString(" ") + tr("[testnet]");
              setWindowTitle(title_testnet);
  #ifndef Q_OS_MAC
              setWindowIcon(QIcon(":icons/TrollCoin_testnet"));
  #else
              MacDockIconHandler::instance()->setIcon(QIcon(":icons/TrollCoin_testnet"));
  #endif
              if(trayIcon)
              {
                  trayIcon->setToolTip(title_testnet);
                  trayIcon->setIcon(QIcon(":/icons/toolbar_testnet"));
              }
          }
  
          // Keep up to date with client
          setNumConnections(clientModel->getNumConnections());
          connect(clientModel, SIGNAL(numConnectionsChanged(int)), this, SLOT(setNumConnections(int)));
  
          setNumBlocks(clientModel->getNumBlocks());
          connect(clientModel, SIGNAL(numBlocksChanged(int)), this, SLOT(setNumBlocks(int)));
  
          // Report errors from network/worker thread
          connect(clientModel, SIGNAL(error(QString,QString, bool)), this, SLOT(error(QString,QString,bool)));
  
          rpcConsole->setClientModel(clientModel);
      }
  }
  
  void BitcoinGUI::setWalletModel(WalletModel *walletModel)
  {
      this->walletModel = walletModel;
      if(walletModel)
      {
          // Report errors from wallet thread
          connect(walletModel, SIGNAL(error(QString,QString,bool)), this, SLOT(error(QString,QString,bool)));
  
          // Put transaction list in tabs
          transactionView->setModel(walletModel);
          mintingView->setModel(walletModel);
  
          overviewPage->setModel(walletModel);
          addressBookPage->setModel(walletModel->getAddressTableModel());
          receiveCoinsPage->setModel(walletModel->getAddressTableModel());
          sendCoinsPage->setModel(walletModel);
          messagePage->setModel(walletModel);
          multisigPage->setModel(walletModel);
  
          setEncryptionStatus(walletModel->getEncryptionStatus());
          connect(walletModel, SIGNAL(encryptionStatusChanged(int)), this, SLOT(setEncryptionStatus(int)));
  
          // Balloon pop-up for new transaction
          connect(walletModel->getTransactionTableModel(), SIGNAL(rowsInserted(QModelIndex,int,int)),
                  this, SLOT(incomingTransaction(QModelIndex,int,int)));
  
          // Ask for passphrase if needed
          connect(walletModel, SIGNAL(requireUnlock()), this, SLOT(unlockWallet()));
      }
  }
  
  void BitcoinGUI::createTrayIcon()
  {
      QMenu *trayIconMenu;
  #ifndef Q_OS_MAC
      trayIcon = new QSystemTrayIcon(this);
      trayIconMenu = new QMenu(this);
      trayIcon->setContextMenu(trayIconMenu);
      trayIcon->setToolTip(tr("TrollCoin client"));
      trayIcon->setIcon(QIcon(":/icons/toolbar"));
      connect(trayIcon, SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
              this, SLOT(trayIconActivated(QSystemTrayIcon::ActivationReason)));
      trayIcon->show();
  #else
      // Note: On Mac, the dock icon is used to provide the tray's functionality.
      MacDockIconHandler *dockIconHandler = MacDockIconHandler::instance();
      trayIconMenu = dockIconHandler->dockMenu();
      dockIconHandler->setMainWindow((QMainWindow *)this);
  #endif
  
      // Configuration of the tray icon (or dock icon) icon menu
      trayIconMenu->addAction(toggleHideAction);
      trayIconMenu->addAction(openRPCConsoleAction);
      trayIconMenu->addSeparator();
      trayIconMenu->addAction(messageAction);
  #ifndef FIRST_CLASS_MESSAGING
      trayIconMenu->addSeparator();
  #endif
      trayIconMenu->addAction(sendCoinsAction);
      trayIconMenu->addAction(receiveCoinsAction);
      trayIconMenu->addAction(multisigAction);
      trayIconMenu->addSeparator();
      trayIconMenu->addAction(optionsAction);
      trayIconMenu->addAction(editConfigAction);
  #ifndef Q_OS_MAC // This is built-in on Mac
      trayIconMenu->addSeparator();
      trayIconMenu->addAction(quitAction);
  #endif
  
      notificator = new Notificator(qApp->applicationName(), trayIcon);
  }
  
  #ifndef Q_OS_MAC
  void BitcoinGUI::trayIconActivated(QSystemTrayIcon::ActivationReason reason)
  {
      if(reason == QSystemTrayIcon::Trigger)
      {
          // Click on system tray icon triggers "show/hide TrollCoin"
          toggleHideAction->trigger();
      }
  }
  #endif
  
  void BitcoinGUI::optionsClicked()
  {
      if(!clientModel || !clientModel->getOptionsModel())
          return;
      OptionsDialog dlg;
      dlg.setModel(clientModel->getOptionsModel());
      dlg.exec();
  }
  
  void BitcoinGUI::aboutClicked()
  {
      AboutDialog dlg;
      dlg.setModel(clientModel);
      dlg.exec();
  }
  
  void BitcoinGUI::setNumConnections(int count)
  {
      QString icon;
      switch(count)
      {
      case 0: icon = ":/icons/connect_0"; break;
      case 1: case 2: case 3: icon = ":/icons/connect_1"; break;
      case 4: case 5: case 6: icon = ":/icons/connect_2"; break;
      case 7: case 8: case 9: icon = ":/icons/connect_3"; break;
      default: icon = ":/icons/connect_4"; break;
      }
      labelConnectionsIcon->setPixmap(QIcon(icon).pixmap(STATUSBAR_ICONSIZE,STATUSBAR_ICONSIZE));
      labelConnectionsIcon->setToolTip(tr("%n active connection(s) to TrollCoin network", "", count));
  }
  
  void BitcoinGUI::setNumBlocks(int count)
  {
      // don't show / hide progressBar and it's label if we have no connection(s) to the network
      if (!clientModel || clientModel->getNumConnections() == 0)
      {
          progressBarLabel->setVisible(false);
          progressBar->setVisible(false);
  
          return;
      }
  
      int nTotalBlocks = clientModel->getNumBlocksOfPeers();
      QString tooltip;
  
      if(count < nTotalBlocks)
      {
          int nRemainingBlocks = nTotalBlocks - count;
          float nPercentageDone = count / (nTotalBlocks * 0.01f);
  
          if (clientModel->getStatusBarWarnings() == "")
          {
              progressBarLabel->setText(tr("Synchronizing with network..."));
              progressBarLabel->setVisible(true);
              progressBar->setFormat(tr("~%n block(s) remaining", "", nRemainingBlocks));
              progressBar->setMaximum(nTotalBlocks);
              progressBar->setValue(count);
              progressBar->setVisible(true);
          }
          else
          {
              progressBarLabel->setText(clientModel->getStatusBarWarnings());
              progressBarLabel->setVisible(true);
              progressBar->setVisible(false);
          }
          tooltip = tr("Downloaded %1 of %2 blocks of transaction history (%3 percent done).").arg(count).arg(nTotalBlocks).arg(nPercentageDone, 0, 'f', 2);
      }
      else
      {
          if (clientModel->getStatusBarWarnings() == "")
              progressBarLabel->setVisible(false);
          else
          {
              progressBarLabel->setText(clientModel->getStatusBarWarnings());
              progressBarLabel->setVisible(true);
          }
          progressBar->setVisible(false);
          tooltip = tr("Downloaded %1 blocks of transaction history.").arg(count);
      }
  
      QDateTime now = QDateTime::currentDateTime();
      QDateTime lastBlockDate = clientModel->getLastBlockDate();
      int secs = lastBlockDate.secsTo(now);
      QString text;
  
      // Represent time from last generated block in human readable text
      if(secs <= 0)
      {
          // Fully up to date. Leave text empty.
      }
      else if(secs < 60)
      {
          text = tr("%n second(s) ago","",secs);
      }
      else if(secs < 60*60)
      {
          text = tr("%n minute(s) ago","",secs/60);
      }
      else if(secs < 24*60*60)
      {
          text = tr("%n hour(s) ago","",secs/(60*60));
      }
      else
      {
          text = tr("%n day(s) ago","",secs/(60*60*24));
      }
  
      // Set icon state: spinning if catching up, tick otherwise
      if(secs < 9*60 && count >= nTotalBlocks)
      {
          tooltip = tr("Up to date") + QString(".<br>") + tooltip;
          labelBlocksIcon->setPixmap(QIcon(":/icons/synced").pixmap(STATUSBAR_ICONSIZE, STATUSBAR_ICONSIZE));
  
          overviewPage->showOutOfSyncWarning(false);
      }
      else
      {
          tooltip = tr("Catching up...") + QString("<br>") + tooltip;
          labelBlocksIcon->setPixmap(QIcon(QString(
              ":/movies/spinner-%1").arg(spinnerFrame, 3, 10, QChar('0')))
              .pixmap(STATUSBAR_ICONSIZE, STATUSBAR_ICONSIZE));
          spinnerFrame = (spinnerFrame + 1) % SPINNER_FRAMES;
  
          overviewPage->showOutOfSyncWarning(true);
      }
  
      if(!text.isEmpty())
      {
          tooltip += QString("<br>");
          tooltip += tr("Last received block was generated %1.").arg(text);
      }
  
      // Don't word-wrap this (fixed-width) tooltip
      tooltip = QString("<nobr>") + tooltip + QString("</nobr>");
  
      labelBlocksIcon->setToolTip(tooltip);
      progressBarLabel->setToolTip(tooltip);
      progressBar->setToolTip(tooltip);
  }
  
  void BitcoinGUI::error(const QString &title, const QString &message, bool modal)
  {
      // Report errors from network/worker thread
      if(modal)
      {
          QMessageBox::critical(this, title, message, QMessageBox::Ok, QMessageBox::Ok);
      } else {
          notificator->notify(Notificator::Critical, title, message);
      }
  }
  
  void BitcoinGUI::changeEvent(QEvent *e)
  {
      QMainWindow::changeEvent(e);
  #ifndef Q_OS_MAC // Ignored on Mac
      if(e->type() == QEvent::WindowStateChange)
      {
          if(clientModel && clientModel->getOptionsModel()->getMinimizeToTray())
          {
              QWindowStateChangeEvent *wsevt = static_cast<QWindowStateChangeEvent*>(e);
              if(!(wsevt->oldState() & Qt::WindowMinimized) && isMinimized())
              {
                  QTimer::singleShot(0, this, SLOT(hide()));
                  e->ignore();
              }
          }
      }
  #endif
  }
  
  void BitcoinGUI::closeEvent(QCloseEvent *event)
  {
      if(clientModel)
      {
  #ifndef Q_OS_MAC // Ignored on Mac
          if(!clientModel->getOptionsModel()->getMinimizeToTray() &&
             !clientModel->getOptionsModel()->getMinimizeOnClose())
          {
              qApp->quit();
          }
  #endif
      }
      QMainWindow::closeEvent(event);
  }
  
  void BitcoinGUI::askFee(qint64 nFeeRequired, bool *payFee)
  {
      QString strMessage =
          tr("This transaction is over the size limit. You can still send it for a fee of %1. Do you want to pay the fee?").arg(
                  BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, nFeeRequired));
      QMessageBox::StandardButton retval = QMessageBox::question(
            this, tr("Confirm transaction fee"), strMessage,
            QMessageBox::Yes|QMessageBox::Cancel, QMessageBox::Yes);
      *payFee = (retval == QMessageBox::Yes);
  }
  
  void BitcoinGUI::incomingTransaction(const QModelIndex & parent, int start, int end)
  {
      if(!walletModel || !clientModel)
          return;
      TransactionTableModel *ttm = walletModel->getTransactionTableModel();
      qint64 amount = ttm->index(start, TransactionTableModel::Amount, parent)
                      .data(Qt::EditRole).toULongLong();
      if(!clientModel->inInitialBlockDownload())
      {
          // On new transaction, make an info balloon
          // Unless the initial block download is in progress, to prevent balloon-spam
          QString date = ttm->index(start, TransactionTableModel::Date, parent)
                          .data().toString();
          QString type = ttm->index(start, TransactionTableModel::Type, parent)
                          .data().toString();
          QString address = ttm->index(start, TransactionTableModel::ToAddress, parent)
                          .data().toString();
          QIcon icon = qvariant_cast<QIcon>(ttm->index(start,
                              TransactionTableModel::ToAddress, parent)
                          .data(Qt::DecorationRole));
  
          notificator->notify(Notificator::Information,
                              (amount)<0 ? tr("Sent transaction") :
                                           tr("Incoming transaction"),
                                tr("Date: %1\n"
                                   "Amount: %2\n"
                                   "Type: %3\n"
                                   "Address: %4\n")
                                .arg(date)
                                .arg(BitcoinUnits::formatWithUnit(walletModel->getOptionsModel()->getDisplayUnit(), amount, true))
                                .arg(type)
                                .arg(address), icon);
      }
  }
  
  void BitcoinGUI::gotoOverviewPage()
  {
      overviewAction->setChecked(true);
      centralWidget->setCurrentWidget(overviewPage);
  
      exportAction->setEnabled(false);
      disconnect(exportAction, SIGNAL(triggered()), 0, 0);
  }
  
  void BitcoinGUI::gotoHistoryPage()
  {
      historyAction->setChecked(true);
      centralWidget->setCurrentWidget(transactionsPage);
  
      exportAction->setEnabled(true);
      disconnect(exportAction, SIGNAL(triggered()), 0, 0);
      connect(exportAction, SIGNAL(triggered()), transactionView, SLOT(exportClicked()));
  }
  
  void BitcoinGUI::gotoMintingPage()
  {
      mintingAction->setChecked(true);
      centralWidget->setCurrentWidget(mintingPage);
  
      exportAction->setEnabled(true);
      disconnect(exportAction, SIGNAL(triggered()), 0, 0);
      connect(exportAction, SIGNAL(triggered()), mintingView, SLOT(exportClicked()));
  }
  
  void BitcoinGUI::gotoAddressBookPage()
  {
      addressBookAction->setChecked(true);
      centralWidget->setCurrentWidget(addressBookPage);
  
      exportAction->setEnabled(true);
      disconnect(exportAction, SIGNAL(triggered()), 0, 0);
      connect(exportAction, SIGNAL(triggered()), addressBookPage, SLOT(exportClicked()));
  }
  
  void BitcoinGUI::gotoReceiveCoinsPage()
  {
      receiveCoinsAction->setChecked(true);
      centralWidget->setCurrentWidget(receiveCoinsPage);
  
      exportAction->setEnabled(true);
      disconnect(exportAction, SIGNAL(triggered()), 0, 0);
      connect(exportAction, SIGNAL(triggered()), receiveCoinsPage, SLOT(exportClicked()));
  }
  
  void BitcoinGUI::gotoSendCoinsPage()
  {
      sendCoinsAction->setChecked(true);
      centralWidget->setCurrentWidget(sendCoinsPage);
  
      exportAction->setEnabled(false);
      disconnect(exportAction, SIGNAL(triggered()), 0, 0);
  }
  
  void BitcoinGUI::gotoMessagePage()
  {
  #ifdef FIRST_CLASS_MESSAGING
      messageAction->setChecked(true);
      centralWidget->setCurrentWidget(messagePage);
  
      exportAction->setEnabled(false);
      disconnect(exportAction, SIGNAL(triggered()), 0, 0);
  #else
      messagePage->show();
      messagePage->setFocus();
  #endif
  }
  
  void BitcoinGUI::gotoMultisigPage()
  {
      multisigPage->show();
      multisigPage->setFocus();
  }
  
  void BitcoinGUI::dragEnterEvent(QDragEnterEvent *event)
  {
      // Accept only URIs
      if(event->mimeData()->hasUrls())
          event->acceptProposedAction();
  }
  
  void BitcoinGUI::dropEvent(QDropEvent *event)
  {
      if(event->mimeData()->hasUrls())
      {
          gotoSendCoinsPage();
          QList<QUrl> uris = event->mimeData()->urls();
          foreach(const QUrl &uri, uris)
          {
              sendCoinsPage->handleURI(uri.toString());
          }
      }
  
      event->acceptProposedAction();
  }
  
  void BitcoinGUI::handleURI(QString strURI)
  {
      gotoSendCoinsPage();
      sendCoinsPage->handleURI(strURI);
  
      showNormalIfMinimized();
  }
  
  void BitcoinGUI::setEncryptionStatus(int status)
  {
      switch(status)
      {
      case WalletModel::Unencrypted:
          labelEncryptionIcon->hide();
          encryptWalletAction->setChecked(false);
          changePassphraseAction->setEnabled(false);
          encryptWalletAction->setEnabled(true);
          unlockForMintingAction->setEnabled(false);
          unlockForMintingAction->setChecked(false);
          break;
      case WalletModel::Unlocked:
          labelEncryptionIcon->show();
          labelEncryptionIcon->setPixmap(QIcon(":/icons/lock_open").pixmap(STATUSBAR_ICONSIZE,STATUSBAR_ICONSIZE));
          labelEncryptionIcon->setToolTip(fWalletUnlockMintOnly? tr("Wallet is <b>encrypted</b> and currently <b>unlocked for block minting only</b>") : tr("Wallet is <b>encrypted</b> and currently <b>unlocked</b>"));
          encryptWalletAction->setChecked(true);
          changePassphraseAction->setEnabled(true);
          encryptWalletAction->setEnabled(false); // TODO: decrypt currently not supported
          unlockForMintingAction->setEnabled(fWalletUnlockMintOnly);
          unlockForMintingAction->setChecked(fWalletUnlockMintOnly);
          break;
      case WalletModel::Locked:
          labelEncryptionIcon->show();
          labelEncryptionIcon->setPixmap(QIcon(":/icons/lock_closed").pixmap(STATUSBAR_ICONSIZE,STATUSBAR_ICONSIZE));
          labelEncryptionIcon->setToolTip(tr("Wallet is <b>encrypted</b> and currently <b>locked</b>"));
          encryptWalletAction->setChecked(true);
          changePassphraseAction->setEnabled(true);
          encryptWalletAction->setEnabled(false); // TODO: decrypt currently not supported
          unlockForMintingAction->setEnabled(true);
          unlockForMintingAction->setChecked(false);
          break;
      }
  }
  
  void BitcoinGUI::encryptWallet(bool status)
  {
      if(!walletModel)
          return;
      AskPassphraseDialog dlg(status ? AskPassphraseDialog::Encrypt:
                                       AskPassphraseDialog::Decrypt, this);
      dlg.setModel(walletModel);
      dlg.exec();
  
      setEncryptionStatus(walletModel->getEncryptionStatus());
  }
  
  void BitcoinGUI::unlockForMinting(bool status)
  {
      if(!walletModel)
          return;
  
      if (status)
      {
          if(walletModel->getEncryptionStatus() != WalletModel::Locked)
              return;
  
          AskPassphraseDialog dlg(AskPassphraseDialog::Unlock, this);
          dlg.setModel(walletModel);
          dlg.exec();
  
          if(walletModel->getEncryptionStatus() != WalletModel::Unlocked)
              return;
  
          fWalletUnlockMintOnly = true;
      }
      else
      {
          if(walletModel->getEncryptionStatus() != WalletModel::Unlocked)
              return;
  
          if (!fWalletUnlockMintOnly)
              return;
  
          walletModel->setWalletLocked(true);
          fWalletUnlockMintOnly = false;
      }
  }
  
  void BitcoinGUI::backupWallet()
  {
      QString saveDir = QDesktopServices::storageLocation(QDesktopServices::DocumentsLocation);
      QString filename = QFileDialog::getSaveFileName(this, tr("Backup Wallet"), saveDir, tr("Wallet Data (*.dat)"));
      if(!filename.isEmpty()) {
          if(!walletModel->backupWallet(filename)) {
              QMessageBox::warning(this, tr("Backup Failed"), tr("There was an error trying to save the wallet data to the new location."));
          }
      }
  }
  
  void BitcoinGUI::changePassphrase()
  {
      AskPassphraseDialog dlg(AskPassphraseDialog::ChangePass, this);
      dlg.setModel(walletModel);
      dlg.exec();
  }
  
  void BitcoinGUI::unlockWallet()
  {
      if(!walletModel)
          return;
      // Unlock wallet when requested by wallet model
      if(walletModel->getEncryptionStatus() == WalletModel::Locked)
      {
          AskPassphraseDialog dlg(AskPassphraseDialog::Unlock, this);
          dlg.setModel(walletModel);
          dlg.exec();
      }
  }
  
  void BitcoinGUI::showNormalIfMinimized(bool fToggleHidden)
  {
      // activateWindow() (sometimes) helps with keyboard focus on Windows
      if (isHidden())
      {
          show();
          activateWindow();
      }
      else if (isMinimized())
      {
          showNormal();
          activateWindow();
      }
      else if (GUIUtil::isObscured(this))
      {
          raise();
          activateWindow();
      }
      else if(fToggleHidden)
          hide();
  }
  
  void BitcoinGUI::toggleHidden()
  {
      showNormalIfMinimized(true);
  }
  
  void BitcoinGUI::editConfig()
  {
      QMessageBox mb;
      mb.setWindowTitle(tr("Notice"));
      mb.setText(tr("Any changes made to the configuration will require restarting the application."));
      mb.exec();
      QDesktopServices::openUrl(QUrl::fromLocalFile(QString::fromStdString(GetConfigFile().string())));
  }
  