text: /*
   * Qt4 bitcoin GUI.
   *
   * W.J. van der Laan 2011
   */
  #include "bitcoingui.h"
  #include "transactiontablemodel.h"
  #include "addressbookpage.h"
  #include "sendcoinsdialog.h"
  #include "optionsdialog.h"
  #include "aboutdialog.h"
  #include "clientmodel.h"
  #include "walletmodel.h"
  #include "guiutil.h"
  #include "editaddressdialog.h"
  #include "optionsmodel.h"
  #include "transactiondescdialog.h"
  #include "addresstablemodel.h"
  #include "transactionview.h"
  #include "overviewpage.h"
  
  #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 <QMovie>
  
  #include <QDebug>
  
  #include <iostream>
  
  BitcoinGUI::BitcoinGUI(QWidget *parent):
      QMainWindow(parent),
      clientModel(0),
      walletModel(0),
      trayIcon(0)
  {
      resize(850, 550);
      setWindowTitle(tr("Bitcoin Wallet"));
      setWindowIcon(QIcon(":icons/bitcoin"));
  
      createActions();
  
      // Menus
      QMenu *file = menuBar()->addMenu("&File");
      file->addAction(sendCoinsAction);
      file->addAction(receiveCoinsAction);
      file->addSeparator();
      file->addAction(quitAction);
      
      QMenu *settings = menuBar()->addMenu("&Settings");
      settings->addAction(optionsAction);
  
      QMenu *help = menuBar()->addMenu("&Help");
      help->addAction(aboutAction);
      
      // Toolbar
      QToolBar *toolbar = addToolBar("Main toolbar");
      toolbar->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
      toolbar->addAction(overviewAction);
      toolbar->addAction(sendCoinsAction);
      toolbar->addAction(receiveCoinsAction);
      toolbar->addAction(historyAction);
      toolbar->addAction(addressBookAction);
  
      QToolBar *toolbar2 = addToolBar("Transactions toolbar");
      toolbar2->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
      toolbar2->addAction(exportAction);
  
      // Overview page
      overviewPage = new OverviewPage();
      QVBoxLayout *vbox = new QVBoxLayout();
  
      transactionView = new TransactionView(this);
      connect(transactionView, SIGNAL(doubleClicked(const QModelIndex&)), transactionView, SLOT(showDetails()));
      vbox->addWidget(transactionView);
  
      transactionsPage = new QWidget(this);
      transactionsPage->setLayout(vbox);
  
      addressBookPage = new AddressBookPage(AddressBookPage::ForEditing, AddressBookPage::SendingTab);
  
      receiveCoinsPage = new AddressBookPage(AddressBookPage::ForEditing, AddressBookPage::ReceivingTab);
  
      sendCoinsPage = new SendCoinsDialog(this);
  
      centralWidget = new QStackedWidget(this);
      centralWidget->addWidget(overviewPage);
      centralWidget->addWidget(transactionsPage);
      centralWidget->addWidget(addressBookPage);
      centralWidget->addWidget(receiveCoinsPage);
      centralWidget->addWidget(sendCoinsPage);
      setCentralWidget(centralWidget);
      
      // Create status bar
      statusBar();
  
      // Status bar "Connections" notification
      QFrame *frameConnections = new QFrame();
      frameConnections->setFrameStyle(QFrame::Panel | QFrame::Sunken);
      frameConnections->setMinimumWidth(150);
      frameConnections->setMaximumWidth(150);
      QHBoxLayout *frameConnectionsLayout = new QHBoxLayout(frameConnections);
      frameConnectionsLayout->setContentsMargins(3,0,3,0);
      frameConnectionsLayout->setSpacing(3);
      labelConnectionsIcon = new QLabel();
      labelConnectionsIcon->setToolTip(tr("Number of connections to other clients"));
      frameConnectionsLayout->addWidget(labelConnectionsIcon);
      labelConnections = new QLabel();
      labelConnections->setToolTip(tr("Number of connections to other clients"));
      frameConnectionsLayout->addWidget(labelConnections);
      frameConnectionsLayout->addStretch();
  
      // Status bar "Blocks" notification
      QFrame *frameBlocks = new QFrame();
      frameBlocks->setFrameStyle(QFrame::Panel | QFrame::Sunken);
      frameBlocks->setMinimumWidth(150);
      frameBlocks->setMaximumWidth(150);
      QHBoxLayout *frameBlocksLayout = new QHBoxLayout(frameBlocks);
      frameBlocksLayout->setContentsMargins(3,0,3,0);
      frameBlocksLayout->setSpacing(3);
      labelBlocksIcon = new QLabel();
      frameBlocksLayout->addWidget(labelBlocksIcon);
      labelBlocks = new QLabel();
      frameBlocksLayout->addWidget(labelBlocks);
      frameBlocksLayout->addStretch();
  
      // Progress bar for blocks download
      progressBarLabel = new QLabel(tr("Synchronizing with network..."));
      progressBarLabel->setVisible(false);
      progressBar = new QProgressBar();
      progressBar->setToolTip(tr("Block chain synchronization in progress"));
      progressBar->setVisible(false);
  
      statusBar()->addWidget(progressBarLabel);
      statusBar()->addWidget(progressBar);
      statusBar()->addPermanentWidget(frameConnections);
      statusBar()->addPermanentWidget(frameBlocks);
  
      createTrayIcon();
  
      syncIconMovie = new QMovie(":/movies/update_spinner", "mng", this);
  
      gotoOverviewPage();
  }
  
  void BitcoinGUI::createActions()
  {
      QActionGroup *tabGroup = new QActionGroup(this);
  
      overviewAction = new QAction(QIcon(":/icons/overview"), tr("&Overview"), this);
      overviewAction->setCheckable(true);
      tabGroup->addAction(overviewAction);
  
      historyAction = new QAction(QIcon(":/icons/history"), tr("&Transactions"), this);
      historyAction->setCheckable(true);
      tabGroup->addAction(historyAction);
  
      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);
      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);
      tabGroup->addAction(receiveCoinsAction);
  
      sendCoinsAction = new QAction(QIcon(":/icons/send"), tr("&Send coins"), this);
      sendCoinsAction->setToolTip(tr("Send coins to a bitcoin address"));
      sendCoinsAction->setCheckable(true);
      tabGroup->addAction(sendCoinsAction);
  
      connect(overviewAction, SIGNAL(triggered()), this, SLOT(gotoOverviewPage()));
      connect(historyAction, SIGNAL(triggered()), this, SLOT(gotoHistoryPage()));
      connect(addressBookAction, SIGNAL(triggered()), this, SLOT(gotoAddressBookPage()));
      connect(receiveCoinsAction, SIGNAL(triggered()), this, SLOT(gotoReceiveCoinsPage()));
      connect(sendCoinsAction, SIGNAL(triggered()), this, SLOT(gotoSendCoinsPage()));
  
      quitAction = new QAction(QIcon(":/icons/quit"), tr("&Exit"), this);
      quitAction->setToolTip(tr("Quit application"));
      aboutAction = new QAction(QIcon(":/icons/bitcoin"), tr("&About"), this);
      aboutAction->setToolTip(tr("Show information about Bitcoin"));
      optionsAction = new QAction(QIcon(":/icons/options"), tr("&Options..."), this);
      optionsAction->setToolTip(tr("Modify configuration options for bitcoin"));
      openBitcoinAction = new QAction(QIcon(":/icons/bitcoin"), tr("Open &Bitcoin"), this);
      openBitcoinAction->setToolTip(tr("Show the Bitcoin window"));
      exportAction = new QAction(QIcon(":/icons/export"), tr("&Export..."), this);
      exportAction->setToolTip(tr("Export data in current view to a file"));
  
      connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
      connect(optionsAction, SIGNAL(triggered()), this, SLOT(optionsClicked()));
      connect(aboutAction, SIGNAL(triggered()), this, SLOT(aboutClicked()));
      connect(openBitcoinAction, SIGNAL(triggered()), this, SLOT(show()));
  }
  
  void BitcoinGUI::setClientModel(ClientModel *clientModel)
  {
      this->clientModel = clientModel;
  
      if(clientModel->isTestNet())
      {
          QString title_testnet = windowTitle() + QString(" ") + tr("[testnet]");
          setWindowTitle(title_testnet);
          setWindowIcon(QIcon(":icons/bitcoin_testnet"));
          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)), this, SLOT(error(QString,QString)));
  }
  
  void BitcoinGUI::setWalletModel(WalletModel *walletModel)
  {
      this->walletModel = walletModel;
  
      // Report errors from wallet thread
      connect(walletModel, SIGNAL(error(QString,QString)), this, SLOT(error(QString,QString)));
  
      // Put transaction list in tabs
      transactionView->setModel(walletModel);
  
      overviewPage->setModel(walletModel);
      addressBookPage->setModel(walletModel->getAddressTableModel());
      receiveCoinsPage->setModel(walletModel->getAddressTableModel());
      sendCoinsPage->setModel(walletModel);
  
      // Balloon popup for new transaction
      connect(walletModel->getTransactionTableModel(), SIGNAL(rowsInserted(const QModelIndex &, int, int)),
              this, SLOT(incomingTransaction(const QModelIndex &, int, int)));
  }
  
  void BitcoinGUI::createTrayIcon()
  {
      QMenu *trayIconMenu = new QMenu(this);
      trayIconMenu->addAction(openBitcoinAction);
      trayIconMenu->addAction(sendCoinsAction);
      trayIconMenu->addAction(optionsAction);
      trayIconMenu->addSeparator();
      trayIconMenu->addAction(quitAction);
  
      trayIcon = new QSystemTrayIcon(this);
      trayIcon->setContextMenu(trayIconMenu);
      trayIcon->setToolTip("Bitcoin client");
      trayIcon->setIcon(QIcon(":/icons/toolbar"));
      connect(trayIcon, SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
              this, SLOT(trayIconActivated(QSystemTrayIcon::ActivationReason)));
      trayIcon->show();
  }
  
  void BitcoinGUI::trayIconActivated(QSystemTrayIcon::ActivationReason reason)
  {
      if(reason == QSystemTrayIcon::DoubleClick)
      {
          // Doubleclick on system tray icon triggers "open bitcoin"
          openBitcoinAction->trigger();
      }
  }
  
  void BitcoinGUI::optionsClicked()
  {
      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(16,16));
      labelConnections->setText(tr("%n connection(s)", "", count));
  }
  
  void BitcoinGUI::setNumBlocks(int count)
  {
      int total = clientModel->getTotalBlocksEstimate();
      QString tooltip;
  
      if(count < total)
      {
          progressBarLabel->setVisible(true);
          progressBar->setVisible(true);
          progressBar->setMaximum(total);
          progressBar->setValue(count);
          tooltip = tr("Downloaded %1 of %2 blocks of transaction history.").arg(count).arg(total);
      }
      else
      {
          progressBarLabel->setVisible(false);
          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 < 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));
      }
  
      // In the label we want to be less specific
      QString labelText = text;
      bool spinning = true;
      if(secs < 30*60)
      {
          labelText = "Up to date";
          spinning = false;
      }
  
      tooltip += QString("\n");
      tooltip += tr("Last received block was generated %1.").arg(text);
  
      if(spinning)
      {
          labelBlocksIcon->setMovie(syncIconMovie);
          syncIconMovie->start();
      }
      else
      {
          labelBlocksIcon->setPixmap(QIcon(":/icons/synced").pixmap(16,16));
      }
      labelBlocks->setText(labelText);
  
      labelBlocksIcon->setToolTip(tooltip);
      labelBlocks->setToolTip(tooltip);
      progressBarLabel->setToolTip(tooltip);
      progressBar->setToolTip(tooltip);
  }
  
  void BitcoinGUI::error(const QString &title, const QString &message)
  {
      // Report errors from network/worker thread
      if(trayIcon->supportsMessages())
      {
          // Show as "balloon" message if possible
          trayIcon->showMessage(title, message, QSystemTrayIcon::Critical);
      }
      else
      {
          // Fall back to old fashioned popup dialog if not
          QMessageBox::critical(this, title,
              message,
              QMessageBox::Ok, QMessageBox::Ok);
      }
  }
  
  void BitcoinGUI::changeEvent(QEvent *e)
  {
      if (e->type() == QEvent::WindowStateChange)
      {
          if(clientModel->getOptionsModel()->getMinimizeToTray())
          {
              if (isMinimized())
              {
                  hide();
                  e->ignore();
              }
              else
              {
                  e->accept();
              }
          }
      }
      QMainWindow::changeEvent(e);
  }
  
  void BitcoinGUI::closeEvent(QCloseEvent *event)
  {
      if(!clientModel->getOptionsModel()->getMinimizeToTray() &&
         !clientModel->getOptionsModel()->getMinimizeOnClose())
      {
          qApp->quit();
      }
      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, "
            "which goes to the nodes that process your transaction and helps to support the network.  "
            "Do you want to pay the fee?").arg(GUIUtil::formatMoney(nFeeRequired));
      QMessageBox::StandardButton retval = QMessageBox::question(
            this, tr("Sending..."), strMessage,
            QMessageBox::Yes|QMessageBox::Cancel, QMessageBox::Yes);
      *payFee = (retval == QMessageBox::Yes);
  }
  
  void BitcoinGUI::incomingTransaction(const QModelIndex & parent, int start, int end)
  {
      TransactionTableModel *ttm = walletModel->getTransactionTableModel();
      qint64 amount = ttm->index(start, TransactionTableModel::Amount, parent)
                      .data(Qt::EditRole).toULongLong();
      if(!clientModel->inInitialBlockDownload())
      {
          // On incoming 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();
  
          trayIcon->showMessage((amount)<0 ? tr("Sent transaction") :
                                             tr("Incoming transaction"),
                                tr("Date: ") + date + "\n" +
                                tr("Amount: ") + GUIUtil::formatMoney(amount, true) + "\n" +
                                tr("Type: ") + type + "\n" +
                                tr("Address: ") + address + "\n",
                                QSystemTrayIcon::Information);
      }
  }
  
  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::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()
  {
  #ifdef DEBUG_GUI
      qDebug()<<__FUNCTION__<<":1"
  #endif 
  
      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()
  {
  #ifdef DEBUG_GUI
      qDebug()<<__FUNCTION__<<":1"
  #endif
  
      sendCoinsAction->setChecked(true);
      sendCoinsPage->clear();
      centralWidget->setCurrentWidget(sendCoinsPage);
  
      exportAction->setEnabled(false);
      disconnect(exportAction, SIGNAL(triggered()), 0, 0);
  }
  
  