src/qt/bitcoingui.cpp

   1 /*
   2  * Qt4 bitcoin GUI.
   3  *
   4  * W.J. van der Laan 2011
   5  */
   6 #include "bitcoingui.h"
   7 #include "transactiontablemodel.h"
   8 #include "addressbookpage.h"
   9 #include "sendcoinsdialog.h"
  10 #include "optionsdialog.h"
  11 #include "aboutdialog.h"
  12 #include "clientmodel.h"
  13 #include "walletmodel.h"
  14 #include "editaddressdialog.h"
  15 #include "optionsmodel.h"
  16 #include "transactiondescdialog.h"
  17 #include "addresstablemodel.h"
  18 #include "transactionview.h"
  19 #include "overviewpage.h"
  20 #include "bitcoinunits.h"
  21 #include "guiconstants.h"
  22 #include "askpassphrasedialog.h"
  23 #include "notificator.h"
  24 #include "qtwin.h"
  25
  26 #include <QApplication>
  27 #include <QMainWindow>
  28 #include <QMenuBar>
  29 #include <QMenu>
  30 #include <QIcon>
  31 #include <QTabWidget>
  32 #include <QVBoxLayout>
  33 #include <QToolBar>
  34 #include <QStatusBar>
  35 #include <QLabel>
  36 #include <QLineEdit>
  37 #include <QPushButton>
  38 #include <QLocale>
  39 #include <QMessageBox>
  40 #include <QProgressBar>
  41 #include <QStackedWidget>
  42 #include <QDateTime>
  43 #include <QMovie>
  44
  45 #include <QDragEnterEvent>
  46 #include <QUrl>
  47
  48 #include <iostream>
  49
  50 BitcoinGUI::BitcoinGUI(QWidget *parent):
  51     QMainWindow(parent),
  52     clientModel(0),
  53     walletModel(0),
  54     encryptWalletAction(0),
  55     changePassphraseAction(0),
  56     trayIcon(0),
  57     notificator(0)
  58 {
  59     resize(850, 550);
  60     setWindowTitle(tr("Bitcoin Wallet"));
  61     setWindowIcon(QIcon(":icons/bitcoin"));
  62     // Accept D&D of URIs
  63     setAcceptDrops(true);
  64
  65     createActions();
  66
  67     // Menus
  68     QMenu *file = menuBar()->addMenu(tr("&File"));
  69     file->addAction(sendCoinsAction);
  70     file->addAction(receiveCoinsAction);
  71     file->addSeparator();
  72     file->addAction(quitAction);
  73
  74     QMenu *settings = menuBar()->addMenu(tr("&Settings"));
  75     settings->addAction(encryptWalletAction);
  76     settings->addAction(changePassphraseAction);
  77     settings->addSeparator();
  78     settings->addAction(optionsAction);
  79
  80     QMenu *help = menuBar()->addMenu(tr("&Help"));
  81     help->addAction(aboutAction);
  82
  83     // Toolbars
  84     QToolBar *toolbar = addToolBar(tr("Tabs toolbar"));
  85     toolbar->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
  86     toolbar->addAction(overviewAction);
  87     toolbar->addAction(sendCoinsAction);
  88     toolbar->addAction(receiveCoinsAction);
  89     toolbar->addAction(historyAction);
  90     toolbar->addAction(addressBookAction);
  91
  92     QToolBar *toolbar2 = addToolBar(tr("Actions toolbar"));
  93     toolbar2->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
  94     toolbar2->addAction(exportAction);
  95
  96     // Create tabs
  97     overviewPage = new OverviewPage();
  98
  99     transactionsPage = new QWidget(this);
 100     QVBoxLayout *vbox = new QVBoxLayout();
 101     transactionView = new TransactionView(this);
 102     vbox->addWidget(transactionView);
 103     transactionsPage->setLayout(vbox);
 104
 105     addressBookPage = new AddressBookPage(AddressBookPage::ForEditing, AddressBookPage::SendingTab);
 106
 107     receiveCoinsPage = new AddressBookPage(AddressBookPage::ForEditing, AddressBookPage::ReceivingTab);
 108
 109     sendCoinsPage = new SendCoinsDialog(this);
 110
 111     centralWidget = new QStackedWidget(this);
 112     centralWidget->addWidget(overviewPage);
 113     centralWidget->addWidget(transactionsPage);
 114     centralWidget->addWidget(addressBookPage);
 115     centralWidget->addWidget(receiveCoinsPage);
 116     centralWidget->addWidget(sendCoinsPage);
 117     setCentralWidget(centralWidget);
 118
 119     // Create status bar
 120     statusBar();
 121
 122     // Status bar notification icons
 123     QFrame *frameBlocks = new QFrame();
 124     //frameBlocks->setFrameStyle(QFrame::Panel | QFrame::Sunken);
 125     frameBlocks->setContentsMargins(0,0,0,0);
 126     frameBlocks->setMinimumWidth(56);
 127     frameBlocks->setMaximumWidth(56);
 128     QHBoxLayout *frameBlocksLayout = new QHBoxLayout(frameBlocks);
 129     frameBlocksLayout->setContentsMargins(3,0,3,0);
 130     frameBlocksLayout->setSpacing(3);
 131     labelEncryptionIcon = new QLabel();
 132     labelConnectionsIcon = new QLabel();
 133     labelBlocksIcon = new QLabel();
 134     frameBlocksLayout->addStretch();
 135     frameBlocksLayout->addWidget(labelEncryptionIcon);
 136     frameBlocksLayout->addStretch();
 137     frameBlocksLayout->addWidget(labelConnectionsIcon);
 138     frameBlocksLayout->addStretch();
 139     frameBlocksLayout->addWidget(labelBlocksIcon);
 140     frameBlocksLayout->addStretch();
 141
 142     // Progress bar for blocks download
 143     progressBarLabel = new QLabel(tr("Synchronizing with network..."));
 144     progressBarLabel->setVisible(false);
 145     progressBar = new QProgressBar();
 146     progressBar->setToolTip(tr("Block chain synchronization in progress"));
 147     progressBar->setVisible(false);
 148
 149     statusBar()->addWidget(progressBarLabel);
 150     statusBar()->addWidget(progressBar);
 151     statusBar()->addPermanentWidget(frameBlocks);
 152
 153     createTrayIcon();
 154
 155     syncIconMovie = new QMovie(":/movies/update_spinner", "mng", this);
 156
 157     // Clicking on a transaction on the overview page simply sends you to transaction history page
 158     connect(overviewPage, SIGNAL(transactionClicked(QModelIndex)), this, SLOT(gotoHistoryPage()));
 159
 160     // Doubleclicking on a transaction on the transaction history page shows details
 161     connect(transactionView, SIGNAL(doubleClicked(QModelIndex)), transactionView, SLOT(showDetails()));
 162
 163 #ifdef Q_OS_WIN
 164     // Windows-specific customization
 165     if (QtWin::isCompositionEnabled())
 166     {
 167         QtWin::extendFrameIntoClientArea(&window);
 168         window.setContentsMargins(0, 0, 0, 0);
 169     }
 170 #endif
 171     setWindowComposition();
 172
 173     gotoOverviewPage();
 174 }
 175
 176 void BitcoinGUI::createActions()
 177 {
 178     QActionGroup *tabGroup = new QActionGroup(this);
 179
 180     overviewAction = new QAction(QIcon(":/icons/overview"), tr("&Overview"), this);
 181     overviewAction->setToolTip(tr("Show general overview of wallet"));
 182     overviewAction->setCheckable(true);
 183     tabGroup->addAction(overviewAction);
 184
 185     historyAction = new QAction(QIcon(":/icons/history"), tr("&Transactions"), this);
 186     historyAction->setToolTip(tr("Browse transaction history"));
 187     historyAction->setCheckable(true);
 188     tabGroup->addAction(historyAction);
 189
 190     addressBookAction = new QAction(QIcon(":/icons/address-book"), tr("&Address Book"), this);
 191     addressBookAction->setToolTip(tr("Edit the list of stored addresses and labels"));
 192     addressBookAction->setCheckable(true);
 193     tabGroup->addAction(addressBookAction);
 194
 195     receiveCoinsAction = new QAction(QIcon(":/icons/receiving_addresses"), tr("&Receive coins"), this);
 196     receiveCoinsAction->setToolTip(tr("Show the list of addresses for receiving payments"));
 197     receiveCoinsAction->setCheckable(true);
 198     tabGroup->addAction(receiveCoinsAction);
 199
 200     sendCoinsAction = new QAction(QIcon(":/icons/send"), tr("&Send coins"), this);
 201     sendCoinsAction->setToolTip(tr("Send coins to a bitcoin address"));
 202     sendCoinsAction->setCheckable(true);
 203     tabGroup->addAction(sendCoinsAction);
 204
 205     connect(overviewAction, SIGNAL(triggered()), this, SLOT(gotoOverviewPage()));
 206     connect(historyAction, SIGNAL(triggered()), this, SLOT(gotoHistoryPage()));
 207     connect(addressBookAction, SIGNAL(triggered()), this, SLOT(gotoAddressBookPage()));
 208     connect(receiveCoinsAction, SIGNAL(triggered()), this, SLOT(gotoReceiveCoinsPage()));
 209     connect(sendCoinsAction, SIGNAL(triggered()), this, SLOT(gotoSendCoinsPage()));
 210
 211     quitAction = new QAction(QIcon(":/icons/quit"), tr("&Exit"), this);
 212     quitAction->setToolTip(tr("Quit application"));
 213     aboutAction = new QAction(QIcon(":/icons/bitcoin"), tr("&About"), this);
 214     aboutAction->setToolTip(tr("Show information about Bitcoin"));
 215     optionsAction = new QAction(QIcon(":/icons/options"), tr("&Options..."), this);
 216     optionsAction->setToolTip(tr("Modify configuration options for bitcoin"));
 217     openBitcoinAction = new QAction(QIcon(":/icons/bitcoin"), tr("Open &Bitcoin"), this);
 218     openBitcoinAction->setToolTip(tr("Show the Bitcoin window"));
 219     exportAction = new QAction(QIcon(":/icons/export"), tr("&Export..."), this);
 220     exportAction->setToolTip(tr("Export the current view to a file"));
 221     encryptWalletAction = new QAction(QIcon(":/icons/lock_closed"), tr("&Encrypt Wallet"), this);
 222     encryptWalletAction->setToolTip(tr("Encrypt or decrypt wallet"));
 223     encryptWalletAction->setCheckable(true);
 224     changePassphraseAction = new QAction(QIcon(":/icons/key"), tr("&Change Passphrase"), this);
 225     changePassphraseAction->setToolTip(tr("Change the passphrase used for wallet encryption"));
 226
 227     connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
 228     connect(optionsAction, SIGNAL(triggered()), this, SLOT(optionsClicked()));
 229     connect(aboutAction, SIGNAL(triggered()), this, SLOT(aboutClicked()));
 230     connect(openBitcoinAction, SIGNAL(triggered()), this, SLOT(showNormal()));
 231     connect(encryptWalletAction, SIGNAL(triggered(bool)), this, SLOT(encryptWallet(bool)));
 232     connect(changePassphraseAction, SIGNAL(triggered()), this, SLOT(changePassphrase()));
 233 }
 234
 235 void BitcoinGUI::setClientModel(ClientModel *clientModel)
 236 {
 237     this->clientModel = clientModel;
 238
 239     if(clientModel->isTestNet())
 240     {
 241         QString title_testnet = windowTitle() + QString(" ") + tr("[testnet]");
 242         setWindowTitle(title_testnet);
 243         setWindowIcon(QIcon(":icons/bitcoin_testnet"));
 244         if(trayIcon)
 245         {
 246             trayIcon->setToolTip(title_testnet);
 247             trayIcon->setIcon(QIcon(":/icons/toolbar_testnet"));
 248         }
 249     }
 250
 251     // Keep up to date with client
 252     setNumConnections(clientModel->getNumConnections());
 253     connect(clientModel, SIGNAL(numConnectionsChanged(int)), this, SLOT(setNumConnections(int)));
 254
 255     setNumBlocks(clientModel->getNumBlocks());
 256     connect(clientModel, SIGNAL(numBlocksChanged(int)), this, SLOT(setNumBlocks(int)));
 257
 258     // Report errors from network/worker thread
 259     connect(clientModel, SIGNAL(error(QString,QString)), this, SLOT(error(QString,QString)));
 260 }
 261
 262 void BitcoinGUI::setWalletModel(WalletModel *walletModel)
 263 {
 264     this->walletModel = walletModel;
 265
 266     // Report errors from wallet thread
 267     connect(walletModel, SIGNAL(error(QString,QString)), this, SLOT(error(QString,QString)));
 268
 269     // Put transaction list in tabs
 270     transactionView->setModel(walletModel);
 271
 272     overviewPage->setModel(walletModel);
 273     addressBookPage->setModel(walletModel->getAddressTableModel());
 274     receiveCoinsPage->setModel(walletModel->getAddressTableModel());
 275     sendCoinsPage->setModel(walletModel);
 276
 277     setEncryptionStatus(walletModel->getEncryptionStatus());
 278     connect(walletModel, SIGNAL(encryptionStatusChanged(int)), this, SLOT(setEncryptionStatus(int)));
 279
 280     // Balloon popup for new transaction
 281     connect(walletModel->getTransactionTableModel(), SIGNAL(rowsInserted(QModelIndex,int,int)),
 282             this, SLOT(incomingTransaction(QModelIndex,int,int)));
 283
 284     // Ask for passphrase if needed
 285     connect(walletModel, SIGNAL(requireUnlock()), this, SLOT(unlockWallet()));
 286 }
 287
 288 void BitcoinGUI::createTrayIcon()
 289 {
 290     QMenu *trayIconMenu = new QMenu(this);
 291     trayIconMenu->addAction(openBitcoinAction);
 292     trayIconMenu->addAction(optionsAction);
 293     trayIconMenu->addSeparator();
 294     trayIconMenu->addAction(quitAction);
 295
 296     trayIcon = new QSystemTrayIcon(this);
 297     trayIcon->setContextMenu(trayIconMenu);
 298     trayIcon->setToolTip("Bitcoin client");
 299     trayIcon->setIcon(QIcon(":/icons/toolbar"));
 300     connect(trayIcon, SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
 301             this, SLOT(trayIconActivated(QSystemTrayIcon::ActivationReason)));
 302     trayIcon->show();
 303
 304     notificator = new Notificator(tr("bitcoin-qt"), trayIcon);
 305 }
 306
 307 void BitcoinGUI::trayIconActivated(QSystemTrayIcon::ActivationReason reason)
 308 {
 309     if(reason == QSystemTrayIcon::Trigger)
 310     {
 311         // Click on system tray icon triggers "open bitcoin"
 312         openBitcoinAction->trigger();
 313     }
 314
 315 }
 316
 317 void BitcoinGUI::optionsClicked()
 318 {
 319     OptionsDialog dlg;
 320     dlg.setModel(clientModel->getOptionsModel());
 321     dlg.exec();
 322 }
 323
 324 void BitcoinGUI::aboutClicked()
 325 {
 326     AboutDialog dlg;
 327     dlg.setModel(clientModel);
 328     dlg.exec();
 329 }
 330
 331 void BitcoinGUI::setNumConnections(int count)
 332 {
 333     QString icon;
 334     switch(count)
 335     {
 336     case 0: icon = ":/icons/connect_0"; break;
 337     case 1: case 2: case 3: icon = ":/icons/connect_1"; break;
 338     case 4: case 5: case 6: icon = ":/icons/connect_2"; break;
 339     case 7: case 8: case 9: icon = ":/icons/connect_3"; break;
 340     default: icon = ":/icons/connect_4"; break;
 341     }
 342     labelConnectionsIcon->setPixmap(QIcon(icon).pixmap(STATUSBAR_ICONSIZE,STATUSBAR_ICONSIZE));
 343     labelConnectionsIcon->setToolTip(tr("%n active connection(s) to Bitcoin network", "", count));
 344 }
 345
 346 void BitcoinGUI::setNumBlocks(int count)
 347 {
 348     int total = clientModel->getTotalBlocksEstimate();
 349     QString tooltip;
 350
 351     if(count < total)
 352     {
 353         progressBarLabel->setVisible(true);
 354         progressBar->setVisible(true);
 355         progressBar->setMaximum(total);
 356         progressBar->setValue(count);
 357         tooltip = tr("Downloaded %1 of %2 blocks of transaction history.").arg(count).arg(total);
 358     }
 359     else
 360     {
 361         progressBarLabel->setVisible(false);
 362         progressBar->setVisible(false);
 363         tooltip = tr("Downloaded %1 blocks of transaction history.").arg(count);
 364     }
 365
 366     QDateTime now = QDateTime::currentDateTime();
 367     QDateTime lastBlockDate = clientModel->getLastBlockDate();
 368     int secs = lastBlockDate.secsTo(now);
 369     QString text;
 370
 371     // Represent time from last generated block in human readable text
 372     if(secs < 60)
 373     {
 374         text = tr("%n second(s) ago","",secs);
 375     }
 376     else if(secs < 60*60)
 377     {
 378         text = tr("%n minute(s) ago","",secs/60);
 379     }
 380     else if(secs < 24*60*60)
 381     {
 382         text = tr("%n hour(s) ago","",secs/(60*60));
 383     }
 384     else
 385     {
 386         text = tr("%n day(s) ago","",secs/(60*60*24));
 387     }
 388
 389     // Set icon state: spinning if catching up, tick otherwise
 390     if(secs < 30*60)
 391     {
 392         tooltip = tr("Up to date") + QString("\n") + tooltip;
 393         labelBlocksIcon->setPixmap(QIcon(":/icons/synced").pixmap(STATUSBAR_ICONSIZE,STATUSBAR_ICONSIZE));
 394     }
 395     else
 396     {
 397         tooltip = tr("Catching up...") + QString("\n") + tooltip;
 398         labelBlocksIcon->setMovie(syncIconMovie);
 399         syncIconMovie->start();
 400     }
 401
 402     tooltip += QString("\n");
 403     tooltip += tr("Last received block was generated %1.").arg(text);
 404
 405     labelBlocksIcon->setToolTip(tooltip);
 406     progressBarLabel->setToolTip(tooltip);
 407     progressBar->setToolTip(tooltip);
 408 }
 409
 410 void BitcoinGUI::error(const QString &title, const QString &message)
 411 {
 412     // Report errors from network/worker thread
 413     notificator->notify(Notificator::Critical, title, message);
 414 }
 415
 416 void BitcoinGUI::changeEvent(QEvent *e)
 417 {
 418     if (e->type() == QEvent::WindowStateChange)
 419     {
 420         if(clientModel->getOptionsModel()->getMinimizeToTray())
 421         {
 422             if (isMinimized())
 423             {
 424                 hide();
 425                 e->ignore();
 426             }
 427             else
 428             {
 429                 show();
 430                 e->accept();
 431             }
 432         }
 433     }
 434     setWindowComposition();
 435     QMainWindow::changeEvent(e);
 436 }
 437
 438 void BitcoinGUI::closeEvent(QCloseEvent *event)
 439 {
 440     if(!clientModel->getOptionsModel()->getMinimizeToTray() &&
 441        !clientModel->getOptionsModel()->getMinimizeOnClose())
 442     {
 443         qApp->quit();
 444     }
 445     QMainWindow::closeEvent(event);
 446 }
 447
 448 void BitcoinGUI::setWindowComposition()
 449 {
 450 #ifdef Q_OS_WIN
 451     // Make the background transparent on Windows Vista or 7, except when maximized
 452     // Otherwise text becomes hard to read
 453     if (QtWin::isCompositionEnabled())
 454     {
 455         QPalette pal = palette();
 456         QColor bg = pal.window().color();
 457         if(isMaximized())
 458         {
 459             setAttribute(Qt::WA_TranslucentBackground, false);
 460             setAttribute(Qt::WA_StyledBackground, true);
 461             QBrush wb = pal.window();
 462             bg = wb.color();
 463             bg.setAlpha(255);
 464             pal.setColor(QPalette::Window, bg);
 465             setPalette(pal);
 466
 467         }
 468         else
 469         {
 470             setAttribute(Qt::WA_TranslucentBackground);
 471             setAttribute(Qt::WA_StyledBackground, false);
 472             bg.setAlpha(0);
 473             pal.setColor(QPalette::Window, bg);
 474             setPalette(pal);
 475             setAttribute(Qt::WA_NoSystemBackground, false);
 476             ensurePolished();
 477             setAttribute(Qt::WA_StyledBackground, false);
 478         }
 479     }
 480 #endif
 481 }
 482
 483 void BitcoinGUI::askFee(qint64 nFeeRequired, bool *payFee)
 484 {
 485     QString strMessage =
 486         tr("This transaction is over the size limit.  You can still send it for a fee of %1, "
 487           "which goes to the nodes that process your transaction and helps to support the network.  "
 488           "Do you want to pay the fee?").arg(
 489                 BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, nFeeRequired));
 490     QMessageBox::StandardButton retval = QMessageBox::question(
 491           this, tr("Sending..."), strMessage,
 492           QMessageBox::Yes|QMessageBox::Cancel, QMessageBox::Yes);
 493     *payFee = (retval == QMessageBox::Yes);
 494 }
 495
 496 void BitcoinGUI::incomingTransaction(const QModelIndex & parent, int start, int end)
 497 {
 498     TransactionTableModel *ttm = walletModel->getTransactionTableModel();
 499     qint64 amount = ttm->index(start, TransactionTableModel::Amount, parent)
 500                     .data(Qt::EditRole).toULongLong();
 501     if(!clientModel->inInitialBlockDownload())
 502     {
 503         // On new transaction, make an info balloon
 504         // Unless the initial block download is in progress, to prevent balloon-spam
 505         QString date = ttm->index(start, TransactionTableModel::Date, parent)
 506                         .data().toString();
 507         QString type = ttm->index(start, TransactionTableModel::Type, parent)
 508                         .data().toString();
 509         QString address = ttm->index(start, TransactionTableModel::ToAddress, parent)
 510                         .data().toString();
 511         QIcon icon = qvariant_cast<QIcon>(ttm->index(start,
 512                             TransactionTableModel::ToAddress, parent)
 513                         .data(Qt::DecorationRole));
 514
 515         notificator->notify(Notificator::Information,
 516                             (amount)<0 ? tr("Sent transaction") :
 517                                          tr("Incoming transaction"),
 518                               tr("Date: %1\n"
 519                                  "Amount: %2\n"
 520                                  "Type: %3\n"
 521                                  "Address: %4\n")
 522                               .arg(date)
 523                               .arg(BitcoinUnits::formatWithUnit(walletModel->getOptionsModel()->getDisplayUnit(), amount, true))
 524                               .arg(type)
 525                               .arg(address), icon);
 526     }
 527 }
 528
 529 void BitcoinGUI::gotoOverviewPage()
 530 {
 531     overviewAction->setChecked(true);
 532     centralWidget->setCurrentWidget(overviewPage);
 533
 534     exportAction->setEnabled(false);
 535     disconnect(exportAction, SIGNAL(triggered()), 0, 0);
 536 }
 537
 538 void BitcoinGUI::gotoHistoryPage()
 539 {
 540     historyAction->setChecked(true);
 541     centralWidget->setCurrentWidget(transactionsPage);
 542
 543     exportAction->setEnabled(true);
 544     disconnect(exportAction, SIGNAL(triggered()), 0, 0);
 545     connect(exportAction, SIGNAL(triggered()), transactionView, SLOT(exportClicked()));
 546 }
 547
 548 void BitcoinGUI::gotoAddressBookPage()
 549 {
 550     addressBookAction->setChecked(true);
 551     centralWidget->setCurrentWidget(addressBookPage);
 552
 553     exportAction->setEnabled(true);
 554     disconnect(exportAction, SIGNAL(triggered()), 0, 0);
 555     connect(exportAction, SIGNAL(triggered()), addressBookPage, SLOT(exportClicked()));
 556 }
 557
 558 void BitcoinGUI::gotoReceiveCoinsPage()
 559 {
 560     receiveCoinsAction->setChecked(true);
 561     centralWidget->setCurrentWidget(receiveCoinsPage);
 562
 563     exportAction->setEnabled(true);
 564     disconnect(exportAction, SIGNAL(triggered()), 0, 0);
 565     connect(exportAction, SIGNAL(triggered()), receiveCoinsPage, SLOT(exportClicked()));
 566 }
 567
 568 void BitcoinGUI::gotoSendCoinsPage()
 569 {
 570     sendCoinsAction->setChecked(true);
 571     if(centralWidget->currentWidget() != sendCoinsPage)
 572     {
 573         // Clear the current contents if we arrived from another tab
 574         sendCoinsPage->clear();
 575     }
 576     centralWidget->setCurrentWidget(sendCoinsPage);
 577
 578     exportAction->setEnabled(false);
 579     disconnect(exportAction, SIGNAL(triggered()), 0, 0);
 580 }
 581
 582 void BitcoinGUI::dragEnterEvent(QDragEnterEvent *event)
 583 {
 584     // Accept only URLs
 585     if(event->mimeData()->hasUrls())
 586         event->acceptProposedAction();
 587 }
 588
 589 void BitcoinGUI::dropEvent(QDropEvent *event)
 590 {
 591     if(event->mimeData()->hasUrls())
 592     {
 593         gotoSendCoinsPage();
 594         QList<QUrl> urls = event->mimeData()->urls();
 595         foreach(const QUrl &url, urls)
 596         {
 597             sendCoinsPage->handleURL(&url);
 598         }
 599     }
 600
 601     event->acceptProposedAction();
 602 }
 603
 604 void BitcoinGUI::setEncryptionStatus(int status)
 605 {
 606     switch(status)
 607     {
 608     case WalletModel::Unencrypted:
 609         labelEncryptionIcon->hide();
 610         encryptWalletAction->setChecked(false);
 611         changePassphraseAction->setEnabled(false);
 612         encryptWalletAction->setEnabled(true);
 613         break;
 614     case WalletModel::Unlocked:
 615         labelEncryptionIcon->show();
 616         labelEncryptionIcon->setPixmap(QIcon(":/icons/lock_open").pixmap(STATUSBAR_ICONSIZE,STATUSBAR_ICONSIZE));
 617         labelEncryptionIcon->setToolTip(tr("Wallet is <b>encrypted</b> and currently <b>unlocked</b>"));
 618         encryptWalletAction->setChecked(true);
 619         changePassphraseAction->setEnabled(true);
 620         encryptWalletAction->setEnabled(false); // TODO: decrypt currently not supported
 621         break;
 622     case WalletModel::Locked:
 623         labelEncryptionIcon->show();
 624         labelEncryptionIcon->setPixmap(QIcon(":/icons/lock_closed").pixmap(STATUSBAR_ICONSIZE,STATUSBAR_ICONSIZE));
 625         labelEncryptionIcon->setToolTip(tr("Wallet is <b>encrypted</b> and currently <b>locked</b>"));
 626         encryptWalletAction->setChecked(true);
 627         changePassphraseAction->setEnabled(true);
 628         encryptWalletAction->setEnabled(false); // TODO: decrypt currently not supported
 629         break;
 630     }
 631 }
 632
 633 void BitcoinGUI::encryptWallet(bool status)
 634 {
 635     AskPassphraseDialog dlg(status ? AskPassphraseDialog::Encrypt:
 636                                      AskPassphraseDialog::Decrypt, this);
 637     dlg.setModel(walletModel);
 638     dlg.exec();
 639
 640     setEncryptionStatus(walletModel->getEncryptionStatus());
 641 }
 642
 643 void BitcoinGUI::changePassphrase()
 644 {
 645     AskPassphraseDialog dlg(AskPassphraseDialog::ChangePass, this);
 646     dlg.setModel(walletModel);
 647     dlg.exec();
 648 }
 649
 650 void BitcoinGUI::unlockWallet()
 651 {
 652     // Unlock wallet when requested by wallet model
 653     if(walletModel->getEncryptionStatus() == WalletModel::Locked)
 654     {
 655         AskPassphraseDialog dlg(AskPassphraseDialog::Unlock, this);
 656         dlg.setModel(walletModel);
 657         dlg.exec();
 658     }
 659 }