QtUI code cleanup / comment improvements

16 files changed, 109 insertions, 151 deletions

diff --git a/src/qt/addresstablemodel.cpp b/src/qt/addresstablemodel.cpp
index c8329bb2fd..bd314ba0f0 100644
--- a/src/qt/addresstablemodel.cpp
+++ b/src/qt/addresstablemodel.cpp
@@ -161,13 +161,13 @@ bool AddressTableModel::setData(const QModelIndex & index, const QVariant & valu
             rec->label = value.toString();
             break;
         case Address:
-            // Refuse to set invalid address
+            // Refuse to set invalid address, set error status and return false
             if(!walletModel->validateAddress(value.toString()))
             {
                 editStatus = INVALID_ADDRESS;
                 return false;
             }
-            // Double-check that we're not overwriting receiving address
+            // Double-check that we're not overwriting a receiving address
             if(rec->type == AddressTableEntry::Sending)
             {
                 CRITICAL_BLOCK(wallet->cs_mapAddressBook)
@@ -234,7 +234,7 @@ QModelIndex AddressTableModel::index(int row, int column, const QModelIndex & pa
 
 void AddressTableModel::updateList()
 {
-    // Update internal model from Bitcoin core
+    // Update address book model from Bitcoin core
     beginResetModel();
     priv->refreshAddressTable();
     endResetModel();
@@ -247,7 +247,6 @@ QString AddressTableModel::addRow(const QString &type, const QString &label, con
 
     editStatus = OK;
 
-
     if(type == Send)
     {
         if(!walletModel->validateAddress(address))
@@ -255,7 +254,7 @@ QString AddressTableModel::addRow(const QString &type, const QString &label, con
             editStatus = INVALID_ADDRESS;
             return QString();
         }
-        // Check for duplicate
+        // Check for duplicate addresses
         CRITICAL_BLOCK(wallet->cs_mapAddressBook)
         {
             if(wallet->mapAddressBook.count(strAddress))
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index a21983b7e3..cdd69e31a5 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -135,7 +135,7 @@ int main(int argc, char *argv[])
         {
             {
                 // Put this in a block, so that BitcoinGUI is cleaned up properly before
-                // calling shutdown.
+                // calling Shutdown().
                 BitcoinGUI window;
                 splash.finish(&window);
                 OptionsModel optionsModel(pwalletMain);
diff --git a/src/qt/bitcoinamountfield.cpp b/src/qt/bitcoinamountfield.cpp
index 1af582f6cc..ea38cc86dd 100644
--- a/src/qt/bitcoinamountfield.cpp
+++ b/src/qt/bitcoinamountfield.cpp
@@ -44,7 +44,7 @@ BitcoinAmountField::BitcoinAmountField(QWidget *parent):
     connect(decimals, SIGNAL(textChanged(QString)), this, SIGNAL(textChanged()));
     connect(unit, SIGNAL(currentIndexChanged(int)), this, SLOT(unitChanged(int)));
 
-    // TODO: set default based on configuration
+    // Set default based on configuration
     unitChanged(unit->currentIndex());
 }
 
@@ -67,7 +67,6 @@ void BitcoinAmountField::clear()
 {
     amount->clear();
     decimals->clear();
-    // TODO: set default based on configuration
     unit->setCurrentIndex(0);
 }
 
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index 2c9c25d5b5..dd94652e3a 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -52,6 +52,8 @@ BitcoinGUI::BitcoinGUI(QWidget *parent):
     resize(850, 550);
     setWindowTitle(tr("Bitcoin Wallet"));
     setWindowIcon(QIcon(":icons/bitcoin"));
+    // Accept D&D of URIs
+    setAcceptDrops(true);
 
     createActions();
 
@@ -68,8 +70,8 @@ BitcoinGUI::BitcoinGUI(QWidget *parent):
     QMenu *help = menuBar()->addMenu("&Help");
     help->addAction(aboutAction);
     
-    // Toolbar
-    QToolBar *toolbar = addToolBar("Main toolbar");
+    // Toolbars
+    QToolBar *toolbar = addToolBar(tr("Tabs toolbar"));
     toolbar->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
     toolbar->addAction(overviewAction);
     toolbar->addAction(sendCoinsAction);
@@ -77,19 +79,17 @@ BitcoinGUI::BitcoinGUI(QWidget *parent):
     toolbar->addAction(historyAction);
     toolbar->addAction(addressBookAction);
 
-    QToolBar *toolbar2 = addToolBar("Transactions toolbar");
+    QToolBar *toolbar2 = addToolBar(tr("Actions toolbar"));
     toolbar2->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
     toolbar2->addAction(exportAction);
 
-    // Overview page
+    // Create tabs
     overviewPage = new OverviewPage();
-    QVBoxLayout *vbox = new QVBoxLayout();
 
+    transactionsPage = new QWidget(this);
+    QVBoxLayout *vbox = new QVBoxLayout();
     transactionView = new TransactionView(this);
-    connect(transactionView, SIGNAL(doubleClicked(QModelIndex)), transactionView, SLOT(showDetails()));
     vbox->addWidget(transactionView);
-
-    transactionsPage = new QWidget(this);
     transactionsPage->setLayout(vbox);
 
     addressBookPage = new AddressBookPage(AddressBookPage::ForEditing, AddressBookPage::SendingTab);
@@ -109,7 +109,7 @@ BitcoinGUI::BitcoinGUI(QWidget *parent):
     // Create status bar
     statusBar();
 
-    // Status bar "Blocks" notification
+    // Status bar notification icons
     QFrame *frameBlocks = new QFrame();
     //frameBlocks->setFrameStyle(QFrame::Panel | QFrame::Sunken);
     frameBlocks->setContentsMargins(0,0,0,0);
@@ -141,10 +141,11 @@ BitcoinGUI::BitcoinGUI(QWidget *parent):
 
     syncIconMovie = new QMovie(":/movies/update_spinner", "mng", this);
 
-    // Clicking on a transaction simply sends you to transaction history page
+    // Clicking on a transaction on the overview page simply sends you to transaction history page
     connect(overviewPage, SIGNAL(transactionClicked(QModelIndex)), this, SLOT(gotoHistoryPage()));
 
-    setAcceptDrops(true);
+    // Doubleclicking on a transaction on the transaction history page shows details
+    connect(transactionView, SIGNAL(doubleClicked(QModelIndex)), transactionView, SLOT(showDetails()));
 
     gotoOverviewPage();
 }
@@ -252,7 +253,6 @@ void BitcoinGUI::createTrayIcon()
 {
     QMenu *trayIconMenu = new QMenu(this);
     trayIconMenu->addAction(openBitcoinAction);
-    trayIconMenu->addAction(sendCoinsAction);
     trayIconMenu->addAction(optionsAction);
     trayIconMenu->addSeparator();
     trayIconMenu->addAction(quitAction);
@@ -268,7 +268,7 @@ void BitcoinGUI::createTrayIcon()
 
 void BitcoinGUI::trayIconActivated(QSystemTrayIcon::ActivationReason reason)
 {
-    if(reason == QSystemTrayIcon::DoubleClick)
+    if(reason == QSystemTrayIcon::Trigger)
     {
         // Doubleclick on system tray icon triggers "open bitcoin"
         openBitcoinAction->trigger();
@@ -347,31 +347,22 @@ void BitcoinGUI::setNumBlocks(int count)
         text = tr("%n day(s) ago","",secs/(60*60*24));
     }
 
-    // In the label we want to be less specific
-    bool spinning = true;
+    // Set icon state: spinning if catching up, tick otherwise
     if(secs < 30*60)
     {
         tooltip = tr("Up to date") + QString("\n") + tooltip;
-        spinning = false;
+        labelBlocksIcon->setPixmap(QIcon(":/icons/synced").pixmap(16,16));
     }
     else
     {
         tooltip = tr("Catching up...") + QString("\n") + tooltip;
+        labelBlocksIcon->setMovie(syncIconMovie);
+        syncIconMovie->start();
     }
 
     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));
-    }
-
     labelBlocksIcon->setToolTip(tooltip);
     progressBarLabel->setToolTip(tooltip);
     progressBar->setToolTip(tooltip);
@@ -439,12 +430,14 @@ void BitcoinGUI::askFee(qint64 nFeeRequired, bool *payFee)
 
 void BitcoinGUI::incomingTransaction(const QModelIndex & parent, int start, int end)
 {
+    if(start == end)
+        return;
     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
+        // 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();
diff --git a/src/qt/bitcoinunits.h b/src/qt/bitcoinunits.h
index 4dfdbea044..a7bebbc3e4 100644
--- a/src/qt/bitcoinunits.h
+++ b/src/qt/bitcoinunits.h
@@ -4,7 +4,8 @@
 #include <QString>
 #include <QAbstractListModel>
 
-// Bitcoin unit definitions
+// Bitcoin unit definitions, encapsulates parsing and formatting
+// and serves as list model for dropdown selection boxes.
 class BitcoinUnits: public QAbstractListModel
 {
 public:
diff --git a/src/qt/clientmodel.h b/src/qt/clientmodel.h
index 845ad10dec..15387056c8 100644
--- a/src/qt/clientmodel.h
+++ b/src/qt/clientmodel.h
@@ -12,7 +12,7 @@ QT_BEGIN_NAMESPACE
 class QDateTime;
 QT_END_NAMESPACE
 
-// Interface to Bitcoin network client
+// Model for Bitcoin network client
 class ClientModel : public QObject
 {
     Q_OBJECT
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index 74863e1533..158b84a285 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -12,12 +12,12 @@
 #include <QLineEdit>
 #include <QUrl>
 
-QString GUIUtil::DateTimeStr(qint64 nTime)
+QString GUIUtil::dateTimeStr(qint64 nTime)
 {
-    return DateTimeStr(QDateTime::fromTime_t((qint32)nTime));
+    return dateTimeStr(QDateTime::fromTime_t((qint32)nTime));
 }
 
-QString GUIUtil::DateTimeStr(const QDateTime &date)
+QString GUIUtil::dateTimeStr(const QDateTime &date)
 {
     return date.date().toString(Qt::SystemLocaleShortDate) + QString(" ") + date.toString("hh:mm");
 }
@@ -61,8 +61,6 @@ bool GUIUtil::parseBitcoinURL(const QUrl *url, SendCoinsRecipient *out)
     }
     else // Amount is non-empty
     {
-        // TODO: support <n>X<nexp> (exp = 8-nexp) (https://en.bitcoin.it/wiki/URI_Scheme)
-        // TODO: support <n>E<exp>
         if(!BitcoinUnits::parse(BitcoinUnits::BTC, amount, &rv.amount))
         {
             return false;
diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
index 5f63c16e14..bc4ddb8aae 100644
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -16,8 +16,8 @@ class GUIUtil
 {
 public:
     // Create human-readable string from date
-    static QString DateTimeStr(qint64 nTime);
-    static QString DateTimeStr(const QDateTime &datetime);
+    static QString dateTimeStr(qint64 nTime);
+    static QString dateTimeStr(const QDateTime &datetime);
 
     // Render bitcoin addresses in monospace font
     static QFont bitcoinAddressFont();
diff --git a/src/qt/overviewpage.cpp b/src/qt/overviewpage.cpp
index e8180e0453..7bade9a755 100644
--- a/src/qt/overviewpage.cpp
+++ b/src/qt/overviewpage.cpp
@@ -74,7 +74,7 @@ public:
         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->drawText(amountRect, Qt::AlignLeft|Qt::AlignVCenter, GUIUtil::dateTimeStr(date));
 
         painter->restore();
     }
diff --git a/src/qt/transactiondesc.cpp b/src/qt/transactiondesc.cpp
index 88dc2d8d67..612b5d8974 100644
--- a/src/qt/transactiondesc.cpp
+++ b/src/qt/transactiondesc.cpp
@@ -1,79 +1,55 @@
 #include <transactiondesc.h>
 
 #include "guiutil.h"
+#include "bitcoinunits.h"
 
 #include "headers.h"
 #include "qtui.h"
 
 #include <QString>
-
-// Taken straight from ui.cpp
-// TODO: Convert to use QStrings, Qt::Escape and tr()
-//   or: refactor and put describeAsHTML() into bitcoin core but that is unneccesary with better
-//       UI<->core API, no need to put display logic in core.
+#include <QTextDocument> // For Qt::escape
 
 using namespace std;
 
-static string HtmlEscape(const char* psz, bool fMultiLine=false)
+QString TransactionDesc::HtmlEscape(const QString& str, bool fMultiLine)
 {
-    int len = 0;
-    for (const char* p = psz; *p; p++)
+    QString escaped = Qt::escape(str);
+    if(fMultiLine)
     {
-             if (*p == '<') len += 4;
-        else if (*p == '>') len += 4;
-        else if (*p == '&') len += 5;
-        else if (*p == '"') len += 6;
-        else if (*p == ' ' && p > psz && p[-1] == ' ' && p[1] == ' ') len += 6;
-        else if (*p == '\n' && fMultiLine) len += 5;
-        else
-            len++;
+        escaped = escaped.replace("\n", "<br>\n");
     }
-    string str;
-    str.reserve(len);
-    for (const char* p = psz; *p; p++)
-    {
-             if (*p == '<') str += "&lt;";
-        else if (*p == '>') str += "&gt;";
-        else if (*p == '&') str += "&amp;";
-        else if (*p == '"') str += "&quot;";
-        else if (*p == ' ' && p > psz && p[-1] == ' ' && p[1] == ' ') str += "&nbsp;";
-        else if (*p == '\n' && fMultiLine) str += "<br>\n";
-        else
-            str += *p;
-    }
-    return str;
+    return escaped;
 }
 
-static string HtmlEscape(const string& str, bool fMultiLine=false)
+QString TransactionDesc::HtmlEscape(const std::string& str, bool fMultiLine)
 {
-    return HtmlEscape(str.c_str(), fMultiLine);
+    return HtmlEscape(QString::fromStdString(str), fMultiLine);
 }
 
-static string FormatTxStatus(const CWalletTx& wtx)
+QString TransactionDesc::FormatTxStatus(const CWalletTx& wtx)
 {
-    // Status
     if (!wtx.IsFinal())
     {
-        if (wtx.nLockTime < 500000000)
-            return strprintf(_("Open for %d blocks"), nBestHeight - wtx.nLockTime);
+        if (wtx.nLockTime < LOCKTIME_THRESHOLD)
+            return tr("Open for %1 blocks").arg(nBestHeight - wtx.nLockTime);
         else
-            return strprintf(_("Open until %s"), GUIUtil::DateTimeStr(wtx.nLockTime).toStdString().c_str());
+            return tr("Open until %1").arg(GUIUtil::dateTimeStr(wtx.nLockTime));
     }
     else
     {
         int nDepth = wtx.GetDepthInMainChain();
         if (GetAdjustedTime() - wtx.nTimeReceived > 2 * 60 && wtx.GetRequestCount() == 0)
-            return strprintf(_("%d/offline?"), nDepth);
+            return tr("%1/offline?").arg(nDepth);
         else if (nDepth < 6)
-            return strprintf(_("%d/unconfirmed"), nDepth);
+            return tr("%1/unconfirmed").arg(nDepth);
         else
-            return strprintf(_("%d confirmations"), nDepth);
+            return tr("%1 confirmations").arg(nDepth);
     }
 }
 
-string TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
+QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
 {
-    string strHTML;
+    QString strHTML;
     CRITICAL_BLOCK(wallet->cs_mapAddressBook)
     {
         strHTML.reserve(4000);
@@ -84,36 +60,33 @@ string TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
         int64 nDebit = wtx.GetDebit();
         int64 nNet = nCredit - nDebit;
 
-
-
-        strHTML += _("<b>Status:</b> ") + FormatTxStatus(wtx);
+        strHTML += tr("<b>Status:</b> ") + FormatTxStatus(wtx);
         int nRequests = wtx.GetRequestCount();
         if (nRequests != -1)
         {
             if (nRequests == 0)
-                strHTML += _(", has not been successfully broadcast yet");
+                strHTML += tr(", has not been successfully broadcast yet");
             else if (nRequests == 1)
-                strHTML += strprintf(_(", broadcast through %d node"), nRequests);
+                strHTML += tr(", broadcast through %1 node").arg(nRequests);
             else
-                strHTML += strprintf(_(", broadcast through %d nodes"), nRequests);
+                strHTML += tr(", broadcast through %1 nodes").arg(nRequests);
         }
         strHTML += "<br>";
 
-        strHTML += _("<b>Date:</b> ") + (nTime ? GUIUtil::DateTimeStr(nTime).toStdString() : "") + "<br>";
-
+        strHTML += tr("<b>Date:</b> ") + (nTime ? GUIUtil::dateTimeStr(nTime) : QString("")) + "<br>";
 
         //
         // From
         //
         if (wtx.IsCoinBase())
         {
-            strHTML += _("<b>Source:</b> Generated<br>");
+            strHTML += tr("<b>Source:</b> Generated<br>");
         }
         else if (!wtx.mapValue["from"].empty())
         {
             // Online transaction
             if (!wtx.mapValue["from"].empty())
-                strHTML += _("<b>From:</b> ") + HtmlEscape(wtx.mapValue["from"]) + "<br>";
+                strHTML += tr("<b>From:</b> ") + HtmlEscape(wtx.mapValue["from"]) + "<br>";
         }
         else
         {
@@ -130,13 +103,13 @@ string TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
                         {
                             if (wallet->mapAddressBook.count(address))
                             {
-                                strHTML += string() + _("<b>From:</b> ") + _("unknown") + "<br>";
-                                strHTML += _("<b>To:</b> ");
+                                strHTML += tr("<b>From:</b> ") + tr("unknown") + "<br>";
+                                strHTML += tr("<b>To:</b> ");
                                 strHTML += HtmlEscape(address.ToString());
                                 if (!wallet->mapAddressBook[address].empty())
-                                    strHTML += _(" (yours, label: ") + HtmlEscape(wallet->mapAddressBook[address]) + ")";
+                                    strHTML += tr(" (yours, label: ") + HtmlEscape(wallet->mapAddressBook[address]) + ")";
                                 else
-                                    strHTML += _(" (yours)");
+                                    strHTML += tr(" (yours)");
                                 strHTML += "<br>";
                             }
                         }
@@ -146,7 +119,6 @@ string TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
             }
         }
 
-
         //
         // To
         //
@@ -155,13 +127,12 @@ string TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
         {
             // Online transaction
             strAddress = wtx.mapValue["to"];
-            strHTML += _("<b>To:</b> ");
+            strHTML += tr("<b>To:</b> ");
             if (wallet->mapAddressBook.count(strAddress) && !wallet->mapAddressBook[strAddress].empty())
                 strHTML += HtmlEscape(wallet->mapAddressBook[strAddress]) + " ";
             strHTML += HtmlEscape(strAddress) + "<br>";
         }
 
-
         //
         // Amount
         //
@@ -173,11 +144,13 @@ string TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
             int64 nUnmatured = 0;
             BOOST_FOREACH(const CTxOut& txout, wtx.vout)
                 nUnmatured += wallet->GetCredit(txout);
-            strHTML += _("<b>Credit:</b> ");
+            strHTML += tr("<b>Credit:</b> ");
             if (wtx.IsInMainChain())
-                strHTML += strprintf(_("(%s matures in %d more blocks)"), FormatMoney(nUnmatured).c_str(), wtx.GetBlocksToMaturity());
+                strHTML += tr("(%1 matures in %2 more blocks)")
+                        .arg(BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, nUnmatured))
+                        .arg(wtx.GetBlocksToMaturity());
             else
-                strHTML += _("(not accepted)");
+                strHTML += tr("(not accepted)");
             strHTML += "<br>";
         }
         else if (nNet > 0)
@@ -185,7 +158,7 @@ string TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
             //
             // Credit
             //
-            strHTML += _("<b>Credit:</b> ") + FormatMoney(nNet) + "<br>";
+            strHTML += tr("<b>Credit:</b> ") + BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, nNet) + "<br>";
         }
         else
         {
@@ -213,7 +186,7 @@ string TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
                         CBitcoinAddress address;
                         if (ExtractAddress(txout.scriptPubKey, 0, address))
                         {
-                            strHTML += _("<b>To:</b> ");
+                            strHTML += tr("<b>To:</b> ");
                             if (wallet->mapAddressBook.count(address) && !wallet->mapAddressBook[address].empty())
                                 strHTML += HtmlEscape(wallet->mapAddressBook[address]) + " ";
                             strHTML += HtmlEscape(address.ToString());
@@ -221,7 +194,7 @@ string TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
                         }
                     }
 
-                    strHTML += _("<b>Debit:</b> ") + FormatMoney(-txout.nValue) + "<br>";
+                    strHTML += tr("<b>Debit:</b> ") + BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, -txout.nValue) + "<br>";
                 }
 
                 if (fAllToMe)
@@ -229,13 +202,13 @@ string TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
                     // Payment to self
                     int64 nChange = wtx.GetChange();
                     int64 nValue = nCredit - nChange;
-                    strHTML += _("<b>Debit:</b> ") + FormatMoney(-nValue) + "<br>";
-                    strHTML += _("<b>Credit:</b> ") + FormatMoney(nValue) + "<br>";
+                    strHTML += tr("<b>Debit:</b> ") + BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, -nValue) + "<br>";
+                    strHTML += tr("<b>Credit:</b> ") + BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, nValue) + "<br>";
                 }
 
                 int64 nTxFee = nDebit - wtx.GetValueOut();
                 if (nTxFee > 0)
-                    strHTML += _("<b>Transaction fee:</b> ") + FormatMoney(-nTxFee) + "<br>";
+                    strHTML += tr("<b>Transaction fee:</b> ") + BitcoinUnits::formatWithUnit(BitcoinUnits::BTC,-nTxFee) + "<br>";
             }
             else
             {
@@ -244,27 +217,25 @@ string TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
                 //
                 BOOST_FOREACH(const CTxIn& txin, wtx.vin)
                     if (wallet->IsMine(txin))
-                        strHTML += _("<b>Debit:</b> ") + FormatMoney(-wallet->GetDebit(txin)) + "<br>";
+                        strHTML += tr("<b>Debit:</b> ") + BitcoinUnits::formatWithUnit(BitcoinUnits::BTC,-wallet->GetDebit(txin)) + "<br>";
                 BOOST_FOREACH(const CTxOut& txout, wtx.vout)
                     if (wallet->IsMine(txout))
-                        strHTML += _("<b>Credit:</b> ") + FormatMoney(wallet->GetCredit(txout)) + "<br>";
+                        strHTML += tr("<b>Credit:</b> ") + BitcoinUnits::formatWithUnit(BitcoinUnits::BTC,wallet->GetCredit(txout)) + "<br>";
             }
         }
 
-        strHTML += _("<b>Net amount:</b> ") + FormatMoney(nNet, true) + "<br>";
-
+        strHTML += tr("<b>Net amount:</b> ") + BitcoinUnits::formatWithUnit(BitcoinUnits::BTC,nNet, true) + "<br>";
 
         //
         // Message
         //
         if (!wtx.mapValue["message"].empty())
-            strHTML += string() + "<br><b>" + _("Message:") + "</b><br>" + HtmlEscape(wtx.mapValue["message"], true) + "<br>";
+            strHTML += QString("<br><b>") + tr("Message:") + "</b><br>" + HtmlEscape(wtx.mapValue["message"], true) + "<br>";
         if (!wtx.mapValue["comment"].empty())
-            strHTML += string() + "<br><b>" + _("Comment:") + "</b><br>" + HtmlEscape(wtx.mapValue["comment"], true) + "<br>";
+            strHTML += QString("<br><b>") + tr("Comment:") + "</b><br>" + HtmlEscape(wtx.mapValue["comment"], true) + "<br>";
 
         if (wtx.IsCoinBase())
-            strHTML += string() + "<br>" + _("Generated coins must wait 120 blocks before they can be spent.  When you generated this block, it was broadcast to the network to be added to the block chain.  If it fails to get into the chain, it will change to \"not accepted\" and not be spendable.  This may occasionally happen if another node generates a block within a few seconds of yours.") + "<br>";
-
+            strHTML += QString("<br>") + tr("Generated coins must wait 120 blocks before they can be spent.  When you generated this block, it was broadcast to the network to be added to the block chain.  If it fails to get into the chain, it will change to \"not accepted\" and not be spendable.  This may occasionally happen if another node generates a block within a few seconds of yours.") + "<br>";
 
         //
         // Debug view
@@ -274,10 +245,10 @@ string TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
             strHTML += "<hr><br>Debug information<br><br>";
             BOOST_FOREACH(const CTxIn& txin, wtx.vin)
                 if(wallet->IsMine(txin))
-                    strHTML += "<b>Debit:</b> " + FormatMoney(-wallet->GetDebit(txin)) + "<br>";
+                    strHTML += "<b>Debit:</b> " + BitcoinUnits::formatWithUnit(BitcoinUnits::BTC,-wallet->GetDebit(txin)) + "<br>";
             BOOST_FOREACH(const CTxOut& txout, wtx.vout)
                 if(wallet->IsMine(txout))
-                    strHTML += "<b>Credit:</b> " + FormatMoney(wallet->GetCredit(txout)) + "<br>";
+                    strHTML += "<b>Credit:</b> " + BitcoinUnits::formatWithUnit(BitcoinUnits::BTC,wallet->GetCredit(txout)) + "<br>";
 
             strHTML += "<br><b>Transaction:</b><br>";
             strHTML += HtmlEscape(wtx.ToString(), true);
@@ -304,9 +275,9 @@ string TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
                             {
                                 if (wallet->mapAddressBook.count(address) && !wallet->mapAddressBook[address].empty())
                                     strHTML += HtmlEscape(wallet->mapAddressBook[address]) + " ";
-                                strHTML += address.ToString();
+                                strHTML += QString::fromStdString(address.ToString());
                             }
-                            strHTML = strHTML + " Amount=" + FormatMoney(vout.nValue);
+                            strHTML = strHTML + " Amount=" + BitcoinUnits::formatWithUnit(BitcoinUnits::BTC,vout.nValue);
                             strHTML = strHTML + " IsMine=" + (wallet->IsMine(vout) ? "true" : "false") + "</li>";
                         }
                     }
@@ -315,8 +286,6 @@ string TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx)
             strHTML += "</ul>";
         }
 
-
-
         strHTML += "</font></html>";
     }
     return strHTML;
diff --git a/src/qt/transactiondesc.h b/src/qt/transactiondesc.h
index fde861b6fb..257b2cbb89 100644
--- a/src/qt/transactiondesc.h
+++ b/src/qt/transactiondesc.h
@@ -1,16 +1,24 @@
 #ifndef TRANSACTIONDESC_H
 #define TRANSACTIONDESC_H
 
+#include <QString>
+#include <QObject>
 #include <string>
 
 class CWallet;
 class CWalletTx;
 
-class TransactionDesc
+class TransactionDesc: public QObject
 {
 public:
-    /* Provide human-readable extended HTML description of a transaction */
-    static std::string toHTML(CWallet *wallet, CWalletTx &wtx);
+    // Provide human-readable extended HTML description of a transaction
+    static QString toHTML(CWallet *wallet, CWalletTx &wtx);
+private:
+    TransactionDesc() {}
+
+    static QString HtmlEscape(const QString& str, bool fMultiLine=false);
+    static QString HtmlEscape(const std::string &str, bool fMultiLine=false);
+    static QString FormatTxStatus(const CWalletTx& wtx);
 };
 
 #endif // TRANSACTIONDESC_H
diff --git a/src/qt/transactiontablemodel.cpp b/src/qt/transactiontablemodel.cpp
index 6343fe50ec..353cd79145 100644
--- a/src/qt/transactiontablemodel.cpp
+++ b/src/qt/transactiontablemodel.cpp
@@ -18,7 +18,7 @@
 #include <QDateTime>
 #include <QtAlgorithms>
 
-// Credit and Debit columns are right-aligned as they contain numbers
+// Amount column is right-aligned it contains numbers
 static int column_alignments[] = {
         Qt::AlignLeft|Qt::AlignVCenter,
         Qt::AlignLeft|Qt::AlignVCenter,
@@ -100,10 +100,10 @@ struct TransactionTablePriv
             for(int update_idx = updated_sorted.size()-1; update_idx >= 0; --update_idx)
             {
                 const uint256 &hash = updated_sorted.at(update_idx);
-                /* Find transaction in wallet */
+                // Find transaction in wallet
                 std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(hash);
                 bool inWallet = mi != wallet->mapWallet.end();
-                /* Find bounds of this transaction in model */
+                // Find bounds of this transaction in model
                 QList<TransactionRecord>::iterator lower = qLowerBound(
                     cachedWallet.begin(), cachedWallet.end(), hash, TxLessThan());
                 QList<TransactionRecord>::iterator upper = qUpperBound(
@@ -196,7 +196,7 @@ struct TransactionTablePriv
             std::map<uint256, CWalletTx>::iterator mi = wallet->mapWallet.find(rec->hash);
             if(mi != wallet->mapWallet.end())
             {
-                return QString::fromStdString(TransactionDesc::toHTML(wallet, mi->second));
+                return TransactionDesc::toHTML(wallet, mi->second);
             }
         }
         return QString("");
@@ -274,7 +274,7 @@ QString TransactionTableModel::formatTxStatus(const TransactionRecord *wtx) cons
         status = tr("Open for %n block(s)","",wtx->status.open_for);
         break;
     case TransactionStatus::OpenUntilDate:
-        status = tr("Open until %1").arg(GUIUtil::DateTimeStr(wtx->status.open_for));
+        status = tr("Open until %1").arg(GUIUtil::dateTimeStr(wtx->status.open_for));
         break;
     case TransactionStatus::Offline:
         status = tr("Offline (%1 confirmations)").arg(wtx->status.depth);
@@ -313,7 +313,7 @@ QString TransactionTableModel::formatTxDate(const TransactionRecord *wtx) const
 {
     if(wtx->time)
     {
-        return GUIUtil::DateTimeStr(wtx->time);
+        return GUIUtil::dateTimeStr(wtx->time);
     }
     else
     {
@@ -606,11 +606,6 @@ QVariant TransactionTableModel::headerData(int section, Qt::Orientation orientat
     return QVariant();
 }
 
-Qt::ItemFlags TransactionTableModel::flags(const QModelIndex &index) const
-{
-    return QAbstractTableModel::flags(index);
-}
-
 QModelIndex TransactionTableModel::index(int row, int column, const QModelIndex &parent) const
 {
     Q_UNUSED(parent);
diff --git a/src/qt/transactiontablemodel.h b/src/qt/transactiontablemodel.h
index 17bfeccdb2..da55495e1e 100644
--- a/src/qt/transactiontablemodel.h
+++ b/src/qt/transactiontablemodel.h
@@ -51,7 +51,6 @@ public:
     int columnCount(const QModelIndex &parent) const;
     QVariant data(const QModelIndex &index, int role) const;
     QVariant headerData(int section, Qt::Orientation orientation, int role) const;
-    Qt::ItemFlags flags(const QModelIndex &index) const;
     QModelIndex index(int row, int column, const QModelIndex & parent = QModelIndex()) const;
 private:
     CWallet* wallet;
diff --git a/src/qt/transactionview.h b/src/qt/transactionview.h
index 54925f2855..f4f815b162 100644
--- a/src/qt/transactionview.h
+++ b/src/qt/transactionview.h
@@ -24,6 +24,7 @@ public:
 
     void setModel(WalletModel *model);
 
+    // Date ranges for filter
     enum DateEnum
     {
         All,
diff --git a/src/qt/walletmodel.cpp b/src/qt/walletmodel.cpp
index d8139e9f09..10b3738c67 100644
--- a/src/qt/walletmodel.cpp
+++ b/src/qt/walletmodel.cpp
@@ -83,8 +83,6 @@ WalletModel::SendCoinsReturn WalletModel::sendCoins(const QList<SendCoinsRecipie
     // Pre-check input data for validity
     foreach(const SendCoinsRecipient &rcp, recipients)
     {
-        uint160 hash160 = 0;
-
         if(!validateAddress(rcp.address))
         {
             return InvalidAddress;
diff --git a/src/qt/walletmodel.h b/src/qt/walletmodel.h
index c989e7fbbe..bb1c6e85d3 100644
--- a/src/qt/walletmodel.h
+++ b/src/qt/walletmodel.h
@@ -15,7 +15,7 @@ struct SendCoinsRecipient
     qint64 amount;
 };
 
-// Interface to a Bitcoin wallet
+// Interface to Bitcoin wallet from Qt view code
 class WalletModel : public QObject
 {
     Q_OBJECT
@@ -47,9 +47,7 @@ public:
     // Check address for validity
     bool validateAddress(const QString &address);
 
-    // Return status record for SendCoins
-    // fee is used in case status is "AmountWithFeeExceedsBalance"
-    // hex is filled with the transaction hash if status is "OK"
+    // Return status record for SendCoins, contains error id + information
     struct SendCoinsReturn
     {
         SendCoinsReturn(StatusCode status,
@@ -57,11 +55,11 @@ public:
                          QString hex=QString()):
             status(status), fee(fee), hex(hex) {}
         StatusCode status;
-        qint64 fee;
-        QString hex;
+        qint64 fee; // is used in case status is "AmountWithFeeExceedsBalance"
+        QString hex; // is filled with the transaction hash if status is "OK"
     };
 
-    // Send coins to list of recipients
+    // Send coins to a list of recipients
     SendCoinsReturn sendCoins(const QList<SendCoinsRecipient> &recipients);
 private:
     CWallet *wallet;