Merge pull request #634 from laanwj/doxygen

Add doxygen documentation

29 files changed, 221 insertions, 134 deletions

diff --git a/src/qt/aboutdialog.h b/src/qt/aboutdialog.h
index d2caa3eedf..2ed9e9e7c4 100644
--- a/src/qt/aboutdialog.h
+++ b/src/qt/aboutdialog.h
@@ -8,6 +8,7 @@ namespace Ui {
 }
 class ClientModel;
 
+/** "About" dialog box */
 class AboutDialog : public QDialog
 {
     Q_OBJECT
diff --git a/src/qt/addressbookpage.h b/src/qt/addressbookpage.h
index ef64d17539..1a97f3d602 100644
--- a/src/qt/addressbookpage.h
+++ b/src/qt/addressbookpage.h
@@ -14,6 +14,8 @@ class QItemSelection;
 class QSortFilterProxyModel;
 QT_END_NAMESPACE
 
+/** Widget that shows a list of sending or receiving addresses.
+  */
 class AddressBookPage : public QDialog
 {
     Q_OBJECT
@@ -25,8 +27,8 @@ public:
     };
 
     enum Mode {
-        ForSending, // Pick address for sending
-        ForEditing  // Open address book for editing
+        ForSending, /**< Open address book to pick address for sending */
+        ForEditing  /**< Open address book for editing */
     };
 
     explicit AddressBookPage(Mode mode, Tabs tab, QWidget *parent = 0);
diff --git a/src/qt/addresstablemodel.h b/src/qt/addresstablemodel.h
index f4a8dad845..0743300137 100644
--- a/src/qt/addresstablemodel.h
+++ b/src/qt/addresstablemodel.h
@@ -8,6 +8,9 @@ class AddressTablePriv;
 class CWallet;
 class WalletModel;
 
+/**
+   Qt model of the address book in the core. This allows views to access and modify the address book.
+ */
 class AddressTableModel : public QAbstractTableModel
 {
     Q_OBJECT
@@ -16,27 +19,28 @@ public:
     ~AddressTableModel();
 
     enum ColumnIndex {
-        Label = 0,   /* User specified label */
-        Address = 1  /* Bitcoin address */
+        Label = 0,   /**< User specified label */
+        Address = 1  /**< Bitcoin address */
     };
 
     enum RoleIndex {
-        TypeRole = Qt::UserRole
+        TypeRole = Qt::UserRole /**< Type of address (#Send or #Receive) */
     };
 
-    // Return status of last edit/insert operation
+    /** Return status of edit/insert operation */
     enum EditStatus {
         OK,
-        INVALID_ADDRESS,
-        DUPLICATE_ADDRESS,
-        WALLET_UNLOCK_FAILURE,
-        KEY_GENERATION_FAILURE
+        INVALID_ADDRESS,   /**< Unparseable address */
+        DUPLICATE_ADDRESS,  /**< Address already in address book */
+        WALLET_UNLOCK_FAILURE, /**< Wallet could not be unlocked to create new receiving address */
+        KEY_GENERATION_FAILURE /**< Generating a new public key for a receiving address failed */
     };
 
-    static const QString Send; /* Send addres */
-    static const QString Receive; /* Receive address */
+    static const QString Send; /**< Specifies send address */
+    static const QString Receive; /**< Specifies receive address */
 
-    /* Overridden methods from QAbstractTableModel */
+    /** @name Methods overridden from QAbstractTableModel
+        @{*/
     int rowCount(const QModelIndex &parent) const;
     int columnCount(const QModelIndex &parent) const;
     QVariant data(const QModelIndex &index, int role) const;
@@ -45,6 +49,7 @@ public:
     QModelIndex index(int row, int column, const QModelIndex & parent) const;
     bool removeRows(int row, int count, const QModelIndex & parent = QModelIndex());
     Qt::ItemFlags flags(const QModelIndex & index) const;
+    /*@}*/
 
     /* Add an address to the model.
        Returns the added address on success, and an empty string otherwise.
diff --git a/src/qt/askpassphrasedialog.h b/src/qt/askpassphrasedialog.h
index 761612cbfd..32a3f6a5f3 100644
--- a/src/qt/askpassphrasedialog.h
+++ b/src/qt/askpassphrasedialog.h
@@ -9,16 +9,18 @@ namespace Ui {
 
 class WalletModel;
 
+/** Multifunctional dialog to ask for passphrases. Used for encryption, unlocking, and changing the passphrase.
+ */
 class AskPassphraseDialog : public QDialog
 {
     Q_OBJECT
 
 public:
     enum Mode {
-        Encrypt,    // Ask passphrase x2
-        Unlock,     // Ask passphrase
-        ChangePass, // Ask old passphrase + new passphrase x2
-        Decrypt   // Ask passphrase
+        Encrypt,    /**< Ask passphrase twice and encrypt */
+        Unlock,     /**< Ask passphrase and unlock */
+        ChangePass, /**< Ask old passphrase + new passphrase twice */
+        Decrypt     /**< Ask passphrase and decrypt wallet */
     };
 
     explicit AskPassphraseDialog(Mode mode, QWidget *parent = 0);
diff --git a/src/qt/bitcoinaddressvalidator.h b/src/qt/bitcoinaddressvalidator.h
index 73f6ea1f61..6ca3bd6a05 100644
--- a/src/qt/bitcoinaddressvalidator.h
+++ b/src/qt/bitcoinaddressvalidator.h
@@ -3,7 +3,7 @@
 
 #include <QRegExpValidator>
 
-/* Base48 entry widget validator.
+/** Base48 entry widget validator.
    Corrects near-miss characters and refuses characters that are no part of base48.
  */
 class BitcoinAddressValidator : public QValidator
diff --git a/src/qt/bitcoinamountfield.h b/src/qt/bitcoinamountfield.h
index 8457a418c2..ead8bdb84b 100644
--- a/src/qt/bitcoinamountfield.h
+++ b/src/qt/bitcoinamountfield.h
@@ -8,8 +8,8 @@ class QDoubleSpinBox;
 class QValueComboBox;
 QT_END_NAMESPACE
 
-// Coin amount entry widget with separate parts for whole
-// coins and decimals.
+/** Widget for entering bitcoin amounts.
+  */
 class BitcoinAmountField: public QWidget
 {
     Q_OBJECT
@@ -20,25 +20,27 @@ public:
     qint64 value(bool *valid=0) const;
     void setValue(qint64 value);
 
-    // Mark current valid as invalid in UI
+    /** Mark current value as invalid in UI. */
     void setValid(bool valid);
+    /** Perform input validation, mark field as invalid if entered value is not valid. */
     bool validate();
 
-    // Change current unit
+    /** Change unit used to display amount. */
     void setDisplayUnit(int unit);
 
-    // Make field empty and ready for new input
+    /** Make field empty and ready for new input. */
     void clear();
 
-    // Qt messes up the tab chain by default in some cases (issue http://bugreports.qt.nokia.com/browse/QTBUG-10907)
-    // Hence we have to set it up manually
+    /** Qt messes up the tab chain by default in some cases (issue http://bugreports.qt.nokia.com/browse/QTBUG-10907),
+        in these cases we have to set it up manually.
+    */
     QWidget *setupTabChain(QWidget *prev);
 
 signals:
     void textChanged();
 
 protected:
-    // Intercept focus-in event and ',' keypresses
+    /** Intercept focus-in event and ',' keypresses */
     bool eventFilter(QObject *object, QEvent *event);
 
 private:
diff --git a/src/qt/bitcoingui.h b/src/qt/bitcoingui.h
index a912192196..d01ab59ae6 100644
--- a/src/qt/bitcoingui.h
+++ b/src/qt/bitcoingui.h
@@ -24,6 +24,10 @@ class QStackedWidget;
 class QUrl;
 QT_END_NAMESPACE
 
+/**
+  Bitcoin GUI main class. This class represents the main window of the Bitcoin UI. It communicates with both the client and
+  wallet models to give the user an up-to-date view of the current core state.
+*/
 class BitcoinGUI : public QMainWindow
 {
     Q_OBJECT
@@ -31,17 +35,16 @@ public:
     explicit BitcoinGUI(QWidget *parent = 0);
     ~BitcoinGUI();
 
+    /** Set the client model.
+        The client model represents the part of the core that communicates with the P2P network, and is wallet-agnostic.
+    */
     void setClientModel(ClientModel *clientModel);
+    /** Set the wallet model.
+        The wallet model represents a bitcoin wallet, and offers access to the list of transactions, address book and sending
+        functionality.
+    */
     void setWalletModel(WalletModel *walletModel);
     
-    /* Transaction table tab indices */
-    enum {
-        AllTransactions = 0,
-        SentReceived = 1,
-        Sent = 2,
-        Received = 3
-    } TabIndex;
-
 protected:
     void changeEvent(QEvent *e);
     void closeEvent(QCloseEvent *event);
@@ -86,41 +89,68 @@ private:
 
     QMovie *syncIconMovie;
 
+    /** Create the main UI actions. */
     void createActions();
+    /** Create the menu bar and submenus. */
     void createMenuBar();
+    /** Create the toolbars */
     void createToolBars();
-    QWidget *createTabs();
+    /** Create system tray (notification) icon */
     void createTrayIcon();
 
 public slots:
+    /** Set number of connections shown in the UI */
     void setNumConnections(int count);
+    /** Set number of blocks shown in the UI */
     void setNumBlocks(int count);
+    /** Set the encryption status as shown in the UI.
+       @param[in] status            current encryption status
+       @see WalletModel::EncryptionStatus
+    */
     void setEncryptionStatus(int status);
 
+    /** Notify the user of an error in the network or transaction handling code. */
     void error(const QString &title, const QString &message);
-    /* It is currently not possible to pass a return value to another thread through
-       BlockingQueuedConnection, so use an indirected pointer.
+    /** Asks the user whether to pay the transaction fee or to cancel the transaction.
+       It is currently not possible to pass a return value to another thread through
+       BlockingQueuedConnection, so an indirected pointer is used.
        http://bugreports.qt.nokia.com/browse/QTBUG-10440
+
+      @param[in] nFeeRequired       the required fee
+      @param[out] payFee            true to pay the fee, false to not pay the fee
     */
     void askFee(qint64 nFeeRequired, bool *payFee);
 
 private slots:
-    // UI pages
+    /** Switch to overview (home) page */
     void gotoOverviewPage();
+    /** Switch to history (transactions) page */
     void gotoHistoryPage();
+    /** Switch to address book page */
     void gotoAddressBookPage();
+    /** Switch to receive coins page */
     void gotoReceiveCoinsPage();
+    /** Switch to send coins page */
     void gotoSendCoinsPage();
 
-    // Misc actions
+    /** Show configuration dialog */
     void optionsClicked();
+    /** Show about dialog */
     void aboutClicked();
 #ifndef Q_WS_MAC
+    /** Handle tray icon clicked */
     void trayIconActivated(QSystemTrayIcon::ActivationReason reason);
 #endif
+    /** Show incoming transaction notification for new transactions.
+
+        The new items are those between start and end inclusive, under the given parent item.
+    */
     void incomingTransaction(const QModelIndex & parent, int start, int end);
+    /** Encrypt the wallet */
     void encryptWallet(bool status);
+    /** Change encrypted wallet passphrase */
     void changePassphrase();
+    /** Ask for pass phrase to unlock wallet temporarily */
     void unlockWallet();
 };
 
diff --git a/src/qt/bitcoinunits.h b/src/qt/bitcoinunits.h
index a7bebbc3e4..18fa36a0b7 100644
--- a/src/qt/bitcoinunits.h
+++ b/src/qt/bitcoinunits.h
@@ -4,51 +4,60 @@
 #include <QString>
 #include <QAbstractListModel>
 
-// Bitcoin unit definitions, encapsulates parsing and formatting
-// and serves as list model for dropdown selection boxes.
+/** Bitcoin unit definitions. Encapsulates parsing and formatting
+   and serves as list model for dropdown selection boxes.
+*/
 class BitcoinUnits: public QAbstractListModel
 {
 public:
     explicit BitcoinUnits(QObject *parent);
 
+    /** Bitcoin units.
+      @note Source: https://en.bitcoin.it/wiki/Units . Please add only sensible ones
+     */
     enum Unit
     {
-        // Source: https://en.bitcoin.it/wiki/Units
-        // Please add only sensible ones
         BTC,
         mBTC,
         uBTC
     };
 
-    /// Static API
-    // Get list of units, for dropdown box
+    //! @name Static API
+    //! Unit conversion and formatting
+    ///@{
+
+    //! Get list of units, for dropdown box
     static QList<Unit> availableUnits();
-    // Is unit ID valid?
+    //! Is unit ID valid?
     static bool valid(int unit);
-    // Short name
+    //! Short name
     static QString name(int unit);
-    // Longer description
+    //! Longer description
     static QString description(int unit);
-    // Number of satoshis / unit
+    //! Number of Satoshis (1e-8) per unit
     static qint64 factor(int unit);
-    // Number of amount digits (to represent max number of coins)
+    //! Number of amount digits (to represent max number of coins)
     static int amountDigits(int unit);
-    // Number of decimals left
+    //! Number of decimals left
     static int decimals(int unit);
-    // Format as string
+    //! Format as string
     static QString format(int unit, qint64 amount, bool plussign=false);
-    // Format as string (with unit)
+    //! Format as string (with unit)
     static QString formatWithUnit(int unit, qint64 amount, bool plussign=false);
-    // Parse string to coin amount
+    //! Parse string to coin amount
     static bool parse(int unit, const QString &value, qint64 *val_out);
+    ///@}
 
-    /// AbstractListModel implementation
-    enum {
-        // Unit identifier
+    //! @name AbstractListModel implementation
+    //! List model for unit dropdown selection box.
+    ///@{
+    enum RoleIndex {
+        /** Unit identifier */
         UnitRole = Qt::UserRole
-    } RoleIndex;
+    };
     int rowCount(const QModelIndex &parent) const;
     QVariant data(const QModelIndex &index, int role) const;
+    ///@}
 private:
     QList<BitcoinUnits::Unit> unitlist;
 };
diff --git a/src/qt/clientmodel.h b/src/qt/clientmodel.h
index c68fb0f035..b4054b5d87 100644
--- a/src/qt/clientmodel.h
+++ b/src/qt/clientmodel.h
@@ -12,7 +12,7 @@ QT_BEGIN_NAMESPACE
 class QDateTime;
 QT_END_NAMESPACE
 
-// Model for Bitcoin network client
+/** Model for Bitcoin network client. */
 class ClientModel : public QObject
 {
     Q_OBJECT
@@ -27,11 +27,11 @@ public:
 
     QDateTime getLastBlockDate() const;
 
-    // Return true if client connected to testnet
+    //! Return true if client connected to testnet
     bool isTestNet() const;
-    // Return true if core is doing initial block download
+    //! Return true if core is doing initial block download
     bool inInitialBlockDownload() const;
-    // Return conservative estimate of total number of blocks, or 0 if unknown
+    //! Return conservative estimate of total number of blocks, or 0 if unknown
     int getNumBlocksOfPeers() const;
 
     QString formatFullVersion() const;
@@ -48,7 +48,7 @@ signals:
     void numConnectionsChanged(int count);
     void numBlocksChanged(int count);
 
-    // Asynchronous error notification
+    //! Asynchronous error notification
     void error(const QString &title, const QString &message);
 
 public slots:
diff --git a/src/qt/csvmodelwriter.h b/src/qt/csvmodelwriter.h
index 7367f3a6a9..6c9dcbaf3b 100644
--- a/src/qt/csvmodelwriter.h
+++ b/src/qt/csvmodelwriter.h
@@ -8,7 +8,9 @@ QT_BEGIN_NAMESPACE
 class QAbstractItemModel;
 QT_END_NAMESPACE
 
-// Export TableModel to CSV file
+/** Export a Qt table model to a CSV file. This is useful for analyzing or post-processing the data in
+    a spreadsheet.
+ */
 class CSVModelWriter : public QObject
 {
     Q_OBJECT
@@ -18,8 +20,9 @@ public:
     void setModel(const QAbstractItemModel *model);
     void addColumn(const QString &title, int column, int role=Qt::EditRole);
 
-    // Perform write operation
-    // Returns true on success, false otherwise
+    /** Perform export of the model to CSV.
+        @returns true on success, false otherwise
+    */
     bool write();
 
 private:
diff --git a/src/qt/editaddressdialog.h b/src/qt/editaddressdialog.h
index 9c9769d407..7ec053f135 100644
--- a/src/qt/editaddressdialog.h
+++ b/src/qt/editaddressdialog.h
@@ -12,6 +12,8 @@ namespace Ui {
 }
 class AddressTableModel;
 
+/** Dialog for editing an address and associated information.
+ */
 class EditAddressDialog : public QDialog
 {
     Q_OBJECT
diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
index bc4ddb8aae..94e3314d14 100644
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -12,6 +12,8 @@ class QUrl;
 QT_END_NAMESPACE
 class SendCoinsRecipient;
 
+/** Static utility functions used by the Bitcoin Qt UI.
+ */
 class GUIUtil
 {
 public:
diff --git a/src/qt/macdockiconhandler.h b/src/qt/macdockiconhandler.h
index cc78c7a787..d02c148f91 100644
--- a/src/qt/macdockiconhandler.h
+++ b/src/qt/macdockiconhandler.h
@@ -8,6 +8,8 @@ class QIcon;
 class QWidget;
 class objc_object;
 
+/** Macintosh-specific dock icon handler.
+ */
 class MacDockIconHandler : public QObject
 {
     Q_OBJECT
diff --git a/src/qt/monitoreddatamapper.h b/src/qt/monitoreddatamapper.h
index 4dd2d1a86a..33a874e73a 100644
--- a/src/qt/monitoreddatamapper.h
+++ b/src/qt/monitoreddatamapper.h
@@ -7,9 +7,8 @@ QT_BEGIN_NAMESPACE
 class QWidget;
 QT_END_NAMESPACE
 
-/* Data <-> Widget mapper that watches for changes,
-   to be able to notify when 'dirty' (for example, to
-   enable a commit/apply button).
+/** Data to Widget mapper that watches for edits and notifies listeners when a field is edited.
+   This can be used, for example, to enable a commit/apply button in a configuration dialog.
  */
 class MonitoredDataMapper : public QDataWidgetMapper
 {
diff --git a/src/qt/notificator.h b/src/qt/notificator.h
index ed69ae5c61..2d83013a7f 100644
--- a/src/qt/notificator.h
+++ b/src/qt/notificator.h
@@ -11,33 +11,34 @@ class QDBusInterface;
 #endif
 QT_END_NAMESPACE
 
-// Cross-platform desktop notification client
+/** Cross-platform desktop notification client. */
 class Notificator: public QObject
 {
     Q_OBJECT
 public:
-    // Create a new notificator
-    // Ownership of trayIcon is not transferred to this object
+    /** Create a new notificator.
+       @note Ownership of trayIcon is not transferred to this object.
+    */
     Notificator(const QString &programName=QString(), QSystemTrayIcon *trayIcon=0, QWidget *parent=0);
     ~Notificator();
 
     // Message class
     enum Class
     {
-        Information,
-        Warning,
-        Critical,
+        Information,         /**< Informational message */
+        Warning,             /**< Notify user of potential problem */
+        Critical             /**< An error occured */
     };
 
 public slots:
 
-    /* Show notification message.
-     *
-     *  cls: general message class
-     *  title: title shown with message
-     *  text: message content
-     *  icon: optional icon to show with message
-     *  millisTimeout: notification timeout in milliseconds (default 10 seconds)
+    /** Show notification message.
+       @param[in] cls    general message class
+       @param[in] title  title shown with message
+       @param[in] text   message content
+       @param[in] icon   optional icon to show with message
+       @param[in] millisTimeout notification timeout in milliseconds (defaults to 10 seconds)
+       @note Platform implementations are free to ignore any of the provided fields except for \a text.
      */
     void notify(Class cls, const QString &title, const QString &text,
                 const QIcon &icon = QIcon(), int millisTimeout = 10000);
@@ -45,10 +46,10 @@ public slots:
 private:
     QWidget *parent;
     enum Mode {
-        None,
-        Freedesktop, // Use DBus org.freedesktop.Notifications
-        QSystemTray, // Use QSystemTray::showMessage
-        Growl // Use the Growl notification system (Mac only)
+        None,        /**< Ignore informational notifications, and show a modal pop-up dialog for Critical notifications. */
+        Freedesktop, /**< Use DBus org.freedesktop.Notifications */
+        QSystemTray, /**< Use QSystemTray::showMessage */
+        Growl        /**< Use the Growl notification system (Mac only) */
     };
     QString programName;
     Mode mode;
diff --git a/src/qt/optionsdialog.h b/src/qt/optionsdialog.h
index d5238a3664..9e1f87c646 100644
--- a/src/qt/optionsdialog.h
+++ b/src/qt/optionsdialog.h
@@ -14,6 +14,7 @@ class MainOptionsPage;
 class DisplayOptionsPage;
 class MonitoredDataMapper;
 
+/** Preferences dialog. */
 class OptionsDialog : public QDialog
 {
     Q_OBJECT
@@ -25,6 +26,7 @@ public:
 signals:
 
 public slots:
+    /** Change the current page to \a index. */
     void changePage(int index);
 
 private slots:
@@ -33,6 +35,7 @@ private slots:
     void applyClicked();
     void enableApply();
     void disableApply();
+
 private:
     QListWidget *contents_widget;
     QStackedWidget *pages_widget;
diff --git a/src/qt/optionsmodel.h b/src/qt/optionsmodel.h
index 7f489c5014..775362d636 100644
--- a/src/qt/optionsmodel.h
+++ b/src/qt/optionsmodel.h
@@ -5,7 +5,7 @@
 
 class CWallet;
 
-/* Interface from QT to configuration data structure for bitcoin client.
+/** Interface from QT to configuration data structure for bitcoin client.
    To QT, the options are presented as a list with the different options
    laid out vertically.
    This can be changed to a tree once the settings become sufficiently
diff --git a/src/qt/overviewpage.h b/src/qt/overviewpage.h
index 4b4cc922ca..1199227168 100644
--- a/src/qt/overviewpage.h
+++ b/src/qt/overviewpage.h
@@ -13,6 +13,7 @@ namespace Ui {
 class WalletModel;
 class TxViewDelegate;
 
+/** Overview ("home") page widget */
 class OverviewPage : public QWidget
 {
     Q_OBJECT
diff --git a/src/qt/qvalidatedlineedit.h b/src/qt/qvalidatedlineedit.h
index f7b9486a6e..66e26be9a3 100644
--- a/src/qt/qvalidatedlineedit.h
+++ b/src/qt/qvalidatedlineedit.h
@@ -3,8 +3,9 @@
 
 #include <QLineEdit>
 
-// Line edit that can be marked as "invalid". When marked as invalid,
-// it will get a red background until it is focused.
+/** Line edit that can be marked as "invalid" to show input validation feedback. When marked as invalid,
+   it will get a red background until it is focused.
+ */
 class QValidatedLineEdit : public QLineEdit
 {
     Q_OBJECT
diff --git a/src/qt/qvaluecombobox.h b/src/qt/qvaluecombobox.h
index 2a3533da9e..11f342d71c 100644
--- a/src/qt/qvaluecombobox.h
+++ b/src/qt/qvaluecombobox.h
@@ -3,19 +3,18 @@
 
 #include <QComboBox>
 
-// QComboBox that can be used with QDataWidgetMapper to select
-// ordinal values from a model.
+/* QComboBox that can be used with QDataWidgetMapper to select ordinal values from a model. */
 class QValueComboBox : public QComboBox
 {
     Q_OBJECT
-    Q_PROPERTY(int value READ value WRITE setValue NOTIFY valueChanged USER true);
+    Q_PROPERTY(int value READ value WRITE setValue NOTIFY valueChanged USER true)
 public:
     explicit QValueComboBox(QWidget *parent = 0);
 
     int value() const;
     void setValue(int value);
 
-    // Model role to use as value
+    /** Specify model role to use as ordinal value */
     void setRole(int role);
 
 signals:
diff --git a/src/qt/sendcoinsdialog.h b/src/qt/sendcoinsdialog.h
index a14f99e8b2..82910257f0 100644
--- a/src/qt/sendcoinsdialog.h
+++ b/src/qt/sendcoinsdialog.h
@@ -14,6 +14,7 @@ QT_BEGIN_NAMESPACE
 class QUrl;
 QT_END_NAMESPACE
 
+/** Dialog for sending bitcoins */
 class SendCoinsDialog : public QDialog
 {
     Q_OBJECT
@@ -24,8 +25,8 @@ public:
 
     void setModel(WalletModel *model);
 
-    // Qt messes up the tab chain by default in some cases (issue http://bugreports.qt.nokia.com/browse/QTBUG-10907)
-    // Hence we have to set it up manually
+    /** Set up the tab chain manually, as Qt messes up the tab chain by default in some cases (issue http://bugreports.qt.nokia.com/browse/QTBUG-10907).
+     */
     QWidget *setupTabChain(QWidget *prev);
 
     void pasteEntry(const SendCoinsRecipient &rv);
diff --git a/src/qt/sendcoinsentry.h b/src/qt/sendcoinsentry.h
index ccc223b5f5..b7f4a0af3b 100644
--- a/src/qt/sendcoinsentry.h
+++ b/src/qt/sendcoinsentry.h
@@ -9,6 +9,7 @@ namespace Ui {
 class WalletModel;
 class SendCoinsRecipient;
 
+/** A single entry in the dialog for sending bitcoins. */
 class SendCoinsEntry : public QFrame
 {
     Q_OBJECT
@@ -21,13 +22,13 @@ public:
     bool validate();
     SendCoinsRecipient getValue();
 
-    // Return true if the entry is still empty and unedited
+    /** Return whether the entry is still empty and unedited */
     bool isClear();
 
     void setValue(const SendCoinsRecipient &value);
 
-    // Qt messes up the tab chain by default in some cases (issue http://bugreports.qt.nokia.com/browse/QTBUG-10907)
-    // Hence we have to set it up manually
+    /** Set up the tab chain manually, as Qt messes up the tab chain by default in some cases (issue http://bugreports.qt.nokia.com/browse/QTBUG-10907).
+     */
     QWidget *setupTabChain(QWidget *prev);
 
 public slots:
diff --git a/src/qt/transactiondesc.h b/src/qt/transactiondesc.h
index 484bb1230e..55b9eaf489 100644
--- a/src/qt/transactiondesc.h
+++ b/src/qt/transactiondesc.h
@@ -8,11 +8,12 @@
 class CWallet;
 class CWalletTx;
 
+/** Provide a human-readable extended HTML description of a transaction.
+ */
 class TransactionDesc: public QObject
 {
     Q_OBJECT
 public:
-    // Provide human-readable extended HTML description of a transaction
     static QString toHTML(CWallet *wallet, CWalletTx &wtx);
 private:
     TransactionDesc() {}
diff --git a/src/qt/transactiondescdialog.h b/src/qt/transactiondescdialog.h
index 4f8f754b2b..e86fb58a64 100644
--- a/src/qt/transactiondescdialog.h
+++ b/src/qt/transactiondescdialog.h
@@ -10,6 +10,7 @@ QT_BEGIN_NAMESPACE
 class QModelIndex;
 QT_END_NAMESPACE
 
+/** Dialog showing transaction details. */
 class TransactionDescDialog : public QDialog
 {
     Q_OBJECT
diff --git a/src/qt/transactionfilterproxy.h b/src/qt/transactionfilterproxy.h
index 4dd2a8e5c6..76cf46f156 100644
--- a/src/qt/transactionfilterproxy.h
+++ b/src/qt/transactionfilterproxy.h
@@ -4,29 +4,31 @@
 #include <QSortFilterProxyModel>
 #include <QDateTime>
 
-// Filter transaction list according to pre-specified rules
+/** Filter the transaction list according to pre-specified rules. */
 class TransactionFilterProxy : public QSortFilterProxyModel
 {
     Q_OBJECT
 public:
     explicit TransactionFilterProxy(QObject *parent = 0);
 
-    // Earliest date that can be represented (far in the past)
+    /** Earliest date that can be represented (far in the past) */
     static const QDateTime MIN_DATE;
-    // Last date that can be represented (far in the future)
+    /** Last date that can be represented (far in the future) */
     static const QDateTime MAX_DATE;
-    // Type filter bit field (all types)
+    /** Type filter bit field (all types) */
     static const quint32 ALL_TYPES = 0xFFFFFFFF;
 
     static quint32 TYPE(int type) { return 1<<type; }
 
     void setDateRange(const QDateTime &from, const QDateTime &to);
     void setAddressPrefix(const QString &addrPrefix);
-    // Type filter takes a bitfield created with TYPE() or ALL_TYPES
+    /**
+      @note Type filter takes a bitfield created with TYPE() or ALL_TYPES
+     */
     void setTypeFilter(quint32 modes);
     void setMinAmount(qint64 minimum);
 
-    // Set maximum number of rows returned, -1 if unlimited
+    /** Set maximum number of rows returned, -1 if unlimited. */
     void setLimit(int limit);
 
     int	rowCount(const QModelIndex &parent = QModelIndex()) const;
diff --git a/src/qt/transactionrecord.h b/src/qt/transactionrecord.h
index 0050c878ee..704cfe65b7 100644
--- a/src/qt/transactionrecord.h
+++ b/src/qt/transactionrecord.h
@@ -8,6 +8,8 @@
 class CWallet;
 class CWalletTx;
 
+/** UI model for transaction status. The transaction status is the part of a transaction that will change over time.
+ */
 class TransactionStatus
 {
 public:
@@ -20,7 +22,7 @@ public:
     {
         Immature,
         Mature,
-        MaturesWarning, /* Will likely not mature because no nodes have confirmed */
+        MaturesWarning, /**< Transaction will likely not mature because no nodes have confirmed */
         NotAccepted
     };
 
@@ -35,19 +37,26 @@ public:
     bool confirmed;
     std::string sortKey;
 
-    /* For "Generated" transactions */
+    /** @name Generated (mined) transactions
+       @{*/
     Maturity maturity;
     int matures_in;
+    /**@}*/
 
-    /* Reported status */
+    /** @name Reported status
+       @{*/
     Status status;
     int64 depth;
-    int64 open_for; /* Timestamp if status==OpenUntilDate, otherwise number of blocks */
+    int64 open_for; /**< Timestamp if status==OpenUntilDate, otherwise number of blocks */
+    /**@}*/
 
-    /* Current number of blocks (to know whether cached status is still valid. */
+    /** Current number of blocks (to know whether cached status is still valid) */
     int cur_num_blocks;
 };
 
+/** UI model for a transaction. A core transaction can be represented by multiple UI transactions if it has
+    multiple outputs.
+ */
 class TransactionRecord
 {
 public:
@@ -62,7 +71,7 @@ public:
         SendToSelf
     };
 
-    /* Number of confirmation needed for transaction */
+    /** Number of confirmation needed for transaction */
     static const int NumConfirmations = 6;
 
     TransactionRecord():
@@ -84,33 +93,35 @@ public:
     {
     }
 
-    /* Decompose CWallet transaction to model transaction records.
+    /** Decompose CWallet transaction to model transaction records.
      */
     static bool showTransaction(const CWalletTx &wtx);
     static QList<TransactionRecord> decomposeTransaction(const CWallet *wallet, const CWalletTx &wtx);
 
-    /* Fixed */
+    /** @name Immutable transaction attributes
+      @{*/
     uint256 hash;
     int64 time;
     Type type;
     std::string address;
     int64 debit;
     int64 credit;
+    /**@}*/
 
-    /* Subtransaction index, for sort key */
+    /** Subtransaction index, for sort key */
     int idx;
 
-    /* Status: can change with block chain update */
+    /** Status: can change with block chain update */
     TransactionStatus status;
 
-    /* Return the unique identifier for this transaction (part) */
+    /** Return the unique identifier for this transaction (part) */
     std::string getTxID();
 
-    /* Update status from wallet tx.
+    /** Update status from core wallet tx.
      */
     void updateStatus(const CWalletTx &wtx);
 
-    /* Is a status update needed?
+    /** Return whether a status update is needed.
      */
     bool statusUpdateNeeded();
 };
diff --git a/src/qt/transactiontablemodel.h b/src/qt/transactiontablemodel.h
index da55495e1e..db88a0604f 100644
--- a/src/qt/transactiontablemodel.h
+++ b/src/qt/transactiontablemodel.h
@@ -9,6 +9,8 @@ class TransactionTablePriv;
 class TransactionRecord;
 class WalletModel;
 
+/** UI model for the transaction table of a wallet.
+ */
 class TransactionTableModel : public QAbstractTableModel
 {
     Q_OBJECT
@@ -16,36 +18,37 @@ public:
     explicit TransactionTableModel(CWallet* wallet, WalletModel *parent = 0);
     ~TransactionTableModel();
 
-    enum {
+    enum ColumnIndex {
         Status = 0,
         Date = 1,
         Type = 2,
         ToAddress = 3,
         Amount = 4
-    } ColumnIndex;
+    };
 
-    // Roles to get specific information from a transaction row
-    // These are independent of column
-    enum {
-        // Type of transaction
+    /** Roles to get specific information from a transaction row.
+        These are independent of column.
+    */
+    enum RoleIndex {
+        /** Type of transaction */
         TypeRole = Qt::UserRole,
-        // Date and time this transaction was created
+        /** Date and time this transaction was created */
         DateRole,
-        // Long description (HTML format)
+        /** Long description (HTML format) */
         LongDescriptionRole,
-        // Address of transaction
+        /** Address of transaction */
         AddressRole,
-        // Label of address related to transaction
+        /** Label of address related to transaction */
         LabelRole,
-        // Net amount of transaction
+        /** Net amount of transaction */
         AmountRole,
-        // Unique identifier
+        /** Unique identifier */
         TxIDRole,
-        // Is transaction confirmed?
+        /** Is transaction confirmed? */
         ConfirmedRole,
-        // Formatted amount, without brackets when unconfirmed
+        /** Formatted amount, without brackets when unconfirmed */
         FormattedAmountRole
-    } RoleIndex;
+    };
 
     int rowCount(const QModelIndex &parent) const;
     int columnCount(const QModelIndex &parent) const;
diff --git a/src/qt/transactionview.h b/src/qt/transactionview.h
index f4f815b162..67d0b46f30 100644
--- a/src/qt/transactionview.h
+++ b/src/qt/transactionview.h
@@ -16,6 +16,9 @@ class QFrame;
 class QDateTimeEdit;
 QT_END_NAMESPACE
 
+/** Widget showing the transaction list for a wallet, including a filter row.
+    Using the filter row, the user can view or export a subset of the transactions.
+  */
 class TransactionView : public QWidget
 {
     Q_OBJECT
diff --git a/src/qt/walletmodel.h b/src/qt/walletmodel.h
index b7b6973b3b..43b96f6d0e 100644
--- a/src/qt/walletmodel.h
+++ b/src/qt/walletmodel.h
@@ -16,7 +16,7 @@ struct SendCoinsRecipient
     qint64 amount;
 };
 
-// Interface to Bitcoin wallet from Qt view code
+/** Interface to Bitcoin wallet from Qt view code. */
 class WalletModel : public QObject
 {
     Q_OBJECT