update CClientUIInterface and remove orphan Wx stuff

- fix ThreadSafeMessageBox always displays error icon
- allow to specify MSG_ERROR / MSG_WARNING or MSG_INFORMATION without a
  custom caption / title
- allow to specify CClientUIInterface::ICON_ERROR / ICON_WARNING and
  ICON_INFORMATION (which is default) as message box icon
- remove CClientUIInterface::OK from ThreadSafeMessageBox-calls, as
  the OK button will be set as default, if none is specified
- prepend "Bitcoin - " to used captions
- rename BitcoinGUI::error() -> BitcoinGUI::message() and add function
  documentation
- change all style parameters and enum flags to unsigned
- update code to use that new API

- update Client- and WalletModel to use new BitcoinGUI::message() and
  rename the classes error() method into message()
- include the possibility to supply the wanted icon for messages from
  Client- and WalletModel via "style" parameter

12 files changed, 133 insertions, 66 deletions

diff --git a/src/bitcoinrpc.cpp b/src/bitcoinrpc.cpp
index 07b616438e..481ceb9f40 100644
--- a/src/bitcoinrpc.cpp
+++ b/src/bitcoinrpc.cpp
@@ -769,7 +769,7 @@ void ThreadRPCServer2(void* parg)
                 strWhatAmI.c_str(),
                 GetConfigFile().string().c_str(),
                 EncodeBase58(&rand_pwd[0],&rand_pwd[0]+32).c_str()),
-            _("Error"), CClientUIInterface::OK | CClientUIInterface::MODAL);
+                "", CClientUIInterface::MSG_ERROR);
         StartShutdown();
         return;
     }
@@ -860,7 +860,7 @@ void ThreadRPCServer2(void* parg)
     }
 
     if (!fListening) {
-        uiInterface.ThreadSafeMessageBox(strerr, _("Error"), CClientUIInterface::OK | CClientUIInterface::MODAL);
+        uiInterface.ThreadSafeMessageBox(strerr, "", CClientUIInterface::MSG_ERROR);
         StartShutdown();
         return;
     }
diff --git a/src/init.cpp b/src/init.cpp
index 06f7359f80..e0fbb31338 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -2,6 +2,7 @@
 // Copyright (c) 2009-2012 The Bitcoin developers
 // Distributed under the MIT/X11 software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #include "txdb.h"
 #include "walletdb.h"
 #include "bitcoinrpc.h"
@@ -9,6 +10,7 @@
 #include "init.h"
 #include "util.h"
 #include "ui_interface.h"
+
 #include <boost/filesystem.hpp>
 #include <boost/filesystem/fstream.hpp>
 #include <boost/filesystem/convenience.hpp>
@@ -209,17 +211,16 @@ int main(int argc, char* argv[])
 
 bool static InitError(const std::string &str)
 {
-    uiInterface.ThreadSafeMessageBox(str, _("Bitcoin"), CClientUIInterface::OK | CClientUIInterface::MODAL);
+    uiInterface.ThreadSafeMessageBox(str, "", CClientUIInterface::MSG_ERROR);
     return false;
 }
 
 bool static InitWarning(const std::string &str)
 {
-    uiInterface.ThreadSafeMessageBox(str, _("Bitcoin"), CClientUIInterface::OK | CClientUIInterface::ICON_EXCLAMATION | CClientUIInterface::MODAL);
+    uiInterface.ThreadSafeMessageBox(str, "", CClientUIInterface::MSG_WARNING);
     return true;
 }
 
-
 bool static Bind(const CService &addr, unsigned int flags) {
     if (!(flags & BF_EXPLICIT) && IsLimited(addr))
         return false;
@@ -608,7 +609,7 @@ bool AppInit2()
                                      " Original wallet.dat saved as wallet.{timestamp}.bak in %s; if"
                                      " your balance or transactions are incorrect you should"
                                      " restore from a backup."), strDataDir.c_str());
-            uiInterface.ThreadSafeMessageBox(msg, _("Bitcoin"), CClientUIInterface::OK | CClientUIInterface::ICON_EXCLAMATION | CClientUIInterface::MODAL);
+            InitWarning(msg);
         }
         if (r == CDBEnv::RECOVER_FAIL)
             return InitError(_("wallet.dat corrupt, salvage failed"));
@@ -808,7 +809,7 @@ bool AppInit2()
         {
             string msg(_("Warning: error reading wallet.dat! All keys read correctly, but transaction data"
                          " or address book entries might be missing or incorrect."));
-            uiInterface.ThreadSafeMessageBox(msg, _("Bitcoin"), CClientUIInterface::OK | CClientUIInterface::ICON_EXCLAMATION | CClientUIInterface::MODAL);
+            InitWarning(msg);
         }
         else if (nLoadWalletRet == DB_TOO_NEW)
             strErrors << _("Error loading wallet.dat: Wallet requires newer version of Bitcoin") << "\n";
@@ -914,7 +915,7 @@ bool AppInit2()
 
     //// debug print
     printf("mapBlockIndex.size() = %"PRIszu"\n",   mapBlockIndex.size());
-    printf("nBestHeight = %d\n",            nBestHeight);
+    printf("nBestHeight = %d\n",                   nBestHeight);
     printf("setKeyPool.size() = %"PRIszu"\n",      pwalletMain->setKeyPool.size());
     printf("mapWallet.size() = %"PRIszu"\n",       pwalletMain->mapWallet.size());
     printf("mapAddressBook.size() = %"PRIszu"\n",  pwalletMain->mapAddressBook.size());
diff --git a/src/main.cpp b/src/main.cpp
index 4c2115688a..8279924a3c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2197,10 +2197,10 @@ bool CheckDiskSpace(uint64 nAdditionalBytes)
     if (nFreeBytesAvailable < nMinDiskSpace + nAdditionalBytes)
     {
         fShutdown = true;
-        string strMessage = _("Warning: Disk space is low!");
+        string strMessage = _("Error: Disk space is low!");
         strMiscWarning = strMessage;
         printf("*** %s\n", strMessage.c_str());
-        uiInterface.ThreadSafeMessageBox(strMessage, "Bitcoin", CClientUIInterface::OK | CClientUIInterface::ICON_EXCLAMATION | CClientUIInterface::MODAL);
+        uiInterface.ThreadSafeMessageBox(strMessage, "", CClientUIInterface::MSG_ERROR);
         StartShutdown();
         return false;
     }
@@ -3681,7 +3681,6 @@ public:
 
 CBlock* CreateNewBlock(CReserveKey& reservekey)
 {
-
     // Create new block
     auto_ptr<CBlock> pblock(new CBlock());
     if (!pblock.get())
diff --git a/src/noui.cpp b/src/noui.cpp
index db25f2d285..ba2b1aab4d 100644
--- a/src/noui.cpp
+++ b/src/noui.cpp
@@ -2,16 +2,33 @@
 // Copyright (c) 2009-2012 The Bitcoin developers
 // Distributed under the MIT/X11 software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #include "ui_interface.h"
 #include "init.h"
 #include "bitcoinrpc.h"
 
 #include <string>
 
-static int noui_ThreadSafeMessageBox(const std::string& message, const std::string& caption, int style)
+static int noui_ThreadSafeMessageBox(const std::string& message, const std::string& caption, unsigned int style)
 {
+    std::string strCaption;
+    // Check for usage of predefined caption
+    switch (style) {
+    case CClientUIInterface::MSG_ERROR:
+        strCaption += _("Error");
+        break;
+    case CClientUIInterface::MSG_WARNING:
+        strCaption += _("Warning");
+        break;
+    case CClientUIInterface::MSG_INFORMATION:
+        strCaption += _("Information");
+        break;
+    default:
+        strCaption += caption; // Use supplied caption
+    }
+
     printf("%s: %s\n", caption.c_str(), message.c_str());
-    fprintf(stderr, "%s: %s\n", caption.c_str(), message.c_str());
+    fprintf(stderr, "%s: %s\n", strCaption.c_str(), message.c_str());
     return 4;
 }
 
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index cd1764a53f..d64114e131 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -7,7 +7,6 @@
 #include "optionsmodel.h"
 #include "guiutil.h"
 #include "guiconstants.h"
-
 #include "init.h"
 #include "ui_interface.h"
 #include "qtipcserver.h"
@@ -35,18 +34,19 @@ Q_IMPORT_PLUGIN(qtaccessiblewidgets)
 static BitcoinGUI *guiref;
 static QSplashScreen *splashref;
 
-static void ThreadSafeMessageBox(const std::string& message, const std::string& caption, int style)
+static void ThreadSafeMessageBox(const std::string& message, const std::string& caption, unsigned int style)
 {
     // Message from network thread
     if(guiref)
     {
         bool modal = (style & CClientUIInterface::MODAL);
-        // in case of modal message, use blocking connection to wait for user to click OK
-        QMetaObject::invokeMethod(guiref, "error",
+        // In case of modal message, use blocking connection to wait for user to click a button
+        QMetaObject::invokeMethod(guiref, "message",
                                    modal ? GUIUtil::blockingGUIThreadConnection() : Qt::QueuedConnection,
                                    Q_ARG(QString, QString::fromStdString(caption)),
                                    Q_ARG(QString, QString::fromStdString(message)),
-                                   Q_ARG(bool, modal));
+                                   Q_ARG(bool, modal),
+                                   Q_ARG(unsigned int, style));
     }
     else
     {
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index 0198a92c05..e2350c09ee 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -25,6 +25,7 @@
 #include "notificator.h"
 #include "guiutil.h"
 #include "rpcconsole.h"
+#include "ui_interface.h"
 
 #ifdef Q_OS_MAC
 #include "macdockiconhandler.h"
@@ -366,8 +367,8 @@ void BitcoinGUI::setClientModel(ClientModel *clientModel)
         setNumBlocks(clientModel->getNumBlocks(), clientModel->getNumBlocksOfPeers());
         connect(clientModel, SIGNAL(numBlocksChanged(int,int)), this, SLOT(setNumBlocks(int,int)));
 
-        // Report errors from network/worker thread
-        connect(clientModel, SIGNAL(error(QString,QString,bool)), this, SLOT(error(QString,QString,bool)));
+        // Receive and report messages from network/worker thread
+        connect(clientModel, SIGNAL(message(QString,QString,bool,unsigned int)), this, SLOT(message(QString,QString,bool,unsigned int)));
 
         overviewPage->setClientModel(clientModel);
         rpcConsole->setClientModel(clientModel);
@@ -381,8 +382,8 @@ void BitcoinGUI::setWalletModel(WalletModel *walletModel)
     this->walletModel = walletModel;
     if(walletModel)
     {
-        // Report errors from wallet thread
-        connect(walletModel, SIGNAL(error(QString,QString,bool)), this, SLOT(error(QString,QString,bool)));
+        // Receive and report messages from wallet thread
+        connect(walletModel, SIGNAL(message(QString,QString,bool,unsigned int)), this, SLOT(message(QString,QString,bool,unsigned int)));
 
         // Put transaction list in tabs
         transactionView->setModel(walletModel);
@@ -592,15 +593,50 @@ void BitcoinGUI::setNumBlocks(int count, int nTotalBlocks)
     progressBar->setToolTip(tooltip);
 }
 
-void BitcoinGUI::error(const QString &title, const QString &message, bool modal)
+void BitcoinGUI::message(const QString &title, const QString &message, bool modal, unsigned int style)
 {
-    // Report errors from network/worker thread
-    if(modal)
-    {
-        QMessageBox::critical(this, title, message, QMessageBox::Ok, QMessageBox::Ok);
-    } else {
-        notificator->notify(Notificator::Critical, title, message);
+    QString strTitle = tr("Bitcoin") + " - ";
+    // Default to information icon
+    int nMBoxIcon = QMessageBox::Information;
+    int nNotifyIcon = Notificator::Information;
+
+    // Check for usage of predefined title
+    switch (style) {
+    case CClientUIInterface::MSG_ERROR:
+        strTitle += tr("Error");
+        break;
+    case CClientUIInterface::MSG_WARNING:
+        strTitle += tr("Warning");
+        break;
+    case CClientUIInterface::MSG_INFORMATION:
+        strTitle += tr("Information");
+        break;
+    default:
+        strTitle += title; // Use supplied title
+    }
+
+    // Check for error/warning icon
+    if (style & CClientUIInterface::ICON_ERROR) {
+        nMBoxIcon = QMessageBox::Critical;
+        nNotifyIcon = Notificator::Critical;
+    }
+    else if (style & CClientUIInterface::ICON_WARNING) {
+        nMBoxIcon = QMessageBox::Warning;
+        nNotifyIcon = Notificator::Warning;
+    }
+
+    // Display message
+    if (modal) {
+        // Check for buttons, use OK as default, if none was supplied
+        QMessageBox::StandardButton buttons;
+        if (!(buttons = (QMessageBox::StandardButton)(style & CClientUIInterface::BTN_MASK)))
+            buttons = QMessageBox::Ok;
+
+        QMessageBox mBox((QMessageBox::Icon)nMBoxIcon, strTitle, message, buttons);
+        mBox.exec();
     }
+    else
+        notificator->notify((Notificator::Class)nNotifyIcon, strTitle, message);
 }
 
 void BitcoinGUI::changeEvent(QEvent *e)
diff --git a/src/qt/bitcoingui.h b/src/qt/bitcoingui.h
index 8b4607d3ed..151b108be7 100644
--- a/src/qt/bitcoingui.h
+++ b/src/qt/bitcoingui.h
@@ -119,8 +119,14 @@ public slots:
     */
     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, bool modal);
+    /** Notify the user of an event from the core network or transaction handling code.
+       @param[in] title     the message box / notification title
+       @param[in] message   the displayed text
+       @param[in] modal     true to use a message box, false to use a notification
+       @param[in] style     style definitions (icon and used buttons - buttons only for message boxes)
+                            @see CClientUIInterface::MessageBoxFlags
+    */
+    void message(const QString &title, const QString &message, bool modal, unsigned int style);
     /** 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.
diff --git a/src/qt/clientmodel.cpp b/src/qt/clientmodel.cpp
index 9b7362d757..f8fa412019 100644
--- a/src/qt/clientmodel.cpp
+++ b/src/qt/clientmodel.cpp
@@ -84,7 +84,7 @@ void ClientModel::updateAlert(const QString &hash, int status)
         CAlert alert = CAlert::getAlertByHash(hash_256);
         if(!alert.IsNull())
         {
-            emit error(tr("Network Alert"), QString::fromStdString(alert.strStatusBar), false);
+            emit message(tr("Network Alert"), QString::fromStdString(alert.strStatusBar), false, CClientUIInterface::ICON_ERROR);
         }
     }
 
diff --git a/src/qt/clientmodel.h b/src/qt/clientmodel.h
index 7d6401ab25..b16b2d5004 100644
--- a/src/qt/clientmodel.h
+++ b/src/qt/clientmodel.h
@@ -70,8 +70,8 @@ signals:
     void numBlocksChanged(int count, int countOfPeers);
     void alertsChanged(const QString &warnings);
 
-    //! Asynchronous error notification
-    void error(const QString &title, const QString &message, bool modal);
+    //! Asynchronous message notification
+    void message(const QString &title, const QString &message, bool modal, unsigned int style);
 
 public slots:
     void updateTimer();
diff --git a/src/qt/walletmodel.h b/src/qt/walletmodel.h
index 62558a49df..3c8d5903b0 100644
--- a/src/qt/walletmodel.h
+++ b/src/qt/walletmodel.h
@@ -147,8 +147,8 @@ signals:
     // this means that the unlocking failed or was cancelled.
     void requireUnlock();
 
-    // Asynchronous error notification
-    void error(const QString &title, const QString &message, bool modal);
+    // Asynchronous message notification
+    void message(const QString &title, const QString &message, bool modal, unsigned int style);
 
 public slots:
     /* Wallet status might have changed */
diff --git a/src/ui_interface.h b/src/ui_interface.h
index 0f7fdef264..693411aa6d 100644
--- a/src/ui_interface.h
+++ b/src/ui_interface.h
@@ -29,38 +29,46 @@ public:
     /** Flags for CClientUIInterface::ThreadSafeMessageBox */
     enum MessageBoxFlags
     {
-        YES                   = 0x00000002,
-        OK                    = 0x00000004,
-        NO                    = 0x00000008,
-        YES_NO                = (YES|NO),
-        CANCEL                = 0x00000010,
-        APPLY                 = 0x00000020,
-        CLOSE                 = 0x00000040,
-        OK_DEFAULT            = 0x00000000,
-        YES_DEFAULT           = 0x00000000,
-        NO_DEFAULT            = 0x00000080,
-        CANCEL_DEFAULT        = 0x80000000,
-        ICON_EXCLAMATION      = 0x00000100,
-        ICON_HAND             = 0x00000200,
-        ICON_WARNING          = ICON_EXCLAMATION,
-        ICON_ERROR            = ICON_HAND,
-        ICON_QUESTION         = 0x00000400,
-        ICON_INFORMATION      = 0x00000800,
-        ICON_STOP             = ICON_HAND,
-        ICON_ASTERISK         = ICON_INFORMATION,
-        ICON_MASK             = (0x00000100|0x00000200|0x00000400|0x00000800),
-        FORWARD               = 0x00001000,
-        BACKWARD              = 0x00002000,
-        RESET                 = 0x00004000,
-        HELP                  = 0x00008000,
-        MORE                  = 0x00010000,
-        SETUP                 = 0x00020000,
-        // Force blocking, modal message box dialog (not just OS notification)
-        MODAL                 = 0x00040000
+        ICON_INFORMATION    = 0,
+        ICON_WARNING        = (1U << 0),
+        ICON_ERROR          = (1U << 1),
+        /**
+         * Mask of all available icons in CClientUIInterface::MessageBoxFlags
+         * This needs to be updated, when icons are changed there!
+         */
+        ICON_MASK = (ICON_INFORMATION | ICON_WARNING | ICON_ERROR),
+
+        /** These values are taken from qmessagebox.h "enum StandardButton" to be directly usable */
+        BTN_OK      = 0x00000400U, // QMessageBox::Ok
+        BTN_YES     = 0x00004000U, // QMessageBox::Yes
+        BTN_NO      = 0x00010000U, // QMessageBox::No
+        BTN_ABORT   = 0x00040000U, // QMessageBox::Abort
+        BTN_RETRY   = 0x00080000U, // QMessageBox::Retry
+        BTN_IGNORE  = 0x00100000U, // QMessageBox::Ignore
+        BTN_CLOSE   = 0x00200000U, // QMessageBox::Close
+        BTN_CANCEL  = 0x00400000U, // QMessageBox::Cancel
+        BTN_DISCARD = 0x00800000U, // QMessageBox::Discard
+        BTN_HELP    = 0x01000000U, // QMessageBox::Help
+        BTN_APPLY   = 0x02000000U, // QMessageBox::Apply
+        BTN_RESET   = 0x04000000U, // QMessageBox::Reset
+        /**
+         * Mask of all available buttons in CClientUIInterface::MessageBoxFlags
+         * This needs to be updated, when buttons are changed there!
+         */
+        BTN_MASK = (BTN_OK | BTN_YES | BTN_NO | BTN_ABORT | BTN_RETRY | BTN_IGNORE |
+                    BTN_CLOSE | BTN_CANCEL | BTN_DISCARD | BTN_HELP | BTN_APPLY | BTN_RESET),
+
+        /** Force blocking, modal message box dialog (not just OS notification) */
+        MODAL               = 0x10000000U,
+
+        /** Predefined combinations for certain default usage cases */
+        MSG_INFORMATION = (ICON_INFORMATION | BTN_OK),
+        MSG_WARNING = (ICON_WARNING | BTN_OK | MODAL),
+        MSG_ERROR = (ICON_ERROR | BTN_OK | MODAL)
     };
 
     /** Show message box. */
-    boost::signals2::signal<void (const std::string& message, const std::string& caption, int style)> ThreadSafeMessageBox;
+    boost::signals2::signal<void (const std::string& message, const std::string& caption, unsigned int style)> ThreadSafeMessageBox;
 
     /** Ask the user whether they want to pay a fee or not. */
     boost::signals2::signal<bool (int64 nFeeRequired, const std::string& strCaption), boost::signals2::last_value<bool> > ThreadSafeAskFee;
diff --git a/src/util.cpp b/src/util.cpp
index 03014a5da0..2f36c66067 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -1248,7 +1248,7 @@ void AddTimeData(const CNetAddr& ip, int64 nTime)
                     string strMessage = _("Warning: Please check that your computer's date and time are correct! If your clock is wrong Bitcoin will not work properly.");
                     strMiscWarning = strMessage;
                     printf("*** %s\n", strMessage.c_str());
-                    uiInterface.ThreadSafeMessageBox(strMessage+" ", string("Bitcoin"), CClientUIInterface::OK | CClientUIInterface::ICON_EXCLAMATION);
+                    uiInterface.ThreadSafeMessageBox(strMessage, "", CClientUIInterface::MSG_WARNING);
                 }
             }
         }