Added 'Backup Wallet' menu option

- icon from the LGPL Nuvola set (like the tick) - http://www.icon-king.com/projects/nuvola/
- include 'boost/version.hpp' in db.cpp so that the overwrite version of copy can be used
- catch exceptions in BackupWallet (e.g. filesystem_error thrown when trying to overwrite without the overwrite flag set)
- include db.h in walletmodel.cpp for BackupWallet function
- updated doc/assets-attribution.txt and contrib/debian/copyright with copyright info for new icon

contrib/debian/copyright

@@ -37,7 +37,7 @@ Files: src/qt/res/icons/address-book.png, src/qt/res/icons/export.png,
        src/qt/res/icons/history.png, src/qt/res/icons/key.png,
        src/qt/res/icons/lock_*.png, src/qt/res/icons/overview.png,
        src/qt/res/icons/receive.png, src/qt/res/icons/send.png,
-       src/qt/res/icons/synced.png
+       src/qt/res/icons/synced.png, src/qt/res/icons/filesave.png
 Copyright: David Vignoni (david@icon-king.com)
            ICON KING - www.icon-king.com
 License: LGPL

doc/assets-attribution.txt

@@ -7,7 +7,7 @@ Icon: src/qt/res/icons/address-book.png, src/qt/res/icons/export.png,
       src/qt/res/icons/history.png, src/qt/res/icons/key.png,
       src/qt/res/icons/lock_*.png, src/qt/res/icons/overview.png,
       src/qt/res/icons/receive.png, src/qt/res/icons/send.png,
-      src/qt/res/icons/synced.png
+      src/qt/res/icons/synced.png, src/qt/res/icons/filesave.png
 Icon Pack: NUVOLA ICON THEME for KDE 3.x
 Designer: David Vignoni (david@icon-king.com)
           ICON KING - www.icon-king.com

src/db.cpp

@@ -6,6 +6,7 @@
 #include "headers.h"
 #include "db.h"
 #include "net.h"
+#include <boost/version.hpp>
 #include <boost/filesystem.hpp>
 #include <boost/filesystem/fstream.hpp>
 
@@ -1064,14 +1065,19 @@ bool BackupWallet(const CWallet& wallet, const string& strDest)
                 filesystem::path pathDest(strDest);
                 if (filesystem::is_directory(pathDest))
                     pathDest = pathDest / wallet.strWalletFile;
+
+                try {
 #if BOOST_VERSION >= 104000
-                filesystem::copy_file(pathSrc, pathDest, filesystem::copy_option::overwrite_if_exists);
+                    filesystem::copy_file(pathSrc, pathDest, filesystem::copy_option::overwrite_if_exists);
 #else
-                filesystem::copy_file(pathSrc, pathDest);
+                    filesystem::copy_file(pathSrc, pathDest);
 #endif
-                printf("copied wallet.dat to %s\n", pathDest.string().c_str());
+                    printf("copied wallet.dat to %s\n", pathDest.string().c_str());
-
+                    return true;
-                return true;
+                } catch(const filesystem::filesystem_error &e) {
+                    printf("error copying wallet.dat to %s - %s\n", pathDest.string().c_str(), e.what());
+                    return false;
+                }
             }
         }
         Sleep(100);

src/qt/bitcoin.qrc

@@ -37,6 +37,7 @@
         <file alias="lock_closed">res/icons/lock_closed.png</file>
         <file alias="lock_open">res/icons/lock_open.png</file>
         <file alias="key">res/icons/key.png</file>
+        <file alias="filesave">res/icons/filesave.png</file>
     </qresource>
     <qresource prefix="/images">
         <file alias="about">res/images/about.png</file>

src/qt/bitcoingui.cpp

@@ -46,6 +46,8 @@
 #include <QStackedWidget>
 #include <QDateTime>
 #include <QMovie>
+#include <QFileDialog>
+#include <QDesktopServices>
 
 #include <QDragEnterEvent>
 #include <QUrl>
@@ -243,6 +245,8 @@ void BitcoinGUI::createActions()
     encryptWalletAction = new QAction(QIcon(":/icons/lock_closed"), tr("&Encrypt Wallet"), this);
     encryptWalletAction->setToolTip(tr("Encrypt or decrypt wallet"));
     encryptWalletAction->setCheckable(true);
+    backupWalletAction = new QAction(QIcon(":/icons/filesave"), tr("&Backup Wallet"), this);
+    backupWalletAction->setToolTip(tr("Backup wallet to another location"));
     changePassphraseAction = new QAction(QIcon(":/icons/key"), tr("&Change Passphrase"), this);
     changePassphraseAction->setToolTip(tr("Change the passphrase used for wallet encryption"));
 
@@ -252,6 +256,7 @@ void BitcoinGUI::createActions()
     connect(aboutQtAction, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
     connect(openBitcoinAction, SIGNAL(triggered()), this, SLOT(showNormal()));
     connect(encryptWalletAction, SIGNAL(triggered(bool)), this, SLOT(encryptWallet(bool)));
+    connect(backupWalletAction, SIGNAL(triggered()), this, SLOT(backupWallet()));
     connect(changePassphraseAction, SIGNAL(triggered()), this, SLOT(changePassphrase()));
 }
 
@@ -277,6 +282,7 @@ void BitcoinGUI::createMenuBar()
     QMenu *settings = appMenuBar->addMenu(tr("&Settings"));
     settings->addAction(encryptWalletAction);
     settings->addAction(changePassphraseAction);
+    settings->addAction(backupWalletAction);
     settings->addSeparator();
     settings->addAction(optionsAction);
 
@@ -778,6 +784,17 @@ void BitcoinGUI::encryptWallet(bool status)
     setEncryptionStatus(walletModel->getEncryptionStatus());
 }
 
+void BitcoinGUI::backupWallet()
+{
+    QString saveDir = QDesktopServices::storageLocation(QDesktopServices::DocumentsLocation);
+    QString filename = QFileDialog::getSaveFileName(this, tr("Backup Wallet"), saveDir, tr("Wallet Data (*.dat)"));
+    if(!filename.isEmpty()) {
+        if(!walletModel->backupWallet(filename)) {
+            QMessageBox::warning(this, tr("Backup Failed"), tr("There was an error trying to save the wallet data to the new location."));
+        }
+    }
+}
+
 void BitcoinGUI::changePassphrase()
 {
     AskPassphraseDialog dlg(AskPassphraseDialog::ChangePass, this);

src/qt/bitcoingui.h

@@ -86,6 +86,7 @@ private:
     QAction *openBitcoinAction;
     QAction *exportAction;
     QAction *encryptWalletAction;
+    QAction *backupWalletAction;
     QAction *changePassphraseAction;
     QAction *aboutQtAction;
 
@@ -162,6 +163,8 @@ private slots:
     void incomingTransaction(const QModelIndex & parent, int start, int end);
     /** Encrypt the wallet */
     void encryptWallet(bool status);
+    /** Backup the wallet */
+    void backupWallet();
     /** Change encrypted wallet passphrase */
     void changePassphrase();
     /** Ask for pass phrase to unlock wallet temporarily */

src/qt/walletmodel.cpp

@@ -5,6 +5,7 @@
 #include "transactiontablemodel.h"
 
 #include "headers.h"
+#include "db.h" // for BackupWallet
 
 #include <QTimer>
 #include <QSet>
@@ -239,6 +240,11 @@ bool WalletModel::changePassphrase(const SecureString &oldPass, const SecureStri
     return retval;
 }
 
+bool WalletModel::backupWallet(const QString &filename)
+{
+    return BackupWallet(*wallet, filename.toLocal8Bit().data());
+}
+
 // WalletModel::UnlockContext implementation
 WalletModel::UnlockContext WalletModel::requestUnlock()
 {

src/qt/walletmodel.h

@@ -77,6 +77,8 @@ public:
     // Passphrase only needed when unlocking
     bool setWalletLocked(bool locked, const SecureString &passPhrase=SecureString());
     bool changePassphrase(const SecureString &oldPass, const SecureString &newPass);
+    // Wallet backup
+    bool backupWallet(const QString &filename);
 
     // RAI object for unlocking wallet, returned by requestUnlock()
     class UnlockContext