qt: Show also value for options overridden on command line

Currently only the name of the option is shown for GUI options
overridden by command line (or configuration file). This commit
adds the value of the options as well, which is useful for
troubleshooting.

src/qt/optionsmodel.cpp

@@ -30,6 +30,11 @@ OptionsModel::OptionsModel(QObject *parent) :
     Init();
 }
 
+void OptionsModel::addOverriddenOption(const std::string &option)
+{
+    strOverriddenByCommandLine += QString::fromStdString(option) + "=" + QString::fromStdString(mapArgs[option]) + " ";
+}
+
 // Writes all missing QSettings with their default values
 void OptionsModel::Init()
 {
@@ -76,23 +81,23 @@ void OptionsModel::Init()
         settings.setValue("nTransactionFee", 0);
     nTransactionFee = settings.value("nTransactionFee").toLongLong(); // if -paytxfee is set, this will be overridden later in init.cpp
     if (mapArgs.count("-paytxfee"))
-        strOverriddenByCommandLine += "-paytxfee ";
+        addOverriddenOption("-paytxfee");
 
     if (!settings.contains("bSpendZeroConfChange"))
         settings.setValue("bSpendZeroConfChange", true);
     if (!SoftSetBoolArg("-spendzeroconfchange", settings.value("bSpendZeroConfChange").toBool()))
-        strOverriddenByCommandLine += "-spendzeroconfchange ";
+        addOverriddenOption("-spendzeroconfchange");
 #endif
 
     if (!settings.contains("nDatabaseCache"))
         settings.setValue("nDatabaseCache", (qint64)nDefaultDbCache);
     if (!SoftSetArg("-dbcache", settings.value("nDatabaseCache").toString().toStdString()))
-        strOverriddenByCommandLine += "-dbcache ";
+        addOverriddenOption("-dbcache");
 
     if (!settings.contains("nThreadsScriptVerif"))
         settings.setValue("nThreadsScriptVerif", 0);
     if (!SoftSetArg("-par", settings.value("nThreadsScriptVerif").toString().toStdString()))
-        strOverriddenByCommandLine += "-par ";
+        addOverriddenOption("-par");
 
     // Network
     if (!settings.contains("fUseUPnP"))
@@ -100,9 +105,9 @@ void OptionsModel::Init()
         settings.setValue("fUseUPnP", true);
 #else
         settings.setValue("fUseUPnP", false);
-#endif	
+#endif
     if (!SoftSetBoolArg("-upnp", settings.value("fUseUPnP").toBool()))
-        strOverriddenByCommandLine += "-upnp ";
+        addOverriddenOption("-upnp");
 
     if (!settings.contains("fUseProxy"))
         settings.setValue("fUseProxy", false);
@@ -110,18 +115,18 @@ void OptionsModel::Init()
         settings.setValue("addrProxy", "127.0.0.1:9050");
     // Only try to set -proxy, if user has enabled fUseProxy
     if (settings.value("fUseProxy").toBool() && !SoftSetArg("-proxy", settings.value("addrProxy").toString().toStdString()))
-        strOverriddenByCommandLine += "-proxy ";
+        addOverriddenOption("-proxy");
     if (!settings.contains("nSocksVersion"))
         settings.setValue("nSocksVersion", 5);
     // Only try to set -socks, if user has enabled fUseProxy
     if (settings.value("fUseProxy").toBool() && !SoftSetArg("-socks", settings.value("nSocksVersion").toString().toStdString()))
-        strOverriddenByCommandLine += "-socks ";
+        addOverriddenOption("-socks");
 
     // Display
     if (!settings.contains("language"))
         settings.setValue("language", "");
     if (!SoftSetArg("-lang", settings.value("language").toString().toStdString()))
-        strOverriddenByCommandLine += "-lang";
+        addOverriddenOption("-lang");
 
     language = settings.value("language").toString();
 }

src/qt/optionsmodel.h

@@ -75,6 +75,9 @@ private:
     /* settings that were overriden by command-line */
     QString strOverriddenByCommandLine;
 
+    /// Add option to list of GUI options overridden through command line/config file
+    void addOverriddenOption(const std::string &option);
+
 signals:
     void displayUnitChanged(int unit);
     void transactionFeeChanged(qint64);