gui: add RPC setting

src/qt/forms/optionsdialog.ui

@@ -33,7 +33,7 @@
           <string>Automatically start %1 after logging in to the system.</string>
          </property>
          <property name="text">
-          <string>&amp;Start %1 on system login</string>
+          <string>Start %1 on system &amp;login</string>
          </property>
         </widget>
        </item>
@@ -173,13 +173,23 @@
            <property name="sizeHint" stdset="0">
             <size>
              <width>40</width>
-             <height>20</height>
+             <height>40</height>
             </size>
            </property>
           </spacer>
          </item>
         </layout>
        </item>
+       <item>
+        <widget class="QCheckBox" name="enableServer">
+         <property name="toolTip">
+          <string extracomment="Tooltip text for Options window setting that enables the RPC server.">This allows you or a third party tool to communicate with the node through command-line and JSON-RPC commands.</string>
+         </property>
+         <property name="text">
+          <string extracomment="An Options window setting to enable the RPC server.">Enable RPC &amp;server</string>
+         </property>
+        </widget>
+       </item>
        <item>
         <spacer name="verticalSpacer_Main">
          <property name="orientation">

src/qt/optionsdialog.cpp

@@ -210,6 +210,7 @@ void OptionsDialog::setModel(OptionsModel *_model)
     connect(ui->spendZeroConfChange, &QCheckBox::clicked, this, &OptionsDialog::showRestartWarning);
     /* Network */
     connect(ui->allowIncoming, &QCheckBox::clicked, this, &OptionsDialog::showRestartWarning);
+    connect(ui->enableServer, &QCheckBox::clicked, this, &OptionsDialog::showRestartWarning);
     connect(ui->connectSocks, &QCheckBox::clicked, this, &OptionsDialog::showRestartWarning);
     connect(ui->connectSocksTor, &QCheckBox::clicked, this, &OptionsDialog::showRestartWarning);
     /* Display */
@@ -246,6 +247,7 @@ void OptionsDialog::setMapper()
     mapper->addMapping(ui->mapPortUpnp, OptionsModel::MapPortUPnP);
     mapper->addMapping(ui->mapPortNatpmp, OptionsModel::MapPortNatpmp);
     mapper->addMapping(ui->allowIncoming, OptionsModel::Listen);
+    mapper->addMapping(ui->enableServer, OptionsModel::Server);
 
     mapper->addMapping(ui->connectSocks, OptionsModel::ProxyUse);
     mapper->addMapping(ui->proxyIp, OptionsModel::ProxyIP);

src/qt/optionsmodel.cpp

@@ -149,6 +149,13 @@ void OptionsModel::Init(bool resetSettings)
     if (!gArgs.SoftSetBoolArg("-listen", settings.value("fListen").toBool()))
         addOverriddenOption("-listen");
 
+    if (!settings.contains("server")) {
+        settings.setValue("server", false);
+    }
+    if (!gArgs.SoftSetBoolArg("-server", settings.value("server").toBool())) {
+        addOverriddenOption("-server");
+    }
+
     if (!settings.contains("fUseProxy"))
         settings.setValue("fUseProxy", false);
     if (!settings.contains("addrProxy"))
@@ -363,6 +370,8 @@ QVariant OptionsModel::data(const QModelIndex & index, int role) const
             return settings.value("nThreadsScriptVerif");
         case Listen:
             return settings.value("fListen");
+        case Server:
+            return settings.value("server");
         default:
             return QVariant();
         }
@@ -528,6 +537,12 @@ bool OptionsModel::setData(const QModelIndex & index, const QVariant & value, in
                 setRestartRequired(true);
             }
             break;
+        case Server:
+            if (settings.value("server") != value) {
+                settings.setValue("server", value);
+                setRestartRequired(true);
+            }
+            break;
         default:
             break;
         }

src/qt/optionsmodel.h

@@ -69,6 +69,7 @@ public:
         ExternalSignerPath,     // QString
         SpendZeroConfChange,    // bool
         Listen,                 // bool
+        Server,                 // bool
         OptionIDRowCount,
     };