refactor settings

web/repertory/lib/widgets/mount_settings.dart

@@ -81,6 +81,35 @@ class _MountSettingsWidgetState extends State<MountSettingsWidget> {
     );
   }
 
+  void _addIntListSetting(
+    list,
+    root,
+    key,
+    value,
+    List<String> valueList,
+    defaultValue,
+    icon,
+  ) {
+    list.add(
+      SettingsTile.navigation(
+        title: Text(key),
+        leading: Icon(icon),
+        value: DropdownButton<String>(
+          value: value.toString(),
+          onChanged: (newValue) {
+            setState(() {
+              root?[key] = int.parse(newValue ?? defaultValue.toString());
+            });
+          },
+          items:
+              valueList.map<DropdownMenuItem<String>>((item) {
+                return DropdownMenuItem<String>(value: item, child: Text(item));
+              }).toList(),
+        ),
+      ),
+    );
+  }
+
   void _addListSetting(list, root, key, value, List<String> valueList, icon) {
     list.add(
       SettingsTile.navigation(
@@ -213,7 +242,15 @@ class _MountSettingsWidgetState extends State<MountSettingsWidget> {
       } else if (key == "RetryReadCount") {
         _addIntSetting(commonSettings, _settings, key, value);
       } else if (key == "RingBufferFileSize") {
-        _addIntSetting(commonSettings, _settings, key, value);
+        _addIntListSetting(
+          commonSettings,
+          _settings,
+          key,
+          value,
+          ["128", "256", "512", "1024", "2048"],
+          512,
+          Icons.animation,
+        );
       } else if (key == "EncryptConfig") {
         value.forEach((subKey, subValue) {
           if (subKey == "EncryptionToken") {