# ConfigManager

> **Relevant source files**
> * [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java)

## Purpose and Scope

The `ConfigManager` system is responsible for managing all persistent user preferences in the MouseMacros application. It handles loading, saving, and providing access to configuration settings that control application behavior across categories including appearance, storage, execution, and hotkey mappings. The configuration is persisted as a JSON file (`config.cfg`) in the platform-specific application data directory.

For runtime state management such as window sizes and recent directories, see [CacheManager](CacheManager). For details on individual configuration categories and their effects, see [Configuration Files and Settings](Configuration-Files-and-Settings).

**Sources:** [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L1-L133](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L1-L133)

---

## Configuration System Overview

The following diagram shows how `ConfigManager` fits into the configuration persistence architecture:

```mermaid
flowchart TD

ConfigManager["ConfigManager"]
ConfigClass["Config (inner class)"]
GsonInstance["Gson (pretty-printed)"]
FileUtil["FileUtil"]
ConfigDir["CONFIG_DIR"]
ConfigFile["config.cfg (JSON)"]
SettingsDialog["SettingsDialog"]
MacroSettingsDialog["MacroSettingsDialog"]
MainFrame["MainFrame"]
ComponentUtil["ComponentUtil"]
Localizer["Localizer"]
MacroManager["MacroManager"]
StaticBlock["static { } block"]
LoadConfig["loadConfig()"]

StaticBlock --> FileUtil
StaticBlock --> ConfigFile
LoadConfig --> ConfigFile
LoadConfig --> GsonInstance
LoadConfig --> ConfigClass
ConfigManager --> ConfigFile
ConfigManager --> FileUtil
SettingsDialog --> ConfigManager
MacroSettingsDialog --> ConfigManager
MainFrame --> ConfigManager
ComponentUtil --> ConfigManager
Localizer --> ConfigManager
MacroManager --> ConfigManager

subgraph Initialization ["Initialization"]
    StaticBlock
    LoadConfig
    StaticBlock --> LoadConfig
end

subgraph subGraph2 ["Consuming Components"]
    SettingsDialog
    MacroSettingsDialog
    MainFrame
    ComponentUtil
    Localizer
    MacroManager
end

subgraph subGraph1 ["Storage Layer"]
    FileUtil
    ConfigDir
    ConfigFile
    FileUtil --> ConfigDir
end

subgraph subGraph0 ["Configuration Management"]
    ConfigManager
    ConfigClass
    GsonInstance
    ConfigManager --> ConfigClass
    ConfigManager --> GsonInstance
end
```

**Sources:** [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L14-L29](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L14-L29), [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L46-L76](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L46-L76)

---

## Config Data Structure

The `Config` inner class [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L31-L44](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L31-L44)

 represents the complete configuration state. All fields have default values that are used when creating a new configuration.

### Configuration Fields

| Field | Type | Default Value | Description |
| --- | --- | --- | --- |
| `followSystemSettings` | `boolean` | `true` | When enabled, language and theme follow OS settings |
| `lang` | `String` | `"zh_cn"` | Language code (e.g., `en_us`, `zh_cn`, `ja_jp`) |
| `enableDarkMode` | `boolean` | `false` | Dark theme toggle (only used when `followSystemSettings` is false) |
| `enableDefaultStorage` | `boolean` | `false` | Use default path for macro file operations |
| `defaultMmcStoragePath` | `String` | `""` | Default directory for saving/loading `.mmc` files |
| `enableQuickMode` | `boolean` | `false` | Skip recorded delays during playback |
| `allowLongStr` | `boolean` | `false` | Allow tooltips to display long strings |
| `readjustFrameMode` | `String` | `RFM_STANDARDIZED` | Window resize behavior: `MIXED`, `STANDARDIZED`, or `MEMORIZED` |
| `keyMap` | `Map<String, String>` | `new HashMap<>()` | Hotkey mappings (e.g., `"keyRecord"` → `"F2"`) |
| `enableCustomMacroSettings` | `boolean` | `false` | Use per-macro execution settings instead of global |
| `repeatTime` | `int` | `1` | Number of times to repeat macro playback |
| `repeatDelay` | `double` | `0` | Delay in seconds between macro repetitions |

**Sources:** [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L31-L44](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L31-L44)

---

## Readjust Frame Mode Constants

The `ConfigManager` defines three constants [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L21-L23](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L21-L23)

 for controlling window resizing behavior when language changes:

| Constant | Value | Behavior |
| --- | --- | --- |
| `RFM_MIXED` | `"MIXED"` | Uses cached sizes when available, otherwise standardized sizes |
| `RFM_STANDARDIZED` | `"STANDARDIZED"` | Always calculates new recommended size based on content |
| `RFM_MEMORIZED` | `"MEMORIZED"` | Always uses cached historical window sizes |

These constants are referenced by `ComponentUtil` when applying language changes to determine whether to resize windows.

**Sources:** [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L21-L23](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L21-L23)

---

## Static Initialization and Path Resolution

The `ConfigManager` initializes during class loading through a static block [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L25-L29](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L25-L29)

:

```mermaid
sequenceDiagram
  participant JVM
  participant ConfigManager
  participant FileUtil
  participant Filesystem

  JVM->>ConfigManager: "Load class"
  ConfigManager->>ConfigManager: "Enter static block"
  ConfigManager->>FileUtil: "getLocalStoragePath()"
  FileUtil->>Filesystem: "Detect OS, resolve path"
  Filesystem-->>FileUtil: "Platform-specific path"
  FileUtil-->>ConfigManager: "Path object"
  ConfigManager->>ConfigManager: "Set CONFIG_DIR"
  ConfigManager->>ConfigManager: "Construct CONFIG_PATH"
  ConfigManager->>ConfigManager: "Call loadConfig()"
  ConfigManager->>Filesystem: "Read config.cfg"
  Filesystem-->>ConfigManager: "JSON string or null"
  ConfigManager->>ConfigManager: "Deserialize or create default"
  ConfigManager->>ConfigManager: "Assign to config field"
```

The `CONFIG_DIR` field [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L15](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L15-L15)

 stores the platform-specific application data directory (e.g., `%LOCALAPPDATA%/MouseMacros` on Windows), while `CONFIG_PATH` [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L17](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L17-L17)

 points to the `config.cfg` file within that directory.

**Sources:** [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L25-L29](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L25-L29), [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L15-L17](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L15-L17)

---

## Configuration Loading

The `loadConfig()` method [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L49-L63](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L49-L63)

 implements the configuration loading logic with fallback behavior:

```mermaid
flowchart TD

Start["loadConfig()"]
ReadFile["FileUtil.readFile(CONFIG_PATH)"]
CheckNull["json == null or empty?"]
ParseJson["gson.fromJson(json, Config.class)"]
CreateDefault1["new Config()"]
SaveDefault1["saveConfig(cfg)"]
CreateDefault2["new Config()"]
SaveDefault2["saveConfig(_config)"]
Return1["Return cfg"]
Return2["Return parsed Config"]
Return3["Return _config"]

Start --> ReadFile
ReadFile --> CheckNull
ReadFile --> CreateDefault2
CheckNull --> CreateDefault1
CheckNull --> ParseJson
CreateDefault1 --> SaveDefault1
SaveDefault1 --> Return1
ParseJson --> Return2
CreateDefault2 --> SaveDefault2
SaveDefault2 --> Return3
```

**Loading Logic:**

1. Attempts to read `config.cfg` using `FileUtil.readFile()`
2. If file is missing or empty, creates a new `Config` with defaults and saves it
3. If file exists, deserializes JSON using Gson
4. On any `IOException`, creates and saves a default configuration
5. Returns the loaded or newly created `Config` object

The `reloadConfig()` method [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L46](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L46-L46)

 provides a way to refresh the static `config` field after external changes.

**Sources:** [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L46-L63](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L46-L63)

---

## Configuration Saving

The `saveConfig()` method [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L66-L76](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L66-L76)

 persists configuration changes to disk:

```mermaid
flowchart TD

Input["Config object"]
EnsureDir["Create CONFIG_DIR if needed"]
Serialize["gson.toJson(config)"]
WriteFile["FileUtil.writeFile(CONFIG_PATH, json)"]
HandleError["e.printStackTrace()"]

Input --> EnsureDir
EnsureDir --> Serialize
Serialize --> WriteFile
WriteFile --> HandleError
```

**Saving Process:**

1. Ensures the parent directory (`CONFIG_DIR`) exists, creating it if necessary [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L69-L70](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L69-L70)
2. Serializes the `Config` object to pretty-printed JSON using Gson [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L71](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L71-L71)
3. Writes the JSON string to `config.cfg` using `FileUtil.writeFile()` [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L72](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L72-L72)
4. Catches and prints any `IOException` that occurs [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L73-L75](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L73-L75)

The Gson instance [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L18](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L18-L18)

 is configured with `.setPrettyPrinting()` to make the JSON file human-readable.

**Sources:** [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L66-L76](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L66-L76), [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L18](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L18-L18)

---

## Available Languages Detection

The `getAvailableLangs()` method [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L79-L132](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L79-L132)

 detects all available language files at runtime, supporting both development (source directory) and production (JAR file) environments.

### Detection Strategy

```mermaid
flowchart TD

Start["getAvailableLangs()"]
DevMode["Localizer.isDevMode()"]
DevPath["List files in 'lang' directory"]
JarResource["Get lang/ resource URL"]
CheckProtocol["dirURL protocol?"]
JarMode["Read JAR entries"]
FileMode["List directory files"]
ExtractNames["Extract .json filenames"]
ReturnArray["Return String[] array"]

Start --> DevMode
DevMode --> DevPath
DevMode --> JarResource
DevPath --> ExtractNames
JarResource --> CheckProtocol
CheckProtocol --> JarMode
CheckProtocol --> FileMode
JarMode --> ExtractNames
FileMode --> ExtractNames
ExtractNames --> ReturnArray
```

### Development Mode

When `Localizer.isDevMode()` returns `true` [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L81-L91](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L81-L91)

:

* Lists files in the `lang` directory using `FileUtil.listFileNames()`
* Strips `.json` extensions to get language codes

### Production Mode (JAR)

When running from a JAR [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L93-L129](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L93-L129)

:

**JAR Protocol Handling:**

1. Gets the `lang/` resource URL from the class loader [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L94](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L94-L94)
2. Checks if the protocol is `"jar"` [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L95](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L95-L95)
3. Extracts the JAR file path from the URL [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L96-L103](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L96-L103)
4. Opens the JAR file and enumerates all entries [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L104-L105](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L104-L105)
5. Filters entries starting with `"lang/"` and ending with `".json"` [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L108](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L108-L108)
6. Extracts the language code from each entry name [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L109](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L109-L109)

**File Protocol Fallback:**

* If the protocol is `"file"` [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L114](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L114-L114)  lists files in the directory directly
* Filters for `.json` files [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L116](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L116-L116)

**Platform-Specific Path Handling:**

* On Windows, removes leading `/` from JAR paths [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L101-L103](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L101-L103)
* URL-decodes the path to handle special characters [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L100](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L100-L100)

**Sources:** [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L79-L132](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L79-L132)

---

## Integration Points

The following diagram shows how various components interact with `ConfigManager`:

```mermaid
flowchart TD

SettingsDialog["SettingsDialog"]
MacroSettingsDialog["MacroSettingsDialog"]
MainFrame["MainFrame"]
ConfigField["ConfigManager.config"]
LoadMethod["loadConfig()"]
SaveMethod["saveConfig(Config)"]
ReloadMethod["reloadConfig()"]
LangsMethod["getAvailableLangs()"]
AppearanceFields["followSystemSettings<br>lang<br>enableDarkMode<br>allowLongStr<br>readjustFrameMode"]
StorageFields["enableDefaultStorage<br>defaultMmcStoragePath"]
ExecutionFields["enableQuickMode<br>enableCustomMacroSettings<br>repeatTime<br>repeatDelay"]
HotkeyFields["keyMap"]
ThemeSystem["ComponentUtil<br>(Theme Application)"]
LocalizationSystem["Localizer<br>(Language Loading)"]
FileSystem["MacroManager<br>(File Operations)"]
PlaybackSystem["MacroManager<br>(Playback Execution)"]
HotkeySystem["GlobalMouseListener<br>(Hotkey Detection)"]

SettingsDialog --> ConfigField
MacroSettingsDialog --> ConfigField
MainFrame --> ConfigField
SettingsDialog --> SaveMethod
MacroSettingsDialog --> SaveMethod
SettingsDialog --> LangsMethod
ConfigField --> AppearanceFields
ConfigField --> StorageFields
ConfigField --> ExecutionFields
ConfigField --> HotkeyFields
AppearanceFields --> ThemeSystem
AppearanceFields --> LocalizationSystem
StorageFields --> FileSystem
ExecutionFields --> PlaybackSystem
HotkeyFields --> HotkeySystem

subgraph subGraph3 ["Consuming Systems"]
    ThemeSystem
    LocalizationSystem
    FileSystem
    PlaybackSystem
    HotkeySystem
end

subgraph subGraph2 ["Config Fields Groups"]
    AppearanceFields
    StorageFields
    ExecutionFields
    HotkeyFields
end

subgraph subGraph1 ["ConfigManager API"]
    ConfigField
    LoadMethod
    SaveMethod
    ReloadMethod
    LangsMethod
end

subgraph subGraph0 ["UI Components"]
    SettingsDialog
    MacroSettingsDialog
    MainFrame
end
```

### Read Access Patterns

Components typically access configuration directly through the static `config` field:

* `ConfigManager.config.followSystemSettings`
* `ConfigManager.config.lang`
* `ConfigManager.config.enableDarkMode`
* etc.

### Write Access Patterns

Components modify configuration and persist changes:

1. Read current config: `Config cfg = ConfigManager.config`
2. Modify fields: `cfg.lang = "en_us"`
3. Save changes: `ConfigManager.saveConfig(cfg)`
4. Optionally reload: `ConfigManager.reloadConfig()`

**Sources:** [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L19](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L19-L19), [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L46](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L46-L46), [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L66-L76](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L66-L76)

---

## JSON File Format

The `config.cfg` file uses JSON format with pretty-printing enabled. Example structure:

```json
{
  "followSystemSettings": true,
  "lang": "zh_cn",
  "enableDarkMode": false,
  "enableDefaultStorage": false,
  "defaultMmcStoragePath": "",
  "enableQuickMode": false,
  "allowLongStr": false,
  "readjustFrameMode": "STANDARDIZED",
  "keyMap": {
    "keyRecord": "F2",
    "keyStop": "F3",
    "keyPlay": "F4",
    "keyAbort": "F5"
  },
  "enableCustomMacroSettings": false,
  "repeatTime": 1,
  "repeatDelay": 0.0
}
```

The file is located at `CONFIG_DIR\config.cfg`, where `CONFIG_DIR` resolves to platform-specific paths (see [File and Path Utilities](File-and-Path-Utilities) for path resolution details).

**Sources:** [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L18](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L18-L18), [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L71](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L71-L71)

---

## Usage Examples

### Reading Configuration

```
// Access appearance settings
boolean useDarkMode = ConfigManager.config.enableDarkMode;
String currentLang = ConfigManager.config.lang;

// Access execution settings
boolean quickMode = ConfigManager.config.enableQuickMode;
int repeatCount = ConfigManager.config.repeatTime;

// Access storage settings
boolean useDefaultPath = ConfigManager.config.enableDefaultStorage;
String defaultPath = ConfigManager.config.defaultMmcStoragePath;
```

### Modifying Configuration

```
// Get current config
Config cfg = ConfigManager.config;

// Modify settings
cfg.lang = "en_us";
cfg.enableDarkMode = true;
cfg.repeatTime = 5;

// Persist changes
ConfigManager.saveConfig(cfg);

// Reload if needed (updates static field)
ConfigManager.reloadConfig();
```

### Detecting Available Languages

```
// Get all available language files
String[] langs = ConfigManager.getAvailableLangs();
// Returns: ["en_us", "zh_cn", "ja_jp", "ko_kr", "ru_ru", "es_es", "fr_fr"]

// Populate UI dropdown
for (String lang : langs) {
    comboBox.addItem(lang);
}
```

**Sources:** [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L19](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L19-L19), [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L66-L76](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L66-L76), [src/io/github/samera2022/mouse_macros/manager/ConfigManager.java L79-L132](https://github.com/Samera2022/MouseMacros/blob/1eb6620b/src/io/github/samera2022/mouse_macros/manager/ConfigManager.java#L79-L132)