MultiMouse is a utility for swapping between different sets of mouse sensitivity settings on Windows.

It was created because I use both a mouse and a trackball for different tasks, and prefer different sensitivity and acceleration profiles for each one.

• Define up to 9 sensitivity profiles, which include:
  • Mouse sensitivity and acceleration settings
  • A hotkey which activates the profile
• Cycle between profiles using a hotkey
• The currently selected profile is displayed on the tray icon

MultiMouse is accessed via an icon in the system tray.

Building requires zig:

zig build -Doptimize=ReleaseSafe

The binary will be located at zig-out\bin\multimouse.exe

The configuration is stored in %LOCALAPPDATA%\multi-mouse.json. If this file doesn't exist, a default configuration will be written using your current mouse settings.

The definition of the configuration is as follows:

const Config = struct {
    const Profile = struct {
        name: []const u8,
        color: []const u8 = "ffffffff",
        hotkey: ?Hotkey = null,
        settings: MouseSettings,
    };

    const Hotkey = struct {
        modifiers: struct {
            alt: bool = false,
            ctrl: bool = false,
            shift: bool = false,
            win: bool = false,
        } = .{},
        key_code: u8,
    };

    profiles: []Profile = &.{},
    cycle_hotkey: ?Hotkey = null,
};

const MouseSettings = extern struct {
    mouse_threshold_1: windows.INT,
    mouse_threshold_2: windows.INT,
    mouse_speed: windows.INT,
    mouse_sensitivity: windows.INT,
}

mouse_sensitivity corresponds to the pointer speed set in the "Mouse Properties" dialog.

mouse_speed corresponds to the "Enhance pointer precision" option, and is defined in more detail, along with the threshold values here.

key_code is virtual-key code as defined here.

The tray icon has an Edit configuration option which will open the configuration in your default text editor. Use Reload configuration to reload the configuration.

{
    "profiles": [
        {
            "name": "Mouse",
            "color": "00ff00",
            "settings": {
                "mouse_threshold_1": 0,
                "mouse_threshold_2": 0,
                "mouse_speed": 0,
                "mouse_sensitivity": 10
            },
            "hotkey": {
                "modifiers": {
                    "shift": true,
                    "win": true
                },
                "key_code": 112
            }
        },
        {
            "name": "Trackball",
            "color": "00ffff",
            "hotkey": null,
            "settings": {
                "mouse_threshold_1": 4,
                "mouse_threshold_2": 10,
                "mouse_speed": 2,
                "mouse_sensitivity": 15
            }
        }
    ],
    "cycle_hotkey": {
        "modifiers": {
            "win": true
        },
        "key_code": 112
    }
}

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