A Dynamic Island experience for Windows 10+, built with Rust and Slint.
All.Functionality.mp4
Video: Lumen in action on Windows 11
Lumen brings a Dynamic Island-style notification and media hub to Windows. It lives at the top center of your screen as a pill-shaped overlay, surfacing system activity — media playback, notifications, microphone and camera usage — without interrupting your workflow.
Media.mp4 |
Notification.mp4 |
Indicators.mp4 |
- Media control — displays current track, album art, and playback controls. Supports play/pause, next, previous, and seek.
- Notifications — surfaces toast notifications inline with auto-dismiss after 3 seconds.
- Microphone & camera indicators — shows when any app is actively using your microphone or camera.
- Audio spectrum — real-time FFT-based audio visualizer with 24 frequency bands.
- Fullscreen detection — automatically hides when a fullscreen app is in the foreground.
- Clickthrough — passes mouse input through when idle so it never interferes with your workflow.
- Auto-updates — checks for new releases on startup and notifies via Windows toast.
- System tray — minimal tray presence with manual update check and quit option.
Download the latest installer from Releases:
Lumen-x.x.x-setup.exe
The installer will:
- Install Lumen to
%ProgramFiles%\Lumen - Add a Start menu entry
- Optionally create a desktop shortcut
- Optionally register Lumen to run at Windows startup
- Launch Lumen immediately after install
- Windows 10+
- Notification access must be granted when prompted on first launch
- Rust (stable, 1.85+)
- Inno Setup 7 (for installer)
- Run
cargo build --release - Compile with Inno setup installer
cargo build
cargo runLumen is split into two crates:
A Windows-specific library crate providing all system integrations:
| Module | Description |
|---|---|
services/* |
Polls various Windows APIs to create |
core |
Top-level IslandCore struct implementation |
bus |
crossbeam_channel based event bus for inter-service communication |
event |
Event types |
runtime |
Shared state (Arc<RwLock<T>>) accessible by both services and the UI |
utils |
Various utilities |
The Slint-based UI crate:
| Module | Description |
|---|---|
app |
Top-level Lumen struct wiring core events to UI dispatches |
state |
IslandState — content, mic, camera, expanded state |
geometry |
Wrappers around Physical and Logical dimensions |
sync |
Converts core types to Slint-compatible types |
platform/* |
Platform level logic - window positioning, configuration, clickthrough loop, system tray, updater |
Service (poll) → EventSender → EventReceiver (background thread)
↓
slint::invoke_from_event_loop
↓
Lumen::dispatch()
↓
IslandState → Slint UI
The UI is written in Slint and organized as follows:
ui/
Shell.slint — root window
Island.slint — main pill component with animation and state logic
IndicatorLayer.slint — mic/camera indicator dots
layouts/
Idle.slint — empty state
Media.slint — media playback layout
Notification.slint — notification layout
theme/
Colors.slint — color tokens
Metrics.slint — spacing and sizing tokens
types.slint — shared enums and structs
global.slint — IslandData global singleton
Lumen checks for new releases on startup (at most once every 24 hours). When a new version is found, a Windows toast notification is shown with an "Update Now" button. Clicking it downloads the installer and applies the update silently.
Manual update checks are available via the system tray menu.
Contributions are welcome, especially in the following areas:
- Multi-monitor support
- Additional media sources
- Accessibility improvements
- Performance improvements
Kindly open an Issue before submitting a PR
MIT — see LICENSE