# 05: volume OSD

This example follows the structural OSD pattern:

- `Scope` groups the non-visual objects under one reload scope.
- `Connections` reacts to changes from the current default sink audio object.
- `Timer` controls visibility duration.
- `LazyLoader` creates the window only while needed.
- `PanelWindow` provides anchored layer-shell placement.
- an empty `Region` makes the surface click-through.

It does not use `FloatingWindow` with `WlrLayershell`.

Static check:

```sh
qmllint -I /usr/lib/qt6/qml examples/05-osd-volume/shell.qml
```

Do not trigger the real session's audio service during routine validation.
Appearance, timing, click-through behavior, and service reaction require separate isolated interaction and visual checks.