Enum SurfaceRole 

pub enum SurfaceRole {
    Drawer,
    Popup,
    Osd,
    Float,
    Overlay,
}

What kind of secondary surface a placement describes. A backend maps the role to its own surface primitives (a layer-shell backend picks a layer + namespace; a windowed backend a child window or an in-window portal). Roles carry no behaviour of their own — the explicit SurfacePlacement fields do.

Variants

Drawer

A panel that slides off a bar/edge, dimming what’s behind it.

Popup

A transient, positioned popup (a notification, a menu detached from its trigger).

Osd

A brief, non-interactive status flash (volume/brightness), auto-dismissed.

Float

A free-floating window with its own title/close affordances.

Overlay

A modal that owns the screen while it is up: a launcher, a command palette, a session menu. Unlike a Drawer it isn’t anchored to an edge, and unlike a Float it expects to take the keyboard outright — the user is typing into it, not at whatever is behind it.

Trait Implementations

impl Clone for SurfaceRole

fn clone(&self) -> SurfaceRole

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for SurfaceRole

impl Debug for SurfaceRole

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for SurfaceRole

impl PartialEq for SurfaceRole

fn eq(&self, other: &SurfaceRole) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for SurfaceRole