Enum OverlayPlacement 

pub enum OverlayPlacement {
    Below,
    Above,
    TrailingEdge,
    AtPointer(Point),
    NearAnchor {
        offset: Vec2,
    },
    Centered,
    BottomCenter,
    BelowPreferred,
    ViewportCorner {
        corner: Corner,
        margin: Vec2,
    },
    FullViewport,
}

How an overlay is positioned relative to its anchor.

Variants

Below

Below the anchor, leading-edge aligned (dropdown).

Above

Above the anchor (fallback when no space below).

TrailingEdge

To the trailing side of the anchor (submenu).

AtPointer(Point)

At the pointer position (context menu).

NearAnchor

Near the anchor with a preferred alignment and offset (tooltip).

Fields

offset: Vec2

Centered

Centered within the viewport (dialog).

BottomCenter

Bottom-centered within the viewport (snackbar/toast).

BelowPreferred

Below the anchor if space allows, otherwise above (combo box dropdown). The viewport height is supplied by position_overlays() at layout time.

ViewportCorner

Snaps content to a viewport corner with a per-axis margin (used by ToastHost for stacked toast notifications, also suitable for picture-in-picture, floating action overlays). Anchor bounds are ignored. The leading/trailing axis honours LayoutDirection: TopTrailing is top-right under LTR and top-left under RTL.

Fields

corner: Corner

margin: Vec2

FullViewport

Fills the entire viewport, anchor-independent. Used by the modal-presentation pipeline to mount a dialog scrim behind a centered modal panel — the scrim covers the full window so the content behind dims uniformly. Anchor bounds are ignored.

Trait Implementations

impl Clone for OverlayPlacement

fn clone(&self) -> OverlayPlacement

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OverlayPlacement

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

Formats the value using the given formatter.