Struct InteractSpec 

pub struct InteractSpec {

    pub hover_bg: Option<Color>,
    pub pressed_bg: Option<Color>,
    pub hover_group: Option<u64>,
    pub click_sound: Option<SoundId>,
    pub hover_sound: Option<SoundId>,
    pub focus_bg: Option<Color>,
    pub drop_bg: Option<Color>,
    pub selectable: bool,
    pub focus_region: bool,
    pub scrollbar: Scrollbar,
    pub overscroll: Overscroll,
    pub rules: Option<Color>,
    pub rule_w: f32,
    pub gradient: Option<Gradient>,
    pub backdrop_blur: f32,
}

Hover / pressed / focus styling and the sounds that go with them. Boxed on NodeSpec so the common node — which declares none of it — costs one null check in resolve_hover_style instead of reading several Options spread across the struct.

Fields

hover_bg: Option<Color>

Background while the pointer hovers this node (or any node sharing its hover_group). Resolved by the core when the node opens, so a data-only view gets hover styling without querying is_hovered — and with transition the swap eases. Implies hover tracking.

pressed_bg: Option<Color>

Background while this node (or its group) is pressed. Implies hover tracking. Without a hover_bg, hover keeps the plain bg. An on_drag node holds this state for the whole captured drag, even while the cursor is off it.

hover_group: Option<u64>

Hover group: nodes sharing an id count as one for hover_bg / pressed_bg — a two-piece elbow, a split button, a row whose cells highlight together. The id is a hash of a name (hover_group). Implies hover tracking.

click_sound: Option<SoundId>

A registered sound played when this node is clicked (see crate::audio); the click itself still emits on_click if one is declared. Implies hover tracking.

hover_sound: Option<SoundId>

A registered sound played when the pointer enters this node. Implies hover tracking.

focus_bg: Option<Color>

Background while this node holds keyboard-visible focus (focus moved by Tab or by assistive technology, not by a click). Declaring one replaces the ring the core draws by default. Pressed wins over focus wins over hover; eases with transition.

drop_bg: Option<Color>

Background while files dragged in from the OS are over this node. Wins over pressed, focus and hover — a press cannot be held while the OS holds a drag — and eases with transition; clears when the files leave, land or the drag is cancelled. Implies hover tracking.

selectable: bool

Makes this node a selection scope: the text of every node inside it is one selectable run of text, in tree order, and a press-drag inside it selects across all of them. Declared on the container rather than on each label, because what a reader selects is a paragraph or a card, not one run of it.

Scopes do not nest: the innermost one containing a run owns it, and an outer one is warned about (nested-selection-scope). An edit is already its own scope and ignores this.

focus_region: bool

Makes this node’s subtree a focus region: a Tab ring of its own that the ring outside never enters, and that never leaves — a devtools dock, an inspector beside the app. Entered on purpose: Ui::focus_region, a press inside it, or an explicit focus on a node in it. Nothing else about the node changes — it lays out, paints, takes the pointer and appears in the access tree as before, and keys bubble through it to the sink above.

scrollbar: Scrollbar

How this node’s scrollbars look, when it scrolls (see Scrollbar). Cold: read once per scroller when its layer’s chrome is emitted, which is why it lives in this box rather than beside scroll_y on every node.

overscroll: Overscroll

Whether a scroll gesture that starts over this scroller while it is at its limit that way goes on to the scroller around it (see Overscroll). Cold like scrollbar: read once per scroller a gesture starts over.

rules: Option<Color>

On a table: lines of this colour between its columns and between its rows, drawn with the table’s own box, under its cells, down the middle of each gap, so a table with a gap of at least rule_w gets a grid with no rule cells. The columns come from the row with the most cells; the lines run the table’s content box. Ignored on anything that is not a table.

rule_w: f32

The rules’ width in logical px; 0 is 1.

gradient: Option<Gradient>

A gradient painted over the node’s bg and under its border and its children (docs/adr/0042-a-gradient-is-an-image-the-core-paints.md): one image quad from the atlas, rounded by the node’s radius. It does not tween, and the state backgrounds replace bg, not it.

backdrop_blur: f32

Blur what the app drew beneath this node, inside its rounded rect, by this radius in logical px — CSS’s backdrop-filter: blur() (backlog F129). The blurred pixels are what was painted before the node (earlier siblings, ancestors, the window’s backdrop), never the node’s own bg or children, which paint over them; give it a translucent bg for frosted glass. Clipped as the node is; faded by its group opacity. 0 is none. A renderer with no way to read back its frame (the CPU raster) draws the node unblurred.

Implementations

impl InteractSpec

pub const EMPTY: Self

The group as a node that declares none of it — what NodeSpec’s accessor hands back when the box is None.

Trait Implementations

impl Clone for InteractSpec

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for InteractSpec

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

Formats the value using the given formatter.

impl Default for InteractSpec

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for InteractSpec

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for InteractSpec