Struct AccessSpec 

pub struct AccessSpec {

    pub role: Option<Role>,
    pub label: Option<Arc<str>>,
    pub description: Option<Arc<str>>,
    pub checked: bool,
    pub mixed: bool,
    pub selected: bool,
    pub expanded: Option<bool>,
    pub value_now: Option<f32>,
    pub value_min: Option<f32>,
    pub value_max: Option<f32>,
    pub value_text: Option<Arc<str>>,
    pub value_step: Option<f32>,
    pub caret: Option<u32>,
    pub selection_anchor: Option<u32>,
    pub caret_solid: bool,
    pub tooltip: bool,
    pub live: Live,
}

Accessibility properties a view states outright, as opposed to the ones the core derives (see crate::access). Boxed on NodeSpec: read only while an access tree is being built, and unset on nearly every node.

Fields

role: Option<Role>

What this node is to assistive technology (see crate::access). Unset, the core derives one: a node with on_click is a button, an editor a text input, a scrolling container a scroll view, and a plain box is structure that leaves no trace. Role::None hides the node and its subtree from the access tree (decoration).

label: Option<Arc<str>>

The accessible name. Without one a button, link, tab or heading is named by the text inside it; an image or an icon button has no name at all, and the core says so (control-without-name, image-without-label warnings).

description: Option<Arc<str>>

The accessible description, read after the name — what the description prop sets, and what the tooltip prop sets on the way to drawing the same string.

checked: bool

For checkbox / radio / switch roles: the on state.

mixed: bool

For a checkbox: neither on nor off, like the select-all box over a list some of whose rows are selected. Wins over checked, which it leaves as it was.

selected: bool

The current one of a set: a Role::Tab, a picked Role::ListItem, the Role::Link for the page you are on. A tab reports the state either way; a row or a link reports it only where it is set (see crate::access).

expanded: Option<bool>

For a node that shows and hides something: expanded, or collapsed. None = it does not expand, and says nothing about it.

value_now: Option<f32>

For a slider role: the current value and its range, so assistive technology can read the position (the drawing stays the view’s).

value_min: Option<f32>

value_max: Option<f32>

value_text: Option<Arc<str>>

For a slider role: what the position reads as (ARIA’s aria-valuetext). Without one a reader has only the three numbers above and says a percentage — 25 in [5..60] is “36 percent” — so a value whose unit matters says it here: “25 minutes”. It replaces the number rather than joining it (see crate::access), and a nudge announces the new text, not the new number.

value_step: Option<f32>

For a slider role: how far one arrow key moves it, and the grid a value set by the pointer snaps to. None = a hundredth of the range.

caret: Option<u32>

On a Role::Line of a custom editor: the caret’s byte offset into the line’s text, and the byte offset of the selection’s other end (see crate::access).

selection_anchor: Option<u32>

caret_solid: bool

With caret: the caret this line declares does not blink — a block caret in a modal editor’s normal mode — so a driver’s blink clock is not armed on it (Core::has_caret leaves it out) while the offset still anchors the IME and reads to assistive technology. Without it a declared caret is a caret to blink.

tooltip: bool

Float description below the node while it is hovered — the tooltip prop’s third effect, set by NodeSpec::tooltip. The core reads it as the node opens (Core::hint); a binding that lowers the prop onto a box floats the hint itself and leaves this off. A leaf reads it as it is pushed and floats the hint beside itself, anchored to it, since it holds no children for the hint to be the last of — which is how a binding asks it of a leaf (PropsOut::for_leaf, backlog RG113).

live: Live

When the text inside this node changes, a reader reads the change without being asked (ARIA’s aria-live). Off by default; a node that declares it is semantic, so a plain box marked live is not elided.

Implementations

impl AccessSpec

pub const EMPTY: AccessSpec

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 AccessSpec

fn clone(&self) -> AccessSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AccessSpec

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

Formats the value using the given formatter.

impl Default for AccessSpec

fn default() -> AccessSpec

Returns the “default value” for a type.

impl PartialEq for AccessSpec

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for AccessSpec