Struct SemanticsConfiguration 

pub struct SemanticsConfiguration {

    pub content_description: Option<String>,
    pub state_description: Option<String>,
    pub on_click_label: Option<String>,
    pub on_long_click: Option<SemanticsLongClick>,
    pub on_long_click_label: Option<String>,
    pub role: Option<SemanticsWidgetRole>,
    pub selected: Option<bool>,
    pub toggled: Option<bool>,
    pub enabled: bool,
    pub is_clickable: bool,
    pub is_editable_text: bool,
    pub text: Option<String>,
    pub text_selection: Option<TextRange>,
    pub custom_actions: Vec<SemanticsCustomAction>,
    pub canvas_children: Vec<CanvasSemanticsNode>,
    pub is_modal: bool,
    pub hidden: bool,
    pub merge_descendants: bool,
    pub selectable_group: bool,
    pub pane_title: Option<String>,
    pub error: Option<String>,
    pub password: bool,
    pub traversal_index: f32,
    pub live_region: Option<LiveRegionMode>,
    pub progress: Option<ProgressBarRangeInfo>,
    pub set_progress: Option<SemanticsSetProgress>,
    pub set_text: Option<SemanticsSetText>,
    pub expand: Option<SemanticsExpand>,
    pub dismiss: Option<SemanticsDismiss>,
    pub collapse: Option<SemanticsExpand>,
    pub vertical_scroll: Option<ScrollAxisRange>,
    pub horizontal_scroll: Option<ScrollAxisRange>,
    pub scroll_by: Option<SemanticsScrollBy>,
    pub scroll_to_index: Option<SemanticsScrollToIndex>,
    pub collection: Option<CollectionInfo>,
}

Semantics configuration for accessibility.

Fields

content_description: Option<String>

state_description: Option<String>

Compose’s stateDescription.

on_click_label: Option<String>

Compose’s onClick(label = …); implies clickable.

on_long_click: Option<SemanticsLongClick>

What this control does when a screen reader asks for its long press. Compose’s onLongClick.

on_long_click_label: Option<String>

What the long press does, as a verb phrase a reader reads out: “Remove receipt”. Compose’s onLongClick(label = …).

role: Option<SemanticsWidgetRole>

Compose’s Role.

selected: Option<bool>

toggled: Option<bool>

enabled: bool

is_clickable: bool

is_editable_text: bool

text: Option<String>

The text an editable field holds, read as its value. Compose’s editableText.

text_selection: Option<TextRange>

custom_actions: Vec<SemanticsCustomAction>

canvas_children: Vec<CanvasSemanticsNode>

Controls this node drew itself instead of laying out. See CanvasSemanticsNode.

is_modal: bool

Whether this node takes over the screen: everything outside it is inert, and a screen reader keeps its traversal inside.

hidden: bool

Whether a screen reader skips this node and everything under it: a decorative image, or a placeholder drawn under a named field. Compose’s hideFromAccessibility.

merge_descendants: bool

Whether a screen reader takes this node and the text under it as one stop, the way it does for a button: a row whose name, count and price belong together. Compose’s mergeDescendants.

selectable_group: bool

Whether the selectable controls under this node form one group, so a screen reader says which of how many a tab or a radio button is. Compose’s selectableGroup.

pane_title: Option<String>

The title of the screen or pane this node is the root of, read out when the app moves to it. Compose’s paneTitle.

error: Option<String>

Why the control’s content is wrong, read after its state: “invalid, the amount needs a number”. Compose’s error.

password: bool

Whether this field holds a secret, so no screen reader reads its text out and no platform mirror carries it. Compose’s password.

traversal_index: f32

Where a screen reader visits this node among the ones beside it: a smaller number comes first, and nodes left at zero keep the order the app laid them out in. Compose’s traversalIndex.

live_region: Option<LiveRegionMode>

Compose’s liveRegion. When set, a screen reader reads this node again whenever its text changes, without the user moving to it.

progress: Option<ProgressBarRangeInfo>

Compose’s progressBarRangeInfo. A control with it is adjustable: a screen reader offers its own way to move the value.

set_progress: Option<SemanticsSetProgress>

What the control does when a screen reader moves its value. Compose’s setProgress.

set_text: Option<SemanticsSetText>

What this field does when a screen reader or a voice tool hands it text. Compose’s setText.

expand: Option<SemanticsExpand>

What this control does when a screen reader asks it to open. A control that says so reads as closed. Compose’s expand.

dismiss: Option<SemanticsDismiss>

What this control does when a screen reader asks to send it away: a row a sighted person swipes off, a sheet a sighted person taps outside of. Compose’s dismiss.

collapse: Option<SemanticsExpand>

What this control does when a screen reader asks it to close. A control that says so reads as open. Compose’s collapse.

vertical_scroll: Option<ScrollAxisRange>

How far this container scrolled up and down. Compose’s verticalScrollAxisRange.

horizontal_scroll: Option<ScrollAxisRange>

How far this container scrolled left and right. Compose’s horizontalScrollAxisRange.

scroll_by: Option<SemanticsScrollBy>

What this container does when a screen reader pages it. Compose’s scrollBy.

scroll_to_index: Option<SemanticsScrollToIndex>

What this list does when a screen reader asks for the row at an index, so a reader reaches row 300 without paging to it. Compose’s scrollToIndex.

collection: Option<CollectionInfo>

How many rows and columns this list holds. Compose’s collectionInfo.

Implementations

impl SemanticsConfiguration

pub fn new() -> SemanticsConfiguration

An empty spec to build on. Every field is what it is with no semantics declared at all.

pub fn content_description( self, name: impl Into<String>, ) -> SemanticsConfiguration

The name a screen reader reads for the control. Compose’s contentDescription.

pub fn state_description( self, state: impl Into<String>, ) -> SemanticsConfiguration

What the control says about itself after its name. Compose’s stateDescription.

pub fn clickable(self) -> SemanticsConfiguration

A screen reader offers to activate the control. Compose’s onClick.

pub fn on_long_click( self, label: impl Into<String>, action: impl Fn() -> bool + 'static, ) -> SemanticsConfiguration

What the control does when a screen reader asks for its long press, and the verb phrase a reader reads out for it. Compose’s onLongClick(label) { … }.

pub fn toggled(self, toggled: bool) -> SemanticsConfiguration

Whether the control is on or off. Compose’s toggleableState.

pub fn selected(self, selected: bool) -> SemanticsConfiguration

Whether the control is the one picked out of a group. Compose’s selected.

pub fn role(self, role: SemanticsWidgetRole) -> SemanticsConfiguration

What kind of control a screen reader reads this as. Compose’s Role.

pub fn heading(self) -> SemanticsConfiguration

Reads as a heading, so a reader can jump between the headings of a screen. Compose’s heading().

pub fn error(self, message: impl Into<String>) -> SemanticsConfiguration

Why the control’s content is wrong. Compose’s error.

pub fn password(self) -> SemanticsConfiguration

Holds a secret, so no reader reads the text out. Compose’s password.

pub fn pane_title(self, title: impl Into<String>) -> SemanticsConfiguration

Names the screen or pane this node is the root of. Compose’s paneTitle.

pub fn traversal_index(self, index: f32) -> SemanticsConfiguration

Where a reader visits this node among the ones beside it. Compose’s traversalIndex.

pub fn hidden(self) -> SemanticsConfiguration

Skips this node and everything under it. Compose’s hideFromAccessibility.

pub fn merge_descendants(self) -> SemanticsConfiguration

Takes this node and the text under it as one stop. Compose’s mergeDescendants.

pub fn selectable_group(self) -> SemanticsConfiguration

Makes the selectable controls under this node one group. Compose’s selectableGroup.

pub fn live_region(self, mode: LiveRegionMode) -> SemanticsConfiguration

Reads this node again whenever its text changes. Compose’s liveRegion.

pub fn merge(&mut self, other: &SemanticsConfiguration)

pub fn is_activatable(&self) -> bool

Whether a screen reader should offer activation. A named click label is how Compose declares onClick, so it implies the action the same way.

Trait Implementations

impl Clone for SemanticsConfiguration

fn clone(&self) -> SemanticsConfiguration

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SemanticsConfiguration

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

Formats the value using the given formatter.

impl Default for SemanticsConfiguration

fn default() -> SemanticsConfiguration

Returns the “default value” for a type.

impl PartialEq for SemanticsConfiguration

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SemanticsConfiguration