Struct Checkbox 

pub struct Checkbox { /* private fields */ }

A checkbox that toggles a Signal<bool> or cycles a Signal<CheckState>.

Implementations

impl Checkbox

pub fn new(checked: Signal<bool>) -> Self

Create a two-state checkbox bound to a Signal<bool>.

pub fn tristate(state: Signal<CheckState>) -> Self

Create a tristate checkbox bound to a Signal<CheckState>.

User clicks toggle Checked ↔ Unchecked (clicking from Indeterminate checks the whole). The Indeterminate state is reserved for external sources — TreeCheckedModel aggregation when descendants are mixed, “select all” indicators, etc. Matches the Outlook / Files-app folder-checkbox semantic. Useful for parent checkboxes in tree views.

pub fn labels_hidden(self, hidden: bool) -> Self

Suppress the visual label/caption AND the debug-time “missing accessible label” assertion. Use this only when the checkbox is embedded inside a composite that owns the row’s accessible name (e.g. StandardListItem / StandardTreeItem, where the row’s accessibility(builder) calls set_name(...) with the row label).

A11y contract: when labels_hidden(true) is set, the caller MUST guarantee that an addressable AT ancestor provides the name — either via that ancestor’s own accessibility() impl or a builder-level .access_label* override. Without it the AT tree exposes a Role::CheckBox node with no name; screen readers announce “checkbox, checked” with no context. The Outlook / Files-app row pattern (where the row label covers the embedded checkbox) is the supported use case.

pub fn label(self, label: impl Into<LocalizedString>) -> Self

Set the visible label rendered to the right of the checkbox box, also used as the AT name. Required unless .labels_hidden(true) is set.

pub fn caption(self, text: impl Into<LocalizedString>) -> Self

Secondary explanatory text rendered below the label, left-aligned with the label (not the box). Uses the small / text_secondary style. Has no effect unless label(...) is also set.

pub fn enabled(self, enabled: impl Into<Prop<bool>>) -> Self

Set the enabled state, statically or reactively. Forwarded to the arena via ctx.enabled_when(self_id, self.enabled.clone()) at build time — a bound Signal<bool> updates live.

pub fn variant(self, variant: CheckboxVariant) -> Self

Pick the design-language variant. Default Square. The active CheckboxStyle impl decides what the variant means visually (the IntUI RecipeCheckboxStyle honours all three variants directly via corner-shape changes).

pub fn style(self, style: impl CheckboxStyle) -> Self

Per-call style override. Replaces the theme-wide default CheckboxStyle for just this Checkbox instance — same role as Button::style(...).

pub fn tooltip(self, text: impl Into<LocalizedString>) -> Self

Attach a plain tooltip shown after a hover delay. Clears any previously set rich or composite tooltip (last-call wins).

pub fn rich_tooltip(self, key: impl Into<String>) -> Self

Attach a rich tooltip resolved from the app-wide tooltip registry. See Button::rich_tooltip.

pub fn rich_tooltip_content(self, content: TooltipContent) -> Self

Attach a rich tooltip driven by inline TooltipContent.

pub fn composite_tooltip(self, content: impl Widget + 'static) -> Self

Attach a composite tooltip — third tier, hosting an arbitrary widget tree. See Button::composite_tooltip.

Trait Implementations

impl Debug for Checkbox

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

Formats the value using the given formatter.

impl Widget for Checkbox

Internal interaction state — local to this widget’s handlers; the active CheckboxStyle only sees the four derived boolean signals

fn build(&mut self, ctx: &mut BuildContext<'_>) -> Vec<WidgetId>

Compose child widgets. Called once after the widget is placed in the arena, and again on environment change (theme switch, locale switch). Takes &mut self — store child IDs, signal handles, any state needed later. Returns the list of root child IDs (empty for leaf widgets).

fn layout_response( &self, proposal: SizeProposal, ctx: &LayoutContext<'_>, ) -> LayoutResponse

Respond to the parent’s size proposal with this widget’s wanted size, grow/shrink weights, and compression floor (see [LayoutResponse]).

fn place_children( &self, bounds: Rect, _proposal: SizeProposal, children: &mut [WidgetPlacement], _ctx: &LayoutContext<'_>, )

Position children within the allocated bounds.

fn accessibility(&self, builder: &mut AccessNodeBuilder)

Declare this widget’s accessibility identity.

fn children(&self) -> Vec<WidgetId>

Return the child widget IDs that this widget manages.

fn type_name(&self) -> &'static str

Concrete type name of this widget (e.g. "teksilo_widgets::button::Button"). The default implementation resolves at the impl site via std::any::type_name::<Self>(), so calls through &dyn Widget correctly dispatch to the monomorphized fn for the concrete type — getting the concrete name through the vtable without per-impl boilerplate.

fn cacheable_layout(&self) -> bool

Whether this widget’s layout_response may be memoized by the per-pass layout cache. Defaults to true.

fn paint(&self, _bounds: Rect, _canvas: &mut Canvas, _ctx: &PaintContext<'_>)

Draw the widget’s visual representation.

fn wants_after_paint(&self) -> bool

Whether this widget wants its after_paint hook to fire each frame. Returning false (the default) saves a virtual call per widget per frame for the vast majority of widgets that don’t aggregate descendant geometry.

fn after_paint(&self, _view: &WidgetTreeView<'_>, _ctx: &PaintContext<'_>)

Called once per frame after this widget’s subtree has finished painting. Receives a read-only view of the layout-resolved arena so a parent can read its descendants’ final bounds — e.g. TitleBar aggregates its drag region and control-button rects into a single HitRegions payload for the Windows backend’s WM_NCHITTEST.

fn wants_post_paint(&self) -> bool

Whether this widget wants its post_paint hook to fire each frame. Returning false (the default) saves a virtual call per widget per frame for the vast majority of widgets that don’t draw a foreground over their children.

fn post_paint( &self, _bounds: Rect, _canvas: &mut Canvas, _ctx: &PaintContext<'_>, )

Draw a foreground layer over this widget’s children.

fn wants_descendant_redirects(&self) -> bool

Whether this widget wants the AT walker to consult its a11y_redirect_descendant hook for every descendant during AT tree emission, not just its direct arena children.

fn a11y_redirect_descendant( &self, _self_id: WidgetId, _descendant: WidgetId, ) -> Option<NodeId>

Optional redirection hook for AT-tree placement of a child.

fn accessible_title_hint(&self) -> Option<String>

Suggest an accessible title to an enclosing container that wraps this widget as content — typically a modal / dialog shell that wants to propagate the inner content’s visible title as the shell’s own accessible name.

fn initial_focus_hint(&self) -> Option<WidgetId>

Optional hint that directs initial focus to a specific descendant when this widget is the root of a deferred-built modal surface.

fn accessibility_children(&self) -> Option<Vec<WidgetId>>

Optional override for the child ORDER presented to assistive technology, when it must differ from the paint / z-order child order returned by children.

fn as_any(&self) -> Option<&(dyn Any + 'static)>

Downcast hook. Default implementation returns None; concrete widgets override with Some(self) when they want to expose their concrete type to test-level introspection or reflection. The trait already bounds on std::any::Any so concrete types satisfy the 'static requirement.

fn as_any_mut(&mut self) -> Option<&mut (dyn Any + 'static)>

Mutable counterpart of as_any. Default returns None; widgets that want to expose mutable state to tests (e.g. so a test can mutate a Scene inside a SceneView post-layout) override with Some(self). Should follow the same opt-in pattern as as_any: only widgets that opt into & introspection should opt into &mut.

fn clips_children(&self) -> bool

Whether this widget clips its children to its bounds.

fn focus_reveal_rect(&self, _bounds: Rect) -> Option<Rect>

The rectangle (in absolute tree coordinates) that best represents this widget when the framework reveals it into an ancestor scroll area on focus gain. Returning None (the default) reveals the widget’s whole bounds — correct for most controls.

fn hit_shape(&self, _local_point: Point, _bounds: Rect) -> bool

Whether the point lies inside this widget’s actual shape, not just its rectangular bounds. Consulted by hit-testing right after the bounds check: returning false for a point that is inside the bounding box makes the widget transparent to the click there, so it falls through to whatever sibling is painted underneath (the same machinery as a fully pass-through node, but shape-aware).

fn preserves_children_on_rebuild(&self) -> bool

How rebuild_single_widget treats this widget’s existing children when re-running its build().

fn tooltip_has_content(&self) -> bool

Whether this widget, used as tooltip content, currently has anything worth showing.

fn declare_shortcuts(&self) -> Vec<Shortcut>

Declare the rebindable keyboard shortcuts this widget exposes, without installing handlers. The framework calls this at arena insertion time (before build()) and at certain lazy boundaries (e.g. Switcher walks declarations on its not-yet-mounted Pending slots), so settings UIs and the ShortcutRegistry see the keystrokes the moment the owning container mounts — even if build() hasn’t run.

fn take_handler_set(&mut self) -> Option<HandlerSet>

Extract attached handler set from a WidgetWithHandlers wrapper. Called during arena insertion to transfer handlers to the WidgetNode. Default: returns None (no attached handlers).