Struct CompositeTooltipWidget 

pub struct CompositeTooltipWidget { /* private fields */ }

Composite tooltip surface — hosts an arbitrary widget body with the same dwell-to-sticky promotion as the rich tooltip.

Implementations

impl CompositeTooltipWidget

pub fn new() -> Self

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

Set the tooltip body. Replaces any previously set body.

pub fn content_boxed(self, body: Box<dyn Widget>) -> Self

Set the tooltip body from an already-boxed widget. Used by the per-widget .composite_tooltip(...) setters that store Box<dyn Widget> and forward through attach_composite_tooltip_boxed.

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

Accessibility label (used for set_name on the AT node — the Role::Tooltip/Role::Dialog would otherwise be unnamed).

pub fn sticky(self, on: bool) -> Self

Override the per-theme composite_tooltip.max_width. Whether the surface offers dwell-to-sticky promotion. Default true.

Turn it off for a read-only body — a fact sheet, a data-view row’s card. Three things follow, all of them the point:

• no DwellIndicator is built, so nothing counts down towards an interaction that does not exist (and the footer disappears with it, letting the surface hug its content);
• the entry is registered with no sticky_after, so the tip never promotes, never outlives the pointer, and stays a Role::Tooltip rather than becoming a Dialog for assistive tech to announce;
• and, following the plain tier, it is not surfaced by keyboard focus — its text reaches assistive tech through the anchor’s own description instead, which is the W3C-recommended route for supplementary hints.

Callers reaching the tier through a widget’s .composite_tooltip(...) setter get the sticky default; opt out by building the widget yourself and attaching it with attach_composite_tooltip_widget_with_placement.

pub fn sticky_enabled(&self) -> bool

Whether dwell-to-sticky promotion is enabled — what an attach helper consults to decide the entry’s sticky_after.

pub fn max_width(self, w: f32) -> Self

pub fn max_height(self, h: f32) -> Self

Override the per-theme composite_tooltip.max_height.

pub fn shown_at_sink(&self) -> Rc<Cell<Option<Instant>>>

Cloneable shown_at_sink for the attach helper to thread into attach_tooltip_with_sticky_sink.

Trait Implementations

impl Debug for CompositeTooltipWidget

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

Formats the value using the given formatter.

impl Default for CompositeTooltipWidget

fn default() -> Self

Returns the “default value” for a type.

impl Widget for CompositeTooltipWidget

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

Place the body viewport and the dwell-indicator footer by hand.

The footer takes its natural height at the bottom; the viewport takes everything above it. That is the whole fix: the viewport is given a height rather than asked for one, so it can no longer claim its placeholder and push the indicator out of the bubble. Content taller than what is left simply scrolls, which is what the ScrollArea is for.

fn preserves_children_on_rebuild(&self) -> bool

Reconcile children across rebuilds rather than tearing them down. The body widget is owned once (self.body is taken on first build) and cannot be reconstructed on a later build(), so it must survive — otherwise the reused body_id would dangle. The body is re-parented under the freshly-built chrome each rebuild; the reconciling rebuild path follows authoritative parent pointers, so it keeps the re-parented body and destroys only the superseded old chrome. (In practice the composite tooltip has no Rebuild-level binding, so this path is rarely exercised.) Mirrors Switcher’s preserve-on-rebuild contract.

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 paint(&self, bounds: Rect, canvas: &mut Canvas, ctx: &PaintContext<'_>)

Draw the widget’s visual representation.

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 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 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).