Struct StandardTreeItem 

pub struct StandardTreeItem { /* private fields */ }

Canonical row layout for a TreeView — StandardListItem plus a depth-driven indent column and an always-reserved chevron column.

See the module-level documentation for the canonical TreeView wiring pattern and wiring rules.

Implementations

impl StandardTreeItem

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

Create a tree item with the given primary label.

pub fn interaction_signal(self, signal: Signal<InteractionState>) -> Self

Forwarded to the inner StandardListItem — see its subtitle. See StandardListItem::interaction_signal: the row’s own hover/press state, for a caller revealing controls on hover.

pub fn label_slot(self, widget: impl Widget + 'static) -> Self

See StandardListItem::label_slot: draw this instead of the label’s text, keeping the label as the row’s accessible name.

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

pub fn leading_slot(self, widget: impl Widget + 'static) -> Self

Forwarded to the inner StandardListItem — see its leading_slot.

pub fn leading_slot_boxed(self, widget: Box<dyn Widget>) -> Self

Box<dyn Widget> variant of leading_slot.

pub fn center_slot(self, widget: impl Widget + 'static) -> Self

Forwarded to the inner StandardListItem — see its center_slot.

pub fn center_slot_boxed(self, widget: Box<dyn Widget>) -> Self

Box<dyn Widget> variant of center_slot.

pub fn trailing_slot(self, widget: impl Widget + 'static) -> Self

Forwarded to the inner StandardListItem — see its trailing_slot.

pub fn trailing_slot_boxed(self, widget: Box<dyn Widget>) -> Self

Box<dyn Widget> variant of trailing_slot.

pub fn subtitle_leading_slot(self, widget: impl Widget + 'static) -> Self

Forwarded to the inner StandardListItem — see its subtitle_leading_slot.

pub fn subtitle_leading_slot_boxed(self, widget: Box<dyn Widget>) -> Self

Box<dyn Widget> variant of subtitle_leading_slot.

pub fn subtitle_trailing_slot(self, widget: impl Widget + 'static) -> Self

Forwarded to the inner StandardListItem — see its subtitle_trailing_slot.

pub fn subtitle_trailing_slot_boxed(self, widget: Box<dyn Widget>) -> Self

Box<dyn Widget> variant of subtitle_trailing_slot.

pub fn checkbox(self, checked: Signal<bool>) -> Self

Forwarded to the inner StandardListItem — see its checkbox.

pub fn tristate_checkbox(self, state: Signal<CheckState>) -> Self

Forwarded to the inner StandardListItem — see its tristate_checkbox.

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

Set the selection state, statically or reactively via a bound Signal<bool>. Forwarded to the inner StandardListItem — see its selected.

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

Set the enabled state, statically or reactively via a bound Signal<bool> / Prop<bool>. Forwarded to the inner StandardListItem.

pub fn label_style(self, style: impl Into<TextStyleProp>) -> Self

Override the label’s text style. Forwarded to the inner StandardListItem — see its label_style.

pub fn subtitle_style(self, style: impl Into<TextStyleProp>) -> Self

Override the subtitle’s text style. Forwarded to the inner StandardListItem — see its subtitle_style.

pub fn label_color(self, color: impl Into<ColorProp>) -> Self

Override the label’s text color. Forwarded to the inner StandardListItem — see its label_color(...).

pub fn subtitle_color(self, color: impl Into<ColorProp>) -> Self

Override the subtitle’s text color. Forwarded to the inner StandardListItem — see its subtitle_color(...).

pub fn label_overflow(self, overflow: TextOverflow) -> Self

Truncate the primary label instead of wrapping it. Forwarded to the inner StandardListItem — see its label_overflow.

pub fn subtitle_overflow(self, overflow: TextOverflow) -> Self

Truncate the subtitle instead of wrapping it. Forwarded to the inner StandardListItem — see its subtitle_overflow.

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

Per-call style override for the row chrome. Forwarded to the inner StandardListItem — see its style(...) for the precedence rules (per-call > theme.style_slots.standard_item > RecipeStandardItemStyle).

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

Attach a plain tooltip shown after the standard hover delay. Forwarded to the inner StandardListItem — see its tooltip.

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

Attach a rich tooltip looked up from the global tooltip registry by key. Forwarded to the inner StandardListItem — see its rich_tooltip.

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

Attach a rich tooltip from an inline TooltipContent value. Forwarded to the inner StandardListItem — see its rich_tooltip_content.

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

Attach a composite tooltip whose body is an arbitrary widget tree. Forwarded to the inner StandardListItem — see its composite_tooltip.

pub fn depth(self, depth: usize) -> Self

Set the indent depth (0 = root level). Each level adds one STANDARD_ITEM_TREE_INDENT_STEP of leading whitespace.

pub fn has_children(self, has: bool) -> Self

Declare whether the node has children, which determines whether the chevron column is interactive or decorative-only.

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

Set the expanded state, statically or reactively via a bound Signal<bool>.

pub fn from_entry(self, entry: &FlatEntry) -> Self

Convenience for the TreeView delegate path: .from_entry(entry) sets depth + has_children + is_expanded.

pub fn on_toggle(self, f: impl Fn(&mut EventContext<'_>) + 'static) -> Self

Click handler for the chevron. Wired only when has_children is true. Typical use: .on_toggle(ctx.toggle_callback()) from a TreeRowContext (see TreeView::new_with_context).

The callback receives the firing [EventContext] so apps can dispatch an intent (e.g. lazy-load children on expand), open a dialog, or otherwise route the toggle through the framework before mutating model state.

pub fn on_toggle_rc(self, f: Rc<dyn Fn(&mut EventContext<'_>)>) -> Self

Variant accepting an already-Rc’d callback. Useful when the same callback is shared across multiple call sites without an extra clone — e.g. TreeRowContext::toggle_callback() returns this shape directly.

Trait Implementations

impl Debug for StandardTreeItem

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

Formats the value using the given formatter.

impl Widget for StandardTreeItem

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).