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TextField

Struct TextField 

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pub struct TextField<S: Binding<String>> { /* private fields */ }
Expand description

A single-line text input bound to a String (docs/textfield.md).

How it takes its text is set with .secure(_), .read_only(_), .input_purpose(_), .submit_label(_) and .max_length(_); secure_field is the password-field shorthand.

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impl<S: Binding<String>> TextField<S>

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pub fn enabled<M>(self, v: impl IntoReactive<bool, M>) -> Self

Whether the field takes input (default true); a constant or a reactive bool. A disabled field neither edits nor focuses; TextField::read_only keeps it selectable.

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pub fn placeholder<M>(self, t: impl IntoText<M>) -> Self

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pub fn on_submit(self, f: impl Fn() + 'static) -> Self

Fire when the user submits the field (Return / the keyboard’s action key). Field chaining is a focus write inside the handler: focus.set(Some(Field::Next)) (docs/focus.md).

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pub fn secure<M>(self, v: impl IntoReactive<bool, M>) -> Self

Hide the characters as they are typed (default false). Reactive: bind it to a signal for a show-password switch. The text, the placeholder and the focus carry across the change on every backend, including the two whose secure field is a different native class.

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pub fn read_only<M>(self, v: impl IntoReactive<bool, M>) -> Self

Show the text and let it be selected and copied, and take no edits (default false). Reactive. Unlike .disabled(true) the field keeps its ordinary look and still takes focus.

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pub fn input_purpose(self, purpose: InputPurpose) -> Self

What the field collects: the on-screen keyboard, capitalization and correction, and what the system offers to fill in all follow from it.

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pub fn submit_label(self, label: SubmitLabel) -> Self

What the on-screen keyboard’s action key says. The key fires on_submit either way.

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pub fn max_length(self, characters: u32) -> Self

The most characters the field takes. Typing or pasting past it is cut to fit before the bound value sees it.

Trait Implementations§

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impl<S: Binding<String>> Piece for TextField<S>

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fn build(self, cx: &mut BuildCx) -> RNode

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impl<S: Binding<String>> TextFieldBuilder for TextField<S>

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fn enabled<M>(self, v: impl IntoReactive<bool, M>) -> Self

Whether the field takes input (default true); a constant or a reactive bool. A disabled field neither edits nor focuses; TextField::read_only keeps it selectable.
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fn placeholder<M>(self, t: impl IntoText<M>) -> Self

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fn on_submit(self, f: impl Fn() + 'static) -> Self

Fire when the user submits the field (Return / the keyboard’s action key). Field chaining is a focus write inside the handler: focus.set(Some(Field::Next)) (docs/focus.md).
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fn secure<M>(self, v: impl IntoReactive<bool, M>) -> Self

Hide the characters as they are typed (default false). Reactive: bind it to a signal for a show-password switch. The text, the placeholder and the focus carry across the change on every backend, including the two whose secure field is a different native class.
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fn read_only<M>(self, v: impl IntoReactive<bool, M>) -> Self

Show the text and let it be selected and copied, and take no edits (default false). Reactive. Unlike .disabled(true) the field keeps its ordinary look and still takes focus.
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fn input_purpose(self, purpose: InputPurpose) -> Self

What the field collects: the on-screen keyboard, capitalization and correction, and what the system offers to fill in all follow from it.
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fn submit_label(self, label: SubmitLabel) -> Self

What the on-screen keyboard’s action key says. The key fires on_submit either way.
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fn max_length(self, characters: u32) -> Self

The most characters the field takes. Typing or pasting past it is cut to fit before the bound value sees it.

Auto Trait Implementations§

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impl<S> !RefUnwindSafe for TextField<S>

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impl<S> !Send for TextField<S>

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impl<S> !Sync for TextField<S>

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impl<S> !UnwindSafe for TextField<S>

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impl<S> Freeze for TextField<S>
where S: Freeze,

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impl<S> Unpin for TextField<S>
where S: Unpin,

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impl<S> UnsafeUnpin for TextField<S>
where S: UnsafeUnpin,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<P> Decorate for P
where P: Piece,

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fn id(self, id: ElementId) -> Decorated<Self>

Stable element identifier: a11y identifier + dayscript locator + lint uniqueness (§5.5). Read more
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fn wrapper_id(self, id: ElementId) -> Decorated<Self>

Name the node that is outermost at this point in the chain: the padding box, the frame, the background, whichever wrapper the modifiers before it built. For a dayscript frame assertion on the wrapper rather than on the piece. Ordered, unlike id.
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fn apply_if( self, cond: bool, f: impl FnOnce(Decorated<Self>) -> Decorated<Self>, ) -> Decorated<Self>

Apply f to the chain when cond holds, else continue unchanged (see Decorated::apply_if): nav(sel).apply_if(!primary, |n| n.local()). The closure receives the decorated piece, so forwarded builder methods and modifiers both chain inside it.
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fn apply_some<T>( self, value: Option<T>, f: impl FnOnce(Decorated<Self>, T) -> Decorated<Self>, ) -> Decorated<Self>

Apply f with the value when there is one, else continue unchanged (see Decorated::apply_some): canvas(draw).apply_some(id, |c, id| c.id(id)).
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fn id_of(self, id: impl Fn() -> ElementId + 'static) -> Decorated<Self>

Reactive element id: the id for rows inside a recycling list. A plain id is assigned once at build, but a recycled cell rebinds to different items over its life (and drag-to-reorder rebinds eagerly), so a static item-derived id keeps naming the first-bound item. This variant re-registers whenever the closure’s value changes; read your ItemSlot inside it: .id_of(move || day_core::id!(row_remove, slot.key())).
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fn tweak(self, f: impl FnOnce(RNode) + 'static) -> Decorated<Self>

Apply a tweak: f runs once at mount, after the native widget exists, with the realized node (docs/tweaks.md). Reach the typed native handle through the compiled backend’s ext accessor (day_appkit::with_native, day_gtk::with_native, …), or apply a packaged day-tweak-* crate’s modifier instead of calling this directly. If the native change affects the widget’s intrinsic size, follow it with day_core::invalidate_size. Day may overwrite managed properties (title, value, enabled, frame, a11y) on its next patch; unmanaged properties are stable. Read more
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fn selectable(self) -> Decorated<Self>

Make this piece’s text user-selectable, so the reader can select and copy it (docs/text.md). Most useful on a label: text is not selectable by default on any backend, matching each platform’s native behavior. Read more
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fn cursor<M>(self, cursor: impl IntoReactive<Cursor, M>) -> Decorated<Self>

Shape the pointer while it is over this piece and its descendants (docs/cursor.md): a Cursor constant, a Signal<Cursor>, or a closure, so a canvas tool or a busy state moves the shape without rebuilding the piece. The nearest ancestor’s cursor wins, and Cursor::Default releases the piece back to the platform. capability(Cap::Cursor) says whether this toolkit draws the requested shapes, a nearest neighbor, or nothing; a touch-only host never shows one, which is correct rather than a failure.
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fn window_drag_region(self) -> Decorated<Self>

Let the user move the window by dragging this piece, as a title bar does (docs/window-chrome.md): what a custom title bar in a WindowChrome::Overlay or WindowChrome::Frameless window needs. The piece’s own background starts the drag, with the platform’s snapping and tiling; buttons and fields inside it keep their clicks; a double click does what the user’s title-bar setting says (zoom, minimize, nothing). capability(Cap::DragRegion); on a phone the piece is an ordinary view.
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fn native_ref(self, r: &NativeRef) -> Decorated<Self>

Capture a NativeRef to this piece’s realized node for later imperative access (docs/tweaks.md). The ref clears automatically when the piece’s scope is disposed.
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fn padding(self, insets: impl IntoInsets) -> Decorated<Self>

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fn max_width(self, max: f64) -> Decorated<Self>

Cap this piece’s width at max points: the child is never PROPOSED more, so text wraps inside the cap (chat bubbles, readable columns) while narrower content hugs.
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fn min_width(self, min: f64) -> Decorated<Self>

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fn reserving(self, sample: impl Into<String>) -> Decorated<Self>

Reserve at least the space sample needs, so this piece’s size stops changing with its content. Read more
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fn frame(self, width: f64, height: f64) -> Decorated<Self>

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fn width(self, width: f64) -> Decorated<Self>

Fix this piece’s width to width points while its height stays flexible (hugging its content or filling on the cross axis). The single-axis complement to Self::frame, e.g. a fixed-width sidebar pane in a row whose height fills the window.
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fn height(self, height: f64) -> Decorated<Self>

Fix this piece’s height to height points while its width stays flexible. The single-axis complement to Self::frame, e.g. a fixed-height header/toolbar bar that fills its width.
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fn a11y( self, f: impl FnOnce(A11yBuilder) -> A11yBuilder + 'static, ) -> Decorated<Self>

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fn on_tap(self, f: impl Fn() + 'static) -> Decorated<Self>

Fire when this piece is tapped (bounding-box; shapes override with path-precise testing). Read more
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fn on_tap_at(self, f: impl Fn(Point) + 'static) -> Decorated<Self>

on_tap, told where: the point in the piece’s own coordinate space, origin at its top-leading corner. Read more
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fn focused<M>(self, binding: impl IntoFocusBinding<M>) -> Decorated<Self>

Bind this control’s keyboard focus to a signal (docs/focus.md), two-way like every other binding: native focus changes write the signal; writing the signal moves focus. Takes a Signal<bool> for one control, or (Signal<Option<K>>, K::Variant) binding one control of a group; writing false/None resigns focus (dismissing the soft keyboard on mobile). Focus applies asynchronously: a write is a request, resolved on the next turn, and the signal always ends up reflecting what the platform actually did.
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fn on_key(self, f: impl Fn(&KeyEvent) + 'static) -> Decorated<Self>

Handle the non-text keys (the arrows) that reach this piece while it has focus (docs/menus.md). Keys follow focus, so pair it with Decorate::focused or with a piece the user can click into: a canvas takes focus on a press, and only the focused piece hears the keys, so a nudge handler can never fire while a text field, a list or a sidebar is the one being typed into. Read more
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fn toolbar<M>(self, content: impl ToolbarContent<M>) -> Decorated<Self>

Declare toolbar items on the chrome this piece sits under (docs/toolbars.md). Read more
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fn searchable(self, search: Search) -> Decorated<Self>

A search field for this navigation page (docs/search.md, “Page search”), drawn where the platform puts a page’s search: the window toolbar on a desktop, the page’s navigation bar on iOS (a UISearchController), its app bar on Android. It shows while this page does, and its text is the app’s query both ways. For a search the server runs, act on crate::Search::on_submit; for a local filter, read the query. Declare it on a nav_stack destination, as .toolbar(…) is declared; a whole navigation surface takes crate::Nav::searchable instead.
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fn focusable(self) -> Decorated<Self>

Opt this piece into the platform’s focus system (docs/focus.md): the canvas contract for anything composed: it joins the key loop, takes focus on a press, reports through .focused(…), and hears the arrows through .on_key(…) while focused. A composed list column is the motivating case (docs/navigation.md). On a backend without the set_focusable duty the piece renders normally and never takes focus.
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fn drag_source( self, source: impl Fn(Point) -> Option<Offer> + 'static, ) -> Decorated<Self>

Attach a context menu, shown with the platform’s native affordance on secondary-click (desktop) or long-press (mobile). Items are built with menu_item/sub_menu/menu_role/ menu_separator. Passing an empty Vec removes any menu.
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fn drop_target(self, target: Target) -> Decorated<Self>

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fn context_menu<M>(self, menu: impl ContextMenuContent<M>) -> Decorated<Self>

A context menu (docs/menus.md): shown on secondary-click / long-press, built from the same menu_item/sub_menu entries as everywhere else. Takes a fixed list, or a closure built when the menu is summoned (“Dynamic context menus”): with no argument, or with the summon point in this piece’s own coordinates, so a canvas can select what is under the pointer and offer commands for that selection. An empty result shows nothing. Read more
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fn on_drag(self, f: impl Fn(Drag) + 'static) -> Decorated<Self>

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fn on_pinch(self, f: impl Fn(Pinch) + 'static) -> Decorated<Self>

Fire on each phase of a pinch/magnify over this piece (docs/canvas.md “Zoom and pan”). Only backends with a native recognizer wired emit it; pair a zoom with visible controls.
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fn on_pan(self, f: impl Fn(Pan) + 'static) -> Decorated<Self>

Fire on each viewport-pan event over this piece (docs/canvas.md “Zoom and pan”): trackpad two-finger scroll, two-finger touch pan. delta is incremental; apply it as it arrives.
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fn on_hover(self, f: impl Fn(Option<Point>) + 'static) -> Decorated<Self>

The pointer moving over this piece: Some(point) in its own coordinates while inside, None when it leaves (docs/canvas.md “Interaction”). Pointer-only; wire on_tap_at alongside it so a touch-only device can reach the same thing.
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fn card(self) -> Decorated<Self>

Fill the piece’s bounds with a solid color painted behind it: a message-bubble / card / badge surface. Accepts a constant Color, a Signal<Color>, or a Fn() -> Color; a reactive color repaints the surface when its source changes. Wraps the piece in a native container that carries the fill, so it composes with Self::corner_radius for a rounded colored surface and with Self::padding for interior inset. The platform’s card around this piece: the grouped-content surface with rounded corners and a Space::M inset (see Decorated::card).
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fn background<M>(self, color: impl IntoReactive<Color, M>) -> Decorated<Self>

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fn corner_radius(self, radius: f64) -> Decorated<Self>

Round the piece’s corners to radius points, clipping its background and content to the rounded rectangle. Compose after Self::background for a rounded colored surface, or use alone to round a clipped child (e.g. an avatar image).
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fn opacity<M>(self, opacity: impl IntoReactive<f64, M>) -> Decorated<Self>

Animate/set the piece’s opacity (0.0 transparent … 1.0 opaque). Wrapped in a native layer so it composes with .background; the change animates when made inside with_animation or under a .animation ancestor (§8.4).
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fn transform<M>(self, t: impl IntoReactive<Transform, M>) -> Decorated<Self>

Apply an animatable Transform (translate/scale/rotate about the center): the cheap movement/scaling channel that never triggers relayout (§8.4). Prefer this over .offset for animated motion.
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fn scale<M>(self, factor: impl IntoReactive<f64, M>) -> Decorated<Self>

Uniformly scale the piece by factor about its center (animatable). Convenience over Self::transform.
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fn rotation<M>(self, degrees: impl IntoReactive<f64, M>) -> Decorated<Self>

Rotate the piece by degrees clockwise about its center (animatable).
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fn translation<Mx, My>( self, x: impl IntoReactive<f64, Mx>, y: impl IntoReactive<f64, My>, ) -> Decorated<Self>

Translate the piece by (x, y) points without relayout (animatable): the animation-friendly sibling of .offset.
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fn animation(self, anim: AnimSpec) -> Decorated<Self>

Attach an implicit animation (§8.4): changes to this piece’s (and its descendants’) animatable properties animate with anim even outside a with_animation. SwiftUI’s .animation. The ambient with_animation takes precedence when both apply.
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fn modifier(self, m: impl Modifier) -> AnyPiece

Apply a Modifier (or, via the blanket impl, a plain FnOnce(AnyPiece) -> AnyPiece closure) to this piece. Pure composition: content.modifier(m) == m.apply(content.any()). Read more
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fn overlay(self, over: impl Piece) -> Decorated<Self>

Draw over on top of this piece, centered, without affecting layout size: a badge / annotation overlay. self is the sizing content (bottom of the z-order); over is proposed self’s size and drawn on top. For an explicit alignment use Self::overlay_aligned; for a stack that sizes to the union of its children use zstack.
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fn overlay_aligned(self, align: Alignment, over: impl Piece) -> Decorated<Self>

Self::overlay with an explicit Alignment for the annotation (e.g. a corner badge with Alignment::TopTrailing).
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fn aspect_ratio(self, ratio: f64) -> Decorated<Self>

Constrain this piece to a width / height ratio: the largest box of that shape which fits whatever the parent offers (SwiftUI’s .aspectRatio(_:contentMode: .fit)). Read more
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fn grow(self) -> Decorated<Self>

Expand to fill the available space on both axes (a filling pane / card that stretches to its container). Wraps the piece in a layout-only node carrying grow Flex: the stack offers it the space and it fills; no native backing, so this is a pure layout change.
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fn grow_w(self) -> Decorated<Self>

Expand to fill the available horizontal space.
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fn grow_h(self) -> Decorated<Self>

Expand to fill the available vertical space.
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fn grid_align(self, a: Alignment) -> Decorated<Self>

Override this cell’s alignment within its cell rect of the enclosing grid (docs/grid.md). Apply last (outermost), like Decorated::grid_span.
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fn defers_system_gestures(self, edges: Edges) -> Decorated<Self>

While this subtree is mounted, ask the OS to require a second swipe for its edge gestures on edges (docs/cover.md), the SwiftUI defersSystemGestures(on:) analogue. Put it on a game or drawing surface whose touches run to the screen edge, so a swipe up from the bottom doesn’t leave the app. iOS defers the chosen edges’ system gestures; Android enters swipe-to-reveal immersive mode while any subtree requests deferral; desktop backends no-op.
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fn status_bar_hidden<M>( self, hidden: impl IntoReactive<bool, M>, ) -> Decorated<Self>

While this subtree is mounted and hidden is true, hide the system status bar, the SwiftUI statusBarHidden(_:) analogue (docs/cover.md). hidden is a constant, a Signal, or a closure, so a setting can turn it on and off in place. Put it on a page that wants the whole screen (a reader, a game, a photo viewer); the bar returns when the page unmounts. Any mounted request that answers true hides the bar. iOS, Android and HarmonyOS hide it (Cap::StatusBarHidden); desktop and web have none and ignore it.
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fn interactive_dismiss_disabled(self) -> Decorated<Self>

While this subtree is mounted, the enclosing cover (or other modal surface) must not be dismissed interactively, the SwiftUI interactiveDismissDisabled() analogue (docs/cover.md). System back / sheet gestures are ignored; only programmatic writes (an explicit close control) dismiss it.
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fn any(self) -> AnyPiece

Erase to a single AnyPiece: for a Vec<AnyPiece>, a -> AnyPiece signature, or any other place one concrete type is required. AnyPiece::any is inherent and returns self, so erasing an already-erased piece costs nothing.
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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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