Struct ScrollView 

pub struct ScrollView { /* private fields */ }

Scrolls its children with the wheel, a touchpad or by dragging its scroll bars.

Give it a style with Overflow::Scroll, as ScrollView::style does: its children are then laid out at their own size and cut at its edges. A wheel scroll it cannot use (already at the end) goes on to the views around it.

Implementations

impl ScrollView

pub fn new() -> Self

A scroll view.

pub fn style() -> Style

A column filling its parent’s free space, allowed to be smaller than its content, and scrolling the overflow.

Trait Implementations

impl Debug for ScrollView

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

Formats the value using the given formatter.

impl Default for ScrollView

fn default() -> Self

Returns the “default value” for a type.

impl Widget for ScrollView

fn accessibility(&self, cx: &PaintCx<'_>, node: &mut AccessNode)

Describes the widget to assistive technology: fills node, which starts as a Role::Group with the widget’s rectangle. Called only while assistive technology is listening; it may allocate.

fn paint_over(&mut self, cx: &PaintCx<'_>, canvas: &mut Canvas<'_>)

Paints the widget over its children: scroll bars, focus rings, overlays.

fn event(&mut self, cx: &mut EventCx<'_>, event: &Event<'_>) -> Handled

Handles event. An event the widget does not handle goes on to its parent.

fn measure(&mut self, cx: &mut LayoutCx<'_>, constraints: Constraints) -> Size

The size the widget wants within constraints, for a widget without children (one with children is sized by its style and its children). Physical pixels.

fn layout(&mut self, cx: &mut LayoutCx<'_>, size: Size)

Layout decided the widget’s size: re-wrap text or recompute anything that depends on it. Called after every layout pass that changed the size.

fn paint(&mut self, cx: &PaintCx<'_>, canvas: &mut Canvas<'_>)

Paints the widget below its children.

fn accepts_focus(&self) -> bool

Whether the widget takes keyboard focus, by click or by Tab.

fn focus_on_press(&self) -> bool

Whether a press on the widget, or on a widget inside it that takes no focus, focuses it (if it accepts focus). A container reachable by Tab, such as a dock’s tab list, says no, so clicks on its contents do not focus it; it can still ask for focus itself.

fn access_action( &mut self, cx: &mut EventCx<'_>, request: &AccessRequest<'_>, ) -> Handled

Does what assistive technology asks (only actions the widget’s node lists are asked of it). Focus and scrolling into view are done for every widget; a request the widget does not handle goes on to its parent if it is a scroll.