Struct Scrollbar 

pub struct Scrollbar { /* private fields */ }

Scrollbar widget with position indicator and optional arrow buttons.

Implementations

impl Scrollbar

pub fn vertical(content_length: usize, viewport_length: usize) -> Self

Create a vertical scrollbar.

pub fn horizontal(content_length: usize, viewport_length: usize) -> Self

Create a horizontal scrollbar.

pub fn with_arrows(self, show: bool) -> Self

Set whether to show arrow buttons.

pub fn with_chars(self, chars: ScrollbarChars) -> Self

Set custom characters.

pub fn with_track_color(self, color: Color) -> Self

Set track color.

pub fn with_thumb_color(self, color: Color) -> Self

Set thumb color.

pub fn with_arrow_color(self, color: Color) -> Self

Set arrow color.

pub fn offset(&self) -> usize

Get current offset.

pub fn set_offset(&mut self, offset: usize)

Set scroll offset.

pub fn position(&self) -> f64

Get scroll position as fraction (0.0-1.0).

pub fn thumb_size(&self) -> f64

Get thumb size as fraction of viewport (0.0-1.0).

pub fn max_offset(&self) -> usize

Get maximum scroll offset.

pub fn is_scrollable(&self) -> bool

Check if content is scrollable.

pub fn scroll(&mut self, delta: i32)

Scroll by delta (positive = down/right, negative = up/left).

pub fn scroll_start(&mut self)

Scroll up/left by one unit.

pub fn scroll_end(&mut self)

Scroll down/right by one unit.

pub fn page_start(&mut self)

Page up/left.

pub fn page_end(&mut self)

Page down/right.

pub fn jump_to(&mut self, position: f64)

Jump to position (0.0-1.0).

pub fn jump_start(&mut self)

Jump to top/left.

pub fn jump_end(&mut self)

Jump to bottom/right.

pub fn update_lengths(&mut self, content_length: usize, viewport_length: usize)

Update content and viewport lengths.

pub fn orientation(&self) -> ScrollOrientation

Get the orientation.

pub fn content_length(&self) -> usize

Get content length.

pub fn viewport_length(&self) -> usize

Get viewport length.

Trait Implementations

impl Brick for Scrollbar

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

Get the brick’s unique type name

fn assertions(&self) -> &[BrickAssertion]

Get all assertions for this brick

fn budget(&self) -> BrickBudget

Get the performance budget

fn verify(&self) -> BrickVerification

Verify all assertions against current state

fn to_html(&self) -> String

Generate HTML for this brick (WASM target)

fn to_css(&self) -> String

Generate CSS for this brick (WASM target)

fn test_id(&self) -> Option<&str>

Get the test ID for DOM queries

fn can_render(&self) -> bool

Check if this brick can be rendered (all assertions pass)

impl Clone for Scrollbar

fn clone(&self) -> Scrollbar

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Scrollbar

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

Formats the value using the given formatter.

impl Default for Scrollbar

fn default() -> Self

Returns the “default value” for a type.

impl Widget for Scrollbar

fn type_id(&self) -> TypeId

Get the type identifier for this widget type.

fn measure(&self, constraints: Constraints) -> Size

Compute intrinsic size constraints.

fn layout(&mut self, bounds: Rect) -> LayoutResult

Position children within allocated bounds.

fn paint(&self, canvas: &mut dyn Canvas)

Generate draw commands for rendering.

fn event(&mut self, _event: &Event) -> Option<Box<dyn Any + Send>>

Handle input events.

fn children(&self) -> &[Box<dyn Widget>]

Get child widgets for tree traversal.

fn children_mut(&mut self) -> &mut [Box<dyn Widget>]

Get mutable child widgets.

fn is_interactive(&self) -> bool

Check if this widget is interactive (can receive focus/events).

fn is_focusable(&self) -> bool

Check if this widget can receive keyboard focus.

fn accessible_name(&self) -> Option<&str>

Get the accessible name for screen readers.

fn accessible_role(&self) -> AccessibleRole

Get the accessible role.

fn test_id(&self) -> Option<&str>

Get the test ID for this widget (if any).

fn bounds(&self) -> Rect

Get the current bounds of this widget.