Struct ScrollbarPresentation 

pub struct ScrollbarPresentation { /* private fields */ }

Selectable visual and geometric policy for a Scrollbar.

The presentation stores separate glyph sets for both orientations so the same value can compose vertical and horizontal semantic scrollbars. A caller can clone a Theme-owned presentation and replace either set or any logical part style without changing the semantic value.

Implementations

impl ScrollbarPresentation

pub fn new(thumb_style: TextStyle, track_style: TextStyle) -> Self

Creates a proportional presentation with conventional thin rails.

pub fn get_glyphs(&self, orientation: ScrollbarOrientation) -> &ScrollbarGlyphs

pub fn glyphs( self, orientation: ScrollbarOrientation, glyphs: ScrollbarGlyphs, ) -> Self

Replaces the glyph set for one orientation.

pub const fn get_thumb_sizing(&self) -> ScrollbarThumbSizing

pub const fn thumb_sizing(self, thumb_sizing: ScrollbarThumbSizing) -> Self

Replaces the policy that maps viewport state onto the track.

pub fn get_style(&self, role: ScrollbarRole) -> &TextStyle

pub fn style(self, role: ScrollbarRole, style: TextStyle) -> Self

Replaces one complete logical part style.

pub fn thumb_style(self, style: TextStyle) -> Self

pub fn track_style(self, style: TextStyle) -> Self

pub fn begin_style(self, style: TextStyle) -> Self

pub fn end_style(self, style: TextStyle) -> Self

pub fn compose(&self, scrollbar: &Scrollbar) -> View

Composes the semantic viewport state into a one-cell-cross-axis View.

The main axis remains area-dependent. Resolving a vertical scrollbar therefore requires a finite height, and resolving a horizontal one requires a finite width.

Trait Implementations

impl Clone for ScrollbarPresentation

fn clone(&self) -> ScrollbarPresentation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ScrollbarPresentation

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

Formats the value using the given formatter.

impl PartialEq for ScrollbarPresentation

fn eq(&self, other: &ScrollbarPresentation) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for ScrollbarPresentation

impl StructuralPartialEq for ScrollbarPresentation