Struct ComputedScrollbarStyle 

pub struct ComputedScrollbarStyle {

    pub width_mode: LayoutScrollbarWidth,
    pub visual_width_px: f32,
    pub reserve_width_px: f32,
    pub thumb_color: ColorU,
    pub track_color: ColorU,
    pub button_color: ColorU,
    pub corner_color: ColorU,
    pub clip_to_container_border: bool,
    pub fade_delay_ms: u32,
    pub fade_duration_ms: u32,
    pub visibility: ScrollbarVisibilityMode,
    pub show_scroll_buttons: bool,
    pub scroll_button_size_px: f32,
    pub show_corner_rect: bool,
    pub thumb_color_hover: Option<ColorU>,
    pub thumb_color_active: Option<ColorU>,
    pub track_color_hover: Option<ColorU>,
    pub visual_width_px_hover: Option<f32>,
    pub visual_width_px_active: Option<f32>,
}

Computed scrollbar style for a node.

All visual defaults (colors, width) come from the UA CSS conditional rules in core/src/ua_css.rs — individual CssPropertyWithConditions entries for scrollbar-color and scrollbar-width, keyed on @os / @theme.

Overlay behaviour (fade timing, visibility, clip) is derived from the resolved scrollbar-width mode:

• thin → overlay: fade 500/200 ms, WhenScrolling, clip = true
• auto → classic: no fade, Always, clip = false
• none → hidden: no fade, Always, clip = false

Per-node CSS overrides (in priority order):

1. -azul-scrollbar-style (full ScrollbarInfo override)
2. scrollbar-width (overrides width + overlay mode)
3. scrollbar-color (overrides thumb / track colours)

Fields

width_mode: LayoutScrollbarWidth

The scrollbar width mode (auto/thin/none)

visual_width_px: f32

Visual width in pixels — used for rendering track + thumb. Non-zero even for overlay scrollbars.

reserve_width_px: f32

Reserve width in pixels — layout space subtracted from content area. 0 for overlay scrollbars, equal to visual_width_px for legacy.

thumb_color: ColorU

Thumb color

track_color: ColorU

Track color

button_color: ColorU

Button color (for scroll arrows)

corner_color: ColorU

Corner color (where scrollbars meet)

clip_to_container_border: bool

Whether to clip the scrollbar to the container’s border-radius

fade_delay_ms: u32

Delay in ms before scrollbar starts fading out (0 = never fade)

fade_duration_ms: u32

Duration of fade-out animation in ms (0 = instant)

visibility: ScrollbarVisibilityMode

Scrollbar visibility mode (always / when-scrolling / auto)

show_scroll_buttons: bool

Whether to show top/bottom (or left/right) arrow buttons. When false, the track spans the entire scrollbar length.

scroll_button_size_px: f32

Size of each arrow button in px (square: width = height). Only used when show_scroll_buttons == true.

show_corner_rect: bool

Whether to show the corner rect where V and H scrollbars meet.

thumb_color_hover: Option<ColorU>

Thumb color when hovered (None = use thumb_color)

thumb_color_active: Option<ColorU>

Thumb color when pressed/active (None = use thumb_color)

track_color_hover: Option<ColorU>

Track color when hovered (None = use track_color)

visual_width_px_hover: Option<f32>

Visual width when hovered (None = use visual_width_px)

visual_width_px_active: Option<f32>

Visual width when pressed (None = use visual_width_px)

Trait Implementations

impl Clone for ComputedScrollbarStyle

fn clone(&self) -> ComputedScrollbarStyle

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ComputedScrollbarStyle

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

Formats the value using the given formatter.

impl Default for ComputedScrollbarStyle

fn default() -> Self

Returns the “default value” for a type.