Struct LineGutter 

pub struct LineGutter { /* private fields */ }

A line-number gutter for a code editor: the column “1\n2\n3…” drawn top-aligned with the same line height a TextArea uses, so line n here sits exactly on line n of the editor. Place it beside the editor inside the same scroll (so they scroll together) and give both the same font_size. It measures its own width from the widest number and its height from the line count, re-measuring reactively as the count changes. Toggle it by collapsing its node (set_display) inside a ClippedItem so a hidden gutter both takes no width and draws nothing.

Implementations

impl LineGutter

pub fn new( line_count: impl Fn() -> usize + 'static, layout_style: LayoutStyle, style_fn: impl Fn() -> TextStyle + 'static, ) -> Result<Self, LayoutError>

Trait Implementations

impl Component for LineGutter

fn view(&self) -> RenderNode

fn on_event(&mut self, _event: &Event) -> EventResult

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

Human-readable widget type name for the devtools tree inspector.