Struct DrawListBuilder 

pub struct DrawListBuilder { /* private fields */ }

Builds a command list. Each call appends one fixed-size record; TextAt also appends its bytes to the text region, which is written after every record.

Implementations

impl DrawListBuilder

pub fn with_capacity(commands: usize, text_bytes: usize) -> Self

pub fn view_box(self, width: f32, height: f32) -> Self

Interprets command coordinates in a (width, height) reference coordinate space scaled to the Canvas container’s measured size. Stroke widths stay in dp.

pub fn fractional(self) -> Self

Interprets command coordinates as 0.0..=1.0 fractions of the Canvas container’s width and height. Stroke widths stay in dp.

pub fn push(self, command: DrawCommand) -> Self

Appends any command. TextAt offsets are fixed up by DrawListBuilder::build, so prefer DrawListBuilder::text_at for text.

pub fn line( self, paint: Paint, x1: f32, y1: f32, x2: f32, y2: f32, stroke_width: f32, ) -> Self

pub fn rect( self, paint: Paint, x: f32, y: f32, width: f32, height: f32, stroke_width: f32, ) -> Self

A stroke width of zero fills the rectangle.

pub fn round_rect( self, paint: Paint, x: f32, y: f32, width: f32, height: f32, radius: f32, stroke_width: f32, ) -> Self

pub fn circle( self, paint: Paint, center_x: f32, center_y: f32, radius: f32, stroke_width: f32, ) -> Self

pub fn arc( self, paint: Paint, center_x: f32, center_y: f32, radius: f32, start_degrees: f32, sweep_degrees: f32, stroke_width: f32, ) -> Self

pub fn polyline_ref( self, paint: Paint, asset_id: u32, stroke_width: f32, ) -> Self

Draws a registered point list. The asset holds the points, so the record stays the same size however long the path is.

pub fn text_at( self, paint: Paint, text: &str, x: f32, y: f32, type_role: TypeRole, ) -> Self

Draws text at the type role’s size with its top-left corner at (x, y). The point is the top of the line, not its baseline, so text placed near a canvas’s bottom edge needs the role’s whole line height above that edge.

pub fn build(self) -> DrawList

Trait Implementations

impl Debug for DrawListBuilder

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

Formats the value using the given formatter.

impl Default for DrawListBuilder

fn default() -> Self

Returns the “default value” for a type.